Study of the Effects of Dopaminergic Medications on Dopamine Transporter Density in Subjects With Parkinson's Disease

Summary

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.

Timeline

Start

2005-01

Primary completion

2006-12

Completion

2007-01

Publications

• Background Ahlskog JE. Slowing Parkinson's disease progression: recent dopamine agonist trials. Neurology. 2003 Feb 11;60(3):381-9. doi: 10.1212/01.wnl.0000044047.58984.2f.
• Background 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. doi: 10.1002/1531-8257(199911)14:63.0.co;2-y.
• Background 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.
• Background Fahn S. Is levodopa toxic? Neurology. 1996 Dec;47(6 Suppl 3):S184-95. doi: 10.1212/wnl.47.6_suppl_3.184s. No abstract available.
• Background 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. doi: 10.1212/wnl.56.11.1559.
• Background 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. doi: 10.1073/pnas.90.24.11965.
• Background 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. doi: 10.1002/1531-8257(199905)14:33.0.co;2-j.
• Background 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. doi: 10.1016/s0006-8993(96)01033-5.
• Background 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. doi: 10.1212/wnl.57.11.2089.
• Background 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. doi: 10.1136/jnnp.64.3.314.
• Background 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. doi: 10.1097/00004647-200011000-00010.
• Background 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. doi: 10.1001/jama.287.13.1653.
• Background Fahn S; Parkinson Study Group. Does levodopa slow or hasten the rate of progression of Parkinson's disease? J Neurol. 2005 Oct;252 Suppl 4:IV37-IV42. doi: 10.1007/s00415-005-4008-5.
• Background 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. doi: 10.1002/mds.870120204.
• Background Schapira AH. Dopamine agonists and neuroprotection in Parkinson's disease. Eur J Neurol. 2002 Nov;9 Suppl 3:7-14. doi: 10.1046/j.1468-1331.9.s3.9.x.
• Background 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. doi: 10.1002/ana.10609.
• Background Wooten GF. Agonists vs levodopa in PD: the thrilla of whitha. Neurology. 2003 Feb 11;60(3):360-2. doi: 10.1212/wnl.60.3.360. No abstract available.

Drugs

Indications