ANTIGENS OF ACTINOBACILLUS-ACTINOMYCETEMCOMITANS RECOGNIZED BY PATIENTS WITH JUVENILE PERIODONTITIS AND PERIODONTALLY NORMAL SUBJECTS

被引:80
作者
SIMS, TJ
MONCLA, BJ
DARVEAU, RP
PAGE, RC
机构
[1] UNIV WASHINGTON,HLTH SCI CTR,ORAL BIOL RES CTR,SEATTLE,WA 98195
[2] UNIV WASHINGTON,HLTH SCI CTR,DEPT PERIODONT,SEATTLE,WA 98195
[3] UNIV WASHINGTON,HLTH SCI CTR,DEPT PATHOL,SEATTLE,WA 98195
[4] ONCOGEN INC,SEATTLE,WA 98121
关键词
D O I
10.1128/IAI.59.3.913-924.1991
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Most juvenile periodonitis patients respond to infection by Actinobacillus actinomycetemcomitans by producing serum antibodies. Specific antigens inducing the humoral immune response have not been identified, nor has the role of the resulting antibodies in disease progression been determined. Adsorbed and unadsorbed sera from juvenile periodontitis patients and normal subjects were analyzed by enzyme-linked immunosorbent assay and Western blots (immunoblots), using digested and undigested bacterial sonicates and French pressure cell fractions to determine the biochemical class, cross-reactivity, and cellular location of the antigens in different A. actinomycetemcomitans serotypes. Antigens detected by using high-titer sera included the following: (i) serotype-specific nonprotein material located on the cell surface, (ii) soluble-fraction proteins showing highly variable antibody binding, (iii) cross-reactive proteins, and (iv) a protein present in soluble and cell wall fractions and immunopositive for all sera tested. In addition, one apparently nonprotein component that was enriched in the cell wall fraction was observed. Sera with high immunoglobulin G titers to one, two, three, or none of the three A. actinomycetemcomitans serotypes were observed. There was a high degree of variation from one patient to another in the humoral immune response to serotype-specific and cross-reactive antigens. As demonstrated by whole-cell adsorption experiments, the serotype-specific surface antigen accounted for approximately 72 to 90% of the total antibody-binding activity for sera with titers greater than 100-fold above background, while cross-reactive antigen accounted for < 28%. Antibody binding the whole-cell sonicate for high-titer sera was inhibited 90% by lipopolysaccharide from the same serotype, strongly suggesting that lipopolysaccharide is the immunodominant antigen class.
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收藏
页码:913 / 924
页数:12
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