Journal
DRUG DELIVERY
Volume 15, Issue 1, Pages 49-56Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10717540701829192
Keywords
indolo[2,3-b]quinolines; DIMIQ; liposomes; hemolysis; cytotoxicity; hepatoma Morris 5123
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The cytotoxic and antitumor activity of DIMIQ (5,11-dimethyl-5H-indolo[2,3-b]quinoline), synthetic analog of neocryptolepine, makes this compound a potential antitumor agent. An attempt to obtain liposomal form of DIMIQ.HCI was undertaken in the present study. Standard experimental conditions were chosen and information on the physicochemical parameters of the liposome dispersion containing studied indoloquinoline agent was collected. The effective and efficient encapsulation of DIMIQ.HCI (66.6%) in conventional liposomes (FAT-MLV, DMPC:DMPG 7:3 w/w at pH 7.0), uniformity of the size of liposomal vesicles, and high stability at pH 6.5 were demonstrated. Hemolysis of sheep erythrocytes induced by free form of DIMIQ.HCI was dramatically decreased after addition of liposome-entrapped DIMIQ.HCI. Treatment of hepatoma Morris 5123 cells for 24 hr with different concentrations of both free and its liposomal formulation of DIMIQ.HCI resulted in significant changes in cell morphology accompanied by reduction of cell viability.
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