POSTN and chronic obstructive pulmonary disease: An open-label, single-arm, prospective study in 130 stable COPD patients found that high plasma periostin (Adipo Bioscience kit: >23 ng/mL) levels were associated with FEV1 responders (>12% and >200 mL increase in FEV1 from baseline: 43% of responders versus 24% of non-responders, p = 0.027) after 12-week treatment with an ICS/LABA [157].