尿道下裂兔动物模型的建立

A rabbit model of hypospadias induced by finasteride

目的为尿道下裂的病因学研究提供实验依据。方法使用非那雄胺诱导建立兔尿道下裂动物模型。孕兔40只,随机分为5组。孕19天开始给予非那雄胺口服,10mg·kg-1·d-1,各组用药时间分别为0(A)、4(B)、5(C)、6(D)、7d(E),其中A组为对照组。出生后5周观察雄性幼兔有无尿道下裂;10周观察有无隐睾,分辨尿道下裂严重程度;解剖观察睾丸发育情况。结果A^E组子代尿道下裂发生率分别为0、22.2%、95.5%、85.2%、100.0%,根据外观将尿道下裂的严重程度分为3级。A^E组隐睾发生率分别为0、0、36.4%、40.7%、73.3%。结论应用非那雄胺可以诱导出稳定的雄性幼兔先天性尿道下裂模型。

Objective To establish a rabbit model of hypospadias finasteride to further stadying molecular mechanisma of hypospadias etiology. Methods forty pregnant new zealand rabbits were randomly divided into five groups. Finasteride was fed with 0days(group A), 4 days (group B), 5 days (group C), 6 days (group D), 7 days (group E) which began at GD(gestation days) 19, 10 mg·kg-1·d-1. The appearance of penis and the position of urethras orifice were exmamined to observe hypospadias on postnatal day 35; the second observation was performed to observe retained testicle and the Severity of hypospadias on postnatal day 70, all of the male rabbits were anatomized to observe the development of didymus. Results Hypospadias was seen in group A(0)、group B(22.2%)、group C(95.5%)、group D(85.2%)、group E(100%),and Severity of hypospadias can be divided into 3 degrees. Retained testicle was seen in group A(0)、group B(0)、group C(36.4%)、group D(40.7%)、group E(73.3%). Conclusions The experimental model of hypospadias induced by finasteride is stable.