Decoding the Role of DVL1 in Intracranial Meningioma

Area of Science:

• Neuro-oncology
• Molecular biology
• Genetics

Background:

• The Wnt signaling pathway is implicated in meningioma progression.
• The precise role of DVL1, a key Wnt mediator, in meningioma remains unclear.
• Investigating DVL1's PDZ domain is crucial for understanding its interactions and function.

Purpose of the Study:

• To investigate the impact of DVL1 gene alterations on human intracranial meningioma progression.
• To analyze genetic alterations within the DVL1 PDZ domain.
• To assess the correlation between DVL1 expression and meningioma characteristics.

Main Methods:

• Genetic analysis for microsatellite instability and loss of heterozygosity.
• Sequencing of the DVL1 PDZ gene region to identify mutations.
• Immunohistochemistry to evaluate DVL1 and active β-catenin expression.

Main Results:

• Microsatellite instability (9.09%) and loss of heterozygosity (6.06%) were observed.
• Repetitive deletions and duplications in the DVL1 PDZ gene region were identified.
• Nuclear DVL1 expression significantly correlated with higher active β-catenin levels (p=0.029) and increased meningioma grade (p=0.030).

Conclusions:

• DVL1 gene alterations influence meningioma progression.
• Nuclear DVL1 expression serves as a potential biomarker for meningioma progression.
• DVL1 expression indicates Wnt signaling pathway activation in meningiomas.