- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT02212288
Antioxidant Signature in Adult Patients With Phenylketonuria (StressOX-PCU)
Antioxidant Signature in Adult Patients With Phenylketonuria (PKU) and Healthy Volunteers : Relationship With Metabolic Disturbances
Studieoversigt
Status
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
Analysis of oxidative stress
Oxidative metabolism is most likely disrupted leukocytes in the PCU thereof having DNA breaks correlated to blood Phe levels (22). Accessibility by patients, these cells are therefore interesting "tools" for analysis of oxidative stress in PKU.
-Hydrogen Peroxide intraleucocytaire We will isolate the leukocytes from heparinized samples to analyze intracellular H2O2 levels by flow cytometry after labeling with 5-(and 6)-chloromethyl-2 ', 7'-dicholorohydrofluorescein diacetate, acetyl ester (CM-H2DCFDA).
Anti-oxydogramme We will carry out an anti-oxydogramme which was the subject of a patent (Herault O & Vignon C "Method for Cancer Diagnosis" - Patent PCT / EP2011 / 073,757 filed Dec. 22, 2011) in the field of oncology. This is to achieve expression of an anti-oxidant genes in PKU profile compared with control subjects. This approach is based on three techniques: determining the level of expression of key antioxidants by RT-qPCR gene comparison with the expression of a housekeeping gene (GAPDH), ranked by their level of gene expression and comparison with the level of expression of the same genes in a reference pool RNA, used as internal calibrator. We will express these results through the RQ (relative quantification). The panel of antioxidant genes studied is the following: genes antioxidant enzyme systems not thiols: superoxide dismutase (SOD1, SOD2, SOD3) and catalase (CAT) or thiols: glutathione system (GPX, GPX1, GPX2, GPX3, GPX4, GPX5, GPX6, GPX7 GSR), the thioredoxin (TXN, TXN2) of peroxyredoxins (PRDX, PRDX2, PRDX4, PRDX5, PRDX6) and glutaredoxins (GLRX, GLRX2, GLRX3, GLRX5).
- Way NRF2 The NRF2 pathway H2O2 / being very classically activated when oxidative stress, we will quantify the expression of target genes NRF2 (HMOX, NQO1, GPX2). If they are overexpressed, the nuclear translocation of NRF2 be studied by confocal microscopy.
- DNA Breaks The breaks in DNA related to the oxidative stress in leukocytes are analyzed by flow cytometry (marking -H2AX) and electrophoretic migration of the fluorescent DNA (COMET assay).
- antioxidant vitamins and trace elements We will measure the plasma concentrations of vitamin A, C and E by a technique of liquid chromatography with UV detection. Furthermore, the activity of many enzymes is dependent antioxidant micronutrient, we doserons plasma concentrations of Se, Cu, Mn, and Zn.
Metabolic Balance
We realize chromatography plasma amino acids using the standard method of ion exchange chromatography with post-column derivation with ninhydrin. We will evaluate in particular the concentration of phenylalanine and tyrosine. We will focus on also other amino acids as described antioxidant potential (citrulline, taurine, histidine ...) We will evaluate by GC-MS organic acids commonly accumulated in the urine of PKU patients: dihydroxyphenylalanine, phenyllactate, phenylpyruvate, phenylacetate. Bioptérines concentrations and its derivatives will also be evaluated in HPLC with fluorescence detection.
Undersøgelsestype
Tilmelding (Faktiske)
Kontakter og lokationer
Studiesteder
-
-
I&L
-
Tours, I&L, Frankrig, 37044
- University Hospital of Tours
-
-
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
Inclusion Criteria:
- PKU patients over 18 years of age with phenylketonuria not treated with a phenylalanine-controlled diet.
- Affiliation to a social security scheme
- Reading and signing the informed consent
- Control subjects: all healthy subjects over 18 years of unfulfilled abnormal metabolism of whatever nature and associated symptoms
Exclusion Criteria:
- Pregnancy of patients and control subjects women (confirmed by a negative pregnancy test)
- Patients with diseases that may cause oxidative stress (neurodegenerative diseases, cancer)
- Patients treated with drugs known to cause oxidative stress
- Control subjects:controlled protein diet
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Kohorter og interventioner
Gruppe / kohorte |
Intervention / Behandling |
---|---|
PKU patients
Adult PKU patients;Blood samples;Urine sample only at inclusion
|
Blood samples are for metabolic and genetic and biological investigation
Urine sample for biological investigation
|
Healthy controls
Adult Healthy controls;Blood samples;Urine samples only at inclusion
|
Blood samples are for metabolic and genetic and biological investigation
Urine sample for biological investigation
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
---|---|---|
Plasma concentrations of oxidative stress markers
Tidsramme: First Day
|
The main purpose of this preliminary study is to characterize oxidative stress in patients with PKU adults through a comprehensive approach involving the assessment of a wide combination of characteristic markers of oxidative stress and metabolic parameters that may be involved. In this context, we propose to establish an anti-oxidant signing in adult patients PCU using an innovative and comprehensive technical involving
|
First Day
|
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
---|---|---|
Plasma concentrations of amino acids and organic acids concentration
Tidsramme: First day
|
Measurement of concentration of amino acids and organic acids concentration found in the 2 groups in comparison to normal values
|
First day
|
Samarbejdspartnere og efterforskere
Sponsor
Samarbejdspartnere
Efterforskere
- Studieleder: François MAILLOT, MD-PhD, University Hospital of TOURS, France
Datoer for undersøgelser
Studer store datoer
Studiestart
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- PHAO14/FM-StressOX-PCU
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .
Kliniske forsøg med PKU
-
Nutricia ResearchAfsluttetPKUDet Forenede Kongerige
-
University of GuelphMcMaster University; Laval UniversityIkke rekrutterer endnuAutosomal recessiv lidelse (genetiske bærere af PKU)Canada
-
University of GuelphMcMaster UniversityRekrutteringAutosomal recessiv lidelse (genetiske bærere af PKU)Canada
-
BioMarin PharmaceuticalRekrutteringFenylketonuri (PKU)Forenede Stater
-
Nutricia UK LtdAfsluttetPKU | TyrosinæmiDet Forenede Kongerige
-
University of Southern CaliforniaBioMarin PharmaceuticalAfsluttet
-
Vitaflo International, LtdBirmingham Women's and Children's NHS Foundation TrustRekruttering
-
BioMarin PharmaceuticalRekrutteringFenylketonuri (PKU)Forenede Stater, Tyskland, Italien
-
Homology Medicines, IncAfsluttet
Kliniske forsøg med Blood sample
-
Hillel Yaffe Medical CenterUkendt
-
University of Colorado, DenverRekrutteringEnkelt-ventrikel | Abnormitet i pulmonal vaskulær modstand | Metabolomics | Superior Cavo-pulmonal anastomose | EndotelinForenede Stater
-
ExThera Medical Europe BVExThera Medical Corporation; Vivantes Clinic NeuköllnRekrutteringBlodbaneinfektionFrankrig, Tyskland, Holland, Østrig, Belgien, Italien, Polen, Spanien, Det Forenede Kongerige
-
Ascensia Diabetes CareAfsluttet
-
Ascensia Diabetes CareAfsluttetDiabetesForenede Stater
-
University of British ColumbiaIkke rekrutterer endnuForhøjet blodtryk
-
Stanford UniversityRekrutteringKarsygdomme | Slag | Forhøjet blodtryk | TIAForenede Stater
-
Ascensia Diabetes CareAfsluttetDiabetesForenede Stater
-
University of the Balearic IslandsAfsluttetBlodtryk | ModstandstræningSpanien
-
Helios Klinik Gotha/OhrdrufHelios Klinikum ErfurtIkke rekrutterer endnu