Overexpression of heterogeneous nuclear ribonucleoprotein F stimulates renal Ace-2 gene expression and prevents TGF-β1-induced kidney injury in a mouse model of diabetes
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Author
Lo, Chao-Sheng
Shi, Yixuan
Chang, Shiao-Ying
Abdo, Shaaban
Chenier, Isabelle
Filep, Janos G.
Zhang, Shao-Ling
Chan, John S. D.
Published Version
https://doi.org/10.1007/s00125-015-3700-yMetadata
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Lo, Chao-Sheng, Yixuan Shi, Shiao-Ying Chang, Shaaban Abdo, Isabelle Chenier, Janos G. Filep, Julie R. Ingelfinger, Shao-Ling Zhang, and John S. D. Chan. 2015. “Overexpression of heterogeneous nuclear ribonucleoprotein F stimulates renal Ace-2 gene expression and prevents TGF-β1-induced kidney injury in a mouse model of diabetes.” Diabetologia 58 (10): 2443-2454. doi:10.1007/s00125-015-3700-y. http://dx.doi.org/10.1007/s00125-015-3700-y.Abstract
Aims/hypothesis We investigated whether heterogeneous nuclear ribonucleoprotein F (hnRNP F) stimulates renal ACE-2 expression and prevents TGF-β1 signalling, TGF-β1 inhibition of Ace-2 gene expression and induction of tubulo-fibrosis in an Akita mouse model of type 1 diabetes. Methods: Adult male Akita transgenic (Tg) mice overexpressing specifically hnRNP F in their renal proximal tubular cells (RPTCs) were studied. Non-Akita littermates and Akita mice served as controls. Immortalised rat RPTCs stably transfected with plasmid containing either rat Hnrnpf cDNA or rat Ace-2 gene promoter were also studied. Results: Overexpression of hnRNP F attenuated systemic hypertension, glomerular filtration rate, albumin/creatinine ratio, urinary angiotensinogen (AGT) and angiotensin (Ang) II levels, renal fibrosis and profibrotic gene (Agt, Tgf-β1, TGF-β receptor II [Tgf-βrII]) expression, stimulated anti-profibrotic gene (Ace-2 and Ang 1–7 receptor [MasR]) expression, and normalised urinary Ang 1–7 level in Akita Hnrnpf-Tg mice as compared with Akita mice. In vitro, hnRNP F overexpression stimulated Ace-2 gene promoter activity, mRNA and protein expression, and attenuated Agt, Tgf-β1 and Tgf-βrII gene expression. Furthermore, hnRNP F overexpression prevented TGF-β1 signalling and TGF-β1 inhibition of Ace-2 gene expression. Conclusions/interpretation These data demonstrate that hnRNP F stimulates Ace-2 gene transcription, prevents TGF-β1 inhibition of Ace-2 gene transcription and induction of kidney injury in diabetes. HnRNP F may be a potential target for treating hypertension and renal fibrosis in diabetes. Electronic supplementary material The online version of this article (doi:10.1007/s00125-015-3700-y) contains peer-reviewed but unedited supplementary material, which is available to authorised users.Other Sources
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