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  • 1
    Publication Date: 2008-06-20
    Description: T helper (T(H)) cells constitute an important arm of the adaptive immune system because they coordinate defence against specific pathogens, and their unique cytokines and effector functions mediate different types of tissue inflammation. The recently discovered T(H)17 cells, the third subset of effector T helper cells, have been the subject of intense research aimed at understanding their role in immunity and disease. Here we review emerging data suggesting that T(H)17 cells have an important role in host defence against specific pathogens and are potent inducers of autoimmunity and tissue inflammation. In addition, the differentiation factors responsible for their generation have revealed an interesting reciprocal relationship with regulatory T (T(reg)) cells, which prevent tissue inflammation and mediate self-tolerance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bettelli, Estelle -- Korn, Thomas -- Oukka, Mohamed -- Kuchroo, Vijay K -- R01 AI073542/AI/NIAID NIH HHS/ -- R01 AI073542-01/AI/NIAID NIH HHS/ -- R01 AI073542-02/AI/NIAID NIH HHS/ -- R01 NS059996/NS/NINDS NIH HHS/ -- England -- Nature. 2008 Jun 19;453(7198):1051-7. doi: 10.1038/nature07036.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18563156" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Autoimmune Diseases/immunology/pathology ; Cytokines/immunology/metabolism ; Humans ; Interleukin-17/*immunology/*metabolism ; T-Lymphocytes, Helper-Inducer/classification/*cytology/*immunology/metabolism ; T-Lymphocytes, Regulatory/immunology ; 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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  • 2
    Publication Date: 2008-03-26
    Description: Regulatory T cells (T(reg)) expressing the transcription factor Foxp3 control the autoreactive components of the immune system. The development of T(reg) cells is reciprocally related to that of pro-inflammatory T cells producing interleukin-17 (T(H)17). Although T(reg) cell dysfunction and/or T(H)17 cell dysregulation are thought to contribute to the development of autoimmune disorders, little is known about the physiological pathways that control the generation of these cell lineages. Here we report the identification of the ligand-activated transcription factor aryl hydrocarbon receptor (AHR) as a regulator of T(reg) and T(H)17 cell differentiation in mice. AHR activation by its ligand 2,3,7,8-tetrachlorodibenzo-p-dioxin induced functional T(reg) cells that suppressed experimental autoimmune encephalomyelitis. On the other hand, AHR activation by 6-formylindolo[3,2-b]carbazole interfered with T(reg) cell development, boosted T(H)17 cell differentiation and increased the severity of experimental autoimmune encephalomyelitis in mice. Thus, AHR regulates both T(reg) and T(H)17 cell differentiation in a ligand-specific fashion, constituting a unique target for therapeutic immunomodulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Quintana, Francisco J -- Basso, Alexandre S -- Iglesias, Antonio H -- Korn, Thomas -- Farez, Mauricio F -- Bettelli, Estelle -- Caccamo, Mario -- Oukka, Mohamed -- Weiner, Howard L -- AI435801/AI/NIAID NIH HHS/ -- NS38037/NS/NINDS NIH HHS/ -- P01 NS038037/NS/NINDS NIH HHS/ -- R01 AI073542/AI/NIAID NIH HHS/ -- R01 AI073542-01/AI/NIAID NIH HHS/ -- R01 AI073542-02/AI/NIAID NIH HHS/ -- R01 NS059996/NS/NINDS NIH HHS/ -- R01AI073542-01/AI/NIAID NIH HHS/ -- England -- Nature. 2008 May 1;453(7191):65-71. doi: 10.1038/nature06880. Epub 2008 Mar 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18362915" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carbazoles/metabolism/pharmacology ; *Cell Differentiation ; Encephalomyelitis, Autoimmune, Experimental/chemically induced/immunology ; Forkhead Transcription Factors/genetics/metabolism ; Humans ; Indoles/metabolism/pharmacology ; Interleukin-17/*metabolism ; Ligands ; Mice ; Mice, Inbred C57BL ; Receptors, Aryl Hydrocarbon/genetics/*metabolism ; T-Lymphocytes, Helper-Inducer/*cytology/drug effects/*metabolism ; T-Lymphocytes, Regulatory/*cytology/drug effects/*metabolism ; Tetrachlorodibenzodioxin/metabolism/pharmacology ; Transforming Growth Factor beta1/immunology/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
    Publication Date: 2008-05-13
    Description: The recent discovery of CD4(+) T cells characterized by secretion of interleukin (IL)-17 (T(H)17 cells) and the naturally occurring regulatory FOXP3(+) CD4 T cell (nT(reg)) has had a major impact on our understanding of immune processes not readily explained by the T(H)1/T(H)2 paradigm. T(H)17 and nT(reg) cells have been implicated in the pathogenesis of human autoimmune diseases, including multiple sclerosis, rheumatoid arthritis, inflammatory bowel disease and psoriasis. Our recent data and the work of others demonstrated that transforming growth factor-beta (TGF-beta) and IL-6 are responsible for the differentiation of naive mouse T cells into T(H)17 cells, and it has been proposed that IL-23 may have a critical role in stabilization of the T(H)17 phenotype. A second pathway has been discovered in which a combination of TGF-beta and IL-21 is capable of inducing differentiation of mouse T(H)17 cells in the absence of IL-6 (refs 6-8). However, TGF-beta and IL-6 are not capable of differentiating human T(H)17 cells and it has been suggested that TGF-beta may in fact suppress the generation of human T(H)17 cells. Instead, it has been recently shown that the cytokines IL-1beta, IL-6 and IL-23 are capable of driving IL-17 secretion in short-term CD4(+) T cell lines isolated from human peripheral blood, although the factors required for differentiation of naive human CD4 to T(H)17 cells are still unknown. Here we confirm that whereas IL-1beta and IL-6 induce IL-17A secretion from human central memory CD4(+) T cells, TGF-beta and IL-21 uniquely promote the differentiation of human naive CD4(+) T cells into T(H)17 cells accompanied by expression of the transcription factor RORC2. These data will allow the investigation of this new population of T(H)17 cells in human inflammatory disease.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2760130/" 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/PMC2760130/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, Li -- Anderson, David E -- Baecher-Allan, Clare -- Hastings, William D -- Bettelli, Estelle -- Oukka, Mohamed -- Kuchroo, Vijay K -- Hafler, David A -- P01 AI039671/AI/NIAID NIH HHS/ -- P01 AI039671-14/AI/NIAID NIH HHS/ -- P01 NS038037/NS/NINDS NIH HHS/ -- P01 NS038037-080006/NS/NINDS NIH HHS/ -- R01 AI073542/AI/NIAID NIH HHS/ -- R01 AI073542-01/AI/NIAID NIH HHS/ -- R01 AI073542-02/AI/NIAID NIH HHS/ -- R01 AI073542-03/AI/NIAID NIH HHS/ -- R37 NS024247/NS/NINDS NIH HHS/ -- R37 NS024247-20/NS/NINDS NIH HHS/ -- U19 AI070352/AI/NIAID NIH HHS/ -- U19 AI070352-03/AI/NIAID NIH HHS/ -- England -- Nature. 2008 Jul 17;454(7202):350-2. doi: 10.1038/nature07021. Epub 2008 May 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Immunology, Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18469800" target="_blank"〉PubMed〈/a〉
    Keywords: *Cell Differentiation ; Cell Line ; Cells, Cultured ; Gene Expression Regulation ; Humans ; Interleukin-17/metabolism ; Interleukins/*metabolism ; Nuclear Receptor Subfamily 1, Group F, Member 3 ; T-Lymphocytes, Helper-Inducer/*cytology/*metabolism ; Transcription Factors/genetics/metabolism ; Transforming Growth Factor beta1/*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
  • 5
    Publication Date: 2010-07-26
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 6
    Publication Date: 2005-03-24
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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