ArticleRadiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology2012
Effects of lipopolysaccharide on the response of C57BL/6J mice to whole thorax irradiation.
Article in Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed, 21 citations in OpenAlex.
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- Article
- Neuroinflammatory and cognitive consequences of combined radiation and immunotherapy in a novel preclinical model.Oncotarget · 2017Article
- The Influence of Radiotherapy on AIM2 Inflammasome in Radiation Pneumonitis.Inflammation · 2016Article
- A murine model of peripheral irradiation-induced fatigue.Behavioural brain research · 2016Article
- Long intergenic non-coding RNA induced by X-ray irradiation regulates DNA damage response signaling in the human bronchial epithelial BEAS-2B cell line.Oncology letters · 2015Article
- Enhanced survival from radiation pneumonitis by combined irradiation to the skin.International journal of radiation biology · 2014Article
- Targeting the Renin-angiotensin system combined with an antioxidant is highly effective in mitigating radiation-induced lung damage.International journal of radiation oncology, biology, physics · 2014Article
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Authors and funding
4 authors at 3 institutions in 1 country.
Funding
Abstract
background and purposeInflammatory and fibrogenic processes play a crucial role in the radiation-induced injury in the lung. The aim of the present study was to examine whether additive LPS exposure in the lung (to simulate respiratory infection) would affect pneumonitis or fibrosis associated with lung irradiation. MATERIAL AND
methodsWildtype C57Bl/6J (WT-C57) and TNFα, TNFR1 and TNFR2 knockout ((-/-)) mice, in C57Bl/6J background, were given whole thorax irradiation (10 Gy) with or without post-irradiation intratracheal administration of LPS (50μg/mice). Functional deficit was examined by measuring breathing rate at various times after treatment. Real-time Reverse Transcription-Polymerase Chain Reaction (RT-PCR) and immunohistochemistry were used to analyze the protein expression and m-RNA of Interleukin-1 alpha (IL-1α), Interleukin-1 beta (IL-1β), Interleukin-6 (IL-6), Tumour Necrosis Factor alpha (TNFα) and Transforming Growth Factor beta (TGFβ) in the lung at various times after treatment. Inflammatory cells were detected by Mac-3 (macrophages) and Toluidine Blue (mast cells) staining. Collagen content was estimated by hydroxyproline (total collagen) and Sircol assay (soluble collagen). Levels of oxidative damage were assessed by 8-hydroxy-2-deoxyguanosine (8-OHdG) staining.
resultsLPS exposure significantly attenuated the breathing rate increases following irradiation of WT-C57, TNFR1(-/-) and TNFR2(-/-)mice and to a lesser extent in TNFα(-/-) mice. Collagen content was significantly reduced after LPS treatment in WT-C57, TNFR1(-/-) and TNFα(-/-) mice and there was a trend in TNFR2(-/-) mice. Similarly there were lower levels of inflammatory cells and cytokines in the LPS treated mice.
conclusionsThis study reveals a mitigating effect of early exposure to LPS on injury caused by irradiation on lungs of C57Bl mice. The results suggest that immediate infection post irradiation may not impact lung response negatively in radiation-accident victims, however, further studies are required in different animal models, and with specific infectious agents, to confirm and extend our findings.
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