Abstract | CONTEXT: OBJECTIVE: We hypothesized that a triple- drug combination including CA4P and paclitaxel would improve efficacy against ATC. Therefore, we evaluated two such combinations in vivo. SETTING: We used a nude mouse xenograft model with ARO and KAT-4 cells. INTERVENTIONS: MAIN OUTCOME MEASURES: Main outcome measures included tumor growth curves and tumor weights. RESULTS:
Tumor growth curve analysis (linear mixed models, P < 0.05) and xenograft weight analysis (Kruskal-Wallis one-way ANOVA on ranks, post hoc pairwise comparison, Dunn's test, P < 0.05) demonstrated that both triple- drug combinations were significantly better than placebo for both cell lines. Anti- bromodeoxyuridine immunostaining of xenograft sections from animals injected with bromodeoxyuridine before being killed showed that CA4P alone did not inhibit DNA synthesis, but manumycin A and paclitaxel did. CA4P decreased the depth of the viable outer rim of tumor cells on xenograft sections. Using electron microscopy, we found blebbing/budding of endothelial cells into capillary lumens and autophagy of tumor cells in CA4P-treated xenografts. CONCLUSIONS: Both triple- drug combinations demonstrated excellent antineoplastic activity against ATC. The correlative findings in xenografts were consistent with vascular disruption but not direct inhibition of cell proliferation as the primary antineoplastic mechanism contributed by CA4P. These regimens warrant further investigation in clinical trials for ATC.
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Authors | Sai-Ching J Yeung, Miaorong She, Huiling Yang, Jingxuan Pan, Lily Sun, David Chaplin |
Journal | The Journal of clinical endocrinology and metabolism
(J Clin Endocrinol Metab)
Vol. 92
Issue 8
Pg. 2902-9
(Aug 2007)
ISSN: 0021-972X [Print] United States |
PMID | 17550961
(Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antibiotics, Antineoplastic
- Antimetabolites, Antineoplastic
- Antineoplastic Agents
- Antineoplastic Agents, Phytogenic
- Polyenes
- Polyunsaturated Alkamides
- Stilbenes
- Carboplatin
- Bromodeoxyuridine
- fosbretabulin
- manumycin
- Paclitaxel
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Topics |
- Animals
- Antibiotics, Antineoplastic
(therapeutic use)
- Antimetabolites, Antineoplastic
(metabolism)
- Antineoplastic Agents
(therapeutic use)
- Antineoplastic Agents, Phytogenic
(administration & dosage)
- Antineoplastic Combined Chemotherapy Protocols
(therapeutic use)
- Bromodeoxyuridine
(metabolism)
- Carboplatin
(therapeutic use)
- Carcinoma
(drug therapy, pathology)
- Cell Line, Tumor
- Cell Shape
- Endothelial Cells
(pathology, ultrastructure)
- Humans
- Immunohistochemistry
- Mice
- Mice, Nude
- Microscopy, Electron, Transmission
- Neoplasm Transplantation
- Paclitaxel
(administration & dosage)
- Polyenes
(therapeutic use)
- Polyunsaturated Alkamides
(therapeutic use)
- Stilbenes
(administration & dosage)
- Thyroid Neoplasms
(drug therapy, pathology)
- Transplantation, Heterologous
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