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https://www.arca.fiocruz.br/handle/icict/40352
PHOTOPROTECTIVE AND TOXICOLOGICAL ACTIVITIES OF EXTRACTS FROM THE ANTARCTIC MOSS SANIONIA UNCINATA
Author
Affilliation
Universidade do Estado do Rio de Janeiro. Instituto de Biologia Roberto Alcântara Gomes. Departamento de Biofísica e Biometria. Rio de Janeiro, RJ, Brasil.
Universidade do Estado do Rio de Janeiro. Instituto de Biologia Roberto Alcântara Gomes. Departamento de Biofísica e Biometria. Rio de Janeiro, RJ, Brasil.
Universidade do Estado do Rio de Janeiro. Instituto de Biologia Roberto Alcântara Gomes. Departamento de Biofísica e Biometria. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto de Tecnologia em Fármacos. Plataforma de Análise Química. Rio de Janeiro, RJ, Brasil.
Universidade do Estado do Rio de Janeiro. Instituto de Biologia Roberto Alcântara Gomes. Departamento de Biofísica e Biometria. Rio de Janeiro, RJ, Brasil.
Universidade do Estado do Rio de Janeiro. Instituto de Biologia Roberto Alcântara Gomes. Departamento de Biofísica e Biometria. Rio de Janeiro, RJ, Brasil.
Universidade do Estado do Rio de Janeiro. Instituto de Biologia Roberto Alcântara Gomes. Departamento de Biofísica e Biometria. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto de Tecnologia em Fármacos. Plataforma de Análise Química. Rio de Janeiro, RJ, Brasil.
Universidade do Estado do Rio de Janeiro. Instituto de Biologia Roberto Alcântara Gomes. Departamento de Biofísica e Biometria. Rio de Janeiro, RJ, Brasil.
Abstract
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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