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The cagE gene sequence as a diagnostic marker to identify JP2 and non-JP2 highly leukotoxic Aggregatibacter actinomycetemcomitans serotype b strains.

Abstract：

BACKGROUND AND OBJECTIVE:Aggregatibacter actinomycetemcomitans is involved in oral and systemic infections, and is associated with, eg aggressive forms of periodontitis and with endocarditis. The cagE gene encodes a ≈39 kDa putative exotoxin expressed by A. actinomycetemcomitans. The level of conservation of cagE, and its possible significance in periodontal disease, has not yet been thoroughly investigated. In the present study, the role of the cagE gene as a diagnostic marker has been investigated. MATERIAL AND METHODS:We have used conventional polymerase chain reaction (PCR), quantitative PCR and whole genome sequencing data to determine the prevalence of cagE in A. actinomycetemcomitans based on analysis of: (i) 249 isolates, collected and cultivated in a Ghanaian longitudinal cohort study; (ii) a serotype b collection of 19 strains; and (iii) the 36 A. actinomycetemcomitans genomes available in the NCBI database. RESULTS:Whereas cagE was absent in the other serotypes, our data support that this gene sequence is linked to a virulent and highly leukotoxic group of serotype b strains, including both JP2 and non-JP2 genotypes of A. actinomycetemcomitans. CONCLUSION:We propose that cagE has the potential to be used as a PCR-based gene marker for the identification of a virulent and highly leukotoxic group of serotype b strains, including both JP2 and non-JP2 genotypes. This finding might be of importance in the risk assessment of the development of periodontal attachment loss in young individuals and hence suggested to be a relevant discovery in future development of new diagnostic tools and/or treatment strategies.

journal_name

J Periodontal Res

journal_title

Journal of periodontal research

authors

Johansson A,Claesson R,Höglund Åberg C,Haubek D,Oscarsson J

doi

10.1111/jre.12462

subject

Has Abstract

pub_date

2017-10-01 00:00:00

pages

903-912

issue

5

eissn

0022-3484

issn

1600-0765

journal_volume

52

pub_type

杂志文章

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