Journal
AMERICAN JOURNAL OF PATHOLOGY
Volume 186, Issue 12, Pages 3176-3188Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ajpath.2016.08.012
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology [25461215, 25461216]
- Ministry of Health, Labour, and Welfare, Japan [H26-Nanchi-Ippan-042]
- Takeda Science Foundation
- Yukiko Ishibashi Memorial Foundation
- Aichi Kidney Foundation
- Grants-in-Aid for Scientific Research [25461216, 25461215] Funding Source: KAKEN
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Macrophages are multifunctional immune cells that may either drive or modulate disease pathogenesis, depending on the activated phenotype. In this study, we investigated the protective effects of CD206(+) M2 macrophages against nephrotoxic serum nephritis in mice. We found that these immunosuppressive macrophages, derived from bone marrow and stimulated with IL-4/IL-13 [CD206(+) M2 bone marrow-derived macrophages (M2BMMs)], protected against renal injury, decreased proteinuria, and diminished the infiltration of CD68(+) macrophages, neutrophils, and T cells into glomerular tissue. Comparable therapeutic results were obtained with CD206(+) M2 cells derived from induced pluripotent stem cells. Notably, CD206(+) M2BMMs, which retained an M2 signature, could elicit a switch of M1 to M2 phenotype in co-cultured macrophages. Moreover, these cells were found to induce the production of regulatory T cells in the spleen and renal draining lymph node. Accordingly, mRNA expression of the T helper 1 cytokines tumor necrosis factor-alpha, interferon-beta, interferon-gamma, and IL-12 was significantly reduced in kidneys from mice treated with CD206+ M2BMMs. Taken together, the data suggest that CD206(+) M2 may have therapeutic potential against antibody-mediated glomerular injury and presents its therapeutic value for the treatment of crescentic nephritis in humans.
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