Background And Purpose: Currently, no readily available mitigators exist for acute abdominal radiation injury. Here, we present an animal model for precise and homogenous limb-sparing abdominal irradiation (LSAIR) to study the radiation-induced gastrointestinal syndrome (RIGS).
Materials And Methods: The LSAIR technique was developed using the small animal radiation research platform (SARRP) with image guidance capabilities. We delivered LSAIR at doses between 14 and 18 Gy on 8- to 10-week-old male C57BL/6 mice. Histological analysis was performed to confirm that the observed mortality was due to acute abdominal radiation injury.
Results: A steep dose-response relationship was found for survival, with no deaths seen at doses below 16 Gy and 100% mortality at above 17 Gy. All deaths occurred between 6 and 10 days after irradiation, consistent with the onset of RIGS. This was further confirmed by histological analysis showing clear differences in the number of regenerative intestinal crypts between animals receiving sublethal (14 Gy) and 100% lethal (18 Gy) radiation.
Conclusion: The developed LSAIR technique provides uniform dose delivery with a clear dose response, consistent with acute abdominal radiation injury on histological examination. This model can provide a useful tool for researchers investigating the development of mitigators for accidental or clinical high-dose abdominal irradiation.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5298432 | PMC |
http://dx.doi.org/10.1177/1559325816685798 | DOI Listing |
Curr Oncol
January 2025
Department of Radiation Oncology, Amsterdam UMC Location University of Amsterdam, Meibergdreef, 1105 AZ Amsterdam, The Netherlands.
Normal tissue reactions vary significantly among patients receiving the same radiation treatment regimen, reflecting the multifactorial etiology of late radiation toxicity. Predicting late radiation toxicity is crucial, as it aids in the initial decision-making process regarding the treatment modalities. For patients undergoing radiotherapy, anticipating late toxicity allows for planning adjustments to optimize individualized care.
View Article and Find Full Text PDFNutrition
January 2025
Department of Clinical Nutrition, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, 14080 Mexico City, Mexico. Electronic address:
Background: The most frequent early gastrointestinal (GI) toxicity symptoms are nausea (58%), diarrhea (46.7%), and vomiting (45.5%) in patients with cervical cancer (CC).
View Article and Find Full Text PDFCancer Rep (Hoboken)
January 2025
Department of Radiation Oncology, Zhongshan Hospital, Fudan University, Shanghai, China.
Background: The optimal management strategy for Stage IV rectal cancer with potentially treatable liver metastases remains controversial, particularly regarding the role of pelvic radiotherapy (RT).
Aims: We intend to investigate the impact of pelvic RT on oncological outcomes of rectal cancer with potentially treatable liver metastasis.
Methods And Results: This retrospective study included 83 patients diagnosed with rectal cancer and synchronous liver metastases from June 2012 to January 2022.
J Clin Ultrasound
January 2025
Department of Obstetrics, Paulista School of Medicine, Federal University of São Paulo (EPM-UNIFESP), São Paulo, SP, Brazil.
Cancer in pregnancy has an incidence of approximately 1:1000, and cases of sarcoma in pregnancy are rare, with only a few described in the literature. This case report describes a 32-year-old pregnant woman who noticed an approximately 3.0 cm nodule on her left flank in the second trimester of pregnancy.
View Article and Find Full Text PDFCureus
December 2024
Department of Diagnostic Imaging and Radiotherapy, Kulliyyah of Allied Health Sciences, International Islamic University Malaysia, Kuantan Campus, Kuantan, MYS.
In abdominal X-ray examinations, radiosensitive organs such as the gonads within or near the imaging region are at risk of radiation exposure. Minimizing the dose to these organs is crucial to reducing unnecessary radiation. This study utilized optically stimulated luminescence dosimeters (OSLDs) to measure the radiation dose to the male gonads at varying kilovoltage peak (kVp) settings while keeping the milliampere-seconds (mAs) constant across different radiographic projections.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!