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Mesenchymal Stem Cell-Derived Exosomes Carry MicroRNA-125a to Protect Against Diabetic Nephropathy by Targeting Histone Deacetylase 1 and Downregulating Endothelin-1

Authors Hao Y, Miao J, Liu W, Cai K, Huang X, Peng L

Received 10 October 2020

Accepted for publication 1 February 2021

Published 25 March 2021 Volume 2021:14 Pages 1405—1418


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Antonio Brunetti

Yan Hao,1 Jie Miao,2 Wenjia Liu,1 Kangqin Cai,1 Xianli Huang,1 Li Peng1

1Department of Nephrology, The First People’s Hospital of Zigong, Zigong, 643000, Sichuan, People’s Republic of China; 2Department of Nephrology, The Health and Rehabilitation Vocational College of Sichuan, Zigong, 643000, Sichuan, People’s Republic of China

Correspondence: Yan Hao
Department of Nephrology, The First People’s Hospital of Zigong, No. 42, Shangyi Road, Daoshenghao Community, Ziliujing District, Zigong, 643000, Sichuan, People’s Republic of China
Tel/Fax +86-13990087106
Email [email protected]

Background: Mesenchymal stem cell (MSC)-derived exosomes have seen great advances in human disease control in a minimally invasive manner. This research aimed to explore the function of MSC-derived exosomes in diabetic nephropathy (DN) progression and the molecules involved.
Methods: A rat model with DN and rat glomerular mesangial cell (GMC) models treated with high glucose (HG) were established, which were treated with exosomes from adipose-derived-MSCs (adMSCs). The levels of blood glucose, serum creatinine, and urinary protein, the urine albumin-to-creatinine ratio (UACR), kidney weight/body weight, and mesangial hyperplasia and kidney fibrosis in rats were determined. The expression of interleukin-6 (IL-6), collagen I (Col. I), fibronectin (FN), Bax and Bcl-2 in HG-treated GMCs was assessed. The microRNA (miRNA) carried by adMSC-exosomes was identified, and the implicated down-stream molecules were analyzed.
Results: adMSC-derived exosomes decreased levels of blood glucose, serum creatinine, 24-h urinary protein, UACR and kidney weight/body weight, and they suppressed mesangial hyperplasia and kidney fibrosis in DN rats. The exosomes also suppressed levels of IL6, Col. I and FN in HG-treated GMCs and promoted cell apoptosis. miR-125a was at least partially responsible for the above protective events mediated by adMSC-exosomes. miR-125a directly bound to histone deacetylase 1 (HDAC1), while HDAC1 further regulated endothelin-1 (ET-1) activation. Up-regulation of HDAC1 blocked the functions of adMSC-exosomal miR-125a.
Conclusion: This study suggested that adMSC-derived exosomes inhibit DN progression and alleviate the symptoms by carrying miR-125a, during which HDAC1 and ET-1 were inhibited. This study may provide novel effects into DN treatment.

Keywords: exosomes, miR-125a, HDAC1, ET-1, diabetic nephropathy

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