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蛋白质体活动和池异质性的关联与确定乳腺癌分子亚型的标记物

Irina Kondakova¹, Elena Sereda^1,2, Evgeniya Sidenko^1,2

¹Tomsk National Research Medical Center, Cancer Research Institute, Russian Academy of Sciences, 634009 Tomsk, Russia.

|January 11, 2025

概括

乳腺癌亚型表现出不同的蛋白酶子单元表达和活性水平. 蛋白质酶活性与Ki67和激素受体状态相关,这表明乳腺癌的新治疗点.

科学领域:

分子生物学分子生物学
癌症研究癌症研究
生物化学生物化学

背景情况:

蛋白质体对于细胞内蛋白质降解至关重要.
特定的蛋白酶体抑制剂用于癌症治疗.
乳腺癌 (BC) 治疗策略是由瘤亚型标记物,如Ki67,HER-2和激素受体指导的.
蛋白质酶形式和BC亚型之间的关系还不太清楚.

研究的目的:

调查蛋白质酶活性和表达与BC亚型标记物之间的关联.
为了分析各种BC亚型的蛋白酶子单元基因表达.
探索蛋白质体异质性及其与BC分子特征的相关性.

主要方法:

在19145个BC样本中对蛋白酶子单元 (PSMB1-10) 基因表达的生物信息分析.
定量PCR (qPCR) 用于评估BC细胞系中的蛋白质组异质性.
西方涂抹以确定BC组织和细胞系中的蛋白酶组合.
化基质用于测量蛋白酶体活动.
免疫组织化学定义BC分子亚型.

主要成果:

在BC亚型中观察到不同的蛋白酶子单元表达模式,具有强烈的PSMB8-10相关性.
与邻近组织相比,BC组织中托素和卡斯帕斯类蛋白酶活性显著增加.
在不同的BC亚型中,蛋白质组子单元的组成各不相同.
回归分析显示,蛋白质酶活动与Ki67的表达,雌激素受体和孕激素受体之间存在正相关性.

结论:

乳腺癌亚型在蛋白酶组合和活性上表现出显著的差异.
观察到的蛋白质酶活性,Ki67和激素受体之间的相关性表明存在潜在的相互作用.
这些发现可能会指导开发针对特定蛋白酶体通路的乳腺癌新型组合疗法.

关键词:

在 Ki6767 的位置上.乳腺癌乳腺癌乳腺癌卡斯帕斯酶类活动.它具有类似于化学的活性.雌激素受体的受体是雌激素受体.免疫蛋白质组中的免疫蛋白质组.孕激素受体孕激素受体

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