Genetic and Pathogenetic Aspects of Noonan Syndrome and Related DisordersZenker M.
Institute of Human Genetics, University Hospital Erlangen, University of Erlangen-Nuremberg, Erlangen, and Institute of Human Genetics, University Hospital Magdeburg, Otto-von-Guericke University, Magdeburg, Germany
Noonan syndrome (NS) and the clinically overlapping disorders cardio-facio-cutaneous syndrome, LEOPARD syndrome, Costello syndrome and Neurofibromatosis-Noonan syndrome share the clinical features of short stature, the same spectrum of congenital heart defects, and a similar pattern of craniofacial anomalies. It is now known that all these disorders are caused by mutations in components of the RAS-MAPK signaling pathway. This pathway was previously known for its involvement in tumorigenesis. This article reviews the current knowledge on underlying genetic alterations and possible pathogenetic mechanisms responsible for NS and related disorders. It discusses the relationship between a group of developmental disorders and oncogenes. Potential future treatment prospects are based on the possibility of inhibiting RAS-MAPK signaling by pharmaceuticals.
After acceptance of this paper for publication, a specific mutation of SHOC2, which encodes a modulator of RAS-MAPK signaling, was reported to cause a clinically relatively homogeneous variant of NS named Noonan-like syndrome with loose anagen hair [Cordeddu et al., Nat Genet 2009;41(9):1022–1026].
Institute of Human Genetics, University Hospital Magdeburg, Leipziger Str. 44
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Published online: December 22, 2009
Number of Print Pages : 7
Number of Figures : 2, Number of Tables : 0, Number of References : 46
Hormone Research (From Developmental Endocrinology to Clinical Research)
Vol. 72, No. Suppl. 2, Year 2009 (Cover Date: December 2009)
Journal Editor: Czernichow P. (Paris)
ISSN: 0301-0163 (Print), eISSN: 1423-0046 (Online)
For additional information: http://www.karger.com/HRE