Abstract
This chapter deals with tissue preparation for subsequent detection of molecules in biological samples using immunocytochemistry and transmission electron microscopy. The aim of these methods is to localize specific molecules at high resolution in order to identify their subcellular (or exact extracellular) localization. The methods are based on the use of antibodies or other affinity markers that bind specifically to a molecule of interest and a suitable detection system, e.g. a secondary antibody coupled to a gold particle of 5–15 nm size. Two different ways of sample preparation are described: (1) high-pressure freezing followed by freeze-substitution and immunogold labeling and (2) chemical fixation followed by freeze-substitution and immunogold labeling. Both methods have advantages and disadvantages that influence their utility in a given study design.
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Acknowledgements
The author wishes to thank Prof. Paul Webster, House Ear Institute, USA, for his very helpful suggestions to improve this manuscript and to Ms. Karola Michael for technical assistance with the preparation of the graphical work. The author is also thankful to the whole team of the EMBO Practical course “Electron microscopy and stereology in cell biology” held in Paris, September 2004, and the Faculty of Medicine, Georg-August-University Göttingen, whose research grant supported the study on high-pressure freezing of myocardium for immunolocalization of connexin 43.
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Mühlfeld, C. (2010). High-Pressure Freezing, Chemical Fixation and Freeze-Substitution for Immuno-electron Microscopy. In: Hewitson, T., Darby, I. (eds) Histology Protocols. Methods in Molecular Biology, vol 611. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-60327-345-9_7
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DOI: https://doi.org/10.1007/978-1-60327-345-9_7
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