Min Lu1, Xinglei Qin2, Jungong Yao1, Yuanyuan Yang1, Minghu Zhao1, Lin Sun1. 1. Department of Cardiology, Henan Provincial People's Hospital, School of Clinical Medicine, Henan University, Zhengzhou, China. 2. Department of Hepatobiliary Surgery, Henan Provincial People's Hospital, School of Clinical Medicine, Henan University, Zhengzhou, China.
Abstract
AIM: The imbalance of T helper (Th) 17/T regulatory (Treg) is involved in chronic heart failure (HF). The enzyme lysyl oxidase (LOX) contributes to myocardial fibrosis. This study was designed to decipher the regulatory mechanism of Th17/Treg on LOX expression and to validate whether Th17/Treg imbalance regulates myocardial fibrosis by modulating LOX expression. METHODS: Human cardiac fibroblasts (HCFs) were treated with angiotensin II (Ang II) and co-cultured with Th17 cells and Tregs which were polarized from control naïve CD4+ T cells. Th17 cells and Tregs were adoptively transferred into abdominal aortic coarctation-induced chronic HF rats to investigate the efficacy of Th17 and Treg infusions on myocardial fibrosis and HF. RESULTS: Th17/Treg imbalance (increased Th17 cells and decreased Tregs) was observed in HF patients. Th17 cells/Tregs aggravated/attenuated Ang II-induced upregulation of LOX and fibrosis-related indicators (MMP-2/9 and collagen I/III) in HCFs in vitro and abdominal aortic coarctation-induced myocardial fibrosis and HF in rats, by promoting/inhibiting LOX expression. Mechanistically, Th17 cells promoted LOX expression by activating the IL-17/ERK1/2-AP-1 pathway, while Tregs inhibited LOX expression by activating the IL-10/JAK1-STAT3 pathway. CONCLUSION: Increased Th17 cells and decreased Tregs aggravate myocardial fibrosis and HF by inducing LOX expression.
AIM: The imbalance of T helper (Th) 17/T regulatory (Treg) is involved in chronic heart failure (HF). The enzyme lysyl oxidase (LOX) contributes to myocardial fibrosis. This study was designed to decipher the regulatory mechanism of Th17/Treg on LOX expression and to validate whether Th17/Treg imbalance regulates myocardial fibrosis by modulating LOX expression. METHODS:Human cardiac fibroblasts (HCFs) were treated with angiotensin II (Ang II) and co-cultured with Th17 cells and Tregs which were polarized from control naïve CD4+ T cells. Th17 cells and Tregs were adoptively transferred into abdominal aortic coarctation-induced chronic HFrats to investigate the efficacy of Th17 and Treg infusions on myocardial fibrosis and HF. RESULTS: Th17/Treg imbalance (increased Th17 cells and decreased Tregs) was observed in HF patients. Th17 cells/Tregs aggravated/attenuated Ang II-induced upregulation of LOX and fibrosis-related indicators (MMP-2/9 and collagen I/III) in HCFs in vitro and abdominal aortic coarctation-induced myocardial fibrosis and HF in rats, by promoting/inhibiting LOX expression. Mechanistically, Th17 cells promoted LOX expression by activating the IL-17/ERK1/2-AP-1 pathway, while Tregs inhibited LOX expression by activating the IL-10/JAK1-STAT3 pathway. CONCLUSION: Increased Th17 cells and decreased Tregs aggravate myocardial fibrosis and HF by inducing LOX expression.
Authors: Tan Panpan; Du Yuchen; Shi Xianyong; Liu Meng; He Ruijuan; Dong Ranran; Zhang Pengyan; Li Mingxi; Xie Rongrong Journal: Cardiovasc Toxicol Date: 2022-07-25 Impact factor: 2.755
Authors: Chenyi Gong; Lei Chang; Xuan Sun; Yu Qi; Rong Huang; Ke Chen; Bin Wang; Lina Kang; Lian Wang; Biao Xu Journal: Stem Cell Res Ther Date: 2022-08-12 Impact factor: 8.079