Abstract
The current study aimed to investigate the effect of periodontitis and long-term heavy metal (HM) exposure on the salivary microbiome. The patients were divided into four groups as Wu Wei control (WWC) group involved healthy individuals, Wu Wei periodontitis (WWP) patients having periodontitis, Jing Chang with metal pollution periodontally healthy individuals (JCP), and Kuang periodontitis (KP). The most abundant bacteria identified at the phylum level in the WWC group were Bacteroides, Firmicutes, and Fusobacteria. Firmicutes were observed in a significantly higher proportion in the KP group than in the WWC, WWP, and JCP. At the genus level, the WWC has major dominating bacterial genera (such as Leptotrichia, Neisseria, and Fusobacterium) which were similar to WWP and KP group. The significant difference (p < 0.05) was found in alpha diversity while in beta diversity, the significant (p = 0.005) results were found among the four groups. The correlation of oral microbiota revealed that HMs present in the soil (Cr, Ni, and Cu) are associated with the growth of Capnocytophaga, Selenomonas, Aggregatibacter, and Campylobacter. The bacterial functions in the KP group were higher in translation and nucleotide metabolism than in the WWP group. This demonstrated that long-term exposure to HMs can influence the salivary microbiota which can alter the functioning, and diversity of bacteria.
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The datasets presented in this study can be found in online repositories. The names of the repository/repositories and accession number(s) can be found below: https://www.ncbi. nlm.nih.gov/sra/PRJNA721290.
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Funding
This study was financially supported by the National Natural Science Foundation of China (31500412), National Natural Science Foundation of Gansu Province, China (20JR5RA327, 21JR1RA152), and Lanzhou science and technology plan project (2018–4-66).
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Wei Zhang: methodology, visualization, investigation, data curation, formal analysis, writing, original draft. Tao Qi: investigation, data curation, formal analysis, writing — review and editing. Lihe Yao: visualization, formal analysis. Wei Wang: visualization, formal analysis. Fanrong Yu: visualization, formal analysis. Yuqin Yan: investigation, data curation, formal analysis. El-Sayed Salama: data curation, validation, visualization, formal analysis, writing — review and editing. Shaochen Su: conceptualization, supervision, resources, data curation, validation, writing — review and editing, funding acquisition, project administration. Ming Bai: conceptualization, supervision, resources, data curation, validation, writing — review and editing.
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Zhang, W., Qi, T., Yao, L. et al. Influence of Environmental Factors on Salivary Microbiota and Their Metabolic Pathway: Next-Generation Sequencing Approach. Microb Ecol 85, 317–329 (2023). https://doi.org/10.1007/s00248-021-01951-0
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DOI: https://doi.org/10.1007/s00248-021-01951-0