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Mixed connective tissue disease syndrome.

J N Gilliam, S D Prystowsky

Archives of Dermatology

|May 1, 1977

Summary

This study identifies specific skin biopsy markers for a less aggressive form of lupus erythematosus. High antibody titers to ribonuclease-sensitive extractable nuclear antigen (ENA) and epidermal nuclear staining indicate mixed connective tissue disease.

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Expression of Ro/SS-A antigen in human skin and heart.

The Journal of investigative dermatology·1985

Area of Science:

Immunodermatology
Rheumatology
Autoimmune Diseases

Background:

Cutaneous lupus erythematosus (LE) presents with diverse dermatologic manifestations.
Identifying distinct subsets of LE is crucial for targeted treatment and prognosis.
Mixed connective tissue disease (MCTD) shares features with LE but has unique serological markers.

Purpose of the Study:

To investigate the association between specific immunofluorescence findings and clinical features in patients with LE.
To identify potential biomarkers for a less aggressive subset of LE.
To explore the link between epidermal nuclear staining and antibodies to ribonuclease-sensitive extractable nuclear antigen (ENA).

Main Methods:

Direct immunofluorescence (DIF) of normal, unexposed skin was performed on 15 patients.
Serum antibody titers to ribonuclease-sensitive extractable nuclear antigen (ENA) were measured.
Clinical dermatologic features were systematically recorded and analyzed.

Main Results:

All 15 patients exhibited a particulate ('speckled') epidermal nuclear staining pattern on DIF.
Common dermatologic features included alopecia, abnormal pigmentation, swollen hands with sclerodactyly, and chronic cutaneous LE.
High titer serum antibodies to ENA, specifically ribonucleoprotein antibodies, were associated with this epidermal staining pattern.

Conclusions:

Epidermal nuclear staining on DIF and high titer ENA antibodies serve as easily detectable markers for a specific LE subset.
This subset displays clinical and laboratory features consistent with mixed connective tissue disease.
These findings suggest a less aggressive form of LE characterized by distinct immunologic and clinical profiles.

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