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  • 1
    Publication Date: 2016-04-30
    Description: Microbial colonization of mucosal tissues during infancy plays an instrumental role in the development and education of the host mammalian immune system. These early-life events can have long-standing consequences: facilitating tolerance to environmental exposures or contributing to the development of disease in later life, including inflammatory bowel disease, allergy, and asthma. Recent studies have begun to define a critical period during early development in which disruption of optimal host-commensal interactions can lead to persistent and in some cases irreversible defects in the development and training of specific immune subsets. Here, we discuss the role of early-life education of the immune system during this "window of opportunity," when microbial colonization has a potentially critical impact on human health and disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gensollen, Thomas -- Iyer, Shankar S -- Kasper, Dennis L -- Blumberg, Richard S -- DK0034854/DK/NIDDK NIH HHS/ -- DK44319/DK/NIDDK NIH HHS/ -- R21 AI090102/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2016 Apr 29;352(6285):539-44. doi: 10.1126/science.aad9378.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Gastroenterology, Hepatology, and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. ; Division of Immunology, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA, USA. ; Division of Gastroenterology, Hepatology, and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. rblumberg@partners.org.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27126036" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Asthma/immunology/microbiology ; Humans ; Hypersensitivity/immunology/microbiology ; Immune System/*immunology ; Immune Tolerance ; Infant, Newborn ; Inflammatory Bowel Diseases/immunology/microbiology ; Intestinal Mucosa/*immunology/*microbiology ; Microbiota/*immunology ; Natural Killer T-Cells/immunology ; Symbiosis ; T-Lymphocyte Subsets/immunology
    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: 2019
    Description: 〈p〉Immunoglobulin A (IgA) is the major secretory immunoglobulin isotype found at mucosal surfaces, where it regulates microbial commensalism and excludes luminal factors from contacting intestinal epithelial cells (IECs). IgA is induced by both T cell–dependent and –independent (TI) pathways. However, little is known about TI regulation. We report that IEC endoplasmic reticulum (ER) stress induces a polyreactive IgA response, which is protective against enteric inflammation. IEC ER stress causes TI and microbiota-independent expansion and activation of peritoneal B1b cells, which culminates in increased lamina propria and luminal IgA. Increased numbers of IgA-producing plasma cells were observed in healthy humans with defective autophagy, who are known to exhibit IEC ER stress. Upon ER stress, IECs communicate signals to the peritoneum that induce a barrier-protective TI IgA response.〈/p〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Location Call Number Expected Availability
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