关于三种类型的UPLC-HRMS之间的定性信息的相关性和差异的研究,以及在代谢物注释中的潜在概括
Zhongda Zeng1, Jinfeng Huo1, Yuxi Zhang2
1College of Environmental and Chemical Engineering, Dalian University, Dalian 116622, China.
概括
超高性能液态色谱-高分辨率质谱 (UPLC-HRMS) 的仪器变化使代谢物注释复杂化. 这项研究开发了一个计算策略,在不同的UPLC-HRMS仪器中标准化代谢物识别,提高数据的一致性.
科学领域:
- 分析化学 分析化学
- 代谢学 代谢学 代谢学
- 计算生物学 计算生物学
背景情况:
- 代谢学依赖于超高性能液体色谱学与高分辨率质谱学 (UPLC-HRMS) 结合用于代谢物识别.
- 不同的UPLC-HRMS仪器产生的数据的变化阻碍了代谢物注释的一致性和数据共享.
- 标准化对于可靠的代谢物注释和跨研究的比较至关重要.
研究的目的:
- 在三个常见的UPLC-HRMS仪器中,系统地调查保留时间 (tR),前体离子 (MS1) 和产品碎片离子 (MS2) 的变化.
- 为集成代谢物注释制定计算策略,以考虑仪器特定变化.
- 改进从各种实验条件和制造商获得的定性代谢物信息的概括性.
主要方法:
- 来自三个UPLC-HRMS仪器的tR,MS1和MS2数据的相关性和差异的定量研究.
- 在四个碰撞能量电压下检查MS2变化与技术复制品.
- 开发一个使用特征和非常见片段进行综合注释的评分评估.
- 使用标准化合物和增值血清样本混合物的验证.
主要成果:
- 在不同的UPLC-HRMS仪器之间确定了tR,MS1和MS2的系统和相关变化.
- 证明,拟议的计算策略有效地减少了差异离子在代谢物注释中的影响.
- 展示了该方法在准确注释标准化合物和血清样本中的代谢物中的性能.
结论:
- 开发的计算策略提供了一个可选的方法,以抵消各种UPLC-HRMS仪器中代谢物注释的差异.
- 这种方法有可能提高一般代谢物注释的准确性和一致性,在非目标代谢学.
- 这些发现支持在HRMS基础上的代谢学研究中改进数据共享和标准化.
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