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• W1544140289 abstract "Background and Objective Photodynamic therapy (PDT) of thoracic malignancies involving the pleural surfaces is an active area of clinical investigation. The present report aims to characterize a model for PDT of disseminated non-small cell lung carcinoma (NSCLC) grown orthotopically in nude mice, and to evaluate the effect of PDT on tumor and normal tissues. Study Design H460 human NSCLC cells were injected percutaneously into the thoracic cavity of nude mice. HPPH-PDT (1 mg/kg, 24 hours) was performed via the interstitial delivery (150 mW/cm) of 661 nm light to the thoracic cavity at fluences of 25–200 J/cm. Results H460 tumors exhibited exponential growth within the thoracic cavity consisting of diffuse, gross nodular disease within 9 days after intrathoracic injection. Tumor volume, measured by magnetic resonance imaging (MRI), was highly correlated with the aggregate tumor mass extracted from the corresponding animal. Intrathoracic PDT at fluences of ≥50 J/cm produced significant decreases in tumor burden as compared to untreated controls, however, mortality increased with rising fluence. Accordingly, 50 J/cm was selected for MRI studies to measure intra-animal PDT effects. Tumor distribution favored the ventral (vs. dorsal), caudal (vs. cranial), and right (vs. left) sides of the thoracic cavity by MRI; PDT did not change this spatial pattern despite an overall effect on tumor burden. Histopathology revealed edema and fibrin deposition within the pulmonary interstitium and alveoli of the PDT-treated thoracic cavity, as well as occasional evidence of vascular disruption. Prominent neutrophil infiltration with a concomitant decline in the lymphocyte compartment was also noted in the lung parenchyma within 24 hours after PDT. Conclusion HPPH-PDT of an orthotopic model of disseminated NSCLC is both feasible and effective using intracavitary light delivery. We establish this animal model, together with the treatment and monitoring approaches, as novel and valuable methods for the pre-clinical investigation of intrathoracic PDT of disseminated pleural malignancies. Lasers Surg. Med. 43:663–675, 2011. © 2011 Wiley-Liss, Inc." @default.
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• W1544140289 date "2011-08-23" @default.
• W1544140289 modified "2023-10-18" @default.
• W1544140289 title "Photodynamic therapy of disseminated non-small cell lung carcinoma in a murine model" @default.
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• W1544140289 doi "https://doi.org/10.1002/lsm.21102" @default.
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