Tumors With GNAQ Mutations: A Review With a Focus on Possible Shared Neural Crest Origins

Area of Science:

• Developmental Biology
• Genetics
• Dermatopathology

Background:

• Guanylate-binding protein Q gene (GNAQ) mutations are linked to complex pathologies with vascular and melanocytic features.
• Traditional understanding separates melanocyte (neural crest) and blood vessel (mesodermal) origins.
• Recent discoveries highlight ectomesenchyme, a neural crest derivative, contributing to trunk structures.

Purpose of the Study:

• To review GNAQ mutation-associated dermatopathology.
• To integrate these findings within the concept of ectomesenchyme.
• To explain how GNAQ mutations influence diverse pathologies and challenge traditional cell origin theories.

Main Methods:

• Review of pathological entities associated with GNAQ mutations in dermatopathology.
• Analysis of GNAQ's role in ectomesenchyme development.
• Integration of genetic findings with developmental biology principles.

Main Results:

• GNAQ mutations can lead to a spectrum of dermatological lesions.
• Neural crest cells, via ectomesenchyme, can differentiate into both melanocytic and vascular components.
• This provides a unified ontogenetic explanation for GNAQ-related pathologies.

Conclusions:

• GNAQ mutations underscore the plasticity of neural crest derivatives.
• Ectomesenchyme provides a framework for understanding shared origins of vascular and melanocytic cells.
• This challenges established distinctions between melanocytes and endothelial cells.