FosB mutant mice: Loss of chronic cocaine induction of Fos-related proteins and heightened sensitivity to cocaine's psychomotor and rewarding effects

Noboru Hiroi, Jennifer R. Brown, Colin N. Haile, Hong Ye, Michael E. Greenberg, Eric J. Nestler

Research output: Contribution to journalArticle

220 Citations (Scopus)

Abstract

Chronic exposure to cocaine leads to prominent, long-lasting changes in behavior that characterize a state of addiction. The striatum, including the nucleus accumbens and caudoputamen, is an important substrate for these actions. We previously have shown that long-lasting Fos-related proteins of 35-37 kDa are induced in the striatum by chronic cocaine administration. In the present study, the identity and functional role of these Fos-related proteins were examined using fosB mutant mice. The striatum of these mice completely lacked basal levels of the 35- to 37-kDa Fos-related proteins as well as their induction by chronic cocaine administration. This deficiency was associated with enhanced behavioral responses to cocaine: fosB mutant mice showed exaggerated locomotor activation in response to initial cocaine exposures as well as robust conditioned place preference to a lower dose of cocaine, compared with wild-type littermates. These results establish the long-lasting Fos-related proteins as products of the fosB gene (specifically ΔFosB isoforms) and suggest that transcriptional regulation by fosB gene products plays a critical role in cocaine-induced behavioral responses. This finding demonstrates that a Fos family member protein plays a functional role in behavioral responses to drugs of abuse and implicates fosB gene products as important determinants of cocaine abuse.

Original languageEnglish (US)
Pages (from-to)10397-10402
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume94
Issue number19
DOIs
StatePublished - Sep 16 1997
Externally publishedYes

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Cocaine
Proteins
Genes
Cocaine-Related Disorders
Nucleus Accumbens
Street Drugs
Protein Isoforms

ASJC Scopus subject areas

  • Genetics
  • General

Cite this

FosB mutant mice : Loss of chronic cocaine induction of Fos-related proteins and heightened sensitivity to cocaine's psychomotor and rewarding effects. / Hiroi, Noboru; Brown, Jennifer R.; Haile, Colin N.; Ye, Hong; Greenberg, Michael E.; Nestler, Eric J.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 94, No. 19, 16.09.1997, p. 10397-10402.

Research output: Contribution to journalArticle

Hiroi, Noboru ; Brown, Jennifer R. ; Haile, Colin N. ; Ye, Hong ; Greenberg, Michael E. ; Nestler, Eric J. / FosB mutant mice : Loss of chronic cocaine induction of Fos-related proteins and heightened sensitivity to cocaine's psychomotor and rewarding effects. In: Proceedings of the National Academy of Sciences of the United States of America. 1997 ; Vol. 94, No. 19. pp. 10397-10402.
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