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  • 1
    Publication Date: 2000-03-17
    Description: Allergic asthma is caused by the aberrant expansion in the lung of T helper cells that produce type 2 (TH2) cytokines and is characterized by infiltration of eosinophils and bronchial hyperreactivity. This disease is often triggered by mast cells activated by immunoglobulin E (IgE)-mediated allergic challenge. Activated mast cells release various chemical mediators, including prostaglandin D2 (PGD2), whose role in allergic asthma has now been investigated by the generation of mice deficient in the PGD receptor (DP). Sensitization and aerosol challenge of the homozygous mutant (DP-/-) mice with ovalbumin (OVA) induced increases in the serum concentration of IgE similar to those in wild-type mice subjected to this model of asthma. However, the concentrations of TH2 cytokines and the extent of lymphocyte accumulation in the lung of OVA-challenged DP-/- mice were greatly reduced compared with those in wild-type animals. Moreover, DP-/- mice showed only marginal infiltration of eosinophils and failed to develop airway hyperreactivity. Thus, PGD2 functions as a mast cell-derived mediator to trigger asthmatic responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Matsuoka, T -- Hirata, M -- Tanaka, H -- Takahashi, Y -- Murata, T -- Kabashima, K -- Sugimoto, Y -- Kobayashi, T -- Ushikubi, F -- Aze, Y -- Eguchi, N -- Urade, Y -- Yoshida, N -- Kimura, K -- Mizoguchi, A -- Honda, Y -- Nagai, H -- Narumiya, S -- New York, N.Y. -- Science. 2000 Mar 17;287(5460):2013-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, Kyoto University Faculty of Medicine, Kyoto 606-8501, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10720327" target="_blank"〉PubMed〈/a〉
    Keywords: Allergens/immunology ; Animals ; Asthma/immunology/metabolism/pathology/*physiopathology ; Bronchial Hyperreactivity ; Bronchoalveolar Lavage Fluid/cytology/immunology ; Crosses, Genetic ; Female ; Gene Targeting ; Humans ; Immunoglobulin E/blood ; Interferon-gamma/metabolism ; Interleukins/metabolism ; Lung/immunology/metabolism/pathology ; Lymphocytes/immunology ; Male ; Mast Cells/metabolism ; Mice ; Mice, Inbred C57BL ; Mucus/secretion ; Ovalbumin/immunology ; Prostaglandin D2/metabolism/*physiology ; *Receptors, Immunologic ; Receptors, Prostaglandin/genetics/metabolism/*physiology ; Respiratory Mucosa/secretion
    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: 2002-12-10
    Description: Spermatogenesis is a highly specialized process of cellular differentiation to produce spermatozoa. This differentiation process accompanies morphological changes that are controlled by a number of genes expressed in a stage-specific manner during spermatogenesis. Here we show that in mice, the absence of a testis-specific, cytoplasmic polyadenylate [poly(A)] polymerase, TPAP, results in the arrest of spermiogenesis. TPAP-deficient mice display impaired expression of haploid-specific genes that are required for the morphogenesis of germ cells. The TPAP deficiency also causes incomplete elongation of poly(A) tails of particular transcription factor messenger RNAs. Although the overall cellular level of the transcription factor TAF10 is unaffected, TAF10 is insufficiently transported into the nucleus of germ cells. We propose that TPAP governs germ cell morphogenesis by modulating specific transcription factors at posttranscriptional and posttranslational levels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kashiwabara, Shin-Ichi -- Noguchi, Junko -- Zhuang, Tiangang -- Ohmura, Ko -- Honda, Arata -- Sugiura, Shin -- Miyamoto, Kiyoko -- Takahashi, Satoru -- Inoue, Kimiko -- Ogura, Atsuo -- Baba, Tadashi -- New York, N.Y. -- Science. 2002 Dec 6;298(5600):1999-2002.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Applied Biochemistry, Institute of Basic Medical Sciences, University of Tsukuba, Tsukuba Science City, Ibaraki 305-8572, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12471261" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Cytoplasm/enzymology ; Female ; Gene Expression Regulation, Developmental ; Gene Targeting ; In Situ Nick-End Labeling ; Male ; Mice ; Mice, Inbred C57BL ; Mutation ; Nuclear Proteins/genetics/metabolism ; Organ Size ; Poly A/metabolism ; Polynucleotide Adenylyltransferase/genetics/*metabolism ; Protein Biosynthesis ; RNA, Messenger/*metabolism ; Spermatids/physiology ; Spermatocytes/physiology ; *Spermatogenesis ; Spermatozoa/*physiology ; Testis/*enzymology/metabolism ; Transcription Factors/genetics/metabolism ; Transcription, Genetic ; mRNA Cleavage and Polyadenylation Factors/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 3
    Publication Date: 2008-08-22
    Description: Interleukin (IL)-17-producing CD4(+) T lymphocytes (T(H)17 cells) constitute a subset of T-helper cells involved in host defence and several immune disorders. An intriguing feature of T(H)17 cells is their selective and constitutive presence in the intestinal lamina propria. Here we show that adenosine 5'-triphosphate (ATP) that can be derived from commensal bacteria activates a unique subset of lamina propria cells, CD70(high)CD11c(low) cells, leading to the differentiation of T(H)17 cells. Germ-free mice exhibit much lower concentrations of luminal ATP, accompanied by fewer lamina propria T(H)17 cells, compared to specific-pathogen-free mice. Systemic or rectal administration of ATP into these germ-free mice results in a marked increase in the number of lamina propria T(H)17 cells. A CD70(high)CD11c(low) subset of the lamina propria cells expresses T(H)17-prone molecules, such as IL-6, IL-23p19 and transforming-growth-factor-beta-activating integrin-alphaV and -beta8, in response to ATP stimulation, and preferentially induces T(H)17 differentiation of co-cultured naive CD4(+) T cells. The critical role of ATP is further underscored by the observation that administration of ATP exacerbates a T-cell-mediated colitis model with enhanced T(H)17 differentiation. These observations highlight the importance of commensal bacteria and ATP for T(H)17 differentiation in health and disease, and offer an explanation of why T(H)17 cells specifically present in the intestinal lamina propria.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Atarashi, Koji -- Nishimura, Junichi -- Shima, Tatsuichiro -- Umesaki, Yoshinori -- Yamamoto, Masahiro -- Onoue, Masaharu -- Yagita, Hideo -- Ishii, Naoto -- Evans, Richard -- Honda, Kenya -- Takeda, Kiyoshi -- England -- Nature. 2008 Oct 9;455(7214):808-12. doi: 10.1038/nature07240. Epub 2008 Aug 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Immune Regulation, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18716618" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism/*pharmacology ; Animals ; Antigens, CD11c/metabolism ; Antigens, CD70/metabolism ; Cell Differentiation/*drug effects ; Cells, Cultured ; Colitis/chemically induced/immunology/pathology ; Disease Models, Animal ; Feces/microbiology ; Female ; Germ-Free Life ; Immunoglobulin A/analysis/immunology ; Interleukin-17/genetics/immunology/metabolism ; Male ; Mice ; Mucous Membrane/*cytology/*drug effects/immunology/microbiology ; Receptors, Purinergic P2/metabolism ; T-Lymphocytes, Helper-Inducer/*cytology/*drug effects/immunology
    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: 2009-11-06
    Description: The activation of innate immune responses by nucleic acids is crucial to protective and pathological immunities and is mediated by the transmembrane Toll-like receptors (TLRs) and cytosolic receptors. However, it remains unknown whether a mechanism exists that integrates these nucleic-acid-sensing systems. Here we show that high-mobility group box (HMGB) proteins 1, 2 and 3 function as universal sentinels for nucleic acids. HMGBs bind to all immunogenic nucleic acids examined with a correlation between affinity and immunogenic potential. Hmgb1(-/-) and Hmgb2(-/-) mouse cells are defective in type-I interferon and inflammatory cytokine induction by DNA or RNA targeted to activate the cytosolic nucleic-acid-sensing receptors; cells in which the expression of all three HMGBs is suppressed show a more profound defect, accompanied by impaired activation of the transcription factors interferon regulatory factor 3 (IRF3) and nuclear factor (NF)-kappaB. The absence of HMGBs also severely impairs the activation of TLR3, TLR7 and TLR9 by their cognate nucleic acids. Our results therefore indicate a hierarchy in the nucleic-acid-mediated activation of immune responses, wherein the selective activation of nucleic-acid-sensing receptors is contingent on the more promiscuous sensing of nucleic acids by HMGBs. These findings may have implications for understanding the evolution of the innate immune system and for the treatment of immunological disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yanai, Hideyuki -- Ban, Tatsuma -- Wang, ZhiChao -- Choi, Myoung Kwon -- Kawamura, Takeshi -- Negishi, Hideo -- Nakasato, Makoto -- Lu, Yan -- Hangai, Sho -- Koshiba, Ryuji -- Savitsky, David -- Ronfani, Lorenza -- Akira, Shizuo -- Bianchi, Marco E -- Honda, Kenya -- Tamura, Tomohiko -- Kodama, Tatsuhiko -- Taniguchi, Tadatsugu -- England -- Nature. 2009 Nov 5;462(7269):99-103. doi: 10.1038/nature08512.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Graduate School of Medicine and Faculty of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19890330" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cytosol/immunology ; DNA/immunology ; HMGB Proteins/deficiency/genetics/*immunology/*metabolism ; HMGB1 Protein/deficiency/genetics/immunology/metabolism ; HMGB2 Protein/deficiency/genetics/immunology/metabolism ; Immunity, Innate/*immunology ; Interferon Regulatory Factor-3/metabolism ; Mice ; Mice, Inbred C57BL ; Models, Immunological ; NF-kappa B/metabolism ; Nucleic Acids/*immunology ; Nucleotides/chemistry/immunology/metabolism ; RNA/immunology ; Signal Transduction ; Toll-Like Receptors/immunology ; Virus Diseases/immunology/virology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 2009-07-22
    Description: Acquired uniparental disomy (aUPD) is a common feature of cancer genomes, leading to loss of heterozygosity. aUPD is associated not only with loss-of-function mutations of tumour suppressor genes, but also with gain-of-function mutations of proto-oncogenes. Here we show unique gain-of-function mutations of the C-CBL (also known as CBL) tumour suppressor that are tightly associated with aUPD of the 11q arm in myeloid neoplasms showing myeloproliferative features. The C-CBL proto-oncogene, a cellular homologue of v-Cbl, encodes an E3 ubiquitin ligase and negatively regulates signal transduction of tyrosine kinases. Homozygous C-CBL mutations were found in most 11q-aUPD-positive myeloid malignancies. Although the C-CBL mutations were oncogenic in NIH3T3 cells, c-Cbl was shown to functionally and genetically act as a tumour suppressor. C-CBL mutants did not have E3 ubiquitin ligase activity, but inhibited that of wild-type C-CBL and CBL-B (also known as CBLB), leading to prolonged activation of tyrosine kinases after cytokine stimulation. c-Cbl(-/-) haematopoietic stem/progenitor cells (HSPCs) showed enhanced sensitivity to a variety of cytokines compared to c-Cbl(+/+) HSPCs, and transduction of C-CBL mutants into c-Cbl(-/-) HSPCs further augmented their sensitivities to a broader spectrum of cytokines, including stem-cell factor (SCF, also known as KITLG), thrombopoietin (TPO, also known as THPO), IL3 and FLT3 ligand (FLT3LG), indicating the presence of a gain-of-function that could not be attributed to a simple loss-of-function. The gain-of-function effects of C-CBL mutants on cytokine sensitivity of HSPCs largely disappeared in a c-Cbl(+/+) background or by co-transduction of wild-type C-CBL, which suggests the pathogenic importance of loss of wild-type C-CBL alleles found in most cases of C-CBL-mutated myeloid neoplasms. Our findings provide a new insight into a role of gain-of-function mutations of a tumour suppressor associated with aUPD in the pathogenesis of some myeloid cancer subsets.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sanada, Masashi -- Suzuki, Takahiro -- Shih, Lee-Yung -- Otsu, Makoto -- Kato, Motohiro -- Yamazaki, Satoshi -- Tamura, Azusa -- Honda, Hiroaki -- Sakata-Yanagimoto, Mamiko -- Kumano, Keiki -- Oda, Hideaki -- Yamagata, Tetsuya -- Takita, Junko -- Gotoh, Noriko -- Nakazaki, Kumi -- Kawamata, Norihiko -- Onodera, Masafumi -- Nobuyoshi, Masaharu -- Hayashi, Yasuhide -- Harada, Hiroshi -- Kurokawa, Mineo -- Chiba, Shigeru -- Mori, Hiraku -- Ozawa, Keiya -- Omine, Mitsuhiro -- Hirai, Hisamaru -- Nakauchi, Hiromitsu -- Koeffler, H Phillip -- Ogawa, Seishi -- 2R01CA026038-30/CA/NCI NIH HHS/ -- England -- Nature. 2009 Aug 13;460(7257):904-8. doi: 10.1038/nature08240. Epub 2009 Jul 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Genomics Project, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19620960" target="_blank"〉PubMed〈/a〉
    Keywords: Allelic Imbalance ; Amino Acid Sequence ; Animals ; Base Sequence ; Chromosomes, Human, Pair 11/genetics ; Female ; *Genes, Tumor Suppressor ; Humans ; Leukemia, Myeloid/*genetics/metabolism/pathology ; Male ; Mice ; Mice, Knockout ; Mice, Nude ; Models, Molecular ; Molecular Sequence Data ; Mutant Proteins/chemistry/genetics/*metabolism ; Mutation ; NIH 3T3 Cells ; Neoplasm Transplantation ; Oncogenes/genetics ; Phosphorylation ; Protein Conformation ; Proto-Oncogene Proteins c-cbl/antagonists & ; inhibitors/chemistry/deficiency/*genetics/*metabolism ; Ubiquitination ; Uniparental Disomy/genetics ; ras Proteins/genetics/metabolism
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  • 6
    Publication Date: 2010-01-08
    Description: Retroviruses are the only group of viruses known to have left a fossil record, in the form of endogenous proviruses, and approximately 8% of the human genome is made up of these elements. Although many other viruses, including non-retroviral RNA viruses, are known to generate DNA forms of their own genomes during replication, none has been found as DNA in the germline of animals. Bornaviruses, a genus of non-segmented, negative-sense RNA virus, are unique among RNA viruses in that they establish persistent infection in the cell nucleus. Here we show that elements homologous to the nucleoprotein (N) gene of bornavirus exist in the genomes of several mammalian species, including humans, non-human primates, rodents and elephants. These sequences have been designated endogenous Borna-like N (EBLN) elements. Some of the primate EBLNs contain an intact open reading frame (ORF) and are expressed as mRNA. Phylogenetic analyses showed that EBLNs seem to have been generated by different insertional events in each specific animal family. Furthermore, the EBLN of a ground squirrel was formed by a recent integration event, whereas those in primates must have been formed more than 40 million years ago. We also show that the N mRNA of a current mammalian bornavirus, Borna disease virus (BDV), can form EBLN-like elements in the genomes of persistently infected cultured cells. Our results provide the first evidence for endogenization of non-retroviral virus-derived elements in mammalian genomes and give novel insights not only into generation of endogenous elements, but also into a role of bornavirus as a source of genetic novelty in its host.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2818285/" 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/PMC2818285/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Horie, Masayuki -- Honda, Tomoyuki -- Suzuki, Yoshiyuki -- Kobayashi, Yuki -- Daito, Takuji -- Oshida, Tatsuo -- Ikuta, Kazuyoshi -- Jern, Patric -- Gojobori, Takashi -- Coffin, John M -- Tomonaga, Keizo -- R37 CA 089441/CA/NCI NIH HHS/ -- R37 CA089441/CA/NCI NIH HHS/ -- R37 CA089441-09/CA/NCI NIH HHS/ -- England -- Nature. 2010 Jan 7;463(7277):84-7. doi: 10.1038/nature08695.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Virology, Research Institute for Microbial Diseases (BIKEN), Osaka University, Osaka 565-0871, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20054395" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Borna disease virus/genetics/physiology ; Bornaviridae/*genetics/physiology ; Cell Line ; Conserved Sequence/genetics ; Evolution, Molecular ; Genes, Viral/*genetics ; Genome/*genetics ; Host-Pathogen Interactions/genetics ; Humans ; Mammals/*genetics/*virology ; Models, Genetic ; Molecular Sequence Data ; Open Reading Frames/genetics ; Phylogeny ; Reverse Transcription ; Time Factors ; Virus Integration/*genetics
    Print ISSN: 0028-0836
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  • 7
    Publication Date: 2007-01-27
    Description: Vitamin A has diverse biological functions. It is transported in the blood as a complex with retinol binding protein (RBP), but the molecular mechanism by which vitamin A is absorbed by cells from the vitamin A-RBP complex is not clearly understood. We identified in bovine retinal pigment epithelium cells STRA6, a multitransmembrane domain protein, as a specific membrane receptor for RBP. STRA6 binds to RBP with high affinity and has robust vitamin A uptake activity from the vitamin A-RBP complex. It is widely expressed in embryonic development and in adult organ systems. The RBP receptor represents a major physiological mediator of cellular vitamin A uptake.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kawaguchi, Riki -- Yu, Jiamei -- Honda, Jane -- Hu, Jane -- Whitelegge, Julian -- Ping, Peipei -- Wiita, Patrick -- Bok, Dean -- Sun, Hui -- 5T32EY07026/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 2007 Feb 9;315(5813):820-5. Epub 2007 Jan 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, David Geffen School of Medicine at UCLA, 650 Charles E. Young Drive South, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17255476" target="_blank"〉PubMed〈/a〉
    Keywords: Acyltransferases/metabolism ; Amino Acid Sequence ; Animals ; Blood-Retinal Barrier ; COS Cells ; Cattle ; Cell Line ; Cell Line, Tumor ; Cell Membrane/metabolism ; Cercopithecus aethiops ; Embryonic Development ; Endocytosis ; Humans ; Molecular Sequence Data ; Mutation, Missense ; Pigment Epithelium of Eye/*metabolism ; Placenta/metabolism ; Receptors, Cell Surface/*metabolism ; Retinal Vessels/metabolism ; Retinol-Binding Proteins/*metabolism ; Spleen/metabolism ; Transfection ; Vitamin A/*metabolism
    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
    Publication Date: 2007-04-28
    Description: The oceanic biological pump drives sequestration of carbon dioxide in the deep sea via sinking particles. Rapid biological consumption and remineralization of carbon in the "twilight zone" (depths between the euphotic zone and 1000 meters) reduce the efficiency of sequestration. By using neutrally buoyant sediment traps to sample this chronically understudied realm, we measured a transfer efficiency of sinking particulate organic carbon between 150 and 500 meters of 20 and 50% at two contrasting sites. This large variability in transfer efficiency is poorly represented in biogeochemical models. If applied globally, this is equivalent to a difference in carbon sequestration of more than 3 petagrams of carbon per year.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Buesseler, Ken O -- Lamborg, Carl H -- Boyd, Philip W -- Lam, Phoebe J -- Trull, Thomas W -- Bidigare, Robert R -- Bishop, James K B -- Casciotti, Karen L -- Dehairs, Frank -- Elskens, Marc -- Honda, Makio -- Karl, David M -- Siegel, David A -- Silver, Mary W -- Steinberg, Deborah K -- Valdes, Jim -- Van Mooy, Benjamin -- Wilson, Stephanie -- New York, N.Y. -- Science. 2007 Apr 27;316(5824):567-70.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA. kbuesseler@whoi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17463282" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Carbon/metabolism ; Carbon Dioxide ; Copepoda/physiology ; *Ecosystem ; Food Chain ; Geologic Sediments/chemistry ; Hydrogen-Ion Concentration ; Pacific Ocean ; Phytoplankton/physiology ; *Seawater/chemistry ; Zooplankton/physiology
    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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  • 9
    Publication Date: 2011-01-06
    Description: CD4(+) T regulatory cells (T(regs)), which express the Foxp3 transcription factor, play a critical role in the maintenance of immune homeostasis. Here, we show that in mice, T(regs) were most abundant in the colonic mucosa. The spore-forming component of indigenous intestinal microbiota, particularly clusters IV and XIVa of the genus Clostridium, promoted T(reg) cell accumulation. Colonization of mice by a defined mix of Clostridium strains provided an environment rich in transforming growth factor-beta and affected Foxp3(+) T(reg) number and function in the colon. Oral inoculation of Clostridium during the early life of conventionally reared mice resulted in resistance to colitis and systemic immunoglobulin E responses in adult mice, suggesting a new therapeutic approach to autoimmunity and allergy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3969237/" 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/PMC3969237/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Atarashi, Koji -- Tanoue, Takeshi -- Shima, Tatsuichiro -- Imaoka, Akemi -- Kuwahara, Tomomi -- Momose, Yoshika -- Cheng, Genhong -- Yamasaki, Sho -- Saito, Takashi -- Ohba, Yusuke -- Taniguchi, Tadatsugu -- Takeda, Kiyoshi -- Hori, Shohei -- Ivanov, Ivaylo I -- Umesaki, Yoshinori -- Itoh, Kikuji -- Honda, Kenya -- R00 DK085329/DK/NIDDK NIH HHS/ -- R01 AI052359/AI/NIAID NIH HHS/ -- R01 AI056154/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2011 Jan 21;331(6015):337-41. doi: 10.1126/science.1198469. Epub 2010 Dec 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21205640" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/pharmacology ; Cecum/microbiology ; Cells, Cultured ; Clostridium/growth & development/*immunology ; Colitis/immunology/pathology/prevention & control ; Colon/*immunology/metabolism/*microbiology ; Feces/microbiology ; Forkhead Transcription Factors/metabolism ; Germ-Free Life ; Immunity, Innate ; Immunoglobulin E/biosynthesis ; Interleukin-10/immunology/metabolism ; Intestinal Mucosa/*immunology/metabolism ; Intestine, Small/immunology ; Metagenome ; Mice ; Mice, Inbred A ; Mice, Inbred BALB C ; Receptors, Pattern Recognition/physiology ; Specific Pathogen-Free Organisms ; T-Lymphocytes, Helper-Inducer/immunology ; T-Lymphocytes, Regulatory/*immunology/metabolism ; Transforming Growth Factor beta/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2013-11-15
    Description: Gut commensal microbes shape the mucosal immune system by regulating the differentiation and expansion of several types of T cell. Clostridia, a dominant class of commensal microbe, can induce colonic regulatory T (Treg) cells, which have a central role in the suppression of inflammatory and allergic responses. However, the molecular mechanisms by which commensal microbes induce colonic Treg cells have been unclear. Here we show that a large bowel microbial fermentation product, butyrate, induces the differentiation of colonic Treg cells in mice. A comparative NMR-based metabolome analysis suggests that the luminal concentrations of short-chain fatty acids positively correlates with the number of Treg cells in the colon. Among short-chain fatty acids, butyrate induced the differentiation of Treg cells in vitro and in vivo, and ameliorated the development of colitis induced by adoptive transfer of CD4(+) CD45RB(hi) T cells in Rag1(-/-) mice. Treatment of naive T cells under the Treg-cell-polarizing conditions with butyrate enhanced histone H3 acetylation in the promoter and conserved non-coding sequence regions of the Foxp3 locus, suggesting a possible mechanism for how microbial-derived butyrate regulates the differentiation of Treg cells. Our findings provide new insight into the mechanisms by which host-microbe interactions establish immunological homeostasis in the gut.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Furusawa, Yukihiro -- Obata, Yuuki -- Fukuda, Shinji -- Endo, Takaho A -- Nakato, Gaku -- Takahashi, Daisuke -- Nakanishi, Yumiko -- Uetake, Chikako -- Kato, Keiko -- Kato, Tamotsu -- Takahashi, Masumi -- Fukuda, Noriko N -- Murakami, Shinnosuke -- Miyauchi, Eiji -- Hino, Shingo -- Atarashi, Koji -- Onawa, Satoshi -- Fujimura, Yumiko -- Lockett, Trevor -- Clarke, Julie M -- Topping, David L -- Tomita, Masaru -- Hori, Shohei -- Ohara, Osamu -- Morita, Tatsuya -- Koseki, Haruhiko -- Kikuchi, Jun -- Honda, Kenya -- Hase, Koji -- Ohno, Hiroshi -- England -- Nature. 2013 Dec 19;504(7480):446-50. doi: 10.1038/nature12721. Epub 2013 Nov 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3]. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3] Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan [4]. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan [3]. ; RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan. ; Institute for Advanced Biosciences, Keio University, Yamagata 997-0052, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] Graduate School of Medical Life Science, Yokohama City University, Kanagawa 230-0045, Japan. ; Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan. ; The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan. ; Preventative Health National Research Flagship, CSIRO Food and Nutritional Sciences, South Australia 5000, Australia. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan [3] Graduate School of Medical Life Science, Yokohama City University, Kanagawa 230-0045, Japan. ; 1] Graduate School of Medical Life Science, Yokohama City University, Kanagawa 230-0045, Japan [2] RIKEN Center for Sustainable Resource Science, Kanagawa 230-0045, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan. ; 1] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3] PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Japan [4].〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24226770" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation/drug effects ; Adoptive Transfer ; Animals ; Butyrates/analysis/*metabolism/pharmacology ; *Cell Differentiation/drug effects ; Colitis/drug therapy/pathology ; Colon/cytology/*immunology/metabolism/*microbiology ; Conserved Sequence ; Female ; *Fermentation ; Forkhead Transcription Factors/genetics ; Germ-Free Life ; Histones/metabolism ; Homeostasis/drug effects ; Intestinal Mucosa/cytology/immunology ; Lymphocyte Count ; Magnetic Resonance Spectroscopy ; Male ; Metabolome ; Mice ; Promoter Regions, Genetic/drug effects ; *Symbiosis ; T-Lymphocytes, Regulatory/*cytology/drug effects/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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