| Advances in Proximity Ligation in situ Hybridization (PLISH)
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Author:
Date:
2020-11-05
[Abstract] Understanding tissues in the context of development, maintenance and disease requires determining the molecular profiles of individual cells within their native in vivo spatial context. We developed a Proximity Ligation in situ Hybridization technology (PLISH) that enables quantitative measurement of single cell gene expression in intact tissues, which we have now updated. By recording spatial information for every profiled cell, PLISH enables retrospective mapping of distinct cell classes and inference of their in vivo interactions. PLISH has high sensitivity, specificity and signal to noise ratio. It is also rapid, scalable, and does not require expertise in molecular biology so it can be easily adopted by basic and clinical researchers.
[摘要] [摘要]在发育,维持和疾病的背景下了解组织需要确定单个细胞在其天然体内空间范围内的分子谱。我们开发了一种邻近连接原位杂交技术(PLISH),该技术能够定量测量完整组织中单细胞基因的表达,现已更新。通过记录每个分析细胞的空间信息,PLISH可以回顾性绘制不同细胞类别并推断其体内 互动。PLISH具有很高的灵敏度,特异性和信噪比。它也快速,可扩展,并且不需要分子生物学方面的专门知识,因此基础和临床研究人员可以轻松地采用它。
[背景技术]我们最近开发了一种复用原位称为PLISH(邻位连接杂交技术原位杂交)(Nagendran等人,2018)。PLISH与其他现有的空间转录组学技术不同,因为它结合了高性能,快速多路复用,低成本和技术简单性(Wilbrey -Clark等人,2020年)。可以通过自动计算完整的冷冻或石蜡包埋组织中单细胞表达图谱来分析PLISH结果,它与同时进行的免疫染色兼容。
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| In vitro Induction and Detection of Acrosomal Exocytosis in Human Spermatozoa
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Author:
Date:
2020-07-20
[Abstract] The acrosome reaction is a highly regulated exocytotic event that primes spermatozoa for successful fertilization. Upon induction, acrosomal exocytosis proceeds via a wave of vesiculation that radiates across the sperm head, destabilizing the acrosomal vesicle and resulting in the release of the acrosomal contents. Having shed their acrosome, spermatozoa are then capable of penetrating the outer vestments of the oocyte and initiating fertilization. Accordingly, the failure of spermatozoa to complete an acrosome reaction represents a relatively common etiology in male infertility patients, and the ability to induce acrosomal exocytosis has found clinical utility in the evaluation of sperm fertilizing capacity. Here, we firstly describe protocols for driving the capacitation of human ...
[摘要] [摘要 ] 顶体反应是高度调控的胞吐事件,引发精子成功受精。诱导后,顶体胞吐作用通过一束囊泡波进行,该囊泡波辐射穿过精子头部,使顶体囊泡不稳定并导致顶体内容物释放。脱去顶体后,精子便能够穿透卵母细胞的外衣并开始受精。因此,在男性不育患者中,精子不能完成顶体反应代表了相对普遍的病因,并且诱导顶体胞吐作用的能力已在评估精子受精能力中发现了临床用途。在这里,我们首先描述驱动人类精子获能的方案 在体外使用化学成分确定的培养基以引发细胞完成顶体胞吐作用。然后,我们描述了常规用于诱导结合了生理激动剂(即甾体激素,孕酮)或药理试剂(即二价阳离子离子载体,A23187)的顶体胞吐作用的方法。最后,我们描述了组织化学和免疫荧光技术的应用,这些技术可用于研究顶体反应的完成。这样的协议对于临床和男科学研究实验室中的精子功能测试具有重要的诊断实用性。
[背景 ] 顶配体是雄性配子所特有的,是一种溶酶体样的膜细胞器,装饰在精子头部的前部区域,并由顶体内膜和外膜描绘(Hermo 等人,2010a和2010b)。如此形成的顶体囊泡封装了无数的结构和酶促组分,将其分隔为可溶或不可溶级分(Guyonnet 等,2012; Guyonnet 等,2014)。这些中的后者,称为顶体基质,用作稳定的支架,其允许在顶体反应期间受控释放受精所必需的基质相关蛋白(Guyonnet ...
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