质量分析仪和组织截面厚度对 MALDI-MSI 的空间N-Glycomics 的影响
Dušan Veličković1, Marija Veličković1, Christopher L O'Connor2
1Environmental Molecular Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.
Journal of the American Society for Mass Spectrometry
|February 28, 2025
概括
矩阵辅助激光脱/电离质谱成像 (MALDI-MSI) 空间N-糖因子分析显示,FTICR和timsTOF质谱仪之间的N-糖因子覆盖率相似. 较薄的组织截面 (2微米) 对空间N-糖因子有效.
科学领域:
- 格莱科米克斯 (Glycomics) 是一个有趣的药物.
- 质谱仪成像成像 质谱仪成像
- 生物医学研究生物医学研究
背景情况:
- 使用MALDI-MSI的空间N-glycomics对于理解组织异质性至关重要.
- FFPE人类脏样本用于评估分析性能.
研究的目的:
- 为了比较来自FTICR和timsTOF质谱仪的MALDI-MSI空间N-glycomics数据.
- 评估组织截面厚度对N-甘氨酸覆盖面,敏感性和组织学对齐的影响.
主要方法:
- 对MALDI-MSI空间N-glycomics的FTICR和timsTOF质谱仪的比较.
- 对不同厚度 (2微米和7微米) 的FFPE人类脏组织切片的分析.
- 评估N-糖甘覆盖范围,敏感性和组织学对齐.
主要成果:
- 在FTICR和timsTOF之间,N-glycan覆盖率和可重复性的差异可以忽略不计.
- timsTOF表现出更高的工作周期和更好的横向分辨率,用于更精细的空间映射.
- 在timsTOF分析中,2微米的组织截面保持了灵敏度和信号强度.
结论:
- 在覆盖范围方面,FTICR和timsTOF对于MALDI-MSI空间N-glycomics来说是可比的.
- timsTOF在速度和空间分辨率方面具有优势,可以进行详细的映射.
- 薄组织切片 (2微米) 适用于空间N-糖因子,增强对基因病理学评估的信心.
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