1. Cigarette Smoke Induces Intestinal Inflammation via a Th17 Cell-Neutrophil Axis
- Author
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Myunghoo Kim, Bonhee Gu, Matthew C. Madison, Hyo Won Song, Kendra Norwood, Andrea A. Hill, Wan-Jung Wu, David Corry, Farrah Kheradmand, and Gretchen E. Diehl
- Subjects
lcsh:Immunologic diseases. Allergy ,0301 basic medicine ,Cell ,Immunology ,Disease ,03 medical and health sciences ,0302 clinical medicine ,Immune system ,neutrophils ,Smoke ,intestinal inflammation ,medicine ,Animals ,Immunology and Allergy ,Th17 cells ,Lung ,Original Research ,Mice, Knockout ,Gastrointestinal tract ,business.industry ,cigarette smoke ,Tobacco Products ,Colitis ,Neutrophilia ,3. Good health ,Intestines ,Mice, Inbred C57BL ,030104 developmental biology ,medicine.anatomical_structure ,Cytokines ,Female ,Interleukin 17 ,medicine.symptom ,lcsh:RC581-607 ,business ,lung-gut axis ,030215 immunology - Abstract
Epidemiological evidence finds cigarette smoking is a common risk factor for a number of diseases, not only in the lung but also in other tissues, such as the gastrointestinal tract. While it is well-documented that smoking directly drives lung inflammatory disease, how it promotes disease in peripheral tissues is incompletely understood. In this study, we utilized a mouse model of short-term smoke exposure and found increased Th17 cells and neutrophilia in the lung as well as in the circulation. Following intestinal inflammatory challenge, smoke exposed mice showed increased pathology which corresponds to enhanced intestinal Th17 cells, ILC3 and neutrophils within intestinal tissue. Using cellular depletion and genetic deficiencies, we define a cellular loop by which IL-17A and downstream neutrophils drive cigarette smoke-enhanced intestinal inflammation. Collectively, cigarette smoke induced local lung Th17 responses lead to increased systemic susceptibility to inflammatory insult through enhanced circulating neutrophils. These data demonstrate a cellular pathway by which inflammatory challenge in the lung can sensitize the intestine to enhanced pathological innate and adaptive immune responses.
- Published
- 2019
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