Home Cytoskeletal Signaling Kinesin inhibitor Ispinesib (SB-715992)

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Ispinesib (SB-715992) Kinesin inhibitor

Cat.No.S1452

Ispinesib (SB-715992, CK0238273) is a potent, specific and reversible inhibitor of kinesin spindle protein (KSP) with Ki app of 1.7 nM in a cell-free assay, showing no inhibition to CENP-E, RabK6, MCAK, MKLP1, KHC or Kif1A. This compound induces mitotic arrest and apoptotic cell death.
Ispinesib (SB-715992) Kinesin inhibitor Chemical Structure

Chemical Structure

Molecular Weight: 517.06

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Quality Control

Batch: Purity: 99.97%
99.97

Cell Culture, Treatment & Working Concentration

Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
HCT116 Antiproliferative assay 72 hrs Antiproliferative activity against human HCT116 cells after 72 hrs by Alamar blue assay, GI50=0.025μM 22248262
hTERT-HME1 Antiproliferative assay 72 hrs Antiproliferative activity against human hTERT-HME1 cells after 72 hrs by Alamar blue assay, GI50=0.032μM 22248262
K562 Antiproliferative assay 72 hrs Antiproliferative activity against human K562 cells after 72 hrs by Alamar blue assay, GI50=0.071μM 22248262
BxPC3 Antiproliferative assay 72 hrs Antiproliferative activity against human BxPC3 cells after 72 hrs by Alamar blue assay, GI50=0.08μM 22248262
NCI-H1299 Antiproliferative assay 72 hrs Antiproliferative activity against human NCI-H1299 cells after 72 hrs by Alamar blue assay, GI50=0.082μM 22248262
LNCAP Growth inhibition assay 72 hrs Growth inhibition of human LNCAP cells after 72 hrs by Alamar blue assay, GI50=0.022μM 23394180
HCT116 Growth inhibition assay 72 hrs Growth inhibition of human HCT116 cells after 72 hrs by Alamar blue assay, GI50=0.025μM 23394180
PC3 Growth inhibition assay 72 hrs Growth inhibition of human PC3 cells after 72 hrs by Alamar blue assay, GI50=0.05μM 23394180
BxPC3 Growth inhibition assay 72 hrs Growth inhibition of human BxPC3 cells after 72 hrs by Alamar blue assay, GI50=0.08μM 23394180
NCI-H1299 Growth inhibition assay 72 hrs Growth inhibition of human NCI-H1299 cells after 72 hrs by Alamar blue assay, GI50=0.082μM 23394180
LXFS 538 Antitumor assay 6 mg/kg Antitumor activity against human LXFS 538 cells xenografted in NMRI nu/nu mouse assessed as tumor regression at 6 mg/kg, ip measured on day 13 23394180
HeLa Antiproliferative assay 48 hrs Antiproliferative activity against human HeLa cells after 48 hrs by MTT assay, IC50=1μM 24184776
MCF7 Antiproliferative assay 48 hrs Antiproliferative activity against human MCF7 cells after 48 hrs by MTT assay, IC50=1.3μM 24184776
HCT116 Growth inhibition assay 72 hrs Growth inhibition of human HCT116 cells after 72 hrs by MTS assay, IC50=0.0011μM 26396688
TC32 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for TC32 cells 29435139
DAOY qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for DAOY cells 29435139
SJ-GBM2 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SJ-GBM2 cells 29435139
A673 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for A673 cells 29435139
SK-N-MC qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells 29435139
NB-EBc1 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB-EBc1 cells 29435139
Saos-2 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Saos-2 cells 29435139
LAN-5 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for LAN-5 cells 29435139
BT-12 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for BT-12 cells 29435139
OHS-50 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for OHS-50 cells 29435139
A673 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for A673 cells) 29435139
SK-N-MC qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for SK-N-MC cells 29435139
BT-12 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for BT-12 cells 29435139
DAOY qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for DAOY cells 29435139
BT-37 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for BT-37 cells 29435139
TC32 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for TC32 cells 29435139
MG 63 (6-TG R) qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for MG 63 (6-TG R) cells 29435139
U-2 OS qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for U-2 OS cells 29435139
Rh41 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for Rh41 cells 29435139
RD qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for RD cells 29435139
Rh30 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for Rh30 cells 29435139
Saos-2 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for Saos-2 cells 29435139
SK-N-SH qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for SK-N-SH cells 29435139
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Solubility

In vitro
Batch:

DMSO : 103 mg/mL (199.2 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 103 mg/mL

Water : Insoluble

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In vivo
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Chemical Information, Storage & Stability

Molecular Weight 517.06 Formula

C30H33ClN4O2

 Storage (From the date of receipt)
CAS No. 336113-53-2 Download SDF Storage of Stock Solutions

Synonyms CK0238273 SMILES CC1=CC=C(C=C1)C(=O)N(CCCN)C(C2=NC3=C(C=CC(=C3)Cl)C(=O)N2CC4=CC=CC=C4)C(C)C

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Features
An allosteric, potent, specific, and reversible inhibitor of the mitotic kinesin spindle protein (KSP) (HsEg5).
Targets/IC50/Ki
KSP (HsEg5)
(Cell-free assay)
1.7 nM(Ki app)
In vitro

Ispinesib (SB-715992) is a potent, allosteric, reversible, and specific inhibitor of KSP, which changes the binding property of KSP to microtubules and disturbs its movement by inhibiting ADP release without altering the release of the KSP-ADP complex from the microtubule. This compound shows potent cytotoxic activity in a panel of tumor cell lines, including Colo205, Colo201, HT-29, M5076, Madison-109, and MX-1, with IC50 of 1.2 nM to 9.5 nM. In PC-3 prostate cancer cells, it (15 nM and 30 nM) blocks cell proliferation and induces apoptosis by regulating the expression levels of genes that controls apoptosis, cell proliferation, cell cycle, and cell signaling, such as EGFR, p27, p15, and IL-11. In a panel of 53 breast cell lines, Ispinesib (7.4 nM–600 nM) demonstrates broad inhibitory activity. In BT-474 and MDA-MB-468 cells, it (150 nM) induces apoptosis, as revealed by a higher proportion of apoptotic cells, lower antiapoptotic Bcl-XL level, and higher proapoptotic Bax and Bid levels.

Kinase Assay
Steady-State Kinetic Analysis of Human KSP ATPase Activity and Inhibition by Ispinesib
Kinesin specificity analysis is carried out using a pyruvate kinase-lactate dehydrogenase detection system that couples the production of ADP to oxidation of NADH. Absorbance changes are monitored at 340 nm. Steady-state studies using nanomolar concentrations of KSP are performed using a sensitive fluorescence-based assay utilizing a pyruvate kinase, pyruvate oxidase, and horseradish peroxidase (HRP) coupled detection system that couples the generation of ADP to oxidation of Amplex Red to fluorescent resorufin. Generation of resorufin is monitored by fluorescence (λexcitation = 520 nm and λemission = 580 nm). Steady-state biochemical experiments are performed in PEM25 buffer [25 mM Pipes-K+ (pH 6.8), 2 mM MgCl2, 1 mM EGTA] for experiments involving microtubules. The IC50 for steady-state inhibition is determined at 500 µM ATP, 5 µM Microtubules, and 1 nM KSP in PEM25 buffer. Ki app (apparent inhibitor dissociation constant) values of Ispinesib (SB-715992) are extracted from the dose-response curves, with explicit correction for enzyme concentration by using the Morrison equation. Inhibitor modality (e.g., competitive, noncompetitive, uncompetitive, or mixed) under steady-state conditions is determined by measuring the effect of its concentration on initial velocity as a function of substrate concentrations. Data are fit using equations in GraFit to velocity equations for the various modes of inhibition.
In vivo

Ispinesib (SB-715992) (4.5 mg/kg–15 mg/kg) exhibits inhibitory effects against Colo205, Colo201, HT-29, but not MX-1 cells, in mouse xenograft models. This compound (6 mg/kg–10 mg/kg) also inhibits murine solid tumors, including Madison 109 lung carcinoma, M5076 sarcoma, as well as L1210 and P388 leukemias. In mice xenograft models of breast cancer cells MCF-7, HCC1954, MDA-MB-468, and KPL4, it (8 mg/kg–10 mg/kg) inhibits tumor growth.

References
  • [4] https://pubmed.ncbi.nlm.nih.gov/20068098/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2017-03-06)

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT00095628 COMPLETED
Metastatic Squamous Neck Cancer With Occult Primary Squamous Cell Carcinoma; Recurrent Metastatic Squamous Neck Cancer With Occult Primary; Recurrent Salivary Gland Cancer; Recurrent Squamous Cell Carcinoma of the Hypopharynx; Recurrent Squamous Cell Carcinoma of the Larynx; Recurrent Squamous Cell Carcinoma of the Lip and Oral Cavity; Recurrent Squamous Cell Carcinoma of the Oropharynx; Recurrent Squamous Cell Carcinoma of the Paranasal Sinus and Nasal Cavity; Recurrent Verrucous Carcinoma of the Larynx; Recurrent Verrucous Carcinoma of the Oral Cavity; Stage IV Squamous Cell Carcinoma of the Hypopharynx; Stage IV Squamous Cell Carcinoma of the Larynx; Stage IV Squamous Cell Carcinoma of the Lip and Oral Cavity; Stage IV Squamous Cell Carcinoma of the Oropharynx; Stage IV Verrucous Carcinoma of the Larynx; Stage IV Verrucous Carcinoma of the Oral Cavity; Stage IVA Salivary Gland Cancer; Stage IVA Squamous Cell Carcinoma of the Paranasal Sinus and Nasal Cavity; Stage IVB Salivary Gland Cancer; Stage IVB Squamous Cell Carcinoma of the Paranasal Sinus and Nasal Cavity; Stage IVC Salivary Gland Cancer; Stage IVC Squamous Cell Carcinoma of the Paranasal Sinus and Nasal Cavity
National Cancer Institute (NCI)
 2005-01 PHASE2
NCT00101244 TERMINATED
Adult Grade III Lymphomatoid Granulomatosis; Extranodal Marginal Zone B-cell Lymphoma of Mucosa-associated Lymphoid Tissue; Nodal Marginal Zone B-cell Lymphoma; Recurrent Adult Burkitt Lymphoma; Recurrent Adult Diffuse Large Cell Lymphoma; Recurrent Adult Diffuse Mixed Cell Lymphoma; Recurrent Adult Diffuse Small Cleaved Cell Lymphoma; Recurrent Adult Grade III Lymphomatoid Granulomatosis; Recurrent Adult Hodgkin Lymphoma; Recurrent Adult Immunoblastic Large Cell Lymphoma; Recurrent Adult Lymphoblastic Lymphoma; Recurrent Grade 1 Follicular Lymphoma; Recurrent Grade 2 Follicular Lymphoma; Recurrent Grade 3 Follicular Lymphoma; Recurrent Mantle Cell Lymphoma; Recurrent Marginal Zone Lymphoma; Recurrent Small Lymphocytic Lymphoma; Splenic Marginal Zone Lymphoma; Stage IV Adult Burkitt Lymphoma; Stage IV Adult Diffuse Large Cell Lymphoma; Stage IV Adult Diffuse Mixed Cell Lymphoma; Stage IV Adult Diffuse Small Cleaved Cell Lymphoma; Stage IV Adult Hodgkin Lymphoma; Stage IV Adult Immunoblastic Large Cell Lymphoma; Stage IV Adult Lymphoblastic Lymphoma; Stage IV Grade 1 Follicular Lymphoma; Stage IV Grade 2 Follicular Lymphoma; Stage IV Grade 3 Follicular Lymphoma; Stage IV Mantle Cell Lymphoma; Stage IV Marginal Zone Lymphoma; Stage IV Small Lymphocytic Lymphoma; Unspecified Adult Solid Tumor, Protocol Specific; Waldenström Macroglobulinemia
National Cancer Institute (NCI)
 2004-11 PHASE1
NCT00103311 COMPLETED
Recurrent Colon Cancer; Recurrent Rectal Cancer; Stage IIIA Colon Cancer; Stage IIIA Rectal Cancer; Stage IIIB Colon Cancer; Stage IIIB Rectal Cancer; Stage IIIC Colon Cancer; Stage IIIC Rectal Cancer; Stage IVA Colon Cancer; Stage IVA Rectal Cancer; Stage IVB Colon Cancer; Stage IVB Rectal Cancer
National Cancer Institute (NCI)
 2005-01 PHASE2
NCT00607841 TERMINATED
Breast Neoplasms
Cytokinetics
 2007-12 PHASE1
NCT00363272 COMPLETED
Childhood Burkitt Lymphoma; Childhood Central Nervous System Germ Cell Tumor; Childhood Choroid Plexus Tumor; Childhood Craniopharyngioma; Childhood Grade I Meningioma; Childhood Grade II Meningioma; Childhood Grade III Meningioma; Childhood High-grade Cerebral Astrocytoma; Childhood Infratentorial Ependymoma; Childhood Low-grade Cerebral Astrocytoma; Childhood Spinal Cord Neoplasm; Childhood Supratentorial Ependymoma; Recurrent Childhood Brain Stem Glioma; Recurrent Childhood Brain Tumor; Recurrent Childhood Cerebellar Astrocytoma; Recurrent Childhood Cerebral Astrocytoma; Recurrent Childhood Ependymoma; Recurrent Childhood Grade III Lymphomatoid Granulomatosis; Recurrent Childhood Large Cell Lymphoma; Recurrent Childhood Lymphoblastic Lymphoma; Recurrent Childhood Medulloblastoma; Recurrent Childhood Small Noncleaved Cell Lymphoma; Recurrent Childhood Supratentorial Primitive Neuroectodermal Tumor; Recurrent Childhood Visual Pathway and Hypothalamic Glioma; Unspecified Childhood Solid Tumor, Protocol Specific
National Cancer Institute (NCI)
 2006-06 PHASE1
NCT00098826 COMPLETED
Acute Undifferentiated Leukemia; Adult Acute Megakaryoblastic Leukemia (M7); Adult Acute Minimally Differentiated Myeloid Leukemia (M0); Adult Acute Monoblastic Leukemia (M5a); Adult Acute Monocytic Leukemia (M5b); Adult Acute Myeloblastic Leukemia With Maturation (M2); Adult Acute Myeloblastic Leukemia Without Maturation (M1); Adult Acute Myeloid Leukemia With 11q23 (MLL) Abnormalities; Adult Acute Myeloid Leukemia With Inv(16)(p13;q22); Adult Acute Myeloid Leukemia With t(15;17)(q22;q12); Adult Acute Myeloid Leukemia With t(16;16)(p13;q22); Adult Acute Myeloid Leukemia With t(8;21)(q22;q22); Adult Acute Myelomonocytic Leukemia (M4); Adult Acute Promyelocytic Leukemia (M3); Adult Erythroleukemia (M6a); Adult Pure Erythroid Leukemia (M6b); Blastic Phase Chronic Myelogenous Leukemia; de Novo Myelodysplastic Syndromes; Previously Treated Myelodysplastic Syndromes; Recurrent Adult Acute Lymphoblastic Leukemia; Recurrent Adult Acute Myeloid Leukemia; Refractory Anemia With Excess Blasts; Refractory Anemia With Excess Blasts in Transformation; Relapsing Chronic Myelogenous Leukemia; Secondary Acute Myeloid Leukemia; Secondary Myelodysplastic Syndromes; Untreated Adult Acute Myeloid Leukemia
National Cancer Institute (NCI)
 2004-12 PHASE1

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