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Rare Dis. 2015 May 22;3(1):e1045169. doi: 10.1080/21675511.2015.1045169. eCollection 2015.

The impact of the genetic background in the Noonan syndrome phenotype induced by K-Ras(V14I).

Rare diseases (Austin, Tex.)

Isabel Hernández-Porras, Beatriz Jiménez-Catalán, Alberto J Schuhmacher, Carmen Guerra

Affiliations

  1. Molecular Oncology; Centro Nacional de Investigaciones Oncológicas (CNIO) ; Madrid, Spain.

PMID: 26458870 PMCID: PMC4590006 DOI: 10.1080/21675511.2015.1045169

Abstract

Noonan syndrome (NS) is an autosomal dominant genetic disorder characterized by short stature, craniofacial dysmorphism, and congenital heart defects. A significant fraction of NS-patients also develop myeloproliferative disorders. The penetrance of these defects varies considerably among patients. In this study, we have examined the effect of 2 genetic backgrounds (C57BL/6J.OlaHsd and 129S2/SvPasCrl) on the phenotypes displayed by a mouse model of NS induced by germline expression of the mutated K-Ras (V14I) allele, one of the most frequent NS-KRAS mutations. Our results suggest the presence of genetic modifiers associated to the genetic background that are essential for heart development and function at early stages of postnatal life as well as in the severity of the haematopoietic alterations.

Keywords: Noonan Syndrome; Ras oncogenes; Rasopathies; developmental disorders; genetic backgrounds; genotype-phenotype correlation; modifiers; mouse models

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