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

journal contribution
posted on 2023-06-08, 12:49 authored by Helen Stewart, Lyudmila Kishikova, Fiona Powell, Sally Paula Wheatley, Timothy ChevassutTimothy Chevassut
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.

History

Publication status

  • Published

Journal

Experimental Hematology

ISSN

0301-472X

Publisher

Elsevier

Issue

3

Volume

39

Page range

330-338

Department affiliated with

  • Clinical and Experimental Medicine Publications

Research groups affiliated with

  • Haematology Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2012-11-07

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