The polo-like kinase inhibitor BI 2536 exhibits potent activity against malignant plasma cells and represents a novel therapy in multiple myeloma

Stewart, Helen J.S., Kishikova, Lyudmila, Powell, Fiona L., Wheatley, Sally P. and Chevassut, Timothy J. (2011) The polo-like kinase inhibitor BI 2536 exhibits potent activity against malignant plasma cells and represents a novel therapy in multiple myeloma. Experimental Hematology, 39 (3). pp. 330-338. ISSN 0301-472X

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Abstract

Objective. Polo-like kinase 1 (Plk1) is a regulator of the cell cycle that has been implicated in the pathology of many cancers. We have investigated whether this kinase plays a role in multiple myeloma (MM) using the Plk1 inhibitor BI 2536.

Materials and Methods. We have used six MM cell lines and six patient-derived samples to determine the effects of the Plk1 inhibitor, BI 2536, on cell viability, apoptosis, and cytokinesis. We have also examined the effect of the microenvironment on these parameters and the effects of BI 2536 in combination with other antimyeloma agents.

Results. We show that MM cell lines and patient samples express PLK1 and that cell death by apoptosis occurs when Plk1 is inhibited. Cells treated with BI 2536 accumulate in the G(2)/M phase of the cell cycle causing endoduplication. The effects of BI 2536 are not abrogated when cells are cultured on extracellular matrix components, in the presence of interleukin-6, or with bone marrow stromal cells.

Conclusions. Plk1 inhibition leads to cell death in MM cell lines and patient myeloma samples. Our data suggest that inhibition of Plk1 may have potential use as a therapeutic strategy in multiple myeloma.

Item Type: Article
Keywords: myeloma, polo-like kinase, Plk1, BI 2536, apoptosis, microenvironment, cancer, cell cycle
Schools and Departments: Brighton and Sussex Medical School > Clinical and Laboratory Investigation
Brighton and Sussex Medical School > Clinical and Experimental Medicine
Subjects: Q Science > QH Natural history > QH0301 Biology
Q Science > QR Microbiology
R Medicine > R Medicine (General)
Depositing User: Helen Stewart
Date Deposited: 18 Aug 2011 14:11
Last Modified: 01 Sep 2017 10:14
URI: http://sro.sussex.ac.uk/id/eprint/7039
Google Scholar:2 Citations
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