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Photodynamic antimicrobial activity of hypocrellin A

Paper ID Volume ID Publish Year Pages File Format Full-Text
30950 44520 2011 6 PDF Available
Photodynamic antimicrobial activity of hypocrellin A

Antimicrobial photodynamic therapy is a recently developed therapeutic option that combines a non-toxic photosensitizer with harmless visible light to damage the microbial cell. Hypocrellin A (HA), a natural occurring lipid-soluble perylenequinone pigment, has gained considerable interest since its anticancer and antiviral activities have been reported. Here, we examined the antimicrobial activity of HA against Gram-positive (Staphylococcus aureus, Bacillus subtilis) and Gram-negative bacteria (Escherichia coli, Salmonella typhimurium). The results indicate that HA has a photodynamic antimicrobial activity against both Gram-positive and Gram-negative bacteria when CaCl2 or MgCl2 was employed. A loose binding has been established between HA and the organisms. Molecular oxygen is significantly involved in the photodynamic action of HA. Furthermore, HA maintains a photodynamic activity in terms of both types I and II reactions. Our results confirm the potential of HA to be used as a photosensitizer in antimicrobial photodynamic therapy.

Hypocrellin A; Photosensitizer; Photodynamic antimicrobial activity
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Photodynamic antimicrobial activity of hypocrellin A
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 103, Issue 1, 4 April 2011, Pages 29–34
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Physical Sciences and Engineering Chemical Engineering Bioengineering