Tariquidar
Tariquidar is a potent inhibitor of P-glycoprotein (Pgp), a 170-kDa transmembrane protein acting as a drug efflux pump to actively transport structurally unrelated compounds out of cells, that noncompetitively inhibits the basal the activity of ATPase associated with Pgp. Tariquidar contains a tertiary amine, dimethoxyphenyl group and amide group in its chemical structure, which contribute to its inhibition against Pgp. Results of in vitro assays of three different models have shown that Tariquidar inhibits Pgp with 50% inhibition concentration IC50 values ranging from 15 to 223 nM. However, the inhibition by tariquidar is Pgp-specific and attenuated in tumor cell lines, where multidrug resistance is mediated by multidrug resistance-associated protein.
Reference
Fox E, Bates SE. Tariquidar (XR9576): a P-glycoprotein drug efflux pump inhibitor. Expert Rev Anticancer Ther. 2007 Apr;7(4):447-59.
Bankstahl JP, Bankstahl M, Römermann K, Wanek T, Stanek J, Windhorst AD, Fedrowitz M, Erker T, Müller M, Löscher W, Langer O, Kuntner C. Tariquidar and elacridar are dose-dependently transported by P-glycoprotein and Bcrp at the blood-brain barrier: a small-animal positron emission tomography and in vitro study. Drug Metab Dispos. 2013 Apr;41(4):754-62. doi: 10.1124/dmd.112.049148. Epub 2013 Jan 10.
- 1. Chong-Yin Huang, Meng-Ting Zuo, et al. "Hypoxia tolerance determine differential gelsenicine-induced neurotoxicity between pig and mouse." BMC Med 23, 156 (2025)
- 2. Aleksandra Filipiak-Duliban, Klaudia Brodaczewska, et al. "Spheroid Culture Differentially Affects Cancer Cell Sensitivity to Drugs in Melanoma and RCC Models." Int J Mol Sci. 2022 Jan 21;23(3):1166. PMID:35163092
- 3. Natalia Kasica, Piotr Jakubowski, et al. "P-Glycoprotein Inhibitor Tariquidar Plays an Important Regulatory Role in Pigmentation in Larval Zebrafish." Cells. 2021 Mar 20;10(3):690. PMID:33804686
- 4. Mohammadpour R, Safarian S, et al. "Comparative Endocytosis Mechanisms and Anticancer Effect of HPMA Copolymer- and PAMAM Dendrimer-MTCP Conjugates for Photodynamic Therapy." Macromol Biosci. 2016 Oct 25. PMID:27779358
- 5. Sajja, Ravi K., and Luca Cucullo. "Altered glycaemia differentially modulates efflux transporter expression and activity in hCMEC/D3 cell line." Neuroscience letters 598 (2015): 59-65. PMID:25982326
| Physical Appearance | A solid |
| Storage | Store at -20°C |
| M.Wt | 646.73 |
| Cas No. | 206873-63-4 |
| Formula | C38H38N4O6 |
| Synonyms | XR9576, XR 9576, XR-9576,Tariquidar |
| Solubility | insoluble in H2O; insoluble in EtOH; ≥16.17 mg/mL in DMSO |
| Chemical Name | N-[2-[[4-[2-(6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)ethyl]phenyl]carbamoyl]-4,5-dimethoxyphenyl]quinoline-3-carboxamide |
| SDF | Download SDF |
| Canonical SMILES | COC1=C(C=C2CN(CCC2=C1)CCC3=CC=C(C=C3)NC(=O)C4=CC(=C(C=C4NC(=O)C5=CC6=CC=CC=C6N=C5)OC)OC)OC |
| Shipping Condition | Small Molecules with Blue Ice, Modified Nucleotides with Dry Ice. |
| General tips | We do not recommend long-term storage for the solution, please use it up soon. |
| Cell experiment: [1] | |
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Cell lines |
KB-3-1, KB-8-5-11 (ABCB1-expressing variant), MCF-7, MCF-7/VP16 (ABCC1-expressing variant), H460, H460/MX20 (ABCG2-expressing variant) |
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Preparation method |
The solubility of this compound in DMSO is >10 mM. General tips for obtaining a higher concentration: Please warm the tube at 37 °C for 10 minutes and/or shake it in the ultrasonic bath for a while.Stock solution can be stored below -20°C for several months. |
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Reaction Conditions |
≥ 100 nM |
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Applications |
At concentrations ≥ 100 nM, tariquidar inhibited both P-gp and BCRP but did not inhibit MRP1. Accumulation of the fluorescent substrate calcein-AM in ABCB1-expressing cells treated with 100 nM and 1 μM tariquidar increased 14-fold and 19-fold, respectively. Most P-gp was inhibited at 100 nM. At the same concentrations, tariquidar also increased the accumulation of the fluorescent substrate mitoxantrone in ABCG2-expressing cells by 4-fold (P |
| Animal experiment: [2] | |
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Animal models |
NMRI nu/nu mice |
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Dosage form |
Oral administration, 0.1 ml/10 g of body weight |
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Applications |
The ABCB1 modulator tariquidar affects the distribution of paclitaxel in nude mice. In the brains, Co-application of tariquidar with paclitaxel led to a comparable increase in the brain concentration of the cytostatic by a factor of 2.5-to 6.7. In liver, no statistically significant differences were determined between the different ABCB1 modulator group and the control group. In the kidneys, the paclitaxel content in kidney decreased to achieve concentrations similar to those in the untreated control group. |
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Other notes |
Please test the solubility of all compounds indoor, and the actual solubility may slightly differ with the theoretical value. This is caused by an experimental system error and it is normal. |
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References: [1] Kannan P, Telu S, Shukla S, et al. The “specific” P-glycoprotein inhibitor tariquidar is also a substrate and an inhibitor for breast cancer resistance protein (BCRP/ABCG2). ACS chemical neuroscience, 2010, 2(2): 82-89. [2] Hubensack M, Müller C, Höcherl P, et al. Effect of the ABCB1 modulators elacridar and tariquidar on the distribution of paclitaxel in nude mice. Journal of cancer research and clinical oncology, 2008, 134(5): 597-607. |
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| Description | Tariquidar (XR9576) is a potent and selective noncompetitive inhibitor of P-glycoprotein with Kd of 5.1 nM. | |||||
| Targets | P-glycoprotein | |||||
| IC50 | 5.1 nM (Kd) | |||||
Quality Control & MSDS
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