The evolutionary old forebrain as site of action to develop new psychotropic drugs

Anton Jm Loonen, Svetlana A. Ivanova

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

BACKGROUND:: Previously, the authors have developed a model of how reward-seeking and distress- avoiding behaviour is regulated by the human brain. The forebrain's evolution in vertebrates was taken as a starting point. AIMS:: The authors want to inspire colleagues to study in particular the pharmacological effects on the described ancient forebrain structures in order to modify specific symptoms of mental disorders. METHODS:: Compilation of data and ideas of previous articles, with examples to illustrate. RESULTS:: A primary (lamprey-like), secondary (frog-like) and tertiary (mammal-like) forebrain can be distinguished, organized according to a Russian doll model. The first constituent is primarily involved in producing the emotional response, while the last is principally concerned with constructing conscious cognitive behaviour (including verbal and written communication). Mental disorders comprise (partly related and partly unrelated) biological and rational phenomena. The secondary system regulates the intensity of reward-seeking and distress-avoiding behaviour. An essential component of the primary forebrain evaluates the results of behavioural actions: the lateral habenula-projecting pallidum. These neurons regulate the activity of ascending dopaminergic pathways. The authors suggest that these habenula-projecting pallidum neurons are targeted by subanaesthetic dosages of ketamine. The medial habenula is enriched with nicotinergic acetylcholine receptors and regulates the activity of ascending adrenergic and serotonergic neurons. This may link varenicline-induced hostility to selective serotonin reuptake inhibitor-induced aggression. CONCLUSIONS:: Studying the effects of new compounds on the primary and secondary brains in lampreys and frogs may yield interesting new treatments of mental disorders.

Original languageEnglish
Pages (from-to)1277-1285
Number of pages9
JournalJournal of psychopharmacology (Oxford, England)
Volume32
Issue number12
DOIs
Publication statusPublished - 1 Dec 2018

Fingerprint

Psychotropic Drugs
Habenula
Prosencephalon
Mental Disorders
Lampreys
Globus Pallidus
Reward
Anura
Verbal Behavior
Biological Phenomena
Serotonergic Neurons
Neurons
Adrenergic Neurons
Hostility
Serotonin Uptake Inhibitors
Brain
Ketamine
Cholinergic Receptors
Aggression
Vertebrates

Keywords

  • Amygdala
  • GPh
  • habenula
  • ketamine
  • varenicline

ASJC Scopus subject areas

  • Pharmacology
  • Psychiatry and Mental health
  • Pharmacology (medical)

Cite this

The evolutionary old forebrain as site of action to develop new psychotropic drugs. / Loonen, Anton Jm; Ivanova, Svetlana A.

In: Journal of psychopharmacology (Oxford, England), Vol. 32, No. 12, 01.12.2018, p. 1277-1285.

Research output: Contribution to journalArticle

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