Paper Information

Journal:   IRANIAN JOURNAL OF CHILD NEUROLOGY (IJCN)   SPRING 2013 , Volume 7 , Number 2; Page(s) 23 To 29.
 
Paper: 

A NOVEL DELETION MUTATION IN ASPM GENE IN AN IRANIAN FAMILY WITH AUTOSOMAL RECESSIVE PRIMARY MICROCEPHALY

 
 
Author(s):  AKBARIAZAR ELINAZ, EBRAHIMPOUR MOHAMMAD, AKBARI SAEEDEH, ARZHANGHI SANAZ, ABEDINI SEYDEH SEDIGHEH, NAJMABADI HOSSEIN, KAHRIZI KIMIA*
 
* GENETICS RESEARCH CENTER, UNIVERSITY OF SOCIAL WELFARE AND REHABILITATION SCIENCES, TEHRAN, IRAN
 
Abstract: 

Objective:
Autosomal recessive primary microcephaly (MCPH) is a neurodevelopmental and genetically heterogeneous disorder with decreased head circumference due to the abnormality in fetal brain growth. To date, nine loci and nine genes responsible for the situation have been identified. Mutations in the ASPM gene (MCPH5) is the most common cause of MCPH. The ASPM gene with 28 exons is essential for normal mitotic spindle function in embryonic neuroblasts.
Materials
d Methods:
We have ascertained twenty-two consanguineous families with intellectual disability and different ethnic backgrounds from Iran. Ten out of twenty-two families showed primary microcephaly in clinical examination. We investigated MCPH5 locus using homozygosity mapping by microsatellite marker.
Result:
Sequence analysis of exon 8 revealed a deletion of nucleotide (T) in donor site of splicing site of ASPM in one family. The remaining nine families were not linked to any of the known loci .More investigation will be needed to detect the causative defect in these families.
Conlusion:
We detected a novel mutation in the donor splicing site of exon 8 of the ASPM gene. This deletion mutation can alter the ASPM transcript leading to functional impairment of the gene product.

 
Keyword(s): AUTOSOMAL RECESSIVE PRIMARY MICROCEPHALY, ASPM, MCPH5, HOMOZYGOSITY MAPPING
 
References: 
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