β2-Adrenoceptor signalling bias in asthma and COPD and the potential impact on the comorbidities associated with these diseases

Current Opinion in Pharmacology
Maria Gabriella MateraBarbara Rinaldi

Abstract

Inhaled selective β2-agonists are the most widely used treatment for obstructive airway diseases. The classical mechanism of action of these drugs is considered as their ability to activate β2-adrenergic receptors (β2-AR) on airway smooth muscle leading to G-protein activation and subsequent generation of c-AMP causing bronchodilation. However, there is now growing evidence to suggest that binding of β2-agonists to β2-AR is pleotropically coupled to many intracellular pathways whereby depending on the state of the β2-AR when activated, a subset of different intracellular responses can be triggered. This is called biased agonism (or functional selectivity) and this type of activity has now been observed with different types of G protein-coupled receptor (GPCR), not just β2-AR. Accordingly, drug efficacy for many agonists binding to GPCRs can no longer be solely described in terms of a single relationship between binding of a ligand to a receptor and the subsequent magnitude of the cellular response, but is often far more complex reflecting a specific complement of signals following binding of a ligand to its receptor. These differences in responses depending on what state the receptor is in when the ligand binds to it can subseq...Continue Reading

Citations

Feb 12, 2020·The Journal of Experimental Medicine·Elisabeth WieduwildSophie Ugolini
Jul 21, 2020·Expert Opinion on Pharmacotherapy·Timothy E AlbertsonSusan Murin
Oct 23, 2019·Signal Transduction and Targeted Therapy·Seyyed Shamsadin Athari
Dec 19, 2019·Pharmacological Reviews·M G MateraM Cazzola
Dec 25, 2019·European Respiratory Review : an Official Journal of the European Respiratory Society·Mario CazzolaMaria Gabriella Matera
Oct 18, 2020·Signal Transduction and Targeted Therapy·Seyyed Shamsadin Athari
Jul 20, 2021·Phytomedicine : International Journal of Phytotherapy and Phytopharmacology·Fabio MeurerSebastian Franken

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