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Int. J. Mol. Sci. 2011, 12(12), 8645-8660; doi:10.3390/ijms12128645
Article

Effects of Newcastle Disease Virus Strains AF2240 and V4-UPM on Cytolysis and Apoptosis of Leukemia Cell Lines

1,2,3,* , 1
, 1
, 4,5
, 4
, 4
 and 1,*
1 Department of Biotechnology, Faculty of Agriculture and Biotechnology, University Sultan Zainal Abidin (UniSZA), Terengganu 20400, Malaysia 2 Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia (UPM), Serdang 43300, Malaysia 3 Faculty of Dentistry, University of Malaya (UM), Kuala Lumpur, 50603, Malaysia 4 Faculty of Veterinary Medicine, University Putra Malaysia (UPM), Serdang 43300, Malaysia 5 Institute of Bioscience, University Putra Malaysia (UPM), Serdang 43300, Malaysia
* Authors to whom correspondence should be addressed.
Received: 14 September 2011 / Revised: 14 November 2011 / Accepted: 15 November 2011 / Published: 30 November 2011
(This article belongs to the Section Bioinorganic Chemistry)
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Abstract

Newcastle disease virus (NDV) is used as an antineoplastic agent in clinical tumor therapy. It has prompted much interest as an anticancer agent because it can replicate up to 10,000 times better in human cancer cells than in most normal cells. This study was carried out to determine the oncolytic potential of NDV strain AF2240 and V4-UPM on WEHI-3B leukemia cell line. Results from MTT cytotoxicity assay showed that the CD50 values for both strains were 2 and 8 HAU for AF2240 and V4-UPM, respectively. In addition, bromodeoxyuridine (BrdU) and trypan blue dye exclusion assays showed inhibition in cell proliferation after different periods. Increase in the cellular level of caspase-3 and detection of DNA laddering using agarose gel electrophoresis on treated cells with NDV confirmed that the mode of cell death was apoptosis. In addition, flow-cytometry analysis of cellular DNA content showed that the virus caused an increase in the sub-G1 region (apoptosis peaks). In conclusion, NDV strains AF2240 and V4-UPM caused cytolytic effects against WEHI-3B leukemic cell line.
Keywords: NDV; cytolytic; apoptosis; flow-cytometry; leukemia NDV; cytolytic; apoptosis; flow-cytometry; leukemia
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Alabsi, A.M.; Bakar, S.A.A.; Ali, R.; Omar, A.R.; Bejo, M.H.; Ideris, A.; Ali, A.M. Effects of Newcastle Disease Virus Strains AF2240 and V4-UPM on Cytolysis and Apoptosis of Leukemia Cell Lines. Int. J. Mol. Sci. 2011, 12, 8645-8660.

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