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Ixabepilone (Synonyms: Azaepothilone B, BMS-247550)

Catalog No.GC16869

A broad-spectrum anticancer agent

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Ixabepilone Chemical Structure

Cas No.: 219989-84-1

Size Price Stock Qty
10mM (in 1mL DMSO)
$220.00
In stock
5mg
$198.00
In stock

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Sample solution is provided at 25 µL, 10mM.

Product Documents

Quality Control & SDS

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Protocol

Kinase experiment:

The potency with which BMS-247550 and paclitaxel polymerize tubulin isolated from calf brain is evaluated by Published techniques. Briefly, different concentrations of paclitaxel or BMS-247550 in polymerization buffer [0.1 M mes, 1 mM EGTA, 0.5 mM MgCl2 (pH 6.6)] are added to tubulin in polymerization buffer at 37°C in microcuvette wells of a Beckman. Model DU 7400 UV spectrophotometer. A final microtubule protein concentration of 1.0 mg/mL and compound concentrations of generally 2.5, 5.0, and 10 μM are used. Initial slopes of absorbance (A280 nM) change, measured every 10 s, are calculated by the software program accompanying the instrument.

Cell experiment:

HCT116 cells from cultures are collected by trypsinization after 1, 2, 4, 8, 16, and 24 h exposure to 7.5 nm of BMS-247550. Cells are pelleted and fixed in 80% ethanol at −20°C. After an overnight storage at −20°C, cells are rehydrated with PBS buffer and DNA stain by incubation with propidium iodide (5 μg/mL) in 0.1% RNase for 15-30 min. Fluorescence-activated cell sorter acquisition is performed using the FACS Calibur instrument and analysis is done using Cellquest and Modfit software.

References:

[1]. John T. Hunt Discovery of Ixabepilone. Mol Cancer Ther February 2009 8; 275

Background

Ixabepilone(BMS-247550), an epothilone B analog, is an orally bioavailable microtubule inhibitor [1]. It could bind to tubulin and promote tubulin polymerization and microtubule stabilization, thereby arresting cells in the G2-M phase of the cell cycle and inducing tumor cell apoptosis[2].

In vitro: In a large panel of tumor cell lines, BMS-247550 was as active as epothilone B in inducing cytotoxicity. Of the 21 cells lines tested, the IC50 values were in the range of 1.4–34.5 nm. BMS-247550 almost completely blocked cells in mitosis as early as 8 h after the initiation of drug exposureat a concentration close to the IC90 (7.5 nm, clonogenic cytotoxicity assay) [2].

In vivo: BMS-247550 has clearly demonstrated antitumor activity that is superior to paclitaxel in both paclitaxel-sensitive and -resistant tumors. BMS-247550 was more efficacious than paclitaxel in all five paclitaxel-resistant tumors such as the clinically derived paclitaxel resistant Pat-7 ovarian carcinoma, the A2780Tax ovarian carcinoma that is resistant to paclitaxel because of tubulin mutations, the HCT116/VM46 MDR colon carcinoma, the clinically derived paclitaxel-resistant Pat-21 breast carcinoma, and the murine fibrosarcoma M5076. BMS-247550 produced antitumor activity equivalent to paclitaxel against three paclitaxel-sensitive human tumor xenografts such as A2780 human ovarian carcinoma, HCT116, and LS174T human colon carcinoma [2].

Clinical trials:Numerous phase I trials have evaluated the optimum dose and toxicity associated with ixabepilone. Various phase II studies were designed for patients with varying levels of previous therapies based on ample evidence of response and safety in early trials such as patients with taxane-refractory breast cancer, taxane-naive patients, both taxane-naive and taxane-refractory patients, taxane refractory patients[3].

References:
[1]. Lee FY1, Borzilleri R,Fairchild CR, Kim SH, Long BH, Reventos-Suarez C, Vite GD, Rose WC, Kramer RA.BMS-247550: a novel epothilone analog with a mode of action similar to paclitaxel but possessing superior antitumor efficacy. Clin Cancer Res.2001 May;7(5):1429-37
[2]. Denduluri N, Low J A, Lee J J, et al. Phase II trial of ixabepilone, an epothilone B analog, in patients with metastatic breast cancer previously untreated with taxanes[J]. Journal of clinical oncology, 2007, 25(23): 3421-3427.
[3]. Shannon Puhalla, Adam Brufsky. Ixabepilone: a new chemotherapeutic option for refractory metastatic breast cancer. Biologics. 2008 Sep; 2(3): 505–515.

Chemical Properties

Cas No. 219989-84-1 SDF
Synonyms Azaepothilone B, BMS-247550
Chemical Name (1S,3S,7S,10R,11S,12S,16R)-7,11-dihydroxy-8,8,10,12,16-pentamethyl-3-[(E)-1-(2-methyl-1,3-thiazol-4-yl)prop-1-en-2-yl]-17-oxa-4-azabicyclo[14.1.0]heptadecane-5,9-dione
Canonical SMILES CC1CCCC2(C(O2)CC(NC(=O)CC(C(C(=O)C(C1O)C)(C)C)O)C(=CC3=CSC(=N3)C)C)C
Formula C27H42N2O5S M.Wt 506.7
Solubility ≥ 22.25 mg/mL in DMSO, ≥ 41.3 mg/mL in EtOH with gentle warming Storage 4°C, protect from light
General tips Please select the appropriate solvent to prepare the stock solution according to the solubility of the product in different solvents; once the solution is prepared, please store it in separate packages to avoid product failure caused by repeated freezing and thawing.Storage method and period of the stock solution: When stored at -80°C, please use it within 6 months; when stored at -20°C, please use it within 1 month.
To increase solubility, heat the tube to 37°C and then oscillate in an ultrasonic bath for some time.
Shipping Condition Evaluation sample solution: shipped with blue ice. All other sizes available: with RT, or with Blue Ice upon request.

Complete Stock Solution Preparation Table

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1 mg 5 mg 10 mg
1 mM 1.9736 mL 9.8678 mL 19.7355 mL
5 mM 0.3947 mL 1.9736 mL 3.9471 mL
10 mM 0.1974 mL 0.9868 mL 1.9736 mL
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