Abstract
Background: Benign prostatic hyperplasia (BPH) is a histological disease characterised by an increased number of epithelial cells and stromal cells within the prostate gland. We investigated the effect of aqueous leaf extract of Ocimum gratissimum on BPH induced animal model.
 Methods: BPH was induced in male rats weighing 250-350 g through exogenous administration of testosterone and estradiol. A total of 30 rats were divided into five groups. One group was used as a control, and the other groups received subcutaneous injections of the two hormones. Groups 1 to 2 were treated orally with different doses of extract and group 3 received finasteride, group 4 was left untreated, and group 5 served as normal control. After forty-five days of treatment with the extract, the animals were sacrificed blood collected through cardiac puncture for biochemical analysis. The prostate glands were harvested and processed for paraffin embedding and stained with H and E.
 Results: Treatment with the extract and finasteride resulted in significant (P < 0.05) decrease in prostate-specific antigen (PSA), estradiol and prolactin and testosterone when compared to BPH control. Also, there was a significant increase in the protein content of the prostate gland when compared to BPH control. Prostate weight was significantly (P < 0.05) reduced in treated groups compared to BPH control. This was supported by the histological examination of the prostate gland. Conclusion: Therefore, Ocimum gratissimum was effective in reducing PSA, prolactin, testosterone, estradiol and prostate weight induced BPH in a rat model, and may be useful for the clinical treatment of patients with BPH.
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