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KMID : 0359920120310040234
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Korean Journal of Nephrology
2012 Volume.31 No. 4 p.234 ~ p.241
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Impact of gene polymorphisms of interleukin-18, transforming growth factor-b, and vascular endothelial growth factor on development of IgA nephropathy and thin glomerular basement membrane disease
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Jung Hee-Yeon
Cho Jang-Hee
Lim Jeong-Hoon
Yu Chung-Hoon
Choi Ji-Young
Yoon Se-Hee
Park Sun-Hee
Kim Yong-Lim
Kim Chan-Duck
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Abstract
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Background:We investigated the effects of gene polymorphisms on the development of IgA nephropathy and thin glomerular basement membrane (GBM) disease by analyzing polymorphisms in the interleukin (IL)-18, transforming growth factor (TGF)-b, and vascular endothelial growth factor (VEGF) genes in Korean patients. Methods:This study included 146 normal individuals and 69 biopsy-proven IgA nephropathy and 44 thin GBM disease patients. The gene polymorphisms 607A/C and 137G/C in IL-18, 509C/T and T869C in TGF-b, and 2578C/A and 405C/G in VEGF were investigated in DNA extracted from peripheral blood. Results:The frequencies of the IL-18 607CC genotype (43.5% vs. 21.2%, P¼0.002, P corrected¼0.012) and the VEGF 405GG genotype (37.7% vs. 21.2%, P¼0.002, P corrected¼0.012) were significantly increased in the IgA nephropathy group compared with the control group, whereas no significant differences in genotype frequency were observed between the thin GBM disease and control groups. However, there were no significant differences in genotype and allele frequencies between the IgA nephropathy and thin GBM disease groups. Conclusion:This study did not show any statistically significant differences of six selected gene polymorphisms of the IL-18, TGF-b, and VEGF genes between IgA nephropathy and thin GBM disease. Additional extensive studies are required to clarify the potential role of gene polymorphism to discriminate IgA nephropathy and thin GBM disease without renal biopsy.
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KEYWORD
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Hematuria, IgA glomerulonephritis, Interleukin-18, Single nucleotide polymorphism, Transforming growth factor-b1, Vascular endothelial growth factor
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