Abstract
This study aimed to evaluate the inhibitory effects and explore mechanisms of chlorogenic acid against testosterone-induced benign prostatic hyperplasia (BPH) in mice. Benign prostatic hyperplasia model was induced in experimental groups by daily subcutaneous injections of testosterone propionate (7.5mg/kg/d) consecutively for 14 d. A total of 60 mice were randomly divided into six groups: (Group 1) normal control group, (Group 2) benign prostatic hyperplasia model control group, (Group 3) benign prostatic hyperplasia mice treated with finasteride at a dose of 1mg/kg, (Group 4) benign prostatic hyperplasia mice treated with chlorogenic acid at dose levels of 0.8mg/kg (low dose group), (Group 5) benign prostatic hyperplasia mice treated with chlorogenic acid at dose levels of 1.6mg/kg (medium dose group) and (Group 6) benign prostatic hyperplasia mice treated with chlorogenic acid at dose levels of 3.2mg/kg (high dose group). Animals were sacrificed on the scheduled termination, pick out the eyeball to get blood, then prostates were weighed and prostatic index were determined. Then the serum acid phosphatase (ACP), prostatic acid phosphatase (PACP) and typeⅡ5-alpha-reductase (SRD5A2) levels were measured and observed morphological changes of the prostate. Comparing with benign prostatic hyperplasia model group, the high and medium dose of chlorogenic acid could significantly reduce prostate index and levels of acid phosphatase, prostatic acid phosphatase and typeⅡ5-alpha-reductase (P<0.05 or P<0.01). These findings were supported by histopathological observations of prostate tissues. Histopathological examination also indicated that chlorogenic acid treatment at the high and medium doses inhibited testosterone-induced prostatic hyperplasia. The results indicated that chlorogenic acid exhibited restraining effect on benign prostatic hyperplasia model animals, and its mechanism might be related to inhibit typeⅡ5-alpha reductase activity.
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