Chen_Manuscript.pdf (6.04 MB)
Download file

Pro-survival signal inhibition by CDK inhibitor dinaciclib in Chronic Lymphocytic Leukaemia

Download (6.04 MB)
journal contribution
posted on 11.10.2016, 14:58 by Yixiang Chen, Sandra Germano, Chris Clements, Jesvin Samuel, Ghalia Shelmani, Sandrine Jayne, Martin J. S. Dyer, Salvador Macip
Dinaciclib is a cyclin-dependent kinase inhibitor with clinical potential in different cancers, including chronic lymphocytic leukaemia (CLL). In order to better understand its cytotoxic action, we characterized its effects on signalling pathways important for the survival of CLL cells. We found that dinaciclib induced apoptosis through the activation of caspases 8 and 9, which was independent of the presence of cytokines to mimic the environment of proliferation centres or IGVH mutation status. Moreover, treatment with dinaciclib led to the inhibition of oncogenic pathways normally activated in stimulated CLL cells, such as STAT3, NF-κB, p38, PI3K/AKT and RAF/MEK/ERK. Dinaciclib was also able to block the expression of anti-apoptotic proteins of the BCL2 family such as MCL1 and BCL-xL (also termed BCL2L1). Finally, we showed that low concentrations of dinaciclib enhanced cell sensitivity to ibrutinib and the BCL2 inhibitor ABT-199, two drugs with known effects on CLL. Taken together, our data show that dinaciclib targets multiple pro-survival signalling pathways in CLL, which provides a mechanistic explanation for its potent induction of apoptosis. They also support a therapeutic application of cyclin-dependent kinase inhibitors in CLL in combination with other relevant targeted therapies.

History

Citation

British Journal of Haematology, 2016, doi: 10.1111/bjh.14285

Author affiliation

/Organisation/COLLEGE OF MEDICINE, BIOLOGICAL SCIENCES AND PSYCHOLOGY/MBSP Non-Medical Departments/Old Departments Pre 01 Aug 2015/Department of Biochemistry (Pre 01 Aug 2015)

Version

AM (Accepted Manuscript)

Published in

British Journal of Haematology

Publisher

Wiley

issn

0007-1048

eissn

1365-2141

Acceptance date

24/06/2016

Copyright date

2016

Available date

29/07/2017

Publisher version

http://onlinelibrary.wiley.com/wol1/doi/10.1111/bjh.14285/full

Language

en

Usage metrics

Categories

Keywords

Exports