帕佐帕尼布通过准核因子E2相关因子2 (Nrf2) 来刺激癌细胞的衰老
Xingyuan Wang1, Jing Yang1, Dechao Li1
1Department of Urology, Harbin Medical University Cancer Hospital, Harbin, China.
Journal of biochemical and molecular toxicology
|April 13, 2024
概括
用于细胞癌 (RCC) 的帕佐帕尼布促进癌细胞衰老,并通过激活核因子E2相关因子2 (Nrf2) 来降低端粒酶活性. 沉默Nrf2阻止了这些效应,揭示了Pazopanib的一种新机制.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 由于其高死亡率,细胞癌 (RCC) 提出了重大的临床挑战.
- 帕佐帕尼布是已批准用于RCC的治疗方法,但其确切的作用机制仍然不完全理解.
- 研究新的治疗机制对于改善RCC患者的治疗结果至关重要.
研究的目的:
- 阐明帕佐帕尼布在人类RCC细胞系ACHN.中细胞毒性的潜在机制.
- 研究细胞衰老和核因子E2相关因子2 (Nrf2) 在Pazopanib抗癌作用中的作用.
主要方法:
- 人类RCC ACHN细胞用不同度的Pazopanib进行了治疗.
- 细胞衰老通过与衰老相关的β-galactosidase (SA-β-Gal) 染色进行评估.
- 关键的蛋白质和基因表达 (Nrf2, γH2AX, hTERT, TERF2, p53, PAI) 通过西斑和实时PCR进行了分析.
- 进行了Nrf2敲击,以确定其在Pazopanib作用中的作用.
主要成果:
- 帕佐帕尼布降低了ACHN细胞活力,诱导了氧化应激,并导致DNA损伤 (增加了γH2AX).
- 帕佐帕尼布治疗显著增加了细胞衰老,并降低了端粒酶活性.
- Nrf2激活是关键的,因为Nrf2敲击取消了帕佐帕尼布诱导的衰老和端粒酶抑制.
- 帕佐帕尼布以Nrf2-依赖的方式调节了p53和等离子体激活剂抑制剂 (PAI) 的表达.
结论:
- 帕佐帕尼布通过促进Nrf2-介导的细胞衰老,对RCC细胞产生细胞毒性.
- 这项研究揭示了一种涉及Nrf2在Pazopanib抗癌活性中的新机制.
- 准Nrf2通路可能为RCC治疗提供新的治疗策略.
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