Journal
IMMUNOLOGICAL REVIEWS
Volume 224, Issue -, Pages 201-214Publisher
WILEY
DOI: 10.1111/j.1600-065X.2008.00661.x
Keywords
IL-10; tolerance; autoimmunity; B cell; CD1d; CD5
Categories
Funding
- NCI NIH HHS [R01 CA105001, CA105001, CA96547, R01 CA096547] Funding Source: Medline
- NIAID NIH HHS [AI56363, U19 AI056363] Funding Source: Medline
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B cells positively regulate immune responses through antibody production and optimal CD4(+) T-cell activation. However, a specific and functionally important subset of B cells can also negatively regulate immune responses in mouse autoimmunity and inflammation models. The lack or loss of regulatory B cells has been demonstrated by exacerbated symptoms in experimental autoimmune encephalitis, chronic colitis, contact hypersensitivity, collagen-induced arthritis, and non-obese diabetic mouse models. Accumulating evidence suggests that B cells exert their regulatory role through the production of interleukin-10 (IL-10) by either B-1, marginal zone (MZ), or transitional 2-MZ precursor B-cell subsets. We have recently found that IL-10-producing regulatory B cells predominantly localize within a rare CD1d(hi)CD5(+) B-cell subset that shares cell surface markers with both B-1 and MZ B cells. We have labeled this specific subset of regulatory B cells as B10 cells to highlight that these rare CD1d(hi)CD5(+) B cells only produce IL-10 and are responsible for most IL-10 production by B cells and to distinguish them from other regulatory B-cell subsets that may also exist. This review focuses on the recent progress in this field and the exciting opportunities for understanding how this unique B-cell subset influences diverse immune functions.
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