IL-33 is produced by colon fibroblasts and differentially regulated in acute and chronic murine colitis
IL-33 is upregulated in ulcerative colitis and has a protective role in chemically-induced acute murine colitis. We aimed to determine whether IL-33 influences Il10 chronic colitis and its cellular source in health and during colitis. Il10 Il33 and Il10 Il33 littermates developed colitis of similar...
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Published in | Scientific reports Vol. 11; no. 1; pp. 9575 - 11 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
England
Nature Publishing Group
05.05.2021
Nature Publishing Group UK Nature Portfolio |
Subjects | |
Online Access | Get full text |
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Summary: | IL-33 is upregulated in ulcerative colitis and has a protective role in chemically-induced acute murine colitis. We aimed to determine whether IL-33 influences Il10
chronic colitis and its cellular source in health and during colitis. Il10
Il33
and Il10
Il33
littermates developed colitis of similar severity. Colon Il33 was induced in WT and Il10
mice exposed to DSS, but not in unchallenged Il10
mice with colitis. Il33-citrine reporter mice showed that Il33-citrine colocalized with α-smooth muscle actin
myofibroblasts and vimentin
fibroblasts in WT mice. Citrine
CD74
CD90
inflammatory fibroblasts were increased with DSS treatment. IL-1β induced Il33 expression in colon myofibroblasts, but colon Il33 expression did not differ between DSS-treated WT and Il1r1
mice. In conclusion, deficiency of IL-33 does not alter the severity of chronic colitis in Il10
mice. Induction of Il33 upon DSS exposure in WT and Il10
mice, but not in unchallenged Il10
mice, suggests epithelial injury induces colon IL-33. Fibroblasts are the primary colonic source of IL-33 and IL-33-expressing CD90
CD74
fibroblasts are increased during DSS-induced colitis. IL-1β induces Il33 in colon myofibroblasts in vitro, but signaling through the IL-1R1 is not necessary for induction of IL-33 in DSS-induced colitis. |
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ISSN: | 2045-2322 2045-2322 |
DOI: | 10.1038/s41598-021-89119-1 |