Review Article

Genetic Variance in Uncoupling Protein 2 in Relation to Obesity, Type 2 Diabetes, and Related Metabolic Traits: Focus on the Functional −866G>A Promoter Variant (rs659366)

Table 2

Summary of association studies of the UCP2 promoter −866G>A (rs659366) polymorphism in relation to obesity and related metabolic traits.

Ethnic population (Frequency of A-allele in %) (Frequency of A-allele in %)PhenotypesReference

Caucasian340 (46.5)256 (52.2)Common G-allele predisposed to obesity Esterbauer et al. 2001 [74]
109 (31.2)589 (38.2)

Caucasian749 (39.6)816 (40.7)Not associated with obesity or BMI within groupsDalgaard et al. 2003 [60]

Caucasian122 (28.2)374 (29.0)Not associated with obesity or BMI within groups Mancini et al. 2003 [79]
76 (34.9)

Caucasian302 (32.1)Not associated with BMI within groupSesti et al. 2003 [72]

Caucasian565 (32.4)Not associated with BMI in control or diabetic patients D’Adamo et al. 2004 [80]
483 (33.6)

Japanese134Not associated with BMI, but with hypertension Ji et al. 2004 [81]
342

Caucasian296 (37.0)A-allele associated with decreased lipid oxidationLe Fur et al. 2004 [89]

Caucasian327 (34.6)Not associated with BMI within group Bulotta et al. 2005 [82]
746 (28.6)

Pima864 (54.0)Not associated with BMI within group. AA genotype increased 24 hr EE Kovacs et al. 2005 [83]
Indians263 (55.5)

Korean658Not associated with BMI within group. Associated with decreased HDL-levelsCha et al. 2007 [59]

Caucasian598Not associated with BMI within group. A-allele associated with decreased W/H-ratio and lower fasting p-insulin Gable et al. 2007 [84] P
653

Filipino1755 (29.7)Not associated with BMI within groupMarvelle et al. 2008 [85]

Caucasian375 (41.3)2316 (35.8)A-allele associated with obesity and associated with increased risk of CHD and systolic BP. AA genotype associated with increased oxidative stressDhamrait et al. 2004 [77]

Caucasian192 (38.3)170 (38.2)AA genotype significantly associated with obesity and insulin resistance in childrenOchoa et al. 2007 [76]

Caucasian225 (39.6)294 (38.9)AA genotype associated with various indices of obesityKring et al. 2008 [78]

Caucasian277188Not associated with early-onset obesitySchäuble et al. 2003 [86]

Caucasian681 (36.9)Not associated with BMI in type 2 diabetic patients, but AA genotype associated with increased triglyceride and cholesterol levelsReis et al. 2004 [90]

Various3784 (35.4–46.7)Not associated with obesity, allele-frequencies not given for obese subjectsHsu et al. 2008 [87]

Korean1469 (~48)GG genotype associated with obesity in children but protective in adultsJun et al. 2009 [75]

Caucasian507AA genotype decreased total cholesterol and decreased LDL-cholesterol. Not associated with BMI within groupSalopuro et al. 2009 [88] P

Indian200 (42.0)240 (32.2)A-allele associated with obesity and hyperinsulinemia (in obese subjects)Srivastava et al. 2010 [91]

PDenotes prospective study. Abbreviations: CHD: coronary heart disease; BP: blood pressure; EE: energy expenditure; BMI: body mass index; HDL: high density lipoprotein; W/H: waist to hip.