Abstract
The National Cancer Institute uses the hollow fiber assay as part of its screening program for anticancer drug discovery. Angiogenesis to hollow fibers implanted s.c. has not been reported, thereby raising concerns about the efficiency of drug delivery and its subsequent effects on chemosensitivity. By extending postimplantation times beyond the 6-day period presently used, extensive vascular networks develop, resulting in both increased delivery and chemosensitivity to doxorubicin. This study suggests that present protocols used to evaluate compounds may produce false negative results, and additional studies to determine the predictive value of the assay are required.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adenocarcinoma / blood supply*
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Adenocarcinoma / drug therapy*
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Adenocarcinoma / pathology
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Animals
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Antibiotics, Antineoplastic / pharmacokinetics
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Antibiotics, Antineoplastic / pharmacology
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Antineoplastic Agents / pharmacokinetics
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Antineoplastic Agents / pharmacology
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Colonic Neoplasms / blood supply*
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Colonic Neoplasms / drug therapy*
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Colonic Neoplasms / pathology
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Disease Models, Animal
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Doxorubicin / pharmacokinetics
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Doxorubicin / pharmacology
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Drug Screening Assays, Antitumor / methods*
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Injections, Subcutaneous
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Mice
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Mice, Nude
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Neoplasm Transplantation
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Neovascularization, Pathologic / metabolism*
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Neovascularization, Pathologic / pathology
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Tumor Cells, Cultured
Substances
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Antibiotics, Antineoplastic
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Antineoplastic Agents
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Doxorubicin