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  • 1
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-07-08
    Description: Separation and purification are critical industrial processes for separating components of chemical mixtures, and these processes account for about half of industrial energy usage (1). Gas mixtures of compounds with very similar physical properties are particularly difficult to separate. On pages 137 and 141 of this issue, Cadiau et al. (2) and Cui et al. (3), respectively, show that microporous materials can be designed to have high adsorption capacity and selectivity for particular hydrocarbons, enabling energy-efficient separation. Author: Jerry Y. S. Lin
    Keywords: Chemistry
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  • 2
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-05-27
    Description: Biomass-degrading microorganisms use lytic polysaccharide monooxygenase (LPMO) enzymes to help digest cellulose, chitin, and starch. By cleaving otherwise inaccessible crystalline cellulose chains, these enzymes provide access to hydrolytic enzymes. LPMOs are of interest to biotechnology because efficient depolymerization of cellulose is a major bottleneck for the production of biologically based chemicals and fuels. On page 1098 of this issue, Kracher et al. (1) compare LPMO-reducing substrates in fungi from different taxonomic groups and lifestyles, based on both biochemical and genomic evidence. The results provide insights into reductive activation of LPMO that are important for developing more efficient industrial enzymes for lignocellulose biorefineries. Author: Angel T. Martínez
    Keywords: Chemistry
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  • 3
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-03-25
    Description: Author: Marc S. Lavine
    Keywords: Chemistry
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  • 4
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-02-16
    Keywords: Chemistry
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  • 5
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-02-16
    Description: The comment and response concerning the report of oxidation of methane to methanol by water (Reports, 5 May 2017, p. 523) do not fully capture the implications of thermodynamic limitations. A nonisothermal process in which each cycle requires a large temperature swing and permits only substoichiometric methane conversion surely could not be carried out on any practical scale.
    Keywords: Chemistry
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  • 6
    Publication Date: 2018-02-16
    Description: Labinger argues that stepwise reaction of methane with water to produce methanol and hydrogen will never be commercially feasible because of its substoichiometric basis with respect to the active site and the requirement of a large temperature swing. This comment is not touching any new ground, beyond describing the thermodynamic feasibility, thermal cycling, and the role of water as discussed previously. Most important, it does not have a solid numerical basis.
    Keywords: Chemistry
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  • 7
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-07-27
    Keywords: Chemistry
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  • 8
    Publication Date: 2018-07-27
    Description: Vinyl carbocations have been the subject of extensive experimental and theoretical studies over the past five decades. Despite this long history in chemistry, the utility of vinyl cations in chemical synthesis has been limited, with most reactivity studies focusing on solvolysis reactions or intramolecular processes. Here we report synthetic and mechanistic studies of vinyl cations generated through silylium–weakly coordinating anion catalysis. We find that these reactive intermediates undergo mild intermolecular carbon-carbon bond–forming reactions, including carbon-hydrogen (C–H) insertion into unactivated sp 3 C–H bonds and reductive Friedel-Crafts reactions with arenes. Moreover, we conducted computational studies of these alkane C–H functionalization reactions and discovered that they proceed through nonclassical, ambimodal transition structures. This reaction manifold provides a framework for the catalytic functionalization of hydrocarbons using simple ketone derivatives.
    Keywords: Chemistry
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  • 9
    Publication Date: 2018-06-22
    Description: It is commonly assumed that recognition and discrimination of chirality, both in nature and in artificial systems, depend solely on spatial effects. However, recent studies have suggested that charge redistribution in chiral molecules manifests an enantiospecific preference in electron spin orientation. We therefore reasoned that the induced spin polarization may affect enantiorecognition through exchange interactions. Here we show experimentally that the interaction of chiral molecules with a perpendicularly magnetized substrate is enantiospecific. Thus, one enantiomer adsorbs preferentially when the magnetic dipole is pointing up, whereas the other adsorbs faster for the opposite alignment of the magnetization. The interaction is not controlled by the magnetic field per se, but rather by the electron spin orientations, and opens prospects for a distinct approach to enantiomeric separations.
    Keywords: Chemistry
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  • 10
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-06-29
    Keywords: Chemistry
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  • 11
    Publication Date: 2018-12-14
    Description: Theory has established the importance of geometric phase (GP) effects in the adiabatic dynamics of molecular systems with a conical intersection connecting the ground- and excited-state potential energy surfaces, but direct observation of their manifestation in chemical reactions remains a major challenge. Here, we report a high-resolution crossed molecular beams study of the H + HD -〉 H 2 + D reaction at a collision energy slightly above the conical intersection. Velocity map ion imaging revealed fast angular oscillations in product quantum state–resolved differential cross sections in the forward scattering direction for H 2 products at specific rovibrational levels. The experimental results agree with adiabatic quantum dynamical calculations only when the GP effect is included.
    Keywords: Chemistry
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  • 12
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-17
    Keywords: Chemistry
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  • 13
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-17
    Keywords: Chemistry
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  • 14
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-17
    Description: The chemistry of the carbonyl group is essential to modern organic synthesis. The preparation of substituted, enantioenriched 1,3- or 1,5-dicarbonyls is well developed, as their disconnection naturally follows from the intrinsic polarity of the carbonyl group. By contrast, a general enantioselective access to quaternary stereocenters in acyclic 1,4-dicarbonyl systems remains an unresolved problem, despite the tremendous importance of 2,3-substituted 1,4-dicarbonyl motifs in natural products and drug scaffolds. Here we present a broad enantioselective and stereodivergent strategy to access acyclic, polysubstituted 1,4-dicarbonyls via acid-catalyzed [3,3]-sulfonium rearrangement starting from vinyl sulfoxides and ynamides. The stereochemistry at sulfur governs the absolute sense of chiral induction, whereas the double bond geometry dictates the relative configuration of the final products.
    Keywords: Chemistry
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  • 15
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-17
    Keywords: Chemistry
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  • 16
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-17
    Description: With the recent soaring production of natural gas, the use of methane and other light hydrocarbon feedstocks as starting materials in synthetic transformations is becoming increasingly economically attractive, although it remains chemically challenging. We report the development of photocatalytic C–H amination, alkylation, and arylation of methane, ethane, and higher alkanes under visible light irradiation at ambient temperature. High catalytic efficiency (turnover numbers up to 2900 for methane and 9700 for ethane) and selectivity were achieved using abundant, inexpensive cerium salts as photocatalysts. Ligand-to-metal charge transfer excitation generated alkoxy radicals from simple alcohols that in turn acted as hydrogen atom transfer catalysts. The mixed-phase gas/liquid reaction was adapted to continuous flow, enabling the efficient use of gaseous feedstocks in scalable photocatalytic transformations.
    Keywords: Chemistry
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  • 17
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-24
    Keywords: Chemistry
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  • 18
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-24
    Keywords: Chemistry
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  • 19
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-31
    Keywords: Chemistry
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  • 20
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-31
    Description: Intrigued by the potential of nanoscale machines, scientists have long attempted to control molecular motion. We monitored the individual 0.7-nanometer steps of a single molecular hopper as it moved in an electric field along a track in a nanopore controlled by a chemical ratchet. The hopper demonstrated characteristics desired in a moving molecule: defined start and end points, processivity, no chemical fuel requirement, directional motion, and external control. The hopper was readily functionalized to carry cargos. For example, a DNA molecule could be ratcheted along the track in either direction, a prerequisite for nanopore sequencing.
    Keywords: Chemistry
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  • 21
    Publication Date: 2018-09-21
    Description: Phosphorothioate nucleotides have emerged as powerful pharmacological substitutes of their native phosphodiester analogs with important translational applications in antisense oligonucleotide (ASO) therapeutics and cyclic dinucleotide (CDN) synthesis. Stereocontrolled installation of this chiral motif has long been hampered by the systemic use of phosphorus(III) [P(III)]–based reagent systems as the sole practical means of oligonucleotide assembly. A fundamentally different approach is described herein: the invention of a P(V)-based reagent platform for programmable, traceless, diastereoselective phosphorus-sulfur incorporation. The power of this reagent system is demonstrated through the robust and stereocontrolled synthesis of various nucleotidic architectures, including ASOs and CDNs, via an efficient, inexpensive, and operationally simple protocol.
    Keywords: Chemistry
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  • 22
    Publication Date: 2018-09-21
    Description: Here we report an anomalous porous molecular crystal built of C–H···N-bonded double-layered roof-floor components and wall components of a segregatively interdigitated architecture. This complicated porous structure consists of only one type of fully aromatic multijoint molecule carrying three identical dipyridylphenyl wedges. Despite its high symmetry, this molecule accomplishes difficult tasks by using two of its three wedges for roof-floor formation and using its other wedge for wall formation. Although a C–H···N bond is extremely labile, the porous crystal maintains its porosity until thermal breakdown of the C–H···N bonds at 202°C occurs, affording a nonporous polymorph. Though this nonporous crystal survives even at 325°C, it can retrieve the parent porosity under acetonitrile vapor. These findings show how one can translate simplicity into ultrahigh complexity.
    Keywords: Chemistry
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  • 23
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-09-28
    Keywords: Chemistry
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  • 24
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-09-28
    Keywords: Chemistry
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  • 25
    Publication Date: 2018-09-28
    Description: Some of the simplest and most powerful carbon-carbon bond forming strategies take advantage of readily accessible ubiquitous motifs: carbonyls and olefins. Here we report a fundamentally distinct mode of reactivity between carbonyls and olefins that differs from established acid-catalyzed carbonyl-ene, Prins, and carbonyl-olefin metathesis reaction paths. A range of epsilon, zeta-unsaturated ketones undergo Brønsted acid–catalyzed intramolecular cyclization to provide tetrahydrofluorene products via the formation of two new carbon-carbon bonds. Theoretical calculations and accompanying mechanistic studies suggest that this carbocyclization reaction proceeds through the intermediacy of a transient oxetane formed by oxygen atom transfer. The complex polycyclic frameworks in this product class appear as common substructures in organic materials, bioactive natural products, and recently developed pharmaceuticals.
    Keywords: Chemistry
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  • 26
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-09-28
    Description: Alkene aminoarylation with a single, bifunctional reagent is a concise synthetic strategy. We report a catalytic protocol for the addition of arylsulfonylacetamides across electron-rich alkenes with complete anti-Markovnikov regioselectivity and excellent diastereoselectivity to provide 2,2-diarylethylamines. In this process, single-electron alkene oxidation enables carbon-nitrogen bond formation to provide a key benzylic radical poised for a Smiles-Truce 1,5-aryl shift. This reaction is redox-neutral, exhibits broad functional group compatibility, and occurs at room temperature with loss of sulfur dioxide. As this process is driven by visible light, uses readily available starting materials, and demonstrates convergent synthesis, it is well suited for use in a variety of synthetic endeavors.
    Keywords: Chemistry
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  • 27
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-10-05
    Keywords: Chemistry
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  • 28
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-10-05
    Keywords: Chemistry
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  • 29
    Publication Date: 2018-10-05
    Description: Photocatalysis based on optically active, "plasmonic" metal nanoparticles has emerged as a promising approach to facilitate light-driven chemical conversions under far milder conditions than thermal catalysis. However, an understanding of the relation between thermal and electronic excitations has been lacking. We report the substantial light-induced reduction of the thermal activation barrier for ammonia decomposition on a plasmonic photocatalyst. We introduce the concept of a light-dependent activation barrier to account for the effect of light illumination on electronic and thermal excitations in a single unified picture. This framework provides insight into the specific role of hot carriers in plasmon-mediated photochemistry, which is critically important for designing energy-efficient plasmonic photocatalysts.
    Keywords: Chemistry
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  • 30
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-10-12
    Keywords: Chemistry
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  • 31
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-10-12
    Keywords: Chemistry
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  • 32
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-10-12
    Description: Single-electron reduction of a carbonyl to a ketyl enables access to a polarity-reversed platform of reactivity for this cornerstone functional group. However, the synthetic utility of the ketyl radical is hindered by the strong reductants necessary for its generation, which also limit its reactivity to net reductive mechanisms. We report a strategy for net redox-neutral generation and reaction of ketyl radicals. The in situ conversion of aldehydes to α-acetoxy iodides lowers their reduction potential by more than 1 volt, allowing for milder access to the corresponding ketyl radicals and an oxidative termination event. Upon subjecting these iodides to a dimanganese decacarbonyl precatalyst and visible light irradiation, an atom transfer radical addition (ATRA) mechanism affords a broad scope of vinyl iodide products with high Z -selectivity.
    Keywords: Chemistry
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  • 33
    Publication Date: 2018-10-12
    Description: Reactions that form a product with the same reactive functionality as that of one of the starting compounds frequently end in oligomerization. As a salient example, selective aldol coupling of the smallest, though arguably most useful, enolizable aldehyde, acetaldehyde, with just one partner substrate has proven to be extremely challenging. Here, we report a highly enantioselective Mukaiyama aldol reaction with the simple triethylsilyl (TES) and tert -butyldimethylsilyl (TBS) enolates of acetaldehyde and various aliphatic and aromatic acceptor aldehydes. The reaction is catalyzed by recently developed, strongly acidic imidodiphosphorimidates (IDPi), which, like enzymes, display a confined active site but, like small-molecule catalysts, have a broad substrate scope. The process is scalable, fast, efficient (0.5 to 1.5 mole % catalyst loading), and greatly simplifies access to highly valuable silylated acetaldehyde aldols.
    Keywords: Chemistry
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  • 34
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-12-21
    Keywords: Chemistry
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  • 35
    Publication Date: 2018-12-21
    Description: Single-molecule magnets (SMMs) containing only one metal center may represent the lower size limit for molecule-based magnetic information storage materials. Their current drawback is that all SMMs require liquid-helium cooling to show magnetic memory effects. We now report a chemical strategy to access the dysprosium metallocene cation [(Cp i Pr5 )Dy(Cp*)] + (Cp i Pr5 , penta-iso-propylcyclopentadienyl; Cp *, pentamethylcyclopentadienyl), which displays magnetic hysteresis above liquid-nitrogen temperatures. An effective energy barrier to reversal of the magnetization of U eff = 1541 wave number is also measured. The magnetic blocking temperature of T B = 80 kelvin for this cation overcomes an essential barrier toward the development of nanomagnet devices that function at practical temperatures.
    Keywords: Chemistry
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  • 36
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-04-29
    Description: Author: Jake Yeston
    Keywords: Chemistry
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  • 37
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-03-18
    Description: Author: Marc S. Lavine
    Keywords: Chemistry
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  • 38
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-03-18
    Description: Water plays a central role in scientific disciplines ranging from geology to astronomy to biology. Yet it is an extraordinarily dif cult liquid to understand because of its complex, ever-changing patterns of hydrogen bonds. Studies of small water clusters have provided important insights into the concerted hydrogen-bond motions that can occur in water. These studies are also crucial for developing an accurate potential function for simulating the properties of liquid water and ice (1). On page 1310 of this issue, Richardson et al. (2) provide evidence for a concerted type of motion in which two hydrogen bonds in a water cluster are broken simultaneously (see the figure). The results have implications for many areas of scientific study, including the chemistry of polar solvents, the conformations of proteins, and the dissolution of ions in minerals. Author: David C. Clary
    Keywords: Chemistry
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  • 39
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-03-18
    Description: Author: Jake Yeston
    Keywords: Chemistry
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  • 40
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2016-03-04
    Description: Lower olefins, particularly ethylene (C2H4), propylene (C3H6), and butylene (C4H8), are important intermediates in the manufacture of products such as plastics, solvents, paints, and medicines. They are produced worldwide in amounts exceeding 200 million tons per year (see the photo) (1), mostly from crude oil. More recent approaches use methanol or synthesis gas (syngas; a mixture of carbon monoxide and hydrogen) as feedstocks, but capital investments are high and/or selectivities to lower olefins limited. A bifunctional catalyst reported by Jiao et al. on page 1065 of this issue (2) enables the direct conversion of synthesis gas to lower olefins with a surprisingly high selectivity. Author: Krijn P. de Jong
    Keywords: Chemistry
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  • 41
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-10-19
    Keywords: Chemistry
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  • 42
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-10-19
    Description: The development of highly reactive and stereoselective catalytic systems is required not only to improve existing synthetic methods but also to invent distinct chemical reactions. Herein, a homogenized combination of nickel-based Lewis acid–surfactant-combined catalysts and single-walled carbon nanotubes is shown to exhibit substantial activity in water. In addition to the enhanced reactivity, stereoselective performance and long-term stability were demonstrated in asymmetric conjugate addition reactions of aldoximes to furnish chiral nitrones in high yields with excellent selectivities. The practical and straightforward application of the designed catalysts in water provides an expedient, environmentally benign, and highly efficient pathway to access optically active compounds.
    Keywords: Chemistry
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  • 43
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-11-02
    Keywords: Chemistry
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  • 44
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-12-14
    Keywords: Chemistry
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  • 45
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-10-26
    Keywords: Chemistry
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  • 46
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-11-02
    Description: Exploration of intermediates that enable chemoselective cycloaddition reactions and expeditious construction of fused- or bridged-ring systems is a continuous challenge for organic synthesis. As an intermediate of interest, the oxyallyl cation has been harnessed to synthesize architectures containing seven-membered rings via (4+3) cycloaddition. However, its potential to access five-membered skeletons is underdeveloped, largely due to the thermally forbidden (3+2) pathway. Here, the combination of a tailored precursor and a Pd(0) catalyst generates a Pd-oxyallyl intermediate that cyclizes with conjugated dienes to produce a diverse array of tetrahydrofuran skeletons. The cycloaddition overrides conventional (4+3) selectivity by proceeding through a stepwise pathway involving a Pd-allyl transfer and ring closure sequence. Subsequent treatment of the (3+2) adducts with a palladium catalyst converts the heterocycles to the carbocyclic cyclopentanones.
    Keywords: Chemistry
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  • 47
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-11-16
    Keywords: Chemistry
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  • 48
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-10
    Keywords: Chemistry
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  • 49
    Publication Date: 2018-08-10
    Description: Understanding the practical limitations of chemical reactions is critically important for efficiently planning the synthesis of compounds in pharmaceutical, agrochemical, and specialty chemical research and development. However, literature reports of the scope of new reactions are often cursory and biased toward successful results, severely limiting the ability to predict reaction outcomes for untested substrates. We herein illustrate strategies for carrying out large-scale surveys of chemical reactivity by using a material-sparing nanomole-scale automated synthesis platform with greatly expanded synthetic scope combined with ultrahigh-throughput matrix-assisted laser desorption/ionization–time-of-flight mass spectrometry (MALDI-TOF MS).
    Keywords: Chemistry
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  • 50
    Publication Date: 2018-08-24
    Description: Researchers around the world have observed the formation of molecularly ordered structures of unknown origin on the surface of titanium dioxide (TiO 2 ) photocatalysts exposed to air and solution. Using a combination of atomic-scale microscopy and spectroscopy, we show that TiO 2 selectively adsorbs atmospheric carboxylic acids that are typically present in parts-per-billion concentrations while effectively repelling other adsorbates, such as alcohols, that are present in much higher concentrations. The high affinity of the surface for carboxylic acids is attributed to their bidentate binding. These self-assembled monolayers have the unusual property of being both hydrophobic and highly water-soluble, which may contribute to the self-cleaning properties of TiO 2 . This finding is relevant to TiO 2 photocatalysis, because the self-assembled carboxylate monolayers block the undercoordinated surface cation sites typically implicated in photocatalysis.
    Keywords: Chemistry
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  • 51
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-31
    Keywords: Chemistry
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  • 52
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-08-31
    Keywords: Chemistry
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  • 53
    Publication Date: 2018-08-31
    Description: The alkaline earth metals calcium (Ca), strontium (Sr), and barium (Ba) typically engage in chemical bonding as classical main-group elements through their n s and n p valence orbitals, where n is the principal quantum number. Here we report the isolation and spectroscopic characterization of eight-coordinate carbonyl complexes M(CO) 8 (where M = Ca, Sr, or Ba) in a low-temperature neon matrix. Analysis of the electronic structure of these cubic O h -symmetric complexes reveals that the metal–carbon monoxide (CO) bonds arise mainly from [M(d )] -〉 (CO) 8 backdonation, which explains the strong observed red shift of the C-O stretching frequencies. The corresponding radical cation complexes were also prepared in gas phase and characterized by mass-selected infrared photodissociation spectroscopy, confirming adherence to the 18-electron rule more conventionally associated with transition metal chemistry.
    Keywords: Chemistry
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  • 54
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-09-07
    Keywords: Chemistry
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  • 55
    Publication Date: 2018-09-07
    Description: Mystery surrounds the transition from gas-phase hydrocarbon precursors to terrestrial soot and interstellar dust, which are carbonaceous particles formed under similar conditions. Although polycyclic aromatic hydrocarbons (PAHs) are known precursors to high-temperature carbonaceous-particle formation, the molecular pathways that initiate particle formation are unknown. We present experimental and theoretical evidence for rapid molecular clustering–reaction pathways involving radicals with extended conjugation. These radicals react with other hydrocarbon species to form covalently bound complexes that promote further growth and clustering by regenerating resonance-stabilized radicals through low-barrier hydrogen-abstraction and hydrogen-ejection reactions. Such radical–chain reaction pathways may lead to covalently bound clusters of PAHs and other hydrocarbons that would otherwise be too small to condense at high temperatures, thus providing the key mechanistic steps for rapid particle formation and surface growth by hydrocarbon chemisorption.
    Keywords: Chemistry
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  • 56
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-09-14
    Keywords: Chemistry
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  • 57
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-04-27
    Keywords: Chemistry
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  • 58
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-04-27
    Keywords: Chemistry
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  • 59
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-04-27
    Description: Basic heteroarenes are a ubiquitous feature of pharmaceuticals and bioactive molecules, and Minisci-type additions of radical nucleophiles are a leading method for their elaboration. Despite many Minisci-type protocols that result in the formation of stereocenters, exerting control over the absolute stereochemistry at these centers remains an unmet challenge. We report a process for addition of prochiral radicals, generated from amino acid derivatives, to pyridines and quinolines. Our method offers excellent control of both enantioselectivity and regioselectivity. An enantiopure chiral Brønsted acid catalyst serves both to activate the substrate and induce asymmetry, while an iridium photocatalyst mediates the required electron transfer processes. We anticipate that this method will expedite access to enantioenriched small-molecule building blocks bearing versatile basic heterocycles.
    Keywords: Chemistry
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  • 60
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-05-25
    Keywords: Chemistry
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  • 61
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-05-25
    Keywords: Chemistry
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  • 62
    Publication Date: 2018-10-26
    Description: Primary amines are essential constituents of biologically active molecules and versatile intermediates in the synthesis of drugs and agrochemicals. However, their preparation from easily accessible alkenes remains challenging. Here, we report a general strategy to access primary amines from alkenes through an operationally simple iron-catalyzed aminochlorination reaction. A stable hydroxylamine derivative and benign sodium chloride act as the respective nitrogen and chlorine sources. The reaction proceeds at room temperature under air; tolerates a large scope of aliphatic and conjugated alkenes, including densely functionalized substrates; and provides excellent anti-Markovnikov regioselectivity with respect to the amino group. The reactivity of the 2-chloroalkylamine products, an understudied class of amphoteric molecules, enables facile access to linear or branched aliphatic amines, aziridines, aminonitriles, azido amines, and homoallylic amines.
    Keywords: Chemistry
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  • 63
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-11-09
    Keywords: Chemistry
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  • 64
    Publication Date: 2018-11-09
    Description: Despite the enormous potential for the use of stereospecific cross-coupling reactions to rationally manipulate the three-dimensional structure of organic molecules, the factors that control the transfer of stereochemistry in these reactions remain poorly understood. Here we report a mechanistic and synthetic investigation into the use of enantioenriched alkylboron nucleophiles in stereospecific Pd-catalyzed Suzuki cross-coupling reactions. By developing a suite of molecular descriptors of phosphine ligands, we could apply predictive statistical models to select or design distinct ligands that respectively promoted stereoinvertive and stereoretentive cross-coupling reactions. Stereodefined branched structures were thereby accessed through the predictable manipulation of absolute stereochemistry, and a general model for the mechanism of alkylboron transmetallation was proposed.
    Keywords: Chemistry
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  • 65
    Publication Date: 2018-11-16
    Description: Heterobiaryls composed of pyridine and diazine rings are key components of pharmaceuticals and are often central to pharmacological function. We present an alternative approach to metal-catalyzed cross-coupling to make heterobiaryls using contractive phosphorus C–C couplings, also termed phosphorus ligand coupling reactions. The process starts by regioselective phosphorus substitution of the C–H bonds para to nitrogen in two successive heterocycles; ligand coupling is then triggered via acidic alcohol solutions to form the heterobiaryl bond. Mechanistic studies imply that ligand coupling is an asynchronous process involving migration of one heterocycle to the ipso position of the other around a central pentacoordinate P(V) atom. The strategy can be applied to complex drug-like molecules containing multiple reactive sites and polar functional groups, and also enables convergent coupling of drug fragments and late-stage heteroarylation of pharmaceuticals.
    Keywords: Chemistry
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  • 66
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-07-06
    Keywords: Chemistry
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  • 67
    Publication Date: 2018-07-06
    Description: Conical intersections play a critical role in excited-state dynamics of polyatomic molecules because they govern the reaction pathways of many nonadiabatic processes. However, ultrafast probes have lacked sufficient spatial resolution to image wave-packet trajectories through these intersections directly. Here, we present the simultaneous experimental characterization of one-photon and two-photon excitation channels in isolated CF 3 I molecules using ultrafast gas-phase electron diffraction. In the two-photon channel, we have mapped out the real-space trajectories of a coherent nuclear wave packet, which bifurcates onto two potential energy surfaces when passing through a conical intersection. In the one-photon channel, we have resolved excitation of both the umbrella and the breathing vibrational modes in the CF 3 fragment in multiple nuclear dimensions. These findings benchmark and validate ab initio nonadiabatic dynamics calculations.
    Keywords: Chemistry
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  • 68
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-07-13
    Keywords: Chemistry
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  • 69
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    American Association for the Advancement of Science (AAAS)
    In: Science
    Publication Date: 2018-06-22
    Keywords: Chemistry
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  • 70
    Publication Date: 2015-09-01
    Description: Glycerophospholipids, the structural components of cell membranes, have not been considered to be spatial cues for intercellular signaling because of their ubiquitous distribution. We identified lyso-phosphatidyl-beta-D-glucoside (LysoPtdGlc), a hydrophilic glycerophospholipid, and demonstrated its role in modality-specific repulsive guidance of spinal cord sensory axons. LysoPtdGlc is locally synthesized and released by radial glia in a patterned spatial distribution to regulate the targeting of nociceptive but not proprioceptive central axon projections. Library screening identified the G protein-coupled receptor GPR55 as a high-affinity receptor for LysoPtdGlc, and GPR55 deletion or LysoPtdGlc loss of function in vivo caused the misallocation of nociceptive axons into proprioceptive zones. These findings show that LysoPtdGlc/GPR55 is a lipid-based signaling system in glia-neuron communication for neural development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guy, Adam T -- Nagatsuka, Yasuko -- Ooashi, Noriko -- Inoue, Mariko -- Nakata, Asuka -- Greimel, Peter -- Inoue, Asuka -- Nabetani, Takuji -- Murayama, Akiho -- Ohta, Kunihiro -- Ito, Yukishige -- Aoki, Junken -- Hirabayashi, Yoshio -- Kamiguchi, Hiroyuki -- New York, N.Y. -- Science. 2015 Aug 28;349(6251):974-7. doi: 10.1126/science.aab3516.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉RIKEN Brain Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. ; RIKEN Brain Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. Lipid Biology Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. ; Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Sendai, Miyagi 980-8578, Japan. Japan Science and Technology Agency, Precursory Research for Embryonic Science and Technology (PRESTO), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan. ; Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan. ; Synthetic Cellular Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. ; Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Sendai, Miyagi 980-8578, Japan. Japan Agency for Medical Research and Development, Core Research for Evolutional Science and Technology (AMED-CREST), 1-7-1 Otemachi, Chiyoda, Tokyo 100-0004, Japan. ; RIKEN Brain Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. kamiguchi@brain.riken.jp hirabaya@riken.jp.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26315437" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*physiology ; Chick Embryo ; Coculture Techniques ; Ganglia, Spinal/*cytology/physiology ; Gene Knockout Techniques ; Glycerophospholipids/analysis/metabolism/*physiology ; Glycolipids/analysis/*physiology ; Mice ; Nerve Growth Factor/pharmacology ; Neuroglia/*physiology ; Nociceptors/*physiology ; Receptor, trkA/metabolism ; Receptor, trkC/metabolism ; Receptors, Cannabinoid/genetics/*physiology ; Spinal Cord/*cytology/*embryology ; Tissue Culture Techniques
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  • 71
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-12-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reczek, Colleen R -- Chandel, Navdeep S -- New York, N.Y. -- Science. 2015 Dec 11;350(6266):1317-8. doi: 10.1126/science.aad8671.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine and Robert H. Lurie Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA. ; Department of Medicine and Robert H. Lurie Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA. nav@northwestern.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26659042" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ascorbic Acid/*therapeutic use ; Colorectal Neoplasms/*drug therapy/*genetics ; Female ; Humans ; Proto-Oncogene Proteins/*genetics ; Proto-Oncogene Proteins B-raf/*genetics ; ras Proteins/*genetics
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  • 72
    Publication Date: 2015-02-28
    Description: Double-stranded RNAs (dsRNAs) targeted against essential genes can trigger a lethal RNA interference (RNAi) response in insect pests. The application of this concept in plant protection is hampered by the presence of an endogenous plant RNAi pathway that processes dsRNAs into short interfering RNAs. We found that long dsRNAs can be stably produced in chloroplasts, a cellular compartment that appears to lack an RNAi machinery. When expressed from the chloroplast genome, dsRNAs accumulated to as much as 0.4% of the total cellular RNA. Transplastomic potato plants producing dsRNAs targeted against the beta-actin gene of the Colorado potato beetle, a notorious agricultural pest, were protected from herbivory and were lethal to its larvae. Thus, chloroplast expression of long dsRNAs can provide crop protection without chemical pesticides.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Jiang -- Khan, Sher Afzal -- Hasse, Claudia -- Ruf, Stephanie -- Heckel, David G -- Bock, Ralph -- New York, N.Y. -- Science. 2015 Feb 27;347(6225):991-4. doi: 10.1126/science.1261680.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Molekulare Pflanzenphysiologie, D-14476 Potsdam-Golm, Germany. ; Max-Planck-Institut fur Chemische Okologie, D-07745 Jena, Germany. ; Max-Planck-Institut fur Molekulare Pflanzenphysiologie, D-14476 Potsdam-Golm, Germany. rbock@mpimp-golm.mpg.de.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25722411" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/*antagonists & inhibitors/genetics ; Animals ; Beetles/*genetics/pathogenicity ; Crops, Agricultural/genetics/*parasitology ; Genetic Vectors ; Pest Control, Biological/*methods ; Plant Leaves/genetics/parasitology ; Plastids/*genetics ; *RNA Interference ; RNA, Double-Stranded/*genetics ; RNA, Small Interfering/*genetics/metabolism ; Solanum tuberosum/genetics/*parasitology ; Transformation, Genetic
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  • 73
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hackett, Perry -- Carroll, Dana -- P01 HD032652/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2015 Mar 20;347(6228):1324. doi: 10.1126/science.347.6228.1324.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Cell Biology, and Development, Center for Genome Engineering, University of Minnesota, Minneapolis, MN 55455, USA. hacke004@umn.edu. ; Department of Biochemistry, School of Medicine, University of Utah, Salt Lake City, UT 84112, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25792322" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/*legislation & jurisprudence ; Animals ; *Government Regulation ; *Organisms, Genetically Modified ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 74
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-11-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dajani, Rana -- New York, N.Y. -- Science. 2015 Nov 27;350(6264):1043. doi: 10.1126/science.350.6264.1043-b.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and Biotechnology, Hashemite University, Zarqa, Jordan. rdajani@hu.edu.jo.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26612944" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Art ; Equipment Reuse ; Fibroblasts ; Gloves, Protective ; Jordan ; Laboratories ; Mice ; Recycling/*methods ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 75
    Publication Date: 2015-11-14
    Description: The RNA-guided CRISPR-associated protein Cas9 is used for genome editing, transcriptional modulation, and live-cell imaging. Cas9-guide RNA complexes recognize and cleave double-stranded DNA sequences on the basis of 20-nucleotide RNA-DNA complementarity, but the mechanism of target searching in mammalian cells is unknown. Here, we use single-particle tracking to visualize diffusion and chromatin binding of Cas9 in living cells. We show that three-dimensional diffusion dominates Cas9 searching in vivo, and off-target binding events are, on average, short-lived (〈1 second). Searching is dependent on the local chromatin environment, with less sampling and slower movement within heterochromatin. These results reveal how the bacterial Cas9 protein interrogates mammalian genomes and navigates eukaryotic chromatin structure.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knight, Spencer C -- Xie, Liangqi -- Deng, Wulan -- Guglielmi, Benjamin -- Witkowsky, Lea B -- Bosanac, Lana -- Zhang, Elisa T -- El Beheiry, Mohamed -- Masson, Jean-Baptiste -- Dahan, Maxime -- Liu, Zhe -- Doudna, Jennifer A -- Tjian, Robert -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Nov 13;350(6262):823-6. doi: 10.1126/science.aac6572.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, University of California, Berkeley, CA, USA. ; Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA. ; Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. Transcriptional Imaging Consortium, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. ; Laboratoire Physico-Chimie Curie, Institut Curie, Centre National de la Recherche Scientifique UMR 168, Paris, France. ; Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. ; Transcriptional Imaging Consortium, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. Laboratoire Physico-Chimie Curie, Institut Curie, Centre National de la Recherche Scientifique UMR 168, Paris, France. ; Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. Transcriptional Imaging Consortium, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. liuz11@janelia.hhmi.org doudna@berkeley.edu jmlim@berkeley.edu. ; Department of Chemistry, University of California, Berkeley, CA, USA. Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA. Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA. Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA. Innovative Genomics Initiative, University of California, Berkeley, CA, USA. liuz11@janelia.hhmi.org doudna@berkeley.edu jmlim@berkeley.edu. ; Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA. Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. Transcriptional Imaging Consortium, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA. Li Ka Shing Biomedical and Health Sciences Center, University of California, Berkeley, CA, USA. liuz11@janelia.hhmi.org doudna@berkeley.edu jmlim@berkeley.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26564855" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Bacterial Proteins/chemistry/*metabolism ; *CRISPR-Cas Systems ; Chromatin/chemistry/*metabolism/ultrastructure ; Clustered Regularly Interspaced Short Palindromic Repeats ; *DNA Cleavage ; Endonucleases/chemistry/*metabolism ; *Genetic Engineering ; Genome ; Mice ; Single-Cell Analysis
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  • 76
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-02-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bernstein, Rachel -- New York, N.Y. -- Science. 2015 Feb 6;347(6222):686. doi: 10.1126/science.347.6222.686. Epub 2015 Feb 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rachel Bernstein is a staf writer for Science Careers. For more on life and careers, visit www.sciencecareers.org. Send your story to SciCareerEditor@aaas.org.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25657252" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Birds ; *Career Choice ; Cooperative Behavior ; Neurobiology/*manpower
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 77
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-02-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dantzer, Ben -- New York, N.Y. -- Science. 2015 Feb 20;347(6224):822-3. doi: 10.1126/science.aaa6480.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology and Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA. dantzer@umich.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25700499" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; *Competitive Behavior ; *Ecosystem ; Female ; Male ; *Maternal Behavior ; Songbirds/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 78
    Publication Date: 2015-02-14
    Description: A new docodontan mammaliaform from the Middle Jurassic of China has skeletal features for climbing and dental characters indicative of an omnivorous diet that included plant sap. This fossil expands the range of known locomotor adaptations in docodontans to include climbing, in addition to digging and swimming. It further shows that some docodontans had a diet with a substantial herbivorous component, distinctive from the faunivorous diets previously reported in other members of this clade. This reveals a greater ecological diversity in an early mammaliaform clade at a more fundamental taxonomic level not only between major clades as previously thought.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meng, Qing-Jin -- Ji, Qiang -- Zhang, Yu-Guang -- Liu, Di -- Grossnickle, David M -- Luo, Zhe-Xi -- New York, N.Y. -- Science. 2015 Feb 13;347(6223):764-8. doi: 10.1126/science.1260879.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Beijing Museum of Natural History, Beijing 100050 China. ; Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China. ; Committee on Evolutionary Biology, The University of Chicago, Chicago, IL 60637, USA. ; Committee on Evolutionary Biology, The University of Chicago, Chicago, IL 60637, USA. Department of Organismal Biology and Anatomy, The University of Chicago, Chicago, IL 60637, USA. zxluo@uchicago.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25678661" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Feed ; Animals ; *Biodiversity ; China ; Cuspid/anatomy & histology/immunology ; *Dentition ; Forelimb/anatomy & histology/growth & development ; *Herbivory ; Incisor/anatomy & histology/growth & development ; Mammals/anatomy & histology/*classification/*growth & development ; Mandible/anatomy & histology/growth & development ; Phylogeny
    Print ISSN: 0036-8075
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  • 79
    Publication Date: 2015-05-23
    Description: Sex determination in the mosquito Aedes aegypti is governed by a dominant male-determining factor (M factor) located within a Y chromosome-like region called the M locus. Here, we show that an M-locus gene, Nix, functions as an M factor in A. aegypti. Nix exhibits persistent M linkage and early embryonic expression, two characteristics required of an M factor. Nix knockout with clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 resulted in largely feminized genetic males and the production of female isoforms of two key regulators of sexual differentiation: doublesex and fruitless. Ectopic expression of Nix resulted in genetic females with nearly complete male genitalia. Thus, Nix is both required and sufficient to initiate male development. This study provides a foundation for mosquito control strategies that convert female mosquitoes into harmless males.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hall, Andrew Brantley -- Basu, Sanjay -- Jiang, Xiaofang -- Qi, Yumin -- Timoshevskiy, Vladimir A -- Biedler, James K -- Sharakhova, Maria V -- Elahi, Rubayet -- Anderson, Michelle A E -- Chen, Xiao-Guang -- Sharakhov, Igor V -- Adelman, Zach N -- Tu, Zhijian -- AI113643/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2015 Jun 12;348(6240):1268-70. doi: 10.1126/science.aaa2850. Epub 2015 May 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Interdisciplinary PhD Program in Genetics, Bioinformatics, and Computational Biology, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA, USA. Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. ; Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. Department of Entomology, Virginia Tech, Blacksburg, VA, USA. ; Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. ; Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA. ; School of Public Health and Tropical Medicine, Southern Medical University, Guangdong, People's Republic of China. ; Interdisciplinary PhD Program in Genetics, Bioinformatics, and Computational Biology, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. Department of Entomology, Virginia Tech, Blacksburg, VA, USA. ; Interdisciplinary PhD Program in Genetics, Bioinformatics, and Computational Biology, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. Department of Entomology, Virginia Tech, Blacksburg, VA, USA. jaketu@vt.edu zachadel@vt.edu. ; Interdisciplinary PhD Program in Genetics, Bioinformatics, and Computational Biology, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA, USA. Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. jaketu@vt.edu zachadel@vt.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25999371" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*genetics/*growth & development ; Animals ; Caspase 9 ; Clustered Regularly Interspaced Short Palindromic Repeats ; Female ; Gene Knockout Techniques ; *Genes, Insect ; *Genetic Loci ; Male ; Molecular Sequence Data ; Mosquito Control/methods ; Sex Determination Processes/*genetics
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  • 80
    Publication Date: 2015-03-07
    Description: Human higher cognition is attributed to the evolutionary expansion and elaboration of the human cerebral cortex. However, the genetic mechanisms contributing to these developmental changes are poorly understood. We used comparative epigenetic profiling of human, rhesus macaque, and mouse corticogenesis to identify promoters and enhancers that have gained activity in humans. These gains are significantly enriched in modules of coexpressed genes in the cortex that function in neuronal proliferation, migration, and cortical-map organization. Gain-enriched modules also showed correlated gene expression patterns and similar transcription factor binding site enrichments in promoters and enhancers, suggesting that they are connected by common regulatory mechanisms. Our results reveal coordinated patterns of potential regulatory changes associated with conserved developmental processes during corticogenesis, providing insight into human cortical evolution.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4426903/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4426903/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reilly, Steven K -- Yin, Jun -- Ayoub, Albert E -- Emera, Deena -- Leng, Jing -- Cotney, Justin -- Sarro, Richard -- Rakic, Pasko -- Noonan, James P -- 099175/Z/12/Z/Wellcome Trust/United Kingdom -- DA023999/DA/NIDA NIH HHS/ -- F32 GM106628/GM/NIGMS NIH HHS/ -- GM094780/GM/NIGMS NIH HHS/ -- NS014841/NS/NINDS NIH HHS/ -- P30 CA016359/CA/NCI NIH HHS/ -- R01 DA023999/DA/NIDA NIH HHS/ -- R01 GM094780/GM/NIGMS NIH HHS/ -- T32 GM007223/GM/NIGMS NIH HHS/ -- Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2015 Mar 6;347(6226):1155-9. doi: 10.1126/science.1260943.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Yale School of Medicine, New Haven, CT 06510, USA. ; Kavli Institute for Neuroscience, Yale School of Medicine, New Haven, CT 06510, USA. Department of Neurobiology, Yale School of Medicine, New Haven, CT 06510, USA. ; Department of Genetics, Yale School of Medicine, New Haven, CT 06510, USA. Program in Computational Biology and Bioinformatics, Yale University, New Haven, CT 06511, USA. ; Department of Genetics, Yale School of Medicine, New Haven, CT 06510, USA. Kavli Institute for Neuroscience, Yale School of Medicine, New Haven, CT 06510, USA. Program in Computational Biology and Bioinformatics, Yale University, New Haven, CT 06511, USA. james.noonan@yale.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25745175" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cerebral Cortex/*growth & development ; Enhancer Elements, Genetic/*genetics ; *Epigenesis, Genetic ; *Evolution, Molecular ; *Gene Expression Regulation, Developmental ; Humans ; Macaca mulatta ; Mice ; Organogenesis/*genetics ; Promoter Regions, Genetic/*genetics ; Rats
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  • 81
    Publication Date: 2015-08-22
    Description: Paradigms of sustainable exploitation focus on population dynamics of prey and yields to humanity but ignore the behavior of humans as predators. We compared patterns of predation by contemporary hunters and fishers with those of other predators that compete over shared prey (terrestrial mammals and marine fishes). Our global survey (2125 estimates of annual finite exploitation rate) revealed that humans kill adult prey, the reproductive capital of populations, at much higher median rates than other predators (up to 14 times higher), with particularly intense exploitation of terrestrial carnivores and fishes. Given this competitive dominance, impacts on predators, and other unique predatory behavior, we suggest that humans function as an unsustainable "super predator," which-unless additionally constrained by managers-will continue to alter ecological and evolutionary processes globally.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Darimont, Chris T -- Fox, Caroline H -- Bryan, Heather M -- Reimchen, Thomas E -- New York, N.Y. -- Science. 2015 Aug 21;349(6250):858-60. doi: 10.1126/science.aac4249.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geography, University of Victoria, Post Office Box 1700, Station CSC, Victoria, British Columbia V8W 2Y2, Canada. Raincoast Conservation Foundation, Post Office Box 2429, Sidney, British Columbia V8L 3Y3, Canada. Hakai Institute, Post Office Box 309, Heriot Bay, British Columbia V0P 1H0, Canada. darimont@uvic.ca. ; Department of Geography, University of Victoria, Post Office Box 1700, Station CSC, Victoria, British Columbia V8W 2Y2, Canada. Raincoast Conservation Foundation, Post Office Box 2429, Sidney, British Columbia V8L 3Y3, Canada. ; Department of Geography, University of Victoria, Post Office Box 1700, Station CSC, Victoria, British Columbia V8W 2Y2, Canada. Raincoast Conservation Foundation, Post Office Box 2429, Sidney, British Columbia V8L 3Y3, Canada. Hakai Institute, Post Office Box 309, Heriot Bay, British Columbia V0P 1H0, Canada. ; Department of Biology, University of Victoria, Post Office Box 3060, Station CSC, Victoria, British Columbia V8W 2Y2, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26293961" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; *Consumer Behavior ; Ecology ; Fishes ; Humans ; Mammals/psychology ; Population Dynamics ; *Predatory Behavior ; Reproduction
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  • 82
    Publication Date: 2015-01-03
    Description: Adipocytes have been suggested to be immunologically active, but their role in host defense is unclear. We observed rapid proliferation of preadipocytes and expansion of the dermal fat layer after infection of the skin by Staphylococcus aureus. Impaired adipogenesis resulted in increased infection as seen in Zfp423(nur12) mice or in mice given inhibitors of peroxisome proliferator-activated receptor gamma. This host defense function was mediated through the production of cathelicidin antimicrobial peptide from adipocytes because cathelicidin expression was decreased by inhibition of adipogenesis, and adipocytes from Camp(-/-) mice lost the capacity to inhibit bacterial growth. Together, these findings show that the production of an antimicrobial peptide by adipocytes is an important element for protection against S. aureus infection of the skin.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4318537/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4318537/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Ling-juan -- Guerrero-Juarez, Christian F -- Hata, Tissa -- Bapat, Sagar P -- Ramos, Raul -- Plikus, Maksim V -- Gallo, Richard L -- AR052728/AR/NIAMS NIH HHS/ -- DK096828/DK/NIDDK NIH HHS/ -- GM055246/GM/NIGMS NIH HHS/ -- HHSN272201000020C/PHS HHS/ -- P01 HL107150/HL/NHLBI NIH HHS/ -- R01 AI052453/AI/NIAID NIH HHS/ -- R01 AI083358/AI/NIAID NIH HHS/ -- R01 AI116576/AI/NIAID NIH HHS/ -- R01 AR064781/AR/NIAMS NIH HHS/ -- R01 AR067273/AR/NIAMS NIH HHS/ -- R01-AR067273/AR/NIAMS NIH HHS/ -- R01AI052453/AI/NIAID NIH HHS/ -- R25 GM055246/GM/NIGMS NIH HHS/ -- T32 GM007198/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Jan 2;347(6217):67-71. doi: 10.1126/science.1260972.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Dermatology, University of California, San Diego (UCSD), La Jolla, CA 92093, USA. ; Department of Developmental and Cell Biology, Sue and Bill Gross Stem Cell Research Center, University of California, Irvine, Irvine, CA 92697, USA. Center for Complex Biological Systems, University of California, Irvine, Irvine, CA 92697, USA. ; Nomis Foundation Laboratories for Immunobiology and Microbial Pathogenesis, The Salk Institute for Biological Studies, San Diego, La Jolla, CA 92037, USA. ; Division of Dermatology, University of California, San Diego (UCSD), La Jolla, CA 92093, USA. rgallo@ucsd.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25554785" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3-L1 Cells ; Adipocytes/*immunology/microbiology ; Adipogenesis/immunology ; Animals ; Antimicrobial Cationic Peptides/immunology ; Cathelicidins/genetics/*immunology ; DNA-Binding Proteins/genetics/immunology ; Dermis/*immunology/microbiology ; Host-Pathogen Interactions/immunology ; Mice ; Mice, Mutant Strains ; Staphylococcal Skin Infections/*immunology ; Staphylococcus aureus/*immunology ; Transcription Factors/genetics/immunology
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  • 83
    Publication Date: 2015-04-11
    Description: Protein phosphorylation regulates virtually all biological processes. Although protein kinases are popular drug targets, targeting protein phosphatases remains a challenge. Here, we describe Sephin1 (selective inhibitor of a holophosphatase), a small molecule that safely and selectively inhibited a regulatory subunit of protein phosphatase 1 in vivo. Sephin1 selectively bound and inhibited the stress-induced PPP1R15A, but not the related and constitutive PPP1R15B, to prolong the benefit of an adaptive phospho-signaling pathway, protecting cells from otherwise lethal protein misfolding stress. In vivo, Sephin1 safely prevented the motor, morphological, and molecular defects of two otherwise unrelated protein-misfolding diseases in mice, Charcot-Marie-Tooth 1B, and amyotrophic lateral sclerosis. Thus, regulatory subunits of phosphatases are drug targets, a property exploited here to safely prevent two protein misfolding diseases.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4490275/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4490275/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Das, Indrajit -- Krzyzosiak, Agnieszka -- Schneider, Kim -- Wrabetz, Lawrence -- D'Antonio, Maurizio -- Barry, Nicholas -- Sigurdardottir, Anna -- Bertolotti, Anne -- 309516/European Research Council/International -- MC_U105185860/Medical Research Council/United Kingdom -- R01-NS55256/NS/NINDS NIH HHS/ -- Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2015 Apr 10;348(6231):239-42. doi: 10.1126/science.aaa4484.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK. ; Division of Genetics and Cell Biology, San Raffaele Scientific Institute, 20132 Milan, Italy. ; Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK. aberto@mrc-lmb.cam.ac.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25859045" target="_blank"〉PubMed〈/a〉
    Keywords: Amyotrophic Lateral Sclerosis/drug therapy/metabolism/pathology ; Animals ; Cells, Cultured ; Charcot-Marie-Tooth Disease/drug therapy/metabolism/pathology ; Disease Models, Animal ; Endoplasmic Reticulum Stress/drug effects ; Enzyme Inhibitors/metabolism/pharmacokinetics/*pharmacology/toxicity ; Guanabenz/*analogs & derivatives/chemical ; synthesis/metabolism/pharmacology/toxicity ; HeLa Cells ; Humans ; Mice ; Mice, Transgenic ; Molecular Targeted Therapy ; Phosphorylation ; Protein Folding ; Protein Phosphatase 1/*antagonists & inhibitors ; Proteostasis Deficiencies/*drug therapy/*prevention & control ; Signal Transduction
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  • 84
    Publication Date: 2015-08-01
    Description: Jumping on water is a unique locomotion mode found in semi-aquatic arthropods, such as water striders. To reproduce this feat in a surface tension-dominant jumping robot, we elucidated the hydrodynamics involved and applied them to develop a bio-inspired impulsive mechanism that maximizes momentum transfer to water. We found that water striders rotate the curved tips of their legs inward at a relatively low descending velocity with a force just below that required to break the water surface (144 millinewtons/meter). We built a 68-milligram at-scale jumping robotic insect and verified that it jumps on water with maximum momentum transfer. The results suggest an understanding of the hydrodynamic phenomena used by semi-aquatic arthropods during water jumping and prescribe a method for reproducing these capabilities in artificial systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koh, Je-Sung -- Yang, Eunjin -- Jung, Gwang-Pil -- Jung, Sun-Pill -- Son, Jae Hak -- Lee, Sang-Im -- Jablonski, Piotr G -- Wood, Robert J -- Kim, Ho-Young -- Cho, Kyu-Jin -- New York, N.Y. -- Science. 2015 Jul 31;349(6247):517-21. doi: 10.1126/science.aab1637. Epub 2015 Jul 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biorobotics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA. hyk@snu.ac.kr kjcho@snu.ac.kr. ; Micro Fluid Mechanics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. hyk@snu.ac.kr kjcho@snu.ac.kr. ; Biorobotics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. ; Laboratory of Behavioral Ecology and Evolution, School of Biological Sciences, Seoul National University, Seoul 151-742, Korea. ; Laboratory of Behavioral Ecology and Evolution, School of Biological Sciences, Seoul National University, Seoul 151-742, Korea. Institute of Advanced Machines and Design, Seoul National University, Seoul 151-744, Korea. ; Laboratory of Behavioral Ecology and Evolution, School of Biological Sciences, Seoul National University, Seoul 151-742, Korea. Museum and Institute of Zoology, Polish Academy of Sciences, Warsaw 00-679, Poland. ; School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA. ; Micro Fluid Mechanics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. Institute of Advanced Machines and Design, Seoul National University, Seoul 151-744, Korea. ; Biorobotics Laboratory, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Korea. Institute of Advanced Machines and Design, Seoul National University, Seoul 151-744, Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26228144" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomechanical Phenomena ; Extremities/physiology ; Heteroptera/*physiology ; Hydrodynamics ; *Locomotion ; Robotics ; Rotation ; Surface Tension ; *Water
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 85
    Publication Date: 2015-05-02
    Description: Werner syndrome (WS) is a premature aging disorder caused by WRN protein deficiency. Here, we report on the generation of a human WS model in human embryonic stem cells (ESCs). Differentiation of WRN-null ESCs to mesenchymal stem cells (MSCs) recapitulates features of premature cellular aging, a global loss of H3K9me3, and changes in heterochromatin architecture. We show that WRN associates with heterochromatin proteins SUV39H1 and HP1alpha and nuclear lamina-heterochromatin anchoring protein LAP2beta. Targeted knock-in of catalytically inactive SUV39H1 in wild-type MSCs recapitulates accelerated cellular senescence, resembling WRN-deficient MSCs. Moreover, decrease in WRN and heterochromatin marks are detected in MSCs from older individuals. Our observations uncover a role for WRN in maintaining heterochromatin stability and highlight heterochromatin disorganization as a potential determinant of human aging.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4494668/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4494668/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Weiqi -- Li, Jingyi -- Suzuki, Keiichiro -- Qu, Jing -- Wang, Ping -- Zhou, Junzhi -- Liu, Xiaomeng -- Ren, Ruotong -- Xu, Xiuling -- Ocampo, Alejandro -- Yuan, Tingting -- Yang, Jiping -- Li, Ying -- Shi, Liang -- Guan, Dee -- Pan, Huize -- Duan, Shunlei -- Ding, Zhichao -- Li, Mo -- Yi, Fei -- Bai, Ruijun -- Wang, Yayu -- Chen, Chang -- Yang, Fuquan -- Li, Xiaoyu -- Wang, Zimei -- Aizawa, Emi -- Goebl, April -- Soligalla, Rupa Devi -- Reddy, Pradeep -- Esteban, Concepcion Rodriguez -- Tang, Fuchou -- Liu, Guang-Hui -- Belmonte, Juan Carlos Izpisua -- F32 AG047770/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2015 Jun 5;348(6239):1160-3. doi: 10.1126/science.aaa1356. Epub 2015 Apr 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China. ; Biodynamic Optical Imaging Center, College of Life Sciences, Peking University, Beijing 100871, China. ; Gene Expression Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA. ; State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China. ; Diagnosis and Treatment Center for Oral Disease, the 306th Hospital of the PLA, Beijing, China. ; Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA. ; College of Life Sciences, Peking University, Beijing 100871, China. ; The Center for Anti-aging and Regenerative Medicine, Shenzhen University, Shenzhen 518060, China. ; Gene Expression Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA. Universidad Catolica San Antonio de Murcia, Campus de los Jeronimos s/n, 30107 Guadalupe, Murcia, Spain. ; Biodynamic Optical Imaging Center, College of Life Sciences, Peking University, Beijing 100871, China. Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, Beijing 100871, China. Center for Molecular and Translational Medicine (CMTM), Beijing 100101, China. Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China. ghliu@ibp.ac.cn tangfuchou@pku.edu.cn belmonte@salk.edu. ; National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China. The Center for Anti-aging and Regenerative Medicine, Shenzhen University, Shenzhen 518060, China. Center for Molecular and Translational Medicine (CMTM), Beijing 100101, China. Beijing Institute for Brain Disorders, Beijing 100069, China. ghliu@ibp.ac.cn tangfuchou@pku.edu.cn belmonte@salk.edu. ; Gene Expression Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA. ghliu@ibp.ac.cn tangfuchou@pku.edu.cn belmonte@salk.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25931448" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics/*metabolism ; Animals ; *Cell Aging ; Cell Differentiation ; Centromere/metabolism ; Chromosomal Proteins, Non-Histone/metabolism ; DNA-Binding Proteins/metabolism ; Epigenesis, Genetic ; Exodeoxyribonucleases/genetics/*metabolism ; Gene Knockout Techniques ; HEK293 Cells ; Heterochromatin/chemistry/*metabolism ; Humans ; Membrane Proteins/metabolism ; Mesenchymal Stromal Cells/*metabolism ; Methyltransferases/genetics/metabolism ; Mice ; Models, Biological ; RecQ Helicases/genetics/*metabolism ; Repressor Proteins/genetics/metabolism ; Werner Syndrome/genetics/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 86
    Publication Date: 2015-06-27
    Description: Bone morphogenetic proteins (BMPs) act in dose-dependent fashion to regulate cell fate choices in a myriad of developmental contexts. In early vertebrate and invertebrate embryos, BMPs and their antagonists establish epidermal versus central nervous system domains. In this highly conserved system, BMP antagonists mediate the neural-inductive activities proposed by Hans Spemann and Hilde Mangold nearly a century ago. BMPs distributed in gradients subsequently function as morphogens to subdivide the three germ layers into distinct territories and act to organize body axes, regulate growth, maintain stem cell niches, or signal inductively across germ layers. In this Review, we summarize the variety of mechanisms that contribute to generating reliable developmental responses to BMP gradients and other morphogen systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bier, Ethan -- De Robertis, Edward M -- NS29870/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Jun 26;348(6242):aaa5838. doi: 10.1126/science.aaa5838.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA 92095-0349, USA. ebier@ucsd.edu ederobertis@mednet.ucla.edu. ; Howard Hughes Medical Institute, University of California, Los Angeles, Los Angeles, CA 90095-1662, USA. Department of Biological Chemistry, University of California, Los Angeles, Los Angeles, CA 90095-1662, USA. ebier@ucsd.edu ederobertis@mednet.ucla.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26113727" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Body Patterning ; Bone Morphogenetic Proteins/*metabolism ; Drosophila melanogaster/embryology ; Ectoderm/embryology ; Epidermis/embryology ; Feedback, Physiological ; Neural Tube/embryology ; Xenopus/embryology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 87
    Publication Date: 2015-11-14
    Description: Climate change impacts on vertebrates have consequences for marine ecosystem structures and services. We review marine fish, mammal, turtle, and seabird responses to climate change and discuss their potential for adaptation. Direct and indirect responses are demonstrated from every ocean. Because of variation in research foci, observed responses differ among taxonomic groups (redistributions for fish, phenology for seabirds). Mechanisms of change are (i) direct physiological responses and (ii) climate-mediated predator-prey interactions. Regional-scale variation in climate-demographic functions makes range-wide population dynamics challenging to predict. The nexus of metabolism relative to ecosystem productivity and food webs appears key to predicting future effects on marine vertebrates. Integration of climate, oceanographic, ecosystem, and population models that incorporate evolutionary processes is needed to prioritize the climate-related conservation needs for these species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sydeman, William J -- Poloczanska, Elvira -- Reed, Thomas E -- Thompson, Sarah Ann -- New York, N.Y. -- Science. 2015 Nov 13;350(6262):772-7. doi: 10.1126/science.aac9874.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Farallon Institute for Advanced Ecosystem Research, Petaluma, CA 94952, USA. Bodega Marine Laboratory/University of California Davis, Bodega Bay, CA 94923, USA. wsydeman@faralloninstitute.org. ; Commonwealth Scientific and Industrial Research Organisation, Ecosciences Precinct, Brisbane QLD 4102, Australia. Global Change Institute, University of Queensland, St Lucia, Brisbane QLD 4072, Australia. ; School of Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland. ; Farallon Institute for Advanced Ecosystem Research, Petaluma, CA 94952, USA. Climate Impacts Group, University of Washington, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26564847" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aquatic Organisms ; Birds/*classification ; *Climate Change ; *Endangered Species ; Extinction, Biological ; Fishes/*classification ; Mammals/*classification ; Phylogeny ; Population Dynamics ; Seawater ; Turtles/*classification
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  • 88
    Publication Date: 2015-03-21
    Description: Analysis of single molecules in living cells has provided quantitative insights into the kinetics of fundamental biological processes; however, the dynamics of messenger RNA (mRNA) translation have yet to be addressed. We have developed a fluorescence microscopy technique that reports on the first translation events of individual mRNA molecules. This allowed us to examine the spatiotemporal regulation of translation during normal growth and stress and during Drosophila oocyte development. We have shown that mRNAs are not translated in the nucleus but translate within minutes after export, that sequestration within P-bodies regulates translation, and that oskar mRNA is not translated until it reaches the posterior pole of the oocyte. This methodology provides a framework for studying initiation of protein synthesis on single mRNAs in living cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4451088/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4451088/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Halstead, James M -- Lionnet, Timothee -- Wilbertz, Johannes H -- Wippich, Frank -- Ephrussi, Anne -- Singer, Robert H -- Chao, Jeffrey A -- EB013571/EB/NIBIB NIH HHS/ -- GM57071/GM/NIGMS NIH HHS/ -- NS83085/NS/NINDS NIH HHS/ -- R01 EB013571/EB/NIBIB NIH HHS/ -- R01 GM057071/GM/NIGMS NIH HHS/ -- R01 NS083085/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Mar 20;347(6228):1367-671. doi: 10.1126/science.aaa3380.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute for Biomedical Research, CH-4058 Basel, Switzerland. ; Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, Bronx, NY 10461, USA. Gruss-Lipper Biophotonics Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA. Transcription Imaging Consortium, Howard Hughes Medical Institute Janelia Farm Research Campus, Ashburn, VA 20147, USA. ; Friedrich Miescher Institute for Biomedical Research, CH-4058 Basel, Switzerland. University of Basel, CH-4003 Basel, Switzerland. ; Developmental Biology Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany. ; Developmental Biology Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany. ephrussi@embl.de robert.singer@einstein.yu.edu jeffrey.chao@fmi.ch. ; Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, Bronx, NY 10461, USA. Gruss-Lipper Biophotonics Center, Albert Einstein College of Medicine, Bronx, NY 10461, USA. Transcription Imaging Consortium, Howard Hughes Medical Institute Janelia Farm Research Campus, Ashburn, VA 20147, USA. ephrussi@embl.de robert.singer@einstein.yu.edu jeffrey.chao@fmi.ch. ; Friedrich Miescher Institute for Biomedical Research, CH-4058 Basel, Switzerland. Department of Anatomy and Structural Biology, Albert Einstein College of Medicine, Bronx, NY 10461, USA. ephrussi@embl.de robert.singer@einstein.yu.edu jeffrey.chao@fmi.ch.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25792328" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; *Biosensing Techniques ; Cell Nucleus/metabolism ; Cytosol/metabolism ; Drosophila Proteins/biosynthesis/genetics ; Drosophila melanogaster/cytology/growth & development/metabolism ; Microscopy, Fluorescence/methods ; Molecular Imaging/*methods ; Oocytes/growth & development/metabolism ; *Peptide Chain Initiation, Translational ; RNA, Messenger/*chemistry/*metabolism
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  • 89
    Publication Date: 2015-06-13
    Description: Agents that promote tissue regeneration could be beneficial in a variety of clinical settings, such as stimulating recovery of the hematopoietic system after bone marrow transplantation. Prostaglandin PGE2, a lipid signaling molecule that supports expansion of several types of tissue stem cells, is a candidate therapeutic target for promoting tissue regeneration in vivo. Here, we show that inhibition of 15-hydroxyprostaglandin dehydrogenase (15-PGDH), a prostaglandin-degrading enzyme, potentiates tissue regeneration in multiple organs in mice. In a chemical screen, we identify a small-molecule inhibitor of 15-PGDH (SW033291) that increases prostaglandin PGE2 levels in bone marrow and other tissues. SW033291 accelerates hematopoietic recovery in mice receiving a bone marrow transplant. The same compound also promotes tissue regeneration in mouse models of colon and liver injury. Tissues from 15-PGDH knockout mice demonstrate similar increased regenerative capacity. Thus, 15-PGDH inhibition may be a valuable therapeutic strategy for tissue regeneration in diverse clinical contexts.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4481126/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4481126/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Yongyou -- Desai, Amar -- Yang, Sung Yeun -- Bae, Ki Beom -- Antczak, Monika I -- Fink, Stephen P -- Tiwari, Shruti -- Willis, Joseph E -- Williams, Noelle S -- Dawson, Dawn M -- Wald, David -- Chen, Wei-Dong -- Wang, Zhenghe -- Kasturi, Lakshmi -- Larusch, Gretchen A -- He, Lucy -- Cominelli, Fabio -- Di Martino, Luca -- Djuric, Zora -- Milne, Ginger L -- Chance, Mark -- Sanabria, Juan -- Dealwis, Chris -- Mikkola, Debra -- Naidoo, Jacinth -- Wei, Shuguang -- Tai, Hsin-Hsiung -- Gerson, Stanton L -- Ready, Joseph M -- Posner, Bruce -- Willson, James K V -- Markowitz, Sanford D -- 1P01CA95471-09/CA/NCI NIH HHS/ -- 5P30 CA142543-03/CA/NCI NIH HHS/ -- P01 CA095471/CA/NCI NIH HHS/ -- P30 CA043703/CA/NCI NIH HHS/ -- P30 CA142543/CA/NCI NIH HHS/ -- P30 DK020572/DK/NIDDK NIH HHS/ -- P30 DK097948/DK/NIDDK NIH HHS/ -- P50 CA130810/CA/NCI NIH HHS/ -- P50 CA150964/CA/NCI NIH HHS/ -- R01 CA127590/CA/NCI NIH HHS/ -- R25 CA148052/CA/NCI NIH HHS/ -- R25CA148052/CA/NCI NIH HHS/ -- U54 HL119810/HL/NHLBI NIH HHS/ -- U54HL119810/HL/NHLBI NIH HHS/ -- UL1 TR000439/TR/NCATS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Jun 12;348(6240):aaa2340. doi: 10.1126/science.aaa2340.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA. ; Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA. Department of Gastroenterology, Haeundae Paik Hospital, Inje University, Busan 612896, South Korea. ; Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA. Department of Surgery, Busan Paik Hospital, and Paik Institute of Clinical Research and Ocular Neovascular Research Center, Inje University, Busan, South Korea. ; Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. ; Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA. Case Medical Center, University Hospitals of Cleveland, Cleveland, OH 44106, USA. ; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA. Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA. Case Medical Center, University Hospitals of Cleveland, Cleveland, OH 44106, USA. ; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA. Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA. ; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA. Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, USA. ; Department of Family Medicine, University of Michigan, Ann Arbor MI 48109, USA. ; Department of Pharmacology, Vanderbilt University, Nashville, TN 37232, USA. ; Proteomics Center, Case Western Reserve University, Cleveland, OH 44106, USA. ; Department of Surgery, Case Western Reserve University, Cleveland, OH 44106, USA. Case Medical Center, University Hospitals of Cleveland, Cleveland, OH 44106, USA. ; Department of Pharmacology, Case Western Reserve University, Cleveland, OH 44106, USA. ; College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA. ; Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA. Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA. Case Medical Center, University Hospitals of Cleveland, Cleveland, OH 44106, USA. sxm10@cwru.edu james.willson@utsouthwestern.edu slg5@cwru.edu joseph.ready@utsouthwestern.edu bruce.posner@utsouthwestern.edu. ; Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. Simmons Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. sxm10@cwru.edu james.willson@utsouthwestern.edu slg5@cwru.edu joseph.ready@utsouthwestern.edu bruce.posner@utsouthwestern.edu. ; Simmons Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. sxm10@cwru.edu james.willson@utsouthwestern.edu slg5@cwru.edu joseph.ready@utsouthwestern.edu bruce.posner@utsouthwestern.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26068857" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow Transplantation ; Colitis/enzymology/prevention & control ; Dinoprostone/metabolism ; Enzyme Inhibitors/chemistry/pharmacology ; Hematopoiesis/drug effects ; Hydroxyprostaglandin Dehydrogenases/antagonists & inhibitors/genetics/*physiology ; Liver Regeneration/drug effects ; Mice ; Mice, Knockout ; Prostaglandins/*metabolism ; Pyridines/chemistry/pharmacology ; Regeneration/drug effects/genetics/*physiology ; Thiophenes/chemistry/pharmacology
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  • 90
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-05-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bilbe, Graeme -- New York, N.Y. -- Science. 2015 May 29;348(6238):974-6. doi: 10.1126/science.aaa3683. Epub 2015 May 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Drugs for Neglected Diseases Initiative, 15 Chemin Louis Dunant, 1202 Geneva, Switzerland. gbilbe@dndi.org.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26023124" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antiprotozoal Agents/adverse effects/*chemistry/therapeutic use ; Chagas Disease/drug therapy/transmission ; Disease Models, Animal ; *Drug Design ; Euglenozoa Infections/*drug therapy/transmission ; Humans ; Kinetoplastida/*drug effects ; Leishmaniasis/drug therapy/transmission ; Mice ; Neglected Diseases/*drug therapy ; Trypanosoma cruzi/drug effects ; Trypanosomiasis, African/drug therapy/transmission
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  • 91
    Publication Date: 2015-06-13
    Description: During rest, brain activity is synchronized between different regions widely distributed throughout the brain, forming functional networks. However, the molecular mechanisms supporting functional connectivity remain undefined. We show that functional brain networks defined with resting-state functional magnetic resonance imaging can be recapitulated by using measures of correlated gene expression in a post mortem brain tissue data set. The set of 136 genes we identify is significantly enriched for ion channels. Polymorphisms in this set of genes significantly affect resting-state functional connectivity in a large sample of healthy adolescents. Expression levels of these genes are also significantly associated with axonal connectivity in the mouse. The results provide convergent, multimodal evidence that resting-state functional networks correlate with the orchestrated activity of dozens of genes linked to ion channel activity and synaptic function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Richiardi, Jonas -- Altmann, Andre -- Milazzo, Anna-Clare -- Chang, Catie -- Chakravarty, M Mallar -- Banaschewski, Tobias -- Barker, Gareth J -- Bokde, Arun L W -- Bromberg, Uli -- Buchel, Christian -- Conrod, Patricia -- Fauth-Buhler, Mira -- Flor, Herta -- Frouin, Vincent -- Gallinat, Jurgen -- Garavan, Hugh -- Gowland, Penny -- Heinz, Andreas -- Lemaitre, Herve -- Mann, Karl F -- Martinot, Jean-Luc -- Nees, Frauke -- Paus, Tomas -- Pausova, Zdenka -- Rietschel, Marcella -- Robbins, Trevor W -- Smolka, Michael N -- Spanagel, Rainer -- Strohle, Andreas -- Schumann, Gunter -- Hawrylycz, Mike -- Poline, Jean-Baptiste -- Greicius, Michael D -- IMAGEN consortium -- 93558/Medical Research Council/United Kingdom -- R01 MH085772-01A1/MH/NIMH NIH HHS/ -- R01NS073498/NS/NINDS NIH HHS/ -- U54 EB020403/EB/NIBIB NIH HHS/ -- Department of Health/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2015 Jun 12;348(6240):1241-4. doi: 10.1126/science.1255905. Epub 2015 Jun 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Functional Imaging in Neuropsychiatric Disorders Laboratory, Department of Neurology and Neurological Sciences, Stanford University, Stanford, CA, USA. Laboratory of Neurology and Imaging of Cognition, Department of Neuroscience, University of Geneva, Geneva, Switzerland. jonas.richiardi@unige.ch greicius@stanford.edu. ; Functional Imaging in Neuropsychiatric Disorders Laboratory, Department of Neurology and Neurological Sciences, Stanford University, Stanford, CA, USA. ; The War Related Illness and Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA. Functional Imaging in Neuropsychiatric Disorders Laboratory, Department of Neurology and Neurological Sciences, Stanford University, Stanford, CA, USA. ; Advanced MRI Section, Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA. ; Cerebral Imaging Centre, Douglas Mental Health University Institute, Montreal, Canada. Departments of Psychiatry and Biomedical Engineering, McGill University, Montreal, Canada. ; Department of Child and Adolescent Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany. ; Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK. ; Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland. ; Universitaetsklinikum Hamburg Eppendorf, Hamburg, Germany. ; Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK. Department of Psychiatry, Universite de Montreal, Centre Hospitalier Universitaire (CHU) Ste Justine Hospital, Montreal, Canada. ; Department of Addictive Behaviour and Addiction Medicine, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany. ; Department of Cognitive and Clinical Neuroscience, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany. ; Neurospin, Commissariat a l'Energie Atomique et aux Energies Alternatives, Paris, France. ; Department of Psychiatry and Psychotherapy, Campus Charite Mitte, Charite-Universitatsmedizin Berlin, Berlin, Germany. ; Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland. Departments of Psychiatry and Psychology, University of Vermont, Burlington, VT, USA. ; School of Physics and Astronomy, University of Nottingham, Nottingham, UK. ; Institut National de la Sante et de la Recherche Medicale, INSERM Unit 1000 "Neuroimaging and Psychiatry," University Paris Sud, Orsay, France. INSERM Unit 1000 at Maison de Solenn, Assistance Publique Hopitaux de Paris (APHP), Cochin Hospital, University Paris Descartes, Sorbonne Paris Cite, Paris, France. ; Rotman Research Institute, University of Toronto, Toronto, Canada. School of Psychology, University of Nottingham, Nottingham, UK. ; The Hospital for Sick Children, University of Toronto, Toronto, Canada. ; Department of Genetic Epidemiology in Psychiatry, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany. ; Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Cambridge, UK. ; Department of Psychiatry and Psychotherapy, and Neuroimaging Center, Technische Universitat Dresden, Dresden, Germany. ; Department of Psychopharmacology, Central Institute of Mental Health, Faculty of Clinical Medicine Mannheim, Mannheim, Germany. ; Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK. Medical Research Council (MRC) Social, Genetic and Developmental Psychiatry (SGDP) Centre, London, UK. ; Allen Institute for Brain Science, Seattle, WA, USA. ; Helen Wills Neuroscience Institute, University of California Berkeley, Berkeley, CA, USA. ; Functional Imaging in Neuropsychiatric Disorders Laboratory, Department of Neurology and Neurological Sciences, Stanford University, Stanford, CA, USA. jonas.richiardi@unige.ch greicius@stanford.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26068849" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Animals ; Brain/metabolism/*physiology ; Female ; Gene Expression ; Humans ; Ion Channels/*genetics ; Magnetic Resonance Imaging ; Male ; Mice ; Nerve Net/metabolism/*physiology ; Neural Pathways/metabolism/physiology ; Polymorphism, Genetic ; Rest/*physiology ; Synapses/metabolism/physiology ; *Transcriptome ; Young Adult
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  • 92
    Publication Date: 2015-01-17
    Description: The physiological and biomechanical requirements of flight at high altitude have been the subject of much interest. Here, we uncover a steep relation between heart rate and wingbeat frequency (raised to the exponent 3.5) and estimated metabolic power and wingbeat frequency (exponent 7) of migratory bar-headed geese. Flight costs increase more rapidly than anticipated as air density declines, which overturns prevailing expectations that this species should maintain high-altitude flight when traversing the Himalayas. Instead, a "roller coaster" strategy, of tracking the underlying terrain and discarding large altitude gains only to recoup them later in the flight with occasional benefits from orographic lift, is shown to be energetically advantageous for flights over the Himalayas.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bishop, C M -- Spivey, R J -- Hawkes, L A -- Batbayar, N -- Chua, B -- Frappell, P B -- Milsom, W K -- Natsagdorj, T -- Newman, S H -- Scott, G R -- Takekawa, J Y -- Wikelski, M -- Butler, P J -- BB/FO15615/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2015 Jan 16;347(6219):250-4. doi: 10.1126/science.1258732.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Biological Sciences, Bangor University, Bangor, Gwynedd, UK. ; School of Biological Sciences, Bangor University, Bangor, Gwynedd, UK. c.bishop@bangor.ac.uk l.hawkes@exeter.ac.uk. ; Wildlife Science and Conservation Center of Mongolia, Ulaanbataar, Mongolia. ; Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada. ; Office of the Dean of Graduate Research, University of Tasmania, Tasmania, Australia. ; Mongolian Academy of Sciences, Ulaanbataar, Mongolia. ; Emergency Prevention System(EMPRES) Wildlife and Ecology Unit, Food and Agriculture Organization of the United Nations (FAO), Rome, Italy. ; Department of Biology, McMaster University, Ontario, Ontario, Canada. ; San Francisco Bay Estuary Field Station, Western Ecological Research Center, U.S. Geological Survey, Vallejo, CA 94592 USA. ; Max Planck Institut fur Ornithologie, Radolfzell, Germany. Department of Biology, University of Konstanz, Konstanz, Germany. ; School of Biosciences, University of Birmingham, Birmingham, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25593180" target="_blank"〉PubMed〈/a〉
    Keywords: *Altitude ; *Animal Migration ; Animals ; Biomechanical Phenomena ; Body Temperature ; Body Weight ; *Energy Metabolism ; Flight, Animal/*physiology ; Geese/*physiology ; Heart Rate ; Tibet ; Wings, Animal/*physiology
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  • 93
    Publication Date: 2015-06-06
    Description: Circadian and metabolic physiology are intricately intertwined, as illustrated by Rev-erbalpha, a transcription factor (TF) that functions both as a core repressive component of the cell-autonomous clock and as a regulator of metabolic genes. Here, we show that Rev-erbalpha modulates the clock and metabolism by different genomic mechanisms. Clock control requires Rev-erbalpha to bind directly to the genome at its cognate sites, where it competes with activating ROR TFs. By contrast, Rev-erbalpha regulates metabolic genes primarily by recruiting the HDAC3 co-repressor to sites to which it is tethered by cell type-specific transcription factors. Thus, direct competition between Rev-erbalpha and ROR TFs provides a universal mechanism for self-sustained control of the molecular clock across all tissues, whereas Rev-erbalpha uses lineage-determining factors to convey a tissue-specific epigenomic rhythm that regulates metabolism tailored to the specific need of that tissue.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4613749/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4613749/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Yuxiang -- Fang, Bin -- Emmett, Matthew J -- Damle, Manashree -- Sun, Zheng -- Feng, Dan -- Armour, Sean M -- Remsberg, Jarrett R -- Jager, Jennifer -- Soccio, Raymond E -- Steger, David J -- Lazar, Mitchell A -- F30 DK104513/DK/NIDDK NIH HHS/ -- F32 DK102284/DK/NIDDK NIH HHS/ -- K08 DK094968/DK/NIDDK NIH HHS/ -- P30 DK019525/DK/NIDDK NIH HHS/ -- P30 DK050306/DK/NIDDK NIH HHS/ -- P30 DK19525/DK/NIDDK NIH HHS/ -- R00 DK099443/DK/NIDDK NIH HHS/ -- R01 DK045586/DK/NIDDK NIH HHS/ -- R01 DK098542/DK/NIDDK NIH HHS/ -- R01 DK45586/DK/NIDDK NIH HHS/ -- T32 GM0008275/GM/NIGMS NIH HHS/ -- T32 GM008275/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Jun 26;348(6242):1488-92. doi: 10.1126/science.aab3021. Epub 2015 Jun 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Department of Genetics, and the Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. ; Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Department of Genetics, and the Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. Department of Molecular and Cellular Biology, Division of Diabetes, Endocrinology and Metabolism, Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA. ; Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Department of Genetics, and the Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. lazar@mail.med.upenn.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26044300" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CLOCK Proteins/*genetics ; Circadian Clocks/*genetics ; Circadian Rhythm/*genetics ; *Gene Expression Regulation ; Hepatocyte Nuclear Factor 6/metabolism ; Histone Deacetylases/*metabolism ; Lipid Metabolism/genetics ; Liver/metabolism ; Male ; Metabolism/*genetics ; Mice, Inbred C57BL ; Mice, Knockout ; Nuclear Receptor Subfamily 1, Group D, Member 1/genetics/*metabolism ; Nuclear Receptor Subfamily 1, Group F, Member 1/metabolism ; Organ Specificity ; Protein Binding ; Tissue Distribution
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  • 94
    Publication Date: 2015-09-01
    Description: The global biogeography of microorganisms remains largely unknown, in contrast to the well-studied diversity patterns of macroorganisms. We used arbuscular mycorrhizal (AM) fungus DNA from 1014 plant-root samples collected worldwide to determine the global distribution of these plant symbionts. We found that AM fungal communities reflected local environmental conditions and the spatial distance between sites. However, despite AM fungi apparently possessing limited dispersal ability, we found 93% of taxa on multiple continents and 34% on all six continents surveyed. This contrasts with the high spatial turnover of other fungal taxa and with the endemism displayed by plants at the global scale. We suggest that the biogeography of AM fungi is driven by unexpectedly efficient dispersal, probably via both abiotic and biotic vectors, including humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davison, J -- Moora, M -- Opik, M -- Adholeya, A -- Ainsaar, L -- Ba, A -- Burla, S -- Diedhiou, A G -- Hiiesalu, I -- Jairus, T -- Johnson, N C -- Kane, A -- Koorem, K -- Kochar, M -- Ndiaye, C -- Partel, M -- Reier, U -- Saks, U -- Singh, R -- Vasar, M -- Zobel, M -- New York, N.Y. -- Science. 2015 Aug 28;349(6251):970-3. doi: 10.1126/science.aab1161.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia. ; Centre for Mycorrhizal Research, The Energy and Resources Institute (TERI), India Habitat Centre, Lodhi Road, New Delhi 110 003, India. ; Laboratoire des Symbioses Tropicales et Mediterraneennes, Unite Mixte de Recherche 113, Laboratoire de Biologie et Physiologie Vegetales, Faculte des Sciences Exactes et Naturelles, Universite des Antilles, BP 592, 97159, Pointe-a-Pitre, Guadeloupe (French West Indies). ; Laboratoire Commun de Microbiologie de l'Institut de Recherche pour le Developpement-Institut Senegalais de Recherches Agricoles-Universite Cheikh Anta Diop (UCAD), Departement de Biologie Vegetale, UCAD, BP 5005 Dakar, Senegal. ; Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia. Institute of Botany, Czech Academy of Sciences, Dukelska 135, 379 01 Trebon, Czech Republic. ; School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ 86011-5694, USA. ; Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, Tartu 51005, Estonia. Netherlands Institute of Ecology, Droevendaalsesteeg 10, 6708 PB Wageningen, Netherlands. ; TERI-Deakin Nano Biotechnology Centre, Biotechnology and Management of Bioresources Division, TERI, India Habitat Centre, Lodhi Road, New Delhi 110 003, India.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26315436" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biodiversity ; DNA, Fungal/analysis ; *Ecosystem ; Environment ; Humans ; *Mycorrhizae/genetics/isolation & purification/physiology ; Phylogeny ; Phylogeography ; Plant Roots/*microbiology ; *Symbiosis ; Water ; Wind
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  • 95
    Publication Date: 2015-05-16
    Description: PIWI-interacting RNAs (piRNAs) protect the animal germ line by silencing transposons. Primary piRNAs, generated from transcripts of genomic transposon "junkyards" (piRNA clusters), are amplified by the "ping-pong" pathway, yielding secondary piRNAs. We report that secondary piRNAs, bound to the PIWI protein Ago3, can initiate primary piRNA production from cleaved transposon RNAs. The first ~26 nucleotides (nt) of each cleaved RNA becomes a secondary piRNA, but the subsequent ~26 nt become the first in a series of phased primary piRNAs that bind Piwi, allowing piRNAs to spread beyond the site of RNA cleavage. The ping-pong pathway increases only the abundance of piRNAs, whereas production of phased primary piRNAs from cleaved transposon RNAs adds sequence diversity to the piRNA pool, allowing adaptation to changes in transposon sequence.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4545291/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4545291/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Han, Bo W -- Wang, Wei -- Li, Chengjian -- Weng, Zhiping -- Zamore, Phillip D -- GM62862/GM/NIGMS NIH HHS/ -- GM65236/GM/NIGMS NIH HHS/ -- HG007000/HG/NHGRI NIH HHS/ -- R01 GM065236/GM/NIGMS NIH HHS/ -- R37 GM062862/GM/NIGMS NIH HHS/ -- U41 HG007000/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 May 15;348(6236):817-21. doi: 10.1126/science.aaa1264.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉RNA Therapeutics Institute, Howard Hughes Medical Institute, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. ; RNA Therapeutics Institute, Howard Hughes Medical Institute, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Program in Bioinformatics and Integrative Biology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. ; Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Program in Bioinformatics and Integrative Biology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. zhiping.weng@umassmed.edu phillip.zamore@umassmed.edu. ; RNA Therapeutics Institute, Howard Hughes Medical Institute, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 368 Plantation Street, Worcester, MA 01605, USA. zhiping.weng@umassmed.edu phillip.zamore@umassmed.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25977554" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Argonaute Proteins/genetics/*metabolism ; Drosophila Proteins/genetics/*metabolism ; Drosophila melanogaster/genetics/*metabolism ; Endoribonucleases/genetics/*metabolism ; Female ; Germ Cells/metabolism ; Male ; Metabolic Networks and Pathways ; Mice ; Ovary/metabolism ; Peptide Initiation Factors/genetics/*metabolism ; *RNA Cleavage ; RNA, Guide/*metabolism ; RNA, Small Interfering/biosynthesis/*metabolism ; *Retroelements ; Testis/metabolism
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  • 96
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-01-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Han, Shuo -- Brunet, Anne -- New York, N.Y. -- Science. 2015 Jan 2;347(6217):32-3. doi: 10.1126/science.aaa4565.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Stanford University, Stanford, CA 94035, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25554778" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/*physiology ; Caenorhabditis elegans Proteins/*metabolism ; Longevity/*physiology ; Lysosomes/*metabolism ; Molecular Chaperones/*metabolism
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  • 97
    Publication Date: 2015-08-15
    Description: Human vocal development occurs through two parallel interactive processes that transform infant cries into more mature vocalizations, such as cooing sounds and babbling. First, natural categories of sounds change as the vocal apparatus matures. Second, parental vocal feedback sensitizes infants to certain features of those sounds, and the sounds are modified accordingly. Paradoxically, our closest living ancestors, nonhuman primates, are thought to undergo few or no production-related acoustic changes during development, and any such changes are thought to be impervious to social feedback. Using early and dense sampling, quantitative tracking of acoustic changes, and biomechanical modeling, we showed that vocalizations in infant marmoset monkeys undergo dramatic changes that cannot be solely attributed to simple consequences of growth. Using parental interaction experiments, we found that contingent parental feedback influences the rate of vocal development. These findings overturn decades-old ideas about primate vocalizations and show that marmoset monkeys are a compelling model system for early vocal development in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Takahashi, D Y -- Fenley, A R -- Teramoto, Y -- Narayanan, D Z -- Borjon, J I -- Holmes, P -- Ghazanfar, A A -- New York, N.Y. -- Science. 2015 Aug 14;349(6249):734-8. doi: 10.1126/science.aab1058.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Princeton Neuroscience Institute, Princeton University, Princeton, NJ 08544, USA. Department of Psychology, Princeton University, Princeton, NJ 08544, USA. ; Princeton Neuroscience Institute, Princeton University, Princeton, NJ 08544, USA. ; Princeton Neuroscience Institute, Princeton University, Princeton, NJ 08544, USA. Department of Mechanical and Aerospace Engineering and Program in Applied and Computational Mathematics, Princeton University, Princeton, NJ 08544, USA. ; Princeton Neuroscience Institute, Princeton University, Princeton, NJ 08544, USA. Department of Psychology, Princeton University, Princeton, NJ 08544, USA. Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26273055" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustics ; Animals ; Biomechanical Phenomena ; Callithrix/*growth & development/physiology/psychology ; Female ; Male ; Models, Biological ; Muscle Tonus ; Vocal Cords/growth & development/physiology ; *Vocalization, Animal
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  • 98
    Publication Date: 2015-11-21
    Description: Infection with intestinal helminths results in immunological changes that influence co-infections, and might influence fecundity by inducing immunological states affecting conception and pregnancy. We investigated associations between intestinal helminths and fertility in women, using 9 years of longitudinal data from 986 Bolivian forager-horticulturalists, experiencing natural fertility and 70% helminth prevalence. We found that different species of helminth are associated with contrasting effects on fecundity. Infection with roundworm (Ascaris lumbricoides) is associated with earlier first births and shortened interbirth intervals, whereas infection with hookworm is associated with delayed first pregnancy and extended interbirth intervals. Thus, helminths may have important effects on human fertility that reflect physiological and immunological consequences of infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blackwell, Aaron D -- Tamayo, Marilyne A -- Beheim, Bret -- Trumble, Benjamin C -- Stieglitz, Jonathan -- Hooper, Paul L -- Martin, Melanie -- Kaplan, Hillard -- Gurven, Michael -- P01AG022500/AG/NIA NIH HHS/ -- R01AG024119/AG/NIA NIH HHS/ -- R56AG024119/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2015 Nov 20;350(6263):970-2. doi: 10.1126/science.aac7902.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anthropology, University of California Santa Barbara, CA 93106, USA. Tsimane Health and Life History Project, San Borja, Bolivia. Broom Center for Demography, University of California Santa Barbara, CA 93106, USA. blackwell@anth.ucsb.edu. ; Department of Anthropology, University of Missouri, Columbia, MO 65211, USA. ; Tsimane Health and Life History Project, San Borja, Bolivia. Department of Anthropology, University of New Mexico, Albuquerque, NM 87131, USA. ; Department of Anthropology, University of California Santa Barbara, CA 93106, USA. Tsimane Health and Life History Project, San Borja, Bolivia. Broom Center for Demography, University of California Santa Barbara, CA 93106, USA. Center for Evolutionary Medicine, Arizona State University, Tempe, AZ 85287, USA. School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA. ; Tsimane Health and Life History Project, San Borja, Bolivia. Department of Anthropology, University of New Mexico, Albuquerque, NM 87131, USA. Institute for Advanced Study in Toulouse, Toulouse, France. ; Tsimane Health and Life History Project, San Borja, Bolivia. Department of Anthropology, Emory University, Atlanta, GA 30322, USA. ; Department of Anthropology, University of California Santa Barbara, CA 93106, USA. Tsimane Health and Life History Project, San Borja, Bolivia. Broom Center for Demography, University of California Santa Barbara, CA 93106, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26586763" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Animals ; Ascariasis/epidemiology/immunology ; Ascaris lumbricoides/immunology ; Bolivia/epidemiology ; Coinfection ; Female ; Fertility/*immunology/physiology ; Gravidity/*immunology/physiology ; Helminthiasis/*immunology ; Humans ; Intestinal Diseases, Parasitic/epidemiology/*immunology ; Pregnancy ; Prevalence ; Young Adult
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  • 99
    Publication Date: 2015-04-18
    Description: Dermal fibroblasts represent a heterogeneous population of cells with diverse features that remain largely undefined. We reveal the presence of at least two fibroblast lineages in murine dorsal skin. Lineage tracing and transplantation assays demonstrate that a single fibroblast lineage is responsible for the bulk of connective tissue deposition during embryonic development, cutaneous wound healing, radiation fibrosis, and cancer stroma formation. Lineage-specific cell ablation leads to diminished connective tissue deposition in wounds and reduces melanoma growth. Using flow cytometry, we identify CD26/DPP4 as a surface marker that allows isolation of this lineage. Small molecule-based inhibition of CD26/DPP4 enzymatic activity during wound healing results in diminished cutaneous scarring. Identification and isolation of these lineages hold promise for translational medicine aimed at in vivo modulation of fibrogenic behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rinkevich, Yuval -- Walmsley, Graham G -- Hu, Michael S -- Maan, Zeshaan N -- Newman, Aaron M -- Drukker, Micha -- Januszyk, Michael -- Krampitz, Geoffrey W -- Gurtner, Geoffrey C -- Lorenz, H Peter -- Weissman, Irving L -- Longaker, Michael T -- GM07365/GM/NIGMS NIH HHS/ -- R01 GM087609/GM/NIGMS NIH HHS/ -- U01 HL099776/HL/NHLBI NIH HHS/ -- U01 HL099999/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2015 Apr 17;348(6232):aaa2151. doi: 10.1126/science.aaa2151.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Stem Cell Biology and Regenerative Medicine, Departments of Pathology and Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA. ryuval@stanford.edu irv@stanford.edu longaker@stanford.edu. ; Institute for Stem Cell Biology and Regenerative Medicine, Departments of Pathology and Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA. Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA. ; Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA. ; Institute for Stem Cell Biology and Regenerative Medicine, Departments of Pathology and Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA. ; Institute for Stem Cell Biology and Regenerative Medicine, Departments of Pathology and Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA. Ludwig Center for Cancer Stem Cell Biology and Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. ryuval@stanford.edu irv@stanford.edu longaker@stanford.edu. ; Institute for Stem Cell Biology and Regenerative Medicine, Departments of Pathology and Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA. Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA. ryuval@stanford.edu irv@stanford.edu longaker@stanford.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25883361" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Lineage/genetics ; Cell Separation/*methods ; Cicatrix/metabolism/*pathology ; Disease Models, Animal ; Embryonic Development ; Embryonic Stem Cells/cytology ; Fibroblasts/cytology/pathology/*physiology ; Gene Expression ; Homeodomain Proteins/genetics ; Mice ; Mouth/injuries/pathology/surgery ; Skin/injuries/*pathology ; Translational Medical Research ; *Wound Healing
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 100
    Publication Date: 2015-11-07
    Description: The sense of smell allows chemicals to be perceived as diverse scents. We used single-neuron RNA sequencing to explore the developmental mechanisms that shape this ability as nasal olfactory neurons mature in mice. Most mature neurons expressed only one of the ~1000 odorant receptor genes (Olfrs) available, and at a high level. However, many immature neurons expressed low levels of multiple Olfrs. Coexpressed Olfrs localized to overlapping zones of the nasal epithelium, suggesting regional biases, but not to single genomic loci. A single immature neuron could express Olfrs from up to seven different chromosomes. The mature state in which expression of Olfr genes is restricted to one per neuron emerges over a developmental progression that appears to be independent of neuronal activity involving sensory transduction molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hanchate, Naresh K -- Kondoh, Kunio -- Lu, Zhonghua -- Kuang, Donghui -- Ye, Xiaolan -- Qiu, Xiaojie -- Pachter, Lior -- Trapnell, Cole -- Buck, Linda B -- DP2 HD088158/DP/NCCDPHP CDC HHS/ -- R01 DC009324/DC/NIDCD NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Dec 4;350(6265):1251-5. doi: 10.1126/science.aad2456. Epub 2015 Nov 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Basic Sciences Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA. ; Department of Genome Sciences, University of Washington, Seattle, WA 98115, USA. Molecular and Cellular Biology Program, University of Washington, Seattle, WA 98115, USA. ; Departments of Mathematics, Molecular and Cell Biology, and Electrical Engineering and Computer Sciences, University of California-Berkeley, Berkeley, CA 94720, USA. ; Department of Genome Sciences, University of Washington, Seattle, WA 98115, USA. coletrap@uw.edu lbuck@fhcrc.org. ; Howard Hughes Medical Institute, Basic Sciences Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA. coletrap@uw.edu lbuck@fhcrc.org.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26541607" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basic Helix-Loop-Helix Transcription Factors/genetics ; Cyclic Nucleotide-Gated Cation Channels/genetics ; *Gene Expression Regulation, Developmental ; Genetic Loci ; Genetic Markers ; Mice ; Mice, Inbred C57BL ; Neural Stem Cells/*metabolism ; Neurogenesis/*genetics ; Olfactory Mucosa/innervation ; Olfactory Receptor Neurons/*metabolism ; Receptors, Odorant/*genetics ; Sequence Analysis, RNA ; Single-Cell Analysis ; Smell/*genetics ; Transcriptome
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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