The PC-1 Q121 allele is exceptionally prevalent in the Dominican Republic and is associated with type 2 diabetes.
The human glycoprotein PC-1 codon Q121 allele has been correlated with insulin resistance, but not with type 2 diabetes or obesity. We investigated the prevalence of PC-1 Q121 in the Dominican Republic population (755 subjects studied) and whether this variant is associated with insulin resistance, obesity, or type 2 diabetes. The prevalence of PC-1 Q121 was high compared with that in other populations. The proportions of genotypes detected were: KK, 21.6%; KQ, 48.3%; and QQ, 30.1%. This compares to approximately 74%, 24%, and 2% in other populations. Among nonobese, nondiabetic subjects, the insulin response of KQ (P = 0.027) and QQ (P = 0.031) subjects was greater during the oral glucose tolerance test than that of KK subjects, whereas plasma glucose profiles were comparable. The Q allele was more prevalent in obese type 2 diabetics than in controls (P = 0.026; odds ratio = 1.56). Multiple regression analysis, after adjusting for age, gender, and body mass index, showed the QQ genotype to be associated with type 2 diabetes (P = 0.043; odds ratio = 2.74), but not obesity (P = 0.068). These results indicate that the PC-1 Q121 allele is exceptionally prevalent in the Dominican Republic, contributing to both insulin resistance and type 2 diabetes.
Department of Internal Medicine I, Faculty of Medicine, Oita University, Oita 879-5593, Japan.
Kazuyuki
K
Hamaguchi
Hideo
H
Terao
Yoichiro
Y
Kusuda
Tsutomu
T
Yamashita
J A
JA
Hazoury Bahles
Modesto
M
Cruz LL
Luis Iván
LI
Brugal V
Bienvenido
B
Jongchong W
Hironobu
H
Yoshimatsu
Toshiie
T
Sakata
D000328:Adult; D000483:Alleles; D003920:Diabetes Mellitus / Q000453:epidemiology / Q000235:genetics; D003924:Diabetes Mellitus, Type 2 / Q000453:epidemiology* / Q000235:genetics*; D004293:Dominican Republic / Q000453:epidemiology; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000453:epidemiology; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity; D010727:Phosphoric Diester Hydrolases / Q000235:genetics*; D011110:Polymorphism, Genetic; D015995:Prevalence; D011755:Pyrophosphatases / Q000235:genetics*
D010727:Phosphoric Diester Hydrolases; C065962:ectonucleotide pyrophosphatase phosphodiesterase 1; D011755:Pyrophosphatases