NewslettersMuscle Cell News Long-Acting β Agonist (LABA) with a Long-Acting Muscarinic Receptor Antagonist (LAMA) Promotes Human Airway Smooth Muscle (HASM) Relaxation and Circumvents β Adrenergic Receptor Tachyphylaxis By Jamie Kang - December 8, 2025 0 56 Scientists hypothesized that LABA/LAMA therapy is more effective in attenuating excitation-contraction coupling compared to either LAMA or LABA alone in human airway smooth muscle cells. [Respiratory Research] Abstract