Revision 3

#12986Store at -20C

 

Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.

Background

Epothilone A and B are taxol-like macrolides originally identified as antifungal, cytotoxic metabolites derived from the myxobacterium Sorangium cellulosum. Research studies demonstrate that epothilone B polymerizes tubulin into microtubules in vitro, which induces mitotic arrest at the G2/M phase and results in inhibition of cell proliferation and cytotoxicity (1-3). Cell cycle arrest at nanomolar IC50 values have been observed in many cell types, including HeLa (IC50 = 32 nM), Hs578T (IC50 = 3 nM) (3), as well as the multiple myeloma cell lines U266 and RPMI 8226 (IC50 = ~1-10 nM) (4). Investigations have shown that both epothilone A and B competitively inhibit binding of taxol to microtubules in vitro (3).

  1. Gerth, K. et al. (1996) J Antibiot (Tokyo) 49, 560-3.
  2. Goodin, S. et al. (2004) J Clin Oncol 22, 2015-25.
  3. Bollag, D.M. et al. (1995) Cancer Res 55, 2325-33.
  4. Lin, B. et al. (2005) Blood 105, 350-7.

Molecular Formula

C27H41NO6S

Molecular Weight

507.68 g/mol

Purity

>99%

CAS

152044-54-7

Solubility

Soluble in DMSO and EtOH at 40mg/ml.

Storage

Store lyophilized or in solution at -20ºC, desiccated. Protect from light. In lyophilized form, the chemical is stable for 24 months. Once in solution, use within 3 months to prevent loss of potency. Aliquot to avoid multiple freeze/thaw cycles.

Directions for Use

Epothilone B is supplied as a lyophilized powder. For a 1 mM stock, reconstitute the 100 µg in 197 µl DMSO. Working concentrations and length of treatment can vary depending on the desired effect, but it is typically used at 10-1000 nM for 12-48 hr.

Background References

    Cross-Reactivity Key

    H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

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