2型糖尿病伴非酒精性脂肪肝患者胰岛素抵抗与血清ω-3多不饱和脂肪酸的关系

目的 研究2型糖尿病伴非酒精性脂肪肝(NAFLD)患者胰岛素抵抗与ω-3多不饱和脂肪酸(ω-3PUFA)的关系.方法 2型糖尿病伴NAFLD患者51例、单纯2型糖尿病患者50例、单纯NAFLD患者45例、健康对照组42例为研究对象.用高效气相色谱法测定所有研究对象的血清ω-3PUFA,HOMA胰岛素抵抗指数(HOMA-IR)评价胰岛素抵抗,同时检测所有对象的ALT、AST、γ-谷氨酰转移酶(GGT)、TC、TG、LDL-C、HDL-C等指标.结果 2型糖尿病伴NAFLD组的HOMA-IR(4.90±2.54)高于单纯2型糖尿病组(2.38±1.23)、单纯NAFLD组(2.20±1.15)及对照组(1.13±0.42),P值均<0.05;2型糖尿病伴NAFLD组的ALT、AST、GGT、TC、TG和LDL-C高于单纯2型糖尿病组、单纯NAFLD组、对照组(P值均<0.05);2型糖尿病伴NAFLD组的ω-3PUFA总量[(5.68±2.02)%]显著低于单纯2型糖尿病组[(7.17±2.38)%]、单纯NAFLD组[(6.97±2.32)%]及对照组[(10.08±2.76)%],P值均<0.05;相关性分析显示,ω-3PUFA与HOMA-IR及TC、TG、LDL-C均呈负相关(r值分别为-0.491及-0.376、-0.462、-0.408,P值均<0.05).结论 2型糖尿病伴NAFLD患者血清ω-3PUFA总量显著下降,与胰岛素抵抗呈负相关,可能在疾病的发生发展中具有重要作用.

Serum omega-3 polyunsaturated fatty acid and insulin resistance in type 2 diabetes mellitus and non-alcoholic fatty liver disease

Objective To investigate the relationship between serum omega-3 polyunsaturated fatty acid (ω-3PUFA) and insulin resistance(IR) in patients with type 2 diabetes mellitus and non-alcoholic fatty liver disease (NAFLD). Methods This trial involved 51 patients of type 2 diabetes mellitus with NAFLD (G4 group), 50 patients of type 2 diabetes alone(G3 group), 45 patients of NAFLD alone (G2 group) and 42 healthy control subjects (G1 group). Serum ω-3PUFA profile was analyzed with capillary gas chromatography. Insulin resistance was assessed by homeostasis model assessment (HOMA-IR). ALT, AST, γ-glutamyltransferase(GGT) and serum lipids were measured. Results The levels of HOMA-IR were higher in G4 group than those in G3, G2 and G1 group(4. 90 ± 2. 54 vs 2. 38 ± 1.23, 2. 20 ± 1.15, 1.13± 0.42;P<0.05). The level of ALT, AST, GGT, TC, TG, LDL-C were higher in G4 group than those in G3, G2 and G1 group(P < 0. 05). The level of ω-3PUFA was signifieantly lower in G4 group than those in G3, G2 and G1 group(5.68 ±2.02 vs 7. 17 ±2. 38, 6.97±2.32, 10.08±2.76;P <0.05). ω-3PUFA cocentration was negatively correlated with HOMA-IR, TC, TG and LDL-C (r = -0.491, -0. 376, - 0. 462, - 0. 408, P < 0. 05). Conclusions Serum ω-3 PUFA is significantly decreased in patients with type 2 diabetes mellitus and NAFLD. Serum ω-3PUFA is negatively correlated with insulin resistance. ω-3PUEA plays a very important role in the development of diabetes mellitus and NAFLD.