Neurological Disorders Associated with WWOX Germline Mutations-A Comprehensive Overview

Area of Science:

• Genetics
• Neuroscience
• Molecular Biology

Background:

• The WW domain-containing oxidoreductase (WWOX) gene is implicated in tumor suppression and increasingly linked to non-cancerous neurological disorders.
• Pathogenic germline bi-allelic WWOX variants are associated with severe conditions like autosomal recessive spinocerebellar ataxia 12 (SCAR12) and WWOX-related epileptic encephalopathy (WOREE syndrome).
• Clinical presentations are heterogeneous, often including severe epileptic encephalopathy and global developmental delay, with limited understanding of pathophysiology and genotype-phenotype correlations.

Purpose of the Study:

• To comprehensively review and consolidate all reported pathogenic variants in the WWOX gene.
• To distinguish disease-causing WWOX alleles from benign variants and assess their associated severity.
• To improve diagnostic accuracy and facilitate therapeutic strategies for WWOX-associated disorders.

Main Methods:

• Systematic literature review and data collection from databases including ClinVar, DECIPHER, VarSome, and PubMed.
• Analysis of pathogenic WWOX variants from published and unpublished sources to create the largest available dataset.
• Cross-referencing identified variants with the GnomAD database to assess population frequency and correlation with patient phenotypes.

Main Results:

• Generation of the largest published cohort of individuals with WWOX variants.
• Estimation of correlations between WWOX variant types and patient phenotypes.
• Delineation of the impact of individual WWOX variants on disease presentation.

Conclusions:

• Consolidating WWOX variant data is crucial for understanding genotype-phenotype correlations in SCAR12 and WOREE syndrome.
• This comprehensive dataset aids in distinguishing pathogenic alleles and improving diagnostic capabilities.
• Potential personalized medicine approaches can be developed based on a deeper understanding of WWOX variant impacts.