title: Synthesis and structure-activity relationship of botryllamides that block the ABCG2 multidrug transporter.
abstract: In previous work, botryllamides discovered from the marine ascidian Botryllus tyreus were characterized as selective inhibitors of the ABCG2 multidrug transporter. However, the structural basis for this activity could not be established. In this study, botryllamide F, the core botryllamide structure, and botryllamide G, the most potent botryllamide ABCG2 inhibitor, were synthesized along with a series of structural variants for evaluation of structure-activity relationships. The biological activity of synthetic botryllamide analogs implied that the 2-methoxy-p-coumaric acid portion, and the degree of double bond conjugation within this group, were critical for inhibition of ABCG2. However, variations in the substituents on the two aryl groups did not appear to significantly impact the potency or degree of inhibition.
authors.affiliation: Laboratory of Microbial Chemistry, College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577, Japan. takada@ph.ritsumei.ac.jp
authors.forename: Kentaro
authors.initials: K
authors.lastname: Takada
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Imamura
authors.forename: Kirk R
authors.initials: KR
authors.lastname: Gustafson
authors.forename: Curtis J
authors.initials: CJ
authors.lastname: Henrich
mesh_terms: D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters / Q000037:antagonists & inhibitors*; D000178:Acrylamides / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D000818:Animals; D003373:Coumaric Acids / Q000737:chemistry; D006801:Humans; D015394:Molecular Structure; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000037:antagonists & inhibitors*; D009363:Neoplasm Proteins / Q000037:antagonists & inhibitors*; D010636:Phenols / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D011422:Propionates; D013329:Structure-Activity Relationship
chemical_list: D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters; D000178:Acrylamides; D003373:Coumaric Acids; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D009363:Neoplasm Proteins; D010636:Phenols; D011422:Propionates; C116614:ABCG2 protein, human; C549642:botryllamide F; C549643:botryllamide G; C495469:p-coumaric acid