Doxycycline as a modulator of inflammation in chronic wounds.

 Doxycycline is a semisynthetic, chemically modified tetracycline compound that is rapidly absorbed and exerts biological effects independent of its antimicrobial activity. One such effect includes the inhibition of matrix metalloproteinases. Doxycycline has a long history as a collagenase inhibitor. This article will describe its mode of action and review its effectiveness in significantly reducing inflammation and elevated levels of proinflammatory cytokines within chronic wounds. .