通过IR-MALDESI定量MSI在全身斑马鱼中展示Voxel-by-Voxel (V × V) 单点校准
Alena N Joignant1, Stephen J Vega1, David C Muddiman1
1Biological Imaging Laboratory for Disease and Exposure Research, Department of Chemistry, North Carolina State University, Raleigh, North Carolina, USA.
Journal of mass spectrometry : JMS
|January 12, 2026
概括
一种新的voxel-by-voxel (V×V) 校准方法改善了使用定量质谱图像 (qMSI) 在复杂的全身斑马鱼样本中对基酸 (AA) 的量化. 这种方法在异质组织中提供了更准确的脂质测量.
科学领域:
- 利皮多米克 (Lipidomics) 是一种消化剂.
- 质谱仪成像成像 质谱仪成像
- 斑马鱼研究研究 斑马鱼研究
背景情况:
- 全身斑马鱼在定量质谱成像 (qMSI) 方面存在分析挑战,原因是样品的复杂性和制备限制.
- 精确量化脂质,如阿拉基酸 (AA) 对于理解斑马鱼的生物过程至关重要.
- 现有的qMSI方法与异质样本作斗争,影响脂质量定量的准确性.
研究的目的:
- 为了比较不同的定量质谱成像 (qMSI) 方法,在全身斑马鱼中绝对量化阿拉基酸 (AA).
- 开发和验证一个改进的qMSI工作流程,以在结构异质的生物样本中进行准确的脂质分析.
- 为了评估复杂组织的qMSI的voxel-by-voxel (V×V) 校准的实用性.
主要方法:
- 量化质谱成像 (qMSI) 使用红外矩阵辅助激光消耗电喷射电离 (IR-MALDESI).
- 标准规范化方法与一种新的voxel-by-voxel (V×V) 校准方法的比较.
- 使用稳定同位素标记 (SIL) 化AA用于校准曲线构造.
主要成果:
- 标准规范化方法产生了AA度明显低于报告的文献值.
- 声素对声素 (V×V) 校准方法导致AA度与文献值一致.
- V×V方法证明了更简单的样本制备和更准确的量化AA在全身斑马鱼.
结论:
- 声素对声素 (V×V) 校准方法显著提高了使用qMSI在全身斑马鱼中测量阿拉基酸 (AA) 的准确性.
- 这种V×V方法简化了样本准备,并提高了高度异质组织中的脂质量定量.
- 单点V×V校准显示了复杂生物样本的常规qMSI分析的潜力.
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