Cycloheximide-induced apoptosis in Burkitt lymphoma (BJA-B) cells with and without Epstein-Barr virus infection

Ishii, H. H., Etheridge, M. R. and Gobe, G. C. (1995) Cycloheximide-induced apoptosis in Burkitt lymphoma (BJA-B) cells with and without Epstein-Barr virus infection. Immunology and Cell Biology, 73 5: 463-468. doi:10.1038/icb.1995.72


Author Ishii, H. H.
Etheridge, M. R.
Gobe, G. C.
Title Cycloheximide-induced apoptosis in Burkitt lymphoma (BJA-B) cells with and without Epstein-Barr virus infection
Journal name Immunology and Cell Biology   Check publisher's open access policy
ISSN 0818-9641
Publication date 1995-10
Sub-type Article (original research)
DOI 10.1038/icb.1995.72
Volume 73
Issue 5
Start page 463
End page 468
Total pages 6
Place of publication London, United Kingdom
Publisher Nature
Language eng
Formatted abstract
Epstein-Barr virus (EBV) has been shown, in many instances, to protect B cells from apoptosis via expression of select EBV proteins and up-regulation of bcl-2 or its homologues. However, at present little is known about the influence of EBV infection against-cancer therapy-induced apoptosis in EBV-associated cancers. Many anti-cancer treatments act via inhibition of protein synthesis and so could influence the reported protein-dependent mechanisms involved in EBV inhibition of apoptosis. In the present study, Burkitt lymphoma (BJA-B) cells were treated with a potent protein synthesis inhibitor, cycloheximide (CHX). Two variants of BJA-B cells were used, one with EBV infection (EBV(+)), and one free of infection (EBV(-)). Cells were collected 0, 3, 6, 12, 24 and 48 h after addition of either 1 or 50 μg/mL of CHX. Control cultures were untreated. Apoptosis was quantified using established morphological and biochemical characteristics, and protein concentrations assessed. CHX treatment of EBV(-) BJA-B cells induced massive levels of apoptosis. Apoptosis was inhibited, but remained significantly higher than that found in control cultures, in similarly treated EBV(+) cells. The study demonstrates that induction of apoptosis in EBV(-) and EBV(+) cells is not dependent on new protein synthesis, and may be caused by removal of a 'cell survival' protein. In addition, the reduction in CHX-induced apoptosis in the EBV(+) cells, when compared with similarly treated EBV(-) cells, is not dependent on new protein synthesis and so may be indicative of a bcl-2 independent mechanism in this instance. The results have important implications for devising and assessing treatment of EBV-associated malignancies.
Keyword Apoptosis
Burkitt lymphoma
Cycloheximide
Epstein-Barr virus
Proteins
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Medicine Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 17 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 15 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 09 Mar 2011, 08:33:29 EST