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European Journal of Pediatrics

, Volume 157, Supplement 2, pp S67–S70 | Cite as

Clinical aspects of cystathionine β-synthase deficiency: how wide is the spectrum?

  • R. De Franchis
  • M. P. Sperandeo
  • G. Sebastio
  • G. Andria
  • The Italian Collaborative Study Group on Homocystinuria

Abstract

Homocystinuria due to cystathionine β-synthase (CBS) deficiency is an autosomal recessive disease of sulphur amino acid metabolism. Major clinical manifestations include disorders of the eye, the skeleton, the central nervous system and the vascular system. A wide clinical spectrum of the disease has been reported. We discuss the role of genetic factors (e.g. different mutations of the CBS gene and a variable genetic background) and the importance of environmental factors (e.g. diet, vitamins, perinatal factors and drugs) in explaining the phenotypic variability observed in homocystinuria.

Conclusion Homocystinuria represents a good model to explain the clinical differences frequently observed among patients affected by monogenic diseases.

Key words Homocystinura Cystathionine β-synthase Clinical variability 

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • R. De Franchis
    • 1
  • M. P. Sperandeo
    • 1
  • G. Sebastio
    • 1
  • G. Andria
    • 1
  • The Italian Collaborative Study Group on Homocystinuria
  1. 1.Department of Paediatrics, Federico II University, Via S. Pansini 5, I-80131 Naples, Italy, e-mail: andria@cds.unina.It, Fax: +39 81 5463881IT

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