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Purity: ≥98%
Tariquidar methanesulfonate hydrate (formerly also known as XR9576) is a novel potent and selective noncompetitive inhibitor of P-glycoprotein (P-gp) with Kd of 5.1 nM in CHrB30 cell line, it reverses drug resistance in MDR cell Lines. Tariquidar is currently undergoing research as an adjuvant against multidrug resistance in cancer. Tariquidar non-competitively binds to the p-glycoprotein transporter, thereby inhibiting transmembrane transport of anticancer drugs. Inhibition of transmembrane transport may result in increased intracellular concentrations of an anticancer drug, thereby augmenting its cytotoxicity.
ln Vitro |
Tariquidar methanesulfonate, hydrate (XR9576 methanesulfonate, hydrate) raises the steady-state accumulation of these cytotoxics in CHrB30 cells to levels seen in non-P-gp-expressing AuxB1 cells (EC50=487±50 nM), making it a potent modulator of P-gp mediated [3H]-Vinblastine and [3H]-Paclitaxel transport. [3H]-Tariquidar has the strongest affinity (Kd=5.1±0.9 nM, n=7) and the maximum binding capacity (Bmax) of 275±15 pmol/mg membrane protein when it comes to CHrB30 membranes. Unlike the ancestral cell line, the modulators XR9576 (EC50=487±50 nM) increase the accumulation of [3H]-Vinblastine in a dose-dependent manner. With a strong IC50 value of 43±9 nM, the MDR modulator Tariquidar can inhibit 60–70% of the activity of the vanadate-sensitive ATPase[1]. Tariquidar (XR9576) enhances the cytotoxicity of several medications, including as Vincristine, Etoposide, Paclitaxel, and Doxorubicin; in the presence of 25–80 nM Tariquidar, resistance is completely reversed. Strong photoaffinity labeling of P-gp by [3H]Azidopine is inhibited by tariquidar, suggesting a direct interaction with the protein[2].
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ln Vivo |
Additionally, coadministration of Tariquidar (6–12 mg/kg po) fully restores the antitumor activity of Paclitaxel, Etoposide, and Vincristine against two highly resistant MDR human tumor xenografts (2780AD, H69/LX4) in nude mice. These mice bear the intrinsically resistant MC26 colon tumors, and coadministration of Tariquidar methanesulfonate, hydrate (XR9576 methanesulfonate, hydrate) potentiates the antitumor activity of Doxorubicin without a significant increase in toxicity. It has also been discovered that tariquidar dramatically increases the antitumor activity of doxorubicin against sc MC26 tumors in vivo[2].
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Animal Protocol |
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References |
[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 |
Molecular Formula |
C40H52N4O12S2
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Molecular Weight |
892.99
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CAS # |
625375-83-9
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SMILES |
S(C([H])([H])[H])(=O)(=O)O[H].S(C([H])([H])[H])(=O)(=O)O[H].O(C([H])([H])[H])C1=C(C([H])=C2C(=C1[H])C([H])([H])N(C([H])([H])C([H])([H])C1C([H])=C([H])C(=C([H])C=1[H])N([H])C(C1=C([H])C(=C(C([H])=C1N([H])C(C1C([H])=NC3=C([H])C([H])=C([H])C([H])=C3C=1[H])=O)OC([H])([H])[H])OC([H])([H])[H])=O)C([H])([H])C2([H])[H])OC([H])([H])[H].O([H])[H].O([H])[H].O([H])[H]
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Synonyms |
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Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
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Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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Solubility (In Vitro) |
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Solubility (In Vivo) |
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Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
1 mM | 1.1198 mL | 5.5992 mL | 11.1983 mL | |
5 mM | 0.2240 mL | 1.1198 mL | 2.2397 mL | |
10 mM | 0.1120 mL | 0.5599 mL | 1.1198 mL |
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.
Calculation results
Working concentration: mg/mL;
Method for preparing DMSO stock solution: mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation::Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
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