宽带碰撞诱导解离质谱成像 宽带碰撞诱导解离 质谱成像
Sumi Krupa1, Wiktoria Szuberla2, Joanna Nizioł3
1Doctoral School at the Rzeszów University of Technology, 8 Powstańców Warszawy Ave., Rzeszów 35-959, Poland.
Journal of the American Society for Mass Spectrometry
|June 19, 2025
概括
这项研究引入了宽带碰撞诱导解离 (bbCID) 与质谱成像 (MSI) 结合,用于在人体组织中识别非向代谢物. 这种新的方法揭示了膀和癌中不同的代谢概况,突出了潜在的生物标志物.
科学领域:
- 代谢学 代谢学 代谢学
- 质谱仪成像成像 质谱仪成像
- 癌症生物学 癌症生物学
背景情况:
- 在复杂的生物组织中准确的代谢物识别对于了解疾病机制至关重要.
- 现有的质谱成像 (MSI) 技术在全面的代谢物分析中面临着挑战.
研究的目的:
- 应用宽带碰撞诱导解离 (bbCID) 与质谱成像 (MSI) 用于在人体组织中进行非目标代谢物识别.
- 为了研究代谢物在癌症组织中的空间分布.
主要方法:
- 将bbCID与激光除-远程大气压光电离/化学电离 (LARAPPI/CI) 进行集成,以同时获取前体和碎片离子.
- 使用参考化合物的验证来评估性能.
- 适用于人类膀和癌的临床样本.
主要成果:
- 在膀癌的瘤与非瘤区域中确定了不同的代谢物概况,在瘤中增加脂肪酸 (例如,FA(22:6),FA(22:5),FA(16:0) 和正常组织中的proline.
- 与健康区域相比,在细胞癌组织中观察到高水平的多不和脂肪酸 (例如,阿拉基酸,上腺酸),这些细胞在细胞癌组织中显示出肌酸和血清蛋白的丰富.
结论:
- bbCID-MSI是一种强大的工具,用于在人体组织中进行空间分辨的代谢物分析.
- 该方法可以揭示与癌症相关的生物学相关的代谢变化,有助于生物标志物的发现.
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