September 2022 "The activation of phospholipase C (PLC) is thought to have a key role in the cardiomyocyte

Here, we provide evidence that distal carboxyl-terminal tail (C-tail), but not proximal, phosphorylation site-directed mutagenesis and bioluminescence resonance energy transfer approaches that distal, not proximal, C-tail In addition, we show that GPCRs that have similarly positioned C-tail phosphoresidues are also able to However, although necessary for some GPCRs, we found that distal C-tail sites might not be sufficient In conclusion, this study provides evidence that distal C-tail phosphorylation sites specify GRK-βarrestin-mediated

October 2022 Coincident Regulation of PLCβ Signaling by Gq-Coupled and μOpioid Receptors Opposes Opioid- Mediated Antinociception "Pain management is a significant problem worldwide. The current frontline approach for pain-management is the use of opioid analgesics. The primary analgesic target of opioids is the μ-opioid receptor (MOR). Deletion of phospholipase Cβ3 (PLCβ3), or selective inhibition of Gβγ regulation of PLCβ3, enhances the potency of the antinociceptive effects of morphine suggesting a novel strategy for achieving opioid sparing effects. Here we investigated a potential mechanism for regulation of PLC signaling downstream of MOR in HEK293 cells and found that MOR alone could not stimulate PLC, but rather required a coincident signal from a Gq coupled receptor. Knockout of PLCβ3, or pharmacological inhibition of its upstream regulators, Gβγ or Gq, ex vivo in periaqueductal gray (PAG) slices increased the potency of the selective MOR agonist DAMGO in inhibiting presynaptic GABA release. Finally, inhibition of Gq-GPCR coupling in mice enhanced the antinociceptive effects of morphine. These data support a model where Gq and Gβγ-dependent signaling cooperatively regulate PLC activation to decrease MOR-dependent antinociceptive potency. Ultimately this could lead to identification of new non-MOR targets that would allow for lower dose utilization of opioid analgesics. " Read more at the source #DrGPCR #GPCR #IndustryNews Subscribe to the Newsletter HERE

Authors Roberta Goncalves Anversa, Maiya L Barron, Leigh C Walker, Andrew J Lawrence Source Contribute

Authors Anna B Halpern , Eduardo Rodríguez-Arbolí , Megan Othus , Kelsey-Leigh A Garcia , Mary-Elizabeth , Pamela S Becker , Jacob S Appelbaum , Janis L Abkowitz , Johnnie J Orozco , Siobán B Keel , Paul C Hendrie , Bart L Scott , M Cristina Ghiuzeli , Elihu H Estey , Roland B Walter Source Contribute to the

< GPCR News < GPCRs in Oncology and Immunology [1,2,4]Triazolo[1,5-c]pyrimidines as Tools to Investigate In this work, a structural investigation on the two position of the [1,2,4]triazolo[1,5-c]pyrimidines adenosine receptor antagonists like the ethyl 2-(4-methoxyphenyl)-5-(methylamino)-[1,2,4]triazolo[1,5-c]