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  • Mice  (418)
  • 2005-2009  (418)
  • 1940-1944
  • 2009  (418)
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  • 2005-2009  (418)
  • 1940-1944
Year
  • 1
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    A change of strategy in the war on cancer (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-05-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gatenby, Robert A -- England -- Nature. 2009 May 28;459(7246):508-9. doi: 10.1038/459508a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Radiology and Integrated Mathematical Oncology, Moffitt Cancer Center, Tampa, Florida 33612, USA. robert.gatenby@moffitt.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19478766" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drug Resistance, Neoplasm/drug effects ; Drug Therapy/methods/*trends ; Female ; Humans ; Mice ; *Models, Biological ; Neoplasms/*drug therapy/pathology ; Ovarian Neoplasms/drug therapy/pathology ; Pest Control/methods ; Secondary Prevention ; Survival Rate
    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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    A functional role for adult hippocampal neurogenesis in spatial pattern separation (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-07-11
    Description: The dentate gyrus (DG) of the mammalian hippocampus is hypothesized to mediate pattern separation-the formation of distinct and orthogonal representations of mnemonic information-and also undergoes neurogenesis throughout life. How neurogenesis contributes to hippocampal function is largely unknown. Using adult mice in which hippocampal neurogenesis was ablated, we found specific impairments in spatial discrimination with two behavioral assays: (i) a spatial navigation radial arm maze task and (ii) a spatial, but non-navigable, task in the mouse touch screen. Mice with ablated neurogenesis were impaired when stimuli were presented with little spatial separation, but not when stimuli were more widely separated in space. Thus, newborn neurons may be necessary for normal pattern separation function in the DG of adult mice.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2997634/" 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/PMC2997634/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clelland, C D -- Choi, M -- Romberg, C -- Clemenson, G D Jr -- Fragniere, A -- Tyers, P -- Jessberger, S -- Saksida, L M -- Barker, R A -- Gage, F H -- Bussey, T J -- NS-050217/NS/NINDS NIH HHS/ -- R01 NS050217/NS/NINDS NIH HHS/ -- R01 NS050217-05/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2009 Jul 10;325(5937):210-3. doi: 10.1126/science.1173215.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genetics, Salk Institute for Biological Studies, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19590004" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cues ; Dentate Gyrus/cytology/*physiology ; Discrimination Learning/*physiology ; Female ; Hippocampus/cytology/*physiology ; Maze Learning ; Memory/*physiology ; Mice ; Mice, Inbred C57BL ; *Neurogenesis ; Neurons/*physiology ; Psychomotor Performance ; *Space Perception
    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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    A gene network regulating lysosomal biogenesis and function (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-06-27
    Description: Lysosomes are organelles central to degradation and recycling processes in animal cells. Whether lysosomal activity is coordinated to respond to cellular needs remains unclear. We found that most lysosomal genes exhibit coordinated transcriptional behavior and are regulated by the transcription factor EB (TFEB). Under aberrant lysosomal storage conditions, TFEB translocated from the cytoplasm to the nucleus, resulting in the activation of its target genes. TFEB overexpression in cultured cells induced lysosomal biogenesis and increased the degradation of complex molecules, such as glycosaminoglycans and the pathogenic protein that causes Huntington's disease. Thus, a genetic program controls lysosomal biogenesis and function, providing a potential therapeutic target to enhance cellular clearing in lysosomal storage disorders and neurodegenerative diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sardiello, Marco -- Palmieri, Michela -- di Ronza, Alberto -- Medina, Diego Luis -- Valenza, Marta -- Gennarino, Vincenzo Alessandro -- Di Malta, Chiara -- Donaudy, Francesca -- Embrione, Valerio -- Polishchuk, Roman S -- Banfi, Sandro -- Parenti, Giancarlo -- Cattaneo, Elena -- Ballabio, Andrea -- GTF08001/Telethon/Italy -- TGM06C01/Telethon/Italy -- TGM06C05/Telethon/Italy -- New York, N.Y. -- Science. 2009 Jul 24;325(5939):473-7. doi: 10.1126/science.1174447. Epub 2009 Jun 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Telethon Institute of Genetics and Medicine, Via P. Castellino 111, 80131 Naples, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19556463" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basic Helix-Loop-Helix Leucine Zipper Transcription Factors/metabolism ; Cells, Cultured ; Chromatin Immunoprecipitation ; Consensus Sequence ; *Gene Regulatory Networks ; HeLa Cells ; Humans ; Inverted Repeat Sequences ; Lysosomes/*genetics/*physiology ; Mice ; Promoter Regions, Genetic ; Sucrose/metabolism ; Transcription Factors/metabolism
    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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  • 4
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    A genetically encoded photoactivatable Rac controls the motility of living cells (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-08-21
    Description: The precise spatio-temporal dynamics of protein activity are often critical in determining cell behaviour, yet for most proteins they remain poorly understood; it remains difficult to manipulate protein activity at precise times and places within living cells. Protein activity has been controlled by light, through protein derivatization with photocleavable moieties or using photoreactive small-molecule ligands. However, this requires use of toxic ultraviolet wavelengths, activation is irreversible, and/or cell loading is accomplished via disruption of the cell membrane (for example, through microinjection). Here we have developed a new approach to produce genetically encoded photoactivatable derivatives of Rac1, a key GTPase regulating actin cytoskeletal dynamics in metazoan cells. Rac1 mutants were fused to the photoreactive LOV (light oxygen voltage) domain from phototropin, sterically blocking Rac1 interactions until irradiation unwound a helix linking LOV to Rac1. Photoactivatable Rac1 (PA-Rac1) could be reversibly and repeatedly activated using 458- or 473-nm light to generate precisely localized cell protrusions and ruffling. Localized Rac activation or inactivation was sufficient to produce cell motility and control the direction of cell movement. Myosin was involved in Rac control of directionality but not in Rac-induced protrusion, whereas PAK was required for Rac-induced protrusion. PA-Rac1 was used to elucidate Rac regulation of RhoA in cell motility. Rac and Rho coordinate cytoskeletal behaviours with seconds and submicrometre precision. Their mutual regulation remains controversial, with data indicating that Rac inhibits and/or activates Rho. Rac was shown to inhibit RhoA in mouse embryonic fibroblasts, with inhibition modulated at protrusions and ruffles. A PA-Rac crystal structure and modelling revealed LOV-Rac interactions that will facilitate extension of this photoactivation approach to other proteins.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2766670/" 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/PMC2766670/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, Yi I -- Frey, Daniel -- Lungu, Oana I -- Jaehrig, Angelika -- Schlichting, Ilme -- Kuhlman, Brian -- Hahn, Klaus M -- GM057464/GM/NIGMS NIH HHS/ -- GM64346/GM/NIGMS NIH HHS/ -- R01 GM057464/GM/NIGMS NIH HHS/ -- R01 GM057464-09/GM/NIGMS NIH HHS/ -- U54 GM064346/GM/NIGMS NIH HHS/ -- U54 GM064346-089026/GM/NIGMS NIH HHS/ -- England -- Nature. 2009 Sep 3;461(7260):104-8. doi: 10.1038/nature08241. Epub 2009 Aug 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of North Carolina, Chapel Hill, North Carolina 27599, USA. yiwu@med.unc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19693014" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avena/genetics ; Cell Line ; *Cell Movement/radiation effects ; Cell Surface Extensions ; Cell Survival ; Cryptochromes ; Crystallization ; Crystallography, X-Ray ; Embryo, Mammalian/cytology ; Enzyme Activation/radiation effects ; Fibroblasts ; Flavoproteins/chemistry/genetics/metabolism ; Fluorescence Recovery After Photobleaching ; Genetic Engineering/*methods ; HeLa Cells ; Humans ; Mice ; Models, Molecular ; Myosins/metabolism ; Protein Conformation ; rac1 GTP-Binding Protein/chemistry/*genetics/*metabolism/radiation effects ; rho GTP-Binding Proteins/antagonists & inhibitors/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
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    A histone H3 lysine 36 trimethyltransferase links Nkx2-5 to Wolf-Hirschhorn syndrome (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-06-02
    Description: Diverse histone modifications are catalysed and recognized by various specific proteins, establishing unique modification patterns that act as transcription signals. In particular, histone H3 trimethylation at lysine 36 (H3K36me3) is associated with actively transcribed regions and has been proposed to provide landmarks for continuing transcription; however, the control mechanisms and functions of H3K36me3 in higher eukaryotes are unknown. Here we show that the H3K36me3-specific histone methyltransferase (HMTase) Wolf-Hirschhorn syndrome candidate 1 (WHSC1, also known as NSD2 or MMSET) functions in transcriptional regulation together with developmental transcription factors whose defects overlap with the human disease Wolf-Hirschhorn syndrome (WHS). We found that mouse Whsc1, one of five putative Set2 homologues, governed H3K36me3 along euchromatin by associating with the cell-type-specific transcription factors Sall1, Sall4 and Nanog in embryonic stem cells, and Nkx2-5 in embryonic hearts, regulating the expression of their target genes. Whsc1-deficient mice showed growth retardation and various WHS-like midline defects, including congenital cardiovascular anomalies. The effects of Whsc1 haploinsufficiency were increased in Nkx2-5 heterozygous mutant hearts, indicating their functional link. We propose that WHSC1 functions together with developmental transcription factors to prevent the inappropriate transcription that can lead to various pathophysiologies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nimura, Keisuke -- Ura, Kiyoe -- Shiratori, Hidetaka -- Ikawa, Masato -- Okabe, Masaru -- Schwartz, Robert J -- Kaneda, Yasufumi -- England -- Nature. 2009 Jul 9;460(7252):287-91. doi: 10.1038/nature08086. Epub 2009 May 31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Gene Therapy Science, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19483677" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA-Binding Proteins/metabolism ; Gene Expression Regulation ; Histone-Lysine N-Methyltransferase/deficiency/genetics/*metabolism ; Histones/*metabolism ; Homeodomain Proteins/genetics/*metabolism ; Lysine/metabolism ; Methylation ; Mice ; Mice, Inbred C57BL ; Protein Binding ; Repressor Proteins/metabolism ; Transcription Factors/genetics/*metabolism ; Transcription, Genetic ; Wolf-Hirschhorn Syndrome/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
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    A human 5'-tyrosyl DNA phosphodiesterase that repairs topoisomerase-mediated DNA damage (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-10-02
    Description: Topoisomerases regulate DNA topology and are fundamental to many aspects of chromosome metabolism. Their activity involves the transient cleavage of DNA, which, if it occurs near sites of endogenous DNA damage or in the presence of topoisomerase poisons, can result in abortive topoisomerase-induced DNA strand breaks. These breaks feature covalent linkage of the enzyme to the DNA termini by a 3'- or 5'-phosphotyrosyl bond and are implicated in hereditary human disease, chromosomal instability and cancer, and underlie the clinical efficacy of an important class of anti-tumour poisons. The importance of liberating DNA termini from trapped topoisomerase is illustrated by the progressive neurodegenerative disease observed in individuals containing a mutation in tyrosyl-DNA phosphodiesterase 1 (TDP1), an enzyme that cleaves 3'-phosphotyrosyl bonds. However, a complementary human enzyme that cleaves 5'-phosphotyrosyl bonds has not been reported, despite the effect of DNA double-strand breaks containing such termini on chromosome instability and cancer. Here we identify such an enzyme in human cells and show that this activity efficiently restores 5'-phosphate termini at DNA double-strand breaks in preparation for DNA ligation. This enzyme, TTRAP, is a member of the Mg(2+)/Mn(2+)-dependent family of phosphodiesterases. Cellular depletion of TTRAP results in increased susceptibility and sensitivity to topoisomerase-II-induced DNA double-strand breaks. TTRAP is, to our knowledge, the first human 5'-tyrosyl DNA phosphodiesterase to be identified, and we suggest that this enzyme is denoted tyrosyl DNA phosphodiesterase-2 (TDP2).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cortes Ledesma, Felipe -- El Khamisy, Sherif F -- Zuma, Maria C -- Osborn, Kay -- Caldecott, Keith W -- 085284/Wellcome Trust/United Kingdom -- BB/C516595/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- C6563/A10192/Cancer Research UK/United Kingdom -- G0600776/Medical Research Council/United Kingdom -- G0901606/Medical Research Council/United Kingdom -- England -- Nature. 2009 Oct 1;461(7264):674-8. doi: 10.1038/nature08444.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genome Damage and Stability Centre, University of Sussex, Science Park Road, Falmer, Brighton, Sussex BN1 9RQ, UK. fc55@sussex.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19794497" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Camptothecin/pharmacology ; Cell Extracts/chemistry ; Cell Line, Tumor ; DNA Breaks, Double-Stranded ; DNA Breaks, Single-Stranded ; *DNA Damage/drug effects ; *DNA Repair ; DNA Topoisomerases/*metabolism ; DNA Topoisomerases, Type I/metabolism ; DNA Topoisomerases, Type II/metabolism ; Etoposide/pharmacology ; Female ; Gene Library ; Genetic Complementation Test ; Humans ; Male ; Mice ; Nuclear Proteins/deficiency/genetics/isolation & purification/*metabolism ; Phosphoric Diester Hydrolases/genetics/metabolism ; Saccharomyces cerevisiae/drug effects/enzymology/genetics/metabolism ; Suppression, Genetic ; Transcription Factors/deficiency/genetics/isolation & purification/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
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    A luminal epithelial stem cell that is a cell of origin for prostate cancer (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-09-11
    Description: In epithelial tissues, the lineage relationship between normal progenitor cells and cell type(s) of origin for cancer has been poorly understood. Here we show that a known regulator of prostate epithelial differentiation, the homeobox gene Nkx3-1, marks a stem cell population that functions during prostate regeneration. Genetic lineage-marking demonstrates that rare luminal cells that express Nkx3-1 in the absence of testicular androgens (castration-resistant Nkx3-1-expressing cells, CARNs) are bipotential and can self-renew in vivo, and single-cell transplantation assays show that CARNs can reconstitute prostate ducts in renal grafts. Functional assays of Nkx3-1 mutant mice in serial prostate regeneration suggest that Nkx3-1 is required for stem cell maintenance. Furthermore, targeted deletion of the Pten tumour suppressor gene in CARNs results in rapid carcinoma formation after androgen-mediated regeneration. These observations indicate that CARNs represent a new luminal stem cell population that is an efficient target for oncogenic transformation in prostate cancer.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2800362/" 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/PMC2800362/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Xi -- Kruithof-de Julio, Marianna -- Economides, Kyriakos D -- Walker, David -- Yu, Hailong -- Halili, M Vivienne -- Hu, Ya-Ping -- Price, Sandy M -- Abate-Shen, Cory -- Shen, Michael M -- P01 CA154293/CA/NCI NIH HHS/ -- R01 DK076602/DK/NIDDK NIH HHS/ -- R01 DK076602-05/DK/NIDDK NIH HHS/ -- U01 CA084294/CA/NCI NIH HHS/ -- U01 CA084294-10/CA/NCI NIH HHS/ -- England -- Nature. 2009 Sep 24;461(7263):495-500. doi: 10.1038/nature08361. Epub 2009 Sep 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Herbert Irving Comprehensive Cancer Center, Columbia University College of Physicians and Surgeons, New York, New York 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19741607" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/deficiency/metabolism ; Animals ; Castration ; Cell Differentiation ; Cell Division ; *Cell Lineage ; Cell Transformation, Neoplastic ; Epithelial Cells/metabolism/*pathology/transplantation ; Gene Expression Regulation ; Homeodomain Proteins/genetics/metabolism ; Kidney ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Nude ; Neoplastic Stem Cells/metabolism/*pathology/transplantation ; PTEN Phosphohydrolase/deficiency/genetics ; Prostatic Neoplasms/genetics/metabolism/*pathology ; Regeneration ; Transcription Factors/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
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    A mechanosensitive transcriptional mechanism that controls angiogenesis (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-02-27
    Description: Angiogenesis is controlled by physical interactions between cells and extracellular matrix as well as soluble angiogenic factors, such as VEGF. However, the mechanism by which mechanical signals integrate with other microenvironmental cues to regulate neovascularization remains unknown. Here we show that the Rho inhibitor, p190RhoGAP (also known as GRLF1), controls capillary network formation in vitro in human microvascular endothelial cells and retinal angiogenesis in vivo by modulating the balance of activities between two antagonistic transcription factors, TFII-I (also known as GTF2I) and GATA2, that govern gene expression of the VEGF receptor VEGFR2 (also known as KDR). Moreover, this new angiogenesis signalling pathway is sensitive to extracellular matrix elasticity as well as soluble VEGF. This is, to our knowledge, the first known functional cross-antagonism between transcription factors that controls tissue morphogenesis, and that responds to both mechanical and chemical cues.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2708674/" 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/PMC2708674/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mammoto, Akiko -- Connor, Kip M -- Mammoto, Tadanori -- Yung, Chong Wing -- Huh, Dongeun -- Aderman, Christopher M -- Mostoslavsky, Gustavo -- Smith, Lois E H -- Ingber, Donald E -- P01 CA045548/CA/NCI NIH HHS/ -- P01 CA045548-22/CA/NCI NIH HHS/ -- England -- Nature. 2009 Feb 26;457(7233):1103-8. doi: 10.1038/nature07765.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vascular Biology Program, Department of Pathology & Surgery, Children's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19242469" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Cell Line ; Endothelial Cells/metabolism ; Endothelium, Vascular/cytology/growth & development ; Extracellular Matrix/metabolism ; GATA2 Transcription Factor/metabolism ; Gene Knockdown Techniques ; Guanine Nucleotide Exchange Factors/deficiency/genetics/metabolism ; Humans ; Mice ; Mice, Inbred C57BL ; Neovascularization, Physiologic/*genetics/physiology ; Repressor Proteins/genetics/metabolism ; Retinal Vessels/growth & development/metabolism ; Signal Transduction ; Transcription Factors/deficiency/genetics/*metabolism ; Transcription Factors, TFII/metabolism ; *Transcription, Genetic ; Up-Regulation ; Vascular Endothelial Growth Factor A/metabolism ; Vascular Endothelial Growth Factor Receptor-2/biosynthesis/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 9
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    A mutation in Ihh that causes digit abnormalities alters its signalling capacity and range (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-03-03
    Description: Brachydactyly type A1 (BDA1) was the first recorded disorder of the autosomal dominant Mendelian trait in humans, characterized by shortened or absent middle phalanges in digits. It is associated with heterozygous missense mutations in indian hedgehog (IHH). Hedgehog proteins are important morphogens for a wide range of developmental processes. The capacity and range of signalling is thought to be regulated by its interaction with the receptor PTCH1 and antagonist HIP1. Here we show that a BDA1 mutation (E95K) in Ihh impairs the interaction of IHH with PTCH1 and HIP1. This is consistent with a recent paper showing that BDA1 mutations cluster in a calcium-binding site essential for the interaction with its receptor and cell-surface partners. Furthermore, we show that in a mouse model that recapitulates the E95K mutation, there is a change in the potency and range of signalling. The mice have digit abnormalities consistent with the human disorder.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gao, Bo -- Hu, Jianxin -- Stricker, Sigmar -- Cheung, Martin -- Ma, Gang -- Law, Kit Fong -- Witte, Florian -- Briscoe, James -- Mundlos, Stefan -- He, Lin -- Cheah, Kathryn S E -- Chan, Danny -- MC_U117560541/Medical Research Council/United Kingdom -- England -- Nature. 2009 Apr 30;458(7242):1196-200. doi: 10.1038/nature07862. Epub 2009 Mar 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, the University of Hong Kong, Hong Kong, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19252479" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chickens ; DNA-Binding Proteins/genetics/metabolism ; Disease Models, Animal ; Female ; Hedgehog Proteins/*genetics/*metabolism ; Humans ; Limb Deformities, Congenital/*genetics/*metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Mutant Strains ; Mutation/*genetics ; Protein Binding ; Receptors, Cell Surface/genetics/metabolism ; *Signal Transduction
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 10
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    A p53-mediated DNA damage response limits reprogramming to ensure iPS cell genomic integrity (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-08-12
    Description: The reprogramming of differentiated cells to pluripotent cells (induced pluripotent stem (iPS) cells) is known to be an inefficient process. We recently reported that cells with short telomeres cannot be reprogrammed to iPS cells despite their normal proliferation rates, probably reflecting the existence of 'reprogramming barriers' that abort the reprogramming of cells with uncapped telomeres. Here we show that p53 (also known as Trp53 in mice and TP53 in humans) is critically involved in preventing the reprogramming of cells carrying various types of DNA damage, including short telomeres, DNA repair deficiencies, or exogenously inflicted DNA damage. Reprogramming in the presence of pre-existing, but tolerated, DNA damage is aborted by the activation of a DNA damage response and p53-dependent apoptosis. Abrogation of p53 allows efficient reprogramming in the face of DNA damage and the generation of iPS cells carrying persistent DNA damage and chromosomal aberrations. These observations indicate that during reprogramming cells increase their intolerance to different types of DNA damage and that p53 is critical in preventing the generation of human and mouse pluripotent cells from suboptimal parental cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3624089/" 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/PMC3624089/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marion, Rosa M -- Strati, Katerina -- Li, Han -- Murga, Matilde -- Blanco, Raquel -- Ortega, Sagrario -- Fernandez-Capetillo, Oscar -- Serrano, Manuel -- Blasco, Maria A -- 232854/European Research Council/International -- England -- Nature. 2009 Aug 27;460(7259):1149-53. doi: 10.1038/nature08287. Epub 2009 Aug 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Research Centre (CNIO), Melchor Fernandez Almagro 3, Madrid E-28029, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19668189" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Cells, Cultured ; Cellular Reprogramming/*physiology ; Chromosome Aberrations ; DNA Damage/genetics/*physiology ; DNA Repair ; Female ; Fibroblasts/cytology/metabolism ; Genomic Instability/genetics/*physiology ; Humans ; Male ; Mice ; Pluripotent Stem Cells/*cytology/*metabolism ; Telomere/genetics/metabolism ; Tumor Suppressor Protein p53/deficiency/genetics/*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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