大豆异黄酮对大鼠前列腺增生抑制及一氧化氮、一氧化氮合酶表达的影响

Effects of soy bean isoflavone on inhibition of benign prostatic hyperplasia and the expressions of NO and NOS of rats

目的探讨补充不同剂量大豆异黄酮对大鼠前列腺增生水平及对一氧化氮(NO)与一氧化氮合酶(NOS)在前列腺中表达的影响。方法应用丙酸睾酮诱导大鼠前列腺增生,观察正常对照组、模型组、低剂量60mg/(kg·d)、中剂量120mg/(kg·d)及高剂量240mg/(kg·d)大豆异黄酮组大鼠前列腺的湿重、前列腺指数、肝系数及前列腺组织中NO、NOS、酸性磷酸酶(ACP)、前列腺酸性磷酸酶(PAP)、乳酸脱氢酶(LDH)等几种指标的水平。结果低、中、高剂量组大鼠前列腺湿重及前列腺指数均显著低于模型组(P<0.05);中剂量组大鼠前列腺湿重及前列腺指数均显著低于低剂量组(P<0.05)。各组肝系数、尿素氮、谷丙转氨酶无显著性差异。与处理组相比,低中高剂量组的NO、NOS、iNOS、cNOS表达水平显著升高,而ACP、PAP、LDH显著降低(均为P<0.05)。中剂量组效果最为明显。结论大豆异黄酮可显著抑制大鼠前列腺增生,提高前列腺组织中NO、NOS的水平。

Objective To explore the inhibitive effect of soybean isoflavone on the prostatic hyperplasia on the expressions of nitric oxid and nitric oxide synthase in the prostatic hyperplasia rats. Methods Subcutaneously injected testosterone propionate were to induce prostate hyperplasia in rats. The changes of prostate wet weight, prostatic index, liver index, the changes of some biochemical indexes in rat prostate tissue in the control and the treatment, the low, moderate, high dose groups of soybean isoflavone groups were observed. Results The prostate wet weight and prostatic index in all dose groups were merely lower than those in the treatment and the moderate groups were lowest in all dose group. There were no significant differences in liver index, urea nitrogen, glutamic-pyruvic transaminase of each group. Acid phosphatase, prostatic acid phosphatase and lactate dehydrogenase in all dose groups were merely lower than those in the treatment group. Nitric oxide and nitric oxide synthase in all dose groups were merely higher than those in the treatment group. Conclusion Soybean isoflavone could inhibits prostate hyperplasia and increase the expressions of nitric oxide and nitric oxide synthase in rats.