PMID- 28668766 OWN - NLM STAT- MEDLINE DCOM- 20180627 LR - 20180627 IS - 1879-1506 (Electronic) IS - 0003-9969 (Linking) VI - 82 DP - 2017 Oct TI - Effect of arginine on the growth and biofilm formation of oral bacteria. PG - 256-262 LID - S0003-9969(17)30203-0 [pii] LID - 10.1016/j.archoralbio.2017.06.026 [doi] AB - BACKGROUND: Alkali production via arginine deiminase system (ADS) of oral bacteria plays a significant role in oral ecology, pH homeostasis and inhibition of dental caries. ADS activity in dental plaque varies greatly between individuals, which may profoundly affect their susceptibility to caries. OBJECTIVE: To investigate the effect of arginine on the growth and biofilm formation of oral bacteria. METHODS AND RESULTS: Polymicrobial dental biofilms derived from saliva were formed in a high-throughput active attachment biofilm model and l-arginine (Arg) was shown to reduce the colony forming units (CFU) counts of such biofilms grown for various periods or biofilms derived from saliva of subjects with different caries status. Arg hardly disturbed bacterial growth of Streptococcus mutans, Streptococcus sobrinus, Streptococcus sanguinis and Streptococcus gordonii in BHI medium, but only inhibited biofilm formation of S. mutans. Scanning electron microscope (SEM) showed S. mutans biofilms harboured fewer cells grown with Arg than that without Arg, even in the initial 2h and 8h phase. Confocal laser scanning microscope (CLSM) images of poly-microbial dental and S. mutans biofilms revealed the biofilms grown with Arg had lower exopolysaccharide (EPS)/bacteria ratios than those without Arg (P=0.004, 0.002, respectively). Arg could significantly reduce the production of water-insoluble EPS in S. mutans biofilms (P<0.001); however, quantitative real-time PCR (qRT-PCR) did not show significantly influence in gene expression of gtfB, gtfC or gtfD (P=0.32, 0.06, 0.44 respectively). CONCLUSIONS: Arg could reduce the biomass of poly-microbial dental biofilms and S. mutans biofilms, which may be due to the impact of Arg on water-insoluble EPS. Considering the contribution to pH homeostasis in dental biofilms, Arg may serve as an important agent keeping oral biofilms healthy thus prevent dental caries. CI - Copyright (c) 2017 Elsevier Ltd. All rights reserved. FAU - Huang, Xuelian AU - Huang X AD - Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Free University Amsterdam, Amsterdam, The Netherlands; State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, Sichuan, China; Division of General Dentistry, Eastman Institute for Oral Health, University of Rochester, Rochester, NY, USA. FAU - Zhang, Keke AU - Zhang K AD - State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, Sichuan, China; School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang, China. FAU - Deng, Meng AU - Deng M AD - State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, Sichuan, China; Oral Biology Program, School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. FAU - Exterkate, Robertus A M AU - Exterkate RAM AD - Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Free University Amsterdam, Amsterdam, The Netherlands. FAU - Liu, Chengcheng AU - Liu C AD - State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, Sichuan, China. FAU - Zhou, Xuedong AU - Zhou X AD - State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, Sichuan, China. FAU - Cheng, Lei AU - Cheng L AD - State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, Sichuan, China. FAU - Ten Cate, Jacob M AU - Ten Cate JM AD - Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Free University Amsterdam, Amsterdam, The Netherlands. Electronic address: j.t.cate@acta.nl. LA - eng PT - Journal Article DEP - 20170624 PL - England TA - Arch Oral Biol JT - Archives of oral biology JID - 0116711 RN - 94ZLA3W45F (Arginine) SB - IM MH - Arginine/*pharmacology MH - Biofilms/*drug effects/*growth & development MH - Dental Caries/microbiology MH - Humans MH - In Vitro Techniques MH - Microscopy, Confocal MH - Microscopy, Electron, Scanning MH - Real-Time Polymerase Chain Reaction MH - Saliva/*microbiology MH - Stem Cells MH - Streptococcus gordonii/drug effects MH - Streptococcus mutans/*drug effects MH - Streptococcus sanguis/drug effects MH - Streptococcus sobrinus/drug effects OTO - NOTNLM OT - Alkali OT - Biofilms OT - Dental caries OT - Exopolysaccharide OT - Microbial viability OT - Streptococcus OT - gtf EDAT- 2017/07/03 06:00 MHDA- 2018/06/28 06:00 CRDT- 2017/07/03 06:00 PHST- 2017/04/26 00:00 [received] PHST- 2017/06/19 00:00 [revised] PHST- 2017/06/20 00:00 [accepted] PHST- 2017/07/03 06:00 [pubmed] PHST- 2018/06/28 06:00 [medline] PHST- 2017/07/03 06:00 [entrez] AID - S0003-9969(17)30203-0 [pii] AID - 10.1016/j.archoralbio.2017.06.026 [doi] PST - ppublish SO - Arch Oral Biol. 2017 Oct;82:256-262. doi: 10.1016/j.archoralbio.2017.06.026. Epub 2017 Jun 24.