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Preservation of cytoskeletal elements for electron microscopy.

J H Temmink, H Spiele

    Cell Biology International Reports
    |January 1, 1978
    PubMed
    Summary

    Different cell fixation and dehydration methods were tested for preserving cytoskeletal elements. Osmic acid post-fixation did not alter microtubular and microfilamentous systems, but critical point drying failed to preserve structures.

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    Area of Science:

    • Cell Biology
    • Microscopy Techniques
    • Cytoskeletal Research

    Background:

    • Preserving cellular structures during sample preparation is crucial for microscopy.
    • Cytoskeletal elements, including microtubules and microfilaments, are delicate and prone to damage.
    • Understanding optimal fixation and dehydration protocols is essential for accurate ultrastructural analysis.

    Purpose of the Study:

    • To evaluate the impact of different fixation and dehydration procedures on cytoskeletal preservation in murine fibroblasts.
    • To determine if osmic acid post-fixation affects the organization of microtubular and microfilamentous systems.
    • To assess the efficacy of critical point drying compared to conventional dehydration methods for preserving cellular structures.

    Main Methods:

    • Murine fibroblasts were subjected to various fixation protocols, including glutaraldehyde fixation.
    • Post-fixation with osmic acid was employed in some samples.
    • Cells were dehydrated using both conventional methods and critical point drying.
    • The organization of microtubular and microfilamentous systems was analyzed.

    Main Results:

    • The organization of the microtubular and microfilamentous systems remained consistent regardless of osmic acid post-fixation after glutaraldehyde fixation.
    • Critical point drying did not preserve cellular structures that were absent in cells prepared using conventional dehydration and embedding techniques.
    • Glutaraldehyde fixation alone provided comparable results to osmic acid post-fixation for cytoskeletal organization.

    Conclusions:

    • Osmic acid post-fixation following glutaraldehyde fixation does not significantly alter the observed organization of microtubular and microfilamentous systems in murine fibroblasts.
    • Critical point drying is not superior to conventional dehydration methods for preserving fine cellular structures in this context.
    • Standard glutaraldehyde fixation and conventional dehydration appear sufficient for studying the basic organization of the microtubular and microfilamentous systems.

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