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Related Experiment Videos

Enzyme histochemistry on paraffin embedded tissue sections

T Fujimori, T Mochino, M Miura

    Stain Technology
    |November 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

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    This study identifies the optimal method for preserving enzyme activity in paraffin-embedded tissues. Buffered formalin acetone with Triton X-100 and specific dehydration steps yielded the best diagnostic enzyme reactions.

    Area of Science:

    • Histopathology
    • Biochemistry
    • Tissue Processing

    Background:

    • Diagnostic enzyme reactions are crucial in histopathology for disease diagnosis.
    • Preserving enzyme activity in paraffin-embedded tissue sections presents significant technical challenges.
    • Optimizing fixation and dehydration methods is essential for reliable enzyme histochemistry.

    Purpose of the Study:

    • To compare the efficacy of different fixatives and dehydration techniques for enzyme preservation.
    • To determine the optimal processing method for obtaining diagnostic enzyme reactions in paraffin-embedded tissues.
    • To evaluate the impact of Triton X-100 concentrations during dehydration on enzyme activity.

    Main Methods:

    • Four fixatives were compared: buffered formol sucrose, Baker's formol calcium, periodate lysin paraformaldehyde, and buffered formalin acetone.

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  • Tissue samples (spleens and lymph nodes) underwent dehydration in acetone with varying Triton X-100 concentrations.
  • Enzyme activity for peroxidase, esterases, acid phosphatase was assessed using standard histochemical techniques.

    • Main Results:

    • Buffered formalin acetone combined with Holt's gum sucrose fixation provided superior results.
    • Dehydration in acetone containing 0.03% Triton X-100 significantly enhanced enzyme preservation.
    • The optimized method demonstrated excellent retention of peroxidase and esterase activities.

    Conclusions:

    • The combination of buffered formalin acetone fixation, specific gum sucrose treatment, and low-concentration Triton X-100 in acetone is optimal for enzyme histochemistry.
    • This method ensures reliable diagnostic enzyme reactions in paraffin-embedded tissues.
    • The findings provide a refined protocol for researchers and diagnosticians in histopathology.