Abstract Title:

Apigenin Attenuates Experimental Autoimmune Myocarditis by Modulating Th1/Th2 Cytokine Balance in Mice.

Abstract Source:

Inflammation. 2015 Dec 11. Epub 2015 Dec 11. PMID: 26658748

Abstract Author(s):

Shouxin Zhang, Xiaoyan Liu, Chengming Sun, Jun Yang, Lihong Wang, Jie Liu, Lei Gong, Yanyan Jing

Article Affiliation:

Shouxin Zhang


This study aims to investigate the protective effect of apigenin on the development of experimental autoimmune myocarditis (EAM) and the underlying mechanisms. An EAM model was induced in BALB/c mice by the injection of porcine cardiac myosin. Apigenin was orally administered from day 1 to 21. The severity of myocarditis was assessed by determination of heart weight/body weight ratio (HW/BW) and histopathological evaluation. Echocardiography was conducted to evaluate the cardiac function and heart structure. Antigen-specific T cell proliferation responses to cardiac myosin were evaluated by the lymphocyte proliferation assay. ELISA was used to determine serum levels of type 1 helper (Th1) and Th2 cytokines. Apigenin treatment significantly decreased HW/BW. Histopathologic analysis showed that the infiltration of inflammatory cells was reduced significantly by apigenin treatment. Meanwhile, apigenin administration effectively ameliorated autoimmune myocarditis-induced cardiac hypertrophy and cardiac dysfunction as well as inhibited lymphocyte proliferation in mice immunized with myosin. Furthermore, Th1 cytokines tumor necrosis factor-alpha (TNF-α), interferon-gamma (IFN-γ), and interleukin-2 (IL-2) were significantly downregulated, while Th2 cytokines IL-4 and IL-10 were markedly upregulated. The results indicated that apigenin can alleviate EAM due to its immunomodulatory reactions in modification of helper T cell balance.

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