Heterogeneous nuclear ribonucleoprotein F suppresses angiotensinogen gene expression and attenuates hypertension and kidney injury in diabetic mice.
We investigated the impact of heterogeneous nuclear ribonucleoprotein F (hnRNP F) overexpression on angiotensinogen (Agt) gene expression, hypertension, and renal proximal tubular cell (RPTC) injury in high-glucose milieu both in vivo and in vitro. Diabetic Akita transgenic (Tg) mice specifically overexpressing hnRNP F in their RPTCs were created, and the effects on systemic hypertension, Agt gene expression, renal hypertrophy, and interstitial fibrosis were studied. We also examined immortalized rat RPTCs stably transfected with control plasmid or plasmid containing hnRNP F cDNA in vitro. The results showed that hnRNP F overexpression attenuated systemic hypertension, suppressed Agt and transforming growth factor-β1 (TGF-β1) gene expression, and reduced urinary Agt and angiotensin II levels, renal hypertrophy, and glomerulotubular fibrosis in Akita hnRNP F-Tg mice. In vitro, hnRNP F overexpression prevented the high-glucose stimulation of Agt and TGF-β1 mRNA expression and cellular hypertrophy in RPTCs. These data suggest that hnRNP F plays a modulatory role and can ameliorate hypertension, renal hypertrophy, and interstitial fibrosis in diabetes. The underlying mechanism is mediated, at least in part, via the suppression of intrarenal Agt gene expression in vivo. hnRNP F may be a potential target in the treatment of hypertension and kidney injury in diabetes.
Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Université de Montréal, Hôtel-Dieu Hospital, Montreal, Quebec, Canada.
Chao-Sheng
CS
Lo
Shiao-Ying
SY
Chang
Isabelle
I
Chenier
Janos G
JG
Filep
Julie R
JR
Ingelfinger
Shao Ling
SL
Zhang
John S D
JS
Chan
D000808:Angiotensinogen / Q000235:genetics* / Q000378:metabolism; D000818:Animals; D003921:Diabetes Mellitus, Experimental / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D003928:Diabetic Nephropathies / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D005355:Fibrosis / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D015870:Gene Expression; D034541:Heterogeneous-Nuclear Ribonucleoprotein Group F-H / Q000235:genetics / Q000378:metabolism*; D006973:Hypertension / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D007668:Kidney / Q000378:metabolism* / Q000473:pathology; D007674:Kidney Diseases / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D051379:Mice; D008822:Mice, Transgenic; D012084:Renin-Angiotensin System / Q000235:genetics; D053773:Transforming Growth Factor beta1 / Q000235:genetics / Q000378:metabolism
D034541:Heterogeneous-Nuclear Ribonucleoprotein Group F-H; D053773:Transforming Growth Factor beta1; D000808:Angiotensinogen