Abstract
Molecular analysis of the gene encoding the protein tyrosine phospatase, nonreceptor type 11 (PTPN11), identified a single base change at nucleotide 228 in an individual manifesting Noonan syndrome with aortic root widening and dysplastic aortic and mitral valves. This missense mutation changes glutamate to aspartate at position 76 of the protein (E76D or Glu76Asp), which likely disrupts intramolecular hydrogen bonding of this protein. There are few reports of aortic root dilatation in Noonan syndrome, and to our knowledge this is the first case with a confirmed PTPN11 mutation.
Similar content being viewed by others
References
Allanson JE (1987) Noonan syndrome. J Med Genet 24:9–13
Allanson JE (2003) Noonan syndrome. Gene Reviews 2003. http://www.geneclinics.org
Chen B, Bronson RT, Klaman LD, et al. (2000) Mice mutant for Egfr and Shp2 have defective cardiac semilunar valvulogenesis. Nat Genet 24:296–299
Ishizawa A, Oho S, Dodo H, Katori T, Homma SI (1996) Cardiovascular abnormalities in Noonan syndrome: the clinical findings and treatments. Acta Paediatr Jpn 38:84–90
Jamieson CR, van der Burgt I, Brady AF, et al. (1994) Mapping a gene for Noonan syndrome to the long arm of chromosome 12. Nat Genet 8:357–360
Kretschmar K, Witkowski R (1982) Dissecting aortic aneurysm in a man with symptoms of Turner’s syndrome. Z Gesamte Inn Med 37:278–281
Lin AE, Garver KL, Allanson J (1987) Aortic root dilatation in Noonan’s syndrome. N Engl J Med 317:1668–1669
Marino B, Digilio MC, Toscano A, Gianotti A, Dallapiccola B (1999) Congenital heart diseases in children with Noonan syndrome: an expanded cardiac spectrum with high prevalence of atrioventricular canal. J Pediatr 135:703–706
Morgan JM, Coupe MO, Honey M, Miller GA (1989) Aneurysms of the sinuses of Valsalva in Noonan’s syndrome. Eur Heart J 10:190–193
Musante L, Kehl HG, Majewski F, et al. (2002) Spectrum of mutations in PTPN11 and genotype–phenotype correlation in 96 patients with Noonan syndrome and five patients with cardio-facio-cutaneous syndrome. Eur J Hum Genet 11:201–206
Patton MA (1994) Noonan syndrome: a review. Growth Genetics Hormones 10:1–3
Roman MJ, Devereux RB, Kramer-Fox R, O’Loughlin J (1989) Two-dimensional echocardiographic aortic root dimensions in normal children and adults. Am J Cardiol 64:507–512
Sarkozy A, Conti E, Seripa D, et al. (2003) Correlation between PTPN11 gene mutations and congenital heart defects in Noonan and LEOPARD syndromes. J Med Genet 40:704–708
Shachter N, Perloff JK, Mulder DG (1984) Aortic dissection in Noonan’s syndrome (46 XY turner). Am J Cardiol 54:464–465
Tartaglia M, Kalidas K, Shaw A, et al. (2002) PTPN11 mutations in Noonan syndrome: molecular spectrum, genotype–phenotype correlation, and phenotypic heterogeneity. Am J Hum Genet 70:1555–1563
Tartaglia M, Mehler EL, Goldberg R, et al. (2001) Mutations in PTPN11, encoding the protein tyrosine phosphatase SHP-2, cause Noonan syndrome. Nat Genet 29:465–468
Zenker M, Buheitel G, Rauch R, et al. (2004) Genotype– phenotype correlations in Noonan syndrome. J Pediatr 144:368–374
Acknowledgments
We thank the family for their willing cooperation and are grateful to GeneDx (Gaithersburg, MD, USA) for molecular analysis.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Power, P.D., Lewin, M.B., Hannibal, M.C. et al. Aortic Root Dilatation is a Rare Complication of Noonan Syndrome. Pediatr Cardiol 27, 478–480 (2006). https://doi.org/10.1007/s00246-006-1210-x
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00246-006-1210-x