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Surface reflection interference microscopy: a new method for visualizing cytoskeletal components by light microscopy.

M Opas, V I Kalnins

    Journal of Microscopy
    |March 1, 1984
    PubMed
    Summary
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    High-resolution microscopy reveals how different protein dyes visualize the cytoskeleton. Some dyes provide stable contrast, while others depend on wavelength, offering insights into cellular structures.

    Area of Science:

    • Cell biology
    • Microscopy techniques
    • Biophysics

    Background:

    • Surface reflection interference microscopy (SRIM) offers high-resolution imaging of cellular structures.
    • Protein dyes are crucial for visualizing the cytoskeleton in detergent-resistant cell residues.

    Purpose of the Study:

    • To compare images of the cytoskeleton obtained using different protein dyes.
    • To examine the effect of four specific dyes on cytoskeleton visualization.
    • To determine the dependence of image contrast on illumination parameters.

    Main Methods:

    • Utilized surface reflection interference microscopy (SRIM).
    • Stained detergent-resistant residues of cultured cells with four protein dyes: Acid Yellow 36, Guinea Green B, Naphtol Blue Black, and Coomassie Brilliant Blue R250.

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  • Analyzed image contrast variations with changes in illuminating numerical aperture and incident light wavelength.

    • Main Results:

    • Acid Yellow 36, Guinea Green B, and Naphtol Blue Black produced images of the entire cytoskeleton with contrast insensitive to wavelength.
    • Coomassie Brilliant Blue R250 yielded images primarily from lower cytoskeleton surfaces, with contrast sensitive to wavelength.
    • Spectral sensitivities and interference effects indicated interference modulation for the first three dyes and selective reflection for Coomassie Brilliant Blue R250.

    Conclusions:

    • Different protein dyes exhibit distinct imaging mechanisms in SRIM of the cytoskeleton.
    • Dye-specific spectral properties influence image contrast and visualization fidelity.
    • Understanding these dye-dependent optical properties is crucial for accurate cytoskeleton imaging.