期刊
JOURNAL OF CELLULAR PHYSIOLOGY
卷 228, 期 7, 页码 1577-1583出版社
WILEY-BLACKWELL
DOI: 10.1002/jcp.24319
关键词
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资金
- Fondation de France, the Comite Mixte de Cooperation Universitaire (CMCU)
- German Research Foundation, DFG
Vascular cells are particularly susceptible to oxidative stress that is believed to play a key role in the pathogenesis of cardiovascular disorders. Thioredoxin-1 (Trx-1) is an oxidative stress-limiting protein with anti-inflammatory and anti-apoptotic properties. In contrast, its truncated form (Trx-80) exerts pro-inflammatory effects. Here we analyzed whether Trx-80 might exert atherogenic effects by promoting macrophage differentiation into the M1 pro-inflammatory phenotype. Trx-80 at 1 mu g/ml significantly attenuated the polarization of anti-inflammatory M2 macrophages induced by exposure to either IL-4 at 15ng/ml or IL-4/IL-13 (10ng/ml each) in vitro, as evidenced by the expression of the characteristic markers, CD206 and IL-10. By contrast, in LPS-challenged macrophages, Trx-80 significantly potentiated the differentiation into inflammatory M1 macrophages as indicated by the expression of the M1 cytokines, TNF- and MCP-1. When Trx-80 was administered to hyperlipoproteinemic ApoE2.Ki mice at 30 mu g/g body weight (b.w.) challenged either with LPS at 30 mu g/30g (b.w.) or IL-4 at 500ng/30g (b.w.), it significantly induced the M1 phenotype but inhibited differentiation of M2 macrophages in thymus and liver. When ApoE2.Ki mice were challenged once weekly with LPS for 5 weeks, they showed severe atherosclerotic lesions enriched with macrophages expressing predominantly M1 over M2 markers. Such effect was potentiated when mice received daily, in addition to LPS, the Trx-80. Moreover, the Trx-80 treatment led to a significantly increased aortic lesion area. The ability of Trx-80 to promote differentiation of macrophages into the classical proinflammatory phenotype may explain its atherogenic effects in cardiovascular diseases. J. Cell. Physiol. 228: 15771583, 2013. (c) 2013 Wiley Periodicals, Inc.
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