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Evidence of the milder phenotypic spectrum of c.1582G>A PIGT variant: Delineation based on seven novel Polish patients.

Clinical genetics

Authors: Aleksandra Jezela-Stanek, Elżbieta Szczepanik, Hanna Mierzewska, Małgorzata Rydzanicz, Karolina Rutkowska, Alexej Knaus, Robert Śmigiel, Iwona Stępniak, Michał G Markiewicz, Snir Boniel, Peter Krawitz, Rafał Płoski

PIGT is one of over 29 glycosylphosphatidylinositol biosynthesis defect genes. Mutations cause genetically determined disorders characterized mainly by epilepsy with fever-sensitivity, central hypotonia, psychomotor delay and congenital malformations. The disease is known as multiple congenital anomalies-hypotonia-seizures syndrome 3 (MCAHS3) or glycosylphosphatidylinositol biosynthesis defect-7. Twenty-eight cases have been reported until today. We present seven novel Polish patients, all harboring 1582G>A variant in a homozygous or compound heterozygous state which seems to cause a milder phenotype of the disease.

© 2020 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

PMID: 32725661

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