La maladie de Parkinson au Canada (serveur d'exploration)

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Increased Levels of 5-HT1A Receptor Binding in Ventral Visual Pathways in Parkinson's Disease

Identifieur interne : 000149 ( PascalFrancis/Checkpoint ); précédent : 000148; suivant : 000150

Increased Levels of 5-HT1A Receptor Binding in Ventral Visual Pathways in Parkinson's Disease

Auteurs : Philippe Huot [Canada] ; Tom H. Johnston [Canada] ; Naomi P. Visanji [Canada] ; Tayyeba Darr [Canada] ; Donna Pires [Canada] ; Lili-Naz Hazrati [Canada] ; Jonathan M. Brotchie [Canada] ; Susan H. Fox [Canada]

Source :

RBID : Pascal:12-0248754

Descripteurs français

English descriptors

Abstract

Visual hallucinations are common in advanced Parkinson's disease (PD). The pathophysiology of visual hallucinations may involve enhanced serotonergic neurotransmission. The atypical antipsychotics clozapine and quetiapine, which have affinity for 5-HT2A and 5-HT1A receptors, are effective against visual hallucinations in PD. 5-HT2A receptors are increased in ventral visual pathways in PD patients with visual hallucinations, and we hypothesized that 5-HT1A receptors were also involved in visual hallucinations in PD. Autoradiographic binding using [3H]-WAY-100,635 and NAN-190 was performed in brain sections from 6 PD patients with visual hallucinations, 6 PD patients without visual hallucinations, and 5 age-matched controls. All PD subjects had been treated with L-dopa. Brain areas studied were the orbitofrontal, inferolateral temporal, and motor cortices, as well as the striatum, globus pallidus, substantia nigra, and thalamus. 5-HT1A-binding levels were dramatically increased in the ventral visual pathways of all PD patients compared with controls (0 vs 11 and 0 vs 100 nmol/mg, respectively; both P < .05). There was no significant difference in 5-HT1A-binding levels in PD patients with visual hallucinations compared with PD patients without visual hallucinations or with controls in any of the brain areas studied (P > .05). Gross abnormalities in 5-HT1A levels in ventral visual areas occurred in all PD patients exposed to L-dopa. However, as there was no difference in 5-HT1A-binding levels between hallucinators and nonhallucinators, alterations in 5-HT1A receptor levels may not contribute specifically to visual hallucinations in PD. However, the discrete anatomical distribution of rises to the ventral visual areas suggests some role in predisposing to visual hallucinations.


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Pascal:12-0248754

Le document en format XML

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<div type="abstract" xml:lang="en">Visual hallucinations are common in advanced Parkinson's disease (PD). The pathophysiology of visual hallucinations may involve enhanced serotonergic neurotransmission. The atypical antipsychotics clozapine and quetiapine, which have affinity for 5-HT
<sub>2A</sub>
and 5-HT
<sub>1A</sub>
receptors, are effective against visual hallucinations in PD. 5-HT
<sub>2A</sub>
receptors are increased in ventral visual pathways in PD patients with visual hallucinations, and we hypothesized that 5-HT
<sub>1A</sub>
receptors were also involved in visual hallucinations in PD. Autoradiographic binding using [
<sup>3</sup>
H]-WAY-100,635 and NAN-190 was performed in brain sections from 6 PD patients with visual hallucinations, 6 PD patients without visual hallucinations, and 5 age-matched controls. All PD subjects had been treated with
<sub>L</sub>
-dopa. Brain areas studied were the orbitofrontal, inferolateral temporal, and motor cortices, as well as the striatum, globus pallidus, substantia nigra, and thalamus. 5-HT
<sub>1A</sub>
-binding levels were dramatically increased in the ventral visual pathways of all PD patients compared with controls (0 vs 11 and 0 vs 100 nmol/mg, respectively; both P < .05). There was no significant difference in 5-HT
<sub>1A</sub>
-binding levels in PD patients with visual hallucinations compared with PD patients without visual hallucinations or with controls in any of the brain areas studied (P > .05). Gross abnormalities in 5-HT
<sub>1A</sub>
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<sub>L</sub>
-dopa. However, as there was no difference in 5-HT
<sub>1A</sub>
-binding levels between hallucinators and nonhallucinators, alterations in 5-HT
<sub>1A</sub>
receptor levels may not contribute specifically to visual hallucinations in PD. However, the discrete anatomical distribution of rises to the ventral visual areas suggests some role in predisposing to visual hallucinations.</div>
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<s0>Visual hallucinations are common in advanced Parkinson's disease (PD). The pathophysiology of visual hallucinations may involve enhanced serotonergic neurotransmission. The atypical antipsychotics clozapine and quetiapine, which have affinity for 5-HT
<sub>2A</sub>
and 5-HT
<sub>1A</sub>
receptors, are effective against visual hallucinations in PD. 5-HT
<sub>2A</sub>
receptors are increased in ventral visual pathways in PD patients with visual hallucinations, and we hypothesized that 5-HT
<sub>1A</sub>
receptors were also involved in visual hallucinations in PD. Autoradiographic binding using [
<sup>3</sup>
H]-WAY-100,635 and NAN-190 was performed in brain sections from 6 PD patients with visual hallucinations, 6 PD patients without visual hallucinations, and 5 age-matched controls. All PD subjects had been treated with
<sub>L</sub>
-dopa. Brain areas studied were the orbitofrontal, inferolateral temporal, and motor cortices, as well as the striatum, globus pallidus, substantia nigra, and thalamus. 5-HT
<sub>1A</sub>
-binding levels were dramatically increased in the ventral visual pathways of all PD patients compared with controls (0 vs 11 and 0 vs 100 nmol/mg, respectively; both P < .05). There was no significant difference in 5-HT
<sub>1A</sub>
-binding levels in PD patients with visual hallucinations compared with PD patients without visual hallucinations or with controls in any of the brain areas studied (P > .05). Gross abnormalities in 5-HT
<sub>1A</sub>
levels in ventral visual areas occurred in all PD patients exposed to
<sub>L</sub>
-dopa. However, as there was no difference in 5-HT
<sub>1A</sub>
-binding levels between hallucinators and nonhallucinators, alterations in 5-HT
<sub>1A</sub>
receptor levels may not contribute specifically to visual hallucinations in PD. However, the discrete anatomical distribution of rises to the ventral visual areas suggests some role in predisposing to visual hallucinations.</s0>
</fC01>
<fC02 i1="01" i2="X">
<s0>002B17</s0>
</fC02>
<fC02 i1="02" i2="X">
<s0>002B17G</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE">
<s0>Maladie de Parkinson</s0>
<s2>NM</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG">
<s0>Parkinson disease</s0>
<s2>NM</s2>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA">
<s0>Parkinson enfermedad</s0>
<s2>NM</s2>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE">
<s0>Hallucination visuelle</s0>
<s2>NM</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG">
<s0>Visual hallucination</s0>
<s2>NM</s2>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA">
<s0>Alucinación visual</s0>
<s2>NM</s2>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE">
<s0>Pathologie du système nerveux</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG">
<s0>Nervous system diseases</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA">
<s0>Sistema nervioso patología</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE">
<s0>Récepteur sérotoninergique 5-HT1A</s0>
<s5>09</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG">
<s0>5-HT1A Serotonine receptor</s0>
<s5>09</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA">
<s0>Receptor serotoninérgico 5-HT1A</s0>
<s5>09</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE">
<s0>Voie visuelle</s0>
<s5>10</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG">
<s0>Visual pathway</s0>
<s5>10</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA">
<s0>Vía visual</s0>
<s5>10</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE">
<s0>Sérotonine</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>11</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG">
<s0>Serotonin</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>11</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA">
<s0>Serotonina</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>11</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE">
<s0>Lévodopa</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>12</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG">
<s0>Levodopa</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>12</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA">
<s0>Levodopa</s0>
<s2>NK</s2>
<s2>FR</s2>
<s5>12</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE">
<s0>Pathologie de l'encéphale</s0>
<s5>37</s5>
</fC07>
<fC07 i1="01" i2="X" l="ENG">
<s0>Cerebral disorder</s0>
<s5>37</s5>
</fC07>
<fC07 i1="01" i2="X" l="SPA">
<s0>Encéfalo patología</s0>
<s5>37</s5>
</fC07>
<fC07 i1="02" i2="X" l="FRE">
<s0>Syndrome extrapyramidal</s0>
<s5>38</s5>
</fC07>
<fC07 i1="02" i2="X" l="ENG">
<s0>Extrapyramidal syndrome</s0>
<s5>38</s5>
</fC07>
<fC07 i1="02" i2="X" l="SPA">
<s0>Extrapiramidal síndrome</s0>
<s5>38</s5>
</fC07>
<fC07 i1="03" i2="X" l="FRE">
<s0>Maladie dégénérative</s0>
<s5>39</s5>
</fC07>
<fC07 i1="03" i2="X" l="ENG">
<s0>Degenerative disease</s0>
<s5>39</s5>
</fC07>
<fC07 i1="03" i2="X" l="SPA">
<s0>Enfermedad degenerativa</s0>
<s5>39</s5>
</fC07>
<fC07 i1="04" i2="X" l="FRE">
<s0>Pathologie du système nerveux central</s0>
<s5>40</s5>
</fC07>
<fC07 i1="04" i2="X" l="ENG">
<s0>Central nervous system disease</s0>
<s5>40</s5>
</fC07>
<fC07 i1="04" i2="X" l="SPA">
<s0>Sistema nervosio central patología</s0>
<s5>40</s5>
</fC07>
<fC07 i1="05" i2="X" l="FRE">
<s0>Neurotransmetteur</s0>
<s5>42</s5>
</fC07>
<fC07 i1="05" i2="X" l="ENG">
<s0>Neurotransmitter</s0>
<s5>42</s5>
</fC07>
<fC07 i1="05" i2="X" l="SPA">
<s0>Neurotransmisor</s0>
<s5>42</s5>
</fC07>
<fN21>
<s1>191</s1>
</fN21>
<fN44 i1="01">
<s1>OTO</s1>
</fN44>
<fN82>
<s1>OTO</s1>
</fN82>
</pA>
</standard>
</inist>
<affiliations>
<list>
<country>
<li>Canada</li>
</country>
<region>
<li>Ontario</li>
</region>
<settlement>
<li>Toronto</li>
</settlement>
<orgName>
<li>Université de Toronto</li>
</orgName>
</list>
<tree>
<country name="Canada">
<noRegion>
<name sortKey="Huot, Philippe" sort="Huot, Philippe" uniqKey="Huot P" first="Philippe" last="Huot">Philippe Huot</name>
</noRegion>
<name sortKey="Brotchie, Jonathan M" sort="Brotchie, Jonathan M" uniqKey="Brotchie J" first="Jonathan M." last="Brotchie">Jonathan M. Brotchie</name>
<name sortKey="Darr, Tayyeba" sort="Darr, Tayyeba" uniqKey="Darr T" first="Tayyeba" last="Darr">Tayyeba Darr</name>
<name sortKey="Fox, Susan H" sort="Fox, Susan H" uniqKey="Fox S" first="Susan H." last="Fox">Susan H. Fox</name>
<name sortKey="Fox, Susan H" sort="Fox, Susan H" uniqKey="Fox S" first="Susan H." last="Fox">Susan H. Fox</name>
<name sortKey="Hazrati, Lili Naz" sort="Hazrati, Lili Naz" uniqKey="Hazrati L" first="Lili-Naz" last="Hazrati">Lili-Naz Hazrati</name>
<name sortKey="Huot, Philippe" sort="Huot, Philippe" uniqKey="Huot P" first="Philippe" last="Huot">Philippe Huot</name>
<name sortKey="Johnston, Tom H" sort="Johnston, Tom H" uniqKey="Johnston T" first="Tom H." last="Johnston">Tom H. Johnston</name>
<name sortKey="Pires, Donna" sort="Pires, Donna" uniqKey="Pires D" first="Donna" last="Pires">Donna Pires</name>
<name sortKey="Visanji, Naomi P" sort="Visanji, Naomi P" uniqKey="Visanji N" first="Naomi P." last="Visanji">Naomi P. Visanji</name>
</country>
</tree>
</affiliations>
</record>

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