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使用质谱成像原位探测癌灶中脂质的脂肪酰链长度和去饱和作用的变化。

In situ probing changes in fatty-acyl chain length and desaturation of lipids in cancerous areas using mass spectrometry imaging.

作者信息

Guo Lei, Lai Zhizhen, Wang Yanmin, Li Zhili

机构信息

Department of Biophysics and Structural Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.

Department of Clinical Laboratory, Heze Municipal Hospital, Heze, China.

出版信息

J Mass Spectrom. 2020 Jul 11;56(4):e4621. doi: 10.1002/jms.4621.

Abstract

Aberrant changes in the expression levels and structure of lipids may shape tumor microenvironment. In this study, we have performed mass spectrometry imaging and profiling analysis of 63 tissues of five types of cancer, namely, breast, colorectal, esophageal, lung, and gastric cancer, using in situ liquid extraction electrosonic spray ionization mass spectrometry imaging. Alteration of fatty-acyl chain length of unsaturated phosphatidylcholines, phosphatidylinositols, and phosphatidylserines and of chain length of (un)saturated fatty acids are associated with different cancerous areas of five types of cancer. The ratios of the same fatty-acyl carbon atom lipids with one double bond difference and the ratios of the same chain-length fatty acids with one double bond difference exhibited significant differences among the cancerous areas of five types of cancer. Our data may reveal that there were different lipid metabolism networks among five types of cancer.

摘要

脂质表达水平和结构的异常变化可能塑造肿瘤微环境。在本研究中,我们使用原位液体萃取电喷雾电离质谱成像技术,对乳腺癌、结直肠癌、食管癌、肺癌和胃癌这五种癌症的63个组织进行了质谱成像和谱图分析。不饱和磷脂酰胆碱、磷脂酰肌醇和磷脂酰丝氨酸的脂肪酰链长度以及(非)饱和脂肪酸的链长度改变与五种癌症的不同癌区相关。具有一个双键差异的相同脂肪酰碳原子脂质的比率以及具有一个双键差异的相同链长脂肪酸的比率在五种癌症的癌区之间表现出显著差异。我们的数据可能揭示了五种癌症之间存在不同的脂质代谢网络。

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