在几内亚猪的发育过程中对卡纳米的耳毒性进行电生理学研究
Alain Uziel1, Raymond Romand2, Michel Marot1
1Laboratoire d'Explorations Neuro-Sensorielles, Clinique O.R.L., Hôpital Saint-Charles, 34059 Montpellier, France.
Hearing research
|February 25, 2026
概括
怀孕期间暴露于卡纳米辛抗生素可能会损害几内亚猪发育中的听觉功能. 最大的听力风险发生在孕期最后15天暴露时.
科学领域:
- 抗生素对耳部有毒的作用
- 发育听力学 发育听力学
- 神经科学是一个神经科学.
背景情况:
- 抗生素对于治疗感染至关重要,但可能会产生不良影响.
- 卡纳米辛是一种氨基糖化物抗生素,因其潜在的耳毒性而闻名.
- 了解发育性耳毒性对于怀孕期间安全使用药物至关重要.
研究的目的:
- 在几内亚猪的胎儿发育过程中调查kanamycin的耳毒性.
- 为了确定在不同妊娠阶段暴露于卡纳米辛对听觉功能的影响.
- 为了将暴露时间与电生理学变化的严重程度相关联.
主要方法:
- 在怀孕的几内亚猪,在怀孕的各个阶段给予卡纳米辛.
- 新生猪接受了电生理学测试.
- 从圆窗中记录了耳麦克风电位和复合作用电位.
- 分析了对不同频率的声音爆发和过点击的反应.
主要成果:
- 在80只新生的试验猪中,有31只表现出甲胺诱导的耳毒性迹象.
- 观察到的电生理学变化与在成年哺乳动物中观察到的变化一致.
- 耳毒性最明显的是在怀孕的最后15天内暴露于卡纳米辛时.
- 晚期孕期暴露显著影响了耳潜能.
结论:
- 在几内亚猪的发育期内,卡纳米辛在几内亚猪的发育期表现出耳毒性.
- 与听觉系统发育相对应的卡纳米辛暴露时间是至关重要的.
- 孕期最后15天的暴露对发育听觉功能的风险最高.
相关概念视频
01:13The Cochlea
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
01:23Toxicity Testing in Animals
Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...