Related Experiment Video

Updated: Jul 14, 2026

Methods to Study Mrp4-containing Macromolecular Complexes in the Regulation of Fibroblast Migration
10:43

Methods to Study Mrp4-containing Macromolecular Complexes in the Regulation of Fibroblast Migration

Published on: May 19, 2016

MDR1/P-glycoprotein and MRP-1 mRNA and protein expression in non-small cell lung cancer

S Roy1, E Kenny, S Kennedy

  • 1St. Vincent's University Hospital, Dublin 4, Ireland.

Anticancer Research
|June 28, 2007
PubMed
Abstract

Insights

Drug efflux pumps, MDR1 and MRP-1, are frequently expressed in non-small cell lung cancer (NSCLC). Further research is needed to understand their role in multiple drug resistance (MDR) in NSCLC.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Multiple drug resistance (MDR) poses a significant challenge in treating non-small cell lung carcinomas (NSCLC).
  • Drug efflux pumps, such as MDR1 and MRP-1, are implicated in conferring MDR in various cancers.

Purpose of the Study:

  • To investigate the prevalence of MDR1 and MRP-1 gene and protein expression in NSCLC.
  • To determine the relative expression levels of these drug efflux pumps at both mRNA and protein levels.

Main Methods:

  • Analysis of 38 NSCLC tumor specimens using immunohistochemistry.
  • Reverse-transcription polymerase chain reaction (RT-PCR) was performed on 30 of these specimens.

Main Results:

  • Both MDR1 and MRP-1 drug efflux pumps were frequently expressed in NSCLC.
  • MRP-1 mRNA expression was more prevalent than MDR1 mRNA.
  • MDR1 P-glycoprotein (P-gp) protein was detected more frequently than MRP-1 protein.
  • Discrepancies between mRNA and protein detection suggest potential differences in assay sensitivity.

Conclusions:

  • Drug efflux pumps MDR1 and MRP-1 are commonly expressed in NSCLC, contributing to multiple drug resistance.
  • Further investigation using sensitive qPCR and protein analysis in larger cohorts is warranted to clarify their precise role in NSCLC MDR.

Related Concept Videos

Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters01:16

Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters

The pharmacogenetics of drug transporters is increasingly recognized as a critical factor influencing interindividual variability in drug absorption, distribution, and elimination. These membrane-bound proteins regulate drugs' movement across cellular barriers by actively pumping them out (efflux) or facilitating their uptake (influx). Among the major transporter families, ATP-binding cassette (ABC) and solute carrier (SLC) transporters play particularly prominent roles. Genetic polymorphisms...