Retrovirus-mediated gene transfer of 6-pyruvoyl-tetrahydropterin synthase corrects tetrahydrobiopterin deficiency in fibroblasts from hyperphenylalaninemic patients. Academic Article uri icon

Overview

MeSH

  • Blotting, Western
  • Cytokines
  • Fibroblasts
  • Genes, Reporter
  • Genetic Diseases, Inborn
  • Genetic Therapy
  • Genetic Vectors
  • Humans
  • Neopterin
  • Phenylalanine
  • Transfection
  • beta-Galactosidase

MeSH Major

  • Alcohol Oxidoreductases
  • Biopterin
  • Gene Transfer Techniques
  • Phosphorus-Oxygen Lyases
  • Retroviridae

abstract

  • Tetrahydrobiopterin (BH4) deficiency, a variant form of hyperphenylalaninemia with progressive neurological dysfunction, is primarily caused by autosomal recessive mutations in the gene encoding the 6-pyruvoyl-tetrahydropterin synthase (PTPS). PTPS is a biosynthetic enzyme for the BH4 co-factor, and its deficiency is associated with a malfunction of the phenylalanine catabolism in the liver and a lack of biogenic amine neurotransmitters dopamine and serotonin in the brain. We have previously isolated the wild-type PTPS cDNA and identified several mutations responsible for a decreased enzyme in patients. This study reports the in vitro correction of BH4 deficiency by using retrovirus mediated transfer of the PTPS cDNA into primary fibroblast cultures established from different patients. The Bing packaging cell line was used for amphotropic virus production. Following PTPS gene transfer, stimulation with cytokines restored biosynthesis of BH4 in originally defective cells to values comparable to those of heterozygous fibroblasts from clinically healthy subjects. These results not only provide a direct proof that the mutations in PTPS were causative for the mutant phenotype, but they are also the first step toward gene therapy as a potential alternative approach to treat BH4 deficiency.

publication date

  • August 20, 1996

has subject area

  • Alcohol Oxidoreductases
  • Biopterin
  • Blotting, Western
  • Cytokines
  • Fibroblasts
  • Gene Transfer Techniques
  • Genes, Reporter
  • Genetic Diseases, Inborn
  • Genetic Therapy
  • Genetic Vectors
  • Humans
  • Neopterin
  • Phenylalanine
  • Phosphorus-Oxygen Lyases
  • Retroviridae
  • Transfection
  • beta-Galactosidase

Research

keywords

  • Journal Article

Identity

Language

  • eng

Digital Object Identifier (DOI)

  • 10.1089/hum.1996.7.13-1587

PubMed ID

  • 8864759

Additional Document Info

start page

  • 1587

end page

  • 1593

volume

  • 7

number

  • 13