Photodynamic Activity of Plant Extracts from Sarawak,Borneo |
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Authors: | Wan Wui Jong Pei Jean Tan Fadzly Adzhar Kamarulzaman Michele Mejin Diana Lim Ida Ang Margarita Naming Tiong Chia Yeo Anthony Siong Hock Ho Soo Hwang Teo Hong Boon Lee |
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Affiliation: | 1. Sarawak Biodiversity Centre (SBC), KM 20 Jalan Borneo Heights, Semengoh, Locked Bag No.?3032, 93990 Kuching, Sarawak, Malaysia;2. Cancer Research Initiatives Foundation (CARIF), Sime Darby Medical Centre, 1 Jalan SS12/1A, 47500 Subang Jaya, Selangor Darul Ehsan, Malaysia, (phone: +603‐80251928;3. fax: +603‐80251930);4. School of Biosciences, Taylors University, 1 Jalan Taylors, 47500 Subang Jaya, Selangor Darul Ehsan, Malaysia |
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Abstract: | Photodynamic therapy (PDT) is a medical treatment that involves the irradiation of an administered photosensitizing drug with light of a particular wavelength to activate the photosensitizer to kill abnormal cells. To date, only a small number of photosensitizers have been clinically approved for PDT, and researchers continue to look for new molecules that have more desirable properties for clinical applications. Natural products have long been important sources of pharmaceuticals, and there is a great potential for discovery of novel chemotypes from under‐explored biodiversities in the world. The objective of this study is to mine the terrestrial plants in Sarawak, Borneo Island, for new photosensitizers for PDT. In a screening program from 2004 to 2008, we prepared and studied 2,400 extracts from 888 plants for their photosensitizing activities. This report details the bioprospecting process, preparation and testing of extracts, analysis of the active samples, fractionation of four samples, and isolation and characterization of photosensitizers. |
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Keywords: | Photosensitizers Porphyrins Curcumins Photodynamic therapy |
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