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Mutations in TWIST, a basic helix-loop-helix transcription factor, in Saethre-Chotzen syndrome
T D Howard1, W A Paznekas, E D Green
1Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, Maryland 21287-3914, USA.
Nature Genetics
|January 1, 1997
Summary
Saethre-Chotzen syndrome, a craniosynostosis disorder, is linked to mutations in the TWIST gene. This gene is crucial for craniofacial and limb development, potentially regulating fibroblast growth factor receptors.
Area of Science:
- Genetics
- Developmental Biology
- Molecular Biology
Background:
- Saethre-Chotzen syndrome is a common autosomal dominant craniosynostosis disorder.
- It presents with craniofacial and limb anomalies, with the genetic locus mapped to chromosome 7p21-p22.
Purpose of the Study:
- To investigate the TWIST gene as a candidate for Saethre-Chotzen syndrome.
- To identify mutations within the TWIST gene in affected patients.
Main Methods:
- Mapping the TWIST gene to human chromosome 7p21-p22.
- Performing mutational analysis on patient DNA to detect genetic alterations.
- Utilizing Drosophila models to study gene function and interactions.
Main Results:
- TWIST was mapped to the critical region 7p21-p22.
- Various mutations (nonsense, missense, insertion, deletion) were identified in the TWIST gene of patients.
- Drosophila studies suggest TWIST may regulate fibroblast growth factor receptors (FGFRs).
Conclusions:
- Mutations in the TWIST gene are associated with Saethre-Chotzen syndrome.
- TWIST is a key player in craniofacial and limb development.
- TWIST may act as an upstream regulator of FGFRs in developmental pathways.