在抗西斯的卵巢癌细胞中释放的化疗小细胞外囊是由 lysosomal 功能调节的
Cristóbal Cerda-Troncoso1,2,3, Felipe Grünenwald2, Eloísa Arias-Muñoz1
1Organelle Phagy Lab, CEBICEM Facultad de Medicina y Ciencia Universidad San Sebastián Santiago Chile.
Journal of extracellular biology
|July 1, 2024
概括
耐化学反应的卵巢癌细胞通过改变内体贩运,分泌出传递抗性的细胞外囊泡. 针对这种途径,特别是RAB27A,可以恢复敏感性和溶酶体功能,提供一种新的治疗策略.
科学领域:
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
- 细胞外囊泡 细胞外囊泡
背景情况:
- 抗化学反应是卵巢癌 (OvCa) 治疗的一个主要挑战.
- 抗化疗的OvCa细胞分泌出小的细胞外囊泡 (化疗-sEVs),转移抗性.
- 参与sEV形成的多胞体内体 (MVEs) 的贩运,在OvCa化学抵抗中被了解得很少.
研究的目的:
- 调查MVE贩运途径与对西斯抗性OvCa.Ca中的sEV分泌之间的关系.
- 探索RAB GTPases的作用,特别是RAB27A和RAB7,在中小企业的贩运和化学抵抗中.
- 确定潜在的治疗策略,以中小企业为目标,以克服化学抵抗.
主要方法:
- 在对西斯普拉丁敏感和耐药的OvCa细胞中,MVE,ILV,ESCRT,RAB27A和RAB7水平的比较.
- 评估化学sEVs的分泌及其对抗化学药物的影响.
- 制RAB27A和用拉巴素治疗,以调节MVE的流通和溶酶体功能.
主要成果:
- 抗西斯普拉丁的OvCa细胞显示MVE/ILV,ESCRT和RAB27A的增加,RAB7的减少和溶解体功能受损.
- 通过CDDP治疗,增加了富含DNA损伤反应蛋白的化疗-sEVs分泌.
- RAB27A沉默阻止了化疗-sEVs的分泌,降低了化学抵抗,并恢复了 lysosomal 功能和 RAB7 水平.
- 拉巴胺治疗增强了溶酶体功能,并减少了化疗-sEVs的分泌.
结论:
- 改变的MVE贩运,特别是RAB27A介导的分泌量增加和RAB7介导的溶酶体降解受损,有助于OvCa化学抵抗.
- 针对分泌和溶酶体MVE通路之间的平衡,例如通过调节RAB27A或增强溶酶体功能,是一种有前途的策略.
- 这种方法可能会在卵巢癌中克服西斯的化学抵抗.
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