Phosphorylation of ERK1/2 in Patients With Parkinson's Disease (BIODYS (1))
A Descriptive Study of Lymphocytic Phosphorylation of ERK1/2 in Patients With Parkinson's Disease With Dyskinesias and in Controls
Levodopa-induced dyskinesia severely limits the use of levodopa in Parkinson's disease and constitutes a debilitating complication of dopaminergic treatment in late stage. Among several neurobiological mechanisms identified so far, the investigators have established in experimental models the key role of D1 receptor hypersensitivity and a"Ras-ERK" signalling pathway. As the very same dopamine receptor machinery and the Ras-ERK pathway are present in blood lymphocytes, the investigators wish to test the hypothesis that the level of ERK phosphorylation in lymphocytes is a biomarker of levodopa-induced dyskinesia in Parkinson's Disease.
The study will be performed in dyskinetic levodopa-treated patients and non-Parkinson's Disease controls. Blood sampling "off" and "on" levodopa treatment (1 hour post-dose), as well as clinical data collection will be done during a scheduled pre-op work-up (deep brain stimulation). Subsequently, suspended lymphocytes from blood samples will be immunolabelled using an anti-pERK antibody and mean fluorescence intensity and percent of labelled lymphocytes will be assessed by flow cytometry. Additionally, plasma and urine samples will be collected "on" et "off" for dosage of dopamine. The motor effect of levodopa will be assessed through UPRSIII rating scale and eye movement (saccades) speed by non-invasive oculometric recordings.
Studieoversigt
Status
Betingelser
Intervention / Behandling
Undersøgelsestype
Tilmelding (Faktiske)
Kontakter og lokationer
Studiesteder
-
-
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Pessac, Frankrig, 33604
- CHU de Bordeaux Hopital Haut leveque
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-
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
Inclusion Criteria:
- Consecutive eligible PD in- and outpatients selected at the university hospital of Bordeaux.
- Non-demented patients (DSM IV) who are able to give their informed consent and who are affiliated to the social security.
- Controls: Subjects without known neurological disorder, non-demented, able to give their informed consent and affiliated to the social security.
Exclusion Criteria:
- Patients: Atypical or secondary parkinson disease.
- Previous or current cancer or malignant haemopathy.
- Known auto-immune disease.
- Anti-neoplastic or immuno-modulator treatment (particularly corticosteroids). Immuno-deficient subjects.
- Acute viral infection (within 2 weeks after resolving). Statin drug intake. Demented subject (DSMIV).
- Controls: Same criteria as above plus any neurological disease.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Observationsmodeller: Case-Control
- Tidsperspektiver: Tværsnit
Kohorter og interventioner
Gruppe / kohorte |
Intervention / Behandling |
|---|---|
|
Parkinson's Disease patient
levodopa-treated parkinson's disease (PD) patients
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Demography, disease duration, treatment duration, current treatment, daily intake of levodopa, Disease stage (Hoehn and Yahr, HY), motor score (UPDRS III) and dyskinesia severity (UPDRS IV).
Biological variables.
Demography, Biological variables.
Eye movement recordings : non-invasive infra-red camera oculometry (EyeBrain) before and after (only parkinson's disease group) levodopa(10 to 15 minute/recording)
|
|
Non Parkinson's disease controls
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Demography, disease duration, treatment duration, current treatment, daily intake of levodopa, Disease stage (Hoehn and Yahr, HY), motor score (UPDRS III) and dyskinesia severity (UPDRS IV).
Biological variables.
Demography, Biological variables.
Eye movement recordings : non-invasive infra-red camera oculometry (EyeBrain) before and after (only parkinson's disease group) levodopa(10 to 15 minute/recording)
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
ERK phosphorylation
Tidsramme: Day 1
|
Distribution of variables and difference in the state of ERK phosphorylation in two contrasted groups : the dyskinetic levodopa-treated PD group and control group.
|
Day 1
|
Sekundære resultatmål
Resultatmål |
Tidsramme |
|---|---|
|
plasma and urinary dopamine in "on" and "off" state
Tidsramme: Day 1
|
Day 1
|
|
measure derivatives of morphine
Tidsramme: Day 1
|
Day 1
|
Samarbejdspartnere og efterforskere
Sponsor
Samarbejdspartnere
Efterforskere
- Ledende efterforsker: Nathalie DAMON-PERRIERE, Dr., University Hospital, Bordeaux
- Studiestol: Geneviève CHENE, Pr, University Hospital, Bordeaux
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
- CHUBX 2009/20
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
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