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ȣ - 510379 17 |
Relationship among sRAGE, AGE and CRP according to RAGE Gly82Ser and obesity status in Korean men |
1연세대학교 노화과학연구소, 2연세대학교 임상영양유전 국가지정연구실, 3연세대학교 노화과학협동과정, 4연세대학교 의과대학 심장내과, 5연세의료원 심혈관계질환유전체센터 |
1,2김지영, 1,2김오연, 3조석현, 1,2채지숙, 4김성애, 4안철민, 4박성하, 1,2이종호, 1,4,5장양수 |
Background: We studied the relationship among soluble receptor for advanced glycation end products (sRAGE), AGE and inflammatory markers according to RAGE Gly82Ser gene polymorphism, obesity and a low-grade inflammatory state.
Methods and Results: we measured circulating concentrations of sRAGE, AGE and inflammatory markers (CRP and IL-6) in Korean men. A total of 1252 men aged 30~70 years with body mass index≥18.5kg/m2 were recruited. Anthropometric parameters, lipid profiles, glucose, RAGE G82S polymorphism, sRAGE, AGEs, and inflammatory markers (CRP and IL-6) were measured. sRAGE concentrations were lowest in those with homozygous mutation,‘S/S’(G/G: 1036.3±40.3, G/S: 807.0±49.6 and S/S: 443.0±47.8pg/ml, p<0.001), which maintained after adjusted for age, BMI, cigarette smoking and alcohol drinking (p<0.001). Stepwise regression showed that RAGE Gly82Ser genotype (β-coefficient=-0.384, p<0.001) and BMI (β-coefficient=-0.168, p=0.001) were major influencing factors on sRAGE concentration. Obese subjects (BMI≥25kg/m2) had significantly lower levels of sRAGE(831.7±36.7pg/ml) than non-obese subjects (1022.7±47.8pg/ml) (p=0.009). In Obese subjects, the ‘S/S’group had lower concentrations of sRAGE (439.5±57.7pg/ml) than the G/G (917.5±45.7 pg/ml) or the G/S group (768.8±56.1pg/ml) (p<0.001). Furthermore, the obese subject with the S/S genotype showed higher concentrations of AGE and CRP comparing with those with the G/G or G/S genotype (p=0.012 and p=0.006, respectively).
Conclusion: sRAGE is influenced by RAGE G82S polymorphism and obesity status as a result of enhanced AGE-RAGE binding affinity. Inflammatory condition such as obesity not only decreases sRAGE levels but also increases AGE and CRP levels particularly in subjects with RAGE 82 S/S genotype.
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