| ORIGINAL ARTICLE |
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| Year : 2015 | Volume
: 11
| Issue : 41 | Page : 38-43 |
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Photoprotective and toxicological activities of extracts from the Antarctic moss Sanionia uncinata
Andréia da Silva Fernandes1, Alexandre Santos Alencar1, Heitor Evangelista1, José Luiz Mazzei2, Israel Felzenszwalb1
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
Brazil
 Source of Support: None, Conflict of Interest: None  | Check |
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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