Abstract
This work was aimed to prepare, isolate and identify antioxidant and cytotoxic compound from the culture filtrate of a probiotic lactobacillus strain. New compound, plantarone (1), together with two known compounds, kojic acid (2) and methyl dodecanoate (3), were isolated from the ethyl acetate extract of the culture filtrate of probiotic Lactobacillus plantarum H24. Their structures were elucidated using spectroscopic methods including 2 D NMR, HRMS analyses. Isolated compounds were screened for antioxidant and cytotoxic activities against Caco-2 colon cancer cells. Compounds 1 and 2 showed lowers DPPH radical scavenging activities (p < 0.05) with IC50 values of 66.3 ± 0.34 μM and 50.2 ± 0.28 μM respectively, compared to standard butylated hydroxyanisole (BHA: IC50 = 44.2 ± 0.24 μM). Whereas only compound 1 showed a good cytotoxicity activity with inhibition value of 60.72 ± 3.55%. Accordingly, L. plantarum H24 could be used to prevent oxidative stress and its injuries, improving human health.
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