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Valproic acid-induced skeletal malformations: associated gene expression cascades.
Valentina Massa1, Robert M Cabrera, Elena Menegola
1Department of Biology, University of Milan, Milan, Italy.
Pharmacogenetics and Genomics
|October 13, 2005
Summary
Valproic acid (VPA) exposure during early development causes dose-dependent axial skeletal malformations in mice. Gene expression analysis revealed significant changes in pathways related to histone deacetylases and cell proliferation, offering insights into VPA
Area of Science:
- Developmental biology
- Teratology
- Genomics
Background:
- Valproic acid (VPA) is a common anticonvulsant with known teratogenic effects.
- VPA exposure in experimental models induces neural and skeletal defects.
- The specific molecular mechanisms underlying VPA-induced skeletal malformations require further elucidation.
Purpose of the Study:
- To investigate gene expression alterations in somitic tissue following VPA exposure.
- To identify candidate cellular pathways involved in VPA-induced axial skeletal defects.
Main Methods:
- SWV mice were treated with VPA at 8.5 days post coitum.
- Skeletal morphology was examined at 18.5 days post coitum.
- Gene expression profiling of somitic tissue was performed using cDNA microarrays at various time points post-treatment.
Main Results:
- VPA exposure resulted in dose-dependent cervical malformations, including vertebral fusions and cervical ribs.
- Significant gene expression changes were observed in ontological groups such as histone deacetylase complex, guanosine triphosphatases, cell proliferation, and cytoskeletal pathways.
- Microarray analysis identified specific genes with altered expression patterns.
Conclusions:
- The study identified candidate cellular pathways potentially responsible for VPA-induced teratogenic skeletal phenotypes.
- These findings contribute to understanding the molecular basis of VPA teratogenicity.