Analysis of the CDKI-73 (CDKI73) and fludarabine (FLUDARA)-regulated transcriptomes in human primary chronic lymphocytic leukemia (CLL) cells

Author(s):  
C Pepper

2010 ◽  
Vol 70 (19) ◽  
pp. 7523-7533 ◽  
Author(s):  
Andrea G.S. Buggins ◽  
Chris Pepper ◽  
Piers E.M. Patten ◽  
Saman Hewamana ◽  
Satyen Gohil ◽  
...  






Haematologica ◽  
2010 ◽  
Vol 95 (3) ◽  
pp. 514-517 ◽  
Author(s):  
L. Pearce ◽  
L. Morgan ◽  
T. T. Lin ◽  
S. Hewamana ◽  
R. J. Matthews ◽  
...  


Blood ◽  
2014 ◽  
Vol 123 (24) ◽  
pp. 3780-3789 ◽  
Author(s):  
Amal A. El-Mabhouh ◽  
Mary L. Ayres ◽  
Elizabeth J. Shpall ◽  
Veerabhadran Baladandayuthapani ◽  
Michael J. Keating ◽  
...  

Key Points The fludarabine and bendamustine combination is cytotoxic to CLL cells even in the presence of a protective microenvironment. H2AX activation was maximum with the combination, and unscheduled DNA synthesis induced by bendamustine was blocked by fludarabine.





2005 ◽  
Vol 13 (2) ◽  
pp. 215-224 ◽  
Author(s):  
L H Li ◽  
E Biagi ◽  
C Allen ◽  
R Shivakumar ◽  
J M Weiss ◽  
...  


2015 ◽  
Vol 7 (4) ◽  
Author(s):  
Romain Guièze ◽  
Emmanuel Gyan ◽  
Olivier Tournilhac ◽  
Christelle Halty ◽  
Richard Veyrat-Masson ◽  
...  

Chronic lymphocytic leukemia is an indolent disorder with an increased infectious risk remaining one of the main causes of death. Development of therapies with higher safety profile is thus a challenging issue. Docosahexaenoic acid (DHA, 22:6) is an omega-3 fatty acid, a natural compound of normal cells, and has been shown to display antitumor potency in cancer. We evaluated the potential <em>in</em> <em>vitro</em> effect of DHA in primary CLL cells. DHA induces high level of <em>in</em> <em>vitro</em> apoptosis compared to oleic acid in a dose-dependent and time-dependent manner. Estimation of IC50 was only of 4.813 μM, which appears lower than those reported in solid cancers. DHA is highly active on CLL cells <em>in vitro.</em> This observation provides a rationale for further studies aiming to understand its mechanisms of action and its potent <em>in vivo</em> activity.



Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 2810-2810
Author(s):  
Albert F. Kabore ◽  
Kristin McCrea ◽  
James B. Johnston ◽  
Spencer B. Gibson

Abstract The proteasome inhibitor, bortezomib has recently emerged as a new therapeutic treatment for refractory multiple myeloma and is presently being evaluated for other hematological malignancies either alone or in combination with other antitumor agents. Proteasome inhibitors cause the accumulation of many proteins but the precise mechanism responsible for their antitumor effect is unclear. In the present study, we have determined that cytotoxic effect the proteasome inhibitor MG-132 in primary chronic lymphocytic leukemia (CLL) cells is through the activation of the TRAIL (tumor necrosis factor-related apoptosis inducing ligand) apoptotic pathway. MG-132 induced apoptosis in approximately 70% of primary CLL cells as measured by annexin V staining. Addition of DR4:Fc that prevents TRAIL ligation with its receptors decreased the amount of MG-132 induced apoptosis by approximately 40% suggesting MG-132 caused activation of the TRAIL apoptotic pathway. MG-132 also up-regulated both the mRNA and protein levels of TRAIL and protein levels of TRAIL receptors DR4 and DR5. This upregulation correlated with activation of caspase 8 and cleavage of pro-apoptotic Bcl-2 family member Bid. Moreover, MG-132 treatment also induced a substantial reduction in the FLICE-like inhibitory protein (c-FLIP) protein levels. In contrast to CLL cells, proteasome inhibitors failed to activate the TRAIL apoptotic pathway in normal B-cells. This indicates that proteasome inhibitors are inducing apoptosis in primary CLL cells through activation of the TRAIL apoptotic signaling pathway through up-regulation of TRAIL and its cognate receptors and reduced FLIP expression. Thus, proteasome inhibitors may have a therapeutic role in CLL, either when used alone or in combination with TRAIL or antibodies against DR4/DR5.



Sign in / Sign up

Export Citation Format

Share Document