胰岛素耐药性通过脂肪细胞衍生的外体增加TNBC的攻击性和大脑转移
Yuhan Qiu1, Andrew Chen2, Rebecca Yu2
1Boston University, United States.
Molecular cancer research : MCR
|March 6, 2025
概括
乳腺脂肪细胞中的胰岛素抵抗通过外体促进三阴性乳腺癌 (TNBC) 转移. 这些发现表明,代谢干预可以改善TNBC和2型糖尿病 (T2D) 患者的结果.
科学领域:
- 在瘤学瘤学.
- 代谢性疾病研究研究
- 细胞生物学 细胞生物学
背景情况:
- 患有2型糖尿病 (T2D) 的三阴性乳腺癌 (TNBC) 患者面临转移率增加和生存率降低.
- 瘤微环境 (TME) 中的脂肪细胞至关重要,但它们在TNBC中的代谢作用尚未得到充分研究.
- 连接T2D与TNBC进展的机制仍然不太清楚.
研究的目的:
- 调查胰岛素抵抗性 (IR) 脂肪细胞的外体是否促进TNBC中的上皮细胞转移到介质细胞 (EMT) 和转移.
- 探索脂肪细胞衍生出异体miRNAs在T2D相关的TNBC进展中的作用.
主要方法:
- 从胰岛素敏感 (IS) 和胰岛素耐药 (IR) 3T3-L1成熟脂肪细胞中纯化的外体.
- 在试验室中用外体细胞对待的小鼠4T1 TNBC细胞.
- 在体内分析了EMT标志物,增殖,血管新生和大脑转移.
主要成果:
- 与IS外体相比,IR脂肪细胞外体显著增加了TNBC细胞中的EMT,增殖和血管生成.
- 在IR组中,大脑转移表现出中细胞形态和EMT标记的增加.
- 确定了MiR-145a-3p作为IS和IR外体之间差异表达的miRNA,可能调节转移.
结论:
- 来自IR脂肪细胞的外体可以增强EMT并促进TNBC中的大脑转移,可能通过miRNA途径.
- 二型糖尿病可能会产生转移性TME,这凸显了对同时患病的患者进行监测和代谢干预的需要.
- 准脂肪细胞外体功能为T2D的TNBC提供了潜在的治疗策略.
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