ATP-binding cassette efflux transporters and MDR in cancer

Manasi S Pote1, Rajesh N Gacche1

  • 1Tumor Biology Laboratory, Department of Biotechnology, Savitribai Phule Pune University, Pune 411 007, MS, India.

Drug Discovery Today
|February 21, 2023
PubMed

Insights

Multidrug resistance (MDR) in cancer is often caused by ATP binding cassette (ABC) transporters. This review details ABC transporter functions and modulators to overcome MDR and improve cancer treatment efficacy.

Area of Science:

  • Biochemistry
  • Pharmacology
  • Oncology

Background:

  • Multidrug resistance (MDR) significantly limits anticancer drug efficacy.
  • ATP binding cassette (ABC) transporters are key mediators of MDR by actively effluxing drugs from cancer cells.

Purpose of the Study:

  • To provide an updated review on the structure, function, and regulation of major MDR-related ABC transporters.
  • To discuss the role of modulators in overcoming ABC transporter-mediated MDR.
  • To highlight the potential of ABC transporters as therapeutic targets for improved cancer treatment.

Main Methods:

  • Literature review of major MDR-related ABC transporters (P-glycoprotein, MRP1, BCRP).
  • Analysis of the effects of various modulators on ABC transporter functions.
  • Discussion of clinical implications and future strategies for ABC transporter inhibitor development.

Main Results:

  • Detailed overview of the structure and function of key MDR-associated ABC transporters.
  • Identification and categorization of different classes of ABC transporter modulators.
  • Exploration of the therapeutic potential of targeting ABC transporters to combat drug resistance.

Conclusions:

  • ABC transporters are critical targets for overcoming MDR in cancer therapy.
  • Modulators of ABC transporters offer a promising strategy to enhance the effectiveness of existing anticancer drugs.
  • Further research and strategic planning are needed to translate ABC transporter inhibitors into clinical practice.

Related Concept Videos

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...
488
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...
4.5K
Treatment Resistant Cancers02:56

Treatment Resistant Cancers

Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
3.4K
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:
2.8K
Membrane Transporters01:31

Membrane Transporters

Transporters are essential membrane transport proteins with functions related to cell nutrition, homeostasis, communication, etc. Approximately 7% of all genes in the human genome code for transporters or transporter-related proteins.
Transporters are mainly composed of alpha-helices, built from bundles of ten or more helices traversing the plasma membrane. The solute-binding sites are located midway, where some of the helices are broken or distorted, making space for the binding site through...
11.9K
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
14.7K