Detection of c. − 32T>G (IVS1 − 13T>G) mutation of Pompe disease by real-time PCR in dried blood spot specimen

• Published in: Clinica chimica acta Vol. 418; pp. 107 - 108
• Main Authors: Bobillo Lobato, Joaquin, Sánchez Peral, Blas A., Durán Parejo, Pilar, Jiménez Jiménez, Luis M.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 15-03-2013
• Subjects: Base Sequence; c. − 32T>G (IVS1 − 13T>G) mutation; DNA - genetics; DNA - isolation & purification; Dried Blood Spot Testing; Dried blood spots; Glycogen Storage Disease Type II - genetics; Humans; Mutation, Missense; Pompe disease; Real time polymerase chain reaction; Sensitivity and Specificity; Temperature; Pompe disease; c. −32T>G (IVS1−13T>G) mutation; DBS; Dried blood spots; GAA; GSDII; PCR; Real time polymerase chain reaction
• ISSN: 0009-8981; 1873-3492
• DOI: 10.1016/j.cca.2012.12.015

Pompe disease, or acid maltase deficiency, is a genetic muscle disorder caused by mutations in the gene encoding the acid alpha-glucosidase (GAA) enzyme, which is essential for the degradation of glycogen to glucose in lysosomes. The wide clinical variability is resulted from genetic heterogeneity, and many different mutations of the GAA gene have been reported. Some of these mutations are associated with specific phenotypes, such as the c. −32T>G (IVS1−13T>G) mutation seen in late-onset Pompe disease.
We used a real-time PCR, after genomic DNA extraction isolated from DBS (dried blood spots) and PCR amplification.
Our results successfully detected in controls and patients have been 100% concordant with sequencing results.
This assay combines simple sample processing and rapid analysis and it allows to detect the patients with a milder form and slower progression of this disease with a high reliability.