Apatinib (YN968D1) Reverses Multidrug Resistance by inhibiting the Efflux Function of Multiple ATP-Binding Cassette Transporters

Apatinib, a small-molecule multitargeted tyrosine kinase inhibitor, is in phase III clinical trial for the treatment of patients with non-small-cell lung cancer and gastric cancer in China. In this study, we determined the effect of apatinib on the interaction of specific antineoplastic compounds wi...

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Published in:	Cancer research (Chicago, Ill.) Ill.), 2010-10, Vol.70 (20), p.7981-7991
Main Authors:	MI, Yan-Jun, LIANG, Yong-Ju, MA, Xiao-Xu, TO, Kenneth Kin Wah, AMBUDKAR, Suresh V, CHEN, Zhe-Sheng, FU, Li-Wu, HUANG, Hong-Bing, ZHAO, Hong-Yun, WU, Chung-Pu, FANG WANG, TAO, Li-Yang, ZHANG, Chuan-Zhao, DAI, Chun-Ling, TIWARI, Amit K
Format:	Article
Language:	eng
Subjects:	Adenosine Triphosphatases - drug effects Adenosine Triphosphatases - metabolism Animals Antineoplastic agents ATP Binding Cassette Transporter, Sub-Family B ATP-Binding Cassette Transporters - antagonists & inhibitors ATP-Binding Cassette Transporters - drug effects ATP-Binding Cassette, Sub-Family B, Member 1 - drug effects ATP-Binding Cassette, Sub-Family B, Member 1 - metabolism Biological and medical sciences Breast Neoplasms Cell Line, Tumor Cell Survival - drug effects Doxorubicin - pharmacology Drug Resistance, Multiple - drug effects Enzyme Inhibitors - pharmacology Female Humans Medical sciences Mice Mice, Inbred BALB C Mice, Nude Pharmacology. Drug treatments Protein-Tyrosine Kinases - antagonists & inhibitors Pyridines - therapeutic use Reverse Transcriptase Polymerase Chain Reaction Transplantation, Heterologous Tumors
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Summary:	Apatinib, a small-molecule multitargeted tyrosine kinase inhibitor, is in phase III clinical trial for the treatment of patients with non-small-cell lung cancer and gastric cancer in China. In this study, we determined the effect of apatinib on the interaction of specific antineoplastic compounds with P-glycoprotein (ABCB1), multidrug resistance protein 1 (MRP1, ABCC1), and breast cancer resistance protein (BCRP, ABCG2). Our results showed that apatinib significantly enhanced the cytotoxicity of ABCB1 or ABCG2 substrate drugs in KBv200, MCF-7/adr, and HEK293/ABCB1 cells overexpressing ABCB1 and in S1-M1-80, MCF-7/FLV1000, and HEK293/ABCG2-R2 cells overexpressing ABCG2 (wild-type). In contrast, apatinib did not alter the cytotoxicity of specific substrates in the parental cells and cells overexpressing ABCC1. Apatinib significantly increased the intracellular accumulation of rhodamine 123 and doxorubicin in the multidrug resistance (MDR) cells. Furthermore, apatinib significantly inhibited the photoaffinity labeling of both ABCB1 and ABCG2 with [(125)I]iodoarylazidoprazosin in a concentration-dependent manner. The ATPase activity of both ABCB1 and ABCG2 was significantly increased by apatinib. However, apatinib, at a concentration that produced a reversal of MDR, did not significantly alter the ABCB1 or ABCG2 protein or mRNA expression levels or the phosphorylation of AKT and extracellular signal-regulated kinase 1/2 (ERK1/2). Importantly, apatinib significantly enhanced the effect of paclitaxel against the ABCB1-resistant KBv200 cancer cell xenografts in nude mice. In conclusion, apatinib reverses ABCB1- and ABCG2-mediated MDR by inhibiting their transport function, but not by blocking the AKT or ERK1/2 pathway or downregulating ABCB1 or ABCG2 expression. Apatinib may be useful in circumventing MDR to other conventional antineoplastic drugs.
ISSN:	0008-5472 1538-7445