Phenylketonuria and Hyperphenylalaninemia Nutrition Study
Nutrition Status of Adult and Adolescent Patients With Classical Phenylketonuria (PKU) and Hyperphenylalaninemia
The mainstay of PKU treatment is a low-phenylalanine diet (i.e restriction of natural protein), and supplementation with a protein substitute (a mixture of amino acids free from phenylalanine, also containing micronutrients and vitamins) and special low-protein foods, to meet the patient's energy requirements. When diet and treatment is relaxed after childhood, adult and adolescent patients with phenylketonuria are at risk for malnutrition, depending on the compliance with treatment and the intake of amino acid supplements.
In this study, nutrition status of patients with PKU and hyperphenylalaninemia is systematically assessed under ongoing current treatment, in relation to Phe-tolerance, compliance with treatment, and psychosocial issues.
Study participants do not undergo any specific therapeutic or diagnostic intervention.
Studieoversikt
Status
Status
Forhold
Forhold
Intervensjon / Behandling
Intervensjon / Behandling
Studietype
Studietype
Registrering (Faktiske)
Registrering
Kontakter og plasseringer
Studiesteder
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-
-
Zurich, Sveits, CH-8032
- University Children's Hospital
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-
ZH
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Zurich, ZH, Sveits, 8091
- University Hospital Zurich, Division of Endocrinology, Diabetes and Clinical Nutrition
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Deltakelseskriterier
Kvalifikasjonskriterier
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
Tar imot friske frivillige
Kjønn som er kvalifisert for studier
Prøvetakingsmetode
Studiepopulasjon
Beskrivelse
Inclusion criteria:
- PKU (Phenylketonuria) or hyperphenylalaninemia
- male or female, minimum age 16y
- signed informed consent
Exclusion criteria:
- patient who can not comply with the study protocol (e.g. unable to fill in questionnaires by themselves or a representative)
Studieplan
Hvordan er studiet utformet?
Designdetaljer
Hva måler studien?
Primære resultatmål
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Macronutrient and micronutrient intake, calculated from a nutrition protocol (four consecutive days)
Tidsramme: assessed during 4 consecutive days max. within 1 month after a regular consultation in the outpatient clinic
|
Assessed nutrients: Macronutrients: protein, fat, carbohydrates in g/kg/d Daily phenylalanine and tyrosine intake Micronutrients and minerals: Calcium, magnesium, iron, zinc, selenium Vitamins: D, B12, B6, C, folic acid |
assessed during 4 consecutive days max. within 1 month after a regular consultation in the outpatient clinic
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Phenylalanine level (umol/l)
Tidsramme: assessed at the end of the four-day nutrition protocol (see primary outcome)
|
this outcome measure is not study-specific and is collected as part of established routine care (self-measurement by patient)
|
assessed at the end of the four-day nutrition protocol (see primary outcome)
|
|
Plasma amino acid profile
Tidsramme: determined at a routine visit at the outpatient clinic, on average 1x per year
|
this outcome measure is not study-specific and is collected as part of established routine care.
|
determined at a routine visit at the outpatient clinic, on average 1x per year
|
|
Concentrations of micronutrients, minerals and vitamins
Tidsramme: determined at a routine visit at the outpatient clinic, on average 1x per year
|
assessed parameters: Ferritin, zinc, selenium, vitamin D, vitamin B12, folic acid. These outcome measures are not study-specific and are collected as part of established routine care |
determined at a routine visit at the outpatient clinic, on average 1x per year
|
|
body weight (kg)
Tidsramme: determined at a routine visit at the outpatient clinic, on average once every 6 - 12 months
|
assessed as part of routine clinical care
|
determined at a routine visit at the outpatient clinic, on average once every 6 - 12 months
|
Samarbeidspartnere og etterforskere
Sponsor
Sponsor
Etterforskere
Etterforskere
- Hovedetterforsker: Michel Hochuli, MD PhD, University Hospital Zurich, Division of Endocrinology, Diabetes and Clinical Nutrition
Studierekorddatoer
Studer hoveddatoer
Studiestart
Studiestart
Primær fullføring (Faktiske)
Primær fullføring
Studiet fullført (Faktiske)
Studiet fullført
Datoer for studieregistrering
Først innsendt
Først innsendt
Først innsendt som oppfylte QC-kriteriene
Først innsendt som oppfylte QC-kriteriene
Først lagt ut (Anslag)
Først lagt ut
Oppdateringer av studieposter
Sist oppdatering lagt ut (Anslag)
Sist oppdatering lagt ut
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Sist bekreftet
Sist bekreftet
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
Andre studie-ID-numre
- KEK-ZH-Nr. 2013-0120
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