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Related Concept Videos

The ABO Blood Group01:12

The ABO Blood Group

The ABO blood group system is a critical element of transfusion medicine, essential for determining blood compatibility in transfusions and organ transplants. It is based on specific antigens, or agglutinogens, present on the surface of red blood cells (RBCs) and corresponding antibodies, or agglutinins, in the blood plasma.
Antigens in the ABO Blood Group System
Antigens are substances that can trigger an immune response, leading to the production of antibodies. In the ABO blood group system,...
Blood Studies I: ABG and VBG01:26

Blood Studies I: ABG and VBG

Blood studies are critical in the medical field, enabling healthcare professionals to assess a patient's health status accurately. This page will focus on two significant blood studies: Arterial Blood Gas (ABG) and Venous Blood Gas (VBG).
Arterial Blood Gas (ABG)
Arterial Blood Gas (ABG) studies are crucial for assessing the lungs' ability to supply oxygen and remove carbon dioxide, reflecting the patient's ventilation status. They also help understand the kidneys' capacity to reabsorb or...
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:
Blood Transfusion01:15

Blood Transfusion

Blood transfusion is a critical medical procedure that saves lives and treats various medical conditions. It involves transferring blood from a donor to a recipient. This process requires a thorough understanding of the ABO blood group system and its associated antigens and antibodies.
Blood Transfusion Overview
A blood transfusion is a medical procedure used to replace blood lost due to injury, surgery, or to treat conditions such as anemia or cancer. During a transfusion, donor blood is...
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...
Blood Typing01:10

Blood Typing

Understanding an individual's blood group is a critical component of transfusion medicine. It ensures compatibility in blood transfusions, organ transplants, and even during pregnancy. Determining these blood groups involves the ABO and Rh blood typing systems, utilizing specific antigens and corresponding anti-sera to identify an individual's blood type.
Antigens are protein molecules that reside on the surface of red blood cells (RBCs). The ABO and Rh blood typing systems target antigens A,...

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Related Experiment Video

Updated: Jun 26, 2026

ABCG5/G8 Crystallization in a Lipidic Bicelle Environment for X-Ray Crystallography
06:47

ABCG5/G8 Crystallization in a Lipidic Bicelle Environment for X-Ray Crystallography

Published on: August 25, 2023

ABCG2: a perspective.

Robert W Robey1, Kenneth K K To, Orsolya Polgar

  • 1Medical Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.

Advanced Drug Delivery Reviews
|January 13, 2009
PubMed
Summary
This summary is machine-generated.

Breast cancer resistance protein (BCRP), or ABCG2, is vital for xenobiotic protection and drug transport. Further research is needed to understand its epigenetic regulation and role in cancer drug resistance.

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Area of Science:

  • Biochemistry
  • Pharmacology
  • Toxicology

Background:

  • ABCG2 (breast cancer resistance protein) is an ABC transporter with significant expression in normal tissues like the brain, gut, and placenta.
  • It plays a crucial role in protecting against xenobiotics, regulating drug bioavailability, and forming biological barriers.
  • ABCG2 is also found in stem cells, suggesting a role in xenobiotic protection within these populations.

Purpose of the Study:

  • To explore the epigenetic regulation of ABCG2.
  • To investigate the role of ABCG2 in cancer drug resistance and its potential as a therapeutic target.
  • To understand the physiological significance of ABCG2 through substrate and inhibitor studies, genetic variations, and knockout models.

Main Methods:

  • Review of existing literature on ABCG2 function, expression, and regulation.
  • Analysis of studies involving ABCG2 substrates and inhibitors, including chemotherapy drugs and flavonoids.
  • Examination of research utilizing polymorphic variants in humans and murine knockout models.

Main Results:

  • ABCG2's broad substrate range highlights its importance in xenobiotic transport and normal physiology.
  • Endogenous ABCG2 expression in some cancers may reflect the cell of origin and contribute to intrinsic drug resistance.
  • Epigenetic regulation of ABCG2 is an emerging area of research, with limited understanding to date.

Conclusions:

  • ABCG2 is a critical transporter with diverse physiological roles.
  • Further research into ABCG2's epigenetic regulation and its specific contribution to cancer drug resistance is warranted.
  • Understanding ABCG2's function through pharmacological and toxicological studies will enhance our knowledge of its physiological importance.