RASopathies.

Area of Science:

• Genetics and Molecular Biology
• Developmental Biology
• Oncology

Background:

• RASopathies are a spectrum of genetic disorders caused by mutations in the RAS-MAPK signaling pathway.
• This pathway is crucial for fundamental cellular processes including differentiation, proliferation, and survival.
• Germline and mosaic mutations lead to diverse clinical presentations, ranging from distinct syndromes to localized or widespread lesions.

Purpose of the Study:

• To provide a comprehensive review of RASopathies.
• To discuss the heterogeneous clinical manifestations associated with RAS mutations.
• To explore emerging targeted therapies and identify areas requiring further research.

Main Methods:

• Literature review of genetic mutations in the RAS-MAPK pathway.
• Analysis of clinical presentations of germline and mosaic RASopathies.
• Synthesis of current research on targeted therapies and unresolved questions.

Main Results:

• RASopathies encompass syndromes like Noonan syndrome, Costello syndrome, and neurofibromatosis type 1.
• Mosaic forms can manifest as epidermal nevi, nevus sebaceous, or encephalocraniocutaneous lipomatosis.
• The review highlights the broad spectrum of clinical variability and the critical role of RAS-MAPK signaling.

Conclusions:

• RASopathies present a wide range of clinical phenotypes due to RAS-MAPK pathway dysregulation.
• Targeted therapies are emerging, offering new hope for patients.
• Further research is essential to address uncertainties, particularly regarding carcinogenesis risk and optimal screening protocols.