Rigosertib (ON-01910)

For research use only.

Catalog No.S1362

25 publications

Rigosertib (ON-01910) Chemical Structure

CAS No. 1225497-78-8

Rigosertib (ON-01910) is a non-ATP-competitive inhibitor of PLK1 with IC50 of 9 nM in a cell-free assay. It shows 30-fold greater selectivity against Plk2 and no activity to Plk3. Rigosertib inhibits PI3K/Akt pathway and activates oxidative stress signals. Rigosertib induces apoptosis in various cancer cells. Phase 3.

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Selleck's Rigosertib (ON-01910) has been cited by 25 publications

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Biological Activity

Description Rigosertib (ON-01910) is a non-ATP-competitive inhibitor of PLK1 with IC50 of 9 nM in a cell-free assay. It shows 30-fold greater selectivity against Plk2 and no activity to Plk3. Rigosertib inhibits PI3K/Akt pathway and activates oxidative stress signals. Rigosertib induces apoptosis in various cancer cells. Phase 3.
PLK1 [1]
(Cell-free assay)
(Cell-free assay)
Bcr-Abl [1]
(Cell-free assay)
Flt1 [1]
(Cell-free assay)
Src [1]
(Cell-free assay)
9 nM 18 nM 32 nM 42 nM 155 nM
In vitro

Rigosertib is non-ATP-competitive inhibitor to PLK1 with IC50 of 9 nM. Rigosertib also exhibits inhibition against PLK2, PDGFR, Flt1, BCR-ABL, Fyn, Src, and CDK1, with IC50 of 18-260 nM. Rigosertib shows cell killing activity against 94 different tumor cell lines with IC50 of 50-250 nM, including BT27, MCF-7, DU145, PC3, U87, A549, H187, RF1, HCT15, SW480, and KB cells. While in normal cells, such as HFL, PrEC, HMEC, and HUVEC, Rigosertib has little or no effect unless its concentration is greater than 5-10 μM. In HeLa cells, Rigosertib (100-250 nM) induces spindle abnormalities and apoptosis. [1] Rigosertib also inhibits several multidrug resistant tumor cell lines, including MES-SA, MES-SA/DX5a, CEM, and CEM/C2a, with IC50 of 50-100 nM. In DU145 cells, Rigosertib (0.25-5 μM) blocks cell cycle progression in G2/M phase, results in an accumulation of cells containing subG1 content of DNA, and activates apoptotic pathways. In A549 cells, Rigosertib (50 nM-0.5 μM) induces loss of viability and caspase 3/7 activation. [2] In a recent study, Rigosertib induces apoptosis in chronic lymphocytic leukemia (CLL) cells without toxicity against T-cells or normal B-cells. Rigosertib also abrogates the pro-survival effect of follicular dendritic cells on CLL cells and reduces SDF-1-induced migration of leukemic cells. [3]

Cell Data
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
human K562 cells M17C[GN6fG:2b4jpZ:Kh[XO|YYm= NYqwW2V3QTZiaB?= M3u5SGN6fG:2b4jpZ4l1gSCjZ3HpcpN1KGi3bXHuJGs2PjJiY3XscJMh[W[2ZYKgPVYhcHK|IHL5JJRzgXCjbjDicJVmKGW6Y3z1d4lwdiCjc4PhfUwhUUN3ME23MlUhdk1? MoHjNlE5OTJ2MkG=
human T47D cells NX;HWIFtS3m2b4TvfIlkyqCjc4PhfS=> MXS3NkBp M2TuTmN6fG:2b4jpZ4l1gSCjZ3HpcpN1KGi3bXHuJHQ1P0RiY3XscJMh[W[2ZYKgO|IhcHK|IHL5JG1VXCCjc4PhfUwhT0l3ME2xNEBvVQ>? NGjnPZczOTR4M{m0OC=>
human HeLa cells MXfQdo9tcW[ncnH0bY9vKGG|c3H5 M3PPS|czKGh? NUfhfVRISW62aYDyc4xq\mW{YYTpeoUh[WO2aY\peJkh[WejaX7zeEBpfW2jbjDI[WxiKGOnbHzzJIF{e2W|c3XkJIF{KGOnbHyg[5Jwf3SqIHnubIljcXSrb36gZYZ1\XJiN{KgbJJ{KGK7IF3UWEBie3OjeTygS2k2OD1zMjDuUS=> MmTBNlQ1PzF6N{O=
human MDA468 cells MUnDfZRwfG:6aXRCpIF{e2G7 M{i2fVczKGh? NVnadpJSS3m2b4TvfIlkcXS7IHHnZYlve3RiaIXtZY4hVUSDNE[4JINmdGy|IHHmeIVzKDd{IHjyd{BjgSCPVGSgZZN{[XluIFfJOVA:OjBibl2= M17h[FIyPDZ|OUS0
human LNCAP cells MmDOVJJwdGmoZYLheIlwdiCjc4PhfS=> NIH6UYE4OiCq MlmzRY51cXC{b3zp[oVz[XSrdnWgZYN1cX[rdImgZYdicW6|dDDBVkBxd3OrdHn2[UBpfW2jbjDMUmNCWCClZXzsd{Bie3Onc4Pl[EBieyClZXzsJIdzd3e2aDDpcohq[mm2aX;uJIFnfGW{IEeyJIhzeyCkeTDNWHQh[XO|YYmsJGdKPTB;MkWgcm0> Mm\3NlQ1PzF6N{O=
human PANC1 cells MV;Qdo9tcW[ncnH0bY9vKGG|c3H5 MkTBO|IhcA>? NE[xeGdCdnSrcILvcIln\XKjdHn2[UBi[3Srdnn0fUBi\2GrboP0JIh2dWGwIGDBUmMyKGOnbHzzJIF{e2W|c3XkJIF{KGOnbHyg[5Jwf3SqIHnubIljcXSrb36gZYZ1\XJiN{KgbJJ{KGK7IF3UWEBie3OjeTygS2k2OD1|OTDuUS=> MkDJNlQ1PzF6N{O=
human MCF7 cells M13uN3Bzd2yrZnXyZZRqd25iYYPzZZk> NXLBU3dnPzJiaB?= M2f6fmFvfGmycn;sbYZmemG2aY\lJIFkfGm4aYT5JIFo[Wmwc4SgSXIheG:|aYTpeoUhcHWvYX6gUWNHPyClZXzsd{Bie3Onc4Pl[EBieyClZXzsJIdzd3e2aDDpcohq[mm2aX;uJIFnfGW{IEeyJIhzeyCkeTDNWHQh[XO|YYmsJGdKPTB;NUCgcm0> M3jqZlI1PDdzOEez
human HCT116 cells NF22R4tEgXSxdH;4bYPDqGG|c3H5 NEDrVos4OiCq M3f0VWN6fG:2b4jpZ4l1gSCjZ3HpcpN1KGi3bXHuJGhEXDFzNjDj[YxteyCjZoTldkA4OiCqcoOgZpkhVVSWIHHzd4F6NCCJSUWwQVUxKG6P Mm\DNlE1PjN7NES=
human MCF7 cells NEnY[WNEgXSxdH;4bYPDqGG|c3H5 NH3pc244OiCq NH\3bGZEgXSxdH;4bYNqfHliYXfhbY5{fCCqdX3hckBOS0Z5IHPlcIx{KGGodHXyJFczKGi{czDifUBOXFRiYYPzZZktKEeLNUC9OVAhdk1? NVnjWHFCOjF2NkO5OFQ>
human MDA-MB-231 cells M4TKWnBzd2yrZnXyZZRqd25iYYPzZZk> NWLTe3g{PzJiaB?= NH3NTGRCdnSrcILvcIln\XKjdHn2[UBi[3Srdnn0fUBi\2GrboP0JGVTKG6nZ3H0bZZmKGi3bXHuJG1FSS2PQj2yN|Eh[2WubIOgZZN{\XO|ZXSgZZMh[2WubDDndo94fGhiaX7obYJqfGmxbjDh[pRmeiB5MjDodpMh[nliTWTUJIF{e2G7 NXfUNYsyOjR2N{G4O|M>
human A2780 cells NHfvVIpRem:uaX\ldoF1cW:wIHHzd4F6 NVHx[ZhtPzJiaB?= MmC5RY51cXC{b3zp[oVz[XSrdnWgZYN1cX[rdImgZYdicW6|dDDoeY1idiCDMke4NEBk\WyuczDhd5Nme3OnZDDhd{Bk\WyuIHfyc5d1cCCrbnjpZol1cW:wIHHmeIVzKDd{IHjyd{BjgSCPVGSgZZN{[XluIFfJOVA:PjJibl2= Mk\yNlQ1PzF6N{O=
human HCT116 cells M3K5dXBzd2yrZnXyZZRqd25iYYPzZZk> NXrnZVVrPzJiaB?= MYPBcpRqeHKxbHnm[ZJifGm4ZTDhZ5Rqfmm2eTDh[4FqdnO2IHj1cYFvKEiFVEGxOkBk\WyuczDhd5Nme3OnZDDhd{Bk\WyuIHfyc5d1cCCrbnjpZol1cW:wIHHmeIVzKDd{IHjyd{BjgSCPVGSgZZN{[XluIFfJOVA:PzBibl2= MUmyOFQ4OTh5Mx?=
human DU145 cells MW\Qdo9tcW[ncnH0bY9vKGG|c3H5 M{Cz[VczKGh? M1i4TGFvfGmycn;sbYZmemG2aY\lJIFkfGm4aYT5JIFo[Wmwc4SgRXIhdmWpYYTpeoUhcHWvYX6gSHUyPDViY3XscJMh[XO|ZYPz[YQh[XNiY3XscEBoem:5dHigbY5pcWKrdHnvckBi\nSncjC3NkBpenNiYomgUXRVKGG|c3H5MEBIUTVyPUe1JI5O MUiyOFQ4OTh5Mx?=
human DU145 cells NHvE[VFEgXSxdH;4bYPDqGG|c3H5 M2qzb|k3KGh? NUHyXWU6S3m2b4TvfIlkcXS7IHHnZYlve3RiaIXtZY4hTFVzNEWgZ4VtdHNiYX\0[ZIhQTZiaILzJIJ6KHS{eYDhckBjdHWnIHX4Z4x2e2mxbjDhd5NigSxiSVO1NF04PSCwTR?= NW\6NJZ[OjF6MUK0NlE>
human MRC5 cells NXzsNFAyS3m2b4TvfIlkyqCjc4PhfS=> MoC1O|IhcA>? NVftXJJzS3m2b4TvfIlkcXS7IHHnZYlve3RiaIXtZY4hVVKFNTDj[YxteyCjZoTldkA4OiCqcoOgZpkhVVSWIHHzd4F6NCCJSUWwQVAvPzFizszN M3i1dFIyPDZ|OUS0
human A2780 cells NEX4VYJHfW6ldHnvckBie3OjeR?= MVGwMlI2KM7:TR?= NIjl[VgzPCCq NFjqPGNT\WS3Y4Tpc44hcW5iTXPsNUBt\X[nbDDpckBpfW2jbjDBNlc5OCClZXzsd{BifCByLkK1JJVOKGGodHXyJFI1KGi{czDifUBY\XO2ZYLuJIJtd3RiYX7hcJl{cXN? NELYW2UzPDR5MUi3Ny=>

... Click to View More Cell Line Experimental Data

Methods Test Index PMID
Western blot
pAbl / Abl / PCrk-L / Crk-L / Cleaved caspase3 / Cleaved PARP / pHistone H2A.X; 

PubMed: 26008977     

Ba/F3 T315I cells were treated with rigosertib at the indicated concentrations for 24 h. Total extracts were examined via immunoblotting with anti-phospho ABL, phospho-Crk-L, phosphohistone H2A.X, cleaved caspase 3, cleaved-PARP, ABL, Crk-L, and β-actin antibodies (abs). ABL, Abelson; PARP, poly (ADP-ribose) polymerase; abs, antibodies.

p-ATF / COX IV; 

PubMed: 27764820     

Representative confocal microscopy images of FaDu, UMSCC 47 and D-HMVEC cells treated with rigosertib (1.0 μM) or ON 01911.Na (1.0 μM) for 24 h before fixing, staining with indicated antibodies, and capturing images. Green: p-ATF; Red: Cox IV (mitochondrial marker); Blue: DAPI (nuclear marker).

Growth inhibition assay

PubMed: 29108241     

The GI50 values of BI2536, rigosertib, and poloxin were determined in both parental and volasertib-resistant R-MOLM14 and R-HL-60. Error bars represent the mean values ± S.D. of at least three independent experiments.

Cell viability; 

PubMed: 27764820     

Cell viability as measured by MTS. FaDu, Detroit 562, UMSCC 1, UMSCC 47 and UMSCC 104 cells were treated with increasing concentrations of rigosertib for 48 h, and cell viability was assessed. 50% growth inhibition (IC50) is recorded for each cell line in μM in the legend. Untreated cells were considered 100% viable and percent viability of cells treated with rigosertib was calculated vs. this control. Data represent the mean +/− SD of 3 independent experiments.

29108241 27764820
In vivo In mouse xenograft models of Bel-7402, MCF-7, and MIA-PaCa cells, Rigosertib (250 mg/kg) markedly inhibits tumor growth. [1] Rigosertib (200 mg/kg) shows inhibition on tumor growth in a mouse xengraft model of BT20 cells. [2]


Kinase Assay:[1]
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In vitro enzyme assays for PLK1:

Recombinant PLK1 (10 ng) is incubated with different concentrations of Rigosertib in a 15 µL reaction mixture (50 mM HEPES, 10 mM MgCl2, 1 mM EDTA, 2 mM Dithiothreitol, 0.01% NP-40 [pH 7.5]) for 30 min at room temperature. Kinase reactions are performed for 20 min at 30 °C in a volume of 20 µL (15 µL enzyme + inhibitor, 2 µL 1 mM ATP), 2 µL of γ32P-ATP (40 μCi), and 1 µL of recombinant Cdc25C (100 ng) or casein (1 μg) substrates. Reactions are terminated by boiling for 2 min in 20 µL of 2× Laemmli buffer. Phosphorylated substrates are separated by 18% SDS-PAGE. The gels are dried and exposed to X-ray film for 3-10 min.
Cell Research:[2]
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  • Cell lines: A number of tumor cell lines, including BT20, MCF-7, DU145, PC3, U87, A549, H187, RF1, HCT15, HeLa, and Raji cells
  • Concentrations: 1 nM - 10 μM, dissolved in DMSO as stock solution.
  • Incubation Time: 96 hours
  • Method: Cells are grown in either DMEM or RPMI supplemented with 10% fetal bovine serum and 1 unit/mL penicillin-streptomycin solution. Tumor cells are plated into six-well dishes at a density of 1 × 105cells/mL/well, and Rigosertib is added 24 hours later at various concentrations. Cell counts are determined from duplicate wells after 96-hour of treatment. The total number of viable cells is determined by trypan blue exclusio
    (Only for Reference)
Animal Research:[1]
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  • Animal Models: Mouse (female athymic, NCR-nu/nu) xenograft models of Bel-7402, MCF-7, and MIA-PaCa cells
  • Dosages: 250 mg/kg
  • Administration: Intraperitonially
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 95 mg/mL (200.64 mM)
Water 95 mg/mL (200.64 mM)
Ethanol Insoluble
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Chemical Information

Molecular Weight 473.47


CAS No. 1225497-78-8
Storage powder
in solvent
Synonyms N/A
Smiles COC1=C(C=C(C=C1)CS(=O)(=O)C=CC2=C(C=C(C=C2OC)OC)OC)NCC(=O)[O-].[Na+]

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Clinical Trial Information

NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT04177498 Not yet recruiting Drug: Rigosertib Sodium|Other: Quality-of-Life Assessment Recessive Dystrophic Epidermolysis Bullosa Thomas Jefferson University|Onconova Therapeutics Inc. January 1 2021 Early Phase 1
NCT02075034 Withdrawn Drug: rigosertib Myelodysplastic Syndrome Onconova Therapeutics Inc. May 2014 Phase 1
NCT02030639 Completed Drug: rigosertib Healthy Onconova Therapeutics Inc. January 2014 Phase 1
NCT01928537 Completed Drug: rigosertib sodium Myelodysplastic Syndromes|Refractory Anemia With Excess Blasts|Chronic Myelomonocytic Leukemia|Cytopenia Onconova Therapeutics Inc. August 2013 Phase 3
NCT01807546 Completed Drug: rigosertib Head and Neck Squamous Cell Carcinoma|Anal Squamous Cell Carcinoma|Lung Squamous Cell Carcinoma|Cervical Squamous Cell Carcinoma|Esophageal Squamous Cell Carcinoma|Skin Squamous Cell Carcinoma|Penile Squamous Cell Carcinoma Onconova Therapeutics Inc. March 2013 Phase 2
NCT01168011 Completed Drug: rigosertib Solid Tumor Onconova Therapeutics Inc. July 2010 Phase 1

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID