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  • 1
    Publication Date: 1999-04-09
    Description: The Ca2+-activated protein phosphatase calcineurin induces apoptosis, but the mechanism is unknown. Calcineurin was found to dephosphorylate BAD, a pro-apoptotic member of the Bcl-2 family, thus enhancing BAD heterodimerization with Bcl-xL and promoting apoptosis. The Ca2+-induced dephosphorylation of BAD correlated with its dissociation from 14-3-3 in the cytosol and translocation to mitochondria where Bcl-xL resides. In hippocampal neurons, L-glutamate, an inducer of Ca2+ influx and calcineurin activation, triggered mitochondrial targeting of BAD and apoptosis, which were both suppressible by coexpression of a dominant-inhibitory mutant of calcineurin or pharmacological inhibitors of this phosphatase. Thus, a Ca2+-inducible mechanism for apoptosis induction operates by regulating BAD phosphorylation and localization in cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, H G -- Pathan, N -- Ethell, I M -- Krajewski, S -- Yamaguchi, Y -- Shibasaki, F -- McKeon, F -- Bobo, T -- Franke, T F -- Reed, J C -- AG-1593/AG/NIA NIH HHS/ -- CA-69381/CA/NCI NIH HHS/ -- HD25938/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Apr 9;284(5412):339-43.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Burnham Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10195903" target="_blank"〉PubMed〈/a〉
    Keywords: 14-3-3 Proteins ; Animals ; *Apoptosis ; Calcineurin/genetics/*metabolism ; Calcineurin Inhibitors ; Calcium/*metabolism/pharmacology ; Carrier Proteins/chemistry/*metabolism ; Cell Line ; Cells, Cultured ; Dimerization ; Enzyme Inhibitors/pharmacology ; Glutamic Acid/pharmacology ; Hippocampus/cytology ; Humans ; Mitochondria/metabolism ; Neurons/cytology/metabolism ; Phosphorylation ; Protein-Serine-Threonine Kinases/metabolism ; Proteins/metabolism ; Proto-Oncogene Proteins c-bcl-2/metabolism ; Rats ; Recombinant Fusion Proteins/metabolism ; Transfection ; *Tyrosine 3-Monooxygenase ; bcl-Associated Death Protein ; bcl-X Protein
    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
    Publication Date: 2000-07-15
    Description: p53 plays an essential pro-apoptotic role, a function thought to be shared with its family members p73 and p63. Here, we show that p73 is primarily present in developing neurons as a truncated isoform whose levels are dramatically decreased when sympathetic neurons apoptose after nerve growth factor (NGF) withdrawal. Increased expression of truncated p73 rescues these neurons from apoptosis induced by NGF withdrawal or p53 overexpression. In p73-/- mice, all isoforms of p73 are deleted and the apoptosis of developing sympathetic neurons is greatly enhanced. Thus, truncated p73 is an essential anti-apoptotic protein in neurons, serving to counteract the pro-apoptotic function of p53.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pozniak, C D -- Radinovic, S -- Yang, A -- McKeon, F -- Kaplan, D R -- Miller, F D -- New York, N.Y. -- Science. 2000 Jul 14;289(5477):304-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neuronal Survival, Brain Tumor Research Center, Montreal Neurological Institute, McGill University, Montreal, Canada H3A 2B4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10894779" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviridae/genetics ; Animals ; Apoptosis/*physiology ; Cells, Cultured ; DNA-Binding Proteins/biosynthesis/chemistry/*physiology ; Escherichia coli ; Genes, Tumor Suppressor ; Humans ; Mice ; Mice, Inbred BALB C ; Nerve Growth Factor/pharmacology ; Neurons/*physiology ; Nuclear Proteins/biosynthesis/chemistry/*physiology ; Protein Isoforms/biosynthesis/chemistry/physiology ; Recombinant Proteins ; Sympathetic Nervous System/cytology/*physiology ; Tumor Suppressor Protein p53/antagonists & inhibitors/*physiology ; Tumor Suppressor Proteins
    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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  • 3
    Publication Date: 2014-11-11
    Description: Lung diseases such as chronic obstructive pulmonary disease and pulmonary fibrosis involve the progressive and inexorable destruction of oxygen exchange surfaces and airways, and have emerged as a leading cause of death worldwide. Mitigating therapies, aside from impractical organ transplantation, remain limited and the possibility of regenerative medicine has lacked empirical support. However, it is clinically known that patients who survive sudden, massive loss of lung tissue from necrotizing pneumonia or acute respiratory distress syndrome often recover full pulmonary function within six months. Correspondingly, we recently demonstrated lung regeneration in mice following H1N1 influenza virus infection, and linked distal airway stem cells expressing Trp63 (p63) and keratin 5, called DASC(p63/Krt5), to this process. Here we show that pre-existing, intrinsically committed DASC(p63/Krt5) undergo a proliferative expansion in response to influenza-induced lung damage, and assemble into nascent alveoli at sites of interstitial lung inflammation. We also show that the selective ablation of DASC(p63/Krt5) in vivo prevents this regeneration, leading to pre-fibrotic lesions and deficient oxygen exchange. Finally, we demonstrate that single DASC(p63/Krt5)-derived pedigrees differentiate to type I and type II pneumocytes as well as bronchiolar secretory cells following transplantation to infected lung and also minimize the structural consequences of endogenous stem cell loss on this process. The ability to propagate these cells in culture while maintaining their intrinsic lineage commitment suggests their potential in stem cell-based therapies for acute and chronic lung diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zuo, Wei -- Zhang, Ting -- Wu, Daniel Zheng'An -- Guan, Shou Ping -- Liew, Audrey-Ann -- Yamamoto, Yusuke -- Wang, Xia -- Lim, Siew Joo -- Vincent, Matthew -- Lessard, Mark -- Crum, Christopher P -- Xian, Wa -- McKeon, Frank -- England -- Nature. 2015 Jan 29;517(7536):616-20. doi: 10.1038/nature13903. Epub 2014 Nov 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genome Institute of Singapore, A-STAR, 138672 Singapore. ; The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut 06032, USA. ; Advanced Cell Technologies, Marlborough, Massachusetts 01752, USA. ; The Jackson Laboratory, Bar Harbor, Maine 04609, USA. ; Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA. ; 1] Genome Institute of Singapore, A-STAR, 138672 Singapore [2] The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut 06032, USA [3] Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA [4] Department of Medicine, National University Health System, 119228 Singapore [5] Department of Genetics and Developmental Biology, University of Connecticut Health Center, Farmington, Connecticut 06030, USA. ; 1] Genome Institute of Singapore, A-STAR, 138672 Singapore [2] The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut 06032, USA [3] Department of Medicine, National University Health System, 119228 Singapore.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25383540" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bronchioles/cytology/virology ; Cell Differentiation ; Cell Lineage ; Cell Proliferation ; Dogs ; Humans ; Influenza A Virus, H1N1 Subtype/pathogenicity ; Keratin-5/*metabolism ; Lung/*cytology/pathology/*physiology/virology ; Madin Darby Canine Kidney Cells ; Mice ; Orthomyxoviridae Infections/metabolism/pathology/virology ; Oxygen/metabolism ; Pedigree ; Phosphoproteins/*metabolism ; Pneumonia/metabolism/pathology/virology ; Pulmonary Alveoli/cytology/pathology/virology ; Re-Epithelialization ; *Regeneration ; Stem Cell Transplantation ; Stem Cells/*cytology/*metabolism ; Trans-Activators/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
    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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  • 5
    ISSN: 0888-7543
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Current Opinion in Cell Biology 3 (1991), S. 82-86 
    ISSN: 0955-0674
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 262 (1999), S. 473-480 
    ISSN: 1617-4623
    Keywords: Key words DNA replication ; Cell cycle control ; Proteolysis ; SCF ; Cdc6p
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In fission yeast, overexpression of the replication initiator protein Cdc18p induces re-replication, a phenotype characterized by continuous DNA synthesis in the absence of cell division. In contrast, overexpression of Cdc6p, the budding yeast homolog of Cdc18p, does not cause re-replication in S. cerevisiae. However, we have found that Cdc6p has the ability to induce re-replication in fission yeast. Cdc6p cannot functionally replace Cdc18p, but instead interferes with the proteolysis of both Cdc18p and Rum1p, the inhibitor of the protein kinase Cdc2p. This activity of Cdc6p is entirely contained within a short N-terminal peptide, which forms a tight complex with Cdc2p and the F-box/WD-repeat protein Sud1p/Pop2p, a component of the SCFPop ubiquitin ligase in fission yeast. These interactions are mediated by two distinct regions within the N-terminal region of Cdc6p and depend on the integrity of its Cdc2p phosphorylation sites. The data suggest that disruption of re-replication control by overexpression of Cdc6p in fission yeast is a consequence of sequestration of Cdc2p and Pop2p, two factors involved in the negative regulation of Rum1p, Cdc18p and potentially other replication proteins.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 57 (2000), S. 411-420 
    ISSN: 1420-9071
    Keywords: Key words. NF-AT; nuclear factor of activated T cells; transcription factor; calcium; calcineurin; CRM1; casein kinase I; NLS; nuclear localization signal; NES; nuclear export signal.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The nuclear factors of activated T cells (NF-ATs) constitute a family of transcription factors that transduce calcium signals in the immune, cardiac, muscular and nervous systems. Like their distant relatives of the Rel family, including NF-κB, NF-ATs are cytoplasmic in resting cells and activated by means of induced nuclear import. Unlike NF-κB, however, NF-ATs show highly dynamic nuclear shuttling properties that have important implications for graded signaling by these molecules. This review focuses on recent advances in deciphering mechanisms by which calcium signaling regulates the nucleo-cytoplasmic shuttling and therefore transactivation functions of the NF-ATs. These discoveries highlight the interplay between nuclear import and export signals on NF-ATs, and the roles of the calcium-activated phosphatase calcineurin and NF-AT kinases in controlling the activity of these signals. They also reveal that NF-ATs, as well as other transcription factors controlled at the level of nuclear import, face the very real prospect of futile cycling across the nuclear envelope as a consequence of conflicting nuclear import and export signals. We discuss the molecular mechanisms by which calcineurin suppresses futile cycling, as well as the major challenges to our understanding of NF-AT signaling in diverse biological systems.
    Type of Medium: Electronic Resource
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  • 9
    Publication Date: 1994-04-26
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 10
    Publication Date: 2005-08-30
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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