Lipid analysis of hepatocellular carcinoma using imaging mass spectrometry

点击翻译按钮获取中文摘要

Molecular lipidomic screening was performed by imaging mass spectrometry (IMS) in 37 resected HCC specimens. IMS revealed the increase of PC phosphatidylcholine (PC) species with palmitoleic acid or oleic acid at the sn-2-position and the reduction of lysophosphatidylcholine (LPC) with palmitic acid at the sn-1-position in HCC tissues.Next, we analyzed mRNA and protein of lysophosphatidylcholine acyltransferase (LPCAT1) which catalyzed LPC into PC and had substrate specificity for some kind of fatty acids.LPCAT1 was more abundant in HCCs than in surrounding parenchyma. We examined the effect of LPCAT1 overexpression or knockdown LPCAT1 on cell proliferation, migration, and invasion in HCC cell lines. LPCAT1 overexpression enriched PCs observed in IMS and promoted cell proliferation, migration, and invasion. LPCAT1 knockdown did vice versa.