Aromatic Quinolinecarboxamides as Selective, Orally Active Antibody Production Inhibitors for Prevention of Acute Xenograft Rejection
摘要:
The prevention of xenograft rejection is substantially dependent on inhibiting antibodies (Ab) produced by B-cells independently of T-cell signals (TI-1). Due to their ubiquitous biochemical mechanisms of action, the immunosuppressants currently employed not only fail to discriminate between B- and T-cells but also have a narrow therapeutic window and, thus, their prolonged use in complex immunosuppressive regimens is problematic. By capitalizing on the target enzyme-bound (DHODH) structure Ib of one of these compounds, leflunomide, and modulating part of its multiple mechanisms of action to gain selectivity, the quinoline-8-carboxamide 3 was designed as a potentially weak enzyme inhibitor but effective immunosuppressant. Compound 3 fulfilled the mechanistic criteria set and had 10-fold B-cell over T-cell selectivity. Its pyridyl analogue 4 was found to be a highly potent and selective B-cell immunosuppressant with a 75-fold selectivity for B- over T-cells las judged by the MLR data) and no general cytotoxicity at concentrations up to 160-fold higher than those required to inhibit B-cells. In the mouse, 4 effectively blocked TI-1 Ab production and suppressed Ab-mediated xenograft rejection in a xenotransplantation model under a once-daily dosing regimen, with efficacy down to 0.3 mg/kg/day po. These are the first data demonstrating the feasibility of the development of drugs specific for impeding Ah production.
AHLBRECHT H.; VON DAACKE A., SYNTHESIS,(1987) N 1, 24-28
作者:AHLBRECHT H.、 VON DAACKE A.
DOI:——
日期:——
Aromatic Quinolinecarboxamides as Selective, Orally Active Antibody Production Inhibitors for Prevention of Acute Xenograft Rejection
作者:Christos Papageorgiou、Anette von Matt、Joanne Joergensen、Elsebeth Andersen、Katrin Wagner、Christian Beerli、Thai Than、Xaver Borer、Andrea Florineth、Gretty Rihs、Max H. Schreier、Gisbert Weckbecker、Christoph Heusser
DOI:10.1021/jm010822m
日期:2001.6.1
The prevention of xenograft rejection is substantially dependent on inhibiting antibodies (Ab) produced by B-cells independently of T-cell signals (TI-1). Due to their ubiquitous biochemical mechanisms of action, the immunosuppressants currently employed not only fail to discriminate between B- and T-cells but also have a narrow therapeutic window and, thus, their prolonged use in complex immunosuppressive regimens is problematic. By capitalizing on the target enzyme-bound (DHODH) structure Ib of one of these compounds, leflunomide, and modulating part of its multiple mechanisms of action to gain selectivity, the quinoline-8-carboxamide 3 was designed as a potentially weak enzyme inhibitor but effective immunosuppressant. Compound 3 fulfilled the mechanistic criteria set and had 10-fold B-cell over T-cell selectivity. Its pyridyl analogue 4 was found to be a highly potent and selective B-cell immunosuppressant with a 75-fold selectivity for B- over T-cells las judged by the MLR data) and no general cytotoxicity at concentrations up to 160-fold higher than those required to inhibit B-cells. In the mouse, 4 effectively blocked TI-1 Ab production and suppressed Ab-mediated xenograft rejection in a xenotransplantation model under a once-daily dosing regimen, with efficacy down to 0.3 mg/kg/day po. These are the first data demonstrating the feasibility of the development of drugs specific for impeding Ah production.
2-(Trifluoromethyl)quinolines from anilines: A novel mode of isomerization and cyclization
作者:Holger Keller、Manfred Schlosser
DOI:10.1016/0040-4020(96)00168-8
日期:1996.3
in the presence of phosphoryl trichloride, the resulting 4-anilino-1,1,1-trifluorobut-3-en-2-ones undergo an N → ortho shift of the side chain followed by cyclization and dehydration to afford 2-(trifluoromethyl)quinolines.