Noninvasive measurement of phenylalanine by iontophoretic extraction in patients with phenylketonuria.
J Inherit Metab Dis
; 30(6): 910-5, 2007 Nov.
Article
en En
| MEDLINE
| ID: mdl-17912613
ABSTRACT
Phenylketonuria is an autosomal recessive disorder characterized by elevated concentrations of phenylalanine. Elevated phenylalanine concentrations can impair intellectual functions and the disease is treated with a lifelong diet and frequent monitoring of plasma phenylalanine concentrations. Previous in vitro studies have demonstrated the feasibility of iontophoretically enhanced transdermal transport of phenylalanine. Here we evaluate the feasibility of transdermal iontophoretic extraction of phenylalanine in vivo. Phenylalanine was iontophoretically extracted from the skin of healthy volunteers and of patients with phenylketonuria for up to 6 h and concentrations were compared with those measured in plasma. The amount of phenylalanine iontophoretically extracted from the skin declined over time, suggesting contribution of phenylalanine from the skin in the initial extraction. Phenylalanine iontophoretically extracted from skin correlated with plasma phenylalanine levels at plasma levels above 300 micromol/L. This correlation supports the feasibility of iontophoretic phenylalanine extraction for monitoring phenylketonuria.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Fenilalanina
/
Fenilcetonurias
/
Iontoforesis
Tipo de estudio:
Observational_studies
Límite:
Humans
Idioma:
En
Revista:
J Inherit Metab Dis
Año:
2007
Tipo del documento:
Article
País de afiliación:
Estados Unidos