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Paduch R, Matysik-Woźniak A, Jünemann AG, Rejdak R. Tea tree oil influence on human keratocytes growth and viability. Exp Eye Res 2024; 246:110013. [PMID: 39069001 DOI: 10.1016/j.exer.2024.110013] [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: 04/03/2024] [Revised: 07/24/2024] [Accepted: 07/25/2024] [Indexed: 07/30/2024]
Abstract
Tea tree oil (TTO) is used in ophthalmology to maintain healthy eyelid skin and to combat parasitic eyelid infections. Keratocytes belong to the structure of the corneal stoma and enable to maintain corneal homeostasis. TTO that reaches the surface of the eye in too high concentration may disturb the functions of these cells. The aim of the study was to test what concentration of TTO is safe for corneal keratocytes in vitro without causing a toxic effect. A normal human keratocytes (HK) cell line was used in the study. Morphology was visualized by light and fluorescence microscopy, cytometric analysis of the cell cycle and cytometric and spectrophotometric viability evaluation were performed. The level of nitric oxide was tested by Griess spectrophotometric method. TTO concentrations exceeding 0.01% significantly reduced cell viability. The IC50 values were on average 0.057%. Increasing TTO concentrations stimulated HK cells to release NOx. The observed values did not exceed 1 μM. The lowest TTO concentration increased the number of HK cells in the G1 phase of the cell cycle. Increasing TTO concentrations (≥0.1%) increased the number of cells in late apoptosis. TTO at concentrations ranging from 0.1% to 0.5% significantly changed cell morphology. Fluorescence analyzes confirmed that TTO at concentrations ≥0.1% induced apoptotic cell death. TTO exerts strong effect on ocular keratocytes depending on applied concentration. Concentrations exceeding 0.1% have a toxic effect on keratocytes, which die mainly by apoptosis. The ocular surface should be protected from excessive exposure to TTO, which may damage corneal stroma cells.
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Affiliation(s)
- Roman Paduch
- Department of Virology and Immunology, Institute Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, 20-033, Lublin, Poland; Department of General and Pediatric Ophthalmology, Medical University, Chmielna 1, 20-079, Lublin, Poland, Lublin, Poland.
| | - Anna Matysik-Woźniak
- Department of General and Pediatric Ophthalmology, Medical University, Chmielna 1, 20-079, Lublin, Poland, Lublin, Poland
| | - Anselm G Jünemann
- Department of Ophthalmology, Rostock University Medical Center, Rostock, Germany
| | - Robert Rejdak
- Department of General and Pediatric Ophthalmology, Medical University, Chmielna 1, 20-079, Lublin, Poland, Lublin, Poland
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Yang S, Meng X, Zhen Y, Baima Q, Wang Y, Jiang X, Xu Z. Strategies and mechanisms targeting Enterococcus faecalis biofilms associated with endodontic infections: a comprehensive review. Front Cell Infect Microbiol 2024; 14:1433313. [PMID: 39091674 PMCID: PMC11291369 DOI: 10.3389/fcimb.2024.1433313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Accepted: 07/05/2024] [Indexed: 08/04/2024] Open
Abstract
Enterococcus faecalis is one of the main microorganisms that infects root canals, ranking among the most prevalent microorganisms associated with endodontic treatment failure. Given its pervasive presence in persistent endodontic infections, the successful elimination of Enterococcus faecalis is crucial for effective endodontic treatment and retreatment. Furthermore, Enterococcus faecalis can form biofilms - defense structures that microbes use to fight environmental threats. These biofilms confer resistance against host immune system attacks and antibiotic interventions. Consequently, the presence of biofilms poses a significant challenge in the complete eradication of Enterococcus faecalis and its associated disease. In response, numerous scholars have discovered promising outcomes in addressing Enterococcus faecalis biofilms within root canals and undertaken endeavors to explore more efficacious approaches in combating these biofilms. This study provides a comprehensive review of strategies and mechanisms for the removal of Enterococcus faecalis biofilms.
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Affiliation(s)
- Shipeng Yang
- Department of Endodontics, Hospital of Stomatology, Jilin University, Changchun, China
| | - Xiuping Meng
- Department of Endodontics, Hospital of Stomatology, Jilin University, Changchun, China
| | - Yuqi Zhen
- Department of Endodontics, Hospital of Stomatology, Jilin University, Changchun, China
| | - Quzhen Baima
- Department of Endodontics, Hospital of Stomatology, Jilin University, Changchun, China
| | - Yu Wang
- Department of Dental Implantology, Hospital of Stomatology, Jilin University, Changchun, China
| | - Xinmiao Jiang
- Department of Endodontics, Hospital of Stomatology, Jilin University, Changchun, China
| | - Zhibo Xu
- Department of Endodontics, Hospital of Stomatology, Jilin University, Changchun, China
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Mohammed AE, Aldahasi RM, Rahman I, Shami A, Alotaibi M, BinShabaib MS, ALHarthi SS, Aabed K. The antimicrobial activity of tea tree oil ( Melaleuca alternifolia) and its metal nanoparticles in oral bacteria. PeerJ 2024; 12:e17241. [PMID: 38854801 PMCID: PMC11162611 DOI: 10.7717/peerj.17241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 03/25/2024] [Indexed: 06/11/2024] Open
Abstract
Tea tree (Melaleuca alternifolia) oil (TTO) is an antimicrobial agent, and hence, its use in fabricating nanoparticles (NP) may be useful in providing more efficacious antimicrobial agents. The current research aimed to test the antimicrobial efficacy of TTO and its TTO-Metal-NPs against oral microbes: Porphyromonas gingivalis, Enterococcus faecalis, and Streptococcus mutans. The antimicrobial activity of TTO and zinc (Zn) and iron (Fe) nanoparticles (NPs) and the combined effects of antimicrobial agents were investigated using agar well diffusion assays. Fourier-transform infrared spectroscopy (FT-IR) was used to identify the phyto-constituents of TTO. Field emission scanning electron microscopy (FE-SEM), dynamic light scatter (DLS), and zeta potential were utilized to analyze the biogenic nanoparticles' morphology, size, and potential. The antimicrobial mode of action was determined by assessing the morphological changes under scanning electron microscopy (SEM). The TTO extracts converted Zn and Fe ions to NPs, having an average size of 97.50 (ZnNPs) and 102.4 nm (FeNPs). All tested agents had significant antibacterial efficacy against the tested oral microbes. However, the TTO extract was more efficacious than the NPs. Combination treatment of TTO with antibiotics resulted in partial additive effects against P. gingivalis and partial antagonistic effects against E. faecalis, S. mutans, and common mouthwashes (Oral B and chlorhexidine). TTO and NP-treated bacteria underwent morphological changes on treatment. M. alternifolia phytochemicals could be useful for further research and development of antimicrobial NPs. The current study highlights the variance in activity observed for different types of bacteria and antagonistic effects seen with common mouthwashes, which represent a threat to therapeutic efficacy and heighten the risk of clinical microbial resistance.
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Affiliation(s)
- Afrah E. Mohammed
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Reham M. Aldahasi
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Ishrat Rahman
- Department of Basic Dental Sciences, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Ashwag Shami
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Modhi Alotaibi
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Munerah S. BinShabaib
- Department of Preventive Dental Sciences, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Shatha S. ALHarthi
- Department of Preventive Dental Sciences, College of Dentistry, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Kawther Aabed
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
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4
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Wang J, Ju T, Guo L, Shan W, Wu Q, Zhang H, Zhang J. Quorum-quenching enzyme Est816 assisted antibiotics against periodontitis induced by Aggregatibacter actinomycetemcomitans in rats. Front Cell Infect Microbiol 2024; 14:1368684. [PMID: 38779565 PMCID: PMC11109752 DOI: 10.3389/fcimb.2024.1368684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/24/2024] [Indexed: 05/25/2024] Open
Abstract
Introduction Quorum-quenching enzyme Est816 hydrolyzes the lactone rings of N-acyl homoserine lactones, effectively blocking the biofilm formation and development of Gram-negative bacteria. However, its applications in the oral field is limited. This study aimed to evaluate the efficacy of enzyme Est816 in combination with antibiotics against periodontitis induced by Aggregatibacter actinomycetemcomitans in vitro and in vivo. Methods The antimicrobial efficacy of enzyme Est816 in combination with minocycline, metronidazole, and amoxicillin was determined using the minimum inhibitory concentration test. The anti-biofilm effect of enzyme Est816 was assessed using scanning electron microscopy, live/dead bacterial staining, crystal violet staining, and real-time quantitative PCR. Biocompatibility of enzyme Est816 was assessed in human gingival fibroblasts (HGF) by staining. A rat model of periodontitis was established to evaluate the effect of enzyme Est816 combined with minocycline using micro-computed tomography and histological staining. Results Compared to minocycline, metronidazole, and amoxicillin treatment alone, simultaneous treatment with enzyme Est816 increased the sensitivity of biofilm bacteria to antibiotics. Enzyme Est816 with minocycline exhibited the highest rate of biofilm clearance and high biocompatibility. Moreover, the combination of enzyme Est816 with antibiotics improved the antibiofilm effects of the antibiotics synergistically, reducing the expression of the virulence factor leukotoxin gene (ltxA) and fimbria-associated gene (rcpA). Likewise, the combination of enzyme Est816 with minocycline exhibited a remarkable inhibitory effect on bone resorption and inflammation damage in a rat model of periodontitis. Discussion The combination of enzyme Est816 with antibiotics represents a prospective anti-biofilm strategy with the potential to treat periodontitis.
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Affiliation(s)
- Junmin Wang
- Stomatological Hospital and College, Key Lab. of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui, China
| | - Tianjuan Ju
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Clinical Research Center for Oral Diseases, Department of Pediatric Dentistry, School of Stomatology, The Fourth Military Medical University, XI''an, Shaanxi, China
| | - Lifeng Guo
- Stomatological Hospital and College, Key Lab. of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui, China
| | - Wenwen Shan
- Stomatological Hospital and College, Key Lab. of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui, China
| | - Qianxia Wu
- Stomatological Hospital and College, Key Lab. of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui, China
| | - Haichuan Zhang
- Stomatological Hospital and College, Key Lab. of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui, China
| | - Jing Zhang
- Stomatological Hospital and College, Key Lab. of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui, China
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Si H, Yan W, Jun S, Hongyu M, Xia Z, Kuan W, Cunchao Z. Modulation of cecal microbiota and fecal metabolism in mice by walnut protein. Food Funct 2024; 15:1689-1704. [PMID: 38251959 DOI: 10.1039/d3fo04403c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Walnut meal is a by-product of walnut oil pressing, in which the protein content is more than 40%, which is an excellent food raw material, but at present, it is basically used as animal feed or discarded, which results in a great waste of resources, and its modulating effect on the intestinal microbiota is not clear. In this study, we used supercritically extracted walnut meal as a raw material, prepared walnut meal isolate protein (WP) by alkaline extraction and acid precipitation, and systematically analyzed its structure by Fourier infrared spectroscopy (FTIR), Raman spectroscopy (Raman), and scanning electron microscopy (SEM); meanwhile, we explored the effects of WP on the cecal bacterial flora and fecal metabolites of mice by microbiological and metabolomic techniques. The results showed that the protein content of WP prepared using alkaline extraction and acid precipitation was as high as 83.7%, in which arginine and glutamic acid were abundant, and it has the potential to be used as a raw material for weight-loss meal replacement food; FTIR and Raman analyses showed that the absorption peaks of WP's characteristic functional groups were obvious, and that the content of the α-helix and β-fold in the secondary structure was greater than 30%, which indicated that it was structurally stable; differential scanning calorimetry (DSC) and SEM analyses showed that WP is a typical spherical particle, its denaturation temperature is 73.6 °C, and it has good thermal stability. Supplementation of WP significantly altered the composition of the intestinal flora in mice, with an increase in beneficial bacteria and a decrease in harmful bacteria; the strongest modulation of the intestinal flora was achieved by altering the composition of the intestinal flora and by increasing the number of Akkermansia (p < 0.01), which consequently affects the function of the microbiota. Based on LC-MS metabolomic results, we identified a total of 87 WP-regulated metabolites, mainly enriched in the bile secretion pathway, which had the highest relevance, followed by benzoxazine biosynthesis. In summary, walnut protein is an important plant protein and has a positive impact on intestinal health, which may provide new ideas for the development of functional foods.
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Affiliation(s)
- Huang Si
- Yunnan Agricultural University, China.
| | - Wang Yan
- Yunnan Agricultural University, China.
| | - Sheng Jun
- Yunnan Agricultural University, China.
- Yunnan Province Characteristic Resources Food Biofabrication Engineering Research Center, China.
| | - Mu Hongyu
- Yunnan Agricultural University, China.
| | - Zhang Xia
- Yunnan Agricultural University, China.
| | - Wu Kuan
- Yunnan Agricultural University, China.
| | - Zhao Cunchao
- Yunnan Agricultural University, China.
- Yunnan Plateau Characteristic Agricultural Industry Research Institute, China.
- Yunnan Province Characteristic Resources Food Biofabrication Engineering Research Center, China.
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Fu C, Xu Y, Zheng H, Ling X, Zheng C, Tian L, Gu X, Cai J, Yang J, Li Y, Wang P, Liu Y, Lou Y, Zheng M. In vitro antibiofilm and bacteriostatic activity of diacerein against Enterococcus faecalis. AMB Express 2023; 13:85. [PMID: 37573278 PMCID: PMC10423188 DOI: 10.1186/s13568-023-01594-z] [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: 07/29/2023] [Accepted: 08/04/2023] [Indexed: 08/14/2023] Open
Abstract
Enterococcus faecalis is one of the main pathogens that causes hospital-acquired infections because it is intrinsically resistant to some antibiotics and often is capable of biofilm formation, which plays a critical role in resisting the external environment. Therefore, attacking biofilms is a potential therapeutic strategy for infections caused by E. faecalis. Current research indicates that diacerein used in the treatment of osteoarthritis showed antimicrobial activity on strains of gram-positive cocci in vitro. In this study, we tested the MICs of diacerein using the broth microdilution method, and successive susceptibility testing verified that E. faecalis is unlikely to develop resistance to diacerein. In addition, we obtained a strain of E. faecalis HE01 with strong biofilm-forming ability from an eye hospital environment and demonstrated that diacerein affected the biofilm development of HE01 in a dose-dependent manner. Then, we explored the mechanism by which diacerein inhibits biofilm formation through qRT-PCR, extracellular protein assays, hydrophobicity assays and transcriptomic analysis. The results showed that biofilm formation was inhibited at the initial adhesion stage by inhibition of the expression of the esp gene, synthesis of bacterial surface proteins and reduction in cell hydrophobicity. In addition, transcriptome analysis showed that diacerein not only inhibited bacterial growth by affecting the oxidative phosphorylation process and substance transport but also inhibited biofilm formation by affecting secondary metabolism, biosynthesis, the ribosome pathway and luxS expression. Thus, our findings provide compelling evidence for the substantial therapeutic potential of diacerein against E. faecalis biofilms.
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Affiliation(s)
- Chunyan Fu
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Yuxi Xu
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Hao Zheng
- Wenzhou Key Laboratory of Sanitary Microbiology, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xinyi Ling
- Wenzhou Key Laboratory of Sanitary Microbiology, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Chengzhi Zheng
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Leihao Tian
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Xiaobin Gu
- Wenzhou Key Laboratory of Sanitary Microbiology, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Jiabei Cai
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Jing Yang
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Yuanyuan Li
- Wenzhou Key Laboratory of Sanitary Microbiology, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Peiyu Wang
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Yuan Liu
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Yongliang Lou
- Wenzhou Key Laboratory of Sanitary Microbiology, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Meiqin Zheng
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China.
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China.
- Wenzhou Key Laboratory of Sanitary Microbiology, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China.
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Nascimento T, Gomes D, Simões R, da Graça Miguel M. Tea Tree Oil: Properties and the Therapeutic Approach to Acne-A Review. Antioxidants (Basel) 2023; 12:1264. [PMID: 37371994 DOI: 10.3390/antiox12061264] [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: 05/04/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Acne vulgaris is an inflammatory dermatological pathology that affects mostly young people. However, it can also appear in adulthood, mainly in women. It has a high psychosocial impact, not only at the time of active lesions but also due to the consequences of lesions such as scarring and hyperpigmentation. Several factors are involved in the physiopathology of acne and the constant search for active ingredients is a reality, namely phytotherapeutic ingredients. Tea tree oil is an essential oil extracted from Melaleuca alternifolia (Maiden & Betch) Cheel with known antibacterial, anti-inflammatory, and antioxidant properties, making it a candidate for the treatment of acne. This review aims to describe the various properties of tea tree oil that make it a possible ingredient to use in the treatment of acne and to present several human studies that have evaluated the efficacy and safety of using tea tree oil in the treatment of acne. It can be concluded that tea tree oil has good antibacterial, anti-inflammatory, and antioxidant properties that result in a decrease in the number of inflammatory lesions, mainly papules, and pustules. However, given the diversity of study designs, it is not possible to draw concrete conclusions on the efficacy and safety of this oil in the treatment of acne.
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Affiliation(s)
- Tânia Nascimento
- Escola Superior de Saúde, Universidade do Algarve (ESSUAlg), Campus de Gambelas, Edifício 2, 8005-139 Faro, Portugal
- Algarve Biomedical Center Research Institute (ABC-RI), Universidade do Algarve, Campus de Gambelas, Edifício 2, 8005-139 Faro, Portugal
| | - Diana Gomes
- Faculdade de Ciências e Tecnologia, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Ricardo Simões
- Faculdade de Ciências e Tecnologia, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - Maria da Graça Miguel
- Faculdade de Ciências e Tecnologia, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
- Mediterranean Institute for Agriculture, Environment and Development, Mediterranean Institute for Agriculture, Environment and Development, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
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Marinković J, Nikolić B, Marković T, Petrović B, Pašalić S, Lal M, Marković D. Essential oils as adjuvants in endodontic therapy: myth or reality? Future Microbiol 2022; 17:1487-1499. [DOI: 10.2217/fmb-2022-0115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
To enhance endodontics, the search for new antibacterials that can improve infected tooth root canal treatment is ongoing. As potent antibacterial and antibiofilm agents, essential oils (EOs) have been suggested as novel endodontic materials. Several studies indicate that EO-based irrigants and medicaments show promising reductive potential against the most important intracanal pathogen, Enterococcus faecalis, and notably contribute to intracanal biofilm eradication. In terms of additional benefits that EO-based endodontic materials can provide, their antioxidant and anti-inflammatory potential are also important, but they have only scarcely been explored in research. Investigations into the benefits of EO-based endodontic materials together with their biocompatibility are needed. The results presented in this review strongly encourage further research on this topic.
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Affiliation(s)
- Jelena Marinković
- University of Belgrade,‘VINČA’ Institute of Nuclear Sciences, National Institute of thе Republic of Serbia, Mike Petrovića Alasa 12, 11000, Belgrade, Serbia
| | - Biljana Nikolić
- University of Belgrade, Student Square 16, 11000, Belgrade, Serbia
| | - Tatjana Marković
- Institute for Medicinal Plant Research ‘Dr Josif Pančić’, Tadeuša Košćuška 1, 11000, Belgrade, Serbia
| | - Božana Petrović
- University of Belgrade,‘VINČA’ Institute of Nuclear Sciences, National Institute of thе Republic of Serbia, Mike Petrovića Alasa 12, 11000, Belgrade, Serbia
| | - Snežana Pašalić
- University of Belgrade,‘VINČA’ Institute of Nuclear Sciences, National Institute of thе Republic of Serbia, Mike Petrovića Alasa 12, 11000, Belgrade, Serbia
| | - Mohan Lal
- Agrotechnology, Technology & Rural Development Division, CSIR-North East Institute of Science & Technology, Jorhat, 785006, Assam, India
| | - Dejan Marković
- University of Belgrade, School of Dental Medicine, Dr Subotića 8, 11000, Belgrade, Serbia
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9
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Yu H, Bian C, Cheng H, Mei J, Xie J. The antimicrobial effect of
Melissa officinalis
L. essential oil to
Shewanella putrefaciens
: Insights based on the cell membrane and biofilm. J Food Saf 2022. [DOI: 10.1111/jfs.13011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Huijie Yu
- College of Food Science & Technology Shanghai Ocean University Shanghai China
- Shanghai Engineering Research Center of Aquatic Product Processing & Preservation Shanghai Ocean University Shanghai China
- National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University Shanghai China
| | - Chuhan Bian
- College of Food Science & Technology Shanghai Ocean University Shanghai China
- Shanghai Engineering Research Center of Aquatic Product Processing & Preservation Shanghai Ocean University Shanghai China
- National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University Shanghai China
| | - Hao Cheng
- College of Food Science & Technology Shanghai Ocean University Shanghai China
- Shanghai Engineering Research Center of Aquatic Product Processing & Preservation Shanghai Ocean University Shanghai China
- National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University Shanghai China
| | - Jun Mei
- College of Food Science & Technology Shanghai Ocean University Shanghai China
- Shanghai Engineering Research Center of Aquatic Product Processing & Preservation Shanghai Ocean University Shanghai China
- National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University Shanghai China
- Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation Shanghai Ocean University Shanghai China
| | - Jing Xie
- College of Food Science & Technology Shanghai Ocean University Shanghai China
- Shanghai Engineering Research Center of Aquatic Product Processing & Preservation Shanghai Ocean University Shanghai China
- National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean University Shanghai China
- Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation Shanghai Ocean University Shanghai China
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10
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Jin M, He J, Li J, Hu Y, Sun D, Gu H. Edwardsiella piscicida YccA: A novel virulence factor essential to membrane integrity, mobility, host infection, and host immune response. FISH & SHELLFISH IMMUNOLOGY 2022; 126:318-326. [PMID: 35654386 DOI: 10.1016/j.fsi.2022.05.049] [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: 09/30/2021] [Revised: 05/16/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
YccA is a hydrophobic protein with seven transmembrane domains. The function of YccA is largely unknown in pathogenic bacteria. Edwardsiella piscicide (formerly known as E. tarda) is an aquatic pathogen that can infect various economically important fish, including flounder (Paralichthys olivaceus) and tilapia (Oreochromis niloticus). In this study, we investigated the role of YccA in E. piscicida by the construction of a mar kerless yccA in-frame mutant strain, TX01ΔyccA. We found that (i) in comparison to the wild type TX01, TX01ΔyccA exhibited markedly compromised tolerance to high temperature and tobramycin; (ii) deletion of yccA significantly impaired the integrity of the cell membrane and retarded bacterial biofilm formation and mobility; (iii) deficiency of yccA reduced bacterial adhesion and invasion of fish cells and immune tissues, while the introduction of a trans-expressed yccA gene restored the lost virulence of TX01ΔyccA; and (iv) host immune responses induced by TX01 and TX01ΔyccA were different in terms of reactive oxygen species (ROS) levels and expression levels of cytokines. Taken together, the results of our study indicate that YccA is a novel virulence factor of E. piscicida, and YccA is essential for bacterial pathogenicity through evasion of the host's innate immune functions.
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Affiliation(s)
- Mengru Jin
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing, 163319, China; Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, CATAS, Haikou, 571101, China
| | - Jiaojiao He
- Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, CATAS, Haikou, 571101, China; School of Life Sciences, Hainan University, Haikou, 570228, China
| | - Jun Li
- School of Science and Medicine, Lake Superior State University, Sault Ste. Marie, Michigan, 49783, USA
| | - Yonghua Hu
- Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, CATAS, Haikou, 571101, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology, Qingdao, 266071, China; Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Haikou, 571101, China
| | - Dongmei Sun
- College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing, 163319, China.
| | - Hanjie Gu
- Institute of Tropical Bioscience and Biotechnology, Hainan Academy of Tropical Agricultural Resource, CATAS, Haikou, 571101, China; Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Haikou, 571101, China.
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11
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Zong B, Li X, Xu Q, Wang D, Gao P, Zhou Q. Enhanced Eradication of Enterococcus faecalis Biofilms by Quaternized Chitosan-Coated Upconversion Nanoparticles for Photodynamic Therapy in Persistent Endodontic Infections. Front Microbiol 2022; 13:909492. [PMID: 35711785 PMCID: PMC9195144 DOI: 10.3389/fmicb.2022.909492] [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: 03/31/2022] [Accepted: 04/25/2022] [Indexed: 11/13/2022] Open
Abstract
Due to the persistent presence of Enterococcus faecalis biofilms in apical root canals, persistent endodontic infections (PEIs) have always been an intractable disease to solve. The conventional root canal disinfectants (e.g., calcium hydroxide, chlorhexidine) are arduous to scavenge the stubborn infection. With the progress of nanomedicine in the biomedical field, antimicrobial photodynamic therapy (aPDT) is emerging as a prospective anti-infective therapy for PEIs. Herein, quaternized chitosan (QCh) modified upconversion nanoparticles (UCNP)@SiO2/methylene blue (MB) are developed with enhanced antibacterial/biofilm performance for aPDT in PEIs. QCh is coated on the UCNP@SiO2/MB by testing the changes in diameter, chemical functional group, and charge. Interestingly, QCh also increases the conversion efficiency of UCNP to generate more reactive oxygen species (ROS). Furthermore, the prepared UCNP@SiO2/MB@QCh exhibits highly effective antibacterial activity against free E. faecalis and related biofilm in vitro and extracted teeth. Importantly, the additional QCh with positive charges enhance UCNP@SiO2/MB@QCh contact with E. faecalis (negative charges) through electrostatic interaction. Then, UCNP@SiO2/MB@QCh could stick close to the E. faecalis and generate ROS under the irradiation by a 980 nm laser. The in vitro cellular test shows that UCNP@SiO2/MB@QCh has acceptable cytocompatibility. Thus, UCNP@SiO2/MB@QCh could offer a novel strategy for the potential aPDT clinical applications in the treatment of PEIs.
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Affiliation(s)
- Bin Zong
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China
| | - Xue Li
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China
| | - Quanchen Xu
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China
| | - Danyang Wang
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China.,Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Pengyu Gao
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China
| | - Qihui Zhou
- Department of Stomatology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China.,Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
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12
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Luo K, Zhao P, He Y, Kang S, Shen C, Wang S, Guo M, Wang L, Shi C. Antibacterial Effect of Oregano Essential Oil against Vibrio vulnificus and Its Mechanism. Foods 2022; 11:403. [PMID: 35159553 PMCID: PMC8834123 DOI: 10.3390/foods11030403] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/17/2022] [Accepted: 01/23/2022] [Indexed: 02/06/2023] Open
Abstract
Oregano essential oil (OEO) is an effective natural antibacterial agent, but its antibacterial activity against Vibrio vulnificus has not been widely studied. The aim of this study was to investigate the inhibitory effect and germicidal activity of OEO on V. vulnificus and its possible inhibition mechanism. The minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of OEO against four V. vulnificus strains (ATCC 27562 and three isolates from seafoods) were from 0.06 to 0.15 μL/mL. Compared with untreated bacteria, OEO reduced the concentration of intracellular adenosine triphosphate (ATP), hyperpolarized the cell membrane, increased the level of reactive oxygen species (ROS), and increased the concentration of intracellular malondialdehyde (MDA), but there was no obvious DNA damage at the OEO test concentration. It was indicated that OEO inactivated V. vulnificus by generating ROS which caused lipid peroxidation of cell membranes, thereby reducing the permeability and integrity of cell membranes and causing morphological changes to cells, but there was no obvious damage to DNA. In addition, OEO could effectively kill V. vulnificus in oysters at 25 °C, and the number of bacteria decreased by 48.2% after 0.09% OEO treatment for 10 h. The good inhibitory effect and bactericidal activity of OEO showed in this study, and the economy and security of OEO make it possible to apply OEO to control V. vulnificus contamination in oysters and other seafoods.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Chao Shi
- College of Food Science and Engineering, Northwest A&F University, 20 Xinong Road, Yangling, Xianyang 712100, China; (K.L.); (P.Z.); (Y.H.); (S.K.); (C.S.); (S.W.); (M.G.); (L.W.)
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