Realising the therapeutic potential of neuroactive steroid modulators of the GABAA receptor

Delia Belelli, Derk Hogenkamp, Kelvin W. Gee, Jeremy J. Lambert (Lead / Corresponding author)

Research output: Contribution to journalArticle

55 Downloads (Pure)

Abstract

In the 1980s particular endogenous metabolites of progesterone and of deoxycorticosterone were revealed to be potent, efficacious, positive allosteric modulators (PAMs) of the GABAA receptor (GABAAR). These reports were followed by the discovery that such steroids may be synthesised not only in peripheral endocrine glands, but locally in the central nervous system (CNS), to potentially act as paracrine, or autocrine “neurosteroid” messengers, thereby fine tuning neuronal inhibition. These discoveries triggered enthusiasm to elucidate the physiological role of such neurosteroids and explore whether their levels may be perturbed in particular psychiatric and neurological disorders. In preclinical studies the GABAAR-active steroids were shown to exhibit anxiolytic, anticonvulsant, analgesic and sedative properties and at relatively high doses to induce a state of general anaesthesia. Collectively, these findings encouraged efforts to investigate the therapeutic potential of neurosteroids and related synthetic analogues. However, following over 30 years of investigation, realising their possible medical potential has proved challenging. The recent FDA approval for the natural neurosteroid allopregnanolone (brexanolone) to treat postpartum depression (PPD) should trigger renewed enthusiasm for neurosteroid research. Here we focus on the influence of neuroactive steroids on GABA-ergic signalling and on the challenges faced in developing such steroids as anaesthetics, sedatives, analgesics, anticonvulsants, antidepressants and as treatments for neurodegenerative disorders.

Original languageEnglish
Article number100207
Pages (from-to)1-11
Number of pages11
JournalNeurobiology of Stress
Volume12
Early online date23 Dec 2019
DOIs
Publication statusPublished - May 2020

Keywords

  • Allopregnanolone
  • GABA receptor
  • Neurosteroid
  • Phasic inhibition
  • Tonic inhibition

Fingerprint Dive into the research topics of 'Realising the therapeutic potential of neuroactive steroid modulators of the GABA<sub>A</sub> receptor'. Together they form a unique fingerprint.

  • Cite this