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AGING CELL:激素替代疗法减轻听力损失

2019-03-10 海北 MedSci原创

雌二醇(E)是一种多任务激素,在生殖系统中起着重要作用,并且有助于整个身体的生理和生长机制。

雌二醇(E)是一种多任务激素,在生殖系统中起着重要作用,并且有助于整个身体的生理和生长机制。

Frisina及其同事之前已经证明了这种激素的有益作用,E治疗的受试者相对于对照受试者维持低听觉脑干反应(ABR)阈值。

在最近的一项研究中,研究人员通过电生理学和分子技术评估了长期激素替代疗法(HRT)期间和之后CBA / CaJ中年雌鼠的外周和中枢听觉系统的功能。

令人惊讶的是,关于HRT在听觉系统停止后的副作用的调查很少。

研究人员的结果表明,HRT的长期影响是ABR阈值和ABR噪声间隙(GIN)幅度水平的永久性影响。与其他激素治疗受试者组相比,E治疗的动物具有更低的阈值和更高的振幅值。

有趣的是,黄体酮(P)处理的动物的ABR阈值增加,但幅度水平在整个治疗期间保持相对相同。这些结果与qPCR实验一致,与组合治疗(E + P)动物相比,在E和P动物组的血管纹(SV)中显示出高水平的IGF-1R。 IGF-1R在通过PI3K / AKT途径介导抗细胞凋亡反应中起重要作用。

总体而言,该研究结果深入了解了E激素治疗的神经保护特性,并扩大了科学知识基础,以帮助女性决定HRT是否是她们的正确选择。


原始出处:

Tanika T. Williamson et al. Hormone replacement therapy attenuates hearing loss: Mechanisms involving estrogen and the IGF‐1 pathway. AGING CELL, 2019; doi:  https://doi.org/10.1111/acel.12939


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    2019-07-24 维他命
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    2019-03-12 ysjykql

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