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. 2023 Mar 27;24(7):6303.
doi: 10.3390/ijms24076303.

Correlation of Redondovirus and Entamoeba gingivalis Detections in the Human Oral Cavity Suggests That This Amoeba Is Possibly the Redondovirus Host

Marine Makoa-Meng  1 , Rayan Semmar  1   2 , Angéline Antezack  1   2   3   4 , Gwilherm Penant  1   5 , Bernard La Scola  1   2   5 , Virginie Monnet-Corti  1   2   3   4 , Philippe Colson  1   2   5
Affiliations

Correlation of Redondovirus and Entamoeba gingivalis Detections in the Human Oral Cavity Suggests That This Amoeba Is Possibly the Redondovirus Host

Marine Makoa-Meng et al. Int J Mol Sci. .

Abstract

The virome of the human oral cavity and the relationships between viruses and diseases such as periodontitis are scarcely deciphered. Redondoviruses were reported in the human oral cavity in 2019, including in periodontitis patients. Here, we aimed at detecting redondoviruses and at searching for a potential viral host in human saliva. Non-stimulated saliva was collected between December 2020 and June 2021. These samples were tested using real-time PCR regarding the presence of redondovirus and Entamoeba gingivalis DNA. Similarity searches were performed using BLAST against eukaryotic and prokaryotic sequences from GenBank. The redondovirus DNA was detected in 46% of the 28 human saliva samples. In addition, short fragments of redondovirus genomes were detected in silico within Entamoeba sequences. Finally, Entamoeba gingivalis DNA was detected in 46% of the 28 saliva samples, with a strong correlation between redondovirus DNA and E. gingivalis DNA detections, in 93% of the cases. Regarded together, these findings and previous ones strongly support the presence of redondoviruses in the human oral cavity and their association to E. gingivalis as their likely host.

Keywords: Entamoeba; human; oral cavity; periodontitis; redondovirus.

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Conflict of interest statement

The authors have no conflicts of interest to declare relative to the present study. Funding sources had no role in the design and conduct of the study, the collection, management, analysis, and interpretation of the data, and the preparation, review, or approval of the manuscript.

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