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• 产品描述： Tariquidar methanesulfonate, hydrate (XR9576 methanesulfonate, hydrate) is a potent and specific inhibitor of P-glycoprotein (P-gp) with a Kd of 5.1 nM.

• 靶点： Kd: 5.1 nM (P-gp)

• 体外研究：
  Tariquidar methanesulfonate, hydrate (XR9576 methanesulfonate, hydrate) is a potent modulator of P-gp mediated [3H]-Vinblastine and [3H]-Paclitaxel transport as it increases the steady-state accumulation of these cytotoxics in CHrB30 cells to levels observed in non-P-gp-expressing AuxB1 cells (EC50=487±50 nM). [3H]-Tariquidar binds to CHrB30 membranes with the highest affinity (Kd=5.1±0.9 nM, n=7) and a binding capacity (Bmax) of 275±15 pmol/mg membrane protein. In contrast to the parental cell line, the accumulation of [3H]-Vinblastine is increased in a dose-dependent fashion by the modulators XR9576 (EC50=487±50 nM). The MDR modulator Tariquidar is able to inhibit 60-70% of the vanadate-sensitive ATPase activity, with potent IC50 value of 43±9 nM. Tariquidar (XR9576) potentiates the cytotoxicity of several drugs including Doxorubicin, Paclitaxel, Etoposide, and Vincristine; complete reversal of resistance is achieved in the presence of 25-80 nM Tariquidar. Tariquidar is a potent inhibitor of photoaffinity labeling of P-gp by [3H]Azidopine implying a direct interaction with the protein.

• 体内研究：
  In mice bearing the intrinsically resistant MC26 colon tumors, coadministration of Tariquidar methanesulfonate, hydrate (XR9576 methanesulfonate, hydrate) potentiates the antitumor activity of Doxorubicin without a significant increase in toxicity; maximum potentiation is observed at 2.5-4.0 mg/kg dosed either i.v. or p.o. In addition, coadministration of Tariquidar (6-12 mg/kg p.o.) fully restores the antitumor activity of Paclitaxel, Etoposide, and Vincristine against two highly resistant MDR human tumor xenografts (2780AD, H69/LX4) in nude mice. Tariquidar is found to also significantly potentiate the antitumor activity of doxorubicin against s.c. MC26 tumors in vivo

• 参考文献：
  1. Martin C, et al. The molecular interaction of the high affinity reversal agent XR9576 with P-glycoprotein. Br J Pharmacol, 1999, 128(2), 403-411. 2. Mistry P, et al. In vitro and in vivo reversal of P-glycoprotein-mediated multidrug resistance by a novel potent modulator, XR9576. Cancer Res, 2001, 61(2), 749-758. 3. Vraka C, et al. A new method measuring the interaction of radiotracers with the human P-glycoprotein (P-gp) transporter. Nucl Med Biol. 2018 Feb 14;60:29-36.

• 溶解性： Soluble  in  DMSO、H2O

• 保存条件： -20℃

• 配置溶液浓度参考：
  

  	1mg	5mg	10mg
  1 mM	1.12 ml	5.599 ml	11.198 ml
  5 mM	0.224 ml	1.12 ml	2.24 ml
  10 mM	0.112 ml	0.56 ml	1.12 ml
  50 mM	0.022 ml	0.112 ml	0.224 ml

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本计算器可帮助您计算出特定溶液中溶质的质量、溶液浓度和体积之间的关系，公式为：

质量 (mg) = 浓度 (mM) x 体积 (mL) x 分子摩尔量 (g/mol)

• pg ng μg mg g kg =
  fM pM nM μM mM M *
  nL μL mL L *