title: Association Between Heme Oxygenase-1 Promoter Polymorphisms and the Development of Albuminuria in Type 2 Diabetes: A Case-Control Study.
abstract: Heme oxygenase (HO)-1 is a key enzyme in cytoprotective mechanisms against oxidative stress in the cardiovascular-renal system. The T(-413)A single nucleotide polymorphism (SNP) and (GT)n microsatellite polymorphism in the HO-1 gene promoter modulate the HO-1 gene transcriptional activity and these polymorphisms are associated with various human diseases.We investigated the association between HO-1 promoter polymorphisms and nephropathy in type 2 diabetes. We sequenced the T(-413)A SNP and (GT)n repeat segments of the HO-1 gene promoter in 536 patients with type 2 diabetes. (GT)n alleles were divided into 2 groups: short (S, ≤25 GT repeats) and long (L, >25 GT repeats) alleles. The presence of albuminuria was used as a marker of diabetic nephropathy.Patients with the TT genotype in the T(-413)A SNP were significantly more susceptible to albuminuria development than those carrying the A allele, with an odds ratio of 1.577 (95% confidence interval, 1.088 - 2.285; P = 0.016). Subgroup analysis showed that patients carrying the TT genotype with long duration of diabetes (≥20 years), poor glycemic control, male gender and without hypertension had higher odds ratios for the development of albuminuria. In vitro, promoter activity of the T(-413)A SNP was higher with A allele than T allele. Regarding to the (GT)n repeats, the LL genotype showed a higher odds ratio for the development of albuminuria only in patients with hypertension when compared to the S allele.In conclusion, the T(-413)A SNP in the HO-1 promoter is significantly associated with albuminuria development in type 2 diabetes patients, especially with longer duration and poor glycemic control.
authors.affiliation: From the Department of Internal Medicine, College of Medicine, Catholic University of Korea, Seoul, Korea and Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, Korea (EYL); Department of Internal Medicine, Graduate School, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Republic of Korea (EYL); Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Republic of Korea (Y-HL, OK, B-WL, ESK, B-SC, HCL); Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, Republic of Korea (Y-HL, SHK, OK, B-WL, ESK, B-SC, HCL); Division of Gastroenterology, Department of Internal Medicine, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Republic of Korea (KSJ); Division of Nephrology, Department of Internal Medicine, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Republic of Korea (BSK); Department of Preventive Medicine, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Republic of Korea (CMN); and Department of Physiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea (CSP).
authors.forename: Eun Young
authors.initials: EY
authors.lastname: Lee
authors.forename: Yong-Ho
authors.initials: YH
authors.lastname: Lee
authors.forename: Soo Hyun
authors.initials: SH
authors.lastname: Kim
authors.forename: Kyu Sik
authors.initials: KS
authors.lastname: Jung
authors.forename: Obin
authors.initials: O
authors.lastname: Kwon
authors.forename: Beom Seok
authors.initials: BS
authors.lastname: Kim
authors.forename: Chung Mo
authors.initials: CM
authors.lastname: Nam
authors.forename: Chun Sik
authors.initials: CS
authors.lastname: Park
authors.forename: Byung-Wan
authors.initials: BW
authors.lastname: Lee
authors.forename: Eun Seok
authors.initials: ES
authors.lastname: Kang
authors.forename: Bong-Soo
authors.initials: BS
authors.lastname: Cha
authors.forename: Hyun Chul
authors.initials: HC
authors.lastname: Lee
mesh_terms: D000368:Aged; D000419:Albuminuria / Q000235:genetics*; D016022:Case-Control Studies; D003924:Diabetes Mellitus, Type 2 / Q000150:complications*; D005260:Female; D005838:Genotype; D051547:Heme Oxygenase-1 / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic
chemical_list: D051547:Heme Oxygenase-1