Article
Taxol inhibits significantly an experimentally induced peritoneal carcinomatosis depending on the application mode
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Published: | March 20, 2006 |
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Peritoneal carcinomatosis in colorectal carcinoma is still an unsolved problem in the oncological treatment since there are no established treatment protocols available.
The aim of the study was to investigate whether i) the chemotherapeutic drug Taxol & ii) the various modes of drug application generate an impact on intraperitoneal (i.p.) tumor growth, which was experimentally induced by a transfer of tumor cells (5x1.000.000) of a colon carcinoma cell line (CC-531) into the abdominal cavity of WAG rats (weight, 250-260g). The rats were divided into 3 groups (gr.; n=6 per gr.). Taxol (170 mg/qm) was given either via the i.p. or intravenous (i.v.) route using a port-a-cath. Chemotherapy - gr.1: None; gr.2: On day (d)5,10&15; gr.3: On d15,20&25 to mimic early (gr.2) & late (gr.3) chemotherapy in the postoperative course (port-a-cath for gr. 2 & 3). On the 30th d, rats were sacrificed; tumor weight of the greater omentum & mesenteric tissue, No. of metastases, volume of ascites, & tumor-specific characteristics were determined.
Results: Tumor weight [g] (Greater omentum/Mesenteric site) - gr.1: 4.58+0.55/5.26+0.62; gr.2: 0.94+0.68*/2.57+0.18* (i.p.) versus 3.05+0.47/3.76+0.25 (i.v.); gr.3: 3.92+0.22/4.68+0.24 (i.p.) versus 4.01+0.17/4.98+0.37 (i.v.) [*, P > 0.05; t test; SPSS for Windows]. Using early i.p. administration of Taxol, a significant reduction of tumor-associated parameters such as number of nodal tumor lesions at the peritoneum, hepatic & pulmonary metastases as well as volume of ascites was achieved.
Taken together, Taxol generated a significantly inhibitory effect on the i.p. tumor growth. Direct i.p. administration of Taxol induced a distinct inhibition of peritoneal carcinomatosis compared with the i.v. mode. I.p. administration of Taxol is more effective using the early postoperative regimen.
In conclusion, Taxol appears to be a potential chemotherapeutic drug providing a significant effect in the therapeutic management of peritoneal carcinomatosis under experimental conditions.