(-)-Englerin-A has analgesic and anti-inflammatory effects independent of TRPC4 and 5
File(s)ijms-22-06380.pdf (2.75 MB)
Published version
Author(s)
Type
Journal Article
Abstract
Recently, we found that the deletion of TRPC5 leads to increased inflammation and pain-related behaviour in two animal models of arthritis. (-)-Englerin A (EA), an extract from the East African plant Phyllanthus engleri has been identified as a TRPC4/5 agonist. Here, we studied whether or not EA has any anti-inflammatory and analgesic properties via TRPC4/5 in the carrageenan model of inflammation. We found that EA treatment in CD1 mice inhibited thermal hyperalgesia and mechanical allodynia in a dose-dependent manner. Furthermore, EA significantly reduced the volume of carrageenan-induced paw oedema and the mass of the treated paws. Additionally, in dorsal root ganglion (DRG) neurons cultured from WT 129S1/SvIm mice, EA induced a dose-dependent cobalt uptake that was surprisingly preserved in cultured DRG neurons from 129S1/SvIm TRPC5 KO mice. Likewise, EA-induced anti-inflammatory and analgesic effects were preserved in the carrageenan model in animals lacking TRPC5 expression or in mice treated with TRPC4/5 antagonist ML204.This study demonstrates that while EA activates a sub-population of DRG neurons, it induces a novel TRPC4/5-independent analgesic and anti-inflammatory effect in vivo. Future studies are needed to elucidate the molecular and cellular mechanisms underlying EA’s anti-inflammatory and analgesic effects.
Date Issued
2021-06-15
Date Acceptance
2021-06-11
Citation
International Journal of Molecular Sciences, 2021, 22 (12)
ISSN
1422-0067
Publisher
MDPI AG
Journal / Book Title
International Journal of Molecular Sciences
Volume
22
Issue
12
Copyright Statement
© 2021 by the authors.Licensee MDPI, Basel, Switzerland.This article is an open access articledistributed under the terms andconditions of the Creative CommonsAttribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
License URL
Subjects
Science & Technology
Life Sciences & Biomedicine
Physical Sciences
Biochemistry & Molecular Biology
Chemistry, Multidisciplinary
Chemistry
(-)-Englerin A
TRPC5
TRPC4
carrageenan
inflammation
synovitis
ROOT GANGLION-CELLS
RAT
CHANNEL
IDENTIFICATION
INFLAMMATION
ENGLERIN
NEURONS
ENZYME
POTENT
EDEMA
(-)-Englerin A
TRPC4
TRPC5
carrageenan
inflammation
synovitis
Ganglia, Spinal
Cells, Cultured
Animals
Mice, Knockout
Pain
Hyperalgesia
Disease Models, Animal
Inflammation
Edema
Cobalt
Sesquiterpenes, Guaiane
Carrageenan
Analgesics
Anti-Inflammatory Agents
Behavior, Animal
Phenotype
Male
TRPC Cation Channels
Sensory Receptor Cells
Chemical Physics
0399 Other Chemical Sciences
0604 Genetics
0699 Other Biological Sciences
Publication Status
Published
Article Number
ARTN 6380