title: Intracellular trafficking of MDR transporters and relevance of SNPs.
abstract: Multi-drug resistance (MDR) frequently contributes to the failure of chemotherapeutic treatments in cancer patients. Mechanisms underlying the development of MDR have been extensively studied and are considered multifactorial. Among them, the ATP-Binding Cassette (ABC) family of proteins plays a pivotal role. Processes of cellular distribution and subcellular localization of MDR-ABC proteins are not yet well explored and to enlighten these topics could be crucial to understand cellular drug uptake and retention. In this review, we analysed literature data concerning i) intracellular trafficking of MDR-ABC proteins (BCRP, P-gp and MRP1) and ii) mechanisms altering their cellular localization and trafficking. Moreover, we describe single nucleotide polymorphisms (SNP) that have been reported for some multidrug resistance (MDR) transporters, such as BCRP and P-gp, emphasizing their ability to affect the expression, function and localization of the transporters, with implications on drug resistance phenotypes.
authors.affiliation: Clinical Experimental Oncology Laboratory, National Cancer Institute, Via Hahnemann, 10-70126 Bari, Italy.
authors.forename: Letizia
authors.initials: L
authors.lastname: Porcelli
authors.forename: Clara
authors.initials: C
authors.lastname: Lemos
authors.forename: Godefridus J
authors.initials: GJ
authors.lastname: Peters
authors.forename: Angelo
authors.initials: A
authors.lastname: Paradiso
authors.forename: Amalia
authors.initials: A
authors.lastname: Azzariti
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics / Q000378:metabolism; D018528:ATP-Binding Cassette Transporters / Q000235:genetics / Q000378:metabolism; D000818:Animals; D018432:Drug Resistance, Multiple / Q000235:genetics; D006801:Humans; D008954:Models, Biological; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000032:analysis / Q000235:genetics* / Q000378:metabolism; D020641:Polymorphism, Single Nucleotide
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D018528:ATP-Binding Cassette Transporters; D027425:ATP-Binding Cassette, Sub-Family C Proteins