Zosuquidar (RS 33295-198) trihydrochloride is an inhibitor of P-glycoprotein with a K_i value of 59 nM.

Ki: 59nM (P-glycoprotein)^[1].

Zosuquidar completely or partially restores drug sensitivity in all P-gp-expressing leukemia cell lines and enhances the cytotoxicity of anthracyclines (daunorubicin, idarubicin, mitoxantrone) and gemtuzumab ozogamicin (Mylotarg) in primary AmL blasts with active P-gp. In addition, P-gp inhibition by zosuquidar is found to be more potent than cyclosporine A in cells with highly active P-gp^[2].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

Zosuquidar trihydrochloride is only moderately active as an inhibitor of P-gp at the blood-brain. An oral dose of 25 mg/kg of zosuquidar trihydrochloride increases the brain concentrations by about 2.5-fold at 1 h and 5-fold at 24 h after paclitaxel administrationbarrier^[3]. Zosuquidar enhances the brain uptake of nelfinavir in a dose-dependent manner. Brain tissue/plasma nelfinavir concentration ratios increase from 0.06±0.03 in the absence of zosuquidar administration and 0.09±0.02 between 2 and 6 h after a 2 mg/kg intravenous dose of zosuquidar to 0.85±0.19 after 6h and 1.58±0.67 after 20 mg/kg zosuquidar^[4].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

636.99

C₃₂H₃₄Cl₃F₂N₃O₂

167465-36-3

唑喹达三盐酸盐

Room temperature in continental US; may vary elsewhere.

4°C, sealed storage, away from moisture

*该产品在溶液状态不稳定，建议您现用现配，即刻使用。

H₂O : 5 mg/mL (7.85 mM; Need ultrasonic)

DMSO : 1 mg/mL (1.57 mM; Need ultrasonic)

请根据产品在不同溶剂中的溶解度，选择合适的溶剂配制储备液；该产品在溶液状态不稳定，建议您现用现配，即刻使用。

• 1.

  Zosuquidar is dissolved in 20% ethanol-saline^[5].

• [1]. Cripe LD, et al. Zosuquidar, a novel modulator of P-glycoprotein, does not improve the outcome of older patients with newly diagnosed acute myeloid leukemia: a randomized, placebo-controlled trial of the Eastern Cooperative Oncology Group 3999. Blood.?201

  [2]. Hou J, et al. Quantitative determination and pharmacokinetic study of the novel anti-Parkinson’s disease candidate drug FLZ in rat brain by high performance liquid chromatography-tandem mass spectrometry. J Pharm Biomed Anal. 2012 Jul;66:232-9.

  [3]. Tang R, et al. Zosuquidar?restores drug sensitivity in P-glycoprotein expressing acute myeloid leukemia (AmL). BMC Cancer.?2008 Feb 13;8:51.?

  [4]. Kemper EM, et al. The influence of the P-glycoprotein inhibitor zosuquidar trihydrochloride (LY335979) on the brain penetration of paclitaxel in mice. Cancer Chemother Pharmacol. 2004 Feb;53(2):173-8.

  [5]. Anderson BD, et al. Dependence of nelfinavir brain uptake on dose and tissue concentrations of the selective P-glycoprotein inhibitor zosuquidar in rats. Drug Metab Dispos. 2006 Apr;34(4):653-9.

Cells are cultured in 96-well plates. Each drug of interest is added at escalating concentrations in the presence or absence of either zosuquidar or CsA. After 48 hour incubation (except Mylotarg, 4 days incubation), 20 μL of MTT is added to each well for a further 4 hour incubation. The purple precipitate is dissolved in 200 μL DMSO, and the optic density (OD) is determined by the multi-well plate reader^[2].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

Rats: Female Sprague-Dawley rats are used in the study. Zosuquidar solutions are prepared in 5% mannitol and adjusted to pH ～2.0 with concentrated HCl. Nelfinavir is infused (10 mg/kg/h) for up to 10 h with or without concurrent administration of an intravenous bolus dose of 2, 6, or 20 mg/kg zosuquidar given at 4 h. Brain tissue and plasma are analyzed for both drug concentrations^[4].

Mice: A stock solution of 5 mg/mL of zosuquidar trihydrochloride is prepared in vehicle solution and diluted in sterile saline. The vehicle solution consisted of 20 g/l mannitol and 1.5 g/l of glycine in water for injection and adjusted to a pH of 2.7 with hydrochloric acid. P-gp knockout mice and wild type mice are used as a model for complete inhibition of P-gp. Zosuquidar trihydrochloride is administered orally at 25 and 80 mg/kg 1 h before i.v. paclitaxel and i.v. at 20 mg/kg 10 min and 1 h before paclitaxel. The concentrations of paclitaxel in plasma and tissues and of zosuquidar trihydrochloride in plasma are quantified by high-performance liquid chromatography^[3].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

• [1]. Cripe LD, et al. Zosuquidar, a novel modulator of P-glycoprotein, does not improve the outcome of older patients with newly diagnosed acute myeloid leukemia: a randomized, placebo-controlled trial of the Eastern Cooperative Oncology Group 3999. Blood.?201

  [2]. Hou J, et al. Quantitative determination and pharmacokinetic study of the novel anti-Parkinson’s disease candidate drug FLZ in rat brain by high performance liquid chromatography-tandem mass spectrometry. J Pharm Biomed Anal. 2012 Jul;66:232-9.

  [3]. Tang R, et al. Zosuquidar?restores drug sensitivity in P-glycoprotein expressing acute myeloid leukemia (AmL). BMC Cancer.?2008 Feb 13;8:51.?

  [4]. Kemper EM, et al. The influence of the P-glycoprotein inhibitor zosuquidar trihydrochloride (LY335979) on the brain penetration of paclitaxel in mice. Cancer Chemother Pharmacol. 2004 Feb;53(2):173-8.

  [5]. Anderson BD, et al. Dependence of nelfinavir brain uptake on dose and tissue concentrations of the selective P-glycoprotein inhibitor zosuquidar in rats. Drug Metab Dispos. 2006 Apr;34(4):653-9.