A Missense Mutation of the α-Galactosidase A Gene in a Chinese Family of Fabry Disease with Renal Failure
Background: Fabry disease (FD) is a rare disease due to an X-linked recessive inborn error of glycosphingolipid metabolism resulting from the mutations of the α-galactosidase A (α-gal A) gene. FD is rare in Chinese and the data on clinic and genetic features of FD is still limited. Methods: In this...
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| Main Authors: | , , , |
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| Format: | Book |
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Karger Publishers,
2013-06-01T00:00:00Z.
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| Summary: | Background: Fabry disease (FD) is a rare disease due to an X-linked recessive inborn error of glycosphingolipid metabolism resulting from the mutations of the α-galactosidase A (α-gal A) gene. FD is rare in Chinese and the data on clinic and genetic features of FD is still limited. Methods: In this study, the α-gal A gene of a Chinese family diagnosed with FD was analyzed for mutations and the genetic features of FD in this family were presented. Results: The α-gal A activity of the proband in this family was 0.03 nmol/ml/h in the whole blood. By PCR amplification and sequencing of the α-gal A gene exons, a single C-to-T transition was identified in codon 112 of exon 2. This C-to-T transition, mapping to position 334 in the cDNA of the α-gal A gene, was a missense mutation predicting a substitution of arginine to cysteine (p.R112C), which disrupts the normal activity of α-gal A enzyme. No further mutations were found in other exons of the α-gal A gene. In contrast to previous reports, in this family, all of the five male patients developed end-stage renal failure due to this missense mutation. Conclusions: These findings suggest that the missense mutation, p.R112C, in α-gal A gene ablates its activity and results in the development of FD with the renal damage. |
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| Item Description: | 1420-4096 1423-0143 10.1159/000350147 |