Association of 276G>T adiponectin gene polymorphism to plasma adiponectin and albuminuria in type 2 diabetic patients.
OBJECTIVE
The 276G>T polymorphism of the adiponectin (ADIPOQ) gene has been correlated with plasma adiponectin, type 2 diabetes (T2D) and its complications. Studies of the role of 276G>T polymorphism in the prevalence of T2D kidney disease are few and contradictory; ethnic differences might play a role. We aimed to assess the relationship of this polymorphism with albuminuria in a cohort of Caucasian T2D patients.


METHODS
Consecutive T2D outclinic patients were screened and included upon informed consent; exclusion criteria were glomerular filtration rate (GFR)<30 ml/min, acute intercurrent illness and urinary tract infection. History, standard laboratory evaluation, total plasma adiponectin and genotyping for the 276 ADIPOQ locus were obtained.


RESULTS
One hundred and three T2D patients were included. Forty-three (41.7%) of them had GG genotype, 50 (48.5%) had GT and 10 (9.7%) had TT genotype. Plasma adiponectin was significantly higher in TT-allele carriers (19.03±3.46 μg/ml) than in GT (10.14±1.78 μg/ml) and GG carriers (8.71±1.60 μg/ml), P=0.003. Adiponectin was higher in albuminuric (13.97±2.07 μg/ml) than in normoalbuminuric patients (6.91±0.88 μg/ml), P=0.004. The prevalence of T allele was higher in normoalbuminuric patients [36 (69.2%) GT+TT carriers] than in albuminuric ones [24 (47.1%)], P=0.02. Logistic regression identified the following as predictors of albuminuria: GG genotype: P=0.003 (OR 4.2; CI 1.61-10.96); low GFR: P=0.003 (OR 0.97; CI 0.95-0.99); and high plasma adiponectin: P=0.012 (OR 1.07; CI 1.01-1.14).


CONCLUSIONS
Our data suggest that 276G>T polymorphism of the ADIPOQ gene is associated with plasma adiponectin levels. By influencing adiponectinemia, 276G>T polymorphism might predict the presence of albuminuria in Caucasian T2D patients.
Department of Nephrology, University of Medicine and Pharmacy Iuliu Hatieganu Cluj Napoca, 8 Victor Babes street, 400012, Cluj Napoca, Romania.
Ina Maria
IM
Kacso
Adrian Pavel
AP
Trifa
Radu Anghel
RA
Popp
Gabriel
G
Kacso
D052242:Adiponectin / Q000097:blood* / Q000235:genetics; D000419:Albuminuria / Q000097:blood* / Q000150:complications / Q000235:genetics*; D003924:Diabetes Mellitus, Type 2 / Q000097:blood* / Q000150:complications / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic
C499918:ADIPOQ protein, human; D052242:Adiponectin