传输的发展 环境压力 激光消化 电离/后光电离 质谱 成像 环境压力 激光消化 电离/后光电离 质谱 成像
Keke Qi1,2, Yongmei Lv3, Ying Xiong4
1National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China.
Analytical chemistry
|March 25, 2024
概括
一种新的方法,传输大气压激光脱吸电离结合后光电离 (t-AP-LDI/PI),提高生物分子检测灵敏度和组织成像的空间分辨率. 这项技术揭示了小脑,海马和黑色素瘤组织中的代谢细节.
科学领域:
- 生命科学 生命科学
- 分析化学 分析化学
- 生物技术是生物技术.
背景情况:
- 基于激光的高分辨率质谱成像 (MSI) 对生命科学研究具有价值.
- 一个关键的限制是激光脱离/消去过程中的低离子产量,阻碍了灵敏度.
- 环境条件MSI需要改进离子生成和检测的方法.
研究的目的:
- 开发一种新的传输大气压激光脱吸电离与后光电离 (t-AP-LDI/PI) 组件的组件.
- 提高生物组织中非向生物分子成像的灵敏度和空间分辨率.
- 为了证明t-AP-LDI/PI MSI在分析复杂的生物样本和疾病状态中的实用性.
主要方法:
- 开发一个t-AP-LDI/PI组件,使用离子放电灯进行后光电离.
- 应用t-AP-LDI/PI系统用于小脑,海马和黑色素瘤组织的非向质谱成像.
- 优化参数以实现高空间分辨率和提高分析器的灵敏度.
主要成果:
- 与单个激光切除相比,t-AP-LDI/PI方法显著增加了1-3个数量级的离子产量.
- 在小鼠大脑中获得了脂质,脂肪酸,神经递质和氨基酸的详细空间分布.
- 在小鼠海马体中对代谢物成像实现了4μm的空间分辨率.
- 发现了黑色素瘤组织内的代谢异质性,与瘤细胞的增殖和入侵有关.
结论:
- 开发的t-AP-LDI/PI技术为环境质谱成像提供了显著提高的灵敏度和空间分辨率.
- 这种方法使各种组织类型中各种生物分子的全面无针对性分析成为可能.
- t-AP-LDI/PI MSI为组织代谢和疾病微环境提供了宝贵的见解,特别是在癌症研究中.
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