PLoS One:HPN-07可防止急性声损伤引起的耳蜗内功能、细胞学和电生理变化

2017-08-30 AlexYang MedSci原创

氧化胁迫是引起结构和功能变化的一个主要原因,这些结构和功能的改变与急性声损伤(AAT)诱导的听觉病理有关。最近,有研究人员调查了HPN-07,一种硝酮基自由基阱,对暴露于105dB SPL的4kHz噪声倍频带6个小时毛丝鼠的生理和细胞学变化。研究发现,HPN-07在各种干扰生物模型中表现出了抑制氧化胁迫的作用。另外,HPN-07在急性声损伤刺激后的开始的4个小时中加速和改善了听觉/耳蜗功能的恢复,

氧化胁迫是引起结构和功能变化的一个主要原因,这些结构和功能的改变与急性声损伤(AAT)诱导的听觉病理有关。最近,有研究人员调查了HPN-07,一种硝酮基自由基阱,对暴露于105dB SPL的4kHz噪声倍频带6个小时毛丝鼠的生理和细胞学变化。

研究发现,HPN-07在各种干扰生物模型中表现出了抑制氧化胁迫的作用。另外,HPN-07在急性声损伤刺激后的开始的4个小时中加速和改善了听觉/耳蜗功能的恢复,这个结果是通过听觉脑干电反应(ABR)、畸变产物耳声发射(DPOAE)、复合动作电位(CAP)和耳蜗微音电位(CM)来进行测量的。研究还发现,耳蜗内电位(EP)与CAP和CM的诱发性电位的正常紧密联系被噪音持续性的扰乱,但是在HPN-07处理的动物中却能够恢复原状稳定的状态。组织分析表明了几种AAT之后HPN-07处理的治疗优势,包括了内耳和外毛细胞损失的减少、钙网膜传入神经纤维在螺旋板中因AAT诱导损失的减少以及螺旋韧带中纤维细胞损失的减少。最后,研究人员指出,这些发现支持了AAT后,早期HPN-07的干预可以有效的阻止氧化胁迫引起的传播性的耳毒性影响,从而保持了耳蜗自我稳定状态和功能的完整性。

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