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在前列腺癌中,KBTBD11的损失促进了AKT的过度激活和治疗脆弱性

Haoyue Sheng^1,2,3, Guohai Shi^1,2, Yawen Lu⁴

¹Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China.

|September 22, 2025

概括

前列腺癌中KBTBD11基因的丢失增加了AKT酸化,推动了瘤的生长. 这种缺陷造成了可被AKT抑制剂利用的脆弱性,建议KBTBD11作为向治疗的预测生物标志物.

科学领域:

在瘤学瘤学.
分子生物学分子生物学
生物化学生物化学

背景情况:

PI3K-AKT通路在癌症中经常失调,包括前列腺癌.
驱动这种异常激活的机制和有效的准策略仍然不清楚.

研究的目的:

调查 KBTBD11 E3 泛素酶在调节前列腺癌中 AKT 信号传递中的作用.
确定KBTBD11作为前列腺癌治疗的潜在治疗标或生物标志物.

主要方法:

分析前列腺癌患者样本中的KBTBD11基因删除频率.
与 KBTBD11 状态相关的 AKT 酸化水平的评估.
调查 KBTBD11 在 AKT 无化中的作用 (K27 链 vs K63 链链).
评估KBTBD11缺乏对前列腺癌细胞生长的效应,在体外和体内.
在KBTBD11缺陷前列腺癌模型中测试AKT抑制剂的疗效.

主要成果:

在人类前列腺癌中,KBTBD11基因经常被删除.
KBTBD11的损失导致前列腺癌细胞和患者组织中AKT酸化的增加.
KBTBD11促进AKT的K27结合多基化,抑制其激活,同时对抗K63结合多基化和化.
KBTBD11缺乏会增加前列腺癌细胞的增殖,但会使瘤对AKT抑制剂产生敏感性.

结论:

KBTBD11通过K27链接的多基化作用,作为AKT信号的上游抑制剂.
KBTBD11删除是指导前列腺癌AKT抑制剂治疗的潜在生物标志物.
用抑制剂向AKT通路是治疗KBTBD11缺乏前列腺癌的可行策略.

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