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Radiation-Induced Esophagitis Is Mitigated By Soy Isoflavones, Matthew Donovan Fountain
Radiation-Induced Esophagitis Is Mitigated By Soy Isoflavones, Matthew Donovan Fountain
Wayne State University Theses
Lung cancer patients receiving radiotherapy present with acute and chronic esophagitis, resulting in pain and difficulties swallowing. These effects are due to radiation injury to the normal tissues in the esophagus. Our previous studies in pre-clinical models of lung cancer and naïve mice have shown that soy isoflavones alleviates radiation-induced toxicity to normal lung, including a decrease in pneumonitis and fibrosis. In this study, we have investigated whether radiation-induced esophagitis can be reduced by soy isoflavones. C57BL/6 mice were treated with 10 Gy or 25 Gy for thoracic irradiation and soy isoflavones given daily at 1mg/mouse up to 16 weeks. …
Soy Isoflavones Mediate Radioprotection Of Normal Lung Tissue By Modulating The Radiation-Induced Inflammatory Response, Lisa Marie Abernathy
Soy Isoflavones Mediate Radioprotection Of Normal Lung Tissue By Modulating The Radiation-Induced Inflammatory Response, Lisa Marie Abernathy
Wayne State University Dissertations
Radiation-induced lung injury (RILI) is caused by an early inflammatory process triggered by damage to lung parenchyma, epithelial cells, vascular endothelial cells and stroma. Initially, oxidative injuries after radiation induce altered expression of pro-inflammatory cytokines. Infiltrating inflammatory cells are stimulated and activated, producing additional mediators, resulting in a cytokine cascade. The expansion and perpetual activation of inflammatory cells, as well as lung parenchyma, lead to clinical pneumonitis. Activated cells produce molecular mediators and growth factors that affect the proliferation and gene expression of lung fibroblasts. This process leads to increased collagen synthesis and deposition, eventually leading to the development of …