Παρασκευή 27 Ιανουαρίου 2017

A single non-synonymous variation in type 2 diabetic patients with hepatocellular carcinoma impairs the function of NCOA5 in cell cycle regulation

Type 2 Diabetes (T2D) is a risk factor for hepatocellular carcinoma (HCC). We have previously described that haploinsufficiency of nuclear receptor coactivator 5 (NCOA5) is a genetic defect linking glucose intolerance to HCC. Here we report identification and characterization of a single nucleotide variation (T445A) in NCOA5, causing an amino acid Thr to Ala substitution, in adjacent non-tumorous liver tissues derived from patients with concurrent HCC and T2D. By using Tet-On inducible expression cells, we show that ectopic expression of NCOA5wt suppressed proliferation of HCC cells via induction of G2/M arrest, while ectopic expression of NCOA5T445A had a significantly lesser effect compared to ectopic expression of NCOA5wt.

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