ABSTRACT
Objective To evaluate the diagnostic value of different detecting technologies in antinuclear an-tibody(ANA)in autoimmune diseases(AID).Methods A total of 52 cases of patients with systemic lupus er-ythematosus(SLE),97cases of patients with AID but without SLE,92 cases of patients without immune disea-ses were collected in this study.ANA was detected by enzyme-linked immunosorbent assay(ELISA),indirect immunofluorescence(IIFA)method and linear western blot method(LIA).Results Average coincidence rate between ELISA and IIFA method to detect the ANA was 78.8% in the three groups of participants.The re-sult of ANA detected by ELISA method was positively correlated with that of IIFA method(r=0.598,P<0.05).They found that patients with AID and without AID groups both existed the phenomenon of IIFA ANA+LIA ANA -,their fluorescence titers were given priority to with 1:100.Their fluorescence modes were given priority to with granularity in both AID group(67.44%)and without AID group(54.69%),there was no difference between the two groups(P>0.05),but they were significantly higher than that of other flu-orescence modes.At the same time,the study found that patients with IIFA ANA -LIA ANA+were mostly AID patients(73.3%),the ratio was higher than without AID group,among these patients,AID patients were with SSA/Ro60,SSA/Ro52,SSB/La as the main positive autoantibodies,rather than without AID patients with anti-Sm,SSA/Ro52,SSB/La,CenpB as the main positive antibodies.Conclusion It should pay attention to multi-index joint and multi-tests detection when we diagnose autoimmune diseases.
ABSTRACT
Objective:Analysis the relationship between antiribosomal antibodies with molecular weight 38 kD and/or 15/16.5 kD protein and SLE,then to discuss the positive standard of anti ribosomal antibodies and its prevalent rate in SLE patients.Methods:262 sera from 115 SLE, 57 RA,20 SSc,39 MCTD and 31 other immune diseases were detected anti ENA antibodies by Western blot method.Results:Respectively, use 38 kD and 15/16.5 kD protein bands appear simultaneously and 38 kD protein bands appear as anti ribosomal antibodies’ positive standard, the sensitivity and specificity of anti ribosomal antibodies to SLE were 17.4%,97.3% and 28.7%,96.6% respectively.The sensitivity had significant difference (P0 05).SLE patients were dramatically dominated in 14 anti ribosomal 38 kD antibody positive patients(71.4% vs. 28.6%,P0 05).Conclusion:Anti ribosomal 38 kD antibody was closely associated with SLE but not with anti Sm antibody. Use 38 kD protein as the primary standard to verdict anti ribosomal antibody,not only can improve the positive rate of anti ribosomal antibody, but also do not depress its diagnostic specificity for SLE.So it’s worthy to spread this method. [