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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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