Time-course studies of implanted rabbit VX2 liver tumors to identify the appropriate time for starting hepatic arterial embolization in animal models.
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| Abstract | PURPOSE: We followed the 4-week course of implanted VX2 tumors in rabbits and compared MRI and pathological findings to determine the appropriate time for starting therapy in animal liver tumor models. MATERIALS AND METHODS: We used 18 Japanese white rabbits. The VX2 liver tumor was harvested from one tumor-bearing rabbit and implanted in the liver of the other 17 rabbits. They were then sacrificed at 1 (n = 5), 2 (n = 3), 3 (n = 4), and 4 weeks (n = 5) after implantation and MRI study. Using MRI scans and/or pathological specimens of individual rabbits, we evaluated the tumor survival ratio, the major tumor axes, intrahepatic metastases, and peritoneal dissemination. RESULTS: All tumor transplantations were successful. At 1 week, 56.25% of the implanted tumors were visualized on MRI scans. At 2 weeks or later, all transplanted rabbits were confirmed to be tumor-bearing on MRI scans. At 3 weeks after implantation, the tumor size was similar on MRI scans and in pathological specimens. There were no intra-hepatic metastases or peritoneal disseminations within 2 weeks of tumor transplantation. CONCLUSION: We suggest that in studies of implanted VX2 models addressing the treatment of solid hepatic tumors, it may be prudent to start hepatic arterial embolization at 2 weeks after implantation.
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| Authors | Akinaga Sonoda, Norihisa Nitta, Ayumi Nitta-Seko, Shinichi Ohta, Yukihiro Nagatani, Kenichi Mukaisho, Hideji Otani, Keiko Tsuchiya, Masashi Takahashi, Kiyoshi Murata |
| Journal | Oncology (Oncology) Vol. 80 Issue 1-2 Pg. 92-6 ( 2011) ISSN: 1423-0232 [Electronic] Switzerland |
| PMID | 21677452 (Publication Type: Journal Article) |
| Copyright | Copyright © 2011 S. Karger AG, Basel. |
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