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[Dynamics of early postradiation changes in capillary endothelium (quantitative electron microscopic analysis]
Radiobiologiia
|March 1, 1983
Summary
X-irradiation causes cell damage in rats, including plasmolemma and mitochondrial issues. These radiation effects peak within hours, impacting endothelial cells and lipid accumulation.
Area of Science:
- Radiation biology
- Cellular pathology
- Toxicology
Context:
- Investigating cellular damage mechanisms following radiation exposure.
- Understanding the time course and extent of radiation-induced cellular alterations.
Purpose:
- To characterize the ultrastructural changes in rat tissues after total-body X-irradiation.
- To quantify the cellular and subcellular responses to a 4.5 Gy dose of X-rays.
Summary:
- Total-body X-irradiation (4.5 Gy) induced oedema, plasmolemma damage, and mitochondrial alterations in rats within 1-48 hours.
- Peak cellular damage, characterized by endothelial gaps and lipid accumulation, occurred 2-6 hours post-irradiation.
- Mitochondrial size and number changes led to an increased relative volume, most evident at 12 hours.
Impact:
- Provides insights into the cellular mechanisms of radiation injury.
- Contributes to understanding the pathological consequences of ionizing radiation.
- Informs potential therapeutic strategies for radiation protection or mitigation.