Behavioral and cross sensitization after repeated exposure to modafinil and apomorphine in rats

Shang Tang Chang, Che Se Tung, Yu Lung Lin, Chia Hsin Chuang, An Rong Lee, Yia Ping Liu

研究成果: 雜誌貢獻文章同行評審

9 引文 斯高帕斯(Scopus)


Repeated exposure to psychostimulant drugs has been known to produce behavioral sensitization, a phenomenon explicitly indexed by locomotion (LM) and stereotyped movements (SM). So far, no evidence has demonstrated that this phenomenon can be displayed following the administration of modafinil (MOD) in animal study. We, therefore, assessed the possibility of behavioral sensitization of MOD and a direct dopamine agonist, apomorphine (APO), and cross-sensitization of these two drugs with one other. Pretreatment with MOD (64 mg/kg) or APO (0.5 mg/kg or 1.0 mg/kg) for 10 consecutive days was followed by a short-term (3 days) or long-term (21 days) withdrawal. Rats were then challenged with the drug and reciprocally re-challenged with the counterpart drug. The results showed that following short-term and long-term washout periods, both MOD and APO successfully induced sensitization in LM and SM. There was no cross-sensitization; an even lesser magnitude in LM when MOD-sensitized rats were challenged with APO was observed. However, after both the short-term and long-term withdrawal periods, APO (1.0 mg/kg)-sensitized rats showed cross-sensitization in LM and SM to MOD (64 mg/kg) challenge. The magnitude of APO-MOD cross-sensitization was lesser than the behavioral sensitization induced by APO alone. Our results indicated behavioral sensitization could be induced in rats exposed to MOD. In addition, changes in dopaminergic receptor activities could be involved in cross-sensitization of APO to MOD but not vice versa.
頁(從 - 到)318-327
期刊Chinese Journal of Physiology
出版狀態已發佈 - 2010

ASJC Scopus subject areas

  • 生理學
  • 生理學(醫學)


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