| Flow Cytometry of CD14, VDR, Cyp27 and Cyp24 and TLR4 in U937 Cells
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Author:
Date:
2020-08-05
[Abstract] Chronic Kidney Disease (CKD) patients present a micro inflammation state due to failure renal function. The calcitriol has been described as an anti-inflammatory factor that might modulates the inflammatory response in CKD patients. However, these patients have deficiency of Calcitriol due to failure renal function. But, synthesis of this vitamin has been reported in extra renal production, as in monocytes. In this context, it has been reported that the supplementation with 25 vitamin D (calcidiol or inactive form of vitamin D) induces monocytes to downregulate inflammation, due to the intracellular 1α-hidroxilase that converts calcidiol to calcitriol in these cells. Besides some reports used RT-qPCR, Western Blot or immunofluorescence techniques to investigate the expression of ...
[摘要] [摘要] 慢性肾脏病（CKD）患者由于肾功能衰竭而出现微炎症状态。骨化三醇被认为是一种抗炎因子，可能调节CKD患者的炎症反应。然而，这些患者由于肾功能衰竭而出现骨化三醇缺乏症。但是，据报道，这种维生素的合成是在肾外产生的，比如在单核细胞中。在这种情况下，有报道称，补充25维生素D（钙二醇或不活跃形式的维生素D）可诱导单核细胞下调炎症反应，这是由于细胞内的1α-羟脯氨酸酶将钙二醇转化为骨化三醇。本研究除采用RT-qPCR、Western-Blot或免疫荧光技术研究炎症和维生素D机械生物标志物在几种疾病中的表达外，本研究还应用流式细胞术技术评价25种维生素D对CD14、Toll样受体4（TLR4）、维生素D受体（VDR）的影响，单核细胞系（U937）中的1-α羟化酶（CYP27）、24-羟化酶（CYP24）。将U937培养物与健康或CKD血清孵育，用或不加25维生素D（50 ng/ml，24 h）处理，以评估CD14、TRL4、VDR、CYP27和CYP24的表达。该方案显示了研究25维生素D处理对细胞内和细胞膜生物标志物表达的影响的优势。此外，与RT-qPCR、westernblot或免疫荧光法相比，该技术不费力，但易于操作和解释。
[背景] ...
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| Using xCELLigence RTCA Instrument to Measure Cell Adhesion
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Author:
Date:
2017-12-20
[Abstract] Cell adhesion to neighbouring cells and to the underlying extracellular matrix (ECM) is a fundamental requirement for the existence of multicellular organisms. As such, the formation, stability and dissociation of cell adhesions are subject to tight control in space and time and perturbations within the sophisticated adhesion machinery are associated with a variety of human pathologies. Here, we outline a simple protocol to monitor alterations in cell adhesion to the ECM, for example, following genetic manipulations or overexpression of a protein of interest or in response to drug treatment, using the xCELLigence real-time cell analysis (RTCA) system.
[摘要] 细胞与相邻细胞和基础细胞外基质（ECM）的粘附是多细胞生物存在的基本要求。 因此，细胞粘附的形成，稳定和解离在时间和空间上受到严格的控制，复杂的粘附机制内的干扰与各种人类病理有关。 在这里，我们概述了一个简单的协议，以监测细胞粘附到ECM的变化，例如，在遗传操作或目标蛋白的过表达或响应药物治疗后，使用xCELLigence实时细胞分析（RTCA）系统。
【背景】负责细胞粘附到下面的ECM的主要分子是称为整联蛋白的跨膜异二聚体受体家族。整合素的激活和与ECM的结合触发向整合素胞质尾部募集大量信号传导，支架和细胞骨架蛋白。总之，这些粘附成分代表了负责调节许多重要细胞过程（包括细胞增殖，存活，迁移和分化）的复杂且高度动态的机制。与维持正常生理功能的重要角色一致，整合素介导的粘附和信号传导失调是许多人类疾病（包括出血性疾病，心血管疾病和癌症）发病的先导（Giancotti and Ruoslahti，1999;Bökeland Brown，2002; Huveneers and Danen，2009; Legate等人，2009; Bouvard等人，2013; Calderwood等人，2013; Horton等人，等，2015; Seguin等，，2015）。因此，整合素依赖性细胞 - 细胞外基质粘附的研究是一个研究热点，也是许多生物学领域广泛关注的课题。 ...
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| Detection of Anaphase Bridge Formation by Immunofluorescence Microscopy in Mammalian Cells
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Author:
Date:
2016-10-20
[Abstract] The aim of this protocol is to provide a comprehensive description of the materials, equipment and reproducible methods to detect and analyze anaphase bridges in immunofluorescence microscopy using DAPI to detect cells that failed to completely segregate during mitosis. It describes the process of cell preparation, staining and microscopic settings for detection of anaphase bridges. The protocol has been adapted from our previous publication (Aschacher et al., 2016).
[摘要] The aim of this protocol is to provide a comprehensive description of the materials, equipment and reproducible methods to detect and analyze anaphase bridges in immunofluorescence microscopy using DAPI to detect cells that failed to completely segregate during mitosis. It describes the process of cell preparation, staining and microscopic settings for detection of anaphase bridges. The protocol has been adapted from our previous publication (Aschacher et al., 2016).
[Background] During cell division it is vital for the maintenance of genome integrity that the genetic material is ...
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