Pharmacological challenge and synaptic response – assessing dopaminergic function in the rat striatum with small animal single-photon emission computed tomography (SPECT) and positron emission tomography (PET)
Identifieur interne : 000192 ( Main/Exploration ); précédent : 000191; suivant : 000193Pharmacological challenge and synaptic response – assessing dopaminergic function in the rat striatum with small animal single-photon emission computed tomography (SPECT) and positron emission tomography (PET)
Auteurs : Susanne Nikolaus [Allemagne] ; Rolf Larisch [Allemagne] ; Henning Vosberg [Allemagne] ; Markus Beu [Allemagne] ; Andreas Wirrwar [Allemagne] ; Christina Antke [Allemagne] ; Konstantin Kley [Allemagne] ; Maria Angelica De Souza Silva [Allemagne] ; Joseph P. Huston [Allemagne] ; Hans-Wilhelm Müller [Allemagne]Source :
- Reviews in the Neurosciences [ 0334-1763 ] ; 2011-12-01.
Abstract
Disturbances of dopaminergic neurotransmission may be caused by changes in concentrations of synaptic dopamine (DA) and/or availabilities of pre- and post-synaptic transporter and receptor binding sites. We present a series of experiments which focus on the regulatory mechanisms of the dopamin(DA)ergic synapse in the rat striatum. In these studies, DA transporter (DAT) and/or D2 receptor binding were assessed with either small animal single-photon emission computed tomography (SPECT) or positron emission tomography (PET) after pharmacological challenge with haloperidol, L-DOPA and methylphenidate, and after nigrostriatal 6-hydroxydopamine lesion. Investigations of DAT binding were performed with [123I]N-ω-fluoropropyl-2β-carbomethoxy-3β-(4-iodophenyl)nortropane ([123I]FP-CIT). D2 receptor bindingd was assessed with either [123I](S)-2-hydroxy-3-iodo-6-methoxy-N-[(1-ethyl-2-pyrrolidinyl)methyl]benzamide ([123I]IBZM) or [18F]1[3-(4′fluorobenzoyl)propyl]-4-(2-keto-3-methyl-1-benzimidazolinyl)piperidine ([18F]FMB). Findings demonstrate that in vivo investigations of transporter and/or receptor binding are feasible with small animal SPECT and PET. Therefore, tracers that are radiolabeled with isotopes of comparatively long half-lives such as 123I may be employed. Our approach to quantify DAT and/or D2 receptor binding at baseline and after pharmacological interventions inducing DAT blockade, D2 receptor blockade, and increases or decreases of endogenous DA concentrations holds promise for the in vivo assessment of synaptic function. This pertains to animal models of diseases associated with pre- or postsynaptic DAergic deficiencies such as Parkinson’s disease, Huntington’s disease, attention-deficit/hyperactivity disorder, schizophrenia or drug abuse.
Url:
DOI: 10.1515/RNS.2011.054
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We present a series of experiments which focus on the regulatory mechanisms of the dopamin(DA)ergic synapse in the rat striatum. In these studies, DA transporter (DAT) and/or D2 receptor binding were assessed with either small animal single-photon emission computed tomography (SPECT) or positron emission tomography (PET) after pharmacological challenge with haloperidol, L-DOPA and methylphenidate, and after nigrostriatal 6-hydroxydopamine lesion. Investigations of DAT binding were performed with [123I]N-ω-fluoropropyl-2β-carbomethoxy-3β-(4-iodophenyl)nortropane ([123I]FP-CIT). D2 receptor bindingd was assessed with either [123I](S)-2-hydroxy-3-iodo-6-methoxy-N-[(1-ethyl-2-pyrrolidinyl)methyl]benzamide ([123I]IBZM) or [18F]1[3-(4′fluorobenzoyl)propyl]-4-(2-keto-3-methyl-1-benzimidazolinyl)piperidine ([18F]FMB). Findings demonstrate that in vivo investigations of transporter and/or receptor binding are feasible with small animal SPECT and PET. Therefore, tracers that are radiolabeled with isotopes of comparatively long half-lives such as 123I may be employed. Our approach to quantify DAT and/or D2 receptor binding at baseline and after pharmacological interventions inducing DAT blockade, D2 receptor blockade, and increases or decreases of endogenous DA concentrations holds promise for the in vivo assessment of synaptic function. This pertains to animal models of diseases associated with pre- or postsynaptic DAergic deficiencies such as Parkinson’s disease, Huntington’s disease, attention-deficit/hyperactivity disorder, schizophrenia or drug abuse.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country></list><tree><country name="Allemagne"><noRegion><name sortKey="Nikolaus, Susanne" sort="Nikolaus, Susanne" uniqKey="Nikolaus S" first="Susanne" last="Nikolaus">Susanne Nikolaus</name></noRegion><name sortKey="Antke, Christina" sort="Antke, Christina" uniqKey="Antke C" first="Christina" last="Antke">Christina Antke</name><name sortKey="Beu, Markus" sort="Beu, Markus" uniqKey="Beu M" first="Markus" last="Beu">Markus Beu</name><name sortKey="Huston, Joseph P" sort="Huston, Joseph P" uniqKey="Huston J" first="Joseph P." last="Huston">Joseph P. Huston</name><name sortKey="Kley, Konstantin" sort="Kley, Konstantin" uniqKey="Kley K" first="Konstantin" last="Kley">Konstantin Kley</name><name sortKey="Larisch, Rolf" sort="Larisch, Rolf" uniqKey="Larisch R" first="Rolf" last="Larisch">Rolf Larisch</name><name sortKey="Muller, Hans Wilhelm" sort="Muller, Hans Wilhelm" uniqKey="Muller H" first="Hans-Wilhelm" last="Müller">Hans-Wilhelm Müller</name><name sortKey="Silva, Maria Angelica De Souza" sort="Silva, Maria Angelica De Souza" uniqKey="Silva M" first="Maria Angelica De Souza" last="Silva">Maria Angelica De Souza Silva</name><name sortKey="Vosberg, Henning" sort="Vosberg, Henning" uniqKey="Vosberg H" first="Henning" last="Vosberg">Henning Vosberg</name><name sortKey="Wirrwar, Andreas" sort="Wirrwar, Andreas" uniqKey="Wirrwar A" first="Andreas" last="Wirrwar">Andreas Wirrwar</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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