Anticancer Activity of New Haloalkyl Camptothecin Esters against Human Cancer Cell Lines and Human Tumor Xenografts Grown in Nude Mice

ISSN: 1875-5992 (Online)
ISSN: 1871-5206 (Print)


Volume 16, 12 Issues, 2016


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Anti-Cancer Agents in Medicinal Chemistry

Formerly: Current Medicinal Chemistry - Anti-Cancer Agents

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Editor-in-Chief:
Michelle Prudhomme
Universite Blaise Pascal - C.N.R.S
Aubiere Cedex
France


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Anticancer Activity of New Haloalkyl Camptothecin Esters against Human Cancer Cell Lines and Human Tumor Xenografts Grown in Nude Mice



Anti-Cancer Agents in Medicinal Chemistry, 12(7): 818-828.

Author(s): Zhisong Cao, John Mendoza, Anthony Kozielski, Xing Liu, Albert DeJesus, Yang Wang, Chang-Guo Zhan, Dana Vardeman and Beppino Giovanella.

Affiliation: CHRISTUS Stehlin – 10301 Stella Link, Houston, TX 77025, USA

Abstract

All chemotherapeutic agents currently in use have a narrow window of therapeutic index of 1 to 1.2. Camptothecin ester compounds are reported to have a wider therapeutic index when being used to treat human xenografts in nude mice. As a continuous effort in searching for better chemotherapeutic agents for treating cancers, new haloalkyl camptothecin and 9-nitrocamptothecin ester derivatives 2a-b and 3a-d were prepared by respective acylation of camptothecin 1a and 9-nitrocamptothecin 1b with the corresponding acylating agents. These new derivatives were tested in vitro against 8 human cancer cell lines using 7 different concentrations ranging from 5 to 300 nM and also in vivo against various types of human tumor xenografts grown in nude mice. Most of these new compounds started showing inhibitory effects on the growth of 8 cancer cell lines at concentration of 80 nM and achieved greater than 70% inhibitions against these cell lines when the concentration increased to 300 nM. Compound 2a and 3a showed good activity against human tumor xenografts in nude mice. Compared to mother compound camptothecin, 3a was much less toxic in mice with a better therapeutic index, having the potential to be further developed as a safer treatment for cancers.

Keywords:

Anticancer activity, Camptothecin esters, Esterification, Human tumor xenografts, Nude mice, Prodrugs, Therapeutic index, Topoisomerase 1, Toxicity, cytotoxic alkaloidal compound.



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Article Details

Volume: 12
Issue Number: 7
First Page: 818
Last Page: 828
Page Count: 11
DOI: 10.2174/187152012802650219
Price: $58
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