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  • 1
    Publication Date: 2015-06-05
    Description: Stem cells of the gastrointestinal tract, pancreas, liver and other columnar epithelia collectively resist cloning in their elemental states. Here we demonstrate the cloning and propagation of highly clonogenic, 'ground state' stem cells of the human intestine and colon. We show that derived stem-cell pedigrees sustain limited copy number and sequence variation despite extensive serial passaging and display exquisitely precise, cell-autonomous commitment to epithelial differentiation consistent with their origins along the intestinal tract. This developmentally patterned and epigenetically maintained commitment of stem cells is likely to enforce the functional specificity of the adult intestinal tract. Using clonally derived colonic epithelia, we show that toxins A or B of the enteric pathogen Clostridium difficile recapitulate the salient features of pseudomembranous colitis. The stability of the epigenetic commitment programs of these stem cells, coupled with their unlimited replicative expansion and maintained clonogenicity, suggests certain advantages for their use in disease modelling and regenerative medicine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Xia -- Yamamoto, Yusuke -- Wilson, Lane H -- Zhang, Ting -- Howitt, Brooke E -- Farrow, Melissa A -- Kern, Florian -- Ning, Gang -- Hong, Yue -- Khor, Chiea Chuen -- Chevalier, Benoit -- Bertrand, Denis -- Wu, Lingyan -- Nagarajan, Niranjan -- Sylvester, Francisco A -- Hyams, Jeffrey S -- Devers, Thomas -- Bronson, Roderick -- Lacy, D Borden -- Ho, Khek Yu -- Crum, Christopher P -- McKeon, Frank -- Xian, Wa -- AI09575504/AI/NIAID NIH HHS/ -- R01 AI095755/AI/NIAID NIH HHS/ -- England -- Nature. 2015 Jun 11;522(7555):173-8. doi: 10.1038/nature14484. Epub 2015 Jun 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut 06032, USA. ; 1] The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut 06032, USA [2] Department of Genetics and Developmental Biology, University of Connecticut Health Center, Farmington, Connecticut 06032, USA. ; Genome Institute of Singapore, Agency for Science, Technology and Research, 138672 Singapore. ; Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts 02118, USA. ; Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA. ; 1] Genome Institute of Singapore, Agency for Science, Technology and Research, 138672 Singapore [2] Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, 119228 Singapore. ; Department of Pediatrics, Division of Gastroenterology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA. ; Division of Digestive Diseases, Hepatology, and Nutrition, Connecticut Children's Medical Center, Hartford, Connecticut 06106, USA. ; Department of Medicine, University of Connecticut Health Center, Farmington, Connecticut 06032, USA. ; Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Department of Medicine, National University of Singapore, 119228 Singapore. ; 1] The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut 06032, USA [2] Genome Institute of Singapore, Agency for Science, Technology and Research, 138672 Singapore [3] Department of Medicine, National University of Singapore, 119228 Singapore [4] Multiclonal Therapeutics, Inc., Farmington, Connecticut 06032, USA. ; 1] The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut 06032, USA [2] Department of Genetics and Developmental Biology, University of Connecticut Health Center, Farmington, Connecticut 06032, USA [3] Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts 02118, USA [4] Department of Medicine, National University of Singapore, 119228 Singapore [5] Multiclonal Therapeutics, Inc., Farmington, Connecticut 06032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26040716" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Toxins/pharmacology ; Cell Differentiation/drug effects ; Cell Lineage ; Cells, Cultured ; Clone Cells/cytology/metabolism ; Clostridium difficile/physiology ; Colon/cytology/drug effects ; Enterocolitis, Pseudomembranous/microbiology/pathology ; Epigenesis, Genetic/genetics ; Epithelium/drug effects/metabolism ; Fetus/cytology ; Genomic Instability/genetics ; Humans ; Intestine, Small/cytology ; Intestines/*cytology/drug effects ; Organoids/cytology/growth & development ; 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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  • 2
    ISSN: 1615-6102
    Keywords: Cell cycle ; Microtubules ; Mitosis ; Schizosaccharomyces ; Spindle pole body
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Temperature-sensitive cell division cycle (cdc) mutants of the fission yeastSchizosaccharomyces pombe, previously characterized as defective in nuclear division were examined by thin section electron microscopy. All of the mutants failed to enter mitosis, rather they accumulated at one of four distinct terminal phenotypes. Class one were arrested with a nucleus rectangular in cross-section and a laterally situated spindle pole body (SPB). The second group had spherical or rectangular nuclei with a single SPB. The sole member of the third group wascdc 27. K 3, which had a spherical crenated nucleus with a single SPB from which microtubules emerged and extended into the cytoplasm. Allelic variants ofcdc 25 comprised the fourth group all of which displayed aberrant nuclear morphologies. Utilizing this ultrastructural data together with a knowledge of the transition points of these mutants a model for the interdependence of certain cell cycle event is proposed in which the initiation of DNA synthesis is uncoupled from the replication and separation of the SPB. This paper also provides new information on SPB structure inS. pombe. This is discussed in connection with the transient assembly of both spindle and cytoplasmic microtubules.
    Type of Medium: Electronic Resource
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