Résumé
<p><b>OBJECTIVE</b>To evaluate the role of methylenetetrahydrofolate reductase (MTHFR) gene polymorphisms and plasma homocysteine levels in Chinese patients with type 2 diabetes mellitus and diabetic retinopathy (DR).</p><p><b>METHODS</b>MTHFR genetic C677T polymorphisms were determined by PCR-restriction fragment length polymorphism. Total plasma homocysteine levels were measured using high-performance liquid chromatography (HPLC) with fluorescence detection.</p><p><b>RESULTS</b>The frequencies of MTHFR T homogenetic type and CT heterogenetic type and allele T (28.18%, 41.82%, 49.09%) in type 2 diabetic patients with diabetic retinopathy were significantly higher than those in diabetic patients without retinopathy (18.37%,29.59%,33.16%) or the normal controls (17.54%, 28.07%, 31.58%). Howerver, there were no significant differences in the frequency of MTHFR genotype and allele between the type 2 diabetic patients without retinopathy and the normal controls. The presence of T allele appeared to have a strong association with the development of diabetic retinopathy. The odds ratio was 1.94 and the 95% confidence interval was 1.31-2.88. Moreover, the plasma homocysteine levels in patients with TT or CT genotype were markedly higher than those in patients with CC genotype.</p><p><b>CONCLUSION</b>MTHFR gene C677T mutation associated with a predisposition to increase of plasma homocysteine may represent a genetic risk factor for diabetic retinopathy in Chinese type 2 diabetes mellitus.</p>
Sujets)
Adulte , Femelle , Humains , Mâle , Adulte d'âge moyen , Allèles , ADN , Génétique , Métabolisme , Type II site-specific deoxyribonuclease , Métabolisme , Diabète de type 2 , Sang , Génétique , Rétinopathie diabétique , Sang , Génétique , Fréquence d'allèle , Génotype , Homocystéine , Sang , Methylenetetrahydrofolate reductase (NADPH2) , Oxidoreductases acting on CH-NH group donors , Génétique , Mutation ponctuelle , Polymorphisme génétiqueRésumé
Objective To establish the diagnosis criterion and management protocol for nonalcoholic steatohepatitis(NASH).Methods The data of 75 patients with NASH including 10 chronic hepatitis,10 simple fatty,15 alcoholic liver disease,10 healthy conerol and 40 tpye 2 diabetic patient without viral hepatitis were investigated.Results Among 75 NASH patients,the mean age was 36.8 years,and male were 66(88%);their body mass index(BMI)≥25 were 58 (77.3%).Serum ALT and insulin concentration were elevated in all patients with NASH;60 cases were with hypertriceridemia (80%),30 with normal oral glucose tolerate test (OGTT) (40%),fatty liver was detected in 67 patients (90%)by ultrasonography.The BMI were different between NASH and healthy controls,P