KMID : 0191120090240000210
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Journal of Korean Medical Science 2009 Volume.24 No. 0 p.210 ~ p.214
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Two Korean Infants with Genetically Confirmed Congenital Nephrotic Syndrome of Finnish Type
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Lee Beom-Hee
Ahn Yo-Han Choi Hyun-Jin Kang Hee-Kyung Kim Sung-Do Cho Byoung-Soo Moon Kyung-Chul Ha Il-Soo Cheong Hae-Il Choi Yong
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Abstract
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Congenital nephrotic syndrome is defined as nephrotic syndrome which manifests in utero or during the first 3 months of life. The prototype of congenital nephrotic syndrome is congenital nephrotic syndrome of Finnish type (CNF, OMIM #602716), which is caused by loss-of-function mutations of the nephrin gene (NPHS1). There have been few clinical case reports of CNF in Korea, but none of which was confirmed by genetic study. Here, we report two children with congenital nephrotic syndrome. Genetic analysis of the NPHS1 gene revealed compound heterozygous frame-shifting mutations (c.2156_2163 delTGCACTGC causing p.L719DfsX4 and c.3250_3251insG causing p.V1084GfsX12) in one patient and a missense mutation (c.1381G>A causing p.R460Q) and a nonsense mutation (c.2442C>G causing p.Y814X) in the other patient. The nonsense mutation was novel. The clinical courses of the patients were typical of CNF. This is the first report of genetically confirmed CNF in Korea to date. The early genetic diagnosis of CNF is important for proper clinical management of the patients and precise genetic counseling of the families.
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KEYWORD
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Congenital Nephrotic Syndrome, Congenital Nephrotic Syndrome of Finnish Type, NPHS1 Gene, Nephrin, Mutation
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