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Year : 2015  |  Volume : 11  |  Issue : 41  |  Page : 38-43

Photoprotective and toxicological activities of extracts from the Antarctic moss Sanionia uncinata

1 Department of Biophysics and Biometry, Institute of Biology Roberto Alcantara Gomes, Rio de Janeiro State University, Rio de Janeiro, Brazil
2 Platform of Analytical Chemistry, Farmanguinhos, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil

Correspondence Address:
José Luiz Mazzei
Farmanguinhos, Fundação Oswaldo Cruz, Rua Sizenando Nabuco 100, Manguinhos, 21041-250, Rio de Janeiro, RJ
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0973-1296.149701

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Background: The Antarctic moss Sanionia uncinata (Hedw.) Loeske has shown high ultraviolet (UV)-absorbers content after exposition to high levels of UV-B radiation and can be an important source of antioxidants. Objective: The aim was to investigate photoprotection and mutagenicity by the aqueous extract (AE) and hydroethanolic extract (HE) from the Antarctic moss S. uncinata. Materials and Methods: Photoprotective activities were determined through survival curves of Escherichia coli strains, after UV irradiation in an aqueous solution of thymine and in vitro sun protection factor (SPF). The Salmonella/microsome assays were applied to assess the mutagenicity. Results: Both extracts induced photoprotection against UV-C radiation. The AE showed a higher protection than the hydroethanolic one against UV-induced thymine dimerization. The SPFs were low in both extracts. In association to benzophenone-3 a significant increase in the SPF was detected for the AE, and a significant decrease was induced by the HE. No mutagenicity was found in the both extracts. Furthermore, it was observed absence of cytotoxicity. Conclusion: Water-extractable compounds seem to contribute on photoprotection of this Antarctic moss.

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