Bacterial protease inhibitors

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Abstract
Serine-, cysteine-, and metalloproteases are widely spread in many pathogenic bacteria, where they play critical functions related to colonization and evasion of host immune defenses, acquisition of nutrients for growth and proliferation, facilitation of dissemination, or tissue damage during infection. Since all the antibiotics used clinically at the moment share a common mechanism of action, acting as inhibitors of the bacterial cell wall biosynthesis or affecting protein synthesis on ribosomes, resistance to these pharmacological agents represents a serious medical problem, which might be resolved by using new generation of antibiotics, possessing a different mechanism of action. Bacterial protease inhibitors constitute an interesting such possibility, due to the fact that many specific as well as ubiquitous proteases have recently been characterized in some detail in both gram-positive as well as gram-negative pathogens. Few potent, specific inhibitors for such bacterial proteases have been reported at this moment except for some signal peptidase, clostripain, Clostridium histolyticum collagenase, botulinum neurotoxin, and tetanus neurotoxin inhibitors. No inhibitors of the critically important and ubiquitous AAA proteases, degP or sortase have been reported, although such compounds would presumably constitute a new class of highly effective antibiotics. This review presents the state of the art in the design of such enzyme inhibitors with potential therapeutic applications, as well as recent advances in the use of some of these proteases in therapy. © 2002 Wiley Periodicals, Inc. Med Res Rev, 22, No. 4, 329–372, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/med.10007

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