Skip to main content
Log in

Anticataleptic activity of nicotine in rats: involvement of the lateral entorhinal cortex

  • Original Investigation
  • Published:
Psychopharmacology Aims and scope Submit manuscript

An Editorial Expression of Concern to this article was published on 21 May 2022

This article has been updated

Abstract

Rationale

Recently, it was found that cyclosomatostatin-induced catalepsy in middle-aged rats is accompanied by neuronal hypoactivation in the lateral entorhinal cortex (LEntCx); this hypoactivation was reversed by systemic administration of nicotine combined with diphenhydramine. These findings suggest the ability of nicotine to regulate catalepsy and the involvement of the LEntCx in this nicotine effect.

Objectives

The study was aimed to assess whether nicotine alone influences catalepsy when injected into the LEntCx and some other neuroanatomical structures.

Methods

Experiments were conducted with male Wistar rats of 540–560 days of age. Catalepsy was induced by intracerebroventricular injection of cyclosomatostatin and assessed by the standard bar test. Nicotine was injected into the LEntCx, prelimbic cortex (PrCx), or basolateral amygdala (BLA). The tissue levels of tyrosine hydroxylase, dopamine, and DOPAC in the substantia nigra pars compacta and dorsal striatum were measured with use of HPLC and ELISA.

Results

Injections of nicotine into the LEntCx but not into the PrCx and BLA produced anticataleptic effect; the nicotine effect was significantly reversed by intra-LEntCx administration of NMDA and non-NMDA glutamate receptor antagonists. Nicotine also attenuated cataleptogen-induced changes in nigrostriatal dopamine metabolism.

Conclusions

This may be the first demonstration of anticataleptic activity of nicotine. The results show that the effect is mediated by nicotine receptors in the LEntCx, via a glutamatergic mechanism. These findings may help advance the development of novel treatments for extrapyramidal disorders, including parkinsonism.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7

Similar content being viewed by others

Change history

References

Download references

Acknowledgements

I.D.I. is indebted to his long-standing mentors, late Prof. Igor Efimovich Kovalev and late Prof. Lev Aramovich Piruzyan. Technical support of this research by “Timpharm Ltd.” (Moscow, Russia) is highly appreciated.

Funding

The study was supported by the Ministry of Science and Higher Education of the Russian Federation (project AAAA-A18-118012390247–0).

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Ilya D. Ionov.

Ethics declarations

Conflict of interest

The authors declare no competing interests.

Additional information

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Ionov, I.D., Pushinskaya, I.I., Gorev, N.P. et al. Anticataleptic activity of nicotine in rats: involvement of the lateral entorhinal cortex. Psychopharmacology 238, 2471–2483 (2021). https://doi.org/10.1007/s00213-021-05870-3

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00213-021-05870-3

Keywords

Navigation