Rare Diseases Symptoms Automatic Extraction

Pilot study to evaluate the effects of tetrahydrobiopterin on adult individuals with phenylketonuria with measurable maladaptive behaviors.

[phenylketonuria]

To evaluate the effects of tetrahydrobiopterin (BH4) on maladaptive behavior in patients with phenylketonuria (PKU).In an effort to determine if BH4 has any effects on the central nervous system, we studied 10 individuals with PKU and measurable maladaptive behaviors for 1 year. Behavioral assessments using the Vineland Adaptive Behavior Scales-Second Edition and a PKU Behavior Checklist were obtained at baseline, 6 months, and at the end of the study. Biochemical measures including plasma amino acids were obtained quarterly, and phenylalanine (Phe) and tyrosine (Tyr) were obtained monthly.Out of the 10 subjects, 2 were responders to BH4, as determined by a blood Phe reduction >30%. While blood Phe in the 8 nonresponders did not change significantly throughout the study, their Tyr levels were significantly higher at 6 months (p=0.012), but not at 12 months (p=0.23). By the end of the study, 8 subjects exhibited fewer maladaptive behaviors on the components of the Vineland Maladaptive Behavior Index, and all 10 had lower total scores on the PKU Behavior Checklist.These findings suggest that there may be direct effects of BH4 on the central nervous system, independent of lowering blood Phe.

Diseases presenting "central nervous system" symptom

  • 22q11.2 deletion syndrome
  • adrenomyeloneuropathy
  • alexander disease
  • aniridia
  • aromatase deficiency
  • canavan disease
  • child syndrome
  • classical phenylketonuria
  • congenital toxoplasmosis
  • cowden syndrome
  • cushing syndrome
  • cystinuria
  • dracunculiasis
  • erdheim-chester disease
  • fabry disease
  • gm1 gangliosidosis
  • hereditary cerebral hemorrhage with amyloidosis
  • hirschsprung disease
  • hodgkin lymphoma, classical
  • kabuki syndrome
  • kallmann syndrome
  • kindler syndrome
  • krabbe disease
  • lamellar ichthyosis
  • legionellosis
  • liposarcoma
  • malignant atrophic papulosis
  • monosomy 21
  • neonatal adrenoleukodystrophy
  • phenylketonuria
  • proteus syndrome
  • scrub typhus
  • severe combined immunodeficiency
  • sneddon syndrome
  • triple a syndrome
  • von hippel-lindau disease
  • waldenström macroglobulinemia
  • well-differentiated liposarcoma
  • wiskott-aldrich syndrome
  • wolf-hirschhorn syndrome
  • x-linked adrenoleukodystrophy
  • zellweger syndrome

You can validate or delete this automatically detected symptom