New Publication Highlight:
Orzeล U, Barreto CAV, Filipek S, Moreira IS
GPCR Oligomerization Across Classes: A2AR-Mediated Regulation of mGlu5R Activation
International Journal of Biological Macromolecules, 2025
DOI: 10.1016/j.ijbiomac.2025.139880
Scientific context and key findings
G proteinโcoupled receptors (GPCRs) do not function solely as isolated monomers. Increasing evidence shows that oligomerization across GPCR classes can profoundly reshape receptor activation, signaling bias, and pharmacological response.
In this study, we dissect the cross-class interaction between the adenosine A2A receptor (A2AR) and the metabotropic glutamate receptor 5 (mGlu5R), demonstrating how A2AR oligomerization modulates mGlu5R activation at a mechanistic level.
Key contributions include:
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Structural and mechanistic characterization of A2ARโmGlu5R oligomerization
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Evidence for allosteric regulation across GPCR classes, linking receptorโreceptor interactions to functional outcomes
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Implications for signal integration in the CNS, where A2AR and mGlu5R co-expression is physiologically and pathologically relevant
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Relevance for drug discovery, highlighting oligomer-aware strategies to improve selectivity and reduce off-target effects
Rather than treating GPCRs as independent signaling units, this work positions oligomerization as an active regulatory layer in receptor biology.
Impact and outlook
By bridging structural biology and receptor pharmacology, this article advances our understanding of GPCR network behavior and opens new avenues for polypharmacological and context-dependent therapeutic strategies, particularly in neurological and neuropsychiatric disorders.
๐ Read the full article:
https://doi.org/10.1016/j.ijbiomac.2025.139880
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