自由移动的老鼠对1.95GHz电磁场的核心温度反应的描述
Nathan Bala1,2, Rodney J Croft2,3,4, Robert L McIntosh5,6
1University of Wollongong, School of Medical, Indigenous and Health Science, and Molecular Horizons, Wollongong, NSW, Australia.
Bioelectromagnetics
|June 26, 2025
概括
暴露于射频电磁场 (RF-EMF) 的成年大鼠在4W/kg时显示出显著的核心体温 (CBT) 升高. 鼠对高达4W/kg的热负荷进行补偿,CBT在暴露后恢复到正常状态.
科学领域:
- 生物电磁学 生物电磁学
- 环境健康 环境健康
- 生理学 生理学 生理学
背景情况:
- 射频电磁场 (RF-EMF) 无处不在,引发了人们对潜在健康影响的担忧.
- 了解RF-EMF暴露的生理反应,特别是核心体温 (CBT) 变化,对于风险评估至关重要.
研究的目的:
- 为了研究受控的1.95 GHz射频电磁场暴露对Sprague Dawley大鼠核心体温 (CBT) 的影响.
- 为了确定RF-EMF暴露水平和CBT变化之间的剂量反应关系.
- 评估老鼠对RF-EMF诱导的热负荷进行温度调节和补偿的能力.
主要方法:
- 成年雄性和雌性Sprague Dawley大鼠被暴露在1.95GHz的射频电磁场中,全身平均特异吸收率 (WBA-SAR) 水平为0.1,0.4和4W/kg,在回声室中3小时.
- 持续监测核心体温,使用腹膜内植入的温度和放射测距仪.
- 暴露组与假暴露的对照组进行了比较.
主要成果:
- 在4W/kg暴露26分钟后观察到CBT (+0.49°C) 的统计学上显著的峰值增加,但在较低的SAR水平下没有.
- 在暴露的最后30分钟内,CBT显著升高至4W/kg (+0.62°C) 和0.4W/kg (+0.14°C),与假药相比.
- 暴露后20分钟,CBT仅在4W/kg组 (+0.37°C) 中保持显著升高.
结论:
- 斯普拉格·道利大鼠表现出有效的温度调节,补偿高达4W/kg的热负荷,最大CBT升高低于1°C.
- 在RF-EMF暴露期间增加的CBT在暴露后显著减少,这表明暴露后的CBT测量可能不能完全代表最大的RF-EMF诱导的热效应.
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