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Luo, Jun, Wu, Yingbiao, Zhu, Xi, Wang, Saihua, Zhang, Xiaogang, Ning, Zhongping. (1401). LOXL2 silencing suppresses angiotensin II-induced cardiac hypertrophy through the EMT process and TGF-β1/Smad3/NF-κB pathway. , 25(8), 964-969. doi: 10.22038/ijbms.2022.63338.13981
Jun Luo; Yingbiao Wu; Xi Zhu; Saihua Wang; Xiaogang Zhang; Zhongping Ning. "LOXL2 silencing suppresses angiotensin II-induced cardiac hypertrophy through the EMT process and TGF-β1/Smad3/NF-κB pathway". , 25, 8, 1401, 964-969. doi: 10.22038/ijbms.2022.63338.13981
Luo, Jun, Wu, Yingbiao, Zhu, Xi, Wang, Saihua, Zhang, Xiaogang, Ning, Zhongping. (1401). 'LOXL2 silencing suppresses angiotensin II-induced cardiac hypertrophy through the EMT process and TGF-β1/Smad3/NF-κB pathway', , 25(8), pp. 964-969. doi: 10.22038/ijbms.2022.63338.13981
Luo, Jun, Wu, Yingbiao, Zhu, Xi, Wang, Saihua, Zhang, Xiaogang, Ning, Zhongping. LOXL2 silencing suppresses angiotensin II-induced cardiac hypertrophy through the EMT process and TGF-β1/Smad3/NF-κB pathway. , 1401; 25(8): 964-969. doi: 10.22038/ijbms.2022.63338.13981

LOXL2 silencing suppresses angiotensin II-induced cardiac hypertrophy through the EMT process and TGF-β1/Smad3/NF-κB pathway

Iranian Journal of Basic Medical Sciences
مقاله 5، دوره 25، شماره 8، آبان 2022، صفحه 964-969    اصل مقاله (583.24 K)
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.22038/ijbms.2022.63338.13981
نویسندگان
Jun Luo؛ Yingbiao Wu؛ Xi Zhu؛ Saihua Wang؛ Xiaogang Zhang؛ Zhongping Ning*
Department of Cardiology, Shanghai University of Medicine & Health Sciences affiliated Zhoupu Hospital, Shanghai 201318, China
چکیده
Objective(s): Atrial fibrillation (AF) is a common arrhythmia with atrial myocyte hypertrophy linked with stroke, heart failure, and increased mortality. Lysyl oxidase-like 2 (LOXL2) involves the cross-linking of collagen in the extracellular matrix (ECM). In the present study, we investigated the roles and underlying mechanisms of LOXL2 on cardiomyocyte hypertrophy. 
Materials and Methods: The expression of LOXL2 mRNA and protein were detected in angiotensin II (Ang II) treated rat cardiomyocytes H9c2 by RT-qPCR and western blot. Small interfering RNA (siRNA) mediated LOXL2 gene silencing was used to evaluate cardiac hypertrophy and related markers. Also, the protein expression of EMT markers and Smad3/NF-κB pathway was determined by western blot. 
Results: Ang II significantly increased mRNA and protein expressions of LOXL2 and increased mRNA levels of myocardial hypertrophy markers, including ANP, BNP, and β-MHC in H9c2 cells. Silencing of LOXL2 significantly suppressed Ang II-induced hypertrophy and reversed the increase in ANP, BNP, and β-MHC mRNA levels. Also, EMT markers’ expressions, as evidenced by increased E-cadherin and decreased vimentin, α-smooth muscle actin (α-SMA), fibroblast-specific protein (FSP), and collagen 1A1. Mechanistically, we found that LOXL2 silencing suppressed protein expressions of TGF-β1, p-Smad3, and p-NF-κB in Ang II-stimulated H9c2 cells. LOXL2 silencing also attenuated Ang II-induced increased expression and content of proinflammatory cytokines IL-1β (H) and TNF-α. 
Conclusion: Our data speculated that LOXL2 might be a potential contributing factor to Ang II-induced cardiac hypertrophy, and TGF-β1/Smad3/NF-κB is involved in a signal axis and might be a potential strategy in treating cardiac hypertrophy. 
کلیدواژه‌ها
Angiotensin II؛ Atrial fibrillation؛ Epithelial-mesenchymal - transition؛ Hypertrophy؛ LOXL2 protein
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