Key result
A single dose of 12.5 Gy X-rays decreased total vessel volume, vessel density, maximum branch depth, and the number of terminal points in rat kidneys by 55%, 57%, 28%, and 53%, respectively, at 90 days post-irradiation.
Why the study?
Vascular regression and rarefaction remain poorly understood, and while radiation decreases microvessel density across multiple organs, the underlying mechanism is unknown.
Does a single dose of 12.5 Gy irradiation reduce renal vascular volume and density in rats?
Population
Four groups of rats
Comparison
Single dose of 12.5 Gy X-rays vs no irradiation
Design
Animal model study
Follow-up
60 or 90 days
Authors
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May induce delayed renal vascular regression in rats; leaves open relevance to human radiotherapy.
Does a single dose of 12.5 Gy irradiation reduce renal vascular volume and density in rats?
Effect estimate: 55% decrease
Absolute Event Rate: 8.2% vs 18.27%
p-value: p=<0.05
A single 12.5 Gy dose of radiation causes significant delayed renal vascular regression, characterized by reduced vessel volume, density, and branch depth by 90 days post-exposure in a rat model.
Mostaghimi et al. (2022) studied Radiation-induced vascular regression (n=26). 12.5 Gy X-ray partial body irradiation vs. 0 Gy (non-irradiated) was evaluated on Total vessel volume at 90 days post-irradiation (x10^9 µm3) (55% decrease, p=<0.05). A single dose of 12.5 Gy X-rays decreased total vessel volume, vessel density, maximum branch depth, and the number of terminal points in rat kidneys by 55%, 57%, 28%, and 53%, respectively, at 90 days post-irradiation.
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