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Published on: September 19, 2015
The presence and distribution of various genes in postnatal CLP-affected palatine tissue
1Institute of Anatomy and Anthropology, Riga Stradins University, Riga, LV-1010, Latvia. 038936@rsu.edu.lv.
Insights
Cleft lip and palate (CL/P) gene expression differs in affected tissue, with PAX7 significantly impacting epithelial and connective tissue changes. Other genes like PAX9, WNT3A, WNT9B, SOX3, and SHH show varied roles in this common birth defect.
Area of Science:
- Genetics and Developmental Biology
- Craniofacial Development
- Birth Defects Research
Background:
- Cleft lip with or without a cleft palate (CL/P) is the most prevalent craniofacial birth defect globally.
- CL/P is associated with cosmetic changes, comorbidities, and high treatment costs.
- Understanding CL/P pathogenesis is crucial for prevention, treatment, genetic counseling, and improving patient quality of life.
Purpose of the Study:
- To investigate the expression patterns of six key genes (PAX7, PAX9, SHH, SOX3, WNT3A, WNT9B) in postnatal CL/P-affected palatine tissue.
- To compare the distribution of these genes within the affected tissue samples.
Main Methods:
- Chromogenic in situ hybridization (CISH) was employed.
- Detection of PAX7, PAX9, SHH, SOX3, WNT3A, and WNT9B genes in palatine tissue from individuals with CL/P.
- Analysis of gene distribution and correlations within the tissue.
Main Results:
- Statistically significant differences in the distribution of PAX7, PAX9, WNT3A, and WNT9B were identified.
- Nineteen pairs of moderate to very strong positive correlations were observed among the studied genes.
- PAX7 showed a notable association with changes in cleft-affected palatine epithelium and connective tissue.
Conclusions:
- PAX7 appears to be a primary driver of changes in cleft-affected palatine epithelium and connective tissue.
- PAX9, WNT3A, WNT9B, and SOX3 have a more limited role, while SHH acts individually.
- The numerous positive correlations highlight the complex interplay of genetic pathways in orofacial cleft morphogenesis.
Background:
Worldwide cleft lip with or without a cleft palate (CL/P) is the most common craniofacial birth defect. Apart from changes in facial appearance, additionally affected individuals often suffer from various associated comorbidities requiring complex multidisciplinary treatment with overall high expenses. Understanding the complete pathogenetic mechanisms of CL/P might aid in developing new preventative strategies and therapeutic approaches, help with genetic counselling, and improve quality of life. Many genes have been associated with the development of orofacial clefts; however, the majority require further research. Based on the role of PAX7, PAX9, SHH, SOX3, WNT3A, and WNT9B in orofacial development, the intention was to use chromogenic in situ hybridization to detect the six genes in postnatal CLP-affected palatine tissue and compare their distribution within the tissue samples.
Results:
Statistically significant differences in the distribution of PAX7, PAX9, WNT3A, and WNT9B were observed. In total, 19 pairs of moderate to very strong positive correlations were noted.
Conclusions:
Changes in the cleft-affected palatine epithelium primarily seem to be associated with the PAX7 gene; however, PAX9, WNT3A, WNT9B, and SOX3 role seems to be more limited. Whilst connective tissue changes seem to depend on PAX7 only, SHH seems to participate individually and indistinctly. Numerous positive correlations reflect the complicating interactions of the pathways and their components in the orofacial cleft morphopathogenesis.
