哺乳动物细胞的延迟真空化是由低压和离子损失引起的
Emily Zook1, Yingzhou Edward Pan2, Anna Wipplinger3
1Department of Biological Sciences, Kent State University, Kent, OH, USA.
Scientific reports
|November 26, 2024
概括
低位环境触发细胞真空球的形成,称为LateVacs,在胀减轻后. 这个过程与化物或的损失有关,而不是酸性或自.
科学领域:
- 细胞生物学 细胞生物学
- 生理学 生理学 生理学
- 分子机制的分子机制
背景情况:
- 暴露在低压条件下的哺乳动物细胞会产生来源不明的真空.
- 空腔形成,称为LateVacs,发生在透性胀消失数小时后.
研究的目的:
- 研究LateVacs的性质和形成机制.
- 确定真空球发育的离子触发因素.
主要方法:
- 在低离子和低离子强度条件下的细胞培养.
- 针对 lysosomal (LAMP-1) 和 autophagosomal (LC3) 标记物的免疫光染色.
- 使用LysoTracker和acridine orange进行pH值评估.
- 基因操纵 (LRRC8A淘汰赛,WNK1/WNK3双淘汰赛) 和药理抑制 (巴菲洛米辛A1,WNK抑制剂).
主要成果:
- 拉特瓦克是LAMP-1阳性的,但不表现出酸性pH或依赖V-ATPase.
- 空腔形成需要体积调节离子通道 (VRAC) 的LRRC8A子单元.
- 低化物或低的环境诱导LateVacs的形成.
- 抑制WNK激酶抑制了化物耗尽诱导的真空化.
结论:
- 拉特瓦克斯的形成是由通过VRAC或耗尽的化物耗尽引起的.
- WNK 激酶信号参与了对低化物条件的反应.
- 细胞离子稳态在调节真空生物发生过程中起着至关重要的作用.
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