基因工程研究睾丸肿瘤发生。
文章的细节
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引用
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燕W、烧伤KH Matzuk毫米
基因工程研究睾丸肿瘤发生。
学院。2003年1月,111 (1):174 - 81;讨论182 - 3。
- PubMed ID
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12760377 (在PubMed]
- 文摘
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在人类中,滋养细胞肿瘤睾丸肿瘤约占4%,和20%的这些都是恶性的。滋养细胞肿瘤发生的机制在很大程度上仍未知。利用基因敲除技术,我们以前生成的突变小鼠缺乏抑制素的α亚基二聚体。的抑制素alpha-null雄性小鼠睾丸支持细胞瘤发展外显率为100%。这些肿瘤发展年龄早在4周,造成cachexia-like消耗综合征。被阉割的抑制素α基因敲除小鼠性steroidogenic肾上腺皮质肿瘤的发展。这些研究已经确定了抑制素的分泌与特异性肿瘤抑制性腺和肾上腺。它被建议在滋养细胞肿瘤发生内分泌因素发挥作用通过改变细胞周期支持细胞的机械。测试这些因素的潜在函数作为滋养细胞肿瘤发生的修饰符,我们使用了一个遗传交叉策略,繁殖抑制素突变小鼠突变小鼠缺乏内分泌信号等因素促性腺激素释放激素(hypogonadal、高压天然气老鼠)、促卵泡激素,anti-Miillerian激素(抗苗勒氏管激素),激活素受体II型,或雄激素受体(tfm小鼠睾丸女性化),或老鼠——卵泡overexpressing过分生长。我们也调查失去至关重要的细胞周期调控的影响,如细胞周期蛋白依赖性激酶抑制剂p27、滋养细胞肿瘤发生在抑制素α基因敲除男性。 These studies clearly demonstrate the roles of these factors as modifiers of the Sertoli cell tumorigenesis. Activin signaling through activin receptor type II is responsible for the cachexia-like syndrome observed in the inhibin a knockout mice with tumors. The gonadotropin hormones are essential for testicular tumor development, but elevated FSH levels are not sufficient to cause Sertoli cell tumors. Absence of FSH, lack of androgen receptor, or overexpression of follistatin slows the tumor growth and minimizes the cachexia symptoms, thus prolonging the life span of these double mutant mice. In contrast, absence of AMH or p27 causes earlier onset and more aggressive development of testicular tumor, with an earlier death of double mutant mice. We are currently investigating roles of estrogen signaling pathways, and other cell cycle regulators, in tumor development in the inhibin alpha knockout mice by generating mice with double or triple mutations. Genetic engineering in mouse models provides a powerful tool to study the mechanisms of testicular tumorigenesis and define the important genetic modifiers in vivo.
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- 药物靶点
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药物 目标 类 生物 药理作用 行动 诺龙phenpropionate 雄性激素受体 蛋白质 人类 是的受体激动剂细节