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An amino acid metabolic disorder that are characterized phenotypically by hyperphenylalaninemia, depletion of the neurotransmitters dopamine and serotonin, and progressive cognitive and motor deficits and that has material basis in autosomal recessive mutations in the genes encoding enzymes involved in the synthesis or regeneration of BH4.
No clinical trials have been registered for tetrahydrobiopterin (BH4)-deficient hyperphenylalaninemia.
2 publications have been identified in PubMed for tetrahydrobiopterin (BH4)-deficient hyperphenylalaninemia. Research spans Review / Meta-Analysis (50%) and Epidemiology / Natural History (50%).
Yahia S (2025). [PMID: 41318575](https://pubmed.ncbi.nlm.nih.gov/41318575/). *Sci Rep*. [Epidemiology / Natural History]
Rahman AFMT (2025). [PMID: 39858496](https://pubmed.ncbi.nlm.nih.gov/39858496/). *Biomolecules*. [Review / Meta-Analysis]
Data assembled from 2 of 12 sources · Last updated Sep 20, 2026, 3:09 AM UTC