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Objective To explore the diagnostic value and clinical significance of the combined detection of antinuclear antibody (ANA) and anti-nuclear antibody spectrum (ANAs) in systemic lupus erythematosus (SLE) .Methods 110 patients with SLE ,88 patients with other autoimmune diseases (AID) and 50 individuals with healthy physical examination were selected and detected se-rum ANA by using indirect immunofluorescence (IIF);the Western blot was adopted to detect the 15 items of ANAs .Results A-mong 110 cases of SLE ,the positive rates of serum ANA ,anti-ribonucleoprotein /Smith antibody (nRNP/Sm) ,anti-Smith antibody (Sm) ,anti-Sjogren′s syndrome A antibody (SSA) ,anti-Ro-52 antibody (Ro-52) ,anti-Sjogren′s syndrome B antibody (SSB) ,anti-scleroderma 70 antibody (Scl-70) ,anti-PM-Scl antibody (PM-Scl) ,anti-cytoplasmic group acyl-tRNA antibody (J0-1) ,anti-centro-mere antibodies (CENP B) ,anti-proliferative protein antibody (PCNA ) ,anti-double stranded DNA antibody (ds-DNA ) ,anti-nu-cleosome antibody (AnuA) ,anti-histone antibody (AHA) ,anti-ribosomal P protein antibody (ARPA) and anti-mitochondrial anti-body M2 subtype (AMA M2) were 98 .2% ,59 .1 % ,39 .1 % ,71 .8 % ,68 .2 % ,21 .8 % ,2 .7 % ,3 .6 % ,0 .9% ,9 .1% ,5 .5% , 44 .5% ,38 .2 % ,27 .3 % ,38 .2% and 15 .5% respectively ,the positive rate of above 16 kinds of autoantibody in the orther AID were64.8% ,14.8% ,0% ,37.5% ,42.0% ,11.4% ,9.1% ,0% ,5.7% ,9.1% ,1.1% ,2.3% ,1.1% ,1.1% ,5.7% and2.3% respec-tively ;ANA had the highest diagnostic sensitivity (98 .2% ) and low specificity (35 .2% ) for SLE ,the antibodies with higher speci-ficity in diagnosing SLE were anti-Sm antibody (100 .0% ) ,anti-ds-DNA antibody (97 .7% ) ,anti-AnuA antibody (99 .0% ) ,anti-AHA antibody (99 .0% ) ,anti-ARPA antibody (94 .3% ) and anti-PCNA antibody (98 .9% ) and the disease control group (50 .9% ) .In detecting ANA karyotype by IIF ,the maximum was nuclear particle type (43 .5% ) and the disease control group (50 .9% ) ,no statistically significant difference was found between them (P>0 .05) ,part of the ANA-negative patients have positive ANAs .Conclusion Multiple autoantibodies can be detected in the serum of the SLE patients .The combined detection of ANA and ANAs has important clinical significance for diagnosing and differentially diagnosing SLE .
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Objective To detect Helicobacter pylori (H.pylori) multiple antibodies of urease (Ure),cytotoxin associated gene A protein (CagA),vacuolating toxin A (VacA),heat shock protein 60 (Hap60) and nitroreductase ( RdxA),and disclose their relations with chronic gastritis,peptic ulcer and gastric cancer.Methods A volume (3 ml) of venous blood was taken from 300 patients of gastroduodenal disease diagnosed by endoscopy,to centrifuge and detect antibodies of Ure,CagA,VacA,Hsp60,RdxA by protein chip technique.Results The infective rates of H.pylori in chronic gastritis,peptic ulcer,and gastric cancer were 34.0％,58.0％,34.0％ ( P ＜ 0.01 ),respectively.In the H.pylori positive chronic gastritis,peptic ulcer and gastric cancer,the positive rates of CagA antibody were 54.9％,75.9％,64.7％ ( P =0.070) ; the positive rates of VacA antibody were 31.4％,22.4％,17.6％ ( P =0.412) ;and the positive rates of Hap60 antibody were 56.9％,48.3％,41.2％ ( P =0.466),respectively.The total positive rate of RdxA antibody was 4.0％ (5/126).Conclusions H.pylori infection and virulence factor CagA are closely related to peptic ulcer,while it did not show the exact correlation between VacA,Hsp60 and gastroduodenal disease.The level of RdxA antibody can not represent the level of H.pylori resistance to metronidazole.
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Objective: To study the effect of helicobacter pylori on gastric mucosal cell proliferation in gastritis. Methods: Fifty-six gastritis patients with or without Helicobacter pylori infection (Hp+ 27; Hp- 29) were selected. The expression of proliferation cell nuclear antigen (PCNA), epidermal growth factor receptor (EGFR), transforming growth factor beta receptor type Ⅰand typeⅡ(TGF?RⅠ, TGF?RⅡ) in gastric mucosa were examined by immunohistochemical method. Results: The PCNA and EGFR were significantly higher in Hp positive chronic gastritis patients than in Hp negative ones(P
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<p><b>OBJECTIVE</b>Study on the antiviral effect in vivo and in vitro of recombinant antibodies with neutralization activity to influenza virus HA antigen, IgG-IV-2 and IgG-IV-6 obtained from expression in Baculo/insert system.</p><p><b>METHODS</b>Viral titer of influenza virus in MDCK was compared before and after antibody application, and measured viral titer in mouse lung before and after antibodies applied on mucous membrane.</p><p><b>RESULTS</b>IgG-IV-2 and IgG-IV-6 could reduce the titer from 4.5 log10 TCID50 to half is by 50% at doses 0.8 microg and 0.5 microg respectively. When recombinant antibodies were used on mucous membrane, the IgG-IV-2 and IgG-IV-6 reduced the titer by half at doses 0.25 mg/kg weight and 0.1 mg/kg weight respectively. The dose was 0.08 mg/kg weight when the two antibodies were jointly used.</p><p><b>CONCLUSIONS</b>The recombinant antibodies have antiviral effect in vivo and in vitro, they can neutralize viral virulence.</p>