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Epothilone D

Catalog No. TQ0202   CAS 189453-10-9
Synonyms: KOS 862

Epothilone D (KOS 862) is an effective microtubule stabilizer.

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Epothilone D, CAS 189453-10-9
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Purity: 98%
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Biological Description
Chemical Properties
Storage & Solubility Information
Description Epothilone D (KOS 862) is an effective microtubule stabilizer.
In vitro Epothilone D is a more potent microtubule stabilizer in vitro than epothilone A or B. In vitro, Epothilone D has shown potent cytotoxicity in a panel of human tumor cell lines, with similar potency to paclitaxel. Epothilone D also shows a definite advantage over paclitaxel in drug-resistant cell lines and retained its cytotoxicity against a multidrug-resistant cell line over-expressing P-glycoprotein [1].
In vivo To evaluate whether Epothilone D improves MT and axonal function in PS19 mice, groups of 3-month old male PS19 mice received weekly i.p. injections of vehicle or Epothilone D (1 mg/kg or 3 mg/kg) for a total of 3 months. In addition, 3-month old non-Tg littermates received 3 mg/kg Epothilone D or vehicle. The 3 mg/kg Epothilone D dose corresponds to ~10-fold less than that used in Phase II clinical study, which should minimize side-effects such as neutropenia that are observed with MT-stabilizing drugs in human subjects. PS19 and WT mice that receive Epothilone D show no signs of drug intolerance. Indeed, all drug-treated mice exhibited weight gain that is indistinguishable from vehicle-treated animals. Likewise, relative organ weights are similar in vehicle- and Epothilone D-treated mice. The motor performance of Epothilone D-treated mice, assessed using a standard rotarod test, is not significantly different from vehicle-treated cohorts [2].
Animal Research Groups of mice (n=3) receive intraperitoneal (i.p.) injections of 3.7 mg/kg of Epothilone D (epoD) dissolved in 100% DMSO, followed by euthanization using approved at times ranging from 0.25 h to 24 h. In another study, groups of mice (n=3) receive injections of 3 mg/kg of epoD in 100% DMSO followed by euthanization 4, 6 and 10 days later. The Epothilone D (epoD) levels in the brain and blood samples are determined using LC-MS/MS protocols. Groups (n=10-13) of 3-month old PS19 tau Tg mice or 3-month old non-Tg littermates are administered weekly i.p. injections of 1 mg/kg epoD, 3 mg/kg of Epothilone D (epoD) or vehicle (DMSO), for a total of 3 months. Animals are monitored for signs of abnormal behavior or distress and are weighed weekly. After final dosing, the mice undergo motor function and cognitive testing. After euthanization, brains and optic nerve (ON) are recovered for immunohistochemical analyses. A subset of mice from each group also undergo necropsy evaluation with organ weights recorded [2].
Synonyms KOS 862
Molecular Weight 491.68
Formula C27H41NO5S
CAS No. 189453-10-9


Powder: -20°C for 3 years

In solvent: -80°C for 2 years

Solubility Information

DMSO: 300 mg/mL (610.15 mM)

( < 1 mg/ml refers to the product slightly soluble or insoluble )

References and Literature

1. Konner J, et al. Phase I clinical, pharmacokinetic, and pharmacodynamic study of KOS-862 (Epothilone D) in patients with advanced solid tumors and lymphoma. Invest New Drugs. 2012 Dec;30(6):2294-302. 2. Brunden KR, et al. Epothilone D improves microtubule density, axonal integrity, and cognition in a transgenic mouse model of tauopathy. J Neurosci. 2010 Oct 13;30(41):13861-6.

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Epothilone D 189453-10-9 Cytoskeletal Signaling Microtubule Associated KOS 862 Inhibitor inhibitor inhibit