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J Rheumatol. 1994 Nov;21(11):2071-5.

Antibodies to high mobility group proteins in systemic sclerosis.

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  • 1Department of Medicine, University of Calgary, AB, Canada.

Abstract

OBJECTIVE:

To determine the prevalence of autoantibodies to high mobility group (HMG) proteins in systemic sclerosis (SSc).

METHODS:

One hundred ninety-seven unselected sera from patients diagnosed as SSc (n = 180) or Raynaud's phenomenon (RP) (n = 17) were tested for HMG autoantibodies by ELISA and immunoblotting.

RESULTS:

Seventy-one of the 180 (39.0%) SSc sera bound to HMG proteins in an ELISA: 56 (31%) to HMG-1 and/or HMG-2; 29 (16%) to HMG-14/17. In the same assay, 7 of 17 RP sera (41%) bound to HMG proteins: 4 (23%) to HMG-1 and/or HMG-2, and 5 (29%) to HMG-14/17. The specificity of HMG binding was confirmed by immunoblotting.

CONCLUSION:

Antibodies to HMG proteins, particularly to HMG-1 and HMG-2 are found in about 1/3 of SSc Sera. Since HMG-1 and HMG-2 have a role in transcription, these observations further implicate transcriptional complexes as targets of autoantibodies in scleroderma. This is the first published report of HMG autoantibodies in scleroderma.

PMID:
7869312
[PubMed - indexed for MEDLINE]
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