由THz辐射诱导的细胞膜的秩序-混乱相位过渡
1Center for Advanced Photonics, RIKEN, Sendai, Japan. hoshina@riken.jp.
Scientific reports
|April 29, 2025
概括
太赫兹 (THz) 辐射通过增加脂质扩散来非热增强细胞膜流动性. 这种THz波效应影响细胞膜动态,并对THz安全标准和细胞操纵产生影响.
科学领域:
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
- 太赫兹科学 太赫兹科学
背景情况:
- 太赫兹 (THz) 辐射越来越多地研究其生物效应.
- 了解THz辐射对活细胞的非热机制对于安全性和应用至关重要.
- 细胞膜动力学在细胞功能中起着至关重要的作用.
研究的目的:
- 研究THz辐射对HeLa细胞膜中脂质分子侧向扩散的非热效应.
- 阐明THz波影响细胞膜流动性和动态的机制.
- 探索对THz辐射安全和细胞操纵技术的潜在影响.
主要方法:
- 利用光漂白后的特拉赫兹光恢复 (THz-FRAP) 来测量HeLa细胞中的脂质扩散常数.
- 采用0.10,0.29和0.48 THz的THz波辐射,具有不同的功率密度.
- 使用超薄热电偶进行温度校准,以隔离非热效应.
- 进行Laurdan光成像,观察细胞膜动态的变化.
主要成果:
- 在0.10和0.29THz的THz辐射显著增加了在亚生理温度下脂质横向扩散常数.
- 这些发现表明,由于THz波暴露,细胞膜流动性得到增强.
- 劳伦的光成像揭示了THz诱导的红色转移,这表明细胞膜脂质中的秩序-混乱相位过渡受绑定水分子动力学影响.
结论:
- 太赫兹辐射对细胞膜表现出非热效应,主要是通过增加流动性.
- 观察到的效应与结合的水分子动态的改变有关,导致脂质相转换.
- 结果为制定THz辐射安全指南和开发新型细胞操纵技术提供了关键的见解.
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