Differential expression of Acyl-CoA:cholesterol acyltransferase 1(ACAT1)in osteoarthritis and its genetic correlation analysis
Objective To investigate the differential expression of Acyl-CoA:cholesterol acyltransferase 1(ACAT1)in osteoarthritis(OA)and its genetic correlation.Methods The expression of ACAT1 in synovial tissues of OA patients and OA mice was analyzed by using GEO database.The OA model was verified by haematoxylin-eosin(H-E)staining.The expression of ACAT1 was detected by RT-PCR.The highly synergistic genes of ACAT1 were analyzed by genome-wide genetic correlation analysis.Results The expression of ACAT1 was down-regulated in synovial tissues of OA patients and OA mice.The changes of ACAT1 expression in cartilage tissues of different strains of BXD and BXH RI mice showed a linear trend,indicating that the expression of ACAT1 gene presented with a typical quantitative genetic trait and was regulated by multiple factors.About 500 genes were highly correlated with ACAT1(P<0.05),including genes related to cell membrane structure,cell-to-cell connectivity and signaling pathways,gene transcription regulation,and protein stability.Conclusion ACAT1 may be a new target for the treatment of OA.