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Published on: May 14, 2016

Antitumor activity of a kinesin inhibitor

Roman Sakowicz1, Jeffrey T Finer, Christophe Beraud

  • 1Cytokinetics, Inc., South San Francisco, California 94080, USA.

Cancer Research
|May 6, 2004
PubMed

Insights

A novel KSP inhibitor, CK0106023, effectively halts cancer cell growth by disrupting mitotic spindle formation. This study demonstrates the therapeutic potential of targeting kinesin proteins for cancer treatment.

Area of Science:

  • Molecular biology
  • Cell biology
  • Cancer research

Background:

  • Kinesin motor proteins are crucial for mitotic spindle assembly.
  • Mitotic kinesins are promising targets for antimitotic cancer therapies.

Purpose of the Study:

  • To identify and characterize a novel inhibitor of Kinesin Spindle Protein (KSP).
  • To evaluate the therapeutic potential of KSP inhibition in cancer treatment.

Main Methods:

  • Biochemical assays to determine inhibitor kinetics (Ki).
  • Cell-based assays for mitotic arrest and growth inhibition.
  • In vivo studies in tumor-bearing mice.

Main Results:

  • CK0106023 is a potent, allosteric inhibitor of KSP ATPase (Ki = 12 nM).
  • CK0106023 demonstrated specificity for KSP over other kinesins.
  • In vivo, CK0106023 showed significant antitumor activity and induced monopolar mitotic figures.

Conclusions:

  • Targeting KSP with inhibitors like CK0106023 is a feasible strategy for cancer therapy.
  • KSP inhibition effectively causes mitotic arrest and tumor growth inhibition.

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