Preference for Glucose over Inositol Headgroup during Lysolipid Activation of G Protein-Coupled Receptor 55
摘要:
G protein-coupled receptor 55 (GPR55) is highly expressed in brain and chemorepulsion peripheral nervous system. Originally deorphanized as a cannabinoid receptor, recently GPRS5 has been described as a lysophospholipid-responsive receptor, specifically toward lysophosphatidylinositol and lysophosphatidyl-beta-n-glucoside (LysoPtdGlc). To characterize lysolipid-GPR55 interaction, synthetic access to LysoPtdGlc and selected analogues was established utilizing a phosphorus(III)-based chemical approach. The biological activity of each synthetic lipid was assessed using a GPR55-dependent chemotropism assay in primary sensory neurons. Combined with molecular dynamics simulations the potential ligand entry port and binding pocket specifics are discussed. These results highlight the preference for gluco- over inositol- and galacto-configured headgroups.
Synthesis and Evaluation of Lysophosphatidylserine Analogues as Inducers of Mast Cell Degranulation. Potent Activities of Lysophosphatidylthreonine and Its 2-Deoxy Derivative
摘要:
In response to various exogenous stimuli, mast cells (MCs) release a wide variety of inflammatory mediators stored in their cytoplasmic granules and this release initiates subsequent allergic reactions. Lysophosphatidylserine (lysoPS) has been known as an exogenous inducer to potentiate histamine release from MCs, though even at submicromolar concentrations. In this study, through SAR studies on lysoPS against MC degranulation, we identified lysoPT, a threonine-containing lysophospholipid and its 2-deoxy derivative as novel strong agonists. LysoPT and its 2-deoxy derivative induced histamine release from MCs both in vitro and in vivo at a concentration less than one-tenth that of lysoPS. Notably, lysoPT did not activate a recently proposed lysoPS receptor on MCs, GPR34, demonstrating the presence of another undefined receptor reactive to both lysoPS and lysoPT that is involved in MC degranulation. Thus, the present strong agonists, lysoPT and its 2-deoxy derivative, will be useful tools to understand the mechanisms of lysoPS-induced activation of degranulation of MCs.
[EN] PHOSPHOLIPID COMPOUNDS AND USES THEREOF<br/>[FR] COMPOSÉS PHOSPHOLIPIDIQUES ET LEURS UTILISATIONS
申请人:GILEAD SCIENCES INC
公开号:WO2022081973A1
公开(公告)日:2022-04-21
Compounds and methods of using said compounds, alone or in combination with additional agents, and pharmaceutical compositions of said compounds for the treatment of viral infections are disclosed.
Synthesis and Evaluation of Lysophosphatidylserine Analogues as Inducers of Mast Cell Degranulation. Potent Activities of Lysophosphatidylthreonine and Its 2-Deoxy Derivative
In response to various exogenous stimuli, mast cells (MCs) release a wide variety of inflammatory mediators stored in their cytoplasmic granules and this release initiates subsequent allergic reactions. Lysophosphatidylserine (lysoPS) has been known as an exogenous inducer to potentiate histamine release from MCs, though even at submicromolar concentrations. In this study, through SAR studies on lysoPS against MC degranulation, we identified lysoPT, a threonine-containing lysophospholipid and its 2-deoxy derivative as novel strong agonists. LysoPT and its 2-deoxy derivative induced histamine release from MCs both in vitro and in vivo at a concentration less than one-tenth that of lysoPS. Notably, lysoPT did not activate a recently proposed lysoPS receptor on MCs, GPR34, demonstrating the presence of another undefined receptor reactive to both lysoPS and lysoPT that is involved in MC degranulation. Thus, the present strong agonists, lysoPT and its 2-deoxy derivative, will be useful tools to understand the mechanisms of lysoPS-induced activation of degranulation of MCs.
PHOSPHOLIPID COMPOUNDS AND USES THEREOF
申请人:Gilead Sciences, Inc.
公开号:US20220143052A1
公开(公告)日:2022-05-12
Compounds and methods of using said compounds, alone or in combination with additional agents, and pharmaceutical compositions of said compounds for the treatment of viral infections are disclosed.
Preference for Glucose over Inositol Headgroup during Lysolipid Activation of G Protein-Coupled Receptor 55
作者:Adam T. Guy、Koki Kano、Jyunpei Ohyama、Hiroyuki Kamiguchi、Yoshio Hirabayashi、Yukishige Ito、Ichiro Matsuo、Peter Greimel
DOI:10.1021/acschemneuro.8b00505
日期:2019.1.16
G protein-coupled receptor 55 (GPR55) is highly expressed in brain and chemorepulsion peripheral nervous system. Originally deorphanized as a cannabinoid receptor, recently GPRS5 has been described as a lysophospholipid-responsive receptor, specifically toward lysophosphatidylinositol and lysophosphatidyl-beta-n-glucoside (LysoPtdGlc). To characterize lysolipid-GPR55 interaction, synthetic access to LysoPtdGlc and selected analogues was established utilizing a phosphorus(III)-based chemical approach. The biological activity of each synthetic lipid was assessed using a GPR55-dependent chemotropism assay in primary sensory neurons. Combined with molecular dynamics simulations the potential ligand entry port and binding pocket specifics are discussed. These results highlight the preference for gluco- over inositol- and galacto-configured headgroups.