Abstract
Correlation of the response to a load of tetrahydrobiopterin (BH4) in dihydropterin reductase (DHPR) deficient patients to the type of mutation in these patients has led to the conclusion that 4 patients without mutant DHPR molecules in their cells respond to the BH4 load, whereas 3 patients with mutant DHPR in their cells do not respond. Intravenous injection of BH4 in 1 of the cases not responding to BH4 again showed no response.
Similar content being viewed by others
References
Arai, N., Narisawa, K., Hayakawa, M. and Tada, K. Hyperphenylalaninemia due to dihydropteridine reductase deficiency: diagnosis by enzyme assays on dried blood spots.Pediatrics 70 (1982) 426–430
Curtius, H., Niederwieser, R., Viscontini, M., Otten, A.et al. Atypical phenylketonuria due to tetrahydrobiopterin deficiency, diagnosis and treatment with tetrahydrobiopterin, dihydrobiopterin and sepiapterin.Clin. Chim. Acta 93 (1979) 251–262
Danks, D. M., Cotton, R. G. H. and Schlesinger, P. Tetrahydrobiopterin treatment of variant forms of phenylketonuria.Lancet 2 (1975) 1043
Danks, D. M., Schlesinger, P., Firgaira, F., Cotton, R. G. H., Watson, B. M., Rembold, H. and Hennings, G. Malignant hyperphenylalaninaemia — clinical features, biochemical findings and experience with administration of biopterins.Pediatr. Res. 13 (1979) 1150–1155
Firgaira, F. A., Choo, K. H., Cotton, R. G. H. and Danks, D. M. Molecular and immunological comparison of human dihydropteridine reductase in liver, cultured fibroblasts and continuous lymphoid cells.Biochem. J. 197 (1981a) 45–53
Firgaira, F. A., Choo, K. H., Cotton, R. G. H. and Danks, D. M. Heterogeneity in the molecular defect in human dihydropteridine reductase deficiency.Biochem. J. 198 (1981b) 677–682
Firgaira, F. A., Cotton, R. G. H. and Danks, D. M. Human dihydropteridine reductase. A method for the measurement of activity in cultured cells and its application to malignant hyperphenylalaninaemia.Clin. Chim. Acta 95 (1979) 47–59
Firgaira, F. A., Cotton, R. G. H. and Danks, D. M. Human dihydropteridine reductase deficiency. Demonstration of DHPR− CRM+ and DHPR− CRM− mutants. In Blair, J. A. (ed.)Chemistry and Biology of Pteridines, Walter de Gruyter and Co, Berlin, 1983, pp. 771–775
Laemli, V. K. Cleavage of structural proteins during the assembly of the head of bacteriophage T4.Nature 227 (1970) 680–685
Lipson, A., Yu, J., O'Halloran, M., Potter, M. and Wilken, B. Dihydropteridine reductase deficiency: non-response to oral tetrahydrobiopterin in load test.J. Inher. Metab. Dis. 7 (1984) 69–71
Niederwieser, A., Matasovic, A., Staudenmann, W., Wang, M. and Curtius, H. Screening for tetrahydrobiopterin deficiency.Biochem. Clin. Asp. Pteridines 1 (1982) 293–306
Nielsen, K. H., Simonsen, W. and Lind, B. E. Dihydropteridine reductase: a method for the measurement of activity and investigation of the specificity for NADH and NADPH.Eur. J. Biochem. 9 (1969) 497–502
Rey, F., Harpey, J.-P., Leeming, R. J., Aicardi, J. and Rey, J. Les hyperphenylalaninemies avec activité normale de la phenylalanine hydroxylase.Arch. Franc. Ped. 34 (1977) 109–120
Smith, I., Hyland, K., Kendall, B. and Leeming, R. Clinical role of pteridine therapy in tetrahydrobiopterin deficiency.J. Inher. Metab. Dis. 8 Suppl. 1 (1985) 39–45
Tada, K., Yoshida, T., Mochizuki, K., Konno, T., Nakagawa, H., Yokoyama, Y., Takada, G. and Arakawa, T. Two siblings of hyperphenylalaninemia: suggestion to a genetic variant of phenylketonuria.Tohoku J. Exp. Med. 100 (1969) 249–253
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cotton, R.G.H., Jennings, I., Bracco, G. et al. Tetrahydrobiopterin non-responsiveness in dihydropteridine reductase deficiency is associated with the presence of mutant protein. J Inherit Metab Dis 9, 239–243 (1986). https://doi.org/10.1007/BF01799654
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01799654