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A convenient culture chamber for observation and embedding of macrophage monolayers for transmission electron
Abstract:
A chamber adapted from a polypropylene test tube is described for the cultivation and processing of undisturbed monolayers of normal mouse macrophages for transmission electron microscopy (TEM). Peritoneal exudate cells are grown in the chambers on Visking dialysis membranes pretreated with Polybrene (Sigma Chemical Co.) and normal mouse serum. The cells are not further disturbed after adherence since the entire chamber, including dialysis membrane and cells, is processed for electron microscopy using standard material and protocols and the embedded dialysis membrane is readily oriented and thin-sectioned. This method is efficient for studying adherent cells since growth can be nearly confluent and cells remain firmly attached throughout the manipulations. Since a transparent membrane is used, cells can also be observed with the light microscope at all stages prior to sectioning.
Insights
This study introduces a novel polypropylene test tube chamber for culturing undisturbed mouse macrophages. This method simplifies sample preparation for transmission electron microscopy (TEM), improving cell adherence and observation.
Area of Science:
- Cell Biology
- Microscopy Techniques
- Immunology
Background:
- Studying adherent cells like macrophages requires methods that preserve cellular integrity.
- Traditional transmission electron microscopy (TEM) sample preparation can disturb cell monolayers.
- A need exists for efficient techniques to cultivate and process macrophages for ultrastructural analysis.
Purpose of the Study:
- To describe a new chamber for cultivating and processing undisturbed normal mouse macrophage monolayers.
- To facilitate the use of these prepared cells for transmission electron microscopy (TEM).
- To enable light microscopy observation of cells before TEM processing.
Main Methods:
- Adapting a polypropylene test tube into a culture chamber.
- Culturing peritoneal exudate cells on Polybrene- and serum-treated Visking dialysis membranes.
- Processing the entire chamber, including the dialysis membrane and adherent cells, for TEM.
- Utilizing standard TEM materials and protocols for embedding and thin-sectioning.
Main Results:
- The method allows for the cultivation of nearly confluent macrophage monolayers.
- Cells remain firmly attached throughout processing, minimizing disturbance.
- The embedded dialysis membrane is easily oriented and thin-sectioned for TEM.
- The transparent membrane permits light microscopy observation at all stages.
Conclusions:
- This technique provides an efficient way to prepare undisturbed macrophage monolayers for TEM.
- The method preserves cell adherence and integrity, simplifying ultrastructural studies.
- It offers a valuable tool for researchers studying macrophage biology and function.