Crying or even laughing may bring on an attack. Severe episodes, which are less common, may be seen when the patient has a viral respiratory tract infection or is exposed to a heavy load of an allergen or irritant. Asthmatic attacks may last only a few minutes or can go on for hours ...
The growth factor amphiregulin (AREG) was also studied as this ligand of the epidermal growth factor receptor plays a pivotal role in the repair and maintenance of epithelial tissues [32], but it is also overexpressed in asthmatic subjects during crisis [33]. Previous studies at the laboratory...
Asthma is classified based on the degree of symptom severity, which can be divided into four categories: mild intermittent, mild persistent, moderate persistent, and severe persistent. Although the mechanisms underlying an asthmatic episode are not fully understood, in general it is known that exposu...