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As expanded understanding of molecular tumor characteristics, which drive renal cancer growth and progression gives a promising future for renal carcinoma therapy. The objective of the present study was designed to examine the effect of β-sitosterol on a rat model of experimental renal carcinogenesis. Renal carcinogenesis was induced in rats treated with N-diethylnitrosamine (DEN; 200 mg/kg bw single i.p., injection) and ferric nitrilotriacetate (Fe-NTA; 9 mg Fe/kg bw i.p., twice a week for 16 weeks). β-sitosterol pretreatment (20 mg/kg bw in 0.1 % carboxymethyl cellulose (CMC) p.o., thrice a week for 24 weeks) was started 2 weeks before the exposure to carcinogens. Expression of angiogenesis marker (VEGF), proliferative markers (cyclin D1, PCNA) and apoptotic markers (Bcl-2, Bax, caspase-3 and caspase-9) were analyzed to assess the anti-cancer potential of β-sitosterol in renal carcinogenesis model. mRNA and protein expression changes were determined by qRT-PCR, Western blotting, ELISA technique and immunohistochemistry. Our results showed that oral administration of β-sitosterol pretreatment significantly ( P  &lt; 0.05) reversed the expression of all the above mentioned markers and histological features which have been modified by renal carcinogen. It is concluded that, the protective effects of β-sitosterol against renal cancer is associated with the induction of apoptosis and the inhibition of cellular proliferation.

Modulation of Angiogenesis, Proliferative Response and Apoptosis by β-Sitosterol in Rat Model of Renal Carcinogenesis