基于碳量子点的光温度计,具有用于细胞内温度测量的各种检测模式
Yuki S Kato1, Yukiho Shimazaki2,3, Shunsuke Chuma3
1Department of Biological Sciences, School of Science, The University of Osaka, Machikaneyamacho Toyonaka, Osaka 560-0043, Japan.
Nano letters
|March 26, 2025
概括
我们开发了碳量子点 (CQD),用于在活细胞中精确的纳米级温度传感. 这些CQD提供了多功能检测模式,包括光寿命,从而实现精确的细胞温度计.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 生物医学工程 生物医学工程
背景情况:
- 精确的纳米尺度温度测量对于理解细胞过程至关重要.
- 现有的温度计方法在敏感性,侵入性和活细胞内的适用性方面存在局限性.
- 碳量子点 (CQD) 为潜在的生物传感应用提供了独特的光学特性.
研究的目的:
- 为了合成和表征用于纳米级温度计的多功能碳量子点 (CQD).
- 研究使用CQD作为具有多个检测模式的光纳米温度计.
- 为了证明CQDs的应用,在活细胞中进行精确的,最少侵入性的温度测量.
主要方法:
- 使用 antraquinone衍生物和l-cysteine的CQDs的热水合成.
- 修改CQD前体,以实现光强度,比度和光寿命基础的温度计.
- 在体外和体内对CQD细胞毒性,细胞吸收和温度传感能力的评估.
- 在生物化学反应和细胞事件期间测量温度变化.
主要成果:
- 合成的CQD显示了基于光的温度计的多功能检测模式.
- 基于光寿命的CQD在不同的pH值和离子强度中表现出强的性能.
- CQDs表现出低细胞毒性和高细胞吸收,使得无洗成像.
- 使用光寿命实现了精确的单细胞温度测量,通过光强度进行交叉验证.
- 与线粒体脱极化相关的温度变化被成功量化.
结论:
- CQD是活细胞中纳米级温度计的多功能和有效工具.
- 使用CQD的光寿命基温度计提供了可靠和精确的温度测量.
- CQDs为研究细胞热力学提供了一种最少的侵入性方法.
- 这些发现突显了CQD在推进细胞成像和诊断方面的潜力.
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