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Immunofluorescence Microscopy

Immunofluorescence Microscopy

A fluorescence microscope uses fluorescent chromophores called fluorochromes, which can absorb energy from a light source and then emit this energy as visible light. Fluorochromes include naturally fluorescent substances (such as chlorophylls) and fluorescent stains that are added to the specimen to create contrast. Dyes such as Texas red and FITC are examples of fluorochromes. Other examples include the nucleic acid dyes 4’,6’-diamidino-2-phenylindole (DAPI), and acridine orange.

Total Internal Reflection Fluorescence Microscopy

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

Confocal Fluorescence Microscopy

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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Cutaneous immunofluorescence.

¹University of Oklahoma Health Sciences Center, Oklahoma City.

The Medical Clinics of North America

|September 1, 1989

Summary

This summary is machine-generated.

Direct skin immunofluorescence is valuable for diagnosing lupus erythematosus (LE) and predicting systemic lupus erythematosus (SLE) outcomes. However, its utility is limited for other connective tissue diseases and undifferentiated cases.

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Area of Science:

Dermatology
Immunopathology
Rheumatology

Background:

Direct immunofluorescence of skin is a common diagnostic tool for connective tissue diseases.
Its primary diagnostic value lies in identifying lupus erythematosus (LE).
It also serves as a prognostic indicator for systemic lupus erythematosus (SLE).

Purpose of the Study:

To evaluate the diagnostic and prognostic utility of cutaneous immunofluorescence in various connective tissue diseases.
To assess the reliability of immunofluorescence interpretation based on experience and immunopathologic principles.
To explore the potential of new antibodies targeting basement membrane zone components for diagnostic applications.

Main Methods:

Direct immunofluorescence of skin biopsies.
Interpretation of immunofluorescence findings by experienced dermatopathologists.
Evaluation of antibodies against ultrastructural components of the basement membrane zone.

Main Results:

Cutaneous immunofluorescence is highly valuable for LE diagnosis and SLE prognosis.
Its diagnostic value is limited for other connective tissue diseases.
It does not reliably predict outcomes in undifferentiated connective tissue disease.
New antibodies are under investigation for broader diagnostic applications.

Conclusions:

Direct skin immunofluorescence is an established dermatopathology technique with significant value for LE and SLE.
Reliable interpretation requires substantial experience and understanding of immunopathologic principles.
Emerging antibody targets show promise for expanding diagnostic applications in diseases affecting the epidermal basement membrane zone.