Atomic force microscopy identifies regions of distinct desmoglein 3 adhesive properties on living keratinocytes.

Atomic force microscopy identifies regions of distinct desmoglein 3 adhesive properties on living keratinocytes.
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原子力显微镜可识别活角质形成细胞上具有不同桥粒芯糖蛋白 3 粘附特性的区域

DOI:
10.1016/j.nano.2014.10.006
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发表时间:
2015
期刊:
Nanomedicine : nanotechnology, biology, and medicine
影响因子:
--
通讯作者:
Spindler V
Spindler V
中科院分区:
--
文献类型:
--
作者:
Vielmuth F;Hartlieb E;Kugelmann D;Waschke J;Spindler V

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桥粒提供强的细胞-细胞粘附,这对于组织如表皮的完整性至关重要。然而,没有什么是已知的角化细胞上的桥粒粘附分子的分布和结合特性。在这里,我们使用原子力显微镜(AFM),同时可视化的地形活的人类角质形成细胞和桥粒粘附分子桥粒芯蛋白3(DSG 3)的分布和结合特性。使用重组Dsg 3作为传感器,结合事件可在细胞表面和细胞-细胞接触区域上以扩散和簇的形式检测到。这通过去除Ca 2+和通过添加指示嗜同性Dsg 3结合的Dsg 3特异性抗体来阻断。与细胞-细胞接触区域相比,Dsg 3分子在细胞表面上的结合力较低。我们的数据首次直接证明了桥粒外的Dsg 3分子的存在,并表明Dsg 3的粘附特性取决于它们的定位。来自临床编辑在角质形成细胞的研究中使用原子力显微镜,这项研究直接证明了桥粒外的桥粒芯糖蛋白3分子的存在,并揭示了这些分子的粘附特性确实取决于它们的定位。
Desmosomes provide strong cell–cell adhesion which is crucial for the integrity of tissues such as the epidermis. However, nothing is known about the distribution and binding properties of desmosomal adhesion molecules on keratinocytes. Here we used atomic force microscopy (AFM) to simultaneously visualize the topography of living human keratinocytes and the distribution and binding properties of the desmosomal adhesion molecule desmoglein 3 (Dsg3). Using recombinant Dsg3 as sensor, binding events were detectable diffusely and in clusters on the cell surface and at areas of cell–cell contact. This was blocked by removing Ca2 +and by addition of Dsg3-specific antibodies indicating homophilic Dsg3 binding. Binding forces of Dsg3 molecules were lower on the cell surface compared to areas of cell–cell contact. Our data for the first time directly demonstrate the occurrence of Dsg3 molecules outside of desmosomes and show that Dsg3 adhesive properties differ depending on their localization.From the Clinical EditorUsing atomic force microscopy in the study of keratinocytes, this study directly demonstrates the occurrence of desmoglein 3 molecules outside of desmosomes and reveales that the adhesive properties of these molecules do differ depending on their localization.
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