Annals of nutrition & metabolism · 2019
The Association of Therapy Adherence and Thyroid Function in Adult Patients with Phenylketonuria.
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Sumanszki Csaba, Kiss Erika, Simon Erika, Galgoczi Erika, Soos Aron, Patocs Attila, Kovacs Bela, Nagy Endre V, Reismann Peter
Аннотация
BACKGROUND: The standard, lifelong therapy of phenylketonuria (PKU) is a natural protein-restricted diet complemented with phenylalanine (Phe)-free L-amino acid mixtures that provide the daily necessary micronutrients.
OBJECTIVE: To assess thyroid function and structure and the iodine status of early-treated adult PKU (ETPKU) patients in Hungary.
METHODS: Sixty-nine PKU patients (aged 18-41 years) and 50 healthy controls were enrolled in the study. Thyroid hormones, serum thyroglobulin, thyroid antibodies, urinary iodine, and selenium concentrations were measured, and thyroid ultrasound was performed.
RESULTS: The incidence of thyroid dysfunction was infrequent (n = 2). Blood Phe was negatively correlated with thyroid-stimulating hormone (TSH), and PKU patients had higher free thyroxine and lower TSH levels than healthy controls. Although optimal iodine status was found in the entire PKU population, by dividing the patients according to their therapy compliance, we observed that lower therapy adherence was associated with mild iodine deficiency and lower urinary selenium levels.
CONCLUSIONS: The results of this study suggest that iodine status is strongly influenced by the adherence to therapy in ETPKU patients. No or not enough medical food consumption combined with a low-Phe diet can lead to subclinical iodine deficiency.
OBJECTIVE: To assess thyroid function and structure and the iodine status of early-treated adult PKU (ETPKU) patients in Hungary.
METHODS: Sixty-nine PKU patients (aged 18-41 years) and 50 healthy controls were enrolled in the study. Thyroid hormones, serum thyroglobulin, thyroid antibodies, urinary iodine, and selenium concentrations were measured, and thyroid ultrasound was performed.
RESULTS: The incidence of thyroid dysfunction was infrequent (n = 2). Blood Phe was negatively correlated with thyroid-stimulating hormone (TSH), and PKU patients had higher free thyroxine and lower TSH levels than healthy controls. Although optimal iodine status was found in the entire PKU population, by dividing the patients according to their therapy compliance, we observed that lower therapy adherence was associated with mild iodine deficiency and lower urinary selenium levels.
CONCLUSIONS: The results of this study suggest that iodine status is strongly influenced by the adherence to therapy in ETPKU patients. No or not enough medical food consumption combined with a low-Phe diet can lead to subclinical iodine deficiency.