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Pharmacol Ther. 2008 Jun;118(3):359-71. doi: 10.1016/j.pharmthera.2008.03.004. Epub 2008 Apr 8.

G protein-coupled receptor dimers: functional consequences, disease states and drug targets.

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Laboratory for Molecular Endocrinology - GPCRs, Western Australian Institute for Medical Research and Centre for Medical Research, University of Western Australia, Nedlands, Perth, WA 6009, Australia.


With an ever-expanding need for reliable therapeutic agents that are highly effective and exhibit minimal deleterious side effects, a greater understanding of the mechanisms underlying G protein-coupled receptor (GPCR) regulation is fundamental. GPCRs comprise more than 30% of all therapeutic drug targets and it is likely that this will only increase as more orphan GPCRs are identified. The past decade has seen a dramatic shift in the prevailing concept of how GPCRs function, in particular the growing acceptance that GPCRs are capable of interacting with one another at a molecular level to form complexes, with significantly different pharmacological properties to their monomeric selves. While the ability of like-receptors to associate and form homodimers raises some interesting mechanistic issues, the possibility that unlike-receptors could heterodimerise in certain tissue types, producing a functionally unique signalling complex that binds specific ligands, provides an invaluable opportunity to refine and redefine pharmacological interventions with greater specificity and efficacy.

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