ArticleJTCVS open2024
Intracavitary cisplatin-fibrin followed by irradiation improved tumor control compared to the single treatments in a mesothelioma rat model.
Article in JTCVS open, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: To test the safety and efficacy of combination treatment for pleural mesothelioma (PM) with intracavitary cisplatin-fibrin (cis-fib) plus hemithoracic irradiation (IR) applied after lung-sparing surgery in an orthotopic immunocompetent rat model. Methods: We randomized male F344 rats into 5 groups: cis-fib (n = 9), 10 Gy IR (n = 6), 20 Gy IR (n = 9), cis-fib+10 Gy IR (n = 6), and cis-fib+20 Gy IR (n = 9). Subpleural tumor implantation was performed on day 0 with 1 million syngeneic rat mesothelioma cells (IL45-luciferase). Tumors were resected on day 9, followed by treatment with intracavitary cis-fib or vehicle control (NaCl-fib). On day 12, computed tomography-guided local irradiation in a single high dose of the former tumor region was applied. Results: We observed only short-term side effects related to 20 Gy radiotherapy. Compared to 20 Gy, 10 Gy IR did not show an impact on tumor growth. At 3 days after treatment with 20 Gy IR (day 15 of the experiment), we detected significantly smaller tumors in the cis-fib+IR group compared to IR alone (mean tumor growth, 252% vs 539%; Conclusions: Localized treatment after tumor resection in PM aims to improve local tumor control. Irradiation applied in combination with intracavitary cis-fib in rats is safe up to a dosage of 20 Gy and shows an additive effect on tumor growth delay compared to the single treatments.
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