Cucurbitacin E glucoside from Citrullus colocynthis inhibits testosterone-induced benign prostatic hyperplasia in mice.

Benign prostatic hyperplasia (BPH) is a common disorder in men aged over 60 years and significantly contributes to the distressing lower urinary tract symptoms. Cucurbitacins are triterpene derivatives with diverse medicinal uses including prostate diseases. Cucurbitacin E glucoside was evaluated against testosterone-induced prostatic hyperplasia in mice. Our data indicate that it significantly inhibited the increase in prostate weight and prostate index. The compound ameliorated histopathological changes in prostatic architecture and inhibited the increase in glandular epithelial length induced by testosterone. These results were confirmed by decreased expression of cyclin D1 in prostatic tissues compared to those obtained from the testosterone-alone group. Also, it showed significant antioxidant activity as evidenced by inhibiting lipid peroxides accumulation, glutathione depletion and superoxide exhaustion. Further, it exhibited anti-inflammatory activity as it decreased cyclooxygenase-2 and interleukin-1β protein expression in prostatic tissues. Masson's trichrome staining of prostate sections indicated obvious antifibrotic activity that was supported by decreased α-smooth muscle actin expression. In conclusion, Cucurbitacin E glucoside inhibits testosterone-induced experimental BPH in mice due to, at least partly, its antiproliferative, antioxidant, anti-inflammatory, and antifibrotic effects.