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. 1994 Jan;1(1):71–77. doi: 10.1128/cdli.1.1.71-77.1994

A confocal microscopy study of anticytoskeletal antibody activity in patients with connective tissue disease.

P W French 1, R Penny 1, J L Yang 1
PMCID: PMC368199  PMID: 7496926

Abstract

The significance of the presence of antibodies to cytoskeleton proteins in patients with connective tissue diseases is not clear, as there is a high level of these antibodies in healthy controls. In an attempt to improve the visualization of the immunofluorescence binding pattern of autoantibodies to cytoskeletal structures in cultured fibroblasts, we have used confocal microscopy. Of the 256 serum samples tested, 155 (61%) WERE reactive with cytoplasmic structures. These reactive samples could be divided into seven patterns of binding, as determined by double-blind examination of single-section confocal images. While confirming the results of previous immunofluorescence studies which have shown that autoantibodies that bind to filamentous structures in the cytoplasm of cultured cells are common in patients with connective tissue diseases, we were able to identify three patterns of cytoskeletal binding which may be useful as an adjunct to other tests for the diagnosis of some connective tissue diseases, in particular systemic sclerosis (scleroderma) and rheumatoid arthritis/Sjogren's syndrome. None of the seven patterns was exclusive to a particular disease. We conclude that confocal microscopy may be of limited use as an adjunct to other serological assays in the diagnosis of some forms of connective tissue disease.

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Selected References

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