Analgesic effects of Phα1ß toxin: a review of mechanisms of action involving pain pathways
J. venom. anim. toxins incl. trop. dis
;
27: e20210001, 2021. tab, graf, ilus
Article
in English
| LILACS, VETINDEX
| ID: biblio-1351017
ABSTRACT
Phα1ß is a neurotoxin purified from spider venom that acts as a high-voltage-activated (HVA) calcium channel blocker. This spider peptide has shown a high selectivity for N-type HVA calcium channels (NVACC) and an analgesic effect in several animal models of pain. Its activity was associated with a reduction in calcium transients, glutamate release, and reactive oxygen species production from the spinal cord tissue and dorsal ganglia root (DRG) in rats and mice. It has been reported that intrathecal (i.t.) administration of Phα1ß to treat chronic pain reverted opioid tolerance with a safer profile than ω-conotoxin MVIIA, a highly selective NVACC blocker. Following a recent development of recombinant Phα1ß (CTK 01512-2), a new molecular target, TRPA1, the structural arrangement of disulphide bridges, and an effect on glial plasticity have been identified. CTK 01512-2 reproduced the antinociceptive effects of the native toxin not only after the intrathecal but also after the intravenous administration. Herein, we review the Phα1ß antinociceptive activity in the most relevant pain models and its mechanisms of action, highlighting the impact of CTK 01512-2 synthesis and its potential for multimodal analgesia.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Pain
/
Peptides
/
Reactive Oxygen Species
/
Analgesics
/
Neurotoxins
Language:
English
Journal:
J. venom. anim. toxins incl. trop. dis
Year:
2021
Type:
Article
Institution/Affiliation country:
Federal University of Minas Gerais/BR
/
Federal University of Ouro Preto/BR
/
Federal University of Santa Catarina/BR
/
Institute of Education and Research, Santa Casa de Belo Horizonte/BR
/
State University of Santa Cruz/BR
/
University of the Extreme South of Santa Catarina/BR
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