Abstract
Two contradictory actions have been ascribed to thalidomide relative to tumor metastasis: immunosuppression and anti-angiogenesis. The latter effect was determined with basic fibroblast growth factor in a rabbit cornea micropocket assay system. The prostate adenocarcinoma (PA-III) transplanted tumor line in Lobund-Wistar (L-W) rats produces a tumor at the subcutaneous implant site from which tumor cells metastasize uniformly only through lymphatic channels through the heart to the lungs in which secondary tumors develop. L-W rats were implanted with PA-III cells and administered, by gavage, thalidomide (50 mg/kg body wt per day) in corn oil. Control rats with PA-III cells were administered corn oil. Autopsy examinations on day 30 revealed that the thalidomide-treated rats developed more metastatic tumor foci in the lungs than in the controls.
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