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Kidney Int. 2000 Feb;57(2):401-4.

Novel mutation in the nephrin gene of a Japanese patient with congenital nephrotic syndrome of the Finnish type.

Author information

1
Department of Pediatrics, Okayama University Medical School, Okayama, Japan.

Abstract

BACKGROUND:

Congenital nephrotic syndrome (CNS) of the Finnish type is a rare autosomal-recessive disorder. Kestila et al reported that a positionally cloned gene for a novel glomerular protein nephrin is mutated in CNS. Most Finnish patients have one of two mutations. In this study, we described a Japanese CNS family associated with a novel missense point mutation in the nephrin gene.

METHODS:

Reverse transcription-polymerase chain reaction, polymerase chain reaction, and sequence analysis were used.

RESULTS:

The patient had the three missense mutations homozygously. One mutation was already reported as sequence variant. The two other novel mutations were the GAG to AAG transition, leading to a Glu447Lys and the GAC to GTC transition, predicting an Asp819Val substitution in the nephrin protein.

CONCLUSION:

Our findings indicate that an abnormality of nephrin may cause CNS of the Finnish type in Japanese subjects.

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