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Intrahepatic cholangiocarcinoma (ICC) is the most common malignant bile duct tumor in the liver and the second most common primary liver cancer with increasing morbidity and poor prognosis. Metabolic aberration plays key roles in cancer progression. As a key metabolic intermediate, acetyl-CoA accumulation shows close association with cancer metastasis. However, the role of acetyl-CoA metabolic aberration in ICC is still undetermined. Here, by investigating tissue samples from ICC patients and ICC cell lines, we found that acyl-CoA thioesterase 12 (ACOT12) expression is significantly down-regulated in ICC tissues, and is associated with poor prognosis of ICC. In vitro and in vivo studies demonstrated that ACOT12 suppressed ICC cells metastasis. Further mechanistic studies revealed that down-regulation of ACOT12 promoted ICC metastasis by inducing Slug expression and epithelial-mesenchymal transition (EMT). Our findings link ACOT12-regulated-acetyl-coA metabolic aberration with ICC metastasis and imply that ACOT12 could be a prognostic marker and a potential therapeutic target for ICC metastasis.

ACOT12-mediated acetyl-CoA hydrolysis suppresses intrahepatic cholangiocarcinoma metastasis by inhibiting epithelial-mesenchymal transition