What's new in neurogenetics? Focus on "primary microcephaly"
1Clinical Genetics Service, City Hospital, Nottingham NG5 1PB, UK.
Summary
Primary microcephaly, an autosomal recessive condition, is linked to specific genes. Researchers have identified the Microcephalin and ASPM genes at the MCPH1 and MCPH5 loci, respectively, advancing our understanding of this inherited disorder.
Area of Science:
- Genetics
- Developmental Biology
- Neurology
Background:
- Primary microcephaly is a rare inherited neurodevelopmental disorder characterized by a significantly smaller head circumference.
- It follows an autosomal recessive inheritance pattern, meaning two copies of the altered gene are needed for the condition to manifest.
- Genetic heterogeneity is observed, with multiple chromosomal locations (loci) associated with the disorder.
Purpose of the Study:
- To review the current understanding of the genetic basis of primary microcephaly.
- To highlight the recent identification of specific genes responsible for primary microcephaly at mapped loci.
Main Methods:
- Literature review of genetic studies on primary microcephaly.
- Analysis of mapped loci and identified causative genes.
Main Results:
- Six loci have been mapped for primary microcephaly to date.
- Genes at two loci, MCPH1 and MCPH5, have been recently identified.
- The Microcephalin gene is located at the MCPH1 locus.
- The ASPM gene is located at the MCPH5 locus.
Conclusions:
- The identification of Microcephalin and ASPM genes represents significant progress in understanding the molecular mechanisms underlying primary microcephaly.
- Further research into these genes will likely elucidate their roles in brain development and the pathogenesis of microcephaly.
