在HPV阳性细胞中,DARPin诱导的p53的重新激活
Philipp Münick1, Alexander Strubel1, Dimitrios-Ilias Balourdas2,3
1Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Frankfurt, Germany.
Nature structural & molecular biology
|January 9, 2025
概括
一种新设计的蛋白质可以阻断人乳头瘤病毒 (HPV) 基蛋白E6和E7,并重新激活瘤抑制剂p53. 这种方法显示了通过稳定p53并恢复其功能来预防HPV驱动的癌症的潜力.
科学领域:
- 在瘤学瘤学.
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 高风险的人类乳头瘤病毒 (HPV) 菌株在全球引起上皮癌.
- 通过破坏细胞控制机制,HPV瘤蛋白E6和E7驱动瘤发生.
- HPV E6蛋白向瘤抑制剂p53,通过与E3结合酶E6AP的相互作用降解.
研究的目的:
- 开发一种针对HPV E6-E6AP相互作用的治疗策略.
- 为了研究一个设计 ankyrin重复蛋白 (DARP) 作为HPV E6的抑制剂.
- 评估DARP在重新激活p53和防止瘤转化方面的潜力.
主要方法:
- 设计用于结合HPV E6蛋白的DARP的特征.
- 评估DARP对E6-E6AP复合体形成的影响.
- 评估HPV阳性癌细胞系 (HeLa和SiHa) 中的p53稳定和转录活性.
主要成果:
- DARP成功地与HPV E6结合到同一个部位,取代了E3结合酶E6AP.
- 这种相互作用导致p53.3的稳定.
- 在HPV18阳性HeLa和HPV16阳性SiHa细胞中,p53依赖的转录被重新激活.
- DARP没有干扰p53DNA结合或MDM2负反循环.
结论:
- 设计的安基林重复蛋白可以有效地抑制HPV E6上蛋白活性.
- 通过DARP重新激活p53提供了针对HPV诱导癌症的潜在治疗策略.
- 这种方法代表了癌症预防和治疗的有希望的途径.
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