Genotype-phenotype correlation of 17 cases of Pompe disease in Spanish patients and identification of 4 novel GAA variants.

Autor: Hernández-Arévalo P; Fundación Pública Andaluza para la Gestión de la Investigación en Salud de Sevilla (FISEVI), Molecular Diagnosis and Rare Diseases Laboratory, Department of Clinical Biochemistry, Hospital Universitario Virgen del Rocío, Seville, Spain., Santotoribio JD; Molecular Diagnosis and Rare Diseases Laboratory, Department of Clinical Biochemistry, Hospital Universitario Virgen del Rocío, Seville, Spain., Delarosa-Rodríguez R; Fundación Pública Andaluza para la Gestión de la Investigación en Salud de Sevilla (FISEVI), Molecular Diagnosis and Rare Diseases Laboratory, Department of Clinical Biochemistry, Hospital Universitario Virgen del Rocío, Seville, Spain., González-Meneses A; Dysmorphology Unit, Department of Pediatrics, Hospital Universitario Virgen del Rocío, Seville, Spain., García-Morillo S; Collagenosis and Minority Diseases Unit, Experimental Cardiovascular Risk Unit, Department of Internal Medicine, Hospital Universitario Virgen del Rocío, Seville, Spain., Jiménez-Arriscado P; Molecular Diagnosis and Rare Diseases Laboratory, Department of Clinical Biochemistry, Hospital Universitario Virgen del Rocío, Seville, Spain., Guerrero JM; Department of Clinical Biochemistry and Molecular Biology Hospital Universitario Virgen del Rocío, Institute of Biomedicine of Seville (Ibis),, Seville University, Seville, Spain., Macher HC; Molecular Diagnosis and Rare Diseases Laboratory, Department of Clinical Biochemistry, Hospital Universitario Virgen del Rocío, Seville, Spain. hadacmacher@icloud.com.
Jazyk: angličtina
Zdroj: Orphanet journal of rare diseases [Orphanet J Rare Dis] 2021 May 21; Vol. 16 (1), pp. 233. Date of Electronic Publication: 2021 May 21.
DOI: 10.1186/s13023-021-01864-8
Abstrakt: Background: 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.
Methods: 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.
Results: 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.
Conclusions: 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.
Databáze: MEDLINE
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