Biomaterial Database

[Multidrug resistance protein (MRP)]. 1997

T Abe, and T Mori, and S Hori, and K Koike, and M Kuwano

Department of Neurosurgery, Oita Medical University.

Two different integral glycoproteins, the 170 kD P-glycoprotein(P-gp) and the 190 kD multidrug resistance protein (MRP), are involved in the acquisition of multidrug resistance phenotypes in cancer cells. These two proteins belong to the ATP-binding cassette (ABC) superfamily but their primary structures are quite dissimilar, sharing only approximately 15% amino acid identity. Nevertheless, MRP and P-gp confer resistance to a similar profile of chemotherapeutic agents. These two proteins seem to play a similar role in the acquirement of multidrug resistance. However, it has recently been demonstrated that MRP can specifically transport the cysteinyl leukotriene, LTC4, and some other glutathione conjugates, suggesting that MRP had a function different from P-gp. This review summarizes the current data on the structural and functional characteristics of MRP, its ability to confer multidrug resistance and its clinical relevance in drug resistant malignant disease.

UI	MeSH Term	Description	Entries
D007473	Ion Channels	Gated, ion-selective glycoproteins that traverse membranes. The stimulus for ION CHANNEL GATING can be due to a variety of stimuli such as LIGANDS, a TRANSMEMBRANE POTENTIAL DIFFERENCE, mechanical deformation or through INTRACELLULAR SIGNALING PEPTIDES AND PROTEINS.	Membrane Channels,Ion Channel,Ionic Channel,Ionic Channels,Membrane Channel,Channel, Ion,Channel, Ionic,Channel, Membrane,Channels, Ion,Channels, Ionic,Channels, Membrane
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001692	Biological Transport	The movement of materials (including biochemical substances and drugs) through a biological system at the cellular level. The transport can be across cell membranes and epithelial layers. It also can occur within intracellular compartments and extracellular compartments.	Transport, Biological,Biologic Transport,Transport, Biologic
D014407	Tumor Cells, Cultured	Cells grown in vitro from neoplastic tissue. If they can be established as a TUMOR CELL LINE, they can be propagated in cell culture indefinitely.	Cultured Tumor Cells,Neoplastic Cells, Cultured,Cultured Neoplastic Cells,Cell, Cultured Neoplastic,Cell, Cultured Tumor,Cells, Cultured Neoplastic,Cells, Cultured Tumor,Cultured Neoplastic Cell,Cultured Tumor Cell,Neoplastic Cell, Cultured,Tumor Cell, Cultured
D017997	Leukotriene C4	The conjugation product of LEUKOTRIENE A4 and glutathione. It is the major arachidonic acid metabolite in macrophages and human mast cells as well as in antigen-sensitized lung tissue. It stimulates mucus secretion in the lung, and produces contractions of nonvascular and some VASCULAR SMOOTH MUSCLE. (From Dictionary of Prostaglandins and Related Compounds, 1990)	LTC4,Leukotriene C,Leukotriene C-1,Leukotriene C-4,Leukotriene C1,Leukotrienes C,Leukotriene C 1,Leukotriene C 4
D018432	Drug Resistance, Multiple	Simultaneous resistance to several structurally and functionally distinct drugs.	Drug Resistance, Extensively,Extensively Drug Resistance,Extensively-Drug Resistance,Multidrug Resistance,Multi-Drug Resistance,Extensively Drug Resistances,Extensively-Drug Resistances,Multiple Drug Resistance,Resistance, Extensively Drug,Resistance, Extensively-Drug,Resistance, Multiple Drug
D018528	ATP-Binding Cassette Transporters	A family of MEMBRANE TRANSPORT PROTEINS that require ATP hydrolysis for the transport of substrates across membranes. The protein family derives its name from the ATP-binding domain found on the protein.	ABC Transporter,ABC Transporters,ATP-Binding Cassette Transporter,ATP Binding Cassette Transporter,ATP Binding Cassette Transporters,Cassette Transporter, ATP-Binding,Transporter, ABC,Transporter, ATP-Binding Cassette,Transporters, ABC,Transporters, ATP-Binding Cassette
D019008	Drug Resistance, Neoplasm	Resistance or diminished response of a neoplasm to an antineoplastic agent in humans, animals, or cell or tissue cultures.	Antibiotic Resistance, Neoplasm,Antineoplastic Drug Resistance,Drug Resistance, Antineoplastic,Antineoplastic Agent Resistance,Neoplasm Drug Resistance,Resistance, Antineoplastic Agent,Resistance, Antineoplastic Drug
D020168	ATP Binding Cassette Transporter, Subfamily B, Member 1	A 170-kDa transmembrane glycoprotein from the superfamily of ATP-BINDING CASSETTE TRANSPORTERS. It serves as an ATP-dependent efflux pump for a variety of chemicals, including many ANTINEOPLASTIC AGENTS. Overexpression of this glycoprotein is associated with multidrug resistance (see DRUG RESISTANCE, MULTIPLE).	ATP-Dependent Translocase ABCB1,MDR1 Protein,MDR1B Protein,Multidrug Resistance Protein 1,P-Glycoprotein,P-Glycoprotein 1,ABCB1 Protein,ATP Binding Cassette Transporter, Sub-Family B, Member 1,ATP-Binding Cassette, Sub-Family B, Member 1,CD243 Antigen,PGY-1 Protein,1, P-Glycoprotein,ABCB1, ATP-Dependent Translocase,ATP Dependent Translocase ABCB1,Antigen, CD243,P Glycoprotein,P Glycoprotein 1,PGY 1 Protein,Protein, MDR1B,Translocase ABCB1, ATP-Dependent
D027425	Multidrug Resistance-Associated Proteins	A sequence-related subfamily of ATP-BINDING CASSETTE TRANSPORTERS that actively transport organic substrates. Although considered organic anion transporters, a subset of proteins in this family have also been shown to convey drug resistance to neutral organic drugs. Their cellular function may have clinical significance for CHEMOTHERAPY in that they transport a variety of ANTINEOPLASTIC AGENTS. Overexpression of proteins in this class by NEOPLASMS is considered a possible mechanism in the development of multidrug resistance (DRUG RESISTANCE, MULTIPLE). Although similar in function to P-GLYCOPROTEINS, the proteins in this class share little sequence homology to the ATP BINDING CASSETTE TRANSPORTER, SUBFAMILY B, MEMBER 1 family of proteins.	Multidrug Resistance-Associated Protein,ATP-Binding Cassette, Sub-Family C Proteins,MOAT Protein,Multispecific Organic Anion Transport Proteins,Multispecific Organic Anion Transporter,ATP Binding Cassette, Sub Family C Proteins,Multidrug Resistance Associated Protein,Multidrug Resistance Associated Proteins,Resistance-Associated Protein, Multidrug