Abstract:
OBJECTIVE:Atherosclerosis is a chronic inflammatory disease regulated by T lymphocyte subsets. Recently, CD4(+) CD25(+) Foxp3(+) regulatory T (Treg) cells and Th17 cells have been described as two distinct subsets and have the opposite effects on autoimmunity. Clinical observation has revealed that the Th17/Treg imbalance exists in patients with acute coronary syndrome. We investigated whether the Th17/Treg functional imbalance existed during atherogenesis in ApoE(-/-) mice. METHODS AND RESULTS:Th17/Treg functions at different levels including cell frequencies, related cytokine secretion and key transcription factors were investigated comparatively between ApoE(-/-) mice and their age-matched C57BL/6J mice. The results demonstrated that ApoE(-/-) mice revealed significantly increased secretion of Th17 related cytokines (IL-17 and IL-6) and expression of transcription factor (RORgammat) levels and obviously decreased number in Treg cells, secretion of Treg related cytokines (TGF-beta(1)) and expression of transcription factor (Foxp3) levels as compared with age-matched C57BL/6J mice. Th17 related mediators reached their maximum expression values at the early stage (8-16weeks of age) in ApoE(-/-) mice, and then followed by continuous depression of their expression levels. Meanwhile, the expression of Treg related mediators was much lower in ApoE(-/-) mice than in their age-matched wild-type littermates. CONCLUSIONS:Th17/Treg functional imbalance exists during atherogenesis in ApoE(-/-) mice, suggesting a potential role of Th17/Treg imbalance in the formation and progression of atherosclerosis.
journal_name
Cytokinejournal_title
Cytokineauthors
Xie JJ,Wang J,Tang TT,Chen J,Gao XL,Yuan J,Zhou ZH,Liao MY,Yao R,Yu X,Wang D,Cheng Y,Liao YH,Cheng Xdoi
10.1016/j.cyto.2009.09.007subject
Has Abstractpub_date
2010-02-01 00:00:00pages
185-93issue
2eissn
1043-4666issn
1096-0023pii
S1043-4666(09)00828-Xjournal_volume
49pub_type
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