title: Glutaric Acidemia Type 1-Clinico-Molecular Profile and Novel Mutations in GCDH Gene in Indian Patients.
abstract: Glutaric acidemia I (GA I, #231670) is one of the treatable, autosomal recessively inherited metabolic disorders. Macrocephaly, acute encephalitis-like crises, dystonia and characteristic frontotemporal atrophy are the hallmarks of this disease. In this communication, we present the clinical, biochemical and molecular profile of seventeen GA I patients from 15 unrelated families from India and report seven novel mutations in GCDH gene (c.281G>A (p.Arg94Gln), c.401A>G (p.Asp134Gly), c.662T>C (p.Leu221Pro), c.881G>C (p.Arg294Pro), c.1173dupG (p.Asn392Glufs*5), c.1238A>G (p.Tyr413Cys) and c.1241A>C (p.Glu414Ala)). Out of these, c.662T>C (p.Leu221Pro) in exon 8 and c.281G>A (p.Arg94Gln) allele in exon 4 were low excretor alleles, whereas c.1241A>C (p.Glu414Ala), c.1173dupG and c.1207C>T (p.His403Tyr) in exon 11 were high excretor alleles. We conclude that c.1204C>T (p.Arg402Trp) is probably the most common mutant allele. Exons 11 and 8 are the hot spot regions of GCDH gene in Indian patients with GA I. An early diagnosis and timely intervention can improve the underlying prognosis. Molecular confirmation is helpful in providing genetic counselling and prenatal diagnosis in subsequent pregnancy.
authors.affiliation: Division of Genetics, Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, 110029, India.
authors.forename: Neerja
authors.initials: N
authors.lastname: Gupta
authors.forename: Pawan Kumar
authors.initials: PK
authors.lastname: Singh
authors.forename: Manoj
authors.initials: M
authors.lastname: Kumar
authors.forename: Shivaram
authors.initials: S
authors.lastname: Shastri
authors.forename: Sheffali
authors.initials: S
authors.lastname: Gulati
authors.forename: Atin
authors.initials: A
authors.lastname: Kumar
authors.forename: Anuja
authors.initials: A
authors.lastname: Agarwala
authors.forename: Seema
authors.initials: S
authors.lastname: Kapoor
authors.forename: Mohandas
authors.initials: M
authors.lastname: Nair
authors.forename: Savita
authors.initials: S
authors.lastname: Sapra
authors.forename: Sudhisha
authors.initials: S
authors.lastname: Dubey
authors.forename: Ankur
authors.initials: A
authors.lastname: Singh
authors.forename: Punit
authors.initials: P
authors.lastname: Kaur
authors.forename: Madhulika
authors.initials: M
authors.lastname: Kabra