A study was made of the influence of parabiosis on the critical organ status in rats exposed to supralethal doses. The presence of a nonirradiated partner was shown to accelerate the recovery processes both in the intestine and the haemopoietic organs. The X-ray dose leading to a 50% decrease in the number of crypts was 11.9 Gy for parabionts, and 6.6 Gy for single animals.
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Background: Hypothyroidism is a common sequela after radiotherapy for nasopharyngeal carcinoma (NPC). Magnetic resonance imaging (MRI) has gained prominence in thyroid imaging, leveraging its non-ionizing radiation, high spatial resolution, multiparameter and multidirectional imaging. Few previous studies have investigated the evaluation of radiation-induced thyroid injury by MRI.
View Article and Find Full Text PDFMRI detects tubulointerstitial changes in mouse models of radiation-induced nephropathy.
Magn Reson Med
January 2025
F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, Maryland, USA.
Purpose: We hypothesized that radiation-induced tubulointerstitial changes in the kidney can be assessed using MRI-based T relaxation time measurements.
Methods: We performed MRI, histology, and serum biochemistry in two mouse models of radiation nephropathy: one involving external beam radiotherapy and the other using internal irradiation with an α-particle-emitting actinium-225 radiolabeled antibody. We compared the mean T values of different renal compartments between control and external beam radiotherapy or α-particle-emitting actinium-225 radiolabeled antibody-treated groups and between the two radiation-treated groups using a Wilcoxon rank-sum test.
Gliclazide protects ionizing radiation-induced intestinal injury in mice by inhibiting oxidative stress and caspase-3.
BioTechnologia (Pozn)
December 2024
Department of Radiopharmacy, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran.
Gliclazide (GLZ), an oral antihyperglycemic medication, has additional beneficial effects, such as anti-inflammatory and antioxidant properties, besides lowering blood glucose levels. In this study, the radio-protective effect of GLZ was evaluated against ionizing radiation (IR)-induced intestinal injury in mice. Eight groups of mice were randomized as follows: control, GLZ (5, 10, and 25 mg/kg), IR (6 Gy), and IR + GLZ (at 5, 10, and 25 mg/kg).
View Article and Find Full Text PDFPhosphoproteomic analysis of X-ray-irradiated planarians provides novel insights into the DNA damage response.
Int J Biol Macromol
January 2025
College of Life Science, Henan Normal University, Xinxiang 453007, Henan Province, PR China. Electronic address:
Phosphorylation plays a crucial role in the cellular response to radiation and cancer therapies, yet phosphoproteomics studies in planarians remain underexplored despite the organism's remarkable regenerative capacities. This study utilized advanced ion mobility mass spectrometry for 4D-label-free quantitative proteomics to identify phosphorylation sites associated with irradiation in planarians. A total of 33,284 phosphorylation sites from 15,505 phosphorylated peptides and 4710 unique phosphoproteins were identified.
View Article and Find Full Text PDFPurpose: Radiation Therapy (RT) can modulate the immune system and generate anti-tumor T cells. However, this anti-tumor-activity is countered by radiation-induced immunosuppression (RIIS). Clinical advantages of proactively sparing RT dose to immune rich organs have not previously been evaluated.
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