, Volume 195, Issue 1, pp 117–124 | Cite as

Gestational exposure to nicotine and monoamine oxidase inhibitors influences cocaine-induced locomotion in adolescent rats

  • Ryan M. Franke
  • James D. Belluzzi
  • Frances M. Leslie
Original Investigation



Many pregnant women continue to smoke, despite a strong association between maternal smoking and neurobehavioral deficits in the offspring. Although gestational nicotine (GN) treatment in rodents is used as the primary animal model of maternal smoking, tobacco smoke contains more than 4,000 constituents, including monoamine oxidase inhibitors (MAOIs).


The aim of this study was to determine whether there are interactions between the effects of gestational exposure to nicotine and MAOIs on cocaine-induced locomotor sensitization in adolescent rats.

Materials and methods

Pregnant rats were implanted on day 4 of gestation with osmotic minipumps delivering saline, nicotine (3 mg/kg per day), the MAOIs clorgyline and deprenyl (1 and 0.25 mg/kg per day, respectively), or nicotine/clorgyline/deprenyl (GMN). Adolescent female offspring were tested for cocaine-induced locomotor sensitization. Animals were treated with saline or cocaine (5 or 15 mg/kg, intraperitoneally) daily from postnatal (P) days 32–36 and challenged with cocaine (15 mg/kg) on P51 (day 20).


Group differences were observed in chronic but not acute effects of cocaine. Whereas gestational MAOI treatment, with or without nicotine, increased ambulatory response to cocaine on day 5, the opposite was found for vertical activity. Different adaptive responses were observed on cocaine challenge day. GNM animals exhibited enhanced locomotor activity in the cocaine-associated environment before cocaine challenge on day 20. In contrast, only GN animals exhibited significant locomotor sensitization to the cocaine challenge.


Gestational nicotine and MAOIs both influence brain development. Such interactions may sensitize adolescents to drug abuse and should be considered in animal models of maternal smoking.


Adolescence Clorgyline Deprenyl Dopamine Fetal Sensitization Maternal smoking Tobacco 


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Ryan M. Franke
    • 1
  • James D. Belluzzi
    • 1
  • Frances M. Leslie
    • 1
    • 2
  1. 1.Department of Pharmacology, School of MedicineUniversity of CaliforniaIrvineUSA
  2. 2.Department of Anatomy and Neurobiology, School of MedicineUniversity of CaliforniaIrvineUSA

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