Abstract
The plasma membrane localization of efflux transporters, such as multidrug resistance‑associated protein (MRP/ABCC), is governed by scaffold proteins, such as the ezrin/radixin/moesin (ERM) proteins. Reduction of the anchor function of ERM proteins in tumor cells may decrease the transport activity of efflux transporters, possibly leading to increased intracellular accumulation and efficiency of anticancer drugs as substrates of efflux transporters. The effect of the knockdown of ERM proteins was examined in multiple carcinoma cell lines on the transport activity of efflux transporters and on the intracellular accumulation and efficiency of methotrexate (MTX). Radixin knockdown in human liver cancer HepG2 cells, human lung carcinoma A549 cells, and human breast carcinoma MDA‑MB‑453 cells led to a significant reduction in the transport activity of multidrug resistance‑associated protein 2 (MRP2). The plasma membrane localization of MRP2 was significantly decreased by radixin knockdown in HepG2 cells. Increases in the accumulation and cytotoxicity of MTX in HepG2 cells treated with siRadixin were observed compared with control or siNegative. An in vivo study revealed that siRadixin treatment improved the efficiency of MTX in tumor‑bearing mice. In conclusion, the present study provides information on radixin as a target molecule for the modulation of MRP activity in tumor cells.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
