1. bookVolume 25 (2017): Issue 3 (July 2017)
Journal Details
License
Format
Journal
eISSN
2284-5623
First Published
08 Aug 2013
Publication timeframe
4 times per year
Languages
English
access type Open Access

Laboratory diagnosis and follow-up of Romanian Gaucher disease patients

Published Online: 01 Aug 2017
Page range: 275 - 285
Received: 26 Feb 2017
Accepted: 03 May 2017
Journal Details
License
Format
Journal
eISSN
2284-5623
First Published
08 Aug 2013
Publication timeframe
4 times per year
Languages
English
Abstract

Background: Gaucher disease (GD) is caused by a recessively inherited deficiency of glucocerebrosidase which is encoded by the GBA gene in which nearly 450 mutations have been described. However, only a few genotype- phenotype correlations have been clearly established. The aim of this study was to investigate molecular features of GD in Romanian patients and to evaluate their impact on treatment response. Material and methods: 69 patients, diagnosed between 1997 and 2014 at our national referral laboratory, were included in this study. Frequent point mutations (N370S, L444P, 84GG, R463C) were detected by amplification and restriction enzyme digestion. Recombinant alleles (recTL, recNciI, recA456P) were screened by DNA sequencing. Plasma chitotriosidase served as a biomarker of disease severity throughout the follow-up period. Results: 66 patients had the non-neuronopathic (type 1) form of GD and 3 had the chronic neuronopathic (type 3) phenotype. We identified 79% of the mutant alleles, among which the most frequent mutations were N370S (54%) and L444P (18%). We found a statistically significant (p<0.001) and moderate to good correlation between the total therapeutic dose and the residual chitotriosidase activity (R = 0.621). After two years of treatment, we noticed statistically significant variations in chitotriosidase activity corresponding to the most frequent genotypes (N370S/ unknown allele, N370S/L444P, N370S/N370S and N370S/R463Q). Conclusions: Allele distribution displayed specific features in Romanian GD patients, such as the high prevalence of the N370S allele. Chitotriosidase activity measurement allowed the investigation of genotype influence on treatment outcome.

Keywords

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