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Chin HJ, Cho HJ, Lee TW, Na KY, Oh KH, Joo KW, Yoon HJ, Kim YS, Ahn C, Han JS, Kim S, Jeon ES, Jin DC, Kim YL, Park SH, Kim CD, Song YR, Kim SG, Kim YG, Lee JE, Oh YK, Lim CS, Lee SK, Chae DW, Cho WY, Kim HK, Jo SK. The mildly elevated serum bilirubin level is negatively associated with the incidence of end stage renal disease in patients with IgA nephropathy. J Korean Med Sci 2009; 24 Suppl:S22-9. [PMID: 19194557 PMCID: PMC2633177 DOI: 10.3346/jkms.2009.24.s1.s22] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Accepted: 11/17/2008] [Indexed: 11/26/2022] Open
Abstract
Oxidative stress plays various roles in the development and progression of IgA nephropathy, while bilirubin is known as a potent antioxidant. We therefore hypothesized that serum bilirubin would be associated with renal prognosis in IgA nephropathy. The study subjects comprised 1,458 adult patients with primary IgA nephropathy in Korea. We grouped patients according to the following quartile levels of bilirubin: <0.4 mg/dL (Q1), 0.4-0.5 mg/dL (Q2), 0.6-0.7 mg/dL (Q3), and >0.8 mg/dL (Q4). The outcome data were obtained from the Korean Registry of end-stage renal disease (ESRD). Eighty patients (5.5%) contracted ESRD during a mean follow-up period of 44.9 months. The ESRD incidences were 10.7% in Q1, 8.2% in Q2, 2.8% in Q3, and 2.8% in Q4 (p<0.001). The relative risk of ESRD compared to that in Q1 was 0.307 (95% confidence interval [CI], 0.126-0.751) in Q3 and 0.315 (95% CI, 0.130-0.765) in Q4. The differences of ESRD incidence were greater in subgroups of males and of patients aged 35 yr or more, with serum albumin 4.0 g/dL or more, with normotension, with eGFR 60 mL/min/1.73 m(2) or more, and with proteinuria less then 3+ by dipstick test. In conclusion, higher bilirubin level was negatively associated with ESRD incidence in IgA nephropathy.
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Affiliation(s)
- Ho Jun Chin
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Hyun Jin Cho
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Tae Woo Lee
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Ki Young Na
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Kook Hwan Oh
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Kwon Wook Joo
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Hyung Jin Yoon
- Clinical Research Institute, Seoul National University Hospital, Seoul, Korea
| | - Yon-Su Kim
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Curie Ahn
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Jin Suk Han
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Suhnggwon Kim
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - En Sil Jeon
- Biotechnology Center, Pohang University of Science and Technology, Pohang, Korea
| | - Dong Chan Jin
- Department of Internal Medicine, Catholic University Medical College, Seoul, Korea
| | - Yong-Lim Kim
- Department of Internal Medicine, Kyungpook National University, School of Medicine, Daegu, Korea
| | - Sun-Hee Park
- Department of Internal Medicine, Kyungpook National University, School of Medicine, Daegu, Korea
| | - Chan-Duck Kim
- Department of Internal Medicine, Kyungpook National University, School of Medicine, Daegu, Korea
| | - Young Rim Song
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Seong Gyun Kim
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Yoon Goo Kim
- Department of Medicine, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - Jung Eun Lee
- Department of Medicine, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - Yoon Kyu Oh
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Boramae Medical Center, Seoul, Korea
| | - Chun Soo Lim
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Boramae Medical Center, Seoul, Korea
| | - Sang Koo Lee
- Department of Internal Medicine, Ulsan University College of Medicine, Asan Medical Center, Seoul, Korea
| | - Dong-Wan Chae
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Renal Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Won Yong Cho
- Department of Internal Medicine and the Institute of Renal Disease, Korea University College of Medicine, Seoul, Korea
| | - Hyoung Kyu Kim
- Department of Internal Medicine and the Institute of Renal Disease, Korea University College of Medicine, Seoul, Korea
| | - Sang-Kyung Jo
- Department of Internal Medicine and the Institute of Renal Disease, Korea University College of Medicine, Seoul, Korea
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Kim J. Association of CHRNA2 polymorphisms with overweight/obesity and clinical characteristics in a Korean population. Clin Chem Lab Med 2008; 46:1085-9. [PMID: 18588430 DOI: 10.1515/cclm.2008.230] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Genes correlated with nicotine may be important in obesity because of the role of nicotine in food intake. METHODS To determine if single nucleotide polymorphisms (SNPs) in the neuronal nicotinic acetylcholine receptor alpha2 subunit gene (CHRNA2) are associated with overweight/obesity, 156 non-obese and 200 overweight/obese Koreans were genotyped for four CHRNA2 SNPs using an Affymetrix Array Chip. RESULTS Of four SNPs, only one, rs2043063, was associated with overweight/obesity in the study population (co-dominant, p=0.049; dominant, p=0.027). Associations between the significant SNP and obesity-related clinical characteristics were observed, but these were not significant. CONCLUSIONS The CHRNA2 rs2043063 SNP might be a risk factor for overweight/obesity in Koreans. Therefore, further studies are needed to investigate whether mutations or common polymorphisms of the CHRNA2 gene represent a risk factor for obesity.
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Affiliation(s)
- Jinju Kim
- Department of Oriental Physiology, College of Pharmacy, Kyung Hee University, Seoul, Korea.
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