Description
Monastrol (254753-54-3) is a potent, cell-permeable, small molecule inhibitor of mitosis. Monastrol-arrested cells are characterized by monopolar spindles.1Does not affect other motor proteins or tubulin. Specifically inhibits the mitotic molecular motor kinesin Eg5, a motor protein required for spindle formation (IC50= 14 μM).2Mimics the effect of amyloid β on long term potentiation in a cellular model of learning and memory.3Enhances regeneration of adult axons.4
Chemical Properties
Crystalline Solid
Uses
Monastrol has been used:
- to treat MDA-MB-231 cells as a non-microtubule-targeting agent
- as a antineoplastic agent, to treat mouse myeloma cell line SP 2/0, to induce apoptosis and to elucidate the role of metabotropic glutamate receptor 3 (Grm3) in apoptosis
- as an inhibitor of pteridine reductase in GFP-transfected promastigotes infected macrophages for flow cytometer-based growth inhibition assay and to evaluate anti-leishmanial activity of Leishmania donovani hamster model in vivo
Uses
A cell-permeablesmall molecule inhibitor of the mitotic kinesin, Eg5, arrests cells in mitosis with monoastral spindles
Uses
Inhibitor of mammalian cell mitosis.
Definition
ChEBI: Monastrol is a racemate comprising equimolar amounts of R- and S-monastrol. It has a role as an antineoplastic agent, an EC 3.5.1.5 (urease) inhibitor, an antileishmanial agent and an antimitotic. It contains a (R)-monastrol and a (S)-monastrol.
Biological Activity
Potent, cell-permeable, small molecule mitosis inhibitor that does not interact with tubulin. Arrests cells in mitosis and specifically inhibits the motility of the mitotic kinesin Eg5, a motor protein required for mitotic spindle formation and maintenance (IC 50 = 14 μ M).
Biochem/physiol Actions
Monastrol is a potent, cell-permeant inhibitor of mitosis. Monastrol arrested cells are characterized by monopolar spindles. This phenotype is induced through specific disruption of mitotic molecular motor kinesin Eg5 with IC50 at 14 μM. No effect on other motor proteins and tubulin.
References
[1] MAKOTO KINOSHITA Naoki W. [Small molecule inhibitor of mitotic spindle bipolarity identified in a phenotype-based screen].[J]. Tanpakushitsu kakusan koso. Protein, nucleic acid, enzyme, 2007, 52 13 Suppl: 1796-1799.
[2] T M KAPOOR. Probing spindle assembly mechanisms with monastrol, a small molecule inhibitor of the mitotic kinesin, Eg5.[J]. Journal of Cell Biology, 2000, 150 5: 975-988. DOI:
10.1083/jcb.150.5.975[3] CSILLA ARI . Alzheimer amyloid beta inhibition of Eg5/kinesin 5 reduces neurotrophin and/or transmitter receptor function[J]. Neurobiology of Aging, 2014, 35 8: Pages 1839-1849. DOI:
10.1016/j.neurobiolaging.2014.02.006[4] SHEN LIN. Inhibition of Kinesin-5, a microtubule-based motor protein, as a strategy for enhancing regeneration of adult axons.[J]. Traffic (Copenhagen, Denmark), 2011: 269-286. DOI:
10.1111/j.1600-0854.2010.01152.x
