期刊
PANCREAS
卷 40, 期 7, 页码 1120-1130出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/MPA.0b013e31821fc796
关键词
IgG4-related disease; autoimmune pancreatitis (AIP); regulatory T cells (Tregs); IgG4; IL-10; inducible costimulator (ICOS)
资金
- Ministry of Culture and Science of Japan [20590810, 23591017-0001]
- Minister of Labor and Welfare of Japan
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- CREST Japan Science and Technology Agency
- Grants-in-Aid for Scientific Research [20590810, 23591017] Funding Source: KAKEN
Objectives: Immunoglobulin G4 (IgG4)-related autoimmune pancreatitis (AIP) is a new clinical entity of pancreatic disorder. There are immunologic and histological abnormalities, including increased serum IgG4 levels and the infiltration of IgG4-positive plasmacytes. However, the role of IgG4 is unclear. Recently, regulatory T cells (Tregs) were reported to contribute to the development of various autoimmune diseases as well as in B-cell shifting to IgG4-producing plasmacytes. We studied Tregs in the pancreas and peripheral blood. Methods: We recruited 44 patients with IgG4-related AIP. For comparison, we recruited 37 patients with other pancreatic diseases and 27 healthy subjects as controls. We studied infiltrating cells in the pancreas by immunohistochemistry and analyzed inducible costimulator-positive Tregs and interleukin 10-positive Tregs in the peripheral blood by flow cytometry. Results: The ratio of Foxp3-positive cells to infiltrated mononuclear cells (Foxp3/Mono) in AIP patients was significantly higher than in patients with alcoholic chronic pancreatitis. In AIP, Foxp3/Mono and IgG4/Mono were positively correlated. Inducible costimulator-positive Tregs were significantly higher in AIP patients than in the patients with other pancreatic diseases and the healthy control group. Interleukin 10-positive Tregs were significantly higher in AIP patients than in the healthy control group. Conclusions: Increased quantities of inducible costimulator-positive Tregs may influence IgG4 production in IgG4-related AIP.
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