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Inverted microscope

生物显微镜

Company: Olympus
Catalog#: CX41
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In vitro Induction and Detection of Acrosomal Exocytosis in Human Spermatozoa
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 ...

Mast Cell Dependent Airway Hyperresponsiveness (AHR)
Author:
Date:
2012-10-05
[Abstract]  Asthma is a complex phenotype that involves multiple mechanisms, including adaptive and innate immunity as well as physiological and mechanical changes in the airways. In the models of asthma induced by sensitization and aerosolized allergen exposure in the absence of adjuvant, mast cells facilitate the development of in ammation and airway hyper-responsiveness. This model is useful to analysis of function of mast cells in AHR. [摘要]  哮喘是一种复杂的表型,涉及多种机制,包括适应性和先天性免疫以及气道的生理和机械变化。 在不存在佐剂的情况下,在致敏和气雾化的过敏原暴露诱导的哮喘模型中,肥大细胞促进了炎症和气道高反应性的发展。 该模型可用于分析AHR中肥大细胞的功能。

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