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Systematic metabolite screening identifies functional regulators of the adenosine A2A receptor
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Systematic metabolite screening identifies functional regulators of the adenosine A2A receptor
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Systematic metabolite screening identifies functional regulators of the adenosine A2A receptor
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Journal Article
Systematic metabolite screening identifies functional regulators of the adenosine A2A receptor
2025
Overview
The adenosine A2A receptor (A2AR) is a Class A G protein-coupled receptor (GPCR) that regulates inflammation, glucose metabolism, and energy homeostasis in metabolically active tissues. While the effects of small-molecule ligands and protein interactions with A2AR have been extensively studied, the regulatory influence of endogenous metabolites remains unexplored. To address this gap, we employed the Mass spectrometry Integrated with equilibrium Dialysis for the discovery of Allostery Systematically (MIDAS) platform to screen a library of human metabolites for interactions with A2AR. This approach identified 180 metabolites that interact with A2AR, including allosteric and orthosteric modulators. We characterized the mechanisms of three metabolites previously unreported to interact with A2AR: prostaglandin D2, an allosteric antagonist that fully inhibits receptor signaling, and two orthosteric agonists, S-adenosyl-L-homocysteine and 2′-deoxyadenosine, that fully activate A2AR. Overall, these findings highlight the potential of the MIDAS platform to uncover previously unrecognized metabolite-GPCR interactions for research and therapeutic applications.
The adenosine A2A receptor (A2AR) plays a crucial role in regulating inflammation and metabolism, yet the extent to which endogenous metabolites modulate its activity remains unclear. Here, the authors utilized the MIDAS platform to identify metabolites interacting with A2AR, revealing orthosteric and allosteric modulators.
