Related Experiment Video

Updated: May 25, 2026

Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence
10:09

Methods for Evaluating the Role of c-Fos and Dusp1 in Oncogene Dependence

Published on: January 7, 2019

Functional characterization of protein variants of the human multidrug transporter ABCC2 by a novel targeted

Rudolf Arlanov1, Andrew Porter, Dennis Strand

  • 1Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany.

Human Mutation
|February 1, 2012
PubMed

Insights

This study introduces a new method to test how genetic changes in the multidrug resistance-associated protein 2 (MRP2/ABCC2) affect its function, identifying key variants for further clinical research.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • The multidrug resistance-associated protein 2 (MRP2/ABCC2) is crucial for drug transport, but the functional impact of its variants is unclear.
  • Existing in vitro assays may have limitations in accurately assessing ABCC2 variant functionality.

Purpose of the Study:

  • To systematically evaluate the functional consequences of nonsynonymous ABCC2 variants.
  • To establish a reliable method for characterizing ABCC2 variants for clinical relevance.

Main Methods:

  • Utilized novel "Screen and Insert" (ScIn) technology for stable, reproducible expression of 13 ABCC2 variants in HT1080 cells.
  • Employed Western blotting to assess protein expression levels.
  • Measured substrate transport using glutathione-methylfluorescein (GS-MF) and glutathione-monochlorobimane (GS-MCB).

Main Results:

  • Identified specific ABCC2 variants (D333G, R1174H, R1181L) with reduced protein expression.
  • Observed mislocalization of the R1174H variant to the cytoplasm.
  • Quantified decreased transport activity for GS-MF and GS-MCB across various variants, with some discrepancies between protein expression and transport data for the V1188E/C1515Y double variant.

Conclusions:

  • The ScIn approach provides a feasible and reliable platform for functional characterization of ABCC2 variants.
  • Several ABCC2 variants (D333G, R1174H, R1181L, N1244K, P1291L, V1188E/C1515Y) show potential for further clinical evaluation due to altered expression or transport functions.

More Related Videos

Analyzing Tumor and Tissue Distribution of Target Antigen Specific Therapeutic Antibody07:36

Analyzing Tumor and Tissue Distribution of Target Antigen Specific Therapeutic Antibody

Published on: May 16, 2020

Methods to Discover Alternative Promoter Usage and Transcriptional Regulation of Murine Bcrp111:02

Methods to Discover Alternative Promoter Usage and Transcriptional Regulation of Murine Bcrp1

Published on: May 27, 2016

Related Concept Videos

ABC Transporters: Exporter01:31

ABC Transporters: Exporter

ATP-binding cassette or ABC transporter is the largest superfamily of integral membrane proteins. The transporters have transmembrane-binding domains (TMDs) and nucleotide-binding domains (NBDs). The TMDs are specific to their substrates, whereas the NBDs are similar to engines that complete ATP hydrolysis to complete the substrate transport. They can be full transporters consisting of two TMDs and NBDs, half transporters with one TMD and NBD, while some encoded with a single TMD or NBD are...
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...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
ABC Transporters: Importer01:27

ABC Transporters: Importer

ATP-binding cassette or ABC transporters are a class of ATP-driven pumps that hydrolyze ATP to move solutes across the membrane. They can be grouped into importers and exporters. While exporters are present in all domains of life, importers exist only in bacteria and some plants.
In bacteria, based on the number of transmembrane helices and the chemical nature of their substrates, the ABC importers can be divided into three types:
Carrier-Mediated Transport01:06

Carrier-Mediated Transport

Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...