Study of the Effects of Dopaminergic Medications on Dopamine Transporter Density in Subjects With Parkinson's Disease
This study investigates whether there is a change in 123iodine-2ß- carbomethoxy-3ß-(4-iodophenyl) tropane ([123I]ß-CIT) uptake after short-term treatment with levodopa compared to either dopamine agonist or placebo...
Brief Summary
Official Title: “A Single-blinded Assessment of the Short-term Effects of Cabergoline vs. Carbidopa/Levodopa on SPECT Dopamine Transporter Density in Out-patient Subjects With Parkinson's Disease”
This study investigates whether there is a change in 123iodine-2ß- carbomethoxy-3ß-(4-iodophenyl) tropane ([123I]ß-CIT) uptake after short-term treatment with levodopa compared to either dopamine agonist or placebo.
- Study Type: Interventional
- Study Design: Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Investigator), Primary Purpose: Diagnostic
- Study Primary Completion Date: December 2006
Detailed Clinical Trial Description
This is a multi-center, open-label study of short-term treatment with levodopa or cabergoline on striatal DATscan uptake in early Parkinson's disease. Approximately 120 Parkinson's disease subjects will be randomized to receive either carbidopa/levodopa, cabergoline or no treatment during a twelve week period. Subjects will undergo SPECT imaging with DATscan at screening and after 12 weeks. After twelve weeks carbidopa/levodopa and cabergoline treatment will be withdrawn and all subjects will undergo SPECT imaging with DATscan after 8 weeks (20 weeks after baseline).
Intervention(s) in this Clinical Trial
- Drug: cabergoline
- Approximately 120 Parkinson's disease subjects will be randomized to receive either carbidopa/levodopa, cabergoline or no treatment during a twelve week period. Subjects will undergo SPECT imaging with DATscan at screening and after 12 weeks. After twelve weeks carbidopa/levodopa and cabergoline treatment will be withdrawn and all subjects will undergo SPECT imaging with DATscan after 8 weeks (20 weeks after baseline).
- Drug: carbidopa/levodopa
- Approximately 120 Parkinson's disease subjects will be randomized to receive either carbidopa/levodopa, cabergoline or no treatment during a twelve week period. Subjects will undergo SPECT imaging with DATscan at screening and after 12 weeks. After twelve weeks carbidopa/levodopa and cabergoline treatment will be withdrawn and all subjects will undergo SPECT imaging with DATscan after 8 weeks (20 weeks after baseline).
- Procedure: DATscan and SPECT imaging
- Approximately 120 Parkinson's disease subjects will be randomized to receive either carbidopa/levodopa, cabergoline or no treatment during a twelve week period. Subjects will undergo SPECT imaging with DATscan at screening and after 12 weeks. After twelve weeks carbidopa/levodopa and cabergoline treatment will be withdrawn and all subjects will undergo SPECT imaging with DATscan after 8 weeks (20 weeks after baseline).
Outcome Measures for this Clinical Trial
Primary Measures
- To determine the influence of short-term levodopa therapy on dopamine transporter density in early Parkinson's disease
- Time Frame: 1 year
Safety Issue?: No
- Time Frame: 1 year
Secondary Measures
- To determine the influence of short-term treatment with cabergoline on dopamine transporter density in early Parkinson's disease
- Time Frame: 1 year
Safety Issue?: No
- Time Frame: 1 year
- To further develop the AMADEUS consortium, a collaboration of clinical-imaging SPECT DAT sites able to obtain data using comparable techniques and transmit imaging to a central analysis site
- Time Frame: 2 years
Safety Issue?: No
- Time Frame: 2 years
Criteria for Participation in this Clinical Trial
Inclusion Criteria:
- The subject is aged 40 years or older.
- Written informed consent is obtained.
- Subjects have a clinical diagnosis of idiopathic Parkinson's disease.
- Hoehn and Yahr stages for subjects are I-II.
Exclusion Criteria:
- The subject has atypical or drug-induced Parkinson's disease.
- The subject has dementia.
- The subject has clinically significant abnormal laboratory values, and/or clinically significant or unstable medical or psychiatric illness.
- The subject is pregnant.
Gender Eligibility for this Clinical Trial: Both
Minimum Age for this Clinical Trial: 40 Years
Maximum Age for this Clinical Trial: N/A
Are Healthy Volunteers Accepted for this Clinical Trial?: No
Clinical Trial Investigator Information
Lead Investigator: Institute for Neurodegenerative Disorders Other
Overall Clinical Trial Officials and Contacts
Kenneth L Marek, MD Principal Investigator The Institute for Neurodegenerative Disorders
Related Publications
References
Ahlskog JE. Slowing Parkinson's disease progression: recent dopamine agonist trials. Neurology. 2003 Feb 11;60(3):381-9. Review.
Ahlskog JE, Uitti RJ, O'Connor MK, Maraganore DM, Matsumoto JY, Stark KF, Turk MF, Burnett OL. The effect of dopamine agonist therapy on dopamine transporter imaging in Parkinson's disease. Mov Disord. 1999 Nov;14(6):940-6.
Brucke T, Asenbaum S, Pirker W, Djamshidian S, Wenger S, Wober C, Muller C, Podreka I. Measurement of the dopaminergic degeneration in Parkinson's disease with [123I] beta-CIT and SPECT. Correlation with clinical findings and comparison with multiple system atrophy and progressive supranuclear palsy. J Neural Transm Suppl. 1997;50:9-24.
Fahn S. Is levodopa toxic? Neurology. 1996 Dec;47(6 Suppl 3):S184-95. Review. No abstract available.
Guttman M, Stewart D, Hussey D, Wilson A, Houle S, Kish S. Influence of L-dopa and pramipexole on striatal dopamine transporter in early PD. Neurology. 2001 Jun 12;56(11):1559-64.
Innis RB, Seibyl JP, Scanley BE, Laruelle M, Abi-Dargham A, Wallace E, Baldwin RM, Zea-Ponce Y, Zoghbi S, Wang S, et al. Single photon emission computed tomographic imaging demonstrates loss of striatal dopamine transporters in Parkinson disease. Proc Natl Acad Sci U S A. 1993 Dec 15;90(24):11965-9.
Innis RB, Marek KL, Sheff K, Zoghbi S, Castronuovo J, Feigin A, Seibyl JP. Effect of treatment with L-dopa/carbidopa or L-selegiline on striatal dopamine transporter SPECT imaging with [123I]beta-CIT. Mov Disord. 1999 May;14(3):436-42.
Little KY, Gorebig J, Carroll FI, Mapili J, Meador-Woodruff JH. Lack of dopamine receptor agonists effect on striatal dopamine transporter binding sites. Brain Res. 1996 Dec 2;742(1-2):313-6.
Marek K, Innis R, van Dyck C, Fussell B, Early M, Eberly S, Oakes D, Seibyl J. [123I]beta-CIT SPECT imaging assessment of the rate of Parkinson's disease progression. Neurology. 2001 Dec 11;57(11):2089-94.
Morrish PK, Rakshi JS, Bailey DL, Sawle GV, Brooks DJ. Measuring the rate of progression and estimating the preclinical period of Parkinson's disease with [18F]dopa PET. J Neurol Neurosurg Psychiatry. 1998 Mar;64(3):314-9.
Nurmi E, Bergman J, Eskola O, Solin O, Hinkka SM, Sonninen P, Rinne JO. Reproducibility and effect of levodopa on dopamine transporter function measurements: a [18F]CFT PET study. J Cereb Blood Flow Metab. 2000 Nov;20(11):1604-9.
Parkinson Study Group. Dopamine transporter brain imaging to assess the effects of pramipexole vs levodopa on Parkinson disease progression. JAMA. 2002 Apr 3;287(13):1653-61.
Parkinson Study Group. Does levodopa slow or hasten the rate of progression of Parkinson's disease? The results of the ELLDOPA trial. Neurology 2003; 60(5) Suppl1: A80-A81.
Rioux L, Frohna PA, Joyce JN, Schneider JS. The effects of chronic levodopa treatment on pre- and postsynaptic markers of dopaminergic function in striatum of parkinsonian monkeys. Mov Disord. 1997 Mar;12(2):148-58.
Schapira AH. Dopamine agonists and neuroprotection in Parkinson's disease. Eur J Neurol. 2002 Nov;9 Suppl 3:7-14. Review.
Whone AL, Watts RL, Stoessl AJ, Davis M, Reske S, Nahmias C, Lang AE, Rascol O, Ribeiro MJ, Remy P, Poewe WH, Hauser RA, Brooks DJ; REAL-PET Study Group. Slower progression of Parkinson's disease with ropinirole versus levodopa: The REAL-PET study. Ann Neurol. 2003 Jul;54(1):93-101.
Wooten GF. Agonists vs levodopa in PD: the thrilla of whitha. Neurology. 2003 Feb 11;60(3):360-2. No abstract available.
Additional Information
Information obtained from ClinicalTrials.gov on February 12, 2012
Link to the current ClinicalTrials.gov record. http://clinicaltrials.gov/show/NCT00129181
Study ID Number: AMAD001
ClinicalTrials.gov Identifier: NCT00129181
Health Authority: Italy: The Italian Medicines Agency
Clinical Trials content is provided directly by the U.S. National Institutes of Health via ClinicalTrials.gov and is not reviewed separately by ClinicalTrialsFeeds.org. Every page of specific clinical trials information contains a unique identifier which can be used to find further details directly from the National Institutes of Health.
The URL of this page is:
http://clinicaltrialsfeeds.org/clinical-trials/show/NCT00129181
