Biflavonoids from Araucaria angustifolia protect against DNA UV-induced damage |
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| Authors: | Lydia F Yamaguchi Massuo J Kato |
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| Institution: | a Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil, Cx Postal 26077, CEP 05599-970, Brazil
b Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil, Cx Postal 26077, CEP 05599-970, Brazil |
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| Abstract: | Ultraviolet radiation is one of the most deleterious forms of radiation to terrestrial organisms and is involved in formation of mutagenic pyrimidine dimers and oxidized nucleotides. The biflavonoid fraction (BFF), extracted from needles of Araucaria angustifolia was capable of protecting calf thymus DNA from damage induced by UV radiation. This occurred through prevention of cyclobutane thymine dimer and 8-oxo-7,8-dihydro-2′-deoxyguanosine formation, this being quantified by high-performance liquid chromatography coupled to tandem mass spectrometry (HPLC-MS/MS) in a multiple reaction monitoring mode (MRM) and by HPLC-coulometric detection, respectively. |
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| Keywords: | Araucaria angustifolia Araucariaceae Biflavonoids UV radiation Photoprotection Cyclobutane thymine dimer 8-Oxo-7 8-dihydro-2&prime -deoxyguanosine |
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