Activity of matrix metalloproteinase 2 and 9 isoforms in sputum samples from individuals infected with M. tuberculosis.

M. tuberculosis stimulates matrix metalloproteinases secretion in the host; however, the patterns of matrix metalloproteinase 9 (MMP-9) and 2 (MMP-2) isoforms are unknown. Therefore, the aim of this study was to evaluate the activities of these isoforms in sputum samples of patients with varying degrees of mycobacterial load.