Motor Activation in Multiple System Atrophy and Parkinson Disease: a Positron Emission Tomography (PET) Study

NCT ID: NCT01044992

Last Updated: 2010-02-26

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 38 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2002-05-31
• Study Completion Date: 2006-05-31

Brief Summary

Background: Multiple System Atrophy (MSA) is an atypical parkinsonian syndrome including cerebellar impairment and poor response to dopatherapy. The objective of the study is to assess right-hand motor activation in MSA patients before and after an acute levodopa challenge and to compare these data with those obtained in patients with Parkinson Disease (PD) and healthy volunteers (HV).

Methods: Eighteen MSA patients, eight PD patients and 10 age-matched HV will be included. rCBF measurements with H215O PET will be performed at rest and during a right hand movement. Statistical parametric mapping will be used to analyze motor versus rest in OFF and ON condition and effect of levodopa on motor activation.

Hypothesis: MSA and PD patient should recruited different motor networks.

Detailed Description

Subjects. In this prospective study, MSA patients will be included if they met Gilman criteria for probable MSA. All those subjects will be distinguished between parkinsonian form (MSA-P) and cerebellar form (MSA-C). All will underwent Unified Parkinson's Disease Rating Scale UPDRS and International Cooperative Ataxia Rating Scale ICARSS. All patients will have a poor response to levodopa (<30% of the UPDRS score). Patients with PD will be included if they suffered from idiopathic PD according to the criteria of UKPDSBB and had a positive response to levodopa (≥ 30% improvement on UPDRS part III). All healthy subjects will have normal neurological examination and none will have a history of neurological, cardiovascular or psychiatric disturbance. For all subjects, handedness will be determined by the Edinburg test. For all patients (MSA and PD) a MRI brain scan will be realized PET activation study PET investigations will be performed during two pharmacological conditions: OFF (e.g after 12 hours of usual dopaminergic treatment discontinuation) and ON (after an acute oral levodopa challenge) in all subjects. During each PET there will be two motor conditions: rest (no movement, hand and wrist lying on the joystick) and a right-hand movement, consisting of moving joystick in 4 four different directions avoiding sequence repetition. Movement will be paced by an auditory stimulus at a frequency of 0.33 Hz. Each patient will be trained to perform the joystick movement before the PET. During PET investigation, angular wrist speed and angular wrist acceleration will be recorded using a computer recording connected to a joystick. The movement will start 30 seconds before image acquisition. Rest and Movement scan conditions will be replicated, making a total number of 6 six scans per patient in OFF condition and 6 six scans per patient in ON condition. The order of OFF and ON sessions and motor conditions will be fully counterbalanced across subjects to eliminate time and order effects.

H215O will be intravenously injected in the arm contralateral to the hand movement. PET measurements will be performed with an EXACT HR+ tomograph (CTI/Siemens, Knoxville, TN, USA) allowing the simultaneous 3D acquisition of 63 transaxial slices. Spatial resolution after reconstruction reached 4.5 and 4.1 mm in the transaxial and axial direction, respectively {Bendriem, 1996 #39}(19). To measure rCBF, 300 MBq of H215O will be administered for each 80-second emission scan. To allow complete decay of injected tracer activity, image acquisitions will be performed 10 minutes apart.

Image analysis will be performed on a personal computer station (DELL inc, Round Rock, Texas, USA) using the "statistical parametric mapping" package (SPM2, Wellcome Department of Cognitive Neurology, London, United Kingdom). Images of each subject will be realigned to the first volume and normalized to the MNI standard proportional stereotaxic space, which is based on that of Talairach and Tournoux (1988). The images will be coregistered on a template and spatially smoothed with a Gaussian kernel of 12 mm full width at half maximum (FWHM) to take into account variations in gyral anatomy and individual variability in structure-function relationships, and to improve the signal-to-noise ratio.

Statistical analysis :

All baseline characteristics in MSA, PD and healthy volunteers will be compared by the Man-Whitney U test. For PET imaging, the 36 subjects will be included in the same statistical analysis on a voxel-by-voxel basis. Statistical parametric maps will be generated using an ANCOVA model implemented through the General Linear Model formulation of SPM after normalization for global effect by proportional scaling. We will analyze three main effects 1) The "movement effect" consists of comparing the images obtained during hand movement with those acquired at rest for each group (MSA, PD and Healthy subjects) using the Family Wise Error (FWE) statistical threshold at P < 0.05 for peak height in OFF and ON conditions. 2) Difference between motor activation of the three groups in OFF condition. 3) Difference between motor activation during OFF and ON condition in each group reflecting levodopa effect on motor activation. For inter groups comparisons statistical threshold will set at p<0.01 with clusters>10 voxels.

Conditions

Multisystemic Atrophy

Keywords

Multi systemic atrophy; Parkinson Disease; PET investigation; Motor control; levodopa; MSA; Comparison with Parkinson disease and dopaminergic challenge.

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: DOUBLE

Study Groups

Drug and radiation

Levodopa and H215O PET

Group Type: EXPERIMENTAL

H215O PET

Intervention Type: RADIATION

H215O PET investigations will be performed during two pharmacological conditions: OFF (e.g after 12 hours of usual dopaminergic treatment discontinuation) and ON (after an acute oral levodopa challenge) in all subjects. During each PET there will be two motor conditions: rest (no movement, hand and wrist lying on the joystick) and a right-hand movement, consisting of moving joystick in 4 four different directions avoiding sequence repetition performed at rest and during a right hand movement.

Levodopa

Intervention Type: DRUG

Levodopa: the dosage of levodopa challenge will be equivalent to the first morning dose increased by 100 mg of levodopa whereas the dosage will be 200 mg in healthy subjects.

Interventions

H215O PET

H215O PET investigations will be performed during two pharmacological conditions: OFF (e.g after 12 hours of usual dopaminergic treatment discontinuation) and ON (after an acute oral levodopa challenge) in all subjects. During each PET there will be two motor conditions: rest (no movement, hand and wrist lying on the joystick) and a right-hand movement, consisting of moving joystick in 4 four different directions avoiding sequence repetition performed at rest and during a right hand movement.

Intervention Type: RADIATION

Levodopa

Levodopa: the dosage of levodopa challenge will be equivalent to the first morning dose increased by 100 mg of levodopa whereas the dosage will be 200 mg in healthy subjects.

Intervention Type: DRUG

Other Intervention Names

To measure rCBF, 300 MBq of H215O will be administered for each 80-second emission scan.

Eligibility Criteria

Inclusion Criteria

• MSA patients will be included if they met Gilman criteria for probable MSA. All those subjects will be distinguished between parkinsonian form (MSA-P) and cerebellar form (MSA-C). All will underwent Unified Parkinson's Disease Rating Scale UPDRS and International Cooperative Ataxia Rating Scale ICARSS. All patients will have a poor response to levodopa (<30% of the UPDRS score).
• Patients with PD will be included if they suffered from idiopathic PD according to the criteria of UKPDSBB and had a positive response to levodopa (≥ 30% improvement on UPDRS part III).
• All healthy subjects will have normal neurological examination and none will have a history of neurological, cardiovascular or psychiatric disturbance.
• For all subjects, handedness will be determined by the Edinburg test. For all patients (MSA and PD) a MRI brain scan will be realized

• Minimum Eligible Age: 40 Years
• Maximum Eligible Age: 75 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University Hospital, Toulouse

OTHER

Sponsor Role: lead

Responsible Party

University Hospital Toulouse

Principal Investigators

Olivier Rascol, MD PHD

Role: STUDY_DIRECTOR

University Hospital, Toulouse

Pierre Payoux, MD PhD

Role: STUDY_DIRECTOR

University Hospital, Toulouse

Olivier Rascol, MD PhD

Role: PRINCIPAL_INVESTIGATOR

University Hospital, Toulouse

Franck Durif, MD PhD

Role: PRINCIPAL_INVESTIGATOR

University Hospital, Clermont-Ferrand

Jean-Philippe Azulay, MD PhD

Role: PRINCIPAL_INVESTIGATOR

University Hospital, Marseille

François Tison, MD PhD

Role: PRINCIPAL_INVESTIGATOR

University Hospital, Bordeaux

Locations

University Hospital

Bordeaux, , France

University Hospital

Clermont-Ferrand, , France

University Hospital

Marseille, , France

University Hospital

Toulouse, , France

Countries

France

Other Identifiers

PHRC

Identifier Type: OTHER_GRANT

Identifier Source: secondary_id

01 036 08

Identifier Type: -

Identifier Source: org_study_id