Publication: Genotype-phenotype correlation of 17 cases of Pompe disease in Spanish patients and identification of 4 novel GAA variants.
Loading...
Identifiers
Date
2021-05-21
Authors
Hernández-Arévalo, Paula
Santotoribio, José D
Delarosa-Rodríguez, Rocío
González-Meneses, Antonio
García-Morillo, Salvador
Jiménez-Arriscado, Pilar
Guerrero, Juan M
Macher, Hada C
Advisors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Pompe disease (PD) is an autosomal recessive metabolic disorder caused by pathogenic variants in the acid α-glucosidase gene (GAA) that produces defects in the lysosomal acid α-1,4-glucosidase. We aimed to identify genetic variations and clinical features in Spanish subjects to establish genotype-phenotype correlation. A total of 2637 samples of patients who showed symptoms or susceptible signs of PD were enrolled in this observational study. Enzymatic activity was detected by fluorometric techniques and the genetic study was carried out using Next-Generation Sequencing. Fourteen different variants from 17 diagnosed patients were identified, seven males and nine females with LOPD (mean age 36.07, SD 20.57, range 7-64) and a 2-day-old boy with IOPD, four genetic variants had not been described in the literature previously, including a homozygous variant. In all of them α-glucosidase activity was decreased. Muscle weakness, respiratory distress, exercise intolerance, hypotonia, dysphagia and myalgia were commonly observed in patients. This study report four new genetic variants that contribute to the pathogenic variants spectrum of the GAA gene. We confirm that patients in Spain have a characteristic profile of a European population, with c.-32-13T>G being the most prevalent variant. Furthermore, it was confirmed that the c.236_246delCCACACAGTGC pathogenic variant in homozygosity is associated with early disease and a worse prognosis.
Description
MeSH Terms
Adult
Female
Genetic Association Studies
Glycogen Storage Disease Type II
Homozygote
Humans
Male
Spain
alpha-Glucosidases
Female
Genetic Association Studies
Glycogen Storage Disease Type II
Homozygote
Humans
Male
Spain
alpha-Glucosidases
DeCS Terms
CIE Terms
Keywords
Alpha-glucosidase enzyme, GAA gene, Genotype–phenotype correlation, Pompe disease