4.4 Article

Evaluation of PCR primers to identify Porphyromonas endodontalis in apical periodontitis clinical samples

Journal

ARCHIVES OF MICROBIOLOGY
Volume 204, Issue 10, Pages -

Publisher

SPRINGER
DOI: 10.1007/s00203-022-03260-7

Keywords

Oral microbiology; Endodontic infections; Apical periodontitis; PCR; Primers; Porphyromonas endodontalis

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Funding

  1. FONDECYT [1160741, 1200098]

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This study evaluated the effectiveness of two PCR primers in identifying P. endodontalis in apical periodontitis, and only one primer set showed specificity for P. endodontalis clones both in silico and in vitro.
We aimed to evaluate whether two commonly used PCR primers are effective to identify P. endodontalis and discriminate from other prevalent black-pigmented bacteria in apical periodontitis (AP). Endodontic canal samples from patients with asymptomatic AP (n = 20) were collected and cultured in anaerobiosis. Two primer sets to detect P. endodontalis were selected from the literature and first analyzed for their specificity in silico; and then tested on clinical isolates in vitro and finally, in apical exudates ex vivo. The identity of P. endodontalis was verified by PCR and Sanger sequencing with universal primers for bacterial V3-V6 regions 16S rDNA. Only one primer set showed specificity only for P. endodontalis clones in silico and also was specific for P. endodontalis in vitro and ex vivo.

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