Task: Answer Verification
Input (English): Question: Does mMP-9 protein level reflect overall MMP activity in the airways of patients with COPD?
Answer: MMP-9 protein but not MMP activity was higher in sputum of COPD patients compared with controls. These results suggest that MMP-9 levels may not reflect the overall MMP activity in the airways of patients with COPD suggesting a complex relationship between MMP-9 protein and activity. Further studies of MMPs in COPD should comprise activity measures in addition to protein levels.
Output (English): no