PMID- 29489935 OWN - NLM STAT- MEDLINE DCOM- 20180417 LR - 20220331 IS - 1678-7765 (Electronic) IS - 1678-7757 (Print) IS - 1678-7757 (Linking) VI - 26 DP - 2018 TI - Influence of Helicobacter pylori culture supernatant on the ecological balance of a dual-species oral biofilm. PG - e20170113 LID - S1678-77572018000100427 [pii] LID - 10.1590/1678-7757-2017-0113 [doi] LID - e20170113 AB - Dental caries is a chronic progressive disease occurring in the tooth hard tissue due to multiple factors, in which bacteria are the initial cause. Both Streptococcus mutans and Streptococcus sanguinis are main members of oral biofilm. Helicobacter pylori may also be detected in dental plaque, playing an important role in the development of dental caries. OBJECTIVE: The aim of this study was to investigate the effect of H. pylori culture supernatant on S. mutans and S. sanguinis dual-species biofilm and to evaluate its potential ability on affecting dental health. MATERIAL AND METHODS: The effect of H. pylori supernatant on single-species and dual-species biofilm was measured by colony forming units counting and fluorescence in situ hybridization (FISH) assay, respectively. The effect of H. pylori supernatant on S. mutans and S. sanguinis extracellular polysaccharides (EPS) production was measured by both confocal laser scanning microscopy observation and anthrone-sulfuric acid method. The effect of H. pylori supernatant on S. mutans gene expression was measured by quantitative real-time PCR (qRT-PCR) assays. RESULTS: H. pylori supernatant could inhibit both S. mutans and S. sanguinis biofilm formation and EPS production. S. sanguinis inhibition rate was significantly higher than that of S. mutans. Finally, S. mutans bacteriocin and acidogenicity related genes expression were affected by H. pylori culture supernatant. CONCLUSION: Our results showed that H. pylori could destroy the balance between S. mutans and S. sanguinis in oral biofilm, creating an advantageous environment for S. mutans, which became the dominant bacteria, promoting the formation and development of dental caries. FAU - Zhang, Wenling AU - Zhang W AD - State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China. FAU - Deng, Xiaohong AU - Deng X AD - State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China. FAU - Zhou, Xuedong AU - Zhou X AD - State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China. FAU - Hao, Yuqing AU - Hao Y AD - State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China. FAU - Li, Yuqing AU - Li Y AD - State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China. LA - eng PT - Journal Article DEP - 20180222 PL - Brazil TA - J Appl Oral Sci JT - Journal of applied oral science : revista FOB JID - 101189774 RN - 0 (Polysaccharides, Bacterial) SB - IM MH - *Biofilms MH - Colony Count, Microbial MH - Dental Caries/microbiology MH - Dental Plaque/*microbiology MH - Gene Expression MH - Helicobacter pylori/genetics/*physiology MH - In Situ Hybridization, Fluorescence MH - Microscopy, Confocal MH - Plankton/growth & development MH - Polysaccharides, Bacterial/metabolism MH - Real-Time Polymerase Chain Reaction MH - Streptococcus mutans/genetics/*physiology MH - Streptococcus sanguis/genetics/*physiology MH - Time Factors PMC - PMC5832010 EDAT- 2018/03/01 06:00 MHDA- 2018/04/18 06:00 PMCR- 2018/02/15 CRDT- 2018/03/01 06:00 PHST- 2017/03/10 00:00 [received] PHST- 2017/07/01 00:00 [accepted] PHST- 2018/03/01 06:00 [entrez] PHST- 2018/03/01 06:00 [pubmed] PHST- 2018/04/18 06:00 [medline] PHST- 2018/02/15 00:00 [pmc-release] AID - S1678-77572018000100427 [pii] AID - 10.1590/1678-7757-2017-0113 [doi] PST - ppublish SO - J Appl Oral Sci. 2018;26:e20170113. doi: 10.1590/1678-7757-2017-0113. Epub 2018 Feb 22.