Validations of apomorphine-induced BOLD activation correlations in hemiparkinsonian rhesus macaques
Identification of Parkinson's disease at the earliest possible stage of the disease may provide the best opportunity for the use of disease modifying treatments. However, diagnosing the disease during the pre-symptomatic period remains an unmet goal. To that end, we used pharmacological MRI (ph...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-01-01
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| Series: | NeuroImage: Clinical |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213158219300749 |
| _version_ | 1819265871553495040 |
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| author | J.E. Quintero Yi Ai A.H. Andersen P. Hardy R. Grondin Z. Guduru D.M. Gash G.A. Gerhardt Z. Zhang |
| author_facet | J.E. Quintero Yi Ai A.H. Andersen P. Hardy R. Grondin Z. Guduru D.M. Gash G.A. Gerhardt Z. Zhang |
| author_sort | J.E. Quintero |
| collection | DOAJ |
| description | Identification of Parkinson's disease at the earliest possible stage of the disease may provide the best opportunity for the use of disease modifying treatments. However, diagnosing the disease during the pre-symptomatic period remains an unmet goal. To that end, we used pharmacological MRI (phMRI) to assess the function of the cortico-basal ganglia circuit in a non-human primate model of dopamine deficiency to determine the possible relationships between phMRI signals with behavioral, neurochemical, and histological measurements. Animals with unilateral treatments with the neurotoxin, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), that expressed stable, long-term hemiparkinsonism were challenged with the dopaminergic receptor agonist, apomorphine, and structure-specific phMRI blood oxygen level-dependent (BOLD) activation responses were measured. Behavioral, histopathological, and neurochemical measurements were obtained and correlated with phMRI activation of structures of the cortico-basal ganglia system. Greater phMRI activations in the basal ganglia and cortex were associated with slower movement speed, decreased daytime activity, or more pronounced parkinsonian features. Animals showed decreased stimulus-evoked dopamine release in the putamen and substantia nigra pars compacta and lower basal glutamate levels in the motor cortex on the MPTP-lesioned hemisphere compared to the contralateral hemisphere. The altered neurochemistry was significantly correlated with phMRI signals in the motor cortex and putamen. Finally, greater phMRI activations in the caudate nucleus correlated with fewer tyrosine hydroxylase-positive (TH+) nigral cells and decreased TH+ fiber density in the putamen. These results reveal the correlation of phMRI signals with the severity of the motor deficits and pathophysiological changes in the cortico-basal ganglia circuit. Keywords: fMRI, Pharmacological MRI, Neurochemistry, Parkinson's disease |
| first_indexed | 2024-12-23T20:52:16Z |
| format | Article |
| id | doaj.art-b63c9e90afd24d0dab663533345bc9fb |
| institution | Directory Open Access Journal |
| issn | 2213-1582 |
| language | English |
| last_indexed | 2024-12-23T20:52:16Z |
| publishDate | 2019-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | NeuroImage: Clinical |
| spelling | doaj.art-b63c9e90afd24d0dab663533345bc9fb2022-12-21T17:31:38ZengElsevierNeuroImage: Clinical2213-15822019-01-0122Validations of apomorphine-induced BOLD activation correlations in hemiparkinsonian rhesus macaquesJ.E. Quintero0Yi Ai1A.H. Andersen2P. Hardy3R. Grondin4Z. Guduru5D.M. Gash6G.A. Gerhardt7Z. Zhang8Department of Neuroscience, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USADepartment of Neuroscience, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USADepartment of Neuroscience, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USA; Magnetic Resonance Imaging and Spectroscopy Center, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USAMagnetic Resonance Imaging and Spectroscopy Center, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USADepartment of Neuroscience, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USADepartment of Neurology, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USADepartment of Neuroscience, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USADepartment of Neuroscience, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USADepartment of Neuroscience, University of Kentucky Chandler Medical Center, Lexington, KY 40536-0098, USA; Corresponding author at: Department of Neuroscience, University of Kentucky Chandler Medical Center, 48 Whitney-Hendrickson Bldg, Lexington, KY 40536-0098, USA.Identification of Parkinson's disease at the earliest possible stage of the disease may provide the best opportunity for the use of disease modifying treatments. However, diagnosing the disease during the pre-symptomatic period remains an unmet goal. To that end, we used pharmacological MRI (phMRI) to assess the function of the cortico-basal ganglia circuit in a non-human primate model of dopamine deficiency to determine the possible relationships between phMRI signals with behavioral, neurochemical, and histological measurements. Animals with unilateral treatments with the neurotoxin, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), that expressed stable, long-term hemiparkinsonism were challenged with the dopaminergic receptor agonist, apomorphine, and structure-specific phMRI blood oxygen level-dependent (BOLD) activation responses were measured. Behavioral, histopathological, and neurochemical measurements were obtained and correlated with phMRI activation of structures of the cortico-basal ganglia system. Greater phMRI activations in the basal ganglia and cortex were associated with slower movement speed, decreased daytime activity, or more pronounced parkinsonian features. Animals showed decreased stimulus-evoked dopamine release in the putamen and substantia nigra pars compacta and lower basal glutamate levels in the motor cortex on the MPTP-lesioned hemisphere compared to the contralateral hemisphere. The altered neurochemistry was significantly correlated with phMRI signals in the motor cortex and putamen. Finally, greater phMRI activations in the caudate nucleus correlated with fewer tyrosine hydroxylase-positive (TH+) nigral cells and decreased TH+ fiber density in the putamen. These results reveal the correlation of phMRI signals with the severity of the motor deficits and pathophysiological changes in the cortico-basal ganglia circuit. Keywords: fMRI, Pharmacological MRI, Neurochemistry, Parkinson's diseasehttp://www.sciencedirect.com/science/article/pii/S2213158219300749 |
| spellingShingle | J.E. Quintero Yi Ai A.H. Andersen P. Hardy R. Grondin Z. Guduru D.M. Gash G.A. Gerhardt Z. Zhang Validations of apomorphine-induced BOLD activation correlations in hemiparkinsonian rhesus macaques NeuroImage: Clinical |
| title | Validations of apomorphine-induced BOLD activation correlations in hemiparkinsonian rhesus macaques |
| title_full | Validations of apomorphine-induced BOLD activation correlations in hemiparkinsonian rhesus macaques |
| title_fullStr | Validations of apomorphine-induced BOLD activation correlations in hemiparkinsonian rhesus macaques |
| title_full_unstemmed | Validations of apomorphine-induced BOLD activation correlations in hemiparkinsonian rhesus macaques |
| title_short | Validations of apomorphine-induced BOLD activation correlations in hemiparkinsonian rhesus macaques |
| title_sort | validations of apomorphine induced bold activation correlations in hemiparkinsonian rhesus macaques |
| url | http://www.sciencedirect.com/science/article/pii/S2213158219300749 |
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