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Published on: November 10, 2011
Postembedding immunolabeling of thin sections of Drosophila tissues for transmission electron microscopy
Abstract:
Postembedding immunolabeling using resin sections is the recommended method for beginners carrying out electron microscopy (EM) immunolabeling. Postembedding labeling refers to labeling on sections, which is a method of gaining access to the interior of the cell without the harshness of detergent or ionic extraction as is performed with preembed labeling. Investigators already familiar with routine EM-sectioning techniques find EM immunolabeling using resin sections easiest to do, as procedures are similar to those used when performing light microscopy (LM) immunolabeling, but using a different resin. In addition, the overall preservation of structure is best in resin compared to use of cryosections or preembed labeling. The most critical component of immunoEM (iEM) is what primary antibody to use. This protocol descibes antibody labeling procedures for postembedding iEM using thin sections of Drosophila tissues.
Insights
Postembedding immunolabeling offers beginners an accessible electron microscopy (EM) method. This technique provides superior structural preservation compared to other EM immunolabeling approaches.
Area of Science:
- Cell Biology
- Microscopy Techniques
Background:
- Electron microscopy (EM) immunolabeling is crucial for visualizing cellular structures.
- Beginners often face challenges with complex EM immunolabeling protocols.
- Postembedding labeling offers a simpler alternative to preembedding methods.
Purpose of the Study:
- To describe antibody labeling procedures for postembedding immunoelectron microscopy (immunoEM).
- To provide a protocol suitable for beginners in EM immunolabeling.
- To highlight the advantages of postembedding labeling for Drosophila tissues.
Main Methods:
- Utilizing resin sections for postembedding immunolabeling.
- Adapting light microscopy (LM) immunolabeling procedures for EM.
- Focusing on antibody labeling on thin sections of Drosophila tissues.
Main Results:
- Postembedding immunolabeling using resin sections is recommended for beginners.
- This method allows cellular access without harsh chemical treatments.
- It offers better structural preservation compared to cryosections or preembedding.
Conclusions:
- Postembedding immunolabeling on resin sections is an effective and accessible EM technique.
- The protocol is particularly useful for researchers familiar with LM immunolabeling.
- Optimal primary antibody selection is critical for successful immunoEM.
