Publication Date:
2011-10-15
Description:
The mammalian intestine is home to ~100 trillion bacteria that perform important metabolic functions for their hosts. The proximity of vast numbers of bacteria to host intestinal tissues raises the question of how symbiotic host-bacterial relationships are maintained without eliciting potentially harmful immune responses. Here, we show that RegIIIgamma, a secreted antibacterial lectin, is essential for maintaining a ~50-micrometer zone that physically separates the microbiota from the small intestinal epithelial surface. Loss of host-bacterial segregation in RegIIIgamma(-/-) mice was coupled to increased bacterial colonization of the intestinal epithelial surface and enhanced activation of intestinal adaptive immune responses by the microbiota. Together, our findings reveal that RegIIIgamma is a fundamental immune mechanism that promotes host-bacterial mutualism by regulating the spatial relationships between microbiota and host.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3321924/" 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/PMC3321924/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vaishnava, Shipra -- Yamamoto, Miwako -- Severson, Kari M -- Ruhn, Kelly A -- Yu, Xiaofei -- Koren, Omry -- Ley, Ruth -- Wakeland, Edward K -- Hooper, Lora V -- R01 DK070855/DK/NIDDK NIH HHS/ -- R01 DK070855-06/DK/NIDDK NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2011 Oct 14;334(6053):255-8. doi: 10.1126/science.1209791.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21998396" target="_blank"〉PubMed〈/a〉
Keywords:
Adaptive Immunity
;
Animals
;
Anti-Bacterial Agents/pharmacology
;
Bacterial Load
;
Gram-Negative Bacteria/immunology/*physiology
;
Gram-Positive Bacteria/immunology/*physiology
;
Homeostasis
;
Immunoglobulin A/analysis
;
Intestinal Mucosa/immunology/*microbiology
;
Intestine, Small/immunology/*microbiology
;
Lectins, C-Type/physiology
;
*Metagenome
;
Mice
;
Mice, Inbred C57BL
;
Mice, Transgenic
;
Myeloid Differentiation Factor 88/genetics/metabolism
;
Proteins/*metabolism
;
Symbiosis
;
T-Lymphocytes, Helper-Inducer/immunology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
