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      저자 : Auxillia Machingauta (검색결과 1 건)
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        Evaluation of the antiproliferative effect of β-sitosterol isolated from Combretum platypetalum Welw. ex M.A. Lawson (Combretaceae) on Jurkat-T cells and protection by glutathione

        Auxillia Machingauta,Marc Y. Stevens,Chi Godloves Fru,Simbarashe Sithole,Samuel Yeboah,Stanley Mukanganyama 경희대학교 융합한의과학연구소 2022 Oriental Pharmacy and Experimental Medicine Vol.22 No.4

        Combretum species are distributed widely in Southern Africa and are known for their medicinal properties. The species have potential as sources of anticancer agents. Combrestanin-A4 isolated from Combretum caffrum is one of the pure compounds now under clinical trials. The aim of this study was to fractionate and isolate plant phytoconstituents of C. platypetalum and determine their antiproliferative effects on a human leukemic cancer cell line, Jurkat-T cells. Dried powdered leaf plant samples were extracted serially with hexane, DCM, acetone, ethyl acetate, ethanol, methanol, and water. The total combined extracts were run on a silica gel column using a mobile phase of increasing polarity. β-Sitosterol was isolated from pool 94–98 of the fractions and identified by 1H-NMR and 13C-NMR and its molecular formula confirmed by mass spectrometry. The effects of β-sitosterol on proliferation of cells, effect of combining β-sitosterol and glutathione, effect of combining β-sitosterol and camptothecin and effect of β-sitosterol on glutathione S-transferase activity were determined. β-sitosterol showed dose-dependent antiproliferative effects against Jurkat-T cells and these effects were shown to be irreversible. Reduced glutathione protected the cells from the effects of β-sitosterol. Enhance antiproliferative effects were observed when β-sitosterol was combined with camptothecin. β-sitosterol was also shown to inhibit the activity of glutathione S-transferases in the cancer cell line. The results of the study suggested that β-sitosterol has antiproliferative effects in the Jurkat-T cells. Further work needs to be done on normal cells to determine if β-sitosterol affects cancer cells only.

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