一个低成本,高分辨率的热塑性微流体探头用于生物组织样本的质谱成像
Xiangtang Li1, Hang Hu1, Manxi Yang1
1Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States.
Analytical chemistry
|February 4, 2025
概括
一个新的,低成本的循环烯共聚合物 (COC) 微流体探针使生物样品的高分辨率纳米喷涂脱落电喷离离子质谱成像 (纳米-DESI MSI) 成为可能. 这种负担得起的热塑性探针提高了研究中的分子绘图的可访问性.
科学领域:
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
- 生物医学成像技术 生物医学成像技术
背景情况:
- 纳米喷雾脱电喷雾电离化质谱成像 (纳米-DESI MSI) 提供了无标签的生物样本的分子映射.
- 微流体探头 (MFP) 提高了纳米-DESI MSI的强度和吞吐量,但玻璃制造成本高,塑料替代品有局限性.
- 现有的微流体探测材料限制了纳米-DESI MSI中的空间分辨率和溶剂兼容性.
研究的目的:
- 开发一种低成本,高性能的微流体探针用于纳米-DESI MSI.
- 克服现有的玻璃和塑料微流体探针的局限性.
- 为了提高高空间分辨率纳米-DESI MSI的可访问性.
主要方法:
- 使用循环烯共聚合物 (COC) 制造微流体探针,通过线印和热粘合.
- 探测器空间分辨率和溶剂兼容性的表征.
- 通过使用纳米-DESI MSI对一个大型人类脏组织部位进行成像来证明探针的性能.
主要成果:
- 一个新的,低成本的COC微流体探头在标准实验室环境中成功制造出来.
- 对于纳米-DESI MSI,COC-MFP表现出高度的灵敏度和稳定性.
- 估计空间分辨率达到了5-7μm,适用于详细的分子成像.
结论:
- 开发的COC微流体探测器为高空间分辨率纳米-DESI MSI提供了负担得起和有效的替代方案.
- 这一创新使得先进的分子成像技术对科学界更容易获得.
- COC-MFP扩大了纳米-DESI MSI在生物和医学研究中的应用范围.
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