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Gi-Coupled Receptor Activation Potentiates Piezo2 Currents via Gβγ

Authors: John Smith Del Rosario; Yevgen Yudin; Songxue Su; Cassandra Hartle; Tooraj Mirshahi; Tibor Rohacs;

Gi-Coupled Receptor Activation Potentiates Piezo2 Currents via Gβγ

Abstract

SUMMARY Dysregulation of mechanosensitive Piezo2 channels is a hallmark of mechanical allodynia, yet the cellular mechanisms that sensitize mechanoreceptors are still poorly understood. Activation of Gi-coupled receptors sensitizes Piezo2 currents, but whether Gi-coupled receptors regulate the activity of Piezo2 channels is not known. Here, we found that activation of Gi-coupled receptors potentiates Piezo2 currents in dorsal root ganglion (DRG) neurons and in heterologous systems, but inhibits Piezo1 currents in heterologous systems. The potentiation, or inhibition of Piezo currents is abolished when blocking Gβγ with the c-terminal domain of the beta-adrenergic kinase (βARKct). Pharmacological inhibition of kinases downstream of Gβγ, phosphoinositide 3-kinase (PI3K) and mitogen-activated protein kinase (MAPK), also abolished the potentiation of Piezo2 currents. Hence, our studies illustrate an indirect mechanism of action of Gβγ to sensitize Piezo2 currents after activation of Gi-coupled receptors.

Keywords

Neurons, Mice, Phosphatidylinositol 3-Kinases, Ganglia, Spinal, Animals, Ion Channels, Receptors, G-Protein-Coupled

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    influence
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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
26
Top 10%
Top 10%
Top 10%
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