医学
纤维化
车站3
心力衰竭
肌肉肥大
白细胞介素
STAT蛋白
心功能曲线
心脏纤维化
内科学
细胞因子
内分泌学
激活剂(遗传学)
细胞生物学
信号转导
炎症
受体
生物
作者
Yunzhao Yang,Xu Cheng,Shaoqun Tang,Zhongyuan Xia
标识
DOI:10.1016/j.cjca.2020.01.011
摘要
Background Previous studies have demonstrated that inflammation is closely related to the occurrence and development of heart failure (HF). As an inflammation-related cytokine, interleukin (IL)-9 has been reported to be involved in the development of cardiovascular diseases. However, the role of IL-9 in HF in response to isoproterenol (ISO) stimulation has barely been explored. Thus, this study aimed to investigate whether IL-9 participates in HF and the possible associated mechanisms. Methods Chronic ISO infusion was used to establish an HF model, and the IL-9 levels in mice and isolated cardiomyocytes were measured. In addition, ISO-treated mice received an injection of recombinant mouse IL-9 (rIL-9) or an antimouse IL-9 neutralizing monoclonal antibody (mAb) to investigate the effects of IL-9 on cardiac function, hypertrophy, and fibrosis. Results IL-9 levels were significantly increased in mice and isolated cardiomyocytes after ISO treatment. Treatment with rIL-9 resulted in aggravated cardiac dysfunction and amplified cardiac hypertrophy and fibrosis, whereas treatment with the anti-IL-9 neutralizing mAb ameliorated cardiac dysfunction and reduced cardiac hypertrophy and fibrosis in ISO-treated mice. In addition, ISO infusion–induced cardiac inflammation and cardiomyocyte apoptosis was aggravated by rIL-9 but prevented by the anti-IL-9 mAb. IL-9 did not activate signal transducer and activator of transcription (STAT)1 or STAT5 but induced STAT3 phosphorylation in ISO-induced HF. Moreover, S31-201, a specific STAT3 inhibitor, nearly abolished rIL-9-induced increases in cardiac dysfunction, hypertrophy, and fibrosis in response to ISO stimulation. Conclusions IL-9 aggravated cardiac dysfunction and amplified cardiac hypertrophy and fibrosis in the ISO-induced HF model by activating STAT3 signalling. These data indicate that blocking IL-9 may be an attractive pharmacotherapeutic strategy for the treatment of cardiac hypertrophy and fibrosis induced by chronic β-adrenergic receptor activation to limit the progression of HF.
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