来自癌症相关纤维细胞的血栓素-4降低了胃癌细胞中ERBB2的表达
Gen Tsujio1,2,3, Masakazu Yashiro1,2,3, Takashi Sakuma1,2,3
1Department of Gastroenterological Surgery, Osaka Metropolitan University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka 545-8585, Japan.
Carcinogenesis
|October 7, 2025
概括
与癌症相关的纤维细胞 (CAF) 和血栓松丁-4 (THBS4) 降低了胃癌 (GC) 中的HER2表达,导致抗HER2治疗耐药性. 像 gabapentin 这样的 THBS4 抑制剂可以克服这种抵抗.
科学领域:
- 在瘤学瘤学.
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 在HER2表达的瘤内异质性与在HER2阳性胃癌 (GC) 中对抗HER2疗法的耐药性相关.
- 血栓素-4 (THBS4) 在GC微环境中的癌症相关纤维细胞 (CAF) 中过度表达,并与GC重塑有关.
研究的目的:
- 调查CAFs与GC中的瘤内HER2异质性之间的关系.
- 为了确定CAFs对GC细胞中HER2表达的影响.
主要方法:
- 利用了两个HER2阳性GC细胞系 (NCI-N87,OE19) 和胃CAF.
- 通过免疫组织化学和RT-PCR分析了纤维细胞对癌细胞HER2表达的影响.
- 采用THBS4 siRNA进行淘汰试验,并检查了Herceptin/gabapentin在体内的影响.
主要成果:
- CAFs和复合THBS4显著降低了GC细胞中的HER2 (ERBB2) 表达.
- THBS4 siRNA 和 gabapentin 抑制了 CAFs 的 HER2 降低活性.
- 在体内,CAF抑制了GC瘤的HER2表达,诱导了Herceptin耐药性,而 gabapentin克服了这种耐药性.
结论:
- 由CAFs分泌的THBS4降低了GC细胞中的HER2 (ERBB2) 表达.
- THBS4受体抑制剂,如 gabapentin,显示在预防抗HER2疗法耐药性的潜力.
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