PAR2 在控制 PAR4 中起着不可或缺的作用 致癌性:β-catenin-p53轴
Priyanga Appasamy1, Jeetendra Kumar Nag1, Hodaya Malka1
1Sharett Institute of Oncology, Hadassah-Hebrew University Medical Center, Jerusalem 91120, Israel.
International journal of molecular sciences
|March 27, 2025
概括
蛋白酶激活受体2 (PAR2) 通过与PAR4合作,驱动癌症生长. 抑制 PAR2 的信号块 PAR4 的信号块.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 与G蛋白结合的受体信号传递
背景情况:
- G-蛋白结合受体 (GPCR) 在癌症中起作用,但针对GPCR的治疗方法并不常见.
- 蛋白酶激活受体 (PARs) 是GPCR的一个子组,包括PAR1-4. PAR2在癌症中的作用,特别是它与 PAR4 的相互作用,需要进一步阐明.
研究的目的:
- 为了研究PAR2在癌症中对PAR4的优势作用.
- 评估PAR2对PAR4瘤功能的影响.
- 评估针对PAR2信号的治疗潜力.
主要方法:
- 基因敲除PAR2 (f2rl1) 和表达一个非信号截断的PAR2 (TrPAR2).
- 在裸体小鼠中评估β-catenin稳定,免疫沉和异种移植瘤形成.
- 评估PAR2/PAR4诱导的信号通路,包括DVL1和TOPflash报告员活动.
- 对细胞入侵,迁移和PAR2特异性抑制剂Pc(4-4) 的作用的分析.
主要成果:
- PAR2 和 PAR4 协作促进瘤生成.
- 阻断PAR2或TrPAR2表达抑制了PAR2/PAR4诱导的β-catenin水平,核DVL1和TOPflash活动.
- 通过PAR2敲击或TrPAR2.2,可以抑制PAR2和PAR4介导的入侵和迁移.
- PAR2抑制剂Pc(4-4) 通过增加p53和p21水平并激活caspase-3而有效抑制了PAR2的致癌活性.
- 在没有PAR2信号的情况下,PAR4的前瘤功能被显著抑制.
结论:
- 在癌症中,PAR2信号传递对PAR4的前瘤功能至关重要.
- 在驱动瘤发生过程中,PAR2比PAR4具有主导作用.
- PAR2抑制剂Pc(4-4) 通过向PAR2信号,调节p53,并抑制瘤生长,显示出治疗潜力.
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