Screening and Identifying of Nephrotoxic Compounds in Lithospermum erythrorhizon Using Live-cell Flu

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In order to identify the potential nephrotoxic compounds in traditional Chinese medicine Lithospermum erythrorhizon,it was separated into serial fractions according to their polarities.An in vitro method was utilized to determine the nephrotoxicity of these fractions with the help of fluorescence image analysis.As a result,the primary fraction A05 and its secondary fractions C06—C09 and C12—C14 were found to have significant toxicity to LLCPK1 cell line,as determined by the survive rate less than 20% after they were treated with these fractions.These potential nephrotoxic fractions were further analyzed by multistage and high resolution mass spectrometry.The main compounds in these fractions were tentatively identified to be acetylshikonin,isobutyrylshikonin,β,β′-dimethylacryloylshikonin,and isovalerylshikonin,which may bring nephrotoxicity.
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