Early and delayed castrations confer a similar survival advantage in TRAMP mice
Early and delayed castrations confer a similar survival advantage in TRAMP mice作者机构：Department of Urology Peking University People＇s Hospital Beijing 100044 China
出 版 物：《Asian Journal of Andrology》 (亚洲男性学杂志（英文版）)
年 卷 期：2009年第11卷第3期
页 面：291-297页
核心收录：
学科分类：1007[医学-药学(可授医学、理学学位)] 100705[医学-微生物与生化药学] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 1001[医学-基础医学(可授医学、理学学位)] 100103[医学-病原生物学] 100401[医学-流行病与卫生统计学] 10[医学]
基 金：Acknowledgement This work was supported by the 'National Natural Science Foundation of China (Grant number 30571854) and the Scientific Research Foundation for the Returned Overseas Chinese Scholars State Education Ministry
主 题：castration prostate cancer survival TRAMP
摘 要：The most appropriate time to introduce androgen deprivation therapy for prostate cancer remains controversial. Our aim was to evaluate the effects of early versus delayed surgical castration on prostate cancer progression and survival in the transgenic adenocarcinoma of the mouse prostate （TRAMP） model. TRAMP mice were randomly divided into three groups： the early castration group （on which castration was performed at the age of 4 weeks）, the delayed castration group （on which castration was performed when abdominal tumours could be palpated）, and the sham-castrated group. Mice were monitored daily throughout their lives until cancer-related death or the develop- ment of an obviously moribund appearance, at which time the individual mouse was killed. Androgen receptor expression in prostate tumours was also evaluated. The results shows that the average lifespan in early castration, delayed castration and sham-castrated groups were 54.1 weeks, 59.9 weeks and 39.1 weeks, respectively. Both early castration and delayed castration conferred a statistically significant survival advantage when compared with the sham-castrated group （P 〈 0.001）. However, the difference in lifespan between the early castration group and the delayed castration group was not statistically significant （P = 0.85）. The increase in lifespan in the TRAMP mice that received either early or delayed castration correlated with lower G/B value （genitourinary tract weight/body weight） at death than the sham-castrated mice. In conclusion, early and delayed castrations in TRAMP mice pro- longed survival to a similar extent. This finding may provide a guide for clinical practice in prostate cancer therapy.
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