Effects of repeated methyl levodopa administration on apomorphine sensitivity of rotational behavior and striatal Fos expression of rats with unilateral 6-OHDA lesions

K. Kashihara, Y. Manabe, Y. Shiro, H. Warita, Koji Abe

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

This study was designed to elucidate the mechanism to develop levodopa-induced dyskinesia in patients with Parkinson's disease. For this purpose, we administered methyl levodopa repeatedly to a rat model of Parkinson's disease with unilateral 6-hydroxydopamine (6-OHDA)-induced lesion of the nigrostriatal dopamine pathway. After a washout period, we measured apomorphine sensitivity of contralateral rotation and made parallel determination of Fos expression in the caudate-putamen and globus pallidus of the same animal. Once daily, i.p. injection of methyl levodopa plus benserazide for 10 days increased the number of rotations over time. A challenge dose of apomorphine showed enhanced rotational response in rats pretreated with methyl levodopa. Repeated administration of methyl levodopa resulted in diminished apomorphine sensitivity of Fos expression in the dopamine depleted caudate-putamen and in enhanced sensitivity in the globus pallidus of the same side. Present results may add evidence to the idea that repeated administration of levodopa develops dopaminergic sensitization mediated by augmented activation of pallidal neurons involved in D2-responsive pallidal output pathway. (C) 2000 Elsevier Science Ireland Ltd.

Original languageEnglish
Pages (from-to)273-279
Number of pages7
JournalNeuroscience Research
Volume38
Issue number3
DOIs
Publication statusPublished - 2000

Fingerprint

Corpus Striatum
Apomorphine
Oxidopamine
Levodopa
Globus Pallidus
Putamen
Parkinson Disease
Dopamine
Dyskinesias
Neurons
Injections

Keywords

  • Caudate-putamen
  • Dopamine receptor
  • Dyskinesia
  • Globus pallidus
  • Parkinson's disease

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Effects of repeated methyl levodopa administration on apomorphine sensitivity of rotational behavior and striatal Fos expression of rats with unilateral 6-OHDA lesions. / Kashihara, K.; Manabe, Y.; Shiro, Y.; Warita, H.; Abe, Koji.

In: Neuroscience Research, Vol. 38, No. 3, 2000, p. 273-279.

Research output: Contribution to journalArticle

@article{a9d2f70d29ac4b1ba3241985754a588d,
title = "Effects of repeated methyl levodopa administration on apomorphine sensitivity of rotational behavior and striatal Fos expression of rats with unilateral 6-OHDA lesions",
abstract = "This study was designed to elucidate the mechanism to develop levodopa-induced dyskinesia in patients with Parkinson's disease. For this purpose, we administered methyl levodopa repeatedly to a rat model of Parkinson's disease with unilateral 6-hydroxydopamine (6-OHDA)-induced lesion of the nigrostriatal dopamine pathway. After a washout period, we measured apomorphine sensitivity of contralateral rotation and made parallel determination of Fos expression in the caudate-putamen and globus pallidus of the same animal. Once daily, i.p. injection of methyl levodopa plus benserazide for 10 days increased the number of rotations over time. A challenge dose of apomorphine showed enhanced rotational response in rats pretreated with methyl levodopa. Repeated administration of methyl levodopa resulted in diminished apomorphine sensitivity of Fos expression in the dopamine depleted caudate-putamen and in enhanced sensitivity in the globus pallidus of the same side. Present results may add evidence to the idea that repeated administration of levodopa develops dopaminergic sensitization mediated by augmented activation of pallidal neurons involved in D2-responsive pallidal output pathway. (C) 2000 Elsevier Science Ireland Ltd.",
keywords = "Caudate-putamen, Dopamine receptor, Dyskinesia, Globus pallidus, Parkinson's disease",
author = "K. Kashihara and Y. Manabe and Y. Shiro and H. Warita and Koji Abe",
year = "2000",
doi = "10.1016/S0168-0102(00)00167-X",
language = "English",
volume = "38",
pages = "273--279",
journal = "Neuroscience Research",
issn = "0168-0102",
publisher = "Elsevier Ireland Ltd",
number = "3",

}

TY - JOUR

T1 - Effects of repeated methyl levodopa administration on apomorphine sensitivity of rotational behavior and striatal Fos expression of rats with unilateral 6-OHDA lesions

AU - Kashihara, K.

AU - Manabe, Y.

AU - Shiro, Y.

AU - Warita, H.

AU - Abe, Koji

PY - 2000

Y1 - 2000

N2 - This study was designed to elucidate the mechanism to develop levodopa-induced dyskinesia in patients with Parkinson's disease. For this purpose, we administered methyl levodopa repeatedly to a rat model of Parkinson's disease with unilateral 6-hydroxydopamine (6-OHDA)-induced lesion of the nigrostriatal dopamine pathway. After a washout period, we measured apomorphine sensitivity of contralateral rotation and made parallel determination of Fos expression in the caudate-putamen and globus pallidus of the same animal. Once daily, i.p. injection of methyl levodopa plus benserazide for 10 days increased the number of rotations over time. A challenge dose of apomorphine showed enhanced rotational response in rats pretreated with methyl levodopa. Repeated administration of methyl levodopa resulted in diminished apomorphine sensitivity of Fos expression in the dopamine depleted caudate-putamen and in enhanced sensitivity in the globus pallidus of the same side. Present results may add evidence to the idea that repeated administration of levodopa develops dopaminergic sensitization mediated by augmented activation of pallidal neurons involved in D2-responsive pallidal output pathway. (C) 2000 Elsevier Science Ireland Ltd.

AB - This study was designed to elucidate the mechanism to develop levodopa-induced dyskinesia in patients with Parkinson's disease. For this purpose, we administered methyl levodopa repeatedly to a rat model of Parkinson's disease with unilateral 6-hydroxydopamine (6-OHDA)-induced lesion of the nigrostriatal dopamine pathway. After a washout period, we measured apomorphine sensitivity of contralateral rotation and made parallel determination of Fos expression in the caudate-putamen and globus pallidus of the same animal. Once daily, i.p. injection of methyl levodopa plus benserazide for 10 days increased the number of rotations over time. A challenge dose of apomorphine showed enhanced rotational response in rats pretreated with methyl levodopa. Repeated administration of methyl levodopa resulted in diminished apomorphine sensitivity of Fos expression in the dopamine depleted caudate-putamen and in enhanced sensitivity in the globus pallidus of the same side. Present results may add evidence to the idea that repeated administration of levodopa develops dopaminergic sensitization mediated by augmented activation of pallidal neurons involved in D2-responsive pallidal output pathway. (C) 2000 Elsevier Science Ireland Ltd.

KW - Caudate-putamen

KW - Dopamine receptor

KW - Dyskinesia

KW - Globus pallidus

KW - Parkinson's disease

UR - http://www.scopus.com/inward/record.url?scp=0033744072&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033744072&partnerID=8YFLogxK

U2 - 10.1016/S0168-0102(00)00167-X

DO - 10.1016/S0168-0102(00)00167-X

M3 - Article

VL - 38

SP - 273

EP - 279

JO - Neuroscience Research

JF - Neuroscience Research

SN - 0168-0102

IS - 3

ER -