Codon 54 polymorphism of the fatty acid binding protein gene and insulin resistance in the Japanese population.
OBJECTIVE
To determine the relationship of the polymorphism at codon 54 of the intestinal fatty acid binding protein gene (FABP2) with insulin resistance and susceptibility to Type 2 diabetes mellitus (DM) in the Japanese population.


METHODS
We evaluated the polymorphism by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in 150 Type 2 DM patients and 147 healthy control subjects. The frequency of alleles encoding threonine (Thr54) and alanine (Ala54) at codon 54 of FABP2 in Type 2 DM patients was compared with that of healthy controls. Insulin sensitivity was assessed by the hyperinsulinaemic euglycaemic clamp in Type 2 DM patients with Ala54 homozygotes, Ala54/Thr54 heterozygotes and Thr54 homozygotes and by homeostasis model assessment (HOMA) in the nondiabetic group.


RESULTS
The frequency of alleles encoding Ala54 and Thr54 was 0.59 and 0.41 in Type 2 DM patients, respectively, similar to that observed in nondiabetic controls (0.64 for Ala54 and 0.36 for Thr54). Insulin sensitivity was not significantly different between subjects with and without Thr54 allele either within the DM group or healthy controls.


CONCLUSIONS
The allele encoding threonine in the FABP2 does not predispose to Type 2 DM or insulin resistance in the Japanese population.
Ito
K
K
Third Department of Internal Medicine, Mie University School of Medicine, Tsu, Japan. naika3@clin.medic.mie-u.ac.jp
Nakatani
K
K
Fujii
M
M
Katsuki
A
A
Tsuchihashi
K
K
Murata
K
K
Goto
H
H
Yano
Y
Y
Gabazza
E C
EC
Sumida
Y
Y
Adachi
Y
Y
D002352:Carrier Proteins / Q000235:genetics*; D016022:Case-Control Studies; D003062:Codon; D000071438:Fatty Acid-Binding Protein 7; D050556:Fatty Acid-Binding Proteins; D005260:Female; D006801:Humans; D007333:Insulin Resistance / Q000235:genetics*; D007413:Intestinal Mucosa / Q000378:metabolism*; D007564:Japan; D008297:Male; D008875:Middle Aged; D018996:Myelin P2 Protein / Q000235:genetics*; D009363:Neoplasm Proteins; D011110:Polymorphism, Genetic; D025521:Tumor Suppressor Proteins
D002352:Carrier Proteins; D003062:Codon; C493404:FABP2 protein, human; C107608:FABP7 protein, human; C493405:Fabp2 protein, mouse; D000071438:Fatty Acid-Binding Protein 7; D050556:Fatty Acid-Binding Proteins; D018996:Myelin P2 Protein; D009363:Neoplasm Proteins; D025521:Tumor Suppressor Proteins