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  • Mice  (11)
  • Molecular Sequence Data  (10)
  • EARTH RESOURCES AND REMOTE SENSING
  • GEOPHYSICS
  • 2005-2009  (19)
  • 1960-1964  (1)
  • 1
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    Cyclic dermal BMP signalling regulates stem cell activation during hair regeneration (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-01-19
    Description: In the age of stem cell engineering it is critical to understand how stem cell activity is regulated during regeneration. Hairs are mini-organs that undergo cyclic regeneration throughout adult life, and are an important model for organ regeneration. Hair stem cells located in the follicle bulge are regulated by the surrounding microenvironment, or niche. The activation of such stem cells is cyclic, involving periodic beta-catenin activity. In the adult mouse, regeneration occurs in waves in a follicle population, implying coordination among adjacent follicles and the extrafollicular environment. Here we show that unexpected periodic expression of bone morphogenetic protein 2 (Bmp2) and Bmp4 in the dermis regulates this process. This BMP cycle is out of phase with the WNT/beta-catenin cycle, thus dividing the conventional telogen into new functional phases: one refractory and the other competent for hair regeneration, characterized by high and low BMP signalling, respectively. Overexpression of noggin, a BMP antagonist, in mouse skin resulted in a markedly shortened refractory phase and faster propagation of the regenerative wave. Transplantation of skin from this mutant onto a wild-type host showed that follicles in donor and host can affect their cycling behaviours mutually, with the outcome depending on the equilibrium of BMP activity in the dermis. Administration of BMP4 protein caused the competent region to become refractory. These results show that BMPs may be the long-sought 'chalone' inhibitors of hair growth postulated by classical experiments. Taken together, results presented in this study provide an example of hierarchical regulation of local organ stem cell homeostasis by the inter-organ macroenvironment. The expression of Bmp2 in subcutaneous adipocytes indicates physiological integration between these two thermo-regulatory organs. Our findings have practical importance for studies using mouse skin as a model for carcinogenesis, intra-cutaneous drug delivery and stem cell engineering studies, because they highlight the acute need to differentiate supportive versus inhibitory regions in the host skin.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2696201/" 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/PMC2696201/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Plikus, Maksim V -- Mayer, Julie Ann -- de la Cruz, Damon -- Baker, Ruth E -- Maini, Philip K -- Maxson, Robert -- Chuong, Cheng-Ming -- R01 AR042177/AR/NIAMS NIH HHS/ -- R01 AR042177-13/AR/NIAMS NIH HHS/ -- R01 AR042177-14/AR/NIAMS NIH HHS/ -- R01 AR047364/AR/NIAMS NIH HHS/ -- R01 AR047364-05/AR/NIAMS NIH HHS/ -- R01 AR047364-06/AR/NIAMS NIH HHS/ -- England -- Nature. 2008 Jan 17;451(7176):340-4. doi: 10.1038/nature06457.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, California 90033, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18202659" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue/metabolism ; Animals ; Bone Morphogenetic Protein 2 ; Bone Morphogenetic Protein 4 ; Bone Morphogenetic Proteins/*metabolism ; Carrier Proteins/genetics/metabolism ; Dermis/cytology/*metabolism/transplantation ; Hair/cytology/*growth & development ; Hair Follicle/cytology/metabolism ; Mice ; Mice, Inbred Strains ; Regeneration/*physiology ; *Signal Transduction ; Stem Cells/*cytology/metabolism ; Transforming Growth Factor beta/*metabolism ; Wnt Proteins/metabolism ; beta Catenin/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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    Melanoma in mice casts doubt on scarcity of cancer stem cells (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-12-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Monya -- England -- Nature. 2008 Dec 4;456(7222):553. doi: 10.1038/456553a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19052589" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Count ; Cell Proliferation ; Cell Survival ; Humans ; Melanoma/drug therapy/*pathology ; Mice ; Neoplasm Transplantation ; Neoplastic Stem Cells/drug effects/*pathology/transplantation ; Regeneration
    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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  • 3
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    Nerve cells made from elderly patient's skin cells (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-08-08
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Monya -- England -- Nature. 2008 Aug 7;454(7205):675. doi: 10.1038/454675b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18685662" target="_blank"〉PubMed〈/a〉
    Keywords: Aged, 80 and over ; Amyotrophic Lateral Sclerosis/genetics/*pathology/surgery ; Animals ; Cellular Reprogramming ; Disease Models, Animal ; Female ; Humans ; Male ; Mice ; Neurons/*cytology/metabolism/transplantation ; Pluripotent Stem Cells/*cytology/metabolism/transplantation ; Skin/*cytology/metabolism ; Stem Cell Transplantation/contraindications
    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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  • 4
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    Cell therapy: being patient (2008)
    Nature Publishing Group (NPG)
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    Publication Date: 2008-10-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Monya -- England -- Nature. 2008 Oct 2;455(7213):586-8. doi: 10.1038/455586a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18833248" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell- and Tissue-Based Therapy ; Embryonic Stem Cells ; Graft Survival ; Humans ; Mice ; Pluripotent Stem Cells ; Regenerative Medicine ; Research Personnel ; *Stem Cell Transplantation
    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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    Virus-free pluripotency for human cells (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-03-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hayden, Erika Check -- Baker, Monya -- England -- Nature. 2009 Mar 5;458(7234):19. doi: 10.1038/458019a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19262639" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats ; Cellular Reprogramming/genetics/*physiology ; Dogs ; Genetic Vectors/adverse effects/genetics ; Humans ; Mice ; Mutagenesis, Insertional ; Pluripotent Stem Cells/*cytology/*metabolism/transplantation/virology ; Regenerative Medicine/*methods/trends ; Skin/cytology/metabolism ; Transposases/metabolism ; Viruses/genetics
    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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    How to fix a broken heart? (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Monya -- England -- Nature. 2009 Jul 2;460(7251):18-9. doi: 10.1038/460018a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19571848" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Clinical Trials as Topic ; Heart/embryology/growth & development ; Heart Diseases/*pathology/*therapy ; Homeodomain Proteins/metabolism ; Humans ; LIM-Homeodomain Proteins ; Mice ; Multipotent Stem Cells/cytology/metabolism/*transplantation ; Transcription Factors
    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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    Stem cells: Fast and furious (2009)
    Nature Publishing Group (NPG)
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    Publication Date: 2009-04-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Monya -- England -- Nature. 2009 Apr 23;458(7241):962-5. doi: 10.1038/458962a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19396119" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomedical Research/*trends ; Cellular Reprogramming/drug effects/*genetics/*physiology ; Competitive Behavior ; Drug Evaluation, Preclinical/methods/trends ; Embryonic Stem Cells/cytology/metabolism ; Female ; Humans ; Mice ; Pluripotent Stem Cells/*cytology/drug effects/*metabolism/pathology ; Safety ; Teratoma/pathology
    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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    Evolutionary history of Salmonella typhi (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-11-25
    Description: For microbial pathogens, phylogeographic differentiation seems to be relatively common. However, the neutral population structure of Salmonella enterica serovar Typhi reflects the continued existence of ubiquitous haplotypes over millennia. In contrast, clinical use of fluoroquinolones has yielded at least 15 independent gyrA mutations within a decade and stimulated clonal expansion of haplotype H58 in Asia and Africa. Yet, antibiotic-sensitive strains and haplotypes other than H58 still persist despite selection for antibiotic resistance. Neutral evolution in Typhi appears to reflect the asymptomatic carrier state, and adaptive evolution depends on the rapid transmission of phenotypic changes through acute infections.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2652035/" 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/PMC2652035/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roumagnac, Philippe -- Weill, Francois-Xavier -- Dolecek, Christiane -- Baker, Stephen -- Brisse, Sylvain -- Chinh, Nguyen Tran -- Le, Thi Anh Hong -- Acosta, Camilo J -- Farrar, Jeremy -- Dougan, Gordon -- Achtman, Mark -- 076962/Wellcome Trust/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2006 Nov 24;314(5803):1301-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Infektionsbiologie, Department of Molecular Biology, Chariteplatz 1, 10117 Berlin, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17124322" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Africa ; Alleles ; Anti-Bacterial Agents/pharmacology/therapeutic use ; Asia ; *Biological Evolution ; Carrier State/*microbiology ; DNA Gyrase/genetics ; Drug Resistance, Bacterial ; Drug Resistance, Multiple, Bacterial ; Fluoroquinolones/pharmacology/therapeutic use ; *Genes, Bacterial ; Genetic Variation ; Haplotypes ; Humans ; Molecular Sequence Data ; Mutation ; Polymorphism, Genetic ; Polymorphism, Single Nucleotide ; Salmonella typhi/drug effects/*genetics ; Selection, Genetic ; Typhoid Fever/drug therapy/*microbiology
    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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  • 9
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    Developmental biology. The Turing model comes of molecular age (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-12-02
    Description: 〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4383235/" 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/PMC4383235/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maini, Philip K -- Baker, Ruth E -- Chuong, Cheng-Ming -- R01 AR042177/AR/NIAMS NIH HHS/ -- R01 AR042177-11/AR/NIAMS NIH HHS/ -- R01 AR042177-12/AR/NIAMS NIH HHS/ -- R01 AR047364/AR/NIAMS NIH HHS/ -- R01 AR047364-04/AR/NIAMS NIH HHS/ -- R01 AR047364-05/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2006 Dec 1;314(5804):1397-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Mathematical Biology, University of Oxford, Oxford OX1 3LB, UK. maini@maths.ox.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17138885" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Body Patterning ; Diffusion ; Hair Follicle/*growth & development/metabolism ; Intercellular Signaling Peptides and Proteins/*metabolism ; Mathematics ; Mice ; *Models, Biological ; Signal Transduction ; Wnt Proteins/*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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  • 10
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    Stabilizing isopeptide bonds revealed in gram-positive bacterial pilus structure (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-12-08
    Description: Many bacterial pathogens have long, slender pili through which they adhere to host cells. The crystal structure of the major pilin subunit from the Gram-positive human pathogen Streptococcus pyogenes at 2.2 angstroms resolution reveals an extended structure comprising two all-beta domains. The molecules associate in columns through the crystal, with each carboxyl terminus adjacent to a conserved lysine of the next molecule. This lysine forms the isopeptide bonds that link the subunits in native pili, validating the relevance of the crystal assembly. Each subunit contains two lysine-asparagine isopeptide bonds generated by an intramolecular reaction, and we find evidence for similar isopeptide bonds in other cell surface proteins of Gram-positive bacteria. The present structure explains the strength and stability of such Gram-positive pili and could facilitate vaccine development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kang, Hae Joo -- Coulibaly, Fasseli -- Clow, Fiona -- Proft, Thomas -- Baker, Edward N -- New York, N.Y. -- Science. 2007 Dec 7;318(5856):1625-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland 1010, New Zealand.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18063798" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Asparagine/chemistry ; Chemistry, Physical ; Crystallography, X-Ray ; Fimbriae Proteins/*chemistry ; Fimbriae, Bacterial/*chemistry/ultrastructure ; Hydrogen Bonding ; Lysine/chemistry ; Models, Molecular ; Molecular Sequence Data ; Peptides/chemistry ; Physicochemical Phenomena ; Protein Conformation ; Protein Structure, Tertiary ; Protein Subunits/chemistry ; Streptococcus pyogenes/*chemistry/metabolism/*ultrastructure
    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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