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Sex-specific accumulation of silver nanoparticles in rat kidneys is not ovarian hormone regulated but elimination limited
NanoImpact ( IF 4.7 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.impact.2020.100255
Ji Hyun Lee , Yong Soon Kim , Jae Hyuck Sung , Jin Kwon Kim , Jeong Suk Choi , Jung Duck Park , Elaine M. Faustman , Bruce Kelman , ll Je Yu

Abstract Preferential Ag deposition in female kidneys has been reported in subacute and subchronic oral gavage and inhalation studies of various sizes of silver nanoparticles (AgNPs). In these in vivo animal studies, female kidneys were shown to accumulate 3–4 times more silver than male kidneys. The current 28-day oral gavage study of AgNPs administered to ovariectomized female rats investigated the effect of sex-dependent hormones. Ovariectomized rats were allowed to recover for 14 days, then AgNPs (60 nm) were administered by gavage for 28 days based on 500 mg/kg body weight. After this subacute oral exposure, the rats were sacrificed and the Ag content in the kidneys was measured using an atomic absorption spectrophotometer. No statistically significant difference was noted in the Ag content in the kidneys among the AgNP administered, AgNP administered sham, and AgNP administered ovariectomized rats, although the female kidneys showed a statistically significant higher accumulation of Ag than the male kidneys. Reanalysis of the clearance of Ag accumulated in the kidneys showed 2 different phases; fast (T1/210.4 days) and slow (T1/2 61.9 days) for males, while the clearance of females showed (T1/2 20.8 days) and slow (T1/2 154 days). The higher accumulation of Ag in female kidneys is due to slower clearance of Ag in female kidneys than those of males. Therefore, the current results indicate that the preferential silver accumulation in female kidneys is not regulated by ovarian hormones, but by elimination rate differences between males and females.

中文翻译:

大鼠肾脏中银纳米颗粒的性别特异性积累不受卵巢激素调节但消除受限

摘要 在亚急性和亚慢性口服灌胃和吸入各种尺寸的银纳米粒子 (AgNPs) 研究中,已经报道了女性肾脏中的优先银沉积。在这些体内动物研究中,女性肾脏积聚的银是男性肾脏的 3-4 倍。目前对切除卵巢的雌性大鼠进行的 AgNPs 为期 28 天的口服灌胃研究调查了性别依赖性激素的影响。允许切除卵巢的大鼠恢复 14 天,然后基于 500 mg/kg 体重通过管饲法施用 AgNPs (60 nm) 28 天。在这种亚急性经口暴露后,将大鼠处死并使用原子吸收分光光度计测量肾脏中的银含量。在施用的 A​​gNP 中,肾脏中的 Ag 含量没有发现统计学显着差异,AgNP 给予假手术,AgNP 给予去卵巢大鼠,尽管雌性肾脏显示出统计学上显着高于雄性肾脏的 Ag 积累。对肾脏中积累的 Ag 清除率的重新分析显示出 2 个不同的阶段;雄性快(T1/210.4 天)慢(T1/2 61.9 天),雌性清除率显示(T1/2 20.8 天)和慢(T1/2 154 天)。女性肾脏中银的较高积累是由于女性肾脏中银的清除速度比男性慢。因此,目前的结果表明,女性肾脏中银的优先积累不受卵巢激素的调节,而是受男性和女性之间消除率差异的影响。尽管女性肾脏显示出统计学上显着高于男性肾脏的 Ag 积累。对肾脏中积累的 Ag 清除率的重新分析显示出 2 个不同的阶段;雄性快(T1/210.4 天)慢(T1/2 61.9 天),雌性清除率显示(T1/2 20.8 天)和慢(T1/2 154 天)。女性肾脏中银的较高积累是由于女性肾脏中银的清除速度比男性慢。因此,目前的结果表明,女性肾脏中银的优先积累不受卵巢激素的调节,而是受男性和女性之间消除率差异的影响。尽管女性肾脏显示出统计学上显着高于男性肾脏的 Ag 积累。对肾脏中积累的 Ag 清除率的重新分析显示出 2 个不同的阶段;雄性快(T1/210.4 天)慢(T1/2 61.9 天),雌性清除率显示(T1/2 20.8 天)和慢(T1/2 154 天)。女性肾脏中银的较高积累是由于女性肾脏中银的清除速度比男性慢。因此,目前的结果表明,女性肾脏中银的优先积累不受卵巢激素的调节,而是受男性和女性之间消除率差异的影响。而雌性的清除显示(T1/2 20.8 天)和缓慢(T1/2 154 天)。女性肾脏中银的较高积累是由于女性肾脏中银的清除速度比男性慢。因此,目前的结果表明,女性肾脏中的银优先积累不受卵巢激素的调节,而是受男性和女性之间消除率差异的影响。而雌性的清除显示(T1/2 20.8 天)和缓慢(T1/2 154 天)。女性肾脏中银的较高积累是由于女性肾脏中银的清除速度比男性慢。因此,目前的结果表明,女性肾脏中银的优先积累不受卵巢激素的调节,而是受男性和女性之间消除率差异的影响。
更新日期:2020-10-01
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