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Antioxidant activity of polar lichens from King George Island (Antarctica)

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Cited 25 time in scopus
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Antioxidant activity of polar lichens from King George Island (Antarctica)
Other Titles
킹조지섬의 극지지의류로 부터 항산화제 탐색
Bhattarai, Hari Datta
Lee, Jin Sung
Paudel, Babita
Yim, Joung Han
Lee, Jin Sung
Hong, Soon Gyu
Biodiversity & Conservation; Environmental Sciences & Ecology
Antarctica; Antioxidant; lichen
Issue Date
Bhattarai, Hari Datta, et al. 2008. "Antioxidant activity of polar lichens from King George Island (Antarctica)". POLAR BIOLOGY, 1(31): 605-608.
Antioxidant agents prevent reactive oxygen species, which can cause degenerative diseases. Natural antioxidants are preferred over many synthetic antioxidants, which can be toxic, for therapeutic applications. Five lichen species were collected from King George Island, Antarctica. Antioxidant activities as assessed by DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical and ABTS?+ [2,2\\'-azinobis-(3-ethylbenzothiazoline-6-sulfonate)] radical scavenging capacities were determined and compared with those of commercial standards BHA (Butylated hydroxyanisole) and trolox [(?)-6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid]. The results indicated that two lichens exhibited comparatively high antioxidant activities with the remaining three exhibiting less activity. Antioxidant activity was concentration dependent. When compared the antioxidant activity of crude extracts from polar lichens to previously published data for tropical and temperate lichen species, we concluded that lichens from Antarctic origin may be the potent sources of strong antioxidant agents. Such species should be explored as novel sources of effective antioxidant metabolites
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