Potential antitumor agents. 45. Synthesis, DNA-binding interaction, and biological activity of triacridine derivatives
摘要:
A series of amide-linked triacridines of varying interchromophore separation were synthesized as potential DNA trisintercalating agents. The corresponding diamide diacridines (lacking the central chromophore) were also prepared, and the DNA-binding and biological activities of both series of compounds were evaluated. Although one of the triacridines shows evidence of a trisintercalative binding mode, most of the triacridines (and all the diacridines) bound by bisintercalation. The diacridines showed great cytotoxicity and higher DNA association constants than the corresponding 9-[[3-(dimethylamino)propyl]amino]acridine monomer, but addition of a third chromophore did not provide corresponding increases in either DNA affinity, inhibition of RNA synthesis, or cytotoxicity. Some members of both series show minimal in vivo antileukemic activity. The results suggest that further development of trimeric molecules as potential antitumor agents should focus on smaller chromophores with lower capacity for nonspecific binding and/or the employment of rigid linker chains to provide true molecular "staples" for DNA.
Potential antitumor agents. 45. Synthesis, DNA-binding interaction, and biological activity of triacridine derivatives
摘要:
A series of amide-linked triacridines of varying interchromophore separation were synthesized as potential DNA trisintercalating agents. The corresponding diamide diacridines (lacking the central chromophore) were also prepared, and the DNA-binding and biological activities of both series of compounds were evaluated. Although one of the triacridines shows evidence of a trisintercalative binding mode, most of the triacridines (and all the diacridines) bound by bisintercalation. The diacridines showed great cytotoxicity and higher DNA association constants than the corresponding 9-[[3-(dimethylamino)propyl]amino]acridine monomer, but addition of a third chromophore did not provide corresponding increases in either DNA affinity, inhibition of RNA synthesis, or cytotoxicity. Some members of both series show minimal in vivo antileukemic activity. The results suggest that further development of trimeric molecules as potential antitumor agents should focus on smaller chromophores with lower capacity for nonspecific binding and/or the employment of rigid linker chains to provide true molecular "staples" for DNA.
Novel therapeutic agents for membrane transporters
申请人:——
公开号:US20030044845A1
公开(公告)日:2003-03-06
Novel multi-binding compounds (agents) are disclosed which bind cell membrane transporters including ion channels, molecular transporters and ion pumps. The compounds of this invention comprise from 2 to 10 ligands each of which can bind to such cellular transporters to modulate the biological processes/functions thereof. Each of the ligands is covalently attached to a linker (framework) to provide for a multi-binding compound. The linker is selected such that the multi-binding compound exhibits increased modulation of the biological processes/functions of the transporter as compared to the aggregate of the individual ligand units made available for binding to the transporter.
Novel therapeutic agents for macromolecular structures
申请人:——
公开号:US20030060663A1
公开(公告)日:2003-03-27
Disclosed are novel multibinding compounds (agents) which bind macromolecular structures including cellular, extracellular, and microbial components derived from vectors, viruses, fungi, yeasts, bacteria, and the like. The compounds of this invention comprise a plurality of ligands each of which can bind to such macromolecular structures thereby modulating the biological processes/functions thereof. Each of the ligands is covalently attached to a linker (framework) to provide for the multibinding compound. The linker is selected such that the multibinding compound so constructed demonstrates increased modulation or disruption of the biological processes/functions of cell as compared to the aggregate of the individual units of the ligand.
Methods for identifying novel multimeric agents that modulate receptors
申请人:——
公开号:US20030087306A1
公开(公告)日:2003-05-08
Disclosed are novel multi-binding compounds (agents) which bind cellular receptors. The compounds of this invention comprise a plurality of ligands each of which can bind to such cellular receptors thereby modulating the biological processes/functions thereof. Each of the ligands is covalently attached to a linker or linkers which may be the same of different to provide for the multi-binding compound. The linker is selected such that the multi-binding compound so constructed demonstrates increased modulation or disruption of the biological processes/functions of the cell. Also disclosed is a method for identifying such novel multi-binding compounds which bind cellular receptors and a method for generating a mixture of such novel multi-binding compounds.
Novel therapeutic agents that modulate enzymatic processes
申请人:——
公开号:US20040023290A1
公开(公告)日:2004-02-05
Novel multi-binding compounds are disclosed that modulate enzymatic processes. The compounds of the invention comprise from 2-10 ligands covalently connected, each of said ligands being capable of binding to an enzyme, enzyme substrate or enzyme cofactor thereby modulating the biological processes/functions thereof.