Epothilone B (EPO906, Patupilone) 化学構造
分子量: 507.68

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製品説明

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    Microtubule Associated製品生物活性の比較
  • 研究分野
  • Epothilone B (EPO906, Patupilone)のメカニズム

製品の説明

生物活性

製品説明 Epothilone B (EPO906, Patupilone) は、タキソールのような微小管安定化エージェントで、 EC0.01 が 1.8 μM。
ターゲット Tubulin
IC50 1.8 μM (EC0.01) [1]
In vitro試験 Epothilone B shows better activity than Epothilone A. The EC0.01 of Epothilone B is 1.8 μM. Epothilone B potently inhibits cell proliferation in HCT116 cells, with IC50 of 0.8 nM. [1] Epothilone B induces mitotic arrest and displays cytotoxicity in KB3-1, KBV-1, Hela, and Hs578T cells, with IC50 of 3 nM to 92 nM. Epothilone B competes with Taxol in binding to microtubules, with IC50 of 3.3 μM. [2] In MCF-7 cells overexpressing GFP-α-tubulin, Epothilone B (3.5 nM) efficiently blocks microtubule dynamics. Meanwhile, Epothilone B induces mitotic arrest with IC50 of 3.5 nM. [3] In multiple myeloma (MM) cells, including RPMI 8226, U266, MM.1S, LR5, and MR20, Epothilone B directly suppresses proliferation with IC50 of 1 nM to 10 nM. Similarly, Epothilone B (10 nM) also induces cell cycle arrest and apoptosis. [4] A recent study reveals that, in ovarian cancer Hey cells, Epothilone B (5 nM–100 nM) enhances surface epithelial cell adhesion antigen (EpCAM), without affecting the transcription or the total cellular level of EpCAM. [5]
In vivo試験 In a mouse xenograft model of RPMI 8226 cells, Epothilone B (2.5 mg/kg–4 mg/kg) prolongs survival and suppresses tumor growth. [4] Similarly, in mouse xenograft models of prostate cancer cells, including DU145 and PC3, Epothilone B at the same dose also inhibits tumor growth. [6]
臨床試験 A Phase III clinical trial for Epothilone B in patients with ovarian, primary fallopian, or peritoneal cancer has been completed.
特集

プロトコル (参考用のみ)

キナーゼアッセイ: [1]

Tubulin polymerization assay Calf brain microtubule proteins (MTP) are purified, which includes approximately 15%–20% microtubule associated proteins. The buffer (MES buffer) used for the Epothilone B-microtubule studies contains 0.1 M 2-morpholinoethanesulfonic acid (MES), 1 mM EGTA, 0.5 mM MgCl2, and 3 M glycerol at pH 6.6. Samples for electron microscopy are placed on carbon-over-Parlodion-coated grids (300 mesh) and negatively stained with 2% uranyl acetate. Microtubule assembly in the presence or absence of Epothilone B is monitored spectrophotometrically by using a spectrophotometer equipped with a thermostatically regulated liquid circulator. The temperature is held at 35 °C and changes in turbidity (representative of polymer mass) are monitored at 350 nm. Effective concentration (EC0.01), defined as the interpolated concentration capable of inducing an initial slope of 0.01 OD/min rate, is calculated using the formula EC0.01 = concentration/slope and expressed as the mean with standard deviation obtained from three different concentrations.

細胞アッセイ: [2]

細胞株 KB3-1, KBV-1, Hela, and Hs578T cells
濃度 0–1 μM
反応時間 72 hours
実験の流れ For mitotic block and aberrant mitosis, cells are plated either in 48-well plates (for trypan blue and cell counting) or onto coverslips. After 24 hours, cells are treated with Epothilone B and scored at regular intervals. For the cytotoxicity analysis, cells are counted and scored as trypan blue positive or negative. Concurrently, coverslips andaliquots of cells in the culture supernatant are fixed and stained with Hoechst33342 in PBS. These cells are scored for cells blocked at the G2/M transition and aberrant mitosis.

動物実験: [4]

動物モデル Mice xenograft model of RPMI 8226 cells
製剤 Dissolved in30% PEG-300
投薬量 2.5 mg/kg–4 mg/kg
投与方法 Inject intravenously

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

SpeciesMouseRatRabbitGuinea pigHamsterDogMonkeyBaboon
Weight (kg)0.020.151.80.40.0810312
Body Surface Area (m2)0.0070.0250.150.050.020.50.240.6
Km factor361285201220
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Rat dose (mg/kg) = mouse dose (22.4 mg/kg) ×  mouse Km(3)  = 11.2 mg/kg
rat Km(6)
1

参考

化学情報

Download Epothilone B (EPO906, Patupilone) SDF
分子量 507.68
化学式

C27H41NO6S

CAS No. 152044-54-7
保管 2年-20℃
6月-80℃in solvent
別名 N/A
溶解度 (25°C) * In vitro DMSO 102 mg/mL (200.91 mM)
エタノール 102 mg/mL (200.91 mM)
<1 mg/mL (<1 mM)
In vivo 30% PEG400+0.5% Tween80+5% propylene glycol 5 mg/mL
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
化学名 (1S,3S,7S,10R,11S,12S,16R,E)-7,11-dihydroxy-8,8,10,12,16-pentamethyl-3-(1-(2-methylthiazol-4-yl)prop-1-en-2-yl)-4,17-dioxa-bicyclo[14.1.0]heptadecane-5,9-dione

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
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