Vilanterol-d
4 is intended for use as an internal standard for the quantification of vilanterol by GC- or LC-MS. Vilanterol is a long-acting agonist of the β
2-adrenergic receptor (β
2-AR).
1 It selectively induces cAMP accumulation in CHO cells expressing the β
2-AR over the β
1- and β
3-ARs (EC
50 = 0.4, 398, and 794 nM for the human receptors, respectively). Vilanterol inhibits contractions induced by electrical stimulation in isolated superfused guinea pig trachea strips. It inhibits bronchospasms induced by histamine in guinea pigs when administered
via nebulization (EC
50 = 30 μM). Formulations containing vilanterol, in combination with fluticasone, have been used in the treatment of chronic obstructive pulmonary disease (COPD) and asthma.
