干扰P2Y2信号促进乳腺瘤细胞传播通过减少ATP依赖的升高和细胞结合点的动素定位促进乳腺瘤细胞传播
Makenzy L Mull1, Stephen J P Pratt2, Keyata N Thompson3,4
1Graduate Program in Molecular Medicine, University of Maryland School of Medicine, 800 W. Baltimore St., Baltimore, MD 21201, USA.
International journal of molecular sciences
|May 14, 2025
概括
乳腺癌细胞对腺三酸盐 (ATP) 的反应发生变化. 转移细胞逃避ATP激活的P2Y2受体信号,影响 (Ca2+) 水平和细胞行为,与非瘤细胞不同.
科学领域:
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
- 生物化学 生物化学
背景情况:
- 高度的腺三酸盐 (ATP) 在瘤微环境和愈合的伤口中被发现.
- 由ATP激活的P2Y2受体,在各种细胞类型中介导信号传递.
- 乳腺上皮细胞中依赖ATP的信号传递及其在转移性乳腺癌中的改变尚未完全理解.
研究的目的:
- 研究乳腺上皮细胞中依赖ATP的P2Y2受体信号传递.
- 为了确定这种信号通路在转移性乳腺癌中是如何改变的.
- 阐明细胞内 (Ca2+) 和行为动态在这个过程中的作用.
主要方法:
- 利用快速成像技术观察细胞内Ca2+变化.
- 采用法洛伊丁染色来评估actin聚合.
- 使用P2Y2抗剂来阻断受体活性.
- 分析了从球体的细胞扩散.
主要成果:
- 与转移性细胞相比,非瘤源的乳腺上皮细胞在ATP刺激时,细胞内Ca2+的增加是转移性细胞的3倍.
- 在非瘤细胞中,ATP激活的P2Y2信号诱导了细胞边缘的actin聚合,但在转移性细胞中并非如此.
- 在非瘤细胞中的P2Y2对抗作用减少了Ca2+的流入,阻止了actin调动,并增加了细胞扩散.
- 在转移细胞中减少P2Y2表达与患者存活率较差相关.
结论:
- 转移性乳腺癌细胞对ATP激活的P2Y2信号产生了模糊的反应,其特征是Ca2+流入和活性激素调动受损.
- 这种逃避细胞反应可能与转移细胞中P2Y2受体表达减少有关.
- 这些发现突显了P2Y2介导信号在调节乳腺上皮细胞行为中的作用,并表明其作为治疗点的潜力.
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