ΔFosB accumulates in a GABAergic cell population in the posterior tail of the ventral tegmental area after psychostimulant treatment

Linda I. Perrotti, Carlos A. Bolaños, Kwang Ho Choi, Scott J. Russo, Scott Edwards, Paula G. Ulery, Deanna L. Wallace, David W. Self, Eric J. Nestler, Michel Barrot

Research output: Contribution to journalArticle

132 Scopus citations

Abstract

The transcription factor ΔFosB is induced in the nucleus accumbens and dorsal striatum by chronic exposure to several drugs of abuse, and increasing evidence supports the possibility that this induction is involved in the addiction process. However, to date there has been no report of ΔFosB induction by drugs of abuse in the ventral tegmental area (VTA), which is also a critical brain reward region. In the present study, we used immunohistochemistry to demonstrate that chronic forced administration of cocaine induces ΔFosB in the rat VTA. This induction occurs selectively in a γ-aminobutyric acid (GABA) cell population within the posterior tail of the VTA. A similar effect is seen after chronic cocaine self-administration. Induction of ΔFosB in the VTA occurs after psychostimulant treatment only: it is seen with both chronic cocaine and amphetamine, but not with chronic opiates or stress. The expression of ΔFosB appears to be mediated by dopamine systems, as repeated administration of a dopamine uptake inhibitor induced ΔFosB in the VTA, while administration of serotonin or norepinephrine uptake inhibitors failed to produce this effect. Time course analysis showed that, following 14 days of cocaine administration, ΔFosB persists in the VTA for almost 2 weeks after cocaine withdrawal. This accumulation and persistence may account for some of the long-lasting changes in the brain associated with chronic drug use. These results provide the first evidence of ΔFosB induction in a discrete population of GABA cells in the VTA, which may regulate the functioning of the brain's reward mechanisms.

Original languageEnglish (US)
Pages (from-to)2817-2824
Number of pages8
JournalEuropean Journal of Neuroscience
Volume21
Issue number10
DOIs
StatePublished - May 1 2005

Keywords

  • Cocaine
  • Dopamine
  • FosB
  • Immunohistochemistry
  • Rat

ASJC Scopus subject areas

  • Neuroscience(all)

Fingerprint Dive into the research topics of 'ΔFosB accumulates in a GABAergic cell population in the posterior tail of the ventral tegmental area after psychostimulant treatment'. Together they form a unique fingerprint.

  • Cite this

    Perrotti, L. I., Bolaños, C. A., Choi, K. H., Russo, S. J., Edwards, S., Ulery, P. G., Wallace, D. L., Self, D. W., Nestler, E. J., & Barrot, M. (2005). ΔFosB accumulates in a GABAergic cell population in the posterior tail of the ventral tegmental area after psychostimulant treatment. European Journal of Neuroscience, 21(10), 2817-2824. https://doi.org/10.1111/j.1460-9568.2005.04110.x