Drug distribution along the cochlea is strongly enhanced by low-frequency round window micro vibrations

Drug distribution along the cochlea is strongly enhanced by low-frequency round window micro vibrations
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低频圆窗微振动强烈增强药物沿耳蜗的分布

DOI:
10.1101/2021.05.05.442757
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发表时间:
2021
期刊:
--
影响因子:
--
通讯作者:
Flaherty S
Flaherty S
中科院分区:
--
文献类型:
--
作者:
Flaherty S

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耳蜗的不可接近性和复杂性为沿着整个耳蜗螺旋沿着均匀、安全和有效地递送药物和其他药剂提供了重大挑战。当药物被施用到中耳时,大的药物浓度梯度沿着耳蜗形成。这破坏了沿着整个耳蜗沿着获得治疗药物浓度窗口的主要目标。在这里,利用一个众所周知的生理效应水杨酸盐,我们证明了一个概念的证明,其中药物分布沿着整个耳蜗是通过应用圆窗膜低频微振动与探头,只有部分覆盖圆窗增强。我们提供了增强药物流入耳蜗和耳蜗顶端药物分布而不破坏耳蜗边界的证据。它进一步表明,听骨功能是不需要有效的药物分布,我们的报告。当听骨功能缺失或受阻时,可以实施本文提出的局部药物递送到耳蜗的新方法,并且可以将其并入临床批准的听觉假体中,用于患有传导性、感音神经性或混合性听力损失的患者。
The cochlea’s inaccessibility and complex nature provide significant challenges to delivering drugs and other agents uniformly, safely and efficiently, along the entire cochlear spiral. Large drug concentration gradients are formed along the cochlea when drugs are administered to the middle ear. This undermines the major goal of attaining therapeutic drug concentration windows along the whole cochlea. Here, utilizing a well-known physiological effect of salicylate, we demonstrate a proof of concept in which drug distribution along the entire cochlea is enhanced by applying round window membrane low-frequency micro vibrations with a probe that only partially covers the round window. We provide evidence of enhanced drug influx into the cochlea and cochlear apical drug distribution without breaching cochlear boundaries. It is further suggested that ossicular functionality is not required for the effective drug distribution we report. The novel method presented here of local drug delivery to the cochlea could be implemented when ossicular functionality is absent or impeded and can be incorporated in clinically approved auditory protheses for patients who suffer with conductive, sensorineural or mixed hearing loss.
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发表时间: 2014-01-28
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