缺氧对Caco-2细胞中P-gp的表达和功能的影响
Anpeng Zhao1,2, Hongfang Mu3, Wanteng Yao3,4
1Department of Pharmacy, 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou 730050. z_anpeng@163.com.
概括
缺氧显著降低了Caco-2细胞中的P-glycoprotein (P-gp) 表达和功能,影响了药物运输. 这项研究揭示了缺氧.
科学领域:
- 细胞生物学 细胞生物学
- 药理学 药理学是指药理学的学科.
- 生理学 生理学 生理学
背景情况:
- 低氧是一种低氧的状况,可以影响各种药物的口服生物可用性.
- P-glycoprotein (P-gp) 在肠道药物排放中起着至关重要的作用,其功能可能会因缺氧条件而改变.
- 卡科-2单层模型是一种标准的体外系统,用于研究肠上皮质P-gp功能.
研究的目的:
- 研究缺氧对Caco-2细胞中P-gp的表达和功能的影响.
- 在高海拔低氧环境下,了解肠道上皮细胞中药物转运变化的基础机制.
主要方法:
- 卡科-2细胞在不同时间 (24,48,72小时) 暴露于低氧条件 (1%的氧气).
- 使用西式斑点测试来评估P-gp水平.
- 建立了一个Caco-2单层模型,并将其暴露在72小时的正常氧或缺氧中,以通过罗达胺123流量评估P-gp功能并评估单层完整性.
主要成果:
- 缺氧显著降低了Caco-2细胞中的P-gp表达,特别是在72小时暴露后 (P<0.01).
- 在低氧条件下,Caco-2单层模型的完整性和两极化得到维持.
- 低氧导致P-gp基质罗达胺123的排泄率显著降低,表明P-gp功能受损 (P<0.01).
结论:
- 缺氧抑制了Caco-2细胞中的P-gp功能.
- 观察到的P-gp功能的抑制可能与低氧条件下的P-gp表达水平下降有关.
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