Date: 19 Dec 2012
Ras/MAPK syndromes and childhood hemato-oncological diseases
Noonan syndrome (NS) is an autosomal-dominant disease characterized by distinctive facial features, webbed neck, cardiac anomalies, short stature and cryptorchidism. NS exhibits phenotypic overlap with Costello syndrome and cardio-facio-cutaneous (CFC) syndrome. Germline mutations of genes encoding proteins in the RAS/mitogen-activated protein kinase (MAPK) pathway cause NS and related disorders. Germline mutations in PTPN11, KRAS, SOS1, RAF1, and NRAS have been identified in 60–80 % of NS patients. Germline mutations in HRAS have been identified in patients with Costello syndrome and mutations in KRAS, BRAF, and MAP2K1/2 (MEK1/2) have been identified in patients with CFC syndrome. Recently, mutations in SHOC2 and CBL have been identified in patients with Noonan-like syndrome. It has been suggested that these syndromes be comprehensively termed RAS/MAPK syndromes, or RASopathies. Molecular analysis is beneficial for the confirmation of clinical diagnoses and follow-up with patients using a tumor-screening protocol, as patients with NS and related disorders have an increased risk of developing tumors. In this review, we summarize the genetic mutations, clinical manifestations, associations with malignant tumors, and possible therapeutic approaches for these disorders.
Costello J. A new syndrome. N Z Med J. 1971;74:397.
Costello JM. A new syndrome: mental subnormality and nasal papillomata. Aust Paediatr J. 1977;13:114–8.PubMed
Takai Y, Sasaki T, Matozaki T. Small GTP-binding proteins. Physiol Rev. 2001;81:153–208.PubMed
Denayer E, Peeters H, Sevenants L, Derbent M, Fryns JP, Legius E. NRAS mutations in Noonan syndrome. Mol Syndromol. 2012;3:34–8.PubMed
Denayer E, Devriendt K, de Ravel T, Van Buggenhout G, Smeets E, Francois I, et al. Tumor spectrum in children with Noonan syndrome and SOS1 or RAF1 mutations. Genes Chromosomes Cancer. 2010;49:242–52.PubMed
Schuhmacher AJ, Guerra C, Sauzeau V, Canamero M, Bustelo XR, Barbacid M. A mouse model for Costello syndrome reveals an Ang II-mediated hypertensive condition. J Clin Invest. 2008;118:2169–79.PubMed
Takagi M, Shinoda K, Piao J, Mitsuiki N, Matsuda K, Muramatsu H, et al. Autoimmune lymphoproliferative syndrome-like disease with somatic KRAS mutation. Blood. 2011;117:2887–90.
- Ras/MAPK syndromes and childhood hemato-oncological diseases
International Journal of Hematology
Volume 97, Issue 1 , pp 30-36
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