The effect of liposome-entrapped specific cell growth inhibitor (chalone) on tumour cell proliferation

Journal of Microencapsulation
M V BogoevaB A Botev

Abstract

The effect of specific cell growth inhibitor (chalone) on the mitotic activity of ascites ISM applied entrapped in liposomes compared to the non-entrapped 'free' form was investigated. The 'free' chalone injected intraperitoneally in BALB/c ascites ISM-bearing mice (1500 mg per kg body weight) decreased the mitotic activity of the tumour by 66 per cent 2.5 h after administration. Five hours after administration, complete restoration of the mitotic index to the control level was observed. Chalone encapsulated into Bangham liposomes (1000 mg per kg body weight) in otherwise identical conditions produced 44 per cent inhibition after 2.5 h, while at 5 h post-injection the mitotic inhibition was still present increasing up to as much as 50 per cent. No such effect was evident by chalone encapsulated in freeze-thawed liposomes (500 mg per kg body weight). The chalone under study specifically inhibits the cell division of the originating tumour cells and has no effect on its DNA synthesis or on the mitosis of the basal layer of the oesophagus and crypts of the intestinal epithelium. The results obtained provide evidence that liposome-entrapped chalone prolongs the inhibition of tumour cell mitosis in comparison to the 'free' one even ...Continue Reading

References

Apr 1, 1985·Journal of Microencapsulation·E E GabevI Vassilev
Aug 1, 1965·Journal of Molecular Biology·A D BanghamJ C Watkins
Jan 1, 1983·Virchows Archiv. B, Cell Pathology Including Molecular Pathology·O H Iversen
Aug 1, 1959·Canadian Journal of Biochemistry and Physiology·E G BLIGH, W J DYER
Oct 1, 1964·Experimental Cell Research·W S BULLOUGHE B LAURENCE

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