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采用互补性检测方法评估 Annexin-V 磁激活细胞分选处理后的弱畸形精子症和畸形精子症样本中人类精子质量的富集情况。

The use of complimentary assays to evaluate the enrichment of human sperm quality in asthenoteratozoospermic and teratozoospermic samples processed with Annexin-V magnetic activated cell sorting.

机构信息

The Urology Research Department, McGill University Health Center, Montreal, QC, Canada.

出版信息

Andrology. 2013 Sep;1(5):698-706. doi: 10.1111/j.2047-2927.2013.00106.x. Epub 2013 Jul 11.

Abstract

Sperm chromatin integrity may affect the outcomes of assisted reproductive technology (ART). Developing a clinically reliable strategy to enrich sperm samples with high chromatin quality spermatozoa prior to sperm banking or use in ART would thus be advantageous. The objectives of this study were to: (i) assess the sperm chromatin quality in men with different categories of semen parameters; and (ii) evaluate the extents of Annexin-V magnetic-activated cell sorting (MACS) technology coupled with differential density gradient centrifugation (DGC) in improving sperm chromatin quality. Three categories of men from couples attending a university-based fertility clinic were recruited based on their semen parameters: normozoospermic (n = 13), asthenoteratozoospermic (n = 17) and teratozoospermic (n = 12). For each patient, spermatozoa in semen samples were processed first by DGC to enrich the motility and further by MACS to remove spermatozoa showing apoptotic features. The yield and enrichment of sperm quality was evaluated at each step with conventional semen parameters in conjunction with a combination of five complementary assays, to assess sperm maturity, chromatin structure, compaction and DNA integrity (Hyaluronic Binding Assay, SCSA, chromomycine A3 staining and TUNEL and COMET assays). Our results demonstrated that, compared with normozoospermic samples, raw asthenoteratozoospermic and teratozoospermic samples had a higher proportion of spermatozoa containing DNA breaks, but only asthenoteratozoospermic exhibited altered chromatin structure and decreased binding to hyaluronic acid. Interestingly, the DGC appeared to select for more mature spermatozoa with high DNA compaction. More importantly, in all categories of semen samples, Annexin-V MACS allows enrichment of spermatozoa with good chromatin quality as measured by the TUNEL and SCSA. Because effective treatment modalities to improve sperm DNA damage are limited, our results suggest a potential clinical value of MACS as a mean to enhance sperm quality that may improve assisted reproductive outcomes.

摘要

精子染色质完整性可能会影响辅助生殖技术(ART)的结果。因此,在精子库储存或用于 ART 之前,开发一种临床可靠的策略来富集具有高染色质质量精子的精子样本将是有利的。本研究的目的是:(i)评估具有不同精液参数类别的男性的精子染色质质量;(ii)评估 Annexin-V 磁激活细胞分选(MACS)技术与差示密度梯度离心(DGC)相结合在改善精子染色质质量方面的程度。根据精液参数,从参加大学生育诊所的夫妇中招募了三类男性:正常精子症(n=13)、弱精子症(n=17)和畸形精子症(n=12)。对于每个患者,首先通过 DGC 处理精液样本中的精子以富集活力,然后通过 MACS 去除显示凋亡特征的精子。在每个步骤中,都使用常规精液参数以及五项互补检测的组合来评估精子质量的产量和富集,以评估精子成熟度、染色质结构、致密性和 DNA 完整性(透明质酸结合试验、SCSA、吖啶橙 A3 染色和 TUNEL 和 COMET 试验)。我们的结果表明,与正常精子症样本相比,原始弱精子症和畸形精子症样本中的精子含有 DNA 断裂的比例更高,但只有弱精子症表现出染色质结构改变和与透明质酸的结合减少。有趣的是,DGC 似乎选择了具有高 DNA 致密性的更成熟的精子。更重要的是,在所有精液样本类别中,Annexin-V MACS 可富集染色质质量良好的精子,这可以通过 TUNEL 和 SCSA 来衡量。由于改善精子 DNA 损伤的有效治疗方法有限,我们的结果表明 MACS 作为一种提高精子质量的手段具有潜在的临床价值,这可能会改善辅助生殖结果。

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