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Strain dependence of adolescent Cannabis influence on heroin reward and mesolimbic dopamine transmission in adult Lewis and Fischer 344 rats

Cadoni, Cristina; Simola, Nicola; Espa, Elena LU ; Fenu, Sandro and Di Chiara, Gaetano (2015) In Addiction Biology 20(1). p.42-132
Abstract

Adolescent Cannabis exposure has been hypothesized to act as a gateway to opiate abuse. In order to investigate the role of genetic background in cannabinoid-opiate interactions, we studied the effect of Δ(9) -tetrahydrocannabinol (THC) exposure of adolescent Lewis and Fischer 344 rats on the responsiveness of accumbens shell and core dopamine (DA), as monitored by microdialysis, to THC and heroin at adulthood. Heroin reward and reinstatement by heroin priming were studied by conditioned place preference (CPP) and cognitive and emotional functions by object recognition, Y maze and elevated plus maze paradigms. THC stimulated shell DA in Lewis but not in Fischer 344 rats. Adolescent THC exposure potentiated DA stimulant effects of heroin... (More)

Adolescent Cannabis exposure has been hypothesized to act as a gateway to opiate abuse. In order to investigate the role of genetic background in cannabinoid-opiate interactions, we studied the effect of Δ(9) -tetrahydrocannabinol (THC) exposure of adolescent Lewis and Fischer 344 rats on the responsiveness of accumbens shell and core dopamine (DA), as monitored by microdialysis, to THC and heroin at adulthood. Heroin reward and reinstatement by heroin priming were studied by conditioned place preference (CPP) and cognitive and emotional functions by object recognition, Y maze and elevated plus maze paradigms. THC stimulated shell DA in Lewis but not in Fischer 344 rats. Adolescent THC exposure potentiated DA stimulant effects of heroin in the shell and core of Lewis and only in the core of Fischer 344 rats. Control Lewis rats developed stronger CPP to heroin and resistance to extinction compared with Fischer 344 strain. In Lewis rats, THC exposure did not affect heroin CPP but potentiated the effect of heroin priming. In Fischer 344 rats, THC exposure increased heroin CPP and made it resistant to extinction. Lewis rats showed seeking reactions during extinction and hedonic reactions in response to heroin priming. Moreover, adolescent THC exposure affected emotional function only in Lewis rats. These observations suggest that long-term effects of Cannabis exposure on heroin addictive liability and emotionality are dependent on individual genetic background.

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published
keywords
Animals, Behavior, Animal, Cannabinoid Receptor Agonists, Dopamine, Dronabinol, Heroin, Heroin Dependence, Male, Microdialysis, Narcotics, Nucleus Accumbens, Rats, Rats, Inbred F344, Rats, Inbred Lew, Reward, Synaptic Transmission, Journal Article, Research Support, Non-U.S. Gov't
in
Addiction Biology
volume
20
issue
1
pages
11 pages
publisher
Wiley-Blackwell
external identifiers
  • scopus:84919663124
ISSN
1369-1600
DOI
10.1111/adb.12085
language
English
LU publication?
no
id
cfca40d7-ce4f-4b3a-af74-572f7a6db27f
date added to LUP
2017-03-29 21:40:49
date last changed
2017-11-19 04:38:58
@article{cfca40d7-ce4f-4b3a-af74-572f7a6db27f,
  abstract     = {<p>Adolescent Cannabis exposure has been hypothesized to act as a gateway to opiate abuse. In order to investigate the role of genetic background in cannabinoid-opiate interactions, we studied the effect of Δ(9) -tetrahydrocannabinol (THC) exposure of adolescent Lewis and Fischer 344 rats on the responsiveness of accumbens shell and core dopamine (DA), as monitored by microdialysis, to THC and heroin at adulthood. Heroin reward and reinstatement by heroin priming were studied by conditioned place preference (CPP) and cognitive and emotional functions by object recognition, Y maze and elevated plus maze paradigms. THC stimulated shell DA in Lewis but not in Fischer 344 rats. Adolescent THC exposure potentiated DA stimulant effects of heroin in the shell and core of Lewis and only in the core of Fischer 344 rats. Control Lewis rats developed stronger CPP to heroin and resistance to extinction compared with Fischer 344 strain. In Lewis rats, THC exposure did not affect heroin CPP but potentiated the effect of heroin priming. In Fischer 344 rats, THC exposure increased heroin CPP and made it resistant to extinction. Lewis rats showed seeking reactions during extinction and hedonic reactions in response to heroin priming. Moreover, adolescent THC exposure affected emotional function only in Lewis rats. These observations suggest that long-term effects of Cannabis exposure on heroin addictive liability and emotionality are dependent on individual genetic background.</p>},
  author       = {Cadoni, Cristina and Simola, Nicola and Espa, Elena and Fenu, Sandro and Di Chiara, Gaetano},
  issn         = {1369-1600},
  keyword      = {Animals,Behavior, Animal,Cannabinoid Receptor Agonists,Dopamine,Dronabinol,Heroin,Heroin Dependence,Male,Microdialysis,Narcotics,Nucleus Accumbens,Rats,Rats, Inbred F344,Rats, Inbred Lew,Reward,Synaptic Transmission,Journal Article,Research Support, Non-U.S. Gov't},
  language     = {eng},
  number       = {1},
  pages        = {42--132},
  publisher    = {Wiley-Blackwell},
  series       = {Addiction Biology},
  title        = {Strain dependence of adolescent Cannabis influence on heroin reward and mesolimbic dopamine transmission in adult Lewis and Fischer 344 rats},
  url          = {http://dx.doi.org/10.1111/adb.12085},
  volume       = {20},
  year         = {2015},
}