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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Synthesis, photophysics and photochemistry of phthalocyanine-ε- polylysine conjugates in the presence of metal nanoparticles against Staphylococcus aureus
Journal of Photochemistry and Photobiology A: Chemistry, Volume 233, Year 2012
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Description
This work reports on the photodynamic activity of Zn phthalocyanine-ε- polylysine conjugates in the presence of gold and silver nanoparticles (NPs) towards the inactivation of Staphylococcus aureus (S. aureus). The conjugates showed high photoinactivation with ∼6% growth at a drug dose of 3 μM and fluence of 39.6 mW/cm 2 for 10 min irradiation time in the presence of silver nanoparticles. The presence of silver nanoparticels from the minimal inhibition concentration (MIC 50) studies showed remarkable growth inhibition for the tested conjugates even at low concentrations. The MIC 50 was lowest for the conjugate of 3 with ε-polylysine at concentrations of less than 0.0058 μM in the presence of AgNPs. The lethal photosensitization of microorganisms has emerged as a promising treatment since bacteria have reduced possibilities of developing resistance to photodynamic therapy. © 2012 Elsevier B.V.
Authors & Co-Authors
Nombona, Nolwazi
South Africa, Grahamstown
Rhodes University
Antunes, Edith M.
South Africa, Grahamstown
Rhodes University
Chidawanyika, Wadzanai J.U.
South Africa, Grahamstown
Rhodes University
Kleyi, Phumelele E.
South Africa, Grahamstown
Rhodes University
Tshentu, Zenixole R.
South Africa, Grahamstown
Rhodes University
Nyokong, Tebello
South Africa, Grahamstown
Rhodes University
Statistics
Citations: 44
Authors: 6
Affiliations: 1
Identifiers
Doi:
10.1016/j.jphotochem.2012.02.012