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Investigation of human keratinocyte cell adhesion using atomic force microscopy

Fung, Carmen Kar Man and Seiffert-Sinha, Kristina and Lai, King Wai Chiu and Yang, Ruiguo and Panyard, Dan and Zhang, Jiangbo and Xi, Ning and Sinha, Animesh A. (2010) Investigation of human keratinocyte cell adhesion using atomic force microscopy. Nanomedicine: Nanotechnology, Biology and Medicine, 6 (1). 191 - 200.

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Desmosomal junctions are specialized structures critical to cellular adhesion within epithelial tissues. Disassembly of these junctions is seen consequent to the development of autoantibodies directed at specific desmosomal proteins in blistering skin diseases such as pemphigus. However, many details regarding cell junction activity under normal physiological and disease conditions remain to be elucidated. Because of their complex structure, desmosomal junctions are not well suited to existing techniques for high-resolution three-dimensional structure-function analyses. Here, atomic force microscopy (AFM) is used for detailed characterization and visualization of the cell junctions of human epithelial cells. We demonstrate the ability to image the detailed three-dimensional structure of the cell junction at high magnification. In addition, the effect of specific antibody binding to desmosomal components of the cell junction is studied in longitudinal analyses before and after antibody treatment. We show that antibodies directed against desmoglein 3 (a major component of the desmosomal structural unit, and the major target of autoantibodies in patients with pemphigus vulgaris) are associated with changes at the cell surface of the human keratinocytes and alterations within keratinocyte intercellular adhesion structures, supporting the assertion that cell structures and junctions are modified by antibody binding. The present study indicates that the molecular structure of gap junctions can be more completely analyzed and characterized by AFM, offering a new technological approach to facilitate a better understanding of disease mechanisms and potentially monitor therapeutic strategies in blistering skin diseases.

Item Type:Article
Uncontrolled Keywords:AFM; Cell contacts; Cell junctions; Desmosome; Human keratinocyte
Subjects:Biomedical Science > Nanomedicine
ID Code:8575
Deposited By:SPI
Deposited On:22 Apr 2010 11:02
Last Modified:22 Apr 2010 11:02

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