Growth Inhibition and Apoptosis Induction by Vincetoxicum pumilum Decne. on HL-60 and K562 Leukemic Cell Lines
| Author | Zahra Tayarani Najaran | en |
| Author | Seyed Hadi Mousavi | en |
| Author | Marzieh Rasoulinejad | en |
| Author | Javad Asili | en |
| Author | Milad Iranshahy | en |
| Author | Seyed Ahmad Emami | en |
| Issued Date | 2016-05-01 | en |
| Abstract | Background: Phenanthroindolizidine alkaloids have been isolated from many species of Vincetoxicum. These alkaloids show promising anti-cancer activity and are a current topic of interest. Objectives: The inhibition of cell viability by different extracts of V. pumilum was measured in vitro in HL-60 and K562 human leukemic cancer cell lines and in freshly-isolated peripheral blood lymphocytes as a normal cell line. Materials and Methods: Using resazurin staining, cell viability was measured. In addition, the presence of apoptotic cells was determined using propidium iodide (PI) staining of DNA fragments (sub-G1 peak). Employing western blot analysis, levels of Bax, Bcl-2, and PARP cleavage were measured. Results: The CH2Cl2 fraction of V. pumilum showed a potent dose-related inhibitory effect on cell viability. The CH2Cl2 fraction showed IC50 values of 8.3 and 12.5 µg/mL in the K562 and HL-60 cell lines, respectively. A sub-G1 peak in the flow cytometry histograms of treated cells induced by the CH2Cl2 fraction suggested an induction of apoptosis. Further, both the parent methanol extract and its CH2Cl2 sub-fraction increased the expression of the pro-apoptotic protein Bax and of cleaved PARP in the cells. Conclusions: Collectively, the V. pumilum extracts showed remarkable cytotoxic activity and merit further investigation as anticancer agents. | en |
| DOI | https://doi.org/10.17795/jjnpp-29370 | en |
| Keyword | Apocynaceae | en |
| Keyword | Cytotoxicity | en |
| Keyword | Leukemic Cell Lines | en |
| Keyword | Apoptosis | en |
| Keyword | <i>Vincetoxicum pumilum</i> | en |
| Publisher | Brieflands | en |
| Title | Growth Inhibition and Apoptosis Induction by Vincetoxicum pumilum Decne. on HL-60 and K562 Leukemic Cell Lines | en |
| Type | Research Article | en |
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