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Kumar RS, Ankola AV, Sankeshwari RM, Hampiholi V, Jalihal S, Pai Khot AJ, Santhosh VN, Ragu K. Clinical and microbial evaluation of mouthwash containing Achyranthes aspera and Trachyspermum ammi: A randomized controlled non-inferiority trial. J Oral Biol Craniofac Res 2024; 14:522-529. [PMID: 39055999 PMCID: PMC11269283 DOI: 10.1016/j.jobcr.2024.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 06/26/2024] [Accepted: 06/27/2024] [Indexed: 07/28/2024] Open
Abstract
Objectives Achyranthes aspera (Apamarga) and Trachyspermum ammi (Ajwain) have been used in many clinical conditions, and it displays valuable properties as an alternative to Chlorhexidine (CHX) in the management of gingivitis. Therefore, this study aims to assess the effect of Achyranthes aspera and Trachyspermum ammi (AA + TA) based herbal mouthwash, 0.2 % CHX, and placebo mouthwash on gingival health, plaque control and antibacterial activity against specific periodontal pathogens (Porphyromonas gingivalis and Tannerella forsythia) using quantitative real-time PCR (RT-PCR). Methods This was a randomized controlled non-inferiority trial involving 108 children with plaque-induced gingivitis who were randomly assigned to three groups of 36 children each: Group A, AA + TA mouthwash; Group B, CHX mouthwash; and Group C, placebo mouthwash. Gingival index and plaque index were recorded at baseline, 7th and 21st day. RT-PCR was employed to determine the bacterial counts of each plaque sample at baseline and after 21 days. Results All three groups exhibited a gradual and significant reduction in both gingival and plaque scores from baseline to days 7 and 21. However, the placebo group did not demonstrate a significant difference in scores between days 7 and 21. Furthermore, a significant reduction in bacterial counts of P. gingivalis and T. forsythia was observed in the groups receiving CHX and AA + TA mouthwash after 21 days of intervention compared to the placebo group. Conclusion AA + TA mouthwash demonstrated non-inferiority in anti-gingivitis and anti-plaque properties compared to CHX, suggesting its potential suitability as an alternative to CHX when used in conjunction with mechanical plaque control measures.
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Affiliation(s)
- Ram Surath Kumar
- Department of Public Health Dentistry, KLE Vishwanath Katti Institute of Dental Sciences, KLE Academy of Higher Education and Research, Belagavi, 590010, India
| | - Anil V. Ankola
- Department of Public Health Dentistry, KLE Vishwanath Katti Institute of Dental Sciences, KLE Academy of Higher Education and Research, Belagavi, 590010, India
| | - Roopali M. Sankeshwari
- Department of Public Health Dentistry, KLE Vishwanath Katti Institute of Dental Sciences, KLE Academy of Higher Education and Research, Belagavi, 590010, India
| | - Vinuta Hampiholi
- Department of Periodontics, KLE Vishwanath Katti Institute of Dental Sciences, KLE Academy of Higher Education and Research, Belagavi, 590010, India
| | - Sagar Jalihal
- Department of Public Health Dentistry, KLE Vishwanath Katti Institute of Dental Sciences, KLE Academy of Higher Education and Research, Belagavi, 590010, India
| | - Atrey J. Pai Khot
- Department of Public Health Dentistry, KLE Vishwanath Katti Institute of Dental Sciences, KLE Academy of Higher Education and Research, Belagavi, 590010, India
- Department of Public Health Dentistry, Goa Dental College and Hospital, Bambolim, Goa, India
| | - Varkey Nadakkavukaran Santhosh
- Department of Public Health Dentistry, KLE Vishwanath Katti Institute of Dental Sciences, KLE Academy of Higher Education and Research, Belagavi, 590010, India
| | - Kavitha Ragu
- Department of Public Health Dentistry, KLE Vishwanath Katti Institute of Dental Sciences, KLE Academy of Higher Education and Research, Belagavi, 590010, India
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Moran SP, Rosier BT, Henriquez FL, Burleigh MC. The effects of nitrate on the oral microbiome: a systematic review investigating prebiotic potential. J Oral Microbiol 2024; 16:2322228. [PMID: 38420038 PMCID: PMC10901185 DOI: 10.1080/20002297.2024.2322228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 02/15/2024] [Indexed: 03/02/2024] Open
Abstract
Background Nitrate (NO3-) has been suggested as a prebiotic for oral health. Evidence indicates dietary nitrate and nitrate supplements can increase the proportion of bacterial genera associated with positive oral health whilst reducing bacteria implicated in oral disease(s). In contrast, chlorhexidine-containing mouthwashes, which are commonly used to treat oral infections, promote dysbiosis of the natural microflora and may induce antimicrobial resistance. Methods A systematic review of the literature was undertaken, surrounding the effects of nitrate on the oral microbiota. Results Overall, n = 12 in vivo and in vitro studies found acute and chronic nitrate exposure increased (representatives of) health-associated Neisseria and Rothia (67% and 58% of studies, respectively) whilst reducing periodontal disease-associated Prevotella (33%). Additionally, caries-associated Veillonella and Streptococcus decreased (25% for both genera). Nitrate also altered oral microbiome metabolism, causing an increase in pH levels (n = 5), which is beneficial to limit caries development. Secondary findings highlighted the benefits of nitrate for systemic health (n = 5). Conclusions More clinical trials are required to confirm the impact of nitrate on oral communities. However, these findings support the hypothesis that nitrate could be used as an oral health prebiotic. Future studies should investigate whether chlorhexidine-containing mouthwashes could be replaced or complemented by a nitrate-rich diet or nitrate supplementation.
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Affiliation(s)
- Siobhan P. Moran
- School of Health and Life Sciences, University of the West of Scotland, Blantyre, UK
| | - Bob T. Rosier
- Department of Health and Genomics, Center for Advanced Research in Public Health, FISABIO Foundation, Valencia, Spain
| | - Fiona L. Henriquez
- School of Health and Life Sciences, University of the West of Scotland, Blantyre, UK
| | - Mia C. Burleigh
- School of Health and Life Sciences, University of the West of Scotland, Blantyre, UK
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Chakraborty S, Mohanty D, Chowdhury A, Krishna H, Taraphdar D, Chitnis S, Sodani S, Sahu K, Majumder SK. In vitro photoinactivation effectiveness of a portable LED device aimed for intranasal photodisinfection and a photosensitizer formulation comprising methylene blue and potassium iodide against bacterial, fungal, and viral respiratory pathogens. Lasers Med Sci 2024; 39:60. [PMID: 38353734 DOI: 10.1007/s10103-024-03996-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 01/13/2024] [Indexed: 02/16/2024]
Abstract
Antimicrobial photodynamic therapy (aPDT) can be a viable option for management of intranasal infections. However, there are light delivery, fluence, and photosensitizer-related challenges. We report in vitro effectiveness of an easily fabricated, low-cost, portable, LED device and a formulation comprising methylene blue (MB) and potassium iodide (KI) for photoinactivation of pathogens of the nasal cavity, namely, methicillin-resistant Staphylococcus aureus, antibiotic-resistant Klebsiella pneumoniae, multi-antibiotic-resistant Pseudomonas aeruginosa, Candida spp., and SARS-CoV-2.In a 96-well plate, microbial suspensions incubated with 0.005% MB alone or MB and KI formulation were exposed to different red light (~ 660 ± 25 nm) fluence using the LED device fitted to each well. Survival loss in bacteria and fungi was quantified using colony-forming unit assay, and SARS-CoV-2 photodamage was assessed by RT-PCR.The results suggest that KI addition to MB leads to KI concentration-dependent potentiation (up to ~ 5 log10) of photoinactivation in bacteria and fungi. aPDT in the presence of 25 or 50 mM KI shows the following photoinactivation trend; Gm + ve bacteria > Gm - ve bacteria > fungi > virus. aPDT in the presence of 100 mM KI, using 3- or 5-min red light exposure, results in complete eradication of bacteria or fungi, respectively. For SARS-CoV-2, aPDT using MB-KI leads to a ~ 6.5 increase in cycle threshold value.The results demonstrate the photoinactivation effectiveness of the device and MB-KI formulation, which may be helpful in designing of an optimized protocol for future intranasal photoinactivation studies in clinical settings.
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Affiliation(s)
- Sourabrata Chakraborty
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Madhya Pradesh, Indore, 452013, India
| | - Deepanwita Mohanty
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Madhya Pradesh, Indore, 452013, India
| | - Anupam Chowdhury
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Madhya Pradesh, Indore, 452013, India
| | - Hemant Krishna
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Madhya Pradesh, Indore, 452013, India
| | | | | | | | - Khageswar Sahu
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Madhya Pradesh, Indore, 452013, India.
- Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400 094, India.
| | - Shovan Kumar Majumder
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Madhya Pradesh, Indore, 452013, India
- Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400 094, India
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Brookes Z, Teoh L, Cieplik F, Kumar P. Mouthwash Effects on the Oral Microbiome: Are They Good, Bad, or Balanced? Int Dent J 2023; 73 Suppl 2:S74-S81. [PMID: 37867065 PMCID: PMC10690560 DOI: 10.1016/j.identj.2023.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 10/24/2023] Open
Abstract
This narrative review describes the oral microbiome, and its role in oral health and disease, before considering the impact of commonly used over-the-counter (OTC) mouthwashes on oral bacteria, viruses, bacteriophages, and fungi that make up these microbial communities in different niches of the mouth. Whilst certain mouthwashes have proven antimicrobial actions and clinical effectiveness supported by robust evidence, this review reports more recent metagenomics evidence, suggesting that mouthwashes such as chlorhexidine may cause "dysbiosis," whereby certain species of bacteria are killed, leaving others, sometimes unwanted, to predominate. There is little known about the effects of mouthwashes on fungi and viruses in the context of the oral microbiome (virome) in vivo, despite evidence that they "kill" certain viral pathogens ex vivo. Evidence for mouthwashes, much like antibiotics, is also emerging with regards to antimicrobial resistance, and this should further be considered in the context of their widespread use by clinicians and patients. Therefore, considering the potential of currently available OTC mouthwashes to alter the oral microbiome, this article finally proposes that the ideal mouthwash, whilst combatting oral disease, should "balance" antimicrobial communities, especially those associated with health. Which antimicrobial mouthwash best fits this ideal remains uncertain.
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Affiliation(s)
- Zoë Brookes
- Peninsula Dental School, Plymouth University, Plymouth, UK.
| | - Leanne Teoh
- Melbourne Dental School, The University of Melbourne, Carlton, Victoria, Australia
| | - Fabian Cieplik
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany
| | - Purnima Kumar
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, USA
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Brookes Z, McGrath C, McCullough M. Antimicrobial Mouthwashes: An Overview of Mechanisms-What Do We Still Need to Know? Int Dent J 2023; 73 Suppl 2:S64-S68. [PMID: 37867063 PMCID: PMC10690552 DOI: 10.1016/j.identj.2023.08.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 10/24/2023] Open
Abstract
This narrative literature review is the first in a 6-section supplement on the role of mouthwashes in oral care. This introduction briefly summarises current knowledge on antimicrobial mechanisms, relating to some of the most common over-the-counter mouthwash products available worldwide: chlorhexidine, hydrogen peroxide, cetylpyridinium chloride, povidone iodine, and essential oils. The aim of this first article is to describe how mouthwashes "kill" pathogenic microbes when used adjunctively and thus provide a basis for their widespread use to manage key oral diseases, namely caries, gingivitis, and periodontal disease. This article therefore sets the scene for subsequent, more detailed exploration of mouthwashes regarding their clinical effectiveness, impact on the oral microbiome, and possible effects on systemic health as well as natural alternatives and future directions. Other than the clinical effectiveness (for certain agents) of mouthwashes, on many topics there remains insufficient evidence for systematic review or formulation of robust national guidelines. The supplement, therefore, compiled by an international task team, is aimed at general dental practitioners across the globe, as an easy-to-read guide for helping to advise patients on mouthwash use based on the current best available evidence.
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Affiliation(s)
- Zoë Brookes
- Peninsula Dental School, Plymouth University, Plymouth, UK.
| | - Colman McGrath
- Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Michael McCullough
- Melbourne Dental School, The University of Melbourne, Melbourne, Australia
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Li E, Li S, Wang S, Li Q, Pang D, Yang Q, Zhu Q, Zou Y. Antibacterial Effects of Ramulus mori Oligosaccharides against Streptococcus mutans. Foods 2023; 12:3182. [PMID: 37685114 PMCID: PMC10486356 DOI: 10.3390/foods12173182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/18/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023] Open
Abstract
Ramulus mori has been widely used in traditional Chinese medicine because of its physiological activities, including antibacterial, anti-inflammatory, and antioxidant activities. Antimicrobial properties of Ramulus mori extract have been well described. However, no information is available regarding on Ramulus mori oligosaccharides (RMOS). The aim of this study was to investigate the effects of RMOS on the growth and virulence properties of the cariogenic bacterium Streptococcus mutans. The effects of RMOS on the biofilm structure and virulence gene expression of S. mutans were also evaluated, and the results were compared with the effects of commercial prebiotic galactooligosaccharides. RMOS were found to have an antibacterial effect against S. mutans, resulting in significant reductions in acid production, lactate dehydrogenase activity, adhesion, insoluble extracellular polysaccharide production, glucosyltransferase activity, and biofilm formation in a dose-dependent manner. Moreover, the biofilm structure was visibly damaged. A quantitative real-time PCR assay revealed downregulation of virulence gene-regulated acid production, polysaccharide production, adhesion, biofilm formation, and quorum sensing. These findings suggest that RMOS may be a promising natural product for the prevention of dental caries.
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Affiliation(s)
- Erna Li
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China; (E.L.)
| | - Shipei Li
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China; (E.L.)
- College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Siyuan Wang
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China; (E.L.)
| | - Qian Li
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China; (E.L.)
| | - Daorui Pang
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China; (E.L.)
| | - Qiong Yang
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China; (E.L.)
| | - Qiaoling Zhu
- College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Yuxiao Zou
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China; (E.L.)
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Xu X, Zhou Y, Liu C, Zhao L, Zhang L, Li H, Li Y, Cheng X. Effects of water flossing on gingival inflammation and supragingival plaque microbiota: a 12-week randomized controlled trial. Clin Oral Investig 2023; 27:4567-4577. [PMID: 37231271 PMCID: PMC10212231 DOI: 10.1007/s00784-023-05081-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 05/19/2023] [Indexed: 05/27/2023]
Abstract
OBJECTIVES The effects of water flossing on dental plaque removal have been suggested, but its ecological impact on dental plaque microbiota needs further investigation. In addition, whether this plaque control measure by water flossing promotes the control of halitosis still needs clinical validation. The aim of this study was to evaluate the effects of water flossing on gingival inflammation and supragingival plaque microbiota. MATERIALS AND METHODS Seventy participants with gingivitis were randomly assigned to control (toothbrushing) and experimental (toothbrushing + water flossing) groups (n = 35). Participants were recalled at 4, 8, and 12 weeks, and their gingival index, sulcus bleeding index, bleeding on probing, dental plaque index, and oral malodor values were measured. The microbiota of supragingival plaque was further investigated using 16S rRNA sequencing and qPCR. RESULTS Sixty-three participants completed all revisits (control: n = 33; experimental: n = 30). The experimental and control groups exhibited similar clinical characteristics and dental plaque microbiota at baseline. Adjunctive water flossing effectively reduced the gingival index and sulcus bleeding index as compared to the toothbrushing control group. The water-flossing group showed reduced oral malodor at week 12 as compared to the baseline. Consistently, the water-flossing group exhibited altered dental plaque microbiota at week 12, characterized by a depletion of Prevotella at genus level and Prevotella intermedia at species level as compared to the toothbrushing control. In addition, the plaque microbiota of water-flossing group exhibited a more aerobic phenotype, while the control group was more anaerobic. CONCLUSIONS Daily water flossing can effectively alleviate gingival inflammation and reduce oral malodor, possibly by depleting oral anaerobes and altering the oral microbiota to a more aerobic phenotype. CLINICAL RELEVANCE Water flossing adjunctive to toothbrushing effectively alleviated gingival inflammation, representing a promising oral hygiene practice to promote oral health. CLINICAL TRIAL REGISTRATION The trial was registered in the Chinese Clinical Trial Registry ( http://www.chictr.org.cn/showprojen.aspx?proj=61797 , #ChiCTR2000038508) on September 23, 2020.
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Affiliation(s)
- Xin Xu
- The State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Yishan Zhou
- The State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Chengcheng Liu
- The State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Periodontology, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Lei Zhao
- The State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Periodontology, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Ling Zhang
- The State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Haolai Li
- The State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
- State Institute of Drug/Medical Device Clinical Trial, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Yi Li
- Bixdo (SH) Healthcare Technology Co., Ltd., Shanghai, China
| | - Xingqun Cheng
- The State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.
- Department of Geriatric Dentistry, West China Hospital of Stomatology, Sichuan University, No. 14, 3rd section of Renmin South Road, Chengdu, 610041, Sichuan, China.
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Sathyan A, Kurtz I, Rathore P, Emrick T, Schiffman JD. Using Catechol and Zwitterion-Functionalized Copolymers to Prevent Dental Bacterial Adhesion. ACS APPLIED BIO MATERIALS 2023. [PMID: 37384901 DOI: 10.1021/acsabm.3c00371] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
In this manuscript, we report the synthesis of zwitterionic copolymers and their ability to form antifouling coatings on porous hydroxyapatite as a mimic of dental coatings. Specifically, we systematically investigated how altering the composition of copolymers of catechol methacrylate (Cat-MA or 2) and methacryloyloxyethyl phosphorylcholine (2-MPC) with varying catechol-to-zwitterion ratios impacted their adhesive and antifouling properties, allowing for the rational design of functional coatings. Characterization by ellipsometry, contact angle goniometry, and X-ray photoelectron spectroscopy revealed the presence of hydrophilic copolymer coatings of ∼10 nm thickness. Notably, these copolymers adhered to hydroxyapatite and reduced the level of attachment of both Gram-negative Escherichia coli and Gram-positive Streptococcus oralis. Additionally, in vitro experiments that mimicked the complex mouth environment (i.e., swallowing and using mouthwash) were employed to evaluate S. oralis adhesion, finding that the copolymer coatings reduced the quantity of adhered bacteria. We suggest that these copolymers provide insights into the design of antifouling coatings that are appropriate for use in oral care.
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Affiliation(s)
- Ashlin Sathyan
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Irene Kurtz
- Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003-9303, United States
| | - Prerana Rathore
- Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003-9303, United States
| | - Todd Emrick
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Jessica D Schiffman
- Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003-9303, United States
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Mensah A, Rodgers AM, Larrañeta E, McMullan L, Tambuwala M, Callan JF, Courtenay AJ. Treatment of Periodontal Infections, the Possible Role of Hydrogels as Antibiotic Drug-Delivery Systems. Antibiotics (Basel) 2023; 12:1073. [PMID: 37370392 DOI: 10.3390/antibiotics12061073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/08/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
With the advancement of biomedical research into antimicrobial treatments for various diseases, the source and delivery of antibiotics have attracted attention. In periodontal diseases, antibiotics are integral in positive treatment outcomes; however, the use of antibiotics is with caution as the potential for the emergence of resistant strains is of concern. Over the years, conventional routes of drug administration have been proven to be effective for the treatment of PD, yet the problem of antibiotic resistance to conventional therapies continues to remain a setback in future treatments. Hydrogels fabricated from natural and synthetic polymers have been extensively applied in biomedical sciences for the delivery of potent biological compounds. These polymeric materials either have intrinsic antibacterial properties or serve as good carriers for the delivery of antibacterial agents. The biocompatibility, low toxicity and biodegradability of some hydrogels have favoured their consideration as prospective carriers for antibacterial drug delivery in PD. This article reviews PD and its antibiotic treatment options, the role of bacteria in PD and the potential of hydrogels as antibacterial agents and for antibiotic drug delivery in PD. Finally, potential challenges and future directions of hydrogels for use in PD treatment and diagnosis are also highlighted.
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Affiliation(s)
- Adelaide Mensah
- School of Pharmacy and Pharmaceutical Sciences, Ulster University, Coleraine BT52 1SA, UK
| | - Aoife M Rodgers
- The Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, 96 Lisburn Road, Belfast BT9 7BL, UK
| | - Eneko Larrañeta
- School of Pharmacy, Queen's University Belfast, 96 Lisburn Road, Belfast BT9 7BL, UK
| | - Lyndsey McMullan
- DJ Maguire and Associates, Floor 1, Molesworth Place, Molesworth Street, Cookstown BT80 8NX, UK
| | - Murtaza Tambuwala
- Lincoln Medical School, Universities of Nottingham and Lincoln, Brayford Pool Campus, Lincoln LN6 7TS, UK
| | - John F Callan
- School of Pharmacy and Pharmaceutical Sciences, Ulster University, Coleraine BT52 1SA, UK
| | - Aaron J Courtenay
- School of Pharmacy and Pharmaceutical Sciences, Ulster University, Coleraine BT52 1SA, UK
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Contaldo M, D’Ambrosio F, Ferraro GA, Di Stasio D, Di Palo MP, Serpico R, Simeone M. Antibiotics in Dentistry: A Narrative Review of the Evidence beyond the Myth. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:6025. [PMID: 37297629 PMCID: PMC10252486 DOI: 10.3390/ijerph20116025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/18/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
Antibiotics have undoubtedly revolutionized medicine and the health and survival of patients with life-threatening infections, being nonetheless free from potential adverse effects, and the risk of intestinal dysbiosis, antimicrobial resistance, and the resulting consequences for the patient's health and the public purse. The present study narratively reviewed the epidemiological data on worldwide antibiotic consumption and administration in dental practice, patients' adherence to prescriptions, the antimicrobial resistance phenomenon in dentistry, and the evidence supporting and recommending appropriate antibiotic use in dental care. Eligible systematic reviews and original studies in humans published in the English language from January 2000 to 26 January 2023 were considered. A total of 78 studies, 47 on the epidemiology of antibiotic use and prescription in dentistry, 6 on antibiotic therapy in dentistry, 12 on antibiotic prophylaxis in dentistry, 0 on adherence of dental patients to antibiotic prescription, and 13 on antimicrobial resistance in dentistry, were presently considered. Retrieved evidence revealed that antibiotics are frequently overused and misused in dental practice, dental patients frequently do not adhere to prescriptions, and antimicrobial resistance in dentistry is a still rising phenomenon also secondary to improper oral antiseptics use. The present findings highlighted the need to establish more evidence-based and accurate antibiotic prescriptions to sensitize dentists and dental patients to minimize and rationalize the use of antibiotics only when it is indicated and necessary, improve patients' adherence, and enhance knowledge and awareness of the antimicrobial resistance in dentistry.
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Affiliation(s)
- Maria Contaldo
- Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialities, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (G.A.F.); (D.D.S.); (R.S.)
| | - Francesco D’Ambrosio
- Department of Medicine, Surgery and Dentistry, University of Salerno, 84081 Salerno, Italy;
| | - Giuseppe A. Ferraro
- Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialities, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (G.A.F.); (D.D.S.); (R.S.)
| | - Dario Di Stasio
- Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialities, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (G.A.F.); (D.D.S.); (R.S.)
| | - Maria Pia Di Palo
- Department of Medicine, Surgery and Dentistry, University of Salerno, 84081 Salerno, Italy;
| | - Rosario Serpico
- Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialities, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy; (G.A.F.); (D.D.S.); (R.S.)
| | - Michele Simeone
- Department of Neuroscience, Reproductive Science and Dentistry, University of Naples Federico II, 80138 Naples, Italy
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11
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Abbood HM, Hijazi K, Gould IM. Chlorhexidine Resistance or Cross-Resistance, That Is the Question. Antibiotics (Basel) 2023; 12:antibiotics12050798. [PMID: 37237701 DOI: 10.3390/antibiotics12050798] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/03/2023] [Accepted: 04/17/2023] [Indexed: 05/28/2023] Open
Abstract
Chlorohexidine (CHX) is a widely used biocide in clinical and household settings. Studies over the last few decades have reported CHX resistance in different bacterial species, but at concentrations well below those used in the clinical setting. Synthesis of these findings is hampered by the inconsistent compliance with standard laboratory procedures for biocide susceptibility testing. Meanwhile, studies of in vitro CHX-adapted bacteria have reported cross-resistance between CHX and other antimicrobials. This could be related to common resistance mechanisms of CHX and other antimicrobials and/or the selective pressure driven by the intensive use of CHX. Importantly, CHX resistance and cross-resistance to antimicrobials should be investigated in clinical as well as environmental isolates to further our understanding of the role of CHX in selection of multidrug resistance. Whilst clinical studies to support the hypothesis of CHX cross-resistance with antibiotics are currently lacking, we recommend raising the awareness of healthcare providers in a range of clinical disciplines regarding the potential adverse impact of the unfettered use of CHX on tackling antimicrobial resistance.
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Affiliation(s)
- Hadeel Mohammed Abbood
- Institute of Dentistry, School of Medicine, Medical Science and Nutrition, University of Aberdeen, Aberdeen AB25 2ZR, UK
- College of Dentistry, Tikrit University, Tikrit 34001, Iraq
| | - Karolin Hijazi
- Institute of Dentistry, School of Medicine, Medical Science and Nutrition, University of Aberdeen, Aberdeen AB25 2ZR, UK
| | - Ian M Gould
- Department of Medical Microbiology, Aberdeen Royal Infirmary, Aberdeen AB25 2ZN, UK
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12
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Klimkaitė L, Ragaišis I, Krasauskas R, Ružauskas M, Sužiedėlienė E, Armalytė J. Novel Antibiotic Resistance Genes Identified by Functional Gene Library Screening in Stenotrophomonas maltophilia and Chryseobacterium spp. Bacteria of Soil Origin. Int J Mol Sci 2023; 24:ijms24076037. [PMID: 37047008 PMCID: PMC10094639 DOI: 10.3390/ijms24076037] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/17/2023] [Accepted: 03/19/2023] [Indexed: 04/14/2023] Open
Abstract
As one of the most diverse habitats of microorganisms, soil has been recognised as a reservoir of both antibiotics and the antibiotic resistance genes (ARGs). Bacteria naturally inhabiting soil or water often possess innate ARGs to counteract the chemical compounds produced by competitors living in the same environment. When such bacteria are able to cause infections in immunocompromised patients, their strong innate antibiotic resistance mechanisms make treatment difficult. We generated functional gene libraries using antibiotic-resistant Stenotrophomonas maltophilia and Chryseobacterium spp. bacteria isolated from agricultural soils in Lithuania to select for the genetic determinants responsible for their resistance. We were able to find novel variants of aminoglycoside and β-lactam resistance genes, with β-lactamases isolated from the Chryseobacterium spp. functional gene library, one of which is a variant of IND-like metallo-β-lactamase (MBL) IND-17 and the other of which is a previously uncharacterised MBL we named CHM (Chryseobacterium metallo β-lactamase). Our results indicate that soil microorganisms possess a diversity of ARG variants, which could potentially be transferred to the clinical setting.
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Affiliation(s)
- Laurita Klimkaitė
- Institute of Biosciences, Life Sciences Center, Vilnius University, 10257 Vilnius, Lithuania
| | - Ignas Ragaišis
- Institute of Biosciences, Life Sciences Center, Vilnius University, 10257 Vilnius, Lithuania
| | - Renatas Krasauskas
- Institute of Biosciences, Life Sciences Center, Vilnius University, 10257 Vilnius, Lithuania
| | - Modestas Ružauskas
- Microbiology and Virology Institute, Lithuanian University of Health Sciences, 44307 Kaunas, Lithuania
| | - Edita Sužiedėlienė
- Institute of Biosciences, Life Sciences Center, Vilnius University, 10257 Vilnius, Lithuania
| | - Julija Armalytė
- Institute of Biosciences, Life Sciences Center, Vilnius University, 10257 Vilnius, Lithuania
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13
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Mahmud ASM, Seers CA, Shaikh AA, Taznin T, Uzzaman MS, Osman E, Habib MA, Akter S, Banu TA, Sarkar MMH, Goswami B, Jahan I, Okeoma CM, Khan MS, Reynolds EC. A multicentre study reveals dysbiosis in the microbial co-infection and antimicrobial resistance gene profile in the nasopharynx of COVID-19 patients. Sci Rep 2023; 13:4122. [PMID: 36914691 PMCID: PMC10009844 DOI: 10.1038/s41598-023-30504-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 02/24/2023] [Indexed: 03/16/2023] Open
Abstract
The impact of SARS-CoV-2 infection on the nasopharyngeal microbiome has not been well characterised. We sequenced genetic material extracted from nasopharyngeal swabs of SARS-CoV-2-positive individuals who were asymptomatic (n = 14), had mild (n = 64) or severe symptoms (n = 11), as well as from SARS-CoV-2-negative individuals who had never-been infected (n = 5) or had recovered from infection (n = 7). Using robust filters, we identified 1345 taxa with approximately 0.1% or greater read abundance. Overall, the severe cohort microbiome was least diverse. Bacterial pathogens were found in all cohorts, but fungal species identifications were rare. Few taxa were common between cohorts suggesting a limited human nasopharynx core microbiome. Genes encoding resistance mechanisms to 10 antimicrobial classes (> 25% sequence coverages, 315 genes, 63 non-redundant) were identified, with β-lactam resistance genes near ubiquitous. Patients infected with SARS-CoV-2 (asymptomatic and mild) had a greater incidence of antibiotic resistance genes and a greater microbial burden than the SARS-CoV-2-negative individuals. This should be considered when deciding how to treat COVID-19 related bacterial infections.
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Affiliation(s)
- A Sayeed M Mahmud
- Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-E-Khuda Road, Dhaka, 1205, Bangladesh
| | - Christine A Seers
- The Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Aftab Ali Shaikh
- Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-E-Khuda Road, Dhaka, 1205, Bangladesh
| | - Tarannum Taznin
- Jashore University of Science and Technology, Jashore, 7408, Bangladesh
| | | | - Eshrar Osman
- SciTech Consulting and Solutions, Dhaka, 1213, Bangladesh
| | - Md Ahashan Habib
- Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-E-Khuda Road, Dhaka, 1205, Bangladesh
| | - Shahina Akter
- Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-E-Khuda Road, Dhaka, 1205, Bangladesh
| | - Tanjina Akhtar Banu
- Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-E-Khuda Road, Dhaka, 1205, Bangladesh
| | - Md Murshed Hasan Sarkar
- Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-E-Khuda Road, Dhaka, 1205, Bangladesh
| | - Barna Goswami
- Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-E-Khuda Road, Dhaka, 1205, Bangladesh
| | - Iffat Jahan
- Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-E-Khuda Road, Dhaka, 1205, Bangladesh
| | - Chioma M Okeoma
- Department of Pathology, Microbiology, and Immunology, New York Medical College, 40 Sunshine Cottage Rd, Valhalla, NY, 10595, USA
| | - Md Salim Khan
- Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-E-Khuda Road, Dhaka, 1205, Bangladesh.
| | - Eric C Reynolds
- The Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute, The University of Melbourne, Parkville, VIC, 3010, Australia.
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14
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Anand BG, Shejale KP, Rajesh Kumar R, Thangam R, Prajapati KP, Kar K, Mala R. Bioactivation of an orthodontic wire using multifunctional nanomaterials to prevent plaque accumulation. BIOMATERIALS ADVANCES 2023; 148:213346. [PMID: 36963344 DOI: 10.1016/j.bioadv.2023.213346] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 01/29/2023] [Accepted: 02/12/2023] [Indexed: 02/18/2023]
Abstract
Controlling the growth of biofilm on orthodontic material has become a difficult challenge in modern dentistry. The antibacterial efficacy of currently used orthodontic material becomes limited due to the higher affinity of oral microbial flora for plaque formation on the material surface. Thus it is crutial to device an efficient strategy to prevent plaque buildup caused by pathogenic microbiota. In this work, we have fabricated a bioactive orthodontic wire using titanium nanoparticles (TiO2NPs) and silver nanoparticles (AgNPs). AgNPs were synthesized from the extracts of Ocimum sanctum, Ocimum tenuiflorum, Solanum surattense, and Syzygium aromaticum, while the TiO2NPs were synthesized by the Sol-Gel method. The nanoparticles were characterized by various biophysical techniques. The surface of the dental wire was molded by functionalizing these AgNPs followed by an additional coating of TiO2NPs. Functionalized dental wires were found to counteract the formation of tenacious intraoral biofilm, and showed an enhanced anti-bacterial effect against Multi-Drug Resistant (MDR) bacteria isolated from patients with various dental ailments. Data revealed that such surface coating counteracts the bacterial pathogens by inducing the leakage of Ag ions which eventually disrupts the cell membrane as confirmed from TEM micrographs. The results offer a significant opportunity for innovations in developing nanoparticle-based formulations to modify or fabricate an effective orthodontic material.
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Affiliation(s)
- Bibin G Anand
- Biomolecular Self Assembly Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu-603203, India; Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi- 110067, India.
| | - Kiran P Shejale
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
| | - R Rajesh Kumar
- School of Nanoscience and Technology, Indian Institute of Technology Kharagpur, West Bengal 721302, India
| | - Ramar Thangam
- Dynamic Nano-Bioengineering Lab, Department of Materials Science & Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Kailash Prasad Prajapati
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi- 110067, India
| | - Karunakar Kar
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi- 110067, India
| | - R Mala
- Department of Biotechnology, Mepco Schlenk Engineering College, Sivakasi 626123, India.
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15
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Imaizumi U, Inaba K, Kurahashi A, Kuroda H, Sanuki T, Yoshida A, Yoshino F, Hamada N. Effectiveness of curcumin-based antimicrobial photodynamic therapy against Staphylococcus aureus. J Oral Sci 2023; 65:270-274. [PMID: 37778986 DOI: 10.2334/josnusd.23-0183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
PURPOSE This study investigated the effectiveness of curcumin-based antimicrobial photodynamic therapy (aPDT) against Staphylococcus aureus (S. aureus), the causative agent of ventilator-associated pneumonia. METHODS Curcumin was added to S. aureus culture medium at concentrations of 25, 2.5, and 0.25 µM. After 60 min (20-25°C), each culture was irradiated for 1 and 3 min, and viable bacteria were counted. Curcumin (25 µM) was also added to a bacterial suspension with D-mannitol and sodium azide; microbial counts were determined after irradiation for 3 min. RESULTS S. aureus was significantly reduced in the 1-min (P = 0.043) and 3-min (P = 0.011) irradiation groups in comparison to the 0-min irradiation group with 25 µM curcumin. No significant differences were observed between the curcumin alone group and the curcumin plus D-mannitol or sodium azide group. CONCLUSION The findings of this study indicate that prolonged exposure (≥1 min) of S. aureus to LED in 25 μM curcumin solution induces cell wall injury. Curcumin-based aPDT as an adjunct to conventional oral care, employing existing dentistry equipment, offers a promising approach that does not rely on antimicrobial drugs or allows the emergence of resistant bacterial strains. This suggests its potential role in future strategies aimed at preventing ventilator-associated pneumonia.
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Affiliation(s)
- Uno Imaizumi
- Department of Dental Anesthesiology, Kanagawa Dental University
| | - Keitaro Inaba
- Department of Oral Microbiology, Kanagawa Dental University
| | | | - Hidetaka Kuroda
- Department of Dental Anesthesiology, Kanagawa Dental University
| | - Takuro Sanuki
- Department of Dental Anesthesiology, Kanagawa Dental University
| | - Ayaka Yoshida
- Department of Dental Education, Kanagawa Dental University
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16
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Denysko TV, Nazarchuk OA, Gruzevskyi O, Bahniuk NÀ, Dmytriiev DV, Chornopyschuk RM, Bebyk VV. In vitro evaluation of the antimicrobial activity of antiseptics against clinical Acinetobacter baumannii strains isolated from combat wounds. Front Microbiol 2022; 13:932467. [PMID: 36267170 PMCID: PMC9577188 DOI: 10.3389/fmicb.2022.932467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 09/05/2022] [Indexed: 11/13/2022] Open
Abstract
Healthcare-associated infections (HCAIs) are among the most prominent medical problems worldwide. In the context of increasing antibiotic resistance globally, the use of antiseptics as the main active agent and potentiator of antibiotics for the treatment of purulent-inflammatory complications of traumatic wounds, burns, and surgical wounds can be considered to tackle opportunistic infections and their prevention during war. This study presents a comparative investigation of the antimicrobial efficacy of antiseptics used for surgical antisepsis and antiseptic treatment of skin, mucous membranes, and wounds against multidrug-resistant clinical isolates of Acinetobacter baumannii as a wound pathogen of critical priority (according to the WHO). It was found that strains of A. baumannii, which have natural and acquired resistance to antimicrobial drugs, remain susceptible to modern antiseptics. Antiseptic drugs based on decamethoxine, chlorhexidine, octenidine, polyhexanide, and povidone-iodine 10% and 2% provide effective bactericidal activity against A. baumannii within the working concentrations of these drugs. Chlorhexidine and decamethoxine can inhibit biofilm formation by A. baumannii cells. In terms of bactericidal properties and biofilm formation inhibition, chlorhexidine and decamethoxine are the most effective of all tested antiseptics.
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Affiliation(s)
- Tetyana Valeriyivna Denysko
- Department of Microbiology, Virology and Immunology, National Pirogov Memorial Medical University, Vinnytsya, Ukraine
| | - Oleksandr Adamovych Nazarchuk
- Department of Microbiology, Virology and Immunology, National Pirogov Memorial Medical University, Vinnytsya, Ukraine
- *Correspondence: Oleksandr Adamovych Nazarchuk,
| | - Oleksandr Gruzevskyi
- Department of Microbiology, Virology and Immunology Odessa National Medical University, Odessa, Ukraine
| | - Nataliia Ànatoliivna Bahniuk
- Department of Microbiology, Virology and Immunology, National Pirogov Memorial Medical University, Vinnytsya, Ukraine
| | - Dmytro Valeriiovych Dmytriiev
- Department of Anesthesiology, Intensive care, and Emergency Medicine, National Pirogov Memorial Medical University, Vinnytsya, Ukraine
| | | | - Vira Volodymyrivna Bebyk
- Department of Microbiology, Virology and Immunology, National Pirogov Memorial Medical University, Vinnytsya, Ukraine
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17
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Viana AS, Botelho AMN, Feder A, Moustafa AM, Santos Silva DN, Martini CL, Ferreira ALP, Silva-Carvalho MC, Ferreira-Carvalho BT, Planet PJ, Sá Figueiredo AM. High frequency of increased triclosan MIC among CC5 MRSA and risk of misclassification of the SCCmec into types. J Antimicrob Chemother 2022; 77:3340-3348. [PMID: 36173394 DOI: 10.1093/jac/dkac322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 08/31/2022] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Typing of staphylococcal cassette chromosome mec (SCCmec) elements is commonly used for studies on the molecular epidemiology of MRSA. OBJECTIVES To perform an investigation centred on uncovering the reasons for misclassification of MRSA clonal complex 5 (CC5) SCCmec type II clinical isolates in our laboratory. METHODS MRSA isolates from CC5 were subjected to WGS and SCCmec typing. RESULTS This investigation led to the discovery that the classification failure was due to an insertion of IS1272 carrying the fabI gene on a transposable element (TnSha1) that confers increased MIC to the biocide triclosan. Genomic analysis revealed that fabI was present in 25% of the CC5 MRSA isolates sampled. The frequency of TnSha1 in our collection was much higher than that observed among publicly available genomes (0.8%; n = 24/3142 CC5 genomes). Phylogenetic analyses revealed that genomes in different CC5 clades carry TnSha1 inserted in different integration sites, suggesting that this transposon has entered CC5 MRSA genomes on multiple occasions. In at least two genotypes, ST5-SCCmecII-t539 and ST5-SCCmecII-t2666, TnSha1 seems to have entered prior to their divergence. CONCLUSIONS Our work highlights an important misclassification problem of SCCmecII in isolates harbouring TnSha1 when Boye's method is used for typing, which could have important implications for molecular epidemiology of MRSA. The importance of increased-MIC phenotype is still a matter of controversy that deserves more study given the widespread use of triclosan in many countries. Our results suggest expanding prevalence that may indicate strong selection for this phenotype.
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Affiliation(s)
- Alice Slotfeldt Viana
- Department of Medical Microbiology, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Ana Maria Nunes Botelho
- Department of Medical Microbiology, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Andries Feder
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ahmed Magdi Moustafa
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.,Children's Hospital of Philadelphia, Philadelphia, PA 19106, USA
| | | | - Caroline Lopes Martini
- Department of Medical Microbiology, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Adriana Lucia Pires Ferreira
- Department of Medical Microbiology, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,Diagnósticos da América S.A., Duque de Caxias, RJ, 25085-007, Brazil
| | - Maria Cícera Silva-Carvalho
- Department of Medical Microbiology, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | | | - Paul Joseph Planet
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.,Children's Hospital of Philadelphia, Philadelphia, PA 19106, USA
| | - Agnes Marie Sá Figueiredo
- Department of Medical Microbiology, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
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18
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Li Y, Du J, Huang S, Wang S, Wang Y, Lei L, Zhang C, Huang X. Antimicrobial Photodynamic Effect of Cross-Kingdom Microorganisms with Toluidine Blue O and Potassium Iodide. Int J Mol Sci 2022; 23:11373. [PMID: 36232675 PMCID: PMC9569606 DOI: 10.3390/ijms231911373] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/20/2022] [Accepted: 09/20/2022] [Indexed: 11/18/2022] Open
Abstract
Streptococcus mutans (S. mutans) and Candida albicans (C. albicans) are prominent microbes associated with rapid and aggressive caries. In the present study, we investigated the antimicrobial efficacy, cytotoxicity, and mechanism of toluidine blue O (TBO)-mediated antimicrobial photodynamic therapy (aPDT) and potassium iodide (KI). The dependence of KI concentration, TBO concentration and light dose on the antimicrobial effect of aPDT plus KI was determined. The cytotoxicity of TBO-mediated aPDT plus KI was analyzed by cell counting kit-8 (CCK-8) assay. A singlet oxygen (1O2) probe test, time-resolved 1O2 detection, and a 1O2 quencher experiment were performed to evaluate the role of 1O2 during aPDT plus KI. The generation of iodine and hydrogen peroxide (H2O2) were analyzed by an iodine starch test and Amplex red assay. The anti-biofilm effect of TBO-mediated aPDT plus KI was also evaluated by counting forming unit (CFU) assay. KI could potentiate TBO-mediated aPDT against S. mutans and C. albicans in planktonic and biofilm states, which was safe for human dental pulp cells. 1O2 measurement showed that KI could quench 1O2 signals, implicating that 1O2 may act as a principal mediator to oxidize excess iodide ions to form iodine and H2O2. KI could highly potentiate TBO-mediated aPDT in eradicating S. mutans and C. albicans due to the synergistic effect of molecular iodine and H2O2.
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Affiliation(s)
- Yijun Li
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School of Stomatology, Fujian Medical University, Fuzhou 350002, China
| | - Jingyun Du
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School of Stomatology, Fujian Medical University, Fuzhou 350002, China
| | - Shan Huang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School of Stomatology, Fujian Medical University, Fuzhou 350002, China
| | - Shaofeng Wang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School of Stomatology, Fujian Medical University, Fuzhou 350002, China
| | - Yanhuang Wang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School of Stomatology, Fujian Medical University, Fuzhou 350002, China
| | - Lishan Lei
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School of Stomatology, Fujian Medical University, Fuzhou 350002, China
| | - Chengfei Zhang
- Restorative Dental Sciences (Endodontics), Faculty of Dentistry, The University of Hong Kong, Hong Kong 999077, China
| | - Xiaojing Huang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Lab of Fujian College and University, School of Stomatology, Fujian Medical University, Fuzhou 350002, China
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19
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Cymbopogon citratus Essential Oil Increases the Effect of Digluconate Chlorhexidine on Microcosm Biofilms. Pathogens 2022; 11:pathogens11101067. [PMID: 36297124 PMCID: PMC9607486 DOI: 10.3390/pathogens11101067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/24/2022] [Accepted: 09/08/2022] [Indexed: 12/03/2022] Open
Abstract
The aim of this study was to evaluate the effect of the Cymbopogon citratus essential oil and its association with chlorhexidine on cariogenic microcosm biofilm composition and acidogenicity. Minimum inhibitory and bactericide concentrations from the essential oil and chlorhexidine were determined by broth microdilution assay. Microcosms (polymicrobial) biofilms were produced on glass coverslips, using inoculum from human saliva in McBain culture medium (0.5% sucrose exposure for 6 h/day) for 3 days in 24-well plates. The biofilms were treated twice a day and their composition was evaluated by microorganism quantification. The acidogenicity was evaluated by measuring the pH of the spent culture medium in contact with the biofilm. Overall, the association of C. citratus and chlorhexidine reduced total bacterial counts and aciduric bacteria (maximum reduction of 3.55 log UFC/mL) in microcosm biofilms. This group also presented the lowest acidogenicity even when exposed to sucrose-containing medium. C. citratus essential oil increases the effect of digluconate chlorhexidine on microcosm biofilms. Based on these findings, this study can contribute to the development of new formulations that might allow for the use of mouthwashes for a shorter period, which may reduce undesirable effects and increase patient compliance to the treatment.
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20
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Ribeiro JS, Sanz CK, Münchow EA, Kalra N, Dubey N, Suárez CEC, Fenno JC, Lund RG, Bottino MC. Photocrosslinkable methacrylated gelatin hydrogel as a cell-friendly injectable delivery system for chlorhexidine in regenerative endodontics. Dent Mater 2022; 38:1507-1517. [PMID: 35882570 PMCID: PMC11022590 DOI: 10.1016/j.dental.2022.07.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/28/2022] [Accepted: 07/12/2022] [Indexed: 01/06/2023]
Abstract
OBJECTIVES This work sought to formulate photocrosslinkable chlorhexidine (CHX)-laden methacrylated gelatin (CHX/GelMA) hydrogels with broad spectrum of action against endodontic pathogens as a clinically viable cell-friendly disinfection therapy prior to regenerative endodontics procedures. METHODS CHX/GelMA hydrogel formulations were successfully synthesized using CHX concentrations between 0.12 % and 5 % w/v. Hydrogel microstructure was evaluated by scanning electron microscopy (SEM). Swelling and enzymatic degradation were assessed to determine microenvironmental effects. Compression test was performed to investigate the influence of CHX incorporation on the hydrogels' biomechanics. The antimicrobial and anti-biofilm potential of the formulated hydrogels were assessed using agar diffusion assays and a microcosms biofilm model, respectively. The cytocompatibility was evaluated by exposing stem cells from human exfoliated deciduous teeth (SHEDs) to hydrogel extracts (i.e., leachable byproducts obtained from overtime hydrogel incubation in phosphate buffer saline). The data were analyzed using One- and Two-way ANOVA and Tukey's test (α = 0.05). RESULTS CHX/GelMA hydrogels were effectively prepared. NMR spectroscopy confirmed the incorporation of CHX into GelMA. The addition of CHX did not change the micromorphology (pore size) nor the swelling profile (p > 0.05). CHX incorporation reduced the degradation rate of the hydrogels (p < 0.001); whereas, it contributed to increased compressive modulus (p < 0.05). Regarding the antimicrobial properties, the incorporation of CHX showed a statistically significant decrease in the number of bacteria colonies at 0.12 % and 0.5 % concentration (p < 0.001) and completely inhibited the growth of biofilm at concentration levels 1 %, 2 %, and 5 %. Meanwhile, the addition of CHX, regardless of the concentration, did not lead to cell toxicity, as cell viability values were above 70 %. SIGNIFICANCE The addition of CHX into GelMA showed significant antimicrobial action against the pathogens tested, even at low concentrations, with the potential to be used as a cell-friendly injectable drug delivery system for root canal disinfection prior to regenerative endodontics.
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Affiliation(s)
- Juliana S Ribeiro
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, United States; Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Carolina K Sanz
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, United States; Metallurgical and Materials Engineering Program (COPPE), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Eliseu A Münchow
- Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Nikhil Kalra
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, United States
| | - Nileshkumar Dubey
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, United States; Discipline of Oral Sciences, Faculty of Dentistry, National University of Singapore, Singapore
| | - Carlos Enrique C Suárez
- Dental Materials Laboratory, Academic Area of Dentistry, Autonomous University of Hidalgo State, Circuito Ex Hacienda La Concepción S/N, 42160 San Agustín Tlaxiaca, Hidalgo, Mexico
| | - J Christopher Fenno
- Department of Biologic and Materials Sciences & Prosthodontics, University of Michigan School of Dentistry, Ann Arbor, MI, United States
| | - Rafael G Lund
- Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Marco C Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, United States; Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, United States.
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Lima NG, Monteiro RM, Torres CP, de Souza-Gabriel AE, Watanabe E, Borsatto MC. Influence of antimicrobial photodynamic therapy with different pre-irradiation times on children's dental biofilm: randomized clinical trial. Eur Arch Paediatr Dent 2022; 23:897-904. [PMID: 35666375 DOI: 10.1007/s40368-022-00716-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 05/03/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE Photodynamic therapy (PDT) is effective in reducing pathogenic microorganisms in the oral cavity and in preventing dental diseases. This study evaluated the pre-irradiation time using PDT (diode laser associated with 0.01% methylene blue) to decrease the number of microorganisms in the visible plaque in permanent teeth. METHODS This randomized clinical trial included 108 homologous lower permanent first molars (36 and 46) with biofilm from 54 children aged six to 12 years. PDT was performed (0.01% methylene blue photosensitizer/therapeutic laser-InGaAIP), according to the following protocols: Group 1, biofilm collection of the distal area of the lingual surface of 36 µm before PDT; group 2, mesial area of the lingual surface of 36 µm 1 min after PDT; group 3, area of the lingual surface of 46 µm before PDT; and group 4, mesial area of the lingual surface of 46 µm 5 min after PDT. RESULTS After statistical analysis, significant differences were observed between the groups (p = 0.000). In groups 2 and 4, the number of bacteria tended to decrease, with a more evident bacterial reduction in group 4. CONCLUSIONS Pre-irradiation reduced the number of colony-forming units of mature bacterial biofilms in vivo. A time of 5 min resulted in a greater reduction in the number of colony-forming units. CLINICAL TRIAL REGISTRATION ReBEC Identifier: RBR-6bqfp3; Date of Register: March 2nd, 2020. Retrospectively Registered.
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Affiliation(s)
- N G Lima
- Department of Pediatric Clinics, Departamento de Clínica Infantil, Faculdade de Odontologia de Ribeirão Preto, Ribeirão Preto Dental School, University of São Paulo (USP), Av. do Café, s/n Subsetor Oeste 11, Ribeirão Prêto, SP, 14040-940, Brazil
| | - R M Monteiro
- Department of Fundamental Nursing, The College of Nursing, University of São Paulo, Ribeirão Prêto, SP, Brazil
| | - C P Torres
- Department of Pediatric Clinics, Departamento de Clínica Infantil, Faculdade de Odontologia de Ribeirão Preto, Ribeirão Preto Dental School, University of São Paulo (USP), Av. do Café, s/n Subsetor Oeste 11, Ribeirão Prêto, SP, 14040-940, Brazil
| | - A E de Souza-Gabriel
- Department of Restorative Dentistry, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Prêto, SP, Brazil
| | - E Watanabe
- Department of Restorative Dentistry, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Prêto, SP, Brazil
| | - M C Borsatto
- Department of Pediatric Clinics, Departamento de Clínica Infantil, Faculdade de Odontologia de Ribeirão Preto, Ribeirão Preto Dental School, University of São Paulo (USP), Av. do Café, s/n Subsetor Oeste 11, Ribeirão Prêto, SP, 14040-940, Brazil.
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22
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Evidence on the Use of Mouthwash for the Control of Supragingival Biofilm and Its Potential Adverse Effects. Antibiotics (Basel) 2022; 11:antibiotics11060727. [PMID: 35740134 PMCID: PMC9219991 DOI: 10.3390/antibiotics11060727] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/19/2022] [Accepted: 05/26/2022] [Indexed: 12/14/2022] Open
Abstract
Antimicrobial mouthwash improves supragingival biofilm control when used in conjunction with mechanical removal as part of an oral hygiene routine. Mouthwash is intended to suppress bacterial adhesion during biofilm formation processes and is not aimed at mature biofilms. The most common evidence-based effects of mouthwash on the subgingival biofilm include the inhibition of biofilm accumulation and its anti-gingivitis property, followed by its cariostatic activities. There has been no significant change in the strength of the evidence over the last decade. A strategy for biofilm control that relies on the elimination of bacteria may cause a variety of side effects. The exposure of mature oral biofilms to mouthwash is associated with several possible adverse reactions, such as the emergence of resistant strains, the effects of the residual structure, enhanced pathogenicity following retarded penetration, and ecological changes to the microbiota. These concerns require further elucidation. This review aims to reconfirm the intended effects of mouthwash on oral biofilm control by summarizing systematic reviews from the last decade and to discuss the limitations of mouthwash and potential adverse reactions to its use. In the future, the strategy for oral biofilm control may shift to reducing the biofilm by detaching it or modulating its quality, rather than eliminating it, to preserve the benefits of the normal resident oral microflora.
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van de Lagemaat M, Stockbroekx V, Geertsema-Doornbusch GI, Dijk M, Carniello V, Woudstra W, van der Mei HC, Busscher HJ, Ren Y. A Comparison of the Adaptive Response of Staphylococcus aureus vs. Streptococcus mutans and the Development of Chlorhexidine Resistance. Front Microbiol 2022; 13:861890. [PMID: 35694293 PMCID: PMC9186159 DOI: 10.3389/fmicb.2022.861890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 04/11/2022] [Indexed: 11/14/2022] Open
Abstract
Antimicrobials with nonselective antibacterial efficacy such as chlorhexidine can be effective in reducing biofilm, but bear the risk of inducing resistance in specific bacteria. In clinical practice, bacteria such as Staphylococcus aureus have been found resistant to chlorhexidine, but other bacteria, including Streptococcus mutans, have largely remained susceptible to chlorhexidine despite its widespread use in oral healthcare. Here, we aim to forward a possible reason as to why S. aureus can acquire resistance against chlorhexidine, while S. mutans remains susceptible to chlorhexidine. Measurement of surface-enhanced fluorescence indicated that chlorhexidine caused gradual, but irreversible deformation to adhering green fluorescent S. aureus due to irreparable damage to the cell wall. Concurrently, the metabolic activity of adhering staphylococci was higher than of planktonic bacteria, suggesting efflux mechanisms may have been activated upon cell wall deformation, impeding the buildup of a high chlorhexidine concentration in the cytoplasm and therewith stimulating the development of chlorhexidine resistance in S. aureus. Exposure of S. mutans to chlorhexidine caused immediate, but reversible deformation in adhering streptococci, indicative of rapid self-repair of cell wall damage done by chlorhexidine. Due to cell wall self-repair, S. mutans will be unable to effectively reduce the chlorhexidine concentration in the cytoplasm causing solidification of the cytoplasm. In line, no increased metabolic activity was observed in S. mutans during exposure to chlorhexidine. Therewith, self-repair is suicidal and prevents the development of a chlorhexidine-resistant progeny in S. mutans.
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Affiliation(s)
- Marieke van de Lagemaat
- University of Groningen and University Medical Center Groningen, Department of Orthodontics, Groningen, Netherlands
| | - Valerie Stockbroekx
- University of Groningen and University Medical Center Groningen, Department of Orthodontics, Groningen, Netherlands
| | - Gésinda I. Geertsema-Doornbusch
- University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Groningen, Netherlands
| | - Melissa Dijk
- University of Groningen and University Medical Center Groningen, Department of Orthodontics, Groningen, Netherlands
| | - Vera Carniello
- University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Groningen, Netherlands
| | - Willem Woudstra
- University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Groningen, Netherlands
| | - Henny C. van der Mei
- University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Groningen, Netherlands
- *Correspondence: Henny C. van der Mei,
| | - Henk J. Busscher
- University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, Groningen, Netherlands
| | - Yijin Ren
- University of Groningen and University Medical Center Groningen, Department of Orthodontics, Groningen, Netherlands
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In Vitro Evaluation of Biological Activities of Canes and Pomace Extracts from Several Varieties of Vitis vinifera L. for Inclusion in Freeze-Drying Mouthwashes. Antioxidants (Basel) 2022; 11:antiox11020218. [PMID: 35204101 PMCID: PMC8868111 DOI: 10.3390/antiox11020218] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/16/2022] [Accepted: 01/17/2022] [Indexed: 02/05/2023] Open
Abstract
In this study, the biological activities of four extracts from Vitis vinifera by-products: two pomace extracts, white (WPE) and red (RPE), a canes extract (CE), and their combination (CoE), were evaluated, to be included in freeze-drying mouthwashes formulations. The cytocompatibility and anticancerous potential of the four extracts were tested on three cancerous cell lines, as well as the cytoprotective activity against nicotine-induced cytotoxicity and the antioxidant potential determined on a human gingival fibroblasts (HGF) cell line. Additionally, the anti-inflammatory activity and the antimicrobial activity against several microorganisms from the oral microbiome were tested. Freeze-dried mouthwashes with CoE were prepared and characterized, both as lyophilizates and after reconstitution. The four tested extracts showed the highest cytotoxicity on MDA-kb2 cell line. The antioxidant potential was demonstrated for WPE, RPE, CE, and CoE, both in non-stimulated and H2O2 stimulated conditions. The four extracts reduced the levels of proinflammatory cytokines (IL-6, IL-8, and IL-1β) in a dose-dependent manner, confirming their anti-inflammatory activity. The antimicrobial activity of tested extracts was shown against pathogenic bacteria from the oral microbiome. Mouthwashes of CoE with poloxamer-407, xylitol, and different ratios of mannitol were prepared by freeze-drying leading to porous formulations with interesting mechanical properties and reconstitution times.
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25
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Vinel A, Al Halabi A, Roumi S, Le Neindre H, Millavet P, Simon M, Cuny C, Barthet JS, Barthet P, Laurencin-Dalicieux S. Non-surgical Periodontal Treatment: SRP and Innovative Therapeutic Approaches. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1373:303-327. [DOI: 10.1007/978-3-030-96881-6_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Huang S, Wu M, Li Y, Du J, Chen S, Jiang S, Huang X, Zhan L. The dlt operon contributes to the resistance to chlorhexidine in Streptococcus mutans. Int J Antimicrob Agents 2022; 59:106540. [DOI: 10.1016/j.ijantimicag.2022.106540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 01/01/2022] [Accepted: 01/19/2022] [Indexed: 11/05/2022]
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Nowaczyk PM, Bajerska J, Lasik-Kurdyś M, Radziejewska-Kubzdela E, Szwengiel A, Woźniewicz M. The effect of cranberry juice and a cranberry functional beverage on the growth and metabolic activity of selected oral bacteria. BMC Oral Health 2021; 21:660. [PMID: 34930215 PMCID: PMC8686276 DOI: 10.1186/s12903-021-02025-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 12/03/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The oral microbiota is a significant risk indicator for oral diseases, such as dental caries and periodontal inflammation. Much attention is presently paid to the development of functional foods (e.g. beverages containing cranberry constituents, or foods containing probiotics) that may serve as adjuncts for oral disease treatments (e.g. periodontitis and caries). Cranberry fruit, due to its unique chemical composition and antimicrobial potential, is a possible ingredient of such foods. The study aimed to investigate the effects of cranberry juice (CJ) and a cranberry functional beverage (mixture of 80% v/v apple juice, 20% v/v cranberry juice, and 0.25 g/100 mL ground cinnamon; CFB) on the growth and metabolic activity of selected oral bacteria. METHODS Serial dilution pour plate method (SDPP) was used to examine the effect of CJ and CFB on the growth of Actinomyces naeslundii, Streptococcus mutans, and Lactobacillus paracasei subsp. paracasei. 48-h electrical impedance measurements (EIM) during the cultivation of A. naeslundii were applied to evaluate the utility of the method as a rapid alternative for the assessment of the antimicrobial potential of cranberry beverages. RESULTS The tested bacteria differed in their susceptibility to the antimicrobial action of CJ and CFB, with L. paracasei subsp. paracasei being least vulnerable to CFB (according to SDPP). Although CJ at a concentration of 0.5 mL/mL, showed a bactericidal effect on the growth of S. mutans, A. naeslundii was more sensitive to CJ (SDPP). Its inhibitory effect on A. naeslundii was seen even at concentrations as small as 0.03125-0.125 mL/mL (SDPP and EIM). On the other hand, S. mutans seemed to be more vulnerable to CFB than A. naeslundii (SDPP). CONCLUSIONS CFB may be considered an adjunct in the treatment of oral diseases due to its action against selected oral pathogens, and not against the presumably beneficial L. paracasei subsp. paracasei. Bioelectrical impedance measurements appear to be a quick alternative to evaluating the antimicrobial activity of fruit beverages, but their utility should be confirmed with tests on other bacteria.
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Affiliation(s)
- Paulina M Nowaczyk
- Department of Sports Dietetics, Faculty of Health Sciences, Poznan University of Physical Education, Królowej Jadwigi 27/39, 61-871, Poznan, Poland
| | - Joanna Bajerska
- Department of Human Nutrition and Dietetics, Faculty of Food Sciences and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624, Poznań, Poland
| | - Małgorzata Lasik-Kurdyś
- Department of Food Technology of Plant Origin, Faculty of Food Sciences and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624, Poznań, Poland
| | - Elżbieta Radziejewska-Kubzdela
- Department of Food Technology of Plant Origin, Faculty of Food Sciences and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624, Poznań, Poland
| | - Artur Szwengiel
- Department of Food Technology of Plant Origin, Faculty of Food Sciences and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624, Poznań, Poland
| | - Małgorzata Woźniewicz
- Department of Human Nutrition and Dietetics, Faculty of Food Sciences and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624, Poznań, Poland.
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28
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Chanachai S, Chaichana W, Insee K, Benjakul S, Aupaphong V, Panpisut P. Physical/Mechanical and Antibacterial Properties of Orthodontic Adhesives Containing Calcium Phosphate and Nisin. J Funct Biomater 2021; 12:jfb12040073. [PMID: 34940552 PMCID: PMC8706961 DOI: 10.3390/jfb12040073] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/01/2021] [Accepted: 12/08/2021] [Indexed: 11/30/2022] Open
Abstract
Enamel demineralization around orthodontic adhesive is a common esthetic concern during orthodontic treatment. The aim of this study was to prepare orthodontic adhesives containing monocalcium phosphate monohydrate (MCPM) and nisin to enable mineralizing and antibacterial actions. The physicomechanical properties and the inhibition of S. mutans growth of the adhesives with added MCPM (5, 10 wt %) and nisin (5, 10 wt %) were examined. Transbond XT (Trans) was used as the commercial comparison. The adhesive containing a low level of MCPM showed significantly higher monomer conversion (42–62%) than Trans (38%) (p < 0.05). Materials with additives showed lower monomer conversion (p < 0.05), biaxial flexural strength (p < 0.05), and shear bond strength to enamel than those of a control. Additives increased water sorption and solubility of the experimental materials. The addition of MCPM encouraged Ca and P ion release, and the precipitation of calcium phosphate at the bonding interface. The growth of S. mutans in all the groups was comparable (p > 0.05). In conclusion, experimental orthodontic adhesives with additives showed comparable conversion but lesser mechanical properties than the commercial material. The materials showed no antibacterial action, but exhibited ion release and calcium phosphate precipitation. These properties may promote remineralization of the demineralized enamel.
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Affiliation(s)
- Supachai Chanachai
- Division of Orthodontics, Faculty of Dentistry, Thammasat University, Pathum Thani 12120, Thailand; (S.C.); (W.C.); (K.I.); (S.B.)
| | - Wirinrat Chaichana
- Division of Orthodontics, Faculty of Dentistry, Thammasat University, Pathum Thani 12120, Thailand; (S.C.); (W.C.); (K.I.); (S.B.)
| | - Kanlaya Insee
- Division of Orthodontics, Faculty of Dentistry, Thammasat University, Pathum Thani 12120, Thailand; (S.C.); (W.C.); (K.I.); (S.B.)
| | - Sutiwa Benjakul
- Division of Orthodontics, Faculty of Dentistry, Thammasat University, Pathum Thani 12120, Thailand; (S.C.); (W.C.); (K.I.); (S.B.)
| | - Visakha Aupaphong
- Division of Oral Biology, Faculty of Dentistry, Thammasat University, Pathum Thani 12120, Thailand;
| | - Piyaphong Panpisut
- Division of Restorative Dentistry, Thammasat University, Pathum Thani 12120, Thailand
- Thammasat University Research Unit in Dental and Bone Substitute Biomaterials, Thammasat University, Pathum Thani 12120, Thailand
- Correspondence:
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Abstract
Mediators of the initiation, development, and recurrence of periodontitis include the oral microbiome embedded in subgingival plaque and the host immune response to a dysbiosis within this dynamic and complex microbial community. Although mediators have been studied extensively, researchers in the field have been unable to fully ascribe certain clinical presentations of periodontitis to their nature. Emergence of high-throughput sequencing technologies has resulted in better characterization of the microbial oral dysbiosis that extends beyond the extensively studied putative bacterial periodontopathogens to a shift in the oral virome composition during disease conditions. Although the biological dark matter inserted by retroviruses was once believed to be nonfunctional, research has revealed that it encodes historical viral-eukaryotic interactions and influences host development. The objective of this review is to evaluate the proposed association of herpesviruses to the etiology and pathogenesis of periodontal disease and survey the highly abundant prokaryotic viruses to delineate their potential roles in biofilm dynamics, as well as their interactions with putative bacterial periodontopathogens and eukaryotic cells. The findings suggest that potential novel periodontal therapies targeting or utilizing the oral virome can alleviate certain clinical presentations of periodontitis. Perhaps it is time to embrace the viral dark matter within the periodontal environment to fully comprehend the pathogenesis and systemic implications of periodontitis.
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Affiliation(s)
- April Martínez
- Orofacial Sciences DepartmentSchool of DentistryUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
| | - Ryutaro Kuraji
- Orofacial Sciences DepartmentSchool of DentistryUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
- Department of Life Science DentistryThe Nippon Dental UniversityTokyoJapan
- Department of PeriodontologyThe Nippon Dental University School of Life Dentistry at TokyoTokyoJapan
| | - Yvonne L. Kapila
- Orofacial Sciences DepartmentSchool of DentistryUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
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30
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Winning L, Lundy FT, Blackwood B, McAuley DF, El Karim I. Oral health care for the critically ill: a narrative review. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2021; 25:353. [PMID: 34598718 PMCID: PMC8485109 DOI: 10.1186/s13054-021-03765-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 09/11/2021] [Indexed: 12/13/2022]
Abstract
Background The link between oral bacteria and respiratory infections is well documented. Dental plaque has the potential to be colonized by respiratory pathogens and this, together with microaspiration of oral bacteria, can lead to pneumonia particularly in the elderly and critically ill. The provision of adequate oral care is therefore essential for the maintenance of good oral health and the prevention of respiratory complications. Main body Numerous oral
care practices are utilised for intubated patients, with a clear lack of consensus on the best approach for oral care. This narrative review aims to explore the oral-lung connection and discuss in detail current oral care practices to identify shortcomings and offer suggestions for future research. The importance of adequate oral care has been recognised in guideline interventions for the prevention of pneumonia, but practices differ and controversy exists particularly regarding the use of chlorhexidine. The oral health assessment is also an important but often overlooked element of oral care that needs to be considered. Oral care plans should ideally be implemented on the basis of an individual oral health assessment. An oral health assessment prior to provision of oral care should identify patient needs and facilitate targeted oral care interventions. Conclusion Oral health is an important consideration in the management of the critically ill. Studies have suggested benefit in the reduction of respiratory complication such as Ventilator Associated Pneumonia associated with effective oral health care practices. However, at present there is no consensus as to the best way of providing optimal oral health care in the critically ill. Further research is needed to standardise oral health assessment and care practices to enable development of evidenced based personalised oral care for the critically ill.
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Affiliation(s)
- Lewis Winning
- Dublin Dental University Hospital, Trinity College Dublin, Dublin, Ireland
| | - Fionnuala T Lundy
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, The Wellcome-Wolfson Building, 97 Lisburn Road, Belfast, BT9 7AE, Northern Ireland, UK
| | - Bronagh Blackwood
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, The Wellcome-Wolfson Building, 97 Lisburn Road, Belfast, BT9 7AE, Northern Ireland, UK
| | - Daniel F McAuley
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, The Wellcome-Wolfson Building, 97 Lisburn Road, Belfast, BT9 7AE, Northern Ireland, UK
| | - Ikhlas El Karim
- Centre for Experimental Medicine, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, The Wellcome-Wolfson Building, 97 Lisburn Road, Belfast, BT9 7AE, Northern Ireland, UK.
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Poornima P, Krithikadatta J, Ponraj RR, Velmurugan N, Kishen A. Biofilm formation following chitosan-based varnish or chlorhexidine-fluoride varnish application in patients undergoing fixed orthodontic treatment: a double blinded randomised controlled trial. BMC Oral Health 2021; 21:465. [PMID: 34556107 PMCID: PMC8459499 DOI: 10.1186/s12903-021-01805-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 08/12/2021] [Indexed: 11/17/2022] Open
Abstract
Background Orthodontic treatment poses an increased risk of plaque accumulation and demineralisation of enamel leading to white spot lesion around the brackets. This parallel arm trial aims to assess the degree of bacterial plaque formation adjacent to orthodontic brackets, following the application of a chitosan-based varnish or chlorhexidene-fluoride varnish. Methods A total of 200 teeth from 20 patients undergoing fixed orthodontic therapy were assessed and biofilm formation around the brackets were recorded using the Bonded Bracket Index (Plaque index) at baseline and weekly for 6 weeks. The bacterial count and plaque pH at corresponding weekly intervals were also recorded. Following bracket bonding, the patients were cluster randomised to receive chitosan-based varnish-CHS (UNO Gel Bioschell, Germiphene corp., Brantford, Canada) or chlorhexidine-fluoride varnish-CFV (Cervitec F, Ivoclar Vivadent, Schaan, Liechtenstein) every week on the representative teeth respectively. BBI proportions were compared between groups at all time intervals using Chi square test. Mean plaque bacterial count and plaque pH were compared using Mann Whitney U test and Tukey’s HSD test respectively. Results Baseline characteristics were similar between the groups: Mean age was CHS = 23 and CFV = 21; male to female ratio was CHS = 5/5, CFV = 7/3. At the end of 6 weeks, chitosan-based varnish performed equal to chlorhexidine-fluoride varnish (P > 0.05) with 98% and 95% of teeth with acceptable scores respectively. The plaque bacterial count significantly reduced at 6 weeks for both varnish compared to the baseline; The value for CHS was 0.43 ± 0.4 × 104 and CFV was 0.77 ± 0.64 × 104 CFU (P < 0.05), with no difference between both the varnishes. Both varnishes had no effect on the plaque pH that remained neutral. Conclusion This trial showed that both chitosan-based varnish and chlorhexidine-fluoride varnish reduced bacterial count, while the plaque pH remained neutral over a period of six weeks in patients undergoing fixed orthodontic therapy. The anti-plaque effects of the natural biopolymeric chitosan-based varnish was similar to that of chlorhexidine-fluoride varnish, a known chemotherapeutic agent. Registration: This trial protocol was registered with https://www.ctri.nic.in (CTRI/2019/05/018896). (Date of registration 02/05/2019). Protocol: The protocol was not published before trial commencement.
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Affiliation(s)
- Preethi Poornima
- Department of Conservative Dentistry and Endodontics, Faculty of Dentistry, MAHER, Chennai, India
| | | | | | | | - Anil Kishen
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada.
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32
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Brookes ZLS, Belfield LA, Ashworth A, Casas-Agustench P, Raja M, Pollard AJ, Bescos R. Effects of chlorhexidine mouthwash on the oral microbiome. J Dent 2021; 113:103768. [PMID: 34418463 DOI: 10.1016/j.jdent.2021.103768] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 07/11/2021] [Accepted: 07/29/2021] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION/OBJECTIVES Chlorhexidine (CHX) is a commonly used mouthwash with potent anti-microbial effects useful for the management of oral disease. However, we are moving away from the view of simply 'killing' bacteria, towards managing oral microbial ecosystems (oral microbiome), as an integrated system, to promote oral and systemic health. Here, we aimed to review the effects of CHX mouthwash on the balance of microbial communities in the mouth in vivo in oral health and disease. SOURCES AND STUDY SECTION The hierarchy of evidence was applied, with systematic reviews and randomised controlled trials consulted where available and case controlled studies being described thereafter. Search terms for each subject category were entered into MEDLINE, PubMed, Google Scholar and the Cochrane database. Focussing on metagenomics studies provides unique overview of the oral microbiome as an integrated system. DATA Evidence was limited, but several next generation sequencing case-controlled studies suggested that in an integrated system, CHX may cause a shift towards lower bacterial diversity and abundance, in particular nitrate-reducing bacteria in vivo. CHX also appeared to alter salivary pH, lactate, nitrate and nitrite concentrations in saliva. Evidence regarding the effects of CHX on the oral microbiome during oral disease is still emerging. CONCLUSIONS CHX alters the composition the oral microbiome. However, as CHX use remains widespread in dentistry to manage oral disease, urgent research using metagenomics studies of microbial communities in vivo are still needed to determine CHX mouthwash is 'good', 'bad' or otherwise for bacteria, in the context of oral and systemic health.
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Affiliation(s)
- Zoë L S Brookes
- Peninsula Dental School, Faculty of Health, University of Plymouth, Plymouth, PL4 8AA, United Kingdom.
| | - Louise A Belfield
- Peninsula Dental School, Faculty of Health, University of Plymouth, Plymouth, PL4 8AA, United Kingdom
| | - Ann Ashworth
- Institute of Health & Community, University of Plymouth, Plymouth, PL4 8AA, United Kingdom
| | - Patricia Casas-Agustench
- School of Health Professions, Faculty of Health, University of Plymouth, Plymouth, PL4 8AA, United Kingdom; Department of Health Sciences, Open University of Catalonia, Barcelona, Spain
| | | | - Alexander J Pollard
- Peninsula Dental School, Faculty of Health, University of Plymouth, Plymouth, PL4 8AA, United Kingdom; Bristol Dental School, University of Bristol, Bristol BS1 2LY, United Kingdom
| | - Raul Bescos
- School of Health Professions, Faculty of Health, University of Plymouth, Plymouth, PL4 8AA, United Kingdom.
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Papke R. Letter to the editor regarding "Chemical disinfection in healthcare settings: critical aspects for the development of global strategies". GMS HYGIENE AND INFECTION CONTROL 2021; 16:Doc22. [PMID: 34354901 PMCID: PMC8299059 DOI: 10.3205/dgkh000393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Roald Papke
- Sana Klinikum Lichtenberg, Berlin, Germany,*To whom correspondence should be addressed: Roald Papke, Sana Klinikum Lichtenberg, Fanningerstraße 32, 10365 Berlin, Germany
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Sliwkanich L, Ouanounou A. Mouthguards in dentistry: Current recommendations for dentists. Dent Traumatol 2021; 37:661-671. [PMID: 34019343 DOI: 10.1111/edt.12686] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 04/25/2021] [Accepted: 04/26/2021] [Indexed: 12/17/2022]
Abstract
Properly fitted mouthguards reduce the risk and severity of orofacial injury, to both hard and soft tissues, preventing thousands of dollars of trauma management. In this review, findings from recent research will be evaluated to discuss the strengths and limitations of the different types of mouthguards, including their indications by sport. Design, ideal dimensions, and other characteristics will also be explored. Additionally, patient education and motivation will be examined, with a focus on the dentist's role in this regard. Finally, in addition to proper oral hygiene, the importance of proper mouthguard maintenance and evaluation will be discussed. This review will therefore be able to act as a guide for dentists looking to provide patients of all ages with personal protective equipment and stay up-to-date on recent developments in this branch of the sports dentistry field.
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Affiliation(s)
- Laura Sliwkanich
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - Aviv Ouanounou
- Department of Clinical Sciences (pharmacology & Preventive Dentistry), Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
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Biofilm viability checker: An open-source tool for automated biofilm viability analysis from confocal microscopy images. NPJ Biofilms Microbiomes 2021; 7:44. [PMID: 33990612 PMCID: PMC8121819 DOI: 10.1038/s41522-021-00214-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 03/12/2021] [Indexed: 12/15/2022] Open
Abstract
Quantifying biofilm formation on surfaces is challenging because traditional microbiological methods, such as total colony-forming units (CFUs), often rely on manual counting. These are laborious, resource intensive techniques, more susceptible to human error. Confocal laser scanning microscopy (CLSM) is a high-resolution technique that allows 3D visualisation of biofilm architecture. In combination with a live/dead stain, it can be used to quantify biofilm viability on both transparent and opaque surfaces. However, there is little consensus on the appropriate methodology to apply in confocal micrograph processing. In this study, we report the development of an image analysis approach to repeatably quantify biofilm viability and surface coverage. We also demonstrate its use for a range of bacterial species and translational applications. This protocol has been created with ease of use and accessibility in mind, to enable researchers who do not specialise in computational techniques to be confident in applying these methods to analyse biofilm micrographs. Furthermore, the simplicity of the method enables the user to adapt it for their bespoke needs. Validation experiments demonstrate the automated analysis is robust and accurate across a range of bacterial species and an improvement on traditional microbiological analysis. Furthermore, application to translational case studies show the automated method is a reliable measurement of biomass and cell viability. This approach will ensure image analysis is an accessible option for those in the microbiology and biomaterials field, improve current detection approaches and ultimately support the development of novel strategies for preventing biofilm formation by ensuring comparability across studies.
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Buonavoglia A, Leone P, Solimando AG, Fasano R, Malerba E, Prete M, Corrente M, Prati C, Vacca A, Racanelli V. Antibiotics or No Antibiotics, That Is the Question: An Update on Efficient and Effective Use of Antibiotics in Dental Practice. Antibiotics (Basel) 2021; 10:550. [PMID: 34065113 PMCID: PMC8151289 DOI: 10.3390/antibiotics10050550] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 05/02/2021] [Accepted: 05/06/2021] [Indexed: 12/17/2022] Open
Abstract
The antimicrobial resistance (AMR) phenomenon is an emerging global problem and is induced by overuse and misuse of antibiotics in medical practice. In total, 10% of antibiotic prescriptions are from dentists, usually to manage oro-dental pains and avoid postsurgical complications. Recent research and clinical evaluations highlight new therapeutical approaches with a reduction in dosages and number of antibiotic prescriptions and recommend focusing on an accurate diagnosis and improvement of oral health before dental treatments and in patients' daily lives. In this article, the most common clinical and operative situations in dental practice, such as endodontics, management of acute alveolar abscesses, extractive oral surgery, parodontology and implantology, are recognized and summarized, suggesting possible guidelines to reduce antibiotic prescription and consumption, maintaining high success rates and low complications rates. Additionally, the categories of patients requiring antibiotic administration for pre-existing conditions are recapitulated. To reduce AMR threat, it is important to establish protocols for treatment with antibiotics, to be used only in specific situations. Recent reviews demonstrate that, in dentistry, it is possible to minimize the use of antibiotics, thoroughly assessing patient's conditions and type of intervention, thus improving their efficacy and reducing the adverse effects and enhancing the modern concept of personalized medicine.
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Affiliation(s)
- Alessio Buonavoglia
- Unit of Internal Medicine “Guido Baccelli”, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School, 70124 Bari, Italy; (A.B.); (P.L.); (A.G.S.); (R.F.); (E.M.); (M.P.); (A.V.)
| | - Patrizia Leone
- Unit of Internal Medicine “Guido Baccelli”, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School, 70124 Bari, Italy; (A.B.); (P.L.); (A.G.S.); (R.F.); (E.M.); (M.P.); (A.V.)
| | - Antonio Giovanni Solimando
- Unit of Internal Medicine “Guido Baccelli”, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School, 70124 Bari, Italy; (A.B.); (P.L.); (A.G.S.); (R.F.); (E.M.); (M.P.); (A.V.)
| | - Rossella Fasano
- Unit of Internal Medicine “Guido Baccelli”, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School, 70124 Bari, Italy; (A.B.); (P.L.); (A.G.S.); (R.F.); (E.M.); (M.P.); (A.V.)
| | - Eleonora Malerba
- Unit of Internal Medicine “Guido Baccelli”, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School, 70124 Bari, Italy; (A.B.); (P.L.); (A.G.S.); (R.F.); (E.M.); (M.P.); (A.V.)
| | - Marcella Prete
- Unit of Internal Medicine “Guido Baccelli”, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School, 70124 Bari, Italy; (A.B.); (P.L.); (A.G.S.); (R.F.); (E.M.); (M.P.); (A.V.)
| | | | - Carlo Prati
- Endodontic Clinical Section, Department of Biomedical and NeuroMotor Sciences, Dental School, University of Bologna, 40125 Bologna, Italy;
| | - Angelo Vacca
- Unit of Internal Medicine “Guido Baccelli”, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School, 70124 Bari, Italy; (A.B.); (P.L.); (A.G.S.); (R.F.); (E.M.); (M.P.); (A.V.)
| | - Vito Racanelli
- Unit of Internal Medicine “Guido Baccelli”, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School, 70124 Bari, Italy; (A.B.); (P.L.); (A.G.S.); (R.F.); (E.M.); (M.P.); (A.V.)
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Melo JGA, Sousa JP, Firmino RT, Matins CC, Granville-Garcia AF, Nonaka CFW, Costa EMMB. Different applications forms of green tea (Camellia sinensis (L.) Kuntze) for the treatment of periodontitis: a systematic review and meta-analysis. J Periodontal Res 2021; 56:443-453. [PMID: 33729563 DOI: 10.1111/jre.12871] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 01/21/2021] [Accepted: 02/19/2021] [Indexed: 01/22/2023]
Abstract
BACKGROUND Scaling and root planning (SRP) is the gold standard for non-surgical periodontal treatment. Green tea as a supporting alternative in non-surgical periodontal treatment has been suggested as a therapeutic option in the treatment of periodontitis. OBJECTIVE To analyse the comparative effectiveness of green tea (Camellia sinensis) in its different forms and applications for the treatment of periodontitis. METHODS We included randomized clinical trials evaluating green tea as an adjuvant therapeutic agent to scaling and root planning (SRP) in the treatment of periodontitis. For the meta-analysis, we calculated standardized mean difference (SMD) and 95%CI comparing green tea and control (only SRP). We subgrouped by types of application forms of green tea. The certainty of the evidence was assessed through GRADE. RESULTS Nine studies were included. The follow-up time of treatments varied from 21 days to 6 months. The subgroup meta-analysis showed that the green tea as sachet reduced probing bleeding (SMD = -0.71; 95%CI) and the gingival index (SMD = -0.78; 95%CI) compared to SRP with very low certainty of evidence. The sachet (SMD = -0.29; 95%CI) and dentifrice (SMD = -1.31; 95%CI) reduced plaque index with very low certainty compared to the control. All forms of application of green tea showed very low certainty of evidence (SMD = -0.27; 95% CI) in reducing the probing depth, as well as for the loss of clinical insertion (SMD = -0.42; 95% CI) with low certainty of evidence. CONCLUSION There was not a difference in the effectiveness of green tea isolated or in combination with SRP to reduce probing depth. Green tea adjunct to periodontal therapy showed very low certainty of effectiveness for the treatment of periodontal disease.
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Affiliation(s)
- Jéssica G A Melo
- Postgraduate Program in Dentistry, State University of Paraíba, Campina Grande, Brazil
| | - Jossaria P Sousa
- Department of Dentistry, State University of Paraíba, Campina Grande, Brazil
| | - Ramon T Firmino
- Postgraduate Program in Dentistry, Federal University of Minas Gerais, Belo Horizonte-MG, Brazil.,Faculty of Medical Sciences of Campina Grande, UNIFACISA University Centre, Campina Grande, Brazil
| | - Carolina C Matins
- Department of Pediatric Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | - Cassiano F W Nonaka
- Postgraduate Program in Dentistry, State University of Paraíba, Campina Grande, Brazil
| | - Edja M M B Costa
- Postgraduate Program in Dentistry, State University of Paraíba, Campina Grande, Brazil
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Exner M, Bhattacharya S, Gebel J, Goroncy-Bermes P, Hartemann P, Heeg P, Ilschner C, Kramer A, Ling ML, Merkens W, Oltmanns P, Pitten F, Rotter M, Schmithausen RM, Sonntag HG, Steinhauer K, Trautmann M. Chemical disinfection in healthcare settings: critical aspects for the development of global strategies. GMS HYGIENE AND INFECTION CONTROL 2020; 15:Doc36. [PMID: 33520601 PMCID: PMC7818848 DOI: 10.3205/dgkh000371] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Chemical disinfection is an indispensable means of preventing infection. This holds true for healthcare settings, but also for all other settings where transmission of pathogens poses a potential health risk to humans and/or animals. Research on how to ensure effectiveness of disinfectants and the process of disinfection, as well as on when, how and where to implement disinfection precautions is an ongoing challenge requiring an interdisciplinary team effort. The valuable resources of active substances used for disinfection must be used wisely and their interaction with the target organisms and the environment should be evaluated and monitored closely, if we are to reliable reap the benefits of disinfection in future generations. In view of the global threat of communicable diseases and emerging and re-emerging pathogens and multidrug-resistant pathogens, the relevance of chemical disinfection is continually increasing. Although this consensus paper pinpoints crucial aspects for strategies of chemical disinfection in terms of the properties of disinfectant agents and disinfection practices in a particularly vulnerable group and setting, i.e., patients in healthcare settings, it takes a comprehensive, holistic approach to do justice to the complexity of the topic of disinfection.
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Affiliation(s)
- Martin Exner
- Institute of Hygiene and Public Health, Bonn University, Bonn, Germany
| | | | - Jürgen Gebel
- Institute of Hygiene and Public Health, Bonn University, Bonn, Germany
| | | | - Philippe Hartemann
- Departement Environnement et Santé Publique S.E.R.E.S., Faculté de Médecine, Nancy, France
| | - Peter Heeg
- Institute of Medical Microbiology and Hygiene, University of Tübingen, Germany
| | - Carola Ilschner
- Institute of Hygiene and Public Health, Bonn University, Bonn, Germany
| | - Axel Kramer
- Institute of Hygiene and Environmental Medicine, University Medicine Greifswald, Germany
| | - Moi Lin Ling
- Infection Prevention & Control, Singapore General Hospital, Singapore
| | | | | | - Frank Pitten
- IKI – Institut für Krankenhaushygiene & Infektionskontrolle GmbH, Gießen, Germany
| | | | | | - Hans-Günther Sonntag
- Institute of Hygiene and Medical Microbiology, University of Heidelberg, Germany
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Hasegawa T, Takenaka S, Oda M, Domon H, Hiyoshi T, Sasagawa K, Ohsumi T, Hayashi N, Okamoto Y, Yamamoto H, Ohshima H, Terao Y, Noiri Y. Sulfated vizantin causes detachment of biofilms composed mainly of the genus Streptococcus without affecting bacterial growth and viability. BMC Microbiol 2020; 20:361. [PMID: 33238885 PMCID: PMC7687742 DOI: 10.1186/s12866-020-02033-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 11/03/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Sulfated vizantin, a recently developed immunostimulant, has also been found to exert antibiofilm properties. It acts not as a bactericide, but as a detachment-promoting agent by reducing the biofilm structural stability. This study aimed to investigate the mechanism underlying this activity and its species specificity using two distinct ex vivo oral biofilm models derived from human saliva. RESULTS The biofilm, composed mainly of the genus Streptococcus and containing 50 μM of sulfated vizantin, detached significantly from its basal surface with rotation at 500 rpm for only 15 s, even when 0.2% sucrose was supplied. Expression analyses for genes associated with biofilm formation and bacterial adhesion following identification of the Streptococcus species, revealed that a variety of Streptococcus species in a cariogenic biofilm showed downregulation of genes encoding glucosyltransferases involved in the biosynthesis of water-soluble glucan. The expression of some genes encoding surface proteins was also downregulated. Of the two quorum sensing systems involved in the genus Streptococcus, the expression of luxS in three species, Streptococcus oralis, Streptococcus gordonii, and Streptococcus mutans, was significantly downregulated in the presence of 50 μM sulfated vizantin. Biofilm detachment may be facilitated by the reduced structural stability due to these modulations. As a non-specific reaction, 50 μM sulfated vizantin decreased cell surface hydrophobicity by binding to the cell surface, resulting in reduced bacterial adherence. CONCLUSION Sulfated vizantin may be a candidate for a new antibiofilm strategy targeting the biofilm matrix while preserving the resident microflora.
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Affiliation(s)
- Taisuke Hasegawa
- Division of Cariology, Operative Dentistry and Endodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-5274, Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Shoji Takenaka
- Division of Cariology, Operative Dentistry and Endodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-5274, Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan.
| | - Masataka Oda
- Department of Microbiology and Infection Control Science, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Hisanori Domon
- Division of Microbiology and Infectious Diseases, Faculty of Dentistry & Graduate School of Medical and Dental sciences, Niigata University, Niigata, Japan
| | - Takumi Hiyoshi
- Division of Microbiology and Infectious Diseases, Faculty of Dentistry & Graduate School of Medical and Dental sciences, Niigata University, Niigata, Japan.,Division of Periodontology, Faculty of Dentistry & Graduate School of Medical and Dental sciences, Niigata University, Niigata, Japan
| | - Karin Sasagawa
- Division of Microbiology and Infectious Diseases, Faculty of Dentistry & Graduate School of Medical and Dental sciences, Niigata University, Niigata, Japan.,Division of Periodontology, Faculty of Dentistry & Graduate School of Medical and Dental sciences, Niigata University, Niigata, Japan
| | - Tatsuya Ohsumi
- Division of Cariology, Operative Dentistry and Endodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-5274, Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
| | - Naoki Hayashi
- Department of Microbiology and Infection Control Science, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Yasuko Okamoto
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, Japan
| | - Hirofumi Yamamoto
- Department of Chemistry and Functional Molecule, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Tokushima, Japan
| | - Hayato Ohshima
- Division of Anatomy and Cell Biology of Hard Tissue, Faculty of Dentistry & Graduate School of Medical and Dental sciences, Niigata University, Niigata, Japan
| | - Yutaka Terao
- Division of Microbiology and Infectious Diseases, Faculty of Dentistry & Graduate School of Medical and Dental sciences, Niigata University, Niigata, Japan
| | - Yuichiro Noiri
- Division of Cariology, Operative Dentistry and Endodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, 2-5274, Gakkocho-dori, Chuo-ku, Niigata, 951-8514, Japan
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Baena-Santillán ES, Piloni-Martini J, Santos-López EM, Gómez-Aldapa CA, Rangel-Vargas E, Castro-Rosas J. Comparison of the Antimicrobial Activity of Hibiscus sabdariffa Calyx Extracts, Six Commercial Types of Mouthwashes, and Chlorhexidine on Oral Pathogenic Bacteria, and the Effect of Hibiscus sabdariffa Extracts and Chlorhexidine on Permeability of the Bacterial Membrane. J Med Food 2020; 24:67-76. [PMID: 32326807 DOI: 10.1089/jmf.2019.0273] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
To determine and compare the antimicrobial effect of Hibiscus sabdariffa calyx extracts, six types of commercial mouthwashes, and chlorhexidine on Streptococcus mutans, Streptococcus sanguinis, Capnocytophaga gingivalis, and Staphylococcus aureus. Two varieties of H. sabdariffa cultivated in Mexico were used. Aqueous, methanolic, ethanolic, acetonic, and ethyl acetate extracts were obtained from H. sabdariffa calyces. Six different types of mouthwash (Astringosol®, Colgate plax-ice-infinity®, Crest pro-health®, Dental max®, Equate®, and Listerine zero®) and chlorhexidine (0.12%) were purchased at a pharmacy. The antimicrobial activity of the H. sabdariffa calyx extracts, mouthwashes, and chlorhexidine was determined by the agar disc diffusion technique. The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of all solutions were determined by the broth dilution method and the pour plate technique, respectively. Also, the effect of H. sabdariffa extracts and chlorhexidine on permeability of the bacterial membrane was determined by the violet crystal assay. All H. sabdariffa calyx extracts and chlorhexidine showed antibacterial activity against all oral pathogenic bacteria. The mouthwashes showed lower antibacterial effect than H. sabdariffa extracts and chlorhexidine. Dental max showed no antibacterial effect. The MICs and MBCs, respectively, for H. sabdariffa extracts were between 5-20 and 10-20 mg/mL; and for chlorhexidine, between 3-4 and 3-5 mg/mL. For the Listerine®, the MIC and MBC values were between 20-25 and 25-33 mg/mL, respectively. The results of the crystal violet test indicate that H. sabdariffa calyx extracts and chlorhexidine alter the permeability of the bacterial membrane. All H. sabdariffa extracts and chlorhexidine showed significantly greater antimicrobial effect than mouthwashes. This is the first report in which the antimicrobial effect of the H. sabdariffa calyx extracts, mouthwashes, and chlorhexidine is compared.
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Affiliation(s)
- Elena Saraí Baena-Santillán
- Academic Veterinary Area, Institute of Agricultural Sciences, Autonomous University of the Hidalgo State, Tulancingo, Hgo., Mexico
- Academic Area of Chemistry, Institute of Basic Sciences and Engineering, City of Knowledge, Autonomous University of the Hidalgo State, Mineral de la Reforma, Hgo., Mexico
| | - Javier Piloni-Martini
- Academic Veterinary Area, Institute of Agricultural Sciences, Autonomous University of the Hidalgo State, Tulancingo, Hgo., Mexico
| | - Eva María Santos-López
- Academic Area of Chemistry, Institute of Basic Sciences and Engineering, City of Knowledge, Autonomous University of the Hidalgo State, Mineral de la Reforma, Hgo., Mexico
| | - Carlos Alberto Gómez-Aldapa
- Academic Area of Chemistry, Institute of Basic Sciences and Engineering, City of Knowledge, Autonomous University of the Hidalgo State, Mineral de la Reforma, Hgo., Mexico
| | - Esmeralda Rangel-Vargas
- Academic Area of Chemistry, Institute of Basic Sciences and Engineering, City of Knowledge, Autonomous University of the Hidalgo State, Mineral de la Reforma, Hgo., Mexico
| | - Javier Castro-Rosas
- Academic Area of Chemistry, Institute of Basic Sciences and Engineering, City of Knowledge, Autonomous University of the Hidalgo State, Mineral de la Reforma, Hgo., Mexico
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Radakovic S, Andreoli N, Schmid S, Nietzsche S, Zumbrunn J, Sculean A, Eick S. Taurolidine Acts on Bacterial Virulence Factors and Does Not Induce Resistance in Periodontitis-Associated Bacteria-An In-Vitro Study. Antibiotics (Basel) 2020; 9:antibiotics9040166. [PMID: 32272629 PMCID: PMC7235838 DOI: 10.3390/antibiotics9040166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 04/04/2020] [Accepted: 04/05/2020] [Indexed: 11/16/2022] Open
Abstract
The aims of the present study were: (a) to determine the mechanism of action of taurolidine against bacterial species associated with periodontal disease, and (b) to evaluate the potential development of resistance against taurolidine as compared with minocycline. After visualizing the mode of action of taurolidine by transmission electron micrographs, the interaction with most important virulence factors (lipopolysaccharide (LPS), Porphyromonas gingivalis gingipains, Aggregatibacter actinomycetemcomitans leukotoxin), was analyzed. Then, 14 clinical isolates from subgingival biofilm samples were transferred on agar plates containing subinhibitory concentrations of taurolidine or minocycline up to 50 passages. Before and after each 10 passages, minimal inhibitory concentrations (MICs) were determined. Increasing MICs were screened for efflux mechanism. Taurolidine inhibited in a concentration-dependent manner the activities of LPS and of the arginine-specific gingipains; however, an effect on A. actinomycetemcomitans leukotoxin was not detected. One P. gingivalis strain developed a resistance against taurolidine, which was probably linked with efflux mechanisms. An increase of MIC values of minocycline occurred in five of the 14 included strains after exposure to subinhibitory concentrations of the antibiotic. The present results indicate that: (a) taurolidine interacts with LPS and gingipains, and (b) development of resistance seems to be a rare event when using taurolidine.
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Affiliation(s)
- Sabrina Radakovic
- Department of Periodontology, School of Dental Medicine, University of Bern, CH-3010 Bern, Switzerland; (S.R.); (N.A.); (S.S.); (A.S.)
| | - Nicola Andreoli
- Department of Periodontology, School of Dental Medicine, University of Bern, CH-3010 Bern, Switzerland; (S.R.); (N.A.); (S.S.); (A.S.)
| | - Simon Schmid
- Department of Periodontology, School of Dental Medicine, University of Bern, CH-3010 Bern, Switzerland; (S.R.); (N.A.); (S.S.); (A.S.)
| | - Sandor Nietzsche
- Center for Electron Microscopy, Jena University Hospital, D-07743 Jena, Germany;
| | - Jürg Zumbrunn
- Department of Clinical Affairs R& D, Geistlich Pharma Ag, CH-6110 Wolhusen, Switzerland;
| | - Anton Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, CH-3010 Bern, Switzerland; (S.R.); (N.A.); (S.S.); (A.S.)
| | - Sigrun Eick
- Department of Periodontology, School of Dental Medicine, University of Bern, CH-3010 Bern, Switzerland; (S.R.); (N.A.); (S.S.); (A.S.)
- Correspondence:
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Lim WG, Tong T, Chew J. Chryseobacterium indologenes and Chryseobacterium gleum interact and multiply intracellularly in Acanthamoeba castellanii. Exp Parasitol 2020; 211:107862. [PMID: 32087220 DOI: 10.1016/j.exppara.2020.107862] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 02/02/2020] [Accepted: 02/17/2020] [Indexed: 01/11/2023]
Abstract
Chryseobacterium indologenes and Chryseobacterium gleum are Gram negative environmental bacteria that have been frequently reported to implicate in fatal nosocomial infections, such as bacteraemia and ventilator-associated pneumonia in immunocompromised individuals in the past decades. The interaction between Chryseobacterium spp. and Acanthamoeba castellanii, a free-living amoeba ubiquitous in the environment, has not been explored previously. In this study, C. indologenes and C. gleum were co-cultured with A. castellanii trophozoites and their interactions were evaluated. Our results showed that when co-cultured with A. castellanii, bacterial numbers of C. indologenes and C. gleum increased significantly (p < 0.05), indicating growth-supporting role of A. castellanii. Specifically, our findings showed that C. indologenes and C. gleum were able to associate, invade and/or taken up by A. castellani trophozoites, and multiply intracellularly at similar rates (p > 0.05). Interestingly, the two Chryseobacterium spp. associated, invaded and/or taken up by A. castellanii at significantly higher rates than Escherichia coli K1, a neuropathogenic bacterial strain known to interact and replicate intracellularly in A. castellanii (p < 0.05). However, the ability of both Chryseobacterium spp. to multiply in A. castellanii was significantly weaker than E. coli K1 (p < 0.001). This is the first time that Chryseobacterium spp. and A. castellanii were shown to interact with each other. The ability to survive intracellularly in A. castellanii may confer protection to C. indologenes and C. gleum and assist in the survival and transmission of Chryseobacterium spp. to susceptible hosts within a hospital setting. Future studies will determine the ability of C. indologenes and C. gleum survival in A. castellanii cysts and the possible molecular mechanisms involved in such interactions.
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Affiliation(s)
- Wei-Gene Lim
- Department of Biological Sciences, Sunway University, Bandar Sunway, Selangor, 47500, Malaysia
| | - Tommy Tong
- Department of Biological Sciences, Sunway University, Bandar Sunway, Selangor, 47500, Malaysia
| | - Jactty Chew
- Department of Biological Sciences, Sunway University, Bandar Sunway, Selangor, 47500, Malaysia.
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The Capacity of Periodontal Gel to Occupy the Spaces Inside the Periodontal Pockets Using Computational Fluid Dynamic. Dent J (Basel) 2019; 8:dj8010001. [PMID: 31878278 PMCID: PMC7148525 DOI: 10.3390/dj8010001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/08/2019] [Accepted: 12/11/2019] [Indexed: 12/03/2022] Open
Abstract
The aim of the current work is to demonstrate the capacity of a new periodontal gel to occupy the spaces inside the periodontal pockets through Computational Fluid Dynamic (CFD). The test gel consists of two resorbable medical grade polymers (PEO, Poly Ethylen Oxide and HPMC, Hydroxy Propyl Metyl Cellulose), Type I Collagen, SAP (Vitamin C), and PBS (Saline Solution), while the control gel is 14% doxyclin controlled release gel, which is used for treating periodontal pockets with probing ≥5 mm after scaling and root plaining. The study examined the fluid dynamic analysis (Computational Fluid Dynamic—CFD) of two different gels, used in dentistry to treat periodontitis, in relation to both the geometry of the periodontal pocket and the function of two different types of needles that are used to distribute the preparation. The periodontal pocket was determined by reading DICOM images taken from the patient’s CAT scan. The results show that the H42® gel comes out uniformly compared to the other gel. Moreover, it is possible to observe how the rheological properties of the gel allow the fluid to spread evenly within the periodontal pocket in relation to the geometry of the needle. In particular, H42® gel exits in a constant way both from the first and the second exit. In fact, it was observed that by changing the geometry of the needle or the type of periodontal gel, the distribution of the gel inside the pocket was no longer homogeneous. Thus, having the correct rheological properties and correct needle geometries both speeds up the gel and optimizes the pressure distribution. Currently, the literature is still lacking, therefore further studies will be needed to confirm these results.
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Biswas D, Tiwari M, Tiwari V. Molecular mechanism of antimicrobial activity of chlorhexidine against carbapenem-resistant Acinetobacter baumannii. PLoS One 2019; 14:e0224107. [PMID: 31661500 PMCID: PMC6818764 DOI: 10.1371/journal.pone.0224107] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 10/04/2019] [Indexed: 02/07/2023] Open
Abstract
Acinetobacter baumannii causes hospital-acquired infections, especially in those with impaired immune function. Biocides or disinfectants are widely used antibacterial agents used to eradicate the effect of A. baumannii on inanimate objects and health care environments. In the current study, the antimicrobial activity of chlorhexidine has been investigated against carbapenem-resistant (RS-307, RS-7434, RS-6694, and RS-122), and sensitive (ATCC-19606 and RS-10953) strains of A. baumannii. We have determined growth kinetics, antimicrobial susceptibility, ROS production, lipid peroxidation, cell viability using flow cytometry assay (FACS), and membrane integrity by scanning electron microscope (SEM). The effect of chlorhexidine on the bacterial membrane has also been investigated using Fourier transform infrared (FTIR) spectroscopy. The present study showed that 32μg/ml chlorhexidine treatment results in the decreased bacterial growth, CFU count and cell viability. The antibacterial activity of chlorhexidine is due to the elevated ROS production and higher lipid peroxidation. These biochemical changes result in the membrane damage and alteration in the membrane proteins, phospholipids, carbohydrates, nucleic acids as evident from the FTIR and SEM data. Therefore, chlorhexidine has the potential to be used in the hospital setups to remove the spread of A. baumannii.
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Affiliation(s)
- Deepika Biswas
- Department of Biochemistry, Central University of Rajasthan, Ajmer, India
| | - Monalisa Tiwari
- Department of Biochemistry, Central University of Rajasthan, Ajmer, India
| | - Vishvanath Tiwari
- Department of Biochemistry, Central University of Rajasthan, Ajmer, India
- * E-mail: ,
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Ferreira-Fernandes H, Barros MAL, Souza Filho MD, Medeiros JVR, Vasconcelos DFP, Silva DA, Leódido ACM, Silva FRP, França LFC, Di Lenardo D, Yoshioka FKN, Rey JA, Burbano RR, Pinto GR. Topical application of cashew gum or chlorhexidine gel reduces overexpression of proinflammatory genes in experimental periodontitis. Int J Biol Macromol 2019; 128:934-940. [DOI: 10.1016/j.ijbiomac.2019.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 02/01/2019] [Accepted: 02/01/2019] [Indexed: 02/08/2023]
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Cieplik F, Jakubovics NS, Buchalla W, Maisch T, Hellwig E, Al-Ahmad A. Resistance Toward Chlorhexidine in Oral Bacteria - Is There Cause for Concern? Front Microbiol 2019; 10:587. [PMID: 30967854 PMCID: PMC6439480 DOI: 10.3389/fmicb.2019.00587] [Citation(s) in RCA: 195] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 03/07/2019] [Indexed: 12/20/2022] Open
Abstract
The threat of antibiotic resistance has attracted strong interest during the last two decades, thus stimulating stewardship programs and research on alternative antimicrobial therapies. Conversely, much less attention has been given to the directly related problem of resistance toward antiseptics and biocides. While bacterial resistances toward triclosan or quaternary ammonium compounds have been considered in this context, the bis-biguanide chlorhexidine (CHX) has been put into focus only very recently when its use was associated with emergence of stable resistance to the last-resort antibiotic colistin. The antimicrobial effect of CHX is based on damaging the bacterial cytoplasmic membrane and subsequent leakage of cytoplasmic material. Consequently, mechanisms conferring resistance toward CHX include multidrug efflux pumps and cell membrane changes. For instance, in staphylococci it has been shown that plasmid-borne qac ("quaternary ammonium compound") genes encode Qac efflux proteins that recognize cationic antiseptics as substrates. In Pseudomonas stutzeri, changes in the outer membrane protein and lipopolysaccharide profiles have been implicated in CHX resistance. However, little is known about the risk of resistance toward CHX in oral bacteria and potential mechanisms conferring this resistance or even cross-resistances toward antibiotics. Interestingly, there is also little awareness about the risk of CHX resistance in the dental community even though CHX has been widely used in dental practice as the gold-standard antiseptic for more than 40 years and is also included in a wide range of oral care consumer products. This review provides an overview of general resistance mechanisms toward CHX and the evidence for CHX resistance in oral bacteria. Furthermore, this work aims to raise awareness among the dental community about the risk of resistance toward CHX and accompanying cross-resistance to antibiotics. We propose new research directions related to the effects of CHX on bacteria in oral biofilms.
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Affiliation(s)
- Fabian Cieplik
- Department of Conservative Dentistry and Periodontology, University Medical Center Regensburg, Regensburg, Germany
| | - Nicholas S Jakubovics
- Centre for Oral Health Research, School of Dental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Wolfgang Buchalla
- Department of Conservative Dentistry and Periodontology, University Medical Center Regensburg, Regensburg, Germany
| | - Tim Maisch
- Department of Dermatology, University Medical Center Regensburg, Regensburg, Germany
| | - Elmar Hellwig
- Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
| | - Ali Al-Ahmad
- Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
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Cao X, Ye Q, Fan M, Liu C. Antimicrobial effects of the ginsenoside Rh2 on monospecies and multispecies cariogenic biofilms. J Appl Microbiol 2019; 126:740-751. [PMID: 30556937 DOI: 10.1111/jam.14178] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 11/01/2018] [Accepted: 12/12/2018] [Indexed: 02/06/2023]
Abstract
AIMS To investigate the effects of the ginsenoside Rh2 on monospecies and multispecies cariogenic biofilms and explore the mechanism of the antibiofilm effect of Rh2 in vitro. METHODS AND RESULTS Streptococcus mutans, Streptococcus sobrinus and Streptococcus sanguinis were chosen to form the monospecies or multispecies biofilms. Crystal violet staining and laser scanning confocal microscopy were used to observe the effect of Rh2 on biofilms in vitro. Cytotoxicity was examined by the Cell Counting Kit-8. The effects of Rh2 on bacterial membranes were observed via transmission electron microscopy (TEM). The isobaric tags for relative and absolute quantification (iTRAQ) method were used to profile the common differentially expressed proteins. Gene expression was analysed by reverse transcription quantitative polymerase chain reaction. In general, the treatment of cariogenic biofilms with Rh2 significantly decreased biomass accumulation by inhibiting bacterial growth and extracellular polysaccharide synthesis without any cytotoxic effects. TEM imaging showed that Rh2 could disrupt the cell membranes of these bacteria. The iTRAQ results indicated that the levels of mannose-specific IIC/D and acetaldehyde/alcohol dehydrogenase were substantially down-regulated, while the mRNA expression of the corresponding genes were significantly changed. CONCLUSIONS Our data revealed a potential application for Rh2 in the protection against dental caries via the inhibition of cariogenic biofilms. SIGNIFICANCE AND IMPACT OF THE STUDY This study describes the first application of a ginsenoside against multispecies cariogenic biofilms. Rh2 may serve as an alternative agent to prevent dental caries by effectively modulating the pathogenic potentials of oral biofilms.
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Affiliation(s)
- X Cao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Q Ye
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - M Fan
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - C Liu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
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Cai Z, Li Y, Wang Y, Chen S, Jiang S, Ge H, Lei L, Huang X. Disinfect
Porphyromonas gingivalis
Biofilm on Titanium Surface with Combined Application of Chlorhexidine and Antimicrobial Photodynamic Therapy. Photochem Photobiol 2018; 95:839-845. [PMID: 30481378 DOI: 10.1111/php.13060] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 11/23/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Zhiyu Cai
- Department of StomatologyFujian Medical University Union Hospital Fuzhou China
| | - Yijun Li
- School and Hospital of StomatologyFujian Medical University Fuzhou China
- Key Laboratory of StomatologyFujian Province University Fuzhou China
- Fujian Biological Materials Engineering and Technology Center of Stomatology Fuzhou China
| | - Yanhuang Wang
- School and Hospital of StomatologyFujian Medical University Fuzhou China
- Fujian Biological Materials Engineering and Technology Center of Stomatology Fuzhou China
| | - Shuai Chen
- School and Hospital of StomatologyFujian Medical University Fuzhou China
- Key Laboratory of StomatologyFujian Province University Fuzhou China
| | - Shan Jiang
- School and Hospital of StomatologyFujian Medical University Fuzhou China
- Fujian Biological Materials Engineering and Technology Center of Stomatology Fuzhou China
| | - Huan Ge
- School and Hospital of StomatologyFujian Medical University Fuzhou China
- Key Laboratory of StomatologyFujian Province University Fuzhou China
| | - Lishan Lei
- School and Hospital of StomatologyFujian Medical University Fuzhou China
- Fujian Biological Materials Engineering and Technology Center of Stomatology Fuzhou China
| | - Xiaojing Huang
- School and Hospital of StomatologyFujian Medical University Fuzhou China
- Key Laboratory of StomatologyFujian Province University Fuzhou China
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Vieira APM, Arias LS, de Souza Neto FN, Kubo AM, Lima BHR, de Camargo ER, Pessan JP, Delbem ACB, Monteiro DR. Antibiofilm effect of chlorhexidine-carrier nanosystem based on iron oxide magnetic nanoparticles and chitosan. Colloids Surf B Biointerfaces 2018; 174:224-231. [PMID: 30465997 DOI: 10.1016/j.colsurfb.2018.11.023] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 10/25/2018] [Accepted: 11/09/2018] [Indexed: 01/16/2023]
Abstract
This study synthesized and characterized a chlorhexidine (CHX)-carrier nanosystem based on iron oxide magnetic nanoparticles (IONPs) and chitosan (CS), and evaluated its antimicrobial effect on mono- and dual-species biofilms of Candida albicans and Streptococcus mutans. CHX was directly solubilized in CS-coated IONPs and maintained under magnetic stirring for obtaining the IONPs-CS-CHX nanosystem. Antimicrobial susceptibility testing for planktonic cells was performed by determining the minimum inhibitory concentration (MIC) of the nanosystem and controls. The effects of the IONPs-CS-CHX nanosystem on the formation of mono- and dual-species biofilms, as well as on pre-formed biofilms were assessed by quantification of total biomass, metabolic activity and colony-forming units. Data were analyzed by the Kruskal-Wallis' test or one-way analysis of variance, followed by the Student-Newman-Keuls' or Holm-Sidak's tests (α = 0.05), respectively. Physico-chemical results confirmed the formation of a nanosystem with a size smaller than 40 nm. The IONPs-CS-CHX nanosystem and free CHX showed similar MIC values for both species analyzed. In general, biofilm quantification assays revealed that the CHX nanosystem at 78 μg/mL promoted similar or superior antibiofilm effects compared to its counterpart at 39 μg/mL and free CHX at 78 μg/mL. These findings highlight the potential of CS-coated IONPs as preventive or therapeutic agents carrying CHX to fight biofilm-associated oral diseases.
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Affiliation(s)
- Ana Paula Miranda Vieira
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, 16015-050 Araçatuba, São Paulo, Brazil
| | - Laís Salomão Arias
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, 16015-050 Araçatuba, São Paulo, Brazil
| | - Francisco Nunes de Souza Neto
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, 16015-050 Araçatuba, São Paulo, Brazil
| | - Andressa Mayumi Kubo
- Federal University of São Carlos, Department of Chemistry, 13565-905 São Carlos, São Paulo, Brazil
| | | | | | - Juliano Pelim Pessan
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, 16015-050 Araçatuba, São Paulo, Brazil
| | - Alberto Carlos Botazzo Delbem
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, 16015-050 Araçatuba, São Paulo, Brazil
| | - Douglas Roberto Monteiro
- São Paulo State University (Unesp), School of Dentistry, Araçatuba, Department of Pediatric Dentistry and Public Health, 16015-050 Araçatuba, São Paulo, Brazil; Graduate Program in Dentistry (GPD - Master's Degree), University of Western São Paulo (UNOESTE), 19050-920 Presidente Prudente, São Paulo, Brazil.
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Comparison of the Vitek MS and Bruker Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry Systems for Identification of Chryseobacterium Isolates from Clinical Specimens and Report of Uncommon Chryseobacterium Infections in Humans. J Clin Microbiol 2018; 56:JCM.00712-18. [PMID: 30135228 DOI: 10.1128/jcm.00712-18] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Accepted: 08/09/2018] [Indexed: 02/07/2023] Open
Abstract
Matrix-assisted laser desorption ionization-time of flight mass spectrometry is becoming more popular and is replacing traditional identification methods in the clinical microbiology laboratory. We aimed to compare the Vitek mass spectrometry (MS) and Bruker Biotyper systems for the identification of Chryseobacterium isolated from clinical specimens and to report uncommon Chryseobacterium infections in humans. The microbial database from a hospital was searched for records between 2005 and 2016 to identify cultures that yielded Chryseobacterium Species identification by the Vitek MS and Bruker Biotyper systems was compared to identification by 16S rRNA gene sequencing. Over the study period, 140 Chryseobacterium isolates were included. Based on 16S rRNA gene sequencing, 78 isolates were C. indologenes, 39 were C. gleum, 12 were uncommon Chryseobacterium species (C. arthrosphaerae, C. culicis, C. cucumeris, C. bernardetii, C. artocarpi, and C. daecheongense), and the remaining 11 isolates were only identified at the genus level. The Vitek MS and Bruker Biotyper systems correctly identified 98.7% and 100% of C. indologenes isolates, respectively. While the Bruker Biotyper accurately identified 100% of C. gleum isolates, the Vitek MS system correctly identified only 2.6% of isolates from this species. None of the uncommon Chryseobacterium species were successfully identified by either of these two systems. The overall accuracies of Chryseobacterium identification at the species level by the Vitek MS and Bruker Biotyper systems were 60.5% and 90.7%, respectively. An upgrade and correction of the Vitek MS and Bruker Biotyper databases is recommended to correctly identify Chryseobacterium species.
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