Exploring the variation of oral microbiota in supragingival plaque during and after head-and-neck radiotherapy using pyrosequencing

Li Gao; Yuejian Hu; Yuxia Wang; Wenxin Jiang; Zhiyan He; Cailian Zhu; Rui Ma; Zhengwei Huang

doi:10.1016/j.archoralbio.2015.05.006

Exploring the variation of oral microbiota in supragingival plaque during and after head-and-neck radiotherapy using pyrosequencing

Arch Oral Biol. 2015 Sep;60(9):1222-30. doi: 10.1016/j.archoralbio.2015.05.006. Epub 2015 May 23.

Authors

Li Gao¹, Yuejian Hu¹, Yuxia Wang¹, Wenxin Jiang¹, Zhiyan He¹, Cailian Zhu¹, Rui Ma², Zhengwei Huang³

Affiliations

¹ Department of Endodontics, Ninth people's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, PR China.
² Department of Endodontics, Ninth people's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, PR China. Electronic address: marui1723@sina.cn.
³ Department of Endodontics, Ninth people's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, PR China. Electronic address: huangzhengwei@shsmu.edu.cn.

PMID: 26073028
DOI: 10.1016/j.archoralbio.2015.05.006

Abstract

Objective: The aim of this article was to study the variation in oral microflora of the subgingival plaque during and after radiotherapy.

Design: During and after radiotherapy, microbial samples were collected at seven time points (early stage, medium stage, and later stage of radiotherapy, and 1 month, 3 months, 6 months, and 1 year after radiotherapy) in three subjects for a total of 21 samples. Polymerase chain reaction (PCR) amplification was carried out on the 16S rDNA hypervariable V1-V3 region, and then the PCR products were determined by high-throughput pyrosequencing.

Results: The rarefaction curve indicating the richness of the microflora demonstrated that the number of operational taxonomic units (OTUs) was in decline from the early stage of radiotherapy to the time point 1 month after radiotherapy and then trended upward. The Shannon diversity index declined during radiotherapy (ranging from 4.59 to 3.73), and generally rose after radiotherapy, with the lowest value of 3.5 (1 month after radiotherapy) and highest value of 4.75 (6 months after radiotherapy). A total of 120 genera were found; five genera (Actinomyces, Veillonella, Prevotella, Streptococcus, Campylobacter) were found in all subjects across all time points.

Conclusion: The richness and diversity of oral ecology decreased with increased radiation dose, and it was gradually restored with time.

Keywords: Head-and-neck radiotherapy; Oral microbiota; Oral microecology; Pyrosequencing; Supragingival plaque.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Bacteria / classification*
Cluster Analysis
DNA, Bacterial / analysis
Dental Plaque / microbiology*
Follow-Up Studies
Head and Neck Neoplasms / diagnostic imaging
Head and Neck Neoplasms / radiotherapy*
Humans
Microbiota
Mouth / microbiology*
Polymerase Chain Reaction
Radiation Dosage
Radiotherapy Planning, Computer-Assisted
Tomography, X-Ray Computed

Substances

DNA, Bacterial