title: Structure-activity relationship studies of chalcone leading to 3-hydroxy-4,3',4',5'-tetramethoxychalcone and its analogues as potent nuclear factor kappaB inhibitors and their anticancer activities.
abstract: Chalcone is a privileged structure, demonstrating promising anti-inflammatory and anticancer activities. One potential mechanism is to suppress nuclear factor kappa B (NF-kappaB) activation. The structures of chalcone-based NF-kappaB inhibitors vary significantly that there is minimum information about their structure-activity relationships (SAR). This study aims to establish SAR of chalcone-based compounds to NF-kappaB inhibition, to explore the feasibility of developing simple chalcone-based potent NF-kappaB inhibitors, and to evaluate their anticancer activities. Three series of chalcones were synthesized in one to three steps with the key step being aldol condensation. These candidates demonstrated a wide range of NF-kappaB inhibitory activities, some of low micromolar potency, establishing that structural complexity is not required for NF-kappaB inhibition. Lead compounds also demonstrate potent cytotoxicity against lung cancer cells. Their cytotoxicities correlate moderately well with their NF-kappaB inhibitory activities, suggesting that suppressing NF-kappaB activation is likely responsible for at least some of the cytotoxicities. One lead compound effectively inhibits lung tumor growth with no signs of adverse side effects.
authors.affiliation: Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, USA.
authors.forename: Balasubramanian
authors.initials: B
authors.lastname: Srinivasan
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Johnson
authors.forename: Rahul
authors.initials: R
authors.lastname: Lad
authors.forename: Chengguo
authors.initials: C
authors.lastname: Xing
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry* / Q000494:pharmacology* / Q000627:therapeutic use; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002471:Cell Transformation, Neoplastic; D002599:Chalcone / Q000031:analogs & derivatives / Q000737:chemistry* / Q000494:pharmacology* / Q000627:therapeutic use; D047188:Chalcones / Q000737:chemistry* / Q000494:pharmacology* / Q000627:therapeutic use; D005260:Female; D017930:Genes, Reporter; D006801:Humans; D051550:I-kappa B Kinase / Q000037:antagonists & inhibitors; D020128:Inhibitory Concentration 50; D053592:Interleukin-1 Receptor-Associated Kinases / Q000037:antagonists & inhibitors; D008156:Luciferases / Q000378:metabolism; D008175:Lung Neoplasms / Q000188:drug therapy / Q000473:pathology; D051379:Mice; D008819:Mice, Nude; D016328:NF-kappa B / Q000037:antagonists & inhibitors* / Q000235:genetics / Q000378:metabolism; D013329:Structure-Activity Relationship; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: C545687:3-hydroxy-4,3',4',5'-tetramethoxychalcone; D000970:Antineoplastic Agents; D047188:Chalcones; D016328:NF-kappa B; D014409:Tumor Necrosis Factor-alpha; D002599:Chalcone; D008156:Luciferases; D053592:Interleukin-1 Receptor-Associated Kinases; D051550:I-kappa B Kinase