Antioxidant activity of Sanionia uncinata, a polar moss species from King George Island, Antarctica

Abstract

Antioxidant agents counter reactive oxygen species (ROS) and can be used in cosmetic and medicinal applications. The goal of this study was to evaluate the antioxidant activity of an Antarctic moss species from King George Island (Antarctica), tentatively designated as KSJ-M5. On the basis of morphological characteristics, KSJ-M5 was identified as Sanionia uncinata (Hedw.) Loeske (Amblystegiaceae). The identification was confirmed by comparing the partial sequence of the ITS (internal transcribed spacer) region with that in GenBank. The antioxidant activity of an ethanol extract of KSJ-M5 was evaluated by analyzing its reducing power, superoxide scavenging activity, ABTS [2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid)] cation scavenging activity, and DPPH (1,1-diphenyl-2-picrylhydrazyl) free-radical scavenging activity. The reducing power of 1 mg of KSJ-M5 extract was equivalent to 31.9 +/- 0.9 microg (Mean +/- SD, n = 3) of the commercial standard, BHT (butylated hydroxytoluene). IC(50) values of the KSJ-M5 extract for DPPH free-radical scavenging activity, superoxide scavenging activity, and ABTS cation scavenging activity were found as 356 +/- 26.8 microg/mL, 466.2 +/- 43.4 microg/mL, and 181.3 +/- 12.2 microg/mL, respectively. The total phenolic content in 1 mg of KSJM5 extract was equivalent to 12.7 +/- 2.7 microg of pyrocatechol. These results clearly showed that KSJ-M5 could be an important source of natural antioxidant agents for improved medicinal and cosmetic applications.

Estimation of antioxidant, antimicrobial activity and brine shrimp toxicity of plants collected from Oymyakon region of the Republic of Sakha (Yakutia), Russia

“…To estimate the antioxidant potential of plant extracts, DPPH (1, 1-diphenyl-2-picrylhydrazyl) reducing activity was assayed as described previously [11, 12]. Similarly, antimicrobial activity was assayed by disk diffusion method [13] against human pathogenic microorganisms, Staphylococcus aureus , Escherichia coli , Candida albicans and Aspergillus niger .…”

Antioxidant Activities of Terpenoids from Thuidium tamariscellum (C. Muell.) Bosch. and Sande-Lac. a Moss

“…Hari Datta et al 5 reported Sanionia uncinata a polar moss as an important source of natural antioxidant agents and Boris pejin et al 6 reported the moss Bryum moravicum possess potential antioxidant activity. Similarly, the ethanolic extracts of Atrichum undulatum, Polythrichum formosum (Polytrichaceae) possess stronger antioxidant activity.…”

Antioxidant Activity of Some Mongolian Plants

“…But natural antioxidants, especially phenolics and fl avonoids from tea, wine, fruits, vegetables and spices are already exploited commercially either as antioxidant additives or as nutritional supplements. Also many other plant species have been investigated in the search for novel antioxidants (Koleva et al, 2002;Mantle et al, 2000;Oke & Hamburger, 2002;Bhattarai et al, 2008), but generally there is still a demand to fi nd more information concerning the antioxidant potential of plant species as they are safe and also bioactive.…”