[A highly selective, long-acting beta2-adrenergic agonist with bronchodilatory activity. Salmeterol's benzene moiety resembles the structure of catecholamines, and occupies the active site of beta2-adrenergic receptor, while the long, lipophilic side chain of salmeterol, binds to the so called 'exosite' near the beta2-receptors. The binding at the exosite allows the active portion of the molecule to remain at the receptor site and continually engage and disengage with the receptor, therefore providing a long duration of action. This agent stimulates intracellular adenyl cyclase to catalyze the conversion of adenosine triphosphate to cyclic-3',5'-adenosine monophosphate (cAMP). Increased cAMP levels result in relaxation of bronchiolar smooth muscle, bronchodilation and increased bronchial airflow. ( NCI )]
UMLS (NCI) C0073992 - Organic Chemical
- Pharmacologic Substance
Relation/PAR: albuterol
[RE102] BRONCHODILATORS, SYMPATHOMIMETIC,INHALATION
Relation/CHD: Salmeterol Xinafoate