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The RASopathies: developmental syndromes of Ras/MAPK pathway dysregulation

William E Tidyman1, Katherine A Rauen

  • 1Department of Pediatrics, Division of Medical Genetics, University of California, San Francisco, CA 94115, USA. William.tidyman@ucsf.edu

Current Opinion in Genetics & Development
|May 27, 2009
PubMed

Insights

RASopathies are developmental syndromes caused by mutations in the Ras/mitogen-activated protein kinase (MAPK) pathway, leading to overlapping features like facial differences and developmental delays. This review covers their clinical aspects and molecular underpinnings.

Area of Science:

  • Genetics
  • Developmental Biology
  • Molecular Biology

Background:

  • The Ras/mitogen-activated protein kinase (MAPK) pathway regulates crucial cellular processes including cell cycle, differentiation, and senescence.
  • Dysregulation of the Ras/MAPK pathway significantly impacts development.
  • RASopathies are a class of developmental syndromes arising from germline mutations in genes encoding Ras/MAPK pathway components.

Purpose of the Study:

  • To review the clinical features of RASopathies.
  • To elucidate the underlying molecular basis of these syndromes.
  • To highlight the overlapping and distinct phenotypic manifestations.

Main Methods:

  • Review of clinical data and genetic studies related to RASopathies.
  • Analysis of molecular mechanisms driving Ras/MAPK pathway dysregulation.
  • Synthesis of information on syndrome-specific and shared phenotypic characteristics.

Main Results:

  • Germline mutations in Ras/MAPK pathway genes cause RASopathies, typically increasing pathway signaling.
  • Syndromes share common features such as characteristic facial features, cardiac defects, neurocognitive delay, and increased cancer predisposition.
  • Individual RASopathies present unique clinical profiles despite shared pathway dysregulation.

Conclusions:

  • RASopathies represent a spectrum of developmental disorders linked to aberrant Ras/MAPK signaling.
  • Understanding the molecular basis is key to diagnosing and managing these complex syndromes.
  • Further research can improve therapeutic strategies for patients with RASopathies.

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