title: Phenylsulfonylfuroxans as modulators of multidrug-resistance-associated protein-1 and P-glycoprotein.
abstract: A series of furoxan derivatives were studied for their ability to interact with P-gp and MRP1 transporters in MDCK cells overexpressing these proteins. 3-Phenylsulfonyl substituted furoxans emerged as the most interesting compounds. All of them were capable of inhibiting P-gp, and a few also were capable of inhibiting MRP1. Substituents at the 4-position of 3-phenylsulfonylfuroxan scaffold were able to modulate the selectivity and the intensity of inhibition. In some cases, they reverted MRP1 inhibitor activity, namely, they were capable of potentiating MRP1 dependent efflux. When compounds 16 and 17 were coadministered with doxorubicin, they restored a high degree of the activity of the antibiotic. Preliminary immunoblotting studies carried out on these two compounds indicate that they are capable of nitrating P-gp, which in this form is likely unable to efflux the antibiotic.
authors.affiliation: Dipartimento di Scienza e Tecnologia del Farmaco, Universita degli Studi di Torino, Torino, Italy.
authors.forename: Roberta
authors.initials: R
authors.lastname: Fruttero
authors.forename: Marco
authors.initials: M
authors.lastname: Crosetti
authors.forename: Konstantin
authors.initials: K
authors.lastname: Chegaev
authors.forename: Stefano
authors.initials: S
authors.lastname: Guglielmo
authors.forename: Alberto
authors.initials: A
authors.lastname: Gasco
authors.forename: Francesco
authors.initials: F
authors.lastname: Berardi
authors.forename: Mauro
authors.initials: M
authors.lastname: Niso
authors.forename: Roberto
authors.initials: R
authors.lastname: Perrone
authors.forename: Maria Antonietta
authors.initials: MA
authors.lastname: Panaro
authors.forename: Nicola Antonio
authors.initials: NA
authors.lastname: Colabufo
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000502:physiology*; D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D004285:Dogs; D004317:Doxorubicin / Q000494:pharmacology; D004347:Drug Interactions; D018432:Drug Resistance, Multiple / Q000187:drug effects*; D019008:Drug Resistance, Neoplasm / Q000187:drug effects*; D010069:Oxadiazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D013329:Structure-Activity Relationship; D013450:Sulfones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
chemical_list: C551937:4-butoxy-3-phenylsulfonylfuroxan; C551938:4-hexyloxy-3-phenylsulfonylfuroxan; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000970:Antineoplastic Agents; D010069:Oxadiazoles; D013450:Sulfones; C010166:furoxans; D004317:Doxorubicin