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Background  Free fatty acids (FFAs) play importance roles in the development of diabetes and cardiovascular diseases. We measured serum FFA levels from type 2 diabetes mellitus (T2DM) and acute myocardial infarction (AMI) patients and assay the correlation between serum FFA levels and related factors. The present study was undertaken to investigate a possible relation between the changes in serum free fatty acid concentration with acute myocardial infarction and type 2 diabetes mellitus.    Methods  The study population consisted of 540 healthy individuals and 103 patients with T2DM, 59 patients with AMI and 21 volunteers. Serum FFAs were measured with high pressure liquid chromatography. Blood urea nitrogen and uric acid were measured in clinical laboratory, as were glycemic, lipid and blood routine parameters. We selected 242 individuals with age over 60 years, 143 healthy individuals and 52 patients with T2DM, 47 patients with AMI were incorporated into three groups as control group, T2DM group and AMI group. Associations were analyzed with stepwise regression analysis with adjusted for age, sex, body mass index.    Results  Serum FFA levels were significantly higher in the age over 60 years individuals compared to 20 ~ 50 years (logFFA μmmol/L:2.60 ± 0.16 vs. 2.73 ± 0.18, P < .001) in the healthy group. We found lower FFA levels in the AMI compared to the T2DM and control group (2.64 ± 0.22 vs. 2.72 ± 0.13&2.72 ± 0.16, respectively, P < .05&P < 0.01) in the age over 60, fasting blood glucose level higher in the AMI and T2DM (5.78 ± 1.32&7.75 ± 2.93 mmol/L vs. 4.90 ± 0.47 mmol/L, P < .01&P < .001) compared with the normal group, HDL level (1.01 ± 0.22&0.98 ± 0.18 mmol/L vs.1.30 ± 0.22 mmol/L, P < .001&P < .001). With stepwise regression analysis, the serum FFA levels was positively associated with the HDL in the control group (Y logFFA  = 2.32 + 0.33X HDL , R = 0.26, P < .01) and T2MD (Y logFFA  = 2.46 + 0.27X HDL , R = 0.36, P < .05), AST in AMI (Y logFFA  =2.24 + 0. 015X AST , R = 0.49, P < .01).    Conclusions  Compared to control group, serum FFA levels were decreased only in AMI group, while HDL level was increased in both AMI and T2DM group. The serum FFA levels were positive association with the HDL level in both T2DM and control group, FFA levels were positive association with AST in AMI.

bmc cardiovascular disorders

Association between serum free fatty acid levels and possible related factors in patients with type 2 diabetes mellitus and acute myocardial infarction