title: Synthesis and in vitro screening of novel N-benzyl aplysinopsin analogs as potential anticancer agents.
abstract: A series of novel substituted (Z)-5-((1-benzyl-1H-indol-3-yl)methylene)imidazolidin-2,4-diones (3a-f) and (Z)-5-((1-benzyl-1H-indol-3-yl)methylene)-2-iminothiazolidin-4-ones (3g-o) have been synthesized utilizing microwave irradiation. These analogs were evaluated for in vitro cytotoxicity against a panel of 60 human tumor cell lines. Compound 3i exhibits potent growth inhibition against melanoma UACC-257 (GI(50)=13.3 nM) and OVCAR-8 ovarian (GI(50)=19.5 nM) cancer cells while possessing significant cytotoxicity (LC(50)=308 nM and LC(50)=851 nM, respectively) against the same cell lines within this series of compounds. A second analog, 3a, had GI(50) values of 307 and 557 nM against SK-MEL-2 melanoma and A498 renal cancer cell lines, and exhibited GI(50) values ranging from 0.30 to 6 μM against 98% of all cancer cell lines in the 60-cell panel. Thus, (Z)-5-((5-chloro-1-(4-fluorobenzyl)-1H-indol-3-yl)methylene)-2-iminothiazolidin-4-one (3i) and (Z)-methyl 1-(4-cyanobenzyl)-3-((2,5-dioxoimidazolidin-4-ylidene)methyl)-1H-indole-6-carboxylate (3a) can be regarded as useful lead compounds for further structural optimization as antitumor agents.
authors.affiliation: Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA.
authors.forename: Narsimha Reddy
authors.initials: NR
authors.lastname: Penthala
authors.forename: Thirupathi Reddy
authors.initials: TR
authors.lastname: Yerramreddy
authors.forename: Peter A
authors.initials: PA
authors.lastname: Crooks
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D004354:Drug Screening Assays, Antitumor; D005260:Female; D006801:Humans; D015394:Molecular Structure; D014364:Tryptophan / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000970:Antineoplastic Agents; C015685:aplysinopsin; D014364:Tryptophan