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Feulgen type staining with Hoffmann's violet-SO2 under exposure to UV rays

M K Dutt

    Microscopica Acta
    |July 1, 1979
    PubMed
    Summary

    UV rays enhance Hoffmann

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    Basic dyes for the staining of DNA in mammalian tissues and absorption spectra of stained nuclei in the visible light.

    Microscopica acta·1982

    Area of Science:

    • Histology and Cytology
    • Molecular Biology
    • Biochemistry

    Background:

    • Accurate staining of mammalian cell nuclei is crucial for histological analysis.
    • Traditional DNA staining methods may lack sensitivity or require harsh conditions.
    • Hoffmann's violet-SO2 offers a potential alternative for DNA visualization.

    Purpose of the Study:

    • To investigate the effect of UV irradiation on Hoffmann's violet-SO2 staining of DNA.
    • To evaluate the efficacy of UV-enhanced Hoffmann's violet-SO2 for mammalian nuclei staining.
    • To explore the mechanism and potential classification of this staining reaction.

    Main Methods:

    • Staining of acid-hydrolysed mammalian tissue nuclei with Hoffmann's violet-SO2.
    • Exposure of stained preparations to UV rays.
    • Differentiation using n-butanol.
    • Microscopic examination and comparison of stained nuclei.

    Main Results:

    • UV exposure significantly accelerated the staining reaction.
    • UV-irradiated samples showed markedly deeper violet staining of nuclei compared to non-irradiated samples.
    • n-butanol was identified as an effective differentiating reagent.

    Conclusions:

    • UV irradiation enhances the staining intensity of Hoffmann's violet-SO2 for DNA.
    • The enhanced reaction suggests a potential Feulgen-type mechanism.
    • This method offers improved visualization of mammalian nuclei DNA.

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