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1997 ; 12
(2
): 176-81
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Clinical significances of antibodies to Ro/SS-A autoantigens and its subtypes in
primary Sjögren s syndrome
#MMPMID9439152
Cho CS
; Park SH
; Min JK
; Lee SH
; Kim HY
Korean J Intern Med
1997[Jun]; 12
(2
): 176-81
PMID9439152
show ga
OBJECTIVE: To evaluate the patterns of Ro autoantigen recognition in Korean
patients with primary Sjögren's syndrome (SS) and to investigate its clinical
significance in SS. METHODS: Sera from primary SS (n = 51) and systemic lupus
erythematosus (SLE) (n = 132) were tested by double immunodiffusion test and
immunoblotting for reactivity with 60 kDa and 52 kDa Ro/SS-A proteins. Clinical
manifestations were evaluated on the basis of the presence of anti-Ro/SS-A
antibodies and anti-60 kDa/52 kDa proteins. RESULTS: The prevalence of
anti-Ro/SS-A antibodies in Korean patients with primary SS was 64.7%. In
immunoblotting analysis, the incidence of anti-60 kDa without anti-52 kDa was
lower in patients with SS(3.0% vs. 11.6%, p > 0.05), whereas anti-52 kDa without
anti-60 kDa was more common in SS patients than in SLE patients(42.5% vs. 4.3%, p
< 0.001). Patients with anti-Ro/SS-A antibody were significantly associated with
the presence of vasculitis, hyperglobulinemia and rheumatoid factor in primary SS
(p < 0.05). CONCLUSION: The patterns of 52 kDa and 60 kDa Ro autoantigen
recognition were quite different in the SLE and primary SS. Anti-52 kDa without
anti-60 kDa antibody may be used as a diagnostic marker for primary SS. Although
the presence of anti-Ro/SS-A antibody was closely associated with certain
clinical features in SS, these clinical manifestations were not correlated with
the presence of antibodies against each 52 kDa and 60 kDa proteins. Extended
studies with a large population are required to determine the clinical
correlation of autoantibodies against each peptides or epitopes of Ro/SS-A
proteins.