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Photodynamic Activity of Plant Extracts from Sarawak, Borneo
Author(s) -
Jong Wan Wui,
Tan Pei Jean,
Kamarulzaman Fadzly Adzhar,
Mejin Michele,
Lim Diana,
Ang Ida,
Naming Margarita,
Yeo Tiong Chia,
Ho Anthony Siong Hock,
Teo Soo Hwang,
Lee Hong Boon
Publication year - 2013
Publication title -
chemistry and biodiversity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 70
eISSN - 1612-1880
pISSN - 1612-1872
DOI - 10.1002/cbdv.201200303
Subject(s) - photosensitizer , photodynamic therapy , bioprospecting , chemistry , drug discovery , botany , biochemistry , photochemistry , biology , organic chemistry
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.