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  • 1
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    New role of bone morphogenetic protein 7 in brown adipogenesis and energy expenditure (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-08-23
    Description: Adipose tissue is central to the regulation of energy balance. Two functionally different types of fat are present in mammals: white adipose tissue, the primary site of triglyceride storage, and brown adipose tissue, which is specialized in energy expenditure and can counteract obesity. Factors that specify the developmental fate and function of white and brown adipose tissue remain poorly understood. Here we demonstrate that whereas some members of the family of bone morphogenetic proteins (BMPs) support white adipocyte differentiation, BMP7 singularly promotes differentiation of brown preadipocytes even in the absence of the normally required hormonal induction cocktail. BMP7 activates a full program of brown adipogenesis including induction of early regulators of brown fat fate PRDM16 (PR-domain-containing 16; ref. 4) and PGC-1alpha (peroxisome proliferator-activated receptor-gamma (PPARgamma) coactivator-1alpha; ref. 5), increased expression of the brown-fat-defining marker uncoupling protein 1 (UCP1) and adipogenic transcription factors PPARgamma and CCAAT/enhancer-binding proteins (C/EBPs), and induction of mitochondrial biogenesis via p38 mitogen-activated protein (MAP) kinase-(also known as Mapk14) and PGC-1-dependent pathways. Moreover, BMP7 triggers commitment of mesenchymal progenitor cells to a brown adipocyte lineage, and implantation of these cells into nude mice results in development of adipose tissue containing mostly brown adipocytes. Bmp7 knockout embryos show a marked paucity of brown fat and an almost complete absence of UCP1. Adenoviral-mediated expression of BMP7 in mice results in a significant increase in brown, but not white, fat mass and leads to an increase in energy expenditure and a reduction in weight gain. These data reveal an important role of BMP7 in promoting brown adipocyte differentiation and thermogenesis in vivo and in vitro, and provide a potential new therapeutic approach for the treatment of obesity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2745972/" 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/PMC2745972/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tseng, Yu-Hua -- Kokkotou, Efi -- Schulz, Tim J -- Huang, Tian Lian -- Winnay, Jonathon N -- Taniguchi, Cullen M -- Tran, T Thien -- Suzuki, Ryo -- Espinoza, Daniel O -- Yamamoto, Yuji -- Ahrens, Molly J -- Dudley, Andrew T -- Norris, Andrew W -- Kulkarni, Rohit N -- Kahn, C Ronald -- K08 DK064906/DK/NIDDK NIH HHS/ -- K08 DK64906/DK/NIDDK NIH HHS/ -- P30 DK040561/DK/NIDDK NIH HHS/ -- P30 DK040561-13/DK/NIDDK NIH HHS/ -- P30 DK46200/DK/NIDDK NIH HHS/ -- R01 DK 060837/DK/NIDDK NIH HHS/ -- R01 DK077097/DK/NIDDK NIH HHS/ -- R01 DK077097-01A1/DK/NIDDK NIH HHS/ -- R01 DK077097-02/DK/NIDDK NIH HHS/ -- R01 DK67536/DK/NIDDK NIH HHS/ -- R21 DK070722/DK/NIDDK NIH HHS/ -- R21 DK070722-01/DK/NIDDK NIH HHS/ -- R21 DK070722-02/DK/NIDDK NIH HHS/ -- England -- Nature. 2008 Aug 21;454(7207):1000-4. doi: 10.1038/nature07221.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section on Obesity and Hormone Action, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts 02215, USA. yu-hua.tseng@joslin.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18719589" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3-L1 Cells ; *Adipogenesis ; Adipose Tissue, Brown/*growth & development/*metabolism ; Adipose Tissue, White/growth & development ; Animals ; Bone Morphogenetic Protein 7 ; Bone Morphogenetic Proteins/*metabolism ; Cell Line ; *Energy Metabolism/genetics ; Male ; Mesenchymal Stromal Cells/cytology/physiology ; Mice ; Mice, Inbred C57BL ; Mice, Nude ; Mitochondria/physiology ; Thermogenesis ; Transforming Growth Factor beta/*metabolism ; p38 Mitogen-Activated Protein Kinases/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 2
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    Medicine. Can we nip obesity in its vascular bud? (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-10-25
    Description: 〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4351775/" 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/PMC4351775/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kahn, C Ronald -- P30 DK036836/DK/NIDDK NIH HHS/ -- R01 DK082659/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2008 Oct 24;322(5901):542-3. doi: 10.1126/science.1165667.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Joslin Diabetes Center, One Joslin Place, Boston, MA 02215, USA. c.ronald.kahn@joslin.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18948531" target="_blank"〉PubMed〈/a〉
    Keywords: Adipocytes/*cytology/metabolism ; Adipocytes, Brown/cytology/metabolism ; Adipocytes, White/*cytology/metabolism ; Adipogenesis ; Adipose Tissue/*blood supply/cytology/metabolism ; Adiposity ; Animals ; Cell Lineage ; Gene Expression ; Humans ; Mesenchymal Stromal Cells/cytology ; Mice ; Multipotent Stem Cells/*cytology/metabolism ; Pericytes/*cytology/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Suppression of aging in mice by the hormone Klotho (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-08-27
    Description: A defect in Klotho gene expression in mice accelerates the degeneration of multiple age-sensitive traits. Here, we show that overexpression of Klotho in mice extends life span. Klotho protein functions as a circulating hormone that binds to a cell-surface receptor and represses intracellular signals of insulin and insulin-like growth factor 1 (IGF1), an evolutionarily conserved mechanism for extending life span. Alleviation of aging-like phenotypes in Klotho-deficient mice was observed by perturbing insulin and IGF1 signaling, suggesting that Klotho-mediated inhibition of insulin and IGF1 signaling contributes to its anti-aging properties. Klotho protein may function as an anti-aging hormone in mammals.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2536606/" 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/PMC2536606/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kurosu, Hiroshi -- Yamamoto, Masaya -- Clark, Jeremy D -- Pastor, Johanne V -- Nandi, Animesh -- Gurnani, Prem -- McGuinness, Owen P -- Chikuda, Hirotaka -- Yamaguchi, Masayuki -- Kawaguchi, Hiroshi -- Shimomura, Iichiro -- Takayama, Yoshiharu -- Herz, Joachim -- Kahn, C Ronald -- Rosenblatt, Kevin P -- Kuro-o, Makoto -- R01 AG019712/AG/NIA NIH HHS/ -- R01 AG019712-05/AG/NIA NIH HHS/ -- R01 AG025326/AG/NIA NIH HHS/ -- R01 AG025326-03/AG/NIA NIH HHS/ -- R01AG19712/AG/NIA NIH HHS/ -- R01AG25326/AG/NIA NIH HHS/ -- R37 HL063762/HL/NHLBI NIH HHS/ -- U24 DK059637/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2005 Sep 16;309(5742):1829-33. Epub 2005 Aug 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, University of Texas (UT) Southwestern Medical Center at Dallas, 5323 Harry Hines Bouleuvard, Dallas, TX 75390-9072, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16123266" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics/*physiology ; Animals ; Blood Glucose/analysis ; Cell Line ; Cell Line, Tumor ; Eating ; Female ; Glucuronidase ; Insulin/blood/metabolism ; Insulin Resistance ; Insulin-Like Growth Factor I/metabolism/pharmacology ; Ligands ; Longevity/genetics/*physiology ; Male ; Membrane Proteins/chemistry/*genetics/pharmacology/*physiology ; Mice ; Mice, Transgenic ; Myoblasts/metabolism ; Oxygen Consumption ; Peptide Fragments/chemistry/pharmacology ; Phosphorylation ; Receptor, IGF Type 1/metabolism ; Receptor, Insulin/metabolism ; Receptors, Cell Surface/metabolism ; Recombinant Proteins/chemistry/isolation & purification/metabolism ; Signal Transduction
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    The Application of Satellite-Derived, High-Resolution Land Use/Land Cover Data to Improve Urban Air Quality Model Forecasts (2006)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Local and state agencies are responsible for developing state implementation plans to meet National Ambient Air Quality Standards. Numerical models used for this purpose simulate the transport and transformation of criteria pollutants and their precursors. The specification of land use/land cover (LULC) plays an important role in controlling modeled surface meteorology and emissions. NASA researchers have worked with partners and Atlanta stakeholders to incorporate an improved high-resolution LULC dataset for the Atlanta area within their modeling system and to assess meteorological and air quality impacts of Urban Heat Island (UHI) mitigation strategies. The new LULC dataset provides a more accurate representation of land use, has the potential to improve model accuracy, and facilitates prediction of LULC changes. Use of the new LULC dataset for two summertime episodes improved meteorological forecasts, with an existing daytime cold bias of approx. equal to 3 C reduced by 30%. Model performance for ozone prediction did not show improvement. In addition, LULC changes due to Atlanta area urbanization were predicted through 2030, for which model simulations predict higher urban air temperatures. The incorporation of UHI mitigation strategies partially offset this warming trend. The data and modeling methods used are generally applicable to other U.S. cities.
    Keywords: Environment Pollution
    Type: NASA/TP-2006-214710 , M-1177
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  • 5
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    Airborne Sunphotometer and Solar Spectral Flux Radiometer Measurements During INTEX/ITCT 2004 (2005)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: During the period 12 July - 8 August 2004, the NASA Ames 14-channel Airborne Tracking Sunphotometer (MTS-14) and Solar Spectral Flux Radiometer (SSFR) were operated aboard a Jetstream 31 (J31) aircraft and acquired measurements during nineteen science flights (approx. 53 flight hours) over the Gulf of Maine in support of the INTEX-NA (INtercontinental chemical Transport Experiment-North America) and ITCT (Intercontinental Transport and Chemical Transformation of anthropogenic pollution) field studies. In this paper, we will present results from analyses of those data sets. AATS-14 measures the direct solar beam transmission at fourteen discrete wavelengths (354-2138 nm), and provides instantaneous measurements of aerosol optical depth (AOD) spectra and water vapor column content, in addition to vertical profiles of aerosol extinction and water vapor density during suitable aircraft ascents and descents. SSFR consists of separate nadir and zenith viewing hemispheric FOV sensors that yield measurements of up- and downwelling solar irradiance at a spectral resolution of approx. 8-12 nm over the wavelength range 300-1700 nm. The objectives of the J31-based measurements during INTEX/ITCT were to provide AOD data for the evaluation of MODIS (MODerate-resolution Imaging Spectroradiometer) and MISR (Multi-angle Imaging Spectro-Radiometer) AOD retrievals, quantify sea surface spectral albedo (which can contribute the largest uncertainty to satellite aerosol retrievals for low aerosol loading), test closure (consistency) among suborbital results, test chemical-transport models using AOD profiles, and assess regional radiative forcing by combining satellite and suborbital results. Specific J31 flight patterns were designed to achieve these objectives, and they included a mixture of vertical profiles (spiral and ramped ascents and descents) and constant altitude horizontal transects at a variety of altitudes. Additional information is included in the original extended abstract.
    Keywords: Environment Pollution
    Type: Atmospheric Sciences and Air Quality Conference; Apr 27, 2005 - Apr 29, 2005; San Francisco, CA; United States
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