Ssayed as described. Total RNA , the RNA extraction and RT-PCR. The PCR primers were listed below: 1 ABCB1 first five, ATC CCC GCA GCA att ata gg 3 and 5 gtt caa act cct tct gct ga 3, 2, 5 ABCG2 primers, ctg tca tgg tgg ctt cag ta 3 and 5, gcc TGA ACG TTC TTC CAC aa 3, 5 and 3 GAPDH primers, CTT TGG TAT CGT GGA AGG A 3, and 5, CAC CCT GTT TH-302 P450 Inhibitors GCT GTA GCC third The products were separated by gel electrophoresis. The cells were lysed Western blot analysis after washing twice with ice-cold PBS. The protein concentration was determined using the Bradford method. Equal amounts of protein were separated by SDS-PAGE, transferred to nitrocellulose membranes and the chemiluminescence was used to detect the protein.
ABCB1 and ABCG2 ATPase assay ATPase ABCB1 and ABCG2 Vargatef FGFR inhibitor Vi BeFx sensitive membrane vesicles of High Five insect cells was measured as described above. Apatinib added and at 37 for the duration of the experiment. The ATPase reaction was initiated by addition of 5 mM Mg ATP in the entire reaction mixture initiated by 0.1 ml. After incubation at 37 20, the reactions were terminated by adding 0.1 ml of 5% SDS. The inorganic phosphate was released as previously described affinity Tsmarkierung of ABCB1 and ABCG2 was performed with the photo IAAP Photoaffinit Tsmarkierung of ABCB1 or ABCG2 with IAAP measured as previously described. ABCB1 was with antique Rpern immunpr Zipitiert C219, w While ABCG2 was performed using the antique Rpers immunpr zipitiert BXP21.
The samples were subjected to SDS-PAGE gel using a 7% NuPAGE Tris-acetate, dried with Bio Max MR film subjected 0 for 3-5 h, the radioactivity ABCB1 or ABCG2 band in t was incorporated with the 860th PhosphorImager Storm system and ImageQuant Statistical analysis All experiments were repeated at least three times, and differences were analyzed by Student’s r-test. Statistical significance was set at p 0.05. Results Apatinib reverse MDR in cells overexpressing ABCB1 and ABCG2 apatinib The cytotoxicity T determined in various cell lines by the MTT assay. IC50 values were 15.18 0.63 11.95 0.69 17.16 0.25 14.54 0.26 9.30 0.72 11.91 0.32 19.13 1.13 M and for KB , KBv200, MCF-7, MCF 7/adr, S1, S1 M1 80, MCF-7 / FLV1000 cells. Support for HEK293/pcDNA3.1, HEK/ABCB1, HEK / ABCG2 and R2 HEK293/ABCC1 cells, the IC50 values of 30 m on the cytotoxicity apatinib t curves apatinib used at a maximum concentration 3.
0 M, a concentration at which more than 90% of the cells in all cell lines used in the study lebensf MDR reversal were hig. The IC50 values of anticancer drugs in sensitive and resistant cells to different concentrations of apatinib are shown in Table 1. Apatinib has entered Born a konzentrationsabh Independent decrease in IC 50 values of 1 DOX and paclitaxel in Mi et al. Page 5 Cancer Res Author manuscript, increases available in PMC 15th October 2011. PA Author Manuscript NIH-PA Author Manuscript NIH Author Manuscript NIH-PA cells, KBv200 DOX in MCF 7/adr, 2 mitoxantrone and topotecan in S1 M1 80 3 cells and mitoxantrone in MCF 7/FLV1000. In addition, 3 M completely apatinib YOUR BIDDING reversed ABCG2-mediated resistance to mitoxantrone and SN 38 in transfected wild-type cells with ABCG2 HEK293/ABCG2 R2. In addition, 3M apatinib Signif