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Khan S, Ahmad B, Rehman A, Khan I, Ahmad A. Evaluating the efficacy of low-energy shock waves in treating uropathogenic E. coli. Int Urol Nephrol 2024:10.1007/s11255-024-04195-2. [PMID: 39225764 DOI: 10.1007/s11255-024-04195-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2024] [Accepted: 08/27/2024] [Indexed: 09/04/2024]
Affiliation(s)
- Saad Khan
- Saidu Medical College, Khyber Medical University, Saidu Sharif, Pakistan
| | - Bilal Ahmad
- Saidu Medical College, Khyber Medical University, Saidu Sharif, Pakistan.
| | - Abdur Rehman
- Saidu Medical College, Khyber Medical University, Saidu Sharif, Pakistan
| | - Iftikhar Khan
- FMH College of Medicine and Dentistry, Lahore, Pakistan
| | - Aftab Ahmad
- Saidu Medical College, Khyber Medical University, Saidu Sharif, Pakistan
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Chandra K, Nair AV, Chatterjee R, Muralidhara P, Singh A, Kamanna S, Tatu US, Chakravortty D. Absence of proline-peptide transporter YjiY in Salmonella Typhimurium leads to secretion of factors which inhibits intra-species biofilm formation. Microbiol Res 2023; 273:127411. [PMID: 37285689 DOI: 10.1016/j.micres.2023.127411] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 05/12/2023] [Accepted: 05/14/2023] [Indexed: 06/09/2023]
Abstract
Salmonella is a genus of widely spread Gram negative, facultative anaerobic bacteria, which is known to cause ¼th of diarrheal morbidity and mortality globally. It causes typhoid fever and gastroenteritis by gaining access to the host gut through contaminated food and water. Salmonella utilizes its biofilm lifestyle to strongly resist antibiotics and persist in the host. Although biofilm removal or dispersal has been studied widely, the inhibition of the initiation of Salmonella Typhimurium (STM WT) biofilm remains elusive. This study demonstrates the anti-biofilm property of the cell-free supernatant obtained from a carbon-starvation induced proline peptide transporter mutant (STM ΔyjiY) strain. The STM ΔyjiY culture supernatant primarily inhibits biofilm initiation by regulating biofilm-associated transcriptional network that is reversed upon complementation (STM ΔyjiY:yjiY). We demonstrate that abundance of FlgM correlates with the absence of flagella in the STM ΔyjiY supernatant treated WT cells. NusG works synergistically with the global transcriptional regulator H-NS. Relatively low abundances of flavoredoxin, glutaredoxin, and thiol peroxidase might lead to accumulation of ROS within the biofilm, and subsequent toxicity in STM ΔyjiY supernatant. This work further suggests that targeting these oxidative stress relieving proteins might be a good choice to reduce Salmonella biofilm.
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Affiliation(s)
- Kasturi Chandra
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Abhilash Vijay Nair
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Ritika Chatterjee
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Prerana Muralidhara
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Anmol Singh
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Sathisha Kamanna
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Utpal S Tatu
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Dipshikha Chakravortty
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India; Adjunct Faculty, School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, India.
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Wang T, Cornel EJ, Li C, Du J. Drug delivery approaches for enhanced antibiofilm therapy. J Control Release 2023; 353:350-365. [PMID: 36473605 DOI: 10.1016/j.jconrel.2022.12.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/06/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022]
Abstract
Biofilms have attracted increasing attention in recent years. Many bacterial infections are associated with biofilm formation. A bacterial biofilm is an aggregated membrane-like substance that is composed of a large number of bacteria and their secreted extracellular polymeric substances. The traditional antibiofilm approaches, such as chemotherapy based on antibiotics, are often ineffective in eradicating biofilms owing to the limited diffusion ability of antibiotics within biofilms and inactivation of antibiotics by biofilms. Moreover, a larger dosage of antibiotics could be effective, but leads to an increased tolerance. Smart drug delivery systems that deliver antibiotics into the biofilm interior is a promising strategy to meet this challenge. In this review, we focus on the methods to improve drug delivery efficiency for enhanced chemotherapy of biofilms. Furthermore, we have summarized chemical approaches for enhanced drug delivery, such as chemical shields, charge reversal, and dual corona enhanced delivery strategies; these methods focus on physicochemical biofilm properties and specific biofilm features. Afterwards, physical approaches are discussed, such as magnetism-mediated drug delivery, electricity-mediated drug delivery, ultrasound-mediated drug delivery, and shock wave-mediated drug delivery. Finally, a perspective on the development of next-generation antibiofilm drug delivery systems is given.
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Affiliation(s)
- Tao Wang
- Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Erik Jan Cornel
- Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China
| | - Chang Li
- Department of Orthopedics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China.
| | - Jianzhong Du
- Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China; Department of Orthopedics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China.
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Translational Applications of Extracorporeal Shock Waves in Dental Medicine: A Literature Review. Biomedicines 2022; 10:biomedicines10040902. [PMID: 35453651 PMCID: PMC9030023 DOI: 10.3390/biomedicines10040902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/04/2022] [Accepted: 04/12/2022] [Indexed: 12/04/2022] Open
Abstract
Extracorporeal shock wave therapy (ESWT) has been studied and applied extensively in medical practice for various applications including musculoskeletal, dermal, vascular, and cardiac indications. These indications have emerged from primary ESWT use in treating urolithiasis and cholelithiasis. Likewise, dental medicine has had its share of utilizing ESWT in various investigations. This review aimed to provide an up-to-date summary of ESWT use in preclinical and clinical dental medicine. There is growing interest in ESWT use stemming from its non-invasiveness, low cost, and safe qualities in addition to its proven regenerative biostimulating aspects. Targeted tissue and parameters of ESWT delivery continue to be an integral part of successful ESWT treatment to attain the clinical value of the anticipated dose’s effect.
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Li Y, Wang S, Xiao Y, Liu B, Pang J. Nerve growth factor enhances the therapeutic effect of mesenchymal stem cells on diabetic periodontitis. Exp Ther Med 2021; 22:1013. [PMID: 34373699 DOI: 10.3892/etm.2021.10445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 12/10/2020] [Indexed: 11/05/2022] Open
Abstract
Patients with diabetes frequently suffer from periodontitis, which progresses rapidly and is difficult to cure. Mesenchymal stem cell (MSC) transplantation may effectively treat periodontitis, but high glucose limits its therapeutic effect in diabetes. Nerve growth factor (NGF) has the functions of cell protection, anti-apoptosis and immune regulation, and may have potential application in diabetic periodontitis. In the present study, flow cytometry indicated that NGF inhibited MSC apoptosis induced by high glucose. Of note, high glucose promoted the transformation of MSCs into the proinflammatory type. NGF inhibited this transformation of MSCs under diabetic conditions and further decreased the proportion of T cells and monocytes/macrophages among lymphocytes. An animal model of diabetic periodontitis was constructed and MSC transplantation was demonstrated to reduce alveolar bone loss caused by diabetes. NGF enhanced the therapeutic effect of MSCs and maintained transplanted MSC survival in periodontal tissue of diabetic mice. Immunohistochemical analysis of periodontal tissues suggested that in the NGF group, infiltration of T cells and macrophages was reduced. Neurotrophic receptor tyrosine kinase 1 was indicated to have a key role in these effects of NGF. In conclusion, NGF may enhance the therapeutic effect of MSCs on diabetic periodontitis by protecting the cells and promoting the transformation of MSCs into the immunosuppressive type.
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Affiliation(s)
- Ying Li
- Department of Stomatology, Air Force Medical Center, People's Liberation Army, Beijing 100142, P.R. China
| | - Suyu Wang
- Department of Stomatology, Air Force Medical Center, People's Liberation Army, Beijing 100142, P.R. China
| | - Yihan Xiao
- Department of Stomatology, Air Force Medical Center, People's Liberation Army, Beijing 100142, P.R. China
| | - Bing Liu
- Department of Stomatology, Air Force Medical Center, People's Liberation Army, Beijing 100142, P.R. China
| | - Jianliang Pang
- Department of Stomatology, Air Force Medical Center, People's Liberation Army, Beijing 100142, P.R. China
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Sánchez MC, Alonso-Español A, Ribeiro-Vidal H, Alonso B, Herrera D, Sanz M. Relevance of Biofilm Models in Periodontal Research: From Static to Dynamic Systems. Microorganisms 2021; 9:428. [PMID: 33669562 PMCID: PMC7922797 DOI: 10.3390/microorganisms9020428] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/10/2021] [Accepted: 02/18/2021] [Indexed: 12/25/2022] Open
Abstract
Microbial biofilm modeling has improved in sophistication and scope, although only a limited number of standardized protocols are available. This review presents an example of a biofilm model, along with its evolution and application in studying periodontal and peri-implant diseases. In 2011, the ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) research group at the University Complutense of Madrid developed an in vitro biofilm static model using representative bacteria from the subgingival microbiota, demonstrating a pattern of bacterial colonization and maturation similar to in vivo subgingival biofilms. When the model and its methodology were standardized, the ETEP research group employed the validated in vitro biofilm model for testing in different applications. The evolution of this model is described in this manuscript, from the mere observation of biofilm growth and maturation on static models on hydroxyapatite or titanium discs, to the evaluation of the impact of dental implant surface composition and micro-structure using the dynamic biofilm model. This evolution was based on reproducing the ideal microenvironmental conditions for bacterial growth within a bioreactor and reaching the target surfaces using the fluid dynamics mimicking the salivary flow. The development of this relevant biofilm model has become a powerful tool to study the essential processes that regulate the formation and maturation of these important microbial communities, as well as their behavior when exposed to different antimicrobial compounds.
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Affiliation(s)
- María Carmen Sánchez
- ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) Research Group, University Complutense of Madrid, 28040 Madrid, Spain; (M.C.S.); (A.A.-E.); (H.R.-V.); (B.A.); (D.H.)
- Medicine Department, Faculty of Medicine, University Complutense of Madrid, 28040 Madrid, Spain
| | - Andrea Alonso-Español
- ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) Research Group, University Complutense of Madrid, 28040 Madrid, Spain; (M.C.S.); (A.A.-E.); (H.R.-V.); (B.A.); (D.H.)
| | - Honorato Ribeiro-Vidal
- ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) Research Group, University Complutense of Madrid, 28040 Madrid, Spain; (M.C.S.); (A.A.-E.); (H.R.-V.); (B.A.); (D.H.)
| | - Bettina Alonso
- ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) Research Group, University Complutense of Madrid, 28040 Madrid, Spain; (M.C.S.); (A.A.-E.); (H.R.-V.); (B.A.); (D.H.)
| | - David Herrera
- ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) Research Group, University Complutense of Madrid, 28040 Madrid, Spain; (M.C.S.); (A.A.-E.); (H.R.-V.); (B.A.); (D.H.)
| | - Mariano Sanz
- ETEP (Etiology and Therapy of Periodontal and Peri-Implant Diseases) Research Group, University Complutense of Madrid, 28040 Madrid, Spain; (M.C.S.); (A.A.-E.); (H.R.-V.); (B.A.); (D.H.)
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Milstrey A, Rosslenbroich S, Everding J, Raschke MJ, Richards RG, Moriarty TF, Puetzler J. Antibiofilm efficacy of focused high-energy extracorporeal shockwaves and antibiotics in vitro. Bone Joint Res 2021; 10:77-84. [PMID: 33474969 PMCID: PMC7845461 DOI: 10.1302/2046-3758.101.bjr-2020-0219.r1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Aims Biofilm formation is one of the primary reasons for the difficulty in treating implant-related infections (IRIs). Focused high-energy extracorporeal shockwave therapy (fhESWT), which is a treatment modality for fracture nonunions, has been shown to have a direct antibacterial effect on planktonic bacteria. The goal of the present study was to investigate the effect of fhESWT on Staphylococcus aureus biofilms in vitro in the presence and absence of antibiotic agents. Methods S. aureus biofilms were grown on titanium discs (13 mm × 4 mm) in a bioreactor for 48 hours. Shockwaves were applied with either 250, 500, or 1,000 impulses onto the discs surrounded by either phosphate-buffered saline or antibiotic (rifampin alone or in combination with nafcillin). The number of viable bacteria was determined by quantitative culture after sonication. Representative samples were taken for scanning electron microscopy. Results The application of fhESWT led to a ten-fold reduction in bacterial counts on the metal discs for all impulse numbers compared to the control (p < 0.001). Increasing the number of impulses did not further reduce bacterial counts in the absence of antibiotics (all p > 0.289). Antibiotics alone reduced the number of bacteria on the discs; however, the combined application of the fhESWT and antibiotic administration further reduced the bacterial count compared to the antibiotic treatment only (p = 0.032). Conclusion The use of fhESWT significantly reduced the colony-forming unit (CFU) count of a S. aureus biofilm in our model independently, and in combination with antibiotics. Therefore, the supplementary application of fhESWT could be a helpful tool in the treatment of IFIs in certain cases, including infected nonunions. Cite this article: Bone Joint Res 2021;10(1):77–84.
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Affiliation(s)
- Alexander Milstrey
- AO Research Institute Davos, Davos, Switzerland.,Department of Trauma, Hand and Reconstructive Surgery, University Hospital Muenster, Muenster, Germany
| | - Steffen Rosslenbroich
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Muenster, Muenster, Germany
| | - Jens Everding
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Muenster, Muenster, Germany
| | - Michael J Raschke
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Muenster, Muenster, Germany
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Li D, Feng Y, Tang H, Huang L, Tong Z, Hu C, Chen X, Tan J. A Simplified and Effective Method for Generation of Experimental Murine Periodontitis Model. Front Bioeng Biotechnol 2020; 8:444. [PMID: 32523937 PMCID: PMC7261919 DOI: 10.3389/fbioe.2020.00444] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 04/17/2020] [Indexed: 12/12/2022] Open
Abstract
Periodontitis, a common disease that can lead to bone destruction, periodontal attachment loss, and tooth loss, is the major cause for oral tissue engineering. Experimental periodontitis is a suitable disease-model for studying bone regeneration and the potential therapeutic role of biomaterials on periodontal tissue engineering, as this in vivo model could be employed to mimic the natural host response under bacteria-caused oral pathological environments. Although large animals with ligature-induced periodontitis have mostly been used for experiments, a mouse model is a better choice for several reasons. Inserting ligature threads through the interproximal space between the teeth is the key step in establishing a periodontitis model, and it is easy to achieve in large animals, but difficult in mice due to the limited operating space. In this work, we provide a new and proven approach for periodontitis induction in mice using C+ nickel-titanium root canal files and stainless-steel ligature wires. The validity of this method was assessed by evaluating alveolar bone loss via micro-CT and detecting periodontal inflammation by histological staining and qPCR after the treatments. Progressive alveolar bone loss was observed from day 3 after the ligature-placement. Infiltration and accumulation of F4/80+ macrophage was also detected. In accordance with the histological results, there was upregulation of the expression levels of the inflammatory genes Il1β, Tnf-α, and Il6 in gingival tissues isolated from the ligation sites. Our results suggest that this novel method could resolve the difficulty of ligature-placement in mice and consequently contribute to further use of mouse models for studying the pathological mechanisms of periodontitis and developing potential periodontal tissue regeneration strategies. C+ files, which are made of nickel-titanium, are tough, elastic, and sufficiently thin to pass through the interproximal space between the teeth after pre-bending to form an appropriate angle, thus providing an access for ligature wire insertion. As a common tool in the dental clinic, it is familiar to researchers of oral biology, and can provide the feasibility for wide application of our method.
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Affiliation(s)
- Danfeng Li
- Department of Orthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Yi Feng
- Department of Orthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Hang Tang
- Department of Orthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Lijia Huang
- Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Zhongchun Tong
- Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Cheng Hu
- Department of Orthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Xiaodan Chen
- Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Jiali Tan
- Department of Orthodontics, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, China
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