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Molecular Pharmacology

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Research ArticleArticle

Sensitized Increase of Period Gene Expression in the Mouse Caudate/Putamen Caused by Repeated Injection of Methamphetamine

Takato Nikaido, Masashi Akiyama, Takahiro Moriya and Shigenobu Shibata
Molecular Pharmacology April 2001, 59 (4) 894-900; DOI: https://doi.org/10.1124/mol.59.4.894
Takato Nikaido
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Masashi Akiyama
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Takahiro Moriya
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Shigenobu Shibata
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Abstract

Methamphetamine (MAP) causes the sensitization phenomena not only in MAP-induced locomotor activity, dopamine release, and Fos expression, but also in MAP-induced circadian rhythm. Cocaine-induced sensitization is reportedly impaired in Drosophila melanogastermutant for the Period (Per) gene. Thus, sensitization may be related to induction of thePer gene. A rapid induction of mPer1and/or mPer2 in the suprachiasmatic nucleus after light exposure is believed to be necessary for light-induced behavioral phase shifting. Although the caudate/putamen (CPu) expressesmPer1 and/or mPer2 mRNA, the function of these genes in this nucleus has not yet been elucidated. Therefore, we examined whether MAP affects the expression of mPer1and/or mPer2 mRNA in the mouse CPu. Injection of MAP augmented the expression of mPer1 but notmPer2 or mPer3 in the CPu, and this MAP-induced increase in mPer1 expression lasted for 2 h. Also, the MAP-induced increase of mPer1 mRNA was strongly antagonized by pretreatment with a dopamine D1 receptor and N-methyl-d-aspartate (NMDA) receptor antagonist, but not by a D2 receptor antagonist. Interestingly, application of either the D1 or the D2 agonist alone did not causemPer1 expression. The present results demonstrate that activation of both NMDA and D1 receptors is necessary to produce MAP-induced mPer1 expression in the CPu. Repeated injection of MAP caused a sensitization in not only the locomotor activity but also mPer1 expression in the CPu without affecting the level of mPer2, mPer3, ormTim mRNA. Thus, these results suggest that MAP-inducedmPer1 gene expression may be related to the mechanism for MAP-induced sensitization in the mouse.

Footnotes

    • Received September 8, 2000.
    • Accepted December 5, 2000.
  • Send reprint requests to: Shigenobu Shibata, Department of Pharmacology and Brain Science, School of Human Sciences, Waseda University, Tokorozawa, Saitama 359-1192, Japan. E-mail:shibata{at}human.waseda.ac.jp

  • This study was partially supported by grants awarded to S.S. from the Japanese Ministry of Education, Science, Sports, and Culture (11170248, 11233207, and 11145240), and by a grant-in-aid for Encouragement of Young Scientists to T.M. from the Japan Society for the Promotion of Science (11771503).

  • The American Society for Pharmacology and Experimental Therapeutics
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Molecular Pharmacology: 59 (4)
Molecular Pharmacology
Vol. 59, Issue 4
1 Apr 2001
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Research ArticleArticle

Sensitized Increase of Period Gene Expression in the Mouse Caudate/Putamen Caused by Repeated Injection of Methamphetamine

Takato Nikaido, Masashi Akiyama, Takahiro Moriya and Shigenobu Shibata
Molecular Pharmacology April 1, 2001, 59 (4) 894-900; DOI: https://doi.org/10.1124/mol.59.4.894

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Research ArticleArticle

Sensitized Increase of Period Gene Expression in the Mouse Caudate/Putamen Caused by Repeated Injection of Methamphetamine

Takato Nikaido, Masashi Akiyama, Takahiro Moriya and Shigenobu Shibata
Molecular Pharmacology April 1, 2001, 59 (4) 894-900; DOI: https://doi.org/10.1124/mol.59.4.894
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