Chitinase-like protein YKL-40 serum levels decreased in patients with asthma after they received appropriate inhaled corticosteroid therapy, according to recent study results.

Compared with the patients’ median YKL-40 levels measured at study initiation, decreased YKL-40 levels were observed at follow-up (75.2 ng/mL vs. 54.5 ng/mL; P<.001). The researchers wrote that this decrease was influenced by the dosage of ICS.