Fenoterol hydrobromide

Fenoterol hydrobromide (CAS No.: 1944-12-3) is a synthetic small molecule sympathomimetic and the hydrobromide salt form of fenoterol, broadly categorized in pharmacological research as a selective beta2 adrenoceptor agonist and functional bronchodilator tool compound for respiratory and cardiovascular biology studies. In biomedical research settings, it is primarily used to interrogate beta adrenergic signaling, where receptor activation is coupled to Gs protein mediated stimulation of adenylyl cyclase, elevation of intracellular cyclic AMP, and downstream modulation of protein kinase A dependent pathways that regulate smooth muscle tone, cellular excitability, and stimulus responsive gene programs. Reported activity for beta2 adrenoceptor agonists of this class is generally observed from nanomolar to micromolar concentration ranges depending on receptor expression, assay format, and species background, and experimental interpretation commonly includes selectivity profiling against other adrenergic receptor subtypes to define pathway bias and off target pharmacology. Typical applications include receptor binding and second messenger assays in engineered or endogenous beta2 expressing cell systems, mechanistic studies of airway or vascular smooth muscle responses in ex vivo preparations, and in vivo pharmacology models designed to evaluate adrenergic pathway modulation under controlled experimental conditions, while the concentrations or doses used in experiments typically depend on specific experimental designs and research objectives. This reagent is intended for laboratory research use in target validation, pathway mapping, and compound benchmarking workflows in drug discovery and translational biology platforms.