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  • Articles  (23)
  • Cell Proliferation
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  • Articles  (23)
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  • Nature Publishing Group (NPG)  (16)
  • American Association for the Advancement of Science (AAAS)  (7)
  • American Geophysical Union
  • American Meteorological Society
  • Annual Reviews
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  • 1
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    ATP-binding cassette transporters and HDL suppress hematopoietic stem cell proliferation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-22
    Description: Elevated leukocyte cell numbers (leukocytosis), and monocytes in particular, promote atherosclerosis; however, how they become increased is poorly understood. Mice deficient in the adenosine triphosphate-binding cassette (ABC) transporters ABCA1 and ABCG1, which promote cholesterol efflux from macrophages and suppress atherosclerosis in hypercholesterolemic mice, displayed leukocytosis, a transplantable myeloproliferative disorder, and a dramatic expansion of the stem and progenitor cell population containing Lin(-)Sca-1(+)Kit+ (LSK) in the bone marrow. Transplantation of Abca1(-/-) Abcg1(-/-) bone marrow into apolipoprotein A-1 transgenic mice with elevated levels of high-density lipoprotein (HDL) suppressed the LSK population, reduced leukocytosis, reversed the myeloproliferative disorder, and accelerated atherosclerosis. The findings indicate that ABCA1, ABCG1, and HDL inhibit the proliferation of hematopoietic stem and multipotential progenitor cells and connect expansion of these populations with leukocytosis and accelerated atherosclerosis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3032591/" 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/PMC3032591/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yvan-Charvet, Laurent -- Pagler, Tamara -- Gautier, Emmanuel L -- Avagyan, Serine -- Siry, Read L -- Han, Seongah -- Welch, Carrie L -- Wang, Nan -- Randolph, Gwendalyn J -- Snoeck, Hans W -- Tall, Alan R -- HL54591/HL/NHLBI NIH HHS/ -- R01 AG029626/AG/NIA NIH HHS/ -- R01 AI049653/AI/NIAID NIH HHS/ -- R01 AI049653-09/AI/NIAID NIH HHS/ -- R01 AI049653-10/AI/NIAID NIH HHS/ -- R01 AI061741/AI/NIAID NIH HHS/ -- R01 AI061741-03/AI/NIAID NIH HHS/ -- R01 AI061741-04/AI/NIAID NIH HHS/ -- R01A1061741/PHS HHS/ -- R01AG016327/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2010 Jun 25;328(5986):1689-93. doi: 10.1126/science.1189731. Epub 2010 May 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Medicine, Department of Medicine, Columbia University, New York, NY 10032, USA. ly2159@columbia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20488992" target="_blank"〉PubMed〈/a〉
    Keywords: ATP Binding Cassette Transporter 1 ; ATP-Binding Cassette Transporters/genetics/*metabolism ; Animals ; Apolipoprotein A-I/genetics/metabolism ; Atherosclerosis/metabolism/*physiopathology/therapy ; Bone Marrow Transplantation ; Cell Proliferation ; Cells, Cultured ; Cholesterol/*metabolism ; Hematopoietic Stem Cells/*physiology ; Hypercholesterolemia/metabolism ; Leukocytosis/metabolism/*physiopathology/therapy ; Lipoproteins/genetics/*metabolism ; Lipoproteins, HDL/*metabolism ; Macrophages/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Inbred DBA ; Mice, Transgenic ; Multipotent Stem Cells/physiology ; Myeloid Progenitor Cells/*physiology ; Myeloproliferative Disorders/metabolism/physiopathology/therapy ; Phenotype ; Receptors, Granulocyte-Macrophage Colony-Stimulating Factor/metabolism ; Receptors, Interleukin-3/metabolism ; Signal Transduction
    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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  • 2
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    Lkb1 regulates quiescence and metabolic homeostasis of haematopoietic stem cells (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-12-03
    Description: The capacity to fine-tune cellular bioenergetics with the demands of stem-cell maintenance and regeneration is central to normal development and ageing, and to organismal survival during periods of acute stress. How energy metabolism and stem-cell homeostatic processes are coordinated is not well understood. Lkb1 acts as an evolutionarily conserved regulator of cellular energy metabolism in eukaryotic cells and functions as the major upstream kinase to phosphorylate AMP-activated protein kinase (AMPK) and 12 other AMPK-related kinases. Whether Lkb1 regulates stem-cell maintenance remains unknown. Here we show that Lkb1 has an essential role in haematopoietic stem cell (HSC) homeostasis. We demonstrate that ablation of Lkb1 in adult mice results in severe pancytopenia and subsequent lethality. Loss of Lkb1 leads to impaired survival and escape from quiescence of HSCs, resulting in exhaustion of the HSC pool and a marked reduction of HSC repopulating potential in vivo. Lkb1 deletion has an impact on cell proliferation in HSCs, but not on more committed compartments, pointing to context-specific functions for Lkb1 in haematopoiesis. The adverse impact of Lkb1 deletion on haematopoiesis was predominantly cell-autonomous and mTOR complex 1 (mTORC1)-independent, and involves multiple mechanisms converging on mitochondrial apoptosis and possibly downregulation of PGC-1 coactivators and their transcriptional network, which have critical roles in mitochondrial biogenesis and function. Thus, Lkb1 serves as an essential regulator of HSCs and haematopoiesis, and more generally, points to the critical importance of coupling energy metabolism and stem-cell homeostasis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3058342/" 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/PMC3058342/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gan, Boyi -- Hu, Jian -- Jiang, Shan -- Liu, Yingchun -- Sahin, Ergun -- Zhuang, Li -- Fletcher-Sananikone, Eliot -- Colla, Simona -- Wang, Y Alan -- Chin, Lynda -- Depinho, Ronald A -- 01CA141508/CA/NCI NIH HHS/ -- R21 CA135057/CA/NCI NIH HHS/ -- R21 CA135057-01/CA/NCI NIH HHS/ -- R21CA135057/CA/NCI NIH HHS/ -- U01 CA141508/CA/NCI NIH HHS/ -- U01 CA141508-01/CA/NCI NIH HHS/ -- England -- Nature. 2010 Dec 2;468(7324):701-4. doi: 10.1038/nature09595.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Belfer Institute for Applied Cancer Science, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21124456" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Cell Cycle/*physiology ; Cell Proliferation ; Cell Survival ; *Energy Metabolism ; Female ; Gene Deletion ; Hematopoiesis ; Hematopoietic Stem Cells/*cytology/*metabolism/pathology ; *Homeostasis ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mitochondria/metabolism/pathology ; Multiprotein Complexes ; Pancytopenia/genetics ; Phenotype ; Protein-Serine-Threonine Kinases/deficiency/genetics/*metabolism ; Proteins/metabolism ; Survival Analysis ; TOR Serine-Threonine Kinases ; Transcription Factors/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
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    Disruption of the clock components CLOCK and BMAL1 leads to hypoinsulinaemia and diabetes (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-06-22
    Description: The molecular clock maintains energy constancy by producing circadian oscillations of rate-limiting enzymes involved in tissue metabolism across the day and night. During periods of feeding, pancreatic islets secrete insulin to maintain glucose homeostasis, and although rhythmic control of insulin release is recognized to be dysregulated in humans with diabetes, it is not known how the circadian clock may affect this process. Here we show that pancreatic islets possess self-sustained circadian gene and protein oscillations of the transcription factors CLOCK and BMAL1. The phase of oscillation of islet genes involved in growth, glucose metabolism and insulin signalling is delayed in circadian mutant mice, and both Clock and Bmal1 (also called Arntl) mutants show impaired glucose tolerance, reduced insulin secretion and defects in size and proliferation of pancreatic islets that worsen with age. Clock disruption leads to transcriptome-wide alterations in the expression of islet genes involved in growth, survival and synaptic vesicle assembly. Notably, conditional ablation of the pancreatic clock causes diabetes mellitus due to defective beta-cell function at the very latest stage of stimulus-secretion coupling. These results demonstrate a role for the beta-cell clock in coordinating insulin secretion with the sleep-wake cycle, and reveal that ablation of the pancreatic clock can trigger the onset of diabetes mellitus.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2920067/" 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/PMC2920067/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marcheva, Biliana -- Ramsey, Kathryn Moynihan -- Buhr, Ethan D -- Kobayashi, Yumiko -- Su, Hong -- Ko, Caroline H -- Ivanova, Ganka -- Omura, Chiaki -- Mo, Shelley -- Vitaterna, Martha H -- Lopez, James P -- Philipson, Louis H -- Bradfield, Christopher A -- Crosby, Seth D -- JeBailey, Lellean -- Wang, Xiaozhong -- Takahashi, Joseph S -- Bass, Joseph -- P01 AG011412/AG/NIA NIH HHS/ -- P01 AG011412-080011/AG/NIA NIH HHS/ -- R01 HL097817/HL/NHLBI NIH HHS/ -- R01 HL097817-01/HL/NHLBI NIH HHS/ -- R37 ES005703/ES/NIEHS NIH HHS/ -- R37-ES-005703/ES/NIEHS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 Jul 29;466(7306):627-31. doi: 10.1038/nature09253.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20562852" target="_blank"〉PubMed〈/a〉
    Keywords: ARNTL Transcription Factors/deficiency/*genetics/metabolism ; Aging/genetics/pathology ; Animals ; Blood Glucose/analysis/metabolism ; CLOCK Proteins/deficiency/*genetics/metabolism ; Cell Proliferation ; Cell Size ; Cell Survival ; Circadian Rhythm/genetics/*physiology ; Diabetes Mellitus/genetics/*metabolism ; Gene Expression Profiling ; Glucose Intolerance/genetics ; Glucose Tolerance Test ; In Vitro Techniques ; Insulin/*blood/metabolism/secretion ; Islets of Langerhans/*metabolism/pathology/secretion ; Mice ; Period Circadian Proteins/genetics/metabolism ; Phenotype ; Sleep/genetics/physiology ; Synaptic Vesicles/metabolism ; Wakefulness/genetics/physiology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
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    CD95 promotes tumour growth (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-05-28
    Description: CD95 (also called Fas and APO-1) is a prototypical death receptor that regulates tissue homeostasis mainly in the immune system through the induction of apoptosis. During cancer progression CD95 is frequently downregulated or cells are rendered apoptosis resistant, raising the possibility that loss of CD95 is part of a mechanism for tumour evasion. However, complete loss of CD95 is rarely seen in human cancers and many cancer cells express large quantities of CD95 and are highly sensitive to CD95-mediated apoptosis in vitro. Furthermore, cancer patients frequently have elevated levels of the physiological ligand for CD95, CD95L. These data raise the possibility that CD95 could actually promote the growth of tumours through its non-apoptotic activities. Here we show that cancer cells in general, regardless of their CD95 apoptosis sensitivity, depend on constitutive activity of CD95, stimulated by cancer-produced CD95L, for optimal growth. Consistently, loss of CD95 in mouse models of ovarian cancer and liver cancer reduces cancer incidence as well as the size of the tumours. The tumorigenic activity of CD95 is mediated by a pathway involving JNK and Jun. These results demonstrate that CD95 has a growth-promoting role during tumorigenesis and indicate that efforts to inhibit its activity rather than to enhance it should be considered during cancer therapy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2879093/" 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/PMC2879093/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Lina -- Park, Sun-Mi -- Tumanov, Alexei V -- Hau, Annika -- Sawada, Kenjiro -- Feig, Christine -- Turner, Jerrold R -- Fu, Yang-Xin -- Romero, Iris L -- Lengyel, Ernst -- Peter, Marcus E -- CA112240/CA/NCI NIH HHS/ -- K12 HD000849/HD/NICHD NIH HHS/ -- L30 CA153336/CA/NCI NIH HHS/ -- R01 CA095319/CA/NCI NIH HHS/ -- R01 CA11182/CA/NCI NIH HHS/ -- R01 CA112240/CA/NCI NIH HHS/ -- R01 CA112240-01A1/CA/NCI NIH HHS/ -- R01 CA112240-02/CA/NCI NIH HHS/ -- R01 CA112240-03/CA/NCI NIH HHS/ -- R01 CA112240-04/CA/NCI NIH HHS/ -- R01 CA112240-05/CA/NCI NIH HHS/ -- England -- Nature. 2010 May 27;465(7297):492-6. doi: 10.1038/nature09075.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Ben May Department for Cancer Research, The University of Chicago, 924 E 57th Street, Chicago, Illinois 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20505730" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD95/deficiency/genetics/*metabolism ; Apoptosis ; Carcinoma, Endometrioid/metabolism/pathology ; Cell Line, Tumor ; Cell Proliferation ; Fas Ligand Protein/antagonists & inhibitors/immunology/metabolism ; Female ; Gene Expression Regulation, Neoplastic ; Hepatocytes/enzymology/metabolism/pathology ; Humans ; Liver Neoplasms/enzymology/metabolism/pathology ; Male ; Mice ; Mitogen-Activated Protein Kinase 8/deficiency/genetics/metabolism ; Neoplasms/*metabolism/*pathology ; Ovarian Neoplasms/metabolism/pathology
    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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    DNMT1 maintains progenitor function in self-renewing somatic tissue (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-01-19
    Description: Progenitor cells maintain self-renewing tissues throughout life by sustaining their capacity for proliferation while suppressing cell cycle exit and terminal differentiation. DNA methylation provides a potential epigenetic mechanism for the cellular memory needed to preserve the somatic progenitor state through repeated cell divisions. DNA methyltransferase 1 (DNMT1) maintains DNA methylation patterns after cellular replication. Although dispensable for embryonic stem cell maintenance, the role for DNMT1 in maintaining the progenitor state in constantly replenished somatic tissues, such as mammalian epidermis, is unclear. Here we show that DNMT1 is essential for epidermal progenitor cell function. DNMT1 protein was found enriched in undifferentiated cells, where it was required to retain proliferative stamina and suppress differentiation. In tissue, DNMT1 depletion led to exit from the progenitor cell compartment, premature differentiation and eventual tissue loss. Genome-wide analysis showed that a significant portion of epidermal differentiation gene promoters were methylated in self-renewing conditions but were subsequently demethylated during differentiation. Furthermore, UHRF1 (refs 9, 10), a component of the DNA methylation machinery that targets DNMT1 to hemi-methylated DNA, is also necessary to suppress premature differentiation and sustain proliferation. In contrast, Gadd45A and B, which promote active DNA demethylation, are required for full epidermal differentiation gene induction. These data demonstrate that proteins involved in the dynamic regulation of DNA methylation patterns are required for progenitor maintenance and self-renewal in mammalian somatic tissue.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3050546/" 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/PMC3050546/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sen, George L -- Reuter, Jason A -- Webster, Daniel E -- Zhu, Lilly -- Khavari, Paul A -- AR055849/AR/NIAMS NIH HHS/ -- AR45192/AR/NIAMS NIH HHS/ -- F32 AR055849/AR/NIAMS NIH HHS/ -- F32 AR055849-02/AR/NIAMS NIH HHS/ -- K01 AR057828/AR/NIAMS NIH HHS/ -- R01 AR045192/AR/NIAMS NIH HHS/ -- R01 AR045192-11A2/AR/NIAMS NIH HHS/ -- R01 AR049737/AR/NIAMS NIH HHS/ -- R01 AR049737-05/AR/NIAMS NIH HHS/ -- T32 CA009302/CA/NCI NIH HHS/ -- England -- Nature. 2010 Jan 28;463(7280):563-7. doi: 10.1038/nature08683. Epub 2010 Jan 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Programs in Epithelial Biology and Cancer Biology and the Stanford Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20081831" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Differentiation ; Cell Proliferation ; Cells, Cultured ; DNA Methylation ; Down-Regulation ; Epidermis/*cytology/*metabolism ; Female ; Gene Silencing ; Humans ; Mice ; Mice, SCID ; Repressor Proteins/deficiency/genetics/*metabolism ; Stem Cells/*cytology/*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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    Zscan4 regulates telomere elongation and genomic stability in ES cells (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-03-26
    Description: Exceptional genomic stability is one of the hallmarks of mouse embryonic stem (ES) cells. However, the genes contributing to this stability remain obscure. We previously identified Zscan4 as a specific marker for two-cell embryo and ES cells. Here we show that Zscan4 is involved in telomere maintenance and long-term genomic stability in ES cells. Only 5% of ES cells express Zscan4 at a given time, but nearly all ES cells activate Zscan4 at least once during nine passages. The transient Zscan4-positive state is associated with rapid telomere extension by telomere recombination and upregulation of meiosis-specific homologous recombination genes, which encode proteins that are colocalized with ZSCAN4 on telomeres. Furthermore, Zscan4 knockdown shortens telomeres, increases karyotype abnormalities and spontaneous sister chromatid exchange, and slows down cell proliferation until reaching crisis by passage eight. Together, our data show a unique mode of genome maintenance in ES cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2851843/" 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/PMC2851843/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zalzman, Michal -- Falco, Geppino -- Sharova, Lioudmila V -- Nishiyama, Akira -- Thomas, Marshall -- Lee, Sung-Lim -- Stagg, Carole A -- Hoang, Hien G -- Yang, Hsih-Te -- Indig, Fred E -- Wersto, Robert P -- Ko, Minoru S H -- ZIA AG000655-11/Intramural NIH HHS/ -- ZIA AG000656-11/Intramural NIH HHS/ -- ZIA AG000700-02/Intramural NIH HHS/ -- ZIA AG000706-02/Intramural NIH HHS/ -- England -- Nature. 2010 Apr 8;464(7290):858-63. doi: 10.1038/nature08882. Epub 2010 Mar 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Genomics and Aging Section, Laboratory of Genetics, NIH, Baltimore, Maryland 21224, USA〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20336070" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Proliferation ; Chromosome Aberrations ; Embryonic Stem Cells/cytology/*metabolism/pathology ; Gene Expression Regulation ; Gene Knockdown Techniques ; *Genomic Instability ; Karyotyping ; Meiosis/genetics/physiology ; Mice ; Protein Transport ; Recombination, Genetic/genetics ; Sister Chromatid Exchange/genetics ; Telomere/*genetics/*metabolism ; Transcription Factors/deficiency/genetics/*metabolism ; Up-Regulation
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
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    The junctional adhesion molecule JAML is a costimulatory receptor for epithelial gammadelta T cell activation (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-09-04
    Description: Gammadelta T cells present in epithelial tissues provide a crucial first line of defense against environmental insults, including infection, trauma, and malignancy, yet the molecular events surrounding their activation remain poorly defined. Here we identify an epithelial gammadelta T cell-specific costimulatory molecule, junctional adhesion molecule-like protein (JAML). Binding of JAML to its ligand Coxsackie and adenovirus receptor (CAR) provides costimulation leading to cellular proliferation and cytokine and growth factor production. Inhibition of JAML costimulation leads to diminished gammadelta T cell activation and delayed wound closure akin to that seen in the absence of gammadelta T cells. Our results identify JAML as a crucial component of epithelial gammadelta T cell biology and have broader implications for CAR and JAML in tissue homeostasis and repair.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2943937/" 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/PMC2943937/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Witherden, Deborah A -- Verdino, Petra -- Rieder, Stephanie E -- Garijo, Olivia -- Mills, Robyn E -- Teyton, Luc -- Fischer, Wolfgang H -- Wilson, Ian A -- Havran, Wendy L -- AI064811/AI/NIAID NIH HHS/ -- AI42266/AI/NIAID NIH HHS/ -- AI52257/AI/NIAID NIH HHS/ -- CA58896/CA/NCI NIH HHS/ -- NS057096/NS/NINDS NIH HHS/ -- R01 AI036964/AI/NIAID NIH HHS/ -- R01 AI052257/AI/NIAID NIH HHS/ -- R01 AI052257-05/AI/NIAID NIH HHS/ -- R01 AI064811/AI/NIAID NIH HHS/ -- R01 AI064811-05/AI/NIAID NIH HHS/ -- R01 GM080301/GM/NIGMS NIH HHS/ -- R37 AI042266/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 3;329(5996):1205-10. doi: 10.1126/science.1192698.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20813954" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Animals ; Cell Adhesion Molecules/*metabolism ; Cell Line ; Cell Proliferation ; Coxsackie and Adenovirus Receptor-Like Membrane Protein ; Cytokines/metabolism ; Epidermis/cytology/*immunology/injuries ; Epithelial Cells ; Epithelium/immunology/metabolism ; Intercellular Signaling Peptides and Proteins/metabolism ; Keratinocytes/metabolism ; Ligands ; *Lymphocyte Activation ; Mice ; Mice, Inbred C57BL ; Phosphatidylinositol 3-Kinases/metabolism ; Protein Binding ; Receptors, Antigen, T-Cell, gamma-delta/*immunology/metabolism ; Receptors, Virus/*metabolism ; T-Lymphocyte Subsets/*immunology/*metabolism ; Wound Healing
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Role of Tet proteins in 5mC to 5hmC conversion, ES-cell self-renewal and inner cell mass specification (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-07-20
    Description: DNA methylation is one of the best-characterized epigenetic modifications. Although the enzymes that catalyse DNA methylation have been characterized, enzymes responsible for demethylation have been elusive. A recent study indicates that the human TET1 protein could catalyse the conversion of 5-methylcytosine (5mC) of DNA to 5-hydroxymethylcytosine (5hmC), raising the possibility that DNA demethylation may be a Tet1-mediated process. Here we extend this study by demonstrating that all three mouse Tet proteins (Tet1, Tet2 and Tet3) can also catalyse a similar reaction. Tet1 has an important role in mouse embryonic stem (ES) cell maintenance through maintaining the expression of Nanog in ES cells. Downregulation of Nanog via Tet1 knockdown correlates with methylation of the Nanog promoter, supporting a role for Tet1 in regulating DNA methylation status. Furthermore, knockdown of Tet1 in pre-implantation embryos results in a bias towards trophectoderm differentiation. Thus, our studies not only uncover the enzymatic activity of the Tet proteins, but also demonstrate a role for Tet1 in ES cell maintenance and inner cell mass cell specification.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3491567/" 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/PMC3491567/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ito, Shinsuke -- D'Alessio, Ana C -- Taranova, Olena V -- Hong, Kwonho -- Sowers, Lawrence C -- Zhang, Yi -- CA084487/CA/NCI NIH HHS/ -- GM68804/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2010 Aug 26;466(7310):1129-33. doi: 10.1038/nature09303.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20639862" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine/*metabolism ; Alkaline Phosphatase/metabolism ; Animals ; Blastocyst Inner Cell Mass/*metabolism ; Cell Proliferation ; Cytosine/*analogs & derivatives/metabolism ; DNA-Binding Proteins/genetics/*metabolism ; Embryonic Stem Cells/*cytology ; Gene Expression Regulation, Developmental ; Gene Knockdown Techniques ; Homeodomain Proteins/metabolism ; Mice ; Proto-Oncogene Proteins/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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    Targeted deletion of the 9p21 non-coding coronary artery disease risk interval in mice (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-02-23
    Description: Sequence polymorphisms in a 58-kilobase (kb) interval on chromosome 9p21 confer a markedly increased risk of coronary artery disease (CAD), the leading cause of death worldwide. The variants have a substantial effect on the epidemiology of CAD and other life-threatening vascular conditions because nearly one-quarter of Caucasians are homozygous for risk alleles. However, the risk interval is devoid of protein-coding genes and the mechanism linking the region to CAD risk has remained enigmatic. Here we show that deletion of the orthologous 70-kb non-coding interval on mouse chromosome 4 affects cardiac expression of neighbouring genes, as well as proliferation properties of vascular cells. Chr4(Delta70kb/Delta70kb) mice are viable, but show increased mortality both during development and as adults. Cardiac expression of two genes near the non-coding interval, Cdkn2a and Cdkn2b, is severely reduced in chr4(Delta70kb/Delta70kb) mice, indicating that distant-acting gene regulatory functions are located in the non-coding CAD risk interval. Allele-specific expression of Cdkn2b transcripts in heterozygous mice showed that the deletion affects expression through a cis-acting mechanism. Primary cultures of chr4(Delta70kb/Delta70kb) aortic smooth muscle cells exhibited excessive proliferation and diminished senescence, a cellular phenotype consistent with accelerated CAD pathogenesis. Taken together, our results provide direct evidence that the CAD risk interval has a pivotal role in regulation of cardiac Cdkn2a/b expression, and suggest that this region affects CAD progression by altering the dynamics of vascular cell proliferation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2938076/" 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/PMC2938076/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Visel, Axel -- Zhu, Yiwen -- May, Dalit -- Afzal, Veena -- Gong, Elaine -- Attanasio, Catia -- Blow, Matthew J -- Cohen, Jonathan C -- Rubin, Edward M -- Pennacchio, Len A -- DK59630/DK/NIDDK NIH HHS/ -- R01 HG003988/HG/NHGRI NIH HHS/ -- R01 HG003988-04/HG/NHGRI NIH HHS/ -- R01 HL082896/HL/NHLBI NIH HHS/ -- R01 HL082896-03/HL/NHLBI NIH HHS/ -- R21 HL098940/HL/NHLBI NIH HHS/ -- R21 HL098940-01/HL/NHLBI NIH HHS/ -- U01 HL066681/HL/NHLBI NIH HHS/ -- U01 HL066681-08/HL/NHLBI NIH HHS/ -- England -- Nature. 2010 Mar 18;464(7287):409-12. doi: 10.1038/nature08801. Epub 2010 Feb 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genomics Division, MS 84-171, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20173736" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta/pathology ; Cell Aging/genetics ; Cell Proliferation ; Cells, Cultured ; *Chromosome Deletion ; Chromosomes, Human, Pair 9/genetics ; Chromosomes, Mammalian/*genetics ; Coronary Artery Disease/*genetics/pathology ; Cyclin-Dependent Kinase Inhibitor p15/deficiency/genetics ; Cyclin-Dependent Kinase Inhibitor p16/deficiency/genetics ; Embryo, Mammalian/embryology ; Gene Expression Regulation/genetics ; Genetic Predisposition to Disease/genetics ; Humans ; Mice ; Myocytes, Smooth Muscle/pathology ; Survival Analysis
    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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    Stem cells: The blood balance (2010)
    Nature Publishing Group (NPG)
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    Publication Date: 2010-12-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Durand, Ellen M -- Zon, Leonard I -- England -- Nature. 2010 Dec 2;468(7324):644-5. doi: 10.1038/468644a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21124447" target="_blank"〉PubMed〈/a〉
    Keywords: AMP-Activated Protein Kinases/metabolism ; Animals ; Apoptosis ; Cell Cycle/*physiology ; Cell Proliferation ; Energy Metabolism/*physiology ; Hematopoiesis ; Hematopoietic Stem Cells/*cytology/*metabolism/pathology ; Homeostasis ; Mice ; Mitochondria/metabolism/pathology ; Multiprotein Complexes ; Pancytopenia/genetics ; Protein-Serine-Threonine Kinases/deficiency/genetics/*metabolism ; Proteins/metabolism ; TOR Serine-Threonine Kinases ; Transcription Factors/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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