Novel fluorinated antifolates. Enzyme inhibition and cytotoxicity studies on 2'- and 3'-fluoroaminopterin
摘要:
Two novel analogues of aminopterin with a single fluorine substitution in the 2' (compound 8) or in the 3' (compound 9) position of the p-aminobenzoyl group were synthesized and evaluated as inhibitors of dihydrofolate reductase from two bacterial species and from human HeLa cells. The 2'-fluoro compound was bound essentially the same as aminopterin itself, while the 3'-fluoro derivative bound two- to threefold more tightly in all cases. UV spectral shifts indicated normal binding of the pteridine. Cytotoxicity studies against mouse leukemia L1210 cells and the human stomach cancer line HuTu80 indicated equivalent toxicity of the parent drug with the 2'-fluoro analogue. 3'-Fluoroaminopterin was, however, twice as toxic as aminopterin to both cell lines.
Provided herein is are novel fluorine-substituted methotrexates and methods of using magnetic resonance spectroscopy of these novel compounds to determine the sensitivity of or resistance of a tumor to methotrexate. Such methods may be used to predict the efficacy of methotrexate therapy or to devise alternate therapeutic strategies. Also provided are methods of treating tumors sensitive to methotrexate.
4-amino-fluorobenzamides and their use as cytotoxic prodrugs
申请人:Cancer Research Campaign Technology Limited
公开号:US05811454A1
公开(公告)日:1998-09-22
The invention provides a compound which is a 3-fluorobenzamide of the formula (A) ##STR1## wherein R-NH is the residue of an .alpha.-amino acid R-NH.sub.2 or oligopeptide R-NH.sub.2, and M is a nitrogen mustard group of the formula ##STR2## wherein Y and L, which may be the same or different in a molecule, are leaving groups; or a pharmaceutically acceptable salt thereof. The compounds are useful as prodrugs for treating cancer.
4-AMINO-FLUOROBENZAMIDES AND THEIR USE AS CYTOTOXIC PRODRUGS
申请人:CANCER RESEARCH CAMPAIGN TECHNOLOGY LIMITED
公开号:EP0696270B1
公开(公告)日:1998-11-04
US5811454A
申请人:——
公开号:US5811454A
公开(公告)日:1998-09-22
Novel fluorinated antifolates. Enzyme inhibition and cytotoxicity studies on 2'- and 3'-fluoroaminopterin
作者:Jack Henkin、Wendy L. Washtien
DOI:10.1021/jm00362a019
日期:1983.8
Two novel analogues of aminopterin with a single fluorine substitution in the 2' (compound 8) or in the 3' (compound 9) position of the p-aminobenzoyl group were synthesized and evaluated as inhibitors of dihydrofolate reductase from two bacterial species and from human HeLa cells. The 2'-fluoro compound was bound essentially the same as aminopterin itself, while the 3'-fluoro derivative bound two- to threefold more tightly in all cases. UV spectral shifts indicated normal binding of the pteridine. Cytotoxicity studies against mouse leukemia L1210 cells and the human stomach cancer line HuTu80 indicated equivalent toxicity of the parent drug with the 2'-fluoro analogue. 3'-Fluoroaminopterin was, however, twice as toxic as aminopterin to both cell lines.