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高分辨率呼吸测定法评估人类精子的线粒体功能
高分辨率呼吸测定法评估人类精子的线粒体功能
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High-Resolution Respirometry to Assess Mitochondrial Function in Human Spermatozoa

高分辨率呼吸测定法评估人类精子的线粒体功能

Full Text
2,858 Views
08:32 min
June 23, 2023

DOI: 10.3791/65493-v

Pilar Irigoyen1, Rossana Sapiro1,3, Adriana Cassina2,3

1Departamento de Histología y Embriología,Unidad Académica Histología y Embriología, 2Departamento de Bioquímica,Unidad Académica Bioquímica, 3Centro de Investigaciones Biomédicas (CEINBIO), Facultad de Medicina,Universidad de la República

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通过高分辨率呼吸测定法分析精子线粒体功能,可以测量密闭腔系统中自由移动的精子的耗氧量。该技术可用于测量人类精子的呼吸,从而提供有关精子线粒体特征和完整性的信息。

我们的工作重点是男性不育症,特别是精子线粒体。精子细胞在精子发生过程中会失去大部分细胞质体和细胞器,但它们确实保留了线粒体。除了在ATP生产中的主要作用外,线粒体还参与活性氧的产生、钙储存和细胞凋亡。

精子线粒体的作用尚不完全清楚。了解精子中的线粒体功能是启发精子能量代谢和男性不育症的关键。我们已经证明人类精子线粒体功能与精子图参数相关。

我们的小组表明,线粒体是正常和病理条件下超氧化物的主要来源。此外,我们已经能够使用高分辨率呼吸测量法确定代谢临界值,该呼吸测量法可以区分精子造影异常和正常的男性。精子造影是分析男性不育症的金标准实验室研究。

它提供了大量信息,但不能反映隔膜精子缺陷。尽管已经提出了许多研究,但目前,线粒体功能的测量尚未纳入研究。高分辨率呼吸测量法比传统的 Clark 电极具有更高的灵敏度。

通过这种实验方法,我们可以分析线粒体活性的每一步。我们确定 ATP 产量、呼吸储备能力和依从性状态。此外,它使我们能够在不影响运动和功能的情况下研究实验悬架。

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高分辨率呼吸测定 线粒体功能 人类精子 精液质量 精子分析 男性不育 精子线粒体活性 耗氧量 密室系统 精子质量 精子线粒体 完整精子 透化精子 呼吸链复合物 高分辨率氧合仪 氧浓度 耗氧率 呼吸指数

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