Molecular characterisation and prenatal diagnosis of Asparto-acylase deficiency (Canavan disease)--report of two novel and two known mutations from the Indian subcontinent.

Abstract:

OBJECTIVES:To establish a technique for mutation identification and prenatal screening in confirmed cases of Canavan disease. METHOD:Mutations in ASPA gene were identified by sequencing. Six exons of ASPA gene were amplified using intronic primers flanking the exons and then sequenced on ABI 3500Dx automated unit. This technique was used to identify mutations in three cases of Canavan disease. Prenatal diagnosis was performed in two families. RESULTS:Two reported mutations c.162 C > A (p.Asn54Lys) and c.859 G > A (p.Ala287Thr) were identified in two different cases of Canavan disease. Third case was compound heterozygous for two novel mutations (c.728 T > G, p.Ile243Ser; c.902 T > C, p.Leu301Pro). Prenatal diagnosis was performed in three pregnancies in two families, two affected fetuses and one unaffected fetus were identified. CONCLUSIONS:Molecular characterization of Canavan disease helps identify the cause at genetic level, thus confirming diagnosis and enabling identification of carriers in the family. Though enzyme assay and NAA measurement allows diagnosis and prenatal diagnosis of Canavan diasease, molecular methods have the advantage of bringing accuracy in prenatal testing with an earlier result. This is the first case report of mutation studies in Canavan disease from Indian subcontinent.

journal_name

Indian J Pediatr

authors

Bijarnia S,Kohli S,Puri RD,Jacob RJ,Saxena R,Jalan A,Sistermans EA,Mahmood S,Verma IC

doi

10.1007/s12098-012-0862-1

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

26-31

issue

1

eissn

0019-5456

issn

0973-7693

journal_volume

80

pub_type

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