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IMMUNODOMINANT ANTIGENS OF ACTINOBACILLUS-ACTINOMYCETEMCOMITANS SEROTYPES A AND C IN HIGH-RESPONDER PATIENTS

被引：25
作者：
CALIFANO, JV
SCHENKEIN, HA
TEW, JG
机构：
[1] Medical College of Virginia, Virginia Commonwealth University Clinical Research Center for Periodontal Diseases, MCV, VCU School of Dentistry, Richmond, Virginia
来源：
ORAL MICROBIOLOGY AND IMMUNOLOGY | 1991年 / 6卷 / 04期
关键词：
ACTINOBACILLUS ACTINOMYCETEMCOMITANS; SEROTYPE; PERIODONTITIS; ANTIBODY;
D O I：
10.1111/j.1399-302X.1991.tb00482.x
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
This study was undertaken to examine the characteristics of the immunodominant antigens of Actinobacillus actinomycetemcomitans serotypes a and c. The top responders for A. actinomycetemcomitans serotypes a and c were selected (19 for serotype a and 21 for serotype c) from 150 clinically characterized patients. Competition assays revealed that 9 of 19 of these patients were reacting specifically to serotype a and 12 of 21 for serotype c. Limiting dilution analysis on Western blots revealed that most antigen bands apparent at low dilution disappeared as the patient's serum was diluted. The antigen band(s) remaining at the endpoint or the dilution corresponding to the antibody titer were defined as immunodominant. For serotype a there were several different immunodominant antigens but none was present in more than half of the subjects. For serotype c the immunodominant antigens included a number of discrete bands and a diffuse smeared polysaccharide band. Only 2 of these antigens were present in the majority of the high-responders: 92% had the smeared antigen and 67% had a 15 kDa antigen. The 15 kDa band was a protein common to all A. actinomycetemcomitans serotypes. The smeared antigen was unaffected by protease K treatment and gave a reaction of identity with the serotype c specific rabbit antiserum. This rabbit antiserum is specific for a mannan carbohydrate and does not react with LPS (23). Therefore, the smeared immunodominant antigen appears to be a polysaccharide containing mannan.
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页码：228 / 235
页数：8
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