Specific nonpeptide inhibitors of puromycin-sensitive aminopeptidase with a 2,4(1H,3H)-quinazolinedione skeleton.
Potent, specific, chemically stable and non-peptide/small-molecular inhibitors of puromycin-sensitive aminopeptidase, such as 3-(2,6-diethylphenyl)-2,4(1H,3H)-quinazolinedione (PAQ-22, 5), were prepared by the structural development of a potent PSA inhibitor, 2-(2,6-diethylphenyl)-1,2,3,4-tetrahydroisoquinoline-1,3-dione (PIQ-22, 4). The design was carried out partly by applying electrostatic potential field information obtained from PIQ-22 (4) and its derivatives based on thalidomide (2). This information revealed that a positive electrostatic potential field around the benzylic methylene in the tetrahydroisoquinoline ring is necessary for potent activity. Lineweaver-Burk plot analysis showed that PAQ-22 (5) and its derivatives inhibit puromycin-sensitive aminopeptidase (PSA) in a non-competitive manner. These potent and specific PSA inhibitors showed dose-dependent cell invasion-inhibitory activity in a Matrigel assay using mouse melanoma B16F10/L5 cells, in spite of their low cell toxicity.
Institute of Molecular & Cellular Biosciences, The University of Tokyo, Tokyo, Japan.
Hiroki
H
Kakuta
Aya
A
Tanatani
Kazuo
K
Nagasawa
Yuichi
Y
Hashimoto
D000626:Aminopeptidases / Q000037:antagonists & inhibitors*; D000818:Animals; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor; D004305:Dose-Response Relationship, Drug; D004354:Drug Screening Assays, Antitumor; D004563:Electrochemistry; D006801:Humans; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D009361:Neoplasm Invasiveness / Q000473:pathology; D011480:Protease Inhibitors / Q000138:chemical synthesis* / Q000494:pharmacology*; D011691:Puromycin / Q000494:pharmacology*; D011799:Quinazolines / Q000138:chemical synthesis* / Q000494:pharmacology*; D013329:Structure-Activity Relationship
D011480:Protease Inhibitors; D011799:Quinazolines; D011691:Puromycin; C081989:2,4(1H,3H)-quinazolinedione; D000626:Aminopeptidases