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• W2415279849 abstract "There are a large number of species of Antarctic lichens, and several studies describing the secondary metabolites present in these lichens, as well as the advances in understanding the chemistry of these metabolites, have been reported. In addition, some derivatives displaying interesting antibacterial effects have been described. The cytotoxic and apoptotic effects of 15 secondary metabolites (depsides, depsidones and usnic acid) obtained from Continental (Chilean) and Antarctic lichens were evaluated in primary cultures of rat hepatocytes. Intracellular lactate dehydrogenase release, caspase 3 activation and DNA fragmentation were measured. In this study, we have evaluated a set of markers associated with pivotal steps in the execution phase of apoptosis, in order to detect compounds with apoptotic effects on hepatocytes before significant necrosis takes place. Flow cytometric analysis of DNA fragmentation revealed an increase in apoptotic nuclei with sub-diploid DNA content after the exposure of hepatocytes to sub-cytotoxic concentrations of the compounds. Among these, salazinic acid, stictic acid and psoromic acid displayed significant apoptotic activities. Divaricatic acid showed only moderate apoptotic effects at sub-cytotoxic concentrations." @default.
• W2415279849 created "2016-06-24" @default.
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• W2415279849 date "2004-12-01" @default.
• W2415279849 modified "2023-10-10" @default.
• W2415279849 title "Cytotoxic and Apoptotic Effects on Hepatocytes of Secondary Metabolites Obtained from Lichens" @default.
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• W2415279849 doi "https://doi.org/10.1177/026119290403200611" @default.
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