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Int. J. Mol. Sci. 2012, 13(8), 9808-9825; doi:10.3390/ijms13089808
Article

Less Expression of Prohibitin Is Associated with Increased Paired Box 2 (PAX2) in Renal Interstitial Fibrosis Rats

1,†
, 2,†
, 1,*  and 1
1 Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China 2 Department of Cardiology/Geriatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
* Author to whom correspondence should be addressed.
Received: 30 May 2012 / Revised: 3 July 2012 / Accepted: 19 July 2012 / Published: 6 August 2012
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
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Abstract

Prohibitin (PHB) and paired box 2 (PAX2) are associated with the development of renal interstitial fibrosis (RIF). This study was performed to investigate whether or not the PHB could regulate the PAX2 gene expression in unilateral ureteral obstruction (UUO) in rats. Eighty Wistar male rats were randomly divided into two groups: sham operation group (SHO) and model group subjected to unilateral ureteral obstruction (GU), n = 40, respectively. The model was established by left ureteral ligation. Renal tissues were collected at 14-day and 28-day after surgery. RIF index, protein expression of PHB, PAX2, transforming growth factor-βl (TGF-β1), α-smooth muscle actin (α-SMA), collagen-IV (Col-IV), fibronectin (FN) or cleaved Caspase-3, and cell apoptosis index in renal interstitium, and mRNA expressions of PHB, PAX2 and TGF-β1 in renal tissue were detected. When compared with those in SHO group, expression of PHB (mRNA and protein) was significantly reduced, and expressions of PAX2 and TGF-β1 (protein and mRNA) were markedly increased in the GU group (each p < 0.01). Protein expressions of α-SMA, Col-IV, FN and cleaved Caspase-3, and RIF index or cell apoptosis index in the GU group were markedly increased when compared with those in the SHO group (each p < 0.01). The protein expression of PHB was negatively correlated with protein expression of PAX2, TGF-β1, α-SMA, Col-IV, FN or cleaved Caspase-3, and RIF index or cell apoptosis index (all p < 0.01). In conclusion, less expression of PHB is associated with increased PAX2 gene expression and RIF index in UUO rats, suggesting that increasing the PHB expression is a potential therapeutic target for prevention of RIF.
Keywords: prohibitin; PAX2; TGF-β1; renal interstitial fibrosis; cell apoptosis prohibitin; PAX2; TGF-β1; renal interstitial fibrosis; cell apoptosis
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Zhou, T.-B.; Zeng, Z.-Y.; Qin, Y.-H.; Zhao, Y.-J. Less Expression of Prohibitin Is Associated with Increased Paired Box 2 (PAX2) in Renal Interstitial Fibrosis Rats. Int. J. Mol. Sci. 2012, 13, 9808-9825.

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