在上腺皮癌中IGF1R和IR表达和定位的新兴作用
Rosa Catalano1, Emma Nozza1,2, Barbara Altieri3
1Department of Clinical Sciences and Community Health, University of Milan, 20122, Milan, Italy.
Cell communication and signaling : CCS
|March 4, 2025
概括
胰岛素样生长因子2 (IGF2) 驱动上腺皮癌 (ACC) 的生长. 向胰岛素受体异型A (IRA) 和IGF2受体 (IGF1R) 可能为ACC患者提供新的治疗方法.
科学领域:
- 内分泌学 在内分泌学.
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 胰岛素样生长因子2 (IGF2) 在90%的上腺皮癌 (ACC) 中过度表达,通过IGF1R和胰岛素受体异型A (IRA) 促进增殖.
- IGF2在ACC瘤发生中的确切作用以及IGF1R和IRA对ACC细胞生长的贡献仍然不完全理解.
- 这项研究研究了IGF1R和IR表达,局部化和异形使用在ACC和上腺皮层腺瘤 (ACA) 中,以及它们在IGF2驱动的增殖中的作用.
研究的目的:
- 评估IGF1R和IR表达和局部化在ACC和ACA.
- 在ACC和ACA中确定IR异型 (IRA和IRB) 的表达.
- 阐明IGF1R和IR在ACC中介导IGF2驱动的扩散中的作用.
主要方法:
- 在118个ACC和22个ACA样本上进行免疫组织化学测试,以评估IGF1R和IR表达和定位.
- RT-qPCR用于确定瘤组织,细胞系和初级培养中的IRA和IRB表达.
- 在体外实验涉及单双受体沉默和抑制ACC细胞系和初级培养中的试验,以评估增殖.
主要成果:
- 在ACC中更高的IGF1R血局部化与Ki67和Weiss分数的增加相关.
- 在ACC中的IR表达与较高的瘤侵略性标志物有关.
- 胰岛素受体异型A (IRA) 是ACC和ACA中占主导地位的IR异型;沉默IGF1R和IR减少了大多数ACC细胞系和初级培养中的增殖.
结论:
- IGF1R局部化和IR表达是预测ACC攻击性的潜在生物标志物.
- 这些发现表明针对IGF1R-IR向治疗的患者分层的潜力.
- 准IRA异型可能是ACC的新治疗策略.
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