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在三阴性乳腺癌中,SCF^βTrCP介导的SHARP1降解

Juliana Haydeé Enriqué Steinberg¹, Fabiana Alejandra Rossi^2,3, Roberto Magliozzi⁴

¹Department of Biotechnology, University of Verona, Strada Le Grazie 15, 37134, Verona, Italy.

Cell death & disease

|November 8, 2023

概括

分裂和毛发相关蛋白1 (SHARP1) 抑制三阴性乳腺癌转移. 通过SCF^βTrCP针对其降解可能为这种侵略性癌症提供了一个新的治疗策略.

科学领域:

在瘤学瘤学.
分子生物学分子生物学
癌症转移癌症转移

背景情况:

三阴性乳腺癌 (TNBC) 是具有高转移率和复发率的侵袭性乳腺癌.
转录因子SHARP1通过抑制缺氧诱导因素来抑制TNBC转移.
在乳腺癌中,SHARP1的丧失与患者生存率差的相关性.

研究的目的:

调查控制TNBC中SHARP1稳定的监管机制.
探索针对SHARP1降解作为TNBC治疗策略的潜力.

主要方法:

研究了SHARP1蛋白的稳定性和降解途径.
确定了E3泛基因酶SCF^βTrCP作为SHARP1.1的一个关键调节器.
使用色降解基映射 (Ser240,Glu245) 来了解SHARP1的无处不在和降解.
在TNBC的临床前小鼠模型中使用了不可降解的SHARP1突变 (S240A/E245A).

主要成果:

SHARP1是一种不稳定的蛋白质,是SCF^βTrCP对蛋白质体降解的向.
SHARP1的降解由光降解子 (Ser240,Glu245) 介导,这对无处不在至关重要.
具有表达非降解SHARP1的TNBC细胞的小鼠显示瘤生长减少和无瘤存活率增加.

结论:

通过βTrCP介导的蛋白质体降解,SHARP1的稳定性受到严格的调节.
抑制βTrCP依赖的SHARP1降解可能是TNBC的新治疗方法.
稳定SHARP1可能是对抗TNBC转移和改善患者治疗结果的有希望的策略.

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