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Recent Patents on Anti-Infective Drug Discovery
ISSN (Print): 1574-891X
ISSN (Online): 2212-4071
VOLUME: 8
ISSUE: 2
DOI: 10.2174/1574891X113089990013      Price:  $100









Special Features of Gram-Positive Bacterial Eradication by Photosensitizers

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Author(s): Yeshayahu Nitzan and Marina Nisnevitch
Pages 88-99 (12)
Abstract:
Antibiotic resistance of pathogenic bacteria is a major concern and presents a special challenge for development of alternative antibacterial modalities. One of these alternative approaches is based on using the photodynamic therapy (PDT) for eradicating bacteria. Photosensitizer-induced PDT exhibits unique properties and demonstrates efficient microbe-killing effects. The efficient and irreversible antimicrobial effects of PDT are not dependent on the antibiotic susceptibility of the pathogenic bacteria to antibiotics. Gram-positive bacteria exhibit efficient binding of the photosensitizer to the bacterial barriers, leading to immediate photoinactivation of the bacteria. Photoinactivation of Gram-positive bacteria by various photosensitizers has become a high priority, since these bacteria are responsible for life-threatening infections in humans, especially in the elderly and in compromised hosts in whom they cause hospital-acquired infections. The present review concentrates on the photoinactivation of Staphylococi, Streptococci, Propionibacterium acnes, Deinococcus radiodurans, aerobic spore-forming Bacilli by various photosensitizers and by various methods described in numerous works and patents.
Keywords:
Gram-positive bacteria, patents, photodynamic inactivation, photosensitizers.
Affiliation:
Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.