Contents
Vol 13, Issue 659
Research Articles
- Airway relaxation mechanisms and structural basis of osthole for improving lung function in asthma
A compound derived from a traditional Chinese medicine targets a phosphodiesterase to induce airway relaxation.
- Kallikrein 13 serves as a priming protease during infection by the human coronavirus HKU1
The protease kallikrein 13 cleaves the spike protein of the human coronavirus HKU1 to facilitate viral entry.
Editors' Choice
- A more rhythmic heartbeat with calcitonin
Cardiomyocyte-released calcitonin acts on fibroblasts to limit atrial fibrosis and arrhythmia.
About The Cover

Online Cover This week features a Research Article that describes how osthole, a compound derived from a traditional Chinese medicine, targets the phosphodiesterase PDE4D to induce airway relaxation. The image shows an asthma inhaler in action. [Image: Jes2u.photo/Shutterstock]