Plasmid elimination and immunomodulation by 3-benzazepines in vitro.
For studying the mechanisms of biological activity on 3-benzazepines, antimicrobial effect, F'lac plasmid elimination activity (a plasmid curing effect on F'lac plasmid) and antibody-dependent cellular cytotoxicity (ADCC) test were performed. A weak antiplasmid effect was found at sub-inhibitory concentrations. A combination of [KF4] with verapamil [2] did not alter the ineffectivity, however, [KF4] could inhibit the antiplasmid effect of promethazine, as compared to the control (promethazine alone) plasmid curing effect. A competition between promethazine and [KF4] might exist in plasmid elimination effect. ADCC activity of human leukocytes was enhanced by KF1, KF2, KF3, DA and NE at 1.0 microgram/mL concentrations. The majority of 3-benzazepines [KS02, KM57, KN50, KE04, KI10, KP80] was ineffective for plasmid curing, however, inhibited the ADCC reaction, but they did not show a real dose-dependent effect.[1]References
- Plasmid elimination and immunomodulation by 3-benzazepines in vitro. Motohashi, N., Kawase, M., Saito, S., Miskolci, C., Berek, L., Molnár, J. Anticancer Res. (1999) [Pubmed]
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