Serum antibodies from patients with primary Sjögren's syndrome and systemic lupus erythematosus recognize multiple epitopes on the La(SS-B) autoantigen resembling viral protein sequences.

Abstract:

:The aim of this study was to investigate the epitope recognition pattern of La(SS-B) autoantibodies in sera from patients with Sjögren's syndrome (SS) and systemic lupus erythematosus (SLE) using overlapping synthetic decapeptides on solid phase. Eighty different decapeptides with five amino acids overlap from the human La(SS-B) autoantigen were synthesized on cellulose paper using F-moc chemistry. Tests were performed with 14 SS and six SLE sera. The results showed that the immune response to the La(SS-B) oligopeptides was restricted and unique for each individual with no particular pattern typical for each of the two diseases, apart from the fact that SLE sera gave positive reaction with fewer peptides. Regions within the N- and C-termini harboured most of the positive sequences. The authors specifically addressed the possibility of a viral aetiology for disease development or autoantibody generation. In this context the most frequently recognized linear epitopes on the La(SS-B) autoantigen showed sequence similarities with proteins from a range of ubiquitous human viruses, in particular from the herpes virus group. The La(SS-B) autoantibodies may thus be generated through molecular mimicry.

journal_name

Scand J Immunol

authors

Haaheim LR,Halse AK,Kvakestad R,Stern B,Normann O,Jonsson R

doi

10.1046/j.1365-3083.1996.d01-2.x

subject

Has Abstract

pub_date

1996-01-01 00:00:00

pages

115-21

issue

1

eissn

0300-9475

issn

1365-3083

journal_volume

43

pub_type

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