Abstract
This animal study evaluated the radioprotective effects of N-acetylcysteine (NAC) and amifostine on the biomechanical properties of bone in Wistar albino rats of both genders. The rats were randomly divided into four groups of eight: a control group (C); a group given a single dose of 40 Gy of γ-irradiation (R); a group given γ-irradiation plus 200 mg/kg amifostine (R + amifostine); and a group given γ-irradiation plus 1000 mg/kg NAC (R + NAC). Extrinsic and intrinsic properties of bone, bone mineral density (BMD) and the cross-sectional area of the femoral shaft were determined. The cross-sectional area was significantly higher in the R + NAC and R + amifostine groups compared with the R and C groups. The BMD, maximum load and stiffness were also significantly higher in the R + NAC and R + amifostine groups than in the R group, and energy absorption capacity was higher in the R + NAC group than in the R group. These findings indicate that NAC and amifostine preserve bone quality in rats exposed to γ-irradiation.
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