An Open-Label Feasibility/Pilot Study With [123I]-IBZM SPECT (DOPA-SYN)

Summary

This study conducted to more fully evaluate the way that carbidopa/levodopa and entacapone may work in the brain. This research study uses \[123I\]-IBZM and dynamic SPECT imaging to determine the amount and the duration of dopamine release from specific regions in the brain after treatment with either the combination of carbidopa/levodopa or the combination of carbidopa/levodopa/entacapone.

Timeline

Start

2004-03

Primary completion

2004-09

Completion

2004-09

Publications

• Background Castner SA, al-Tikriti MS, Baldwin RM, Seibyl JP, Innis RB, Goldman-Rakic PS. Behavioral changes and [123I]IBZM equilibrium SPECT measurement of amphetamine-induced dopamine release in rhesus monkeys exposed to subchronic amphetamine. Neuropsychopharmacology. 2000 Jan;22(1):4-13. doi: 10.1016/S0893-133X(99)00080-9.
• Background de la Fuente-Fernandez R, Lu JQ, Sossi V, Jivan S, Schulzer M, Holden JE, Lee CS, Ruth TJ, Calne DB, Stoessl AJ. Biochemical variations in the synaptic level of dopamine precede motor fluctuations in Parkinson's disease: PET evidence of increased dopamine turnover. Ann Neurol. 2001 Mar;49(3):298-303. doi: 10.1002/ana.65.abs.
• Background Laruelle M, D'Souza CD, Baldwin RM, Abi-Dargham A, Kanes SJ, Fingado CL, Seibyl JP, Zoghbi SS, Bowers MB, Jatlow P, Charney DS, Innis RB. Imaging D2 receptor occupancy by endogenous dopamine in humans. Neuropsychopharmacology. 1997 Sep;17(3):162-74. doi: 10.1016/S0893-133X(97)00043-2.
• Background Seibyl JP, Woods SW, Zoghbi SS, Baldwin RM, Dey HM, Goddard AW, Zea-Ponce Y, Zubal G, Germine M, Smith EO, et al. Dynamic SPECT imaging of dopamine D2 receptors in human subjects with iodine-123-IBZM. J Nucl Med. 1992 Nov;33(11):1964-71.
• Background Seibyl JP, Zea-Ponce Y, Brenner L, Baldwin RM, Krystal JH, Offord SJ, Mochoviak S, Charney DS, Hoffer PB, Innis RB. Continuous intravenous infusion of iodine-123-IBZM for SPECT determination of human brain dopamine receptor occupancy by antipsychotic agent RWJ-37796. J Nucl Med. 1996 Jan;37(1):11-5.

Drugs

Indications