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Song Y, Mehl F, Zeichner SL. Vaccine Strategies to Elicit Mucosal Immunity. Vaccines (Basel) 2024; 12:191. [PMID: 38400174 PMCID: PMC10892965 DOI: 10.3390/vaccines12020191] [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: 12/01/2023] [Revised: 01/29/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024] Open
Abstract
Vaccines are essential tools to prevent infection and control transmission of infectious diseases that threaten public health. Most infectious agents enter their hosts across mucosal surfaces, which make up key first lines of host defense against pathogens. Mucosal immune responses play critical roles in host immune defense to provide durable and better recall responses. Substantial attention has been focused on developing effective mucosal vaccines to elicit robust localized and systemic immune responses by administration via mucosal routes. Mucosal vaccines that elicit effective immune responses yield protection superior to parenterally delivered vaccines. Beyond their valuable immunogenicity, mucosal vaccines can be less expensive and easier to administer without a need for injection materials and more highly trained personnel. However, developing effective mucosal vaccines faces many challenges, and much effort has been directed at their development. In this article, we review the history of mucosal vaccine development and present an overview of mucosal compartment biology and the roles that mucosal immunity plays in defending against infection, knowledge that has helped inform mucosal vaccine development. We explore new progress in mucosal vaccine design and optimization and novel approaches created to improve the efficacy and safety of mucosal vaccines.
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Affiliation(s)
- Yufeng Song
- Department of Pediatrics, University of Virginia, Charlottesville, VA 22908, USA; (Y.S.)
| | - Frances Mehl
- Department of Pediatrics, University of Virginia, Charlottesville, VA 22908, USA; (Y.S.)
| | - Steven L. Zeichner
- Department of Pediatrics, University of Virginia, Charlottesville, VA 22908, USA; (Y.S.)
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA
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Fan W, You B, Wang X, Zheng X, Xu A, Liu Y, Peng H, Yin W, Xu M, Dong X, Liu Y, Zhao P, Liang X. Safety and efficacy of lentinan nasal drops in patients infected with the variant of COVID-19: a randomized, placebo-controlled trial. Front Pharmacol 2023; 14:1292479. [PMID: 38108068 PMCID: PMC10722177 DOI: 10.3389/fphar.2023.1292479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 11/22/2023] [Indexed: 12/19/2023] Open
Abstract
Objective: Lentinan has antiviral, anti-tumor, immunomodulatory, stimulating interferon production, and other pharmacological effects. Previous animal experiments have shown that lentinan nasal drops can assist [Corona Virus Disease 2019) COVID-19] vaccine to induce high levels of neutralizing antibodies and can effectively resist the invasion of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This study aimed to evaluate the safety and efficacy of lentinan nasal drops in patients infected with Omicron (SARS-CoV-2 variant) through a dose-escalation study and a placebo-controlled trial. Methods: A randomized, placebo-controlled trial. The study was divided into two phases: Phase I: a dose escalation trial in which 24 COVID-19 patients were enrolled, that is, 12 in the escalation dose group (50, 75, and 100 µg/day) and 12 in the standard treatment group. The aim was to evaluate the safety and tolerance of lentinan nasal drops. The second stage was a placebo-controlled study. The optimal dose group of the first stage was used as the therapeutic dose, and the sample size was expanded to verify the anti-COVID-19 efficacy of lentinan nasal drops. Results: In the dose-increasing study, lentinan nasal drops showed good safety, and no serious adverse reactions occurred. The virus shedding time of the 100 µg dose group was significantly shorter than that in the control group (7.75 ± 1.71 VS 13.41 ± 3.8 days) (p = 0.01), and the 100 µg/day lentinan nasal drops were tolerated well. The results of the placebo-controlled study showed that compared with that in the placebo group, the time for COVID-19 antigen to turn negative was significantly shorter in the 100 µg lentinan nasal drop group (p = 0.0298), but no significant difference was observed in symptom improvement between the two groups. In the placebo-controlled study, two patients experienced mild nasal discomfort with nasal drops, but the symptoms relieved themselves. Conclusion: Lentinan nasal drops are tolerated well and can shorten the time of virus clearance.
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Affiliation(s)
- Wenhan Fan
- Department of Infection Diseases, First Affiliated Hospital of Navy Military Medical University, Shanghai, China
| | - Benming You
- Department of Pharmacy, First Affiliated Hospital of Navy Military Medical University, Shanghai, China
| | - Xinyu Wang
- Department of Infection Diseases, First Affiliated Hospital of Navy Military Medical University, Shanghai, China
| | - Xu Zheng
- Department of Microbiology, PLA Key Laboratory of Biodetection and Biodefense, Shanghai Key Laboratory of Medical Biodefense, Navy Military Medical University, Shanghai, China
| | - Aijing Xu
- Department of Infection Diseases, First Affiliated Hospital of Navy Military Medical University, Shanghai, China
| | - Yangang Liu
- Department of Microbiology, PLA Key Laboratory of Biodetection and Biodefense, Shanghai Key Laboratory of Medical Biodefense, Navy Military Medical University, Shanghai, China
| | - Haoran Peng
- Department of Microbiology, PLA Key Laboratory of Biodetection and Biodefense, Shanghai Key Laboratory of Medical Biodefense, Navy Military Medical University, Shanghai, China
| | - Wei Yin
- Department of Infection Diseases, First Affiliated Hospital of Navy Military Medical University, Shanghai, China
| | - Mingxiao Xu
- Department of Infection Diseases, First Affiliated Hospital of Navy Military Medical University, Shanghai, China
| | - Xu Dong
- Department of Infection Diseases, First Affiliated Hospital of Navy Military Medical University, Shanghai, China
| | - Yayun Liu
- Department of Infection Diseases, First Affiliated Hospital of Navy Military Medical University, Shanghai, China
| | - Ping Zhao
- Department of Microbiology, PLA Key Laboratory of Biodetection and Biodefense, Shanghai Key Laboratory of Medical Biodefense, Navy Military Medical University, Shanghai, China
| | - Xuesong Liang
- Department of Infection Diseases, First Affiliated Hospital of Navy Military Medical University, Shanghai, China
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Johnstone KF, Wei Y, Bittner-Eddy PD, Vreeman GW, Stone IA, Clayton JB, Reilly CS, Walbon TB, Wright EN, Hoops SL, Boyle WS, Costalonga M, Herzberg MC. Calprotectin (S100A8/A9) Is an Innate Immune Effector in Experimental Periodontitis. Infect Immun 2021; 89:e0012221. [PMID: 34097505 PMCID: PMC8445179 DOI: 10.1128/iai.00122-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 05/12/2021] [Indexed: 01/26/2023] Open
Abstract
Upregulated in inflammation, calprotectin (complexed S100A8 and S100A9; S100A8/A9) functions as an innate immune effector molecule, promoting inflammation, and also as an antimicrobial protein. We hypothesized that antimicrobial S100A8/A9 would mitigate change to the local microbial community and promote resistance to experimental periodontitis in vivo. To test this hypothesis, S100A9-/- and wild-type (WT; S100A9+/+) C57BL/6 mice were compared using a model of ligature-induced periodontitis. On day 2, WT mice showed fewer infiltrating innate immune cells than S100A9-/- mice; by day 5, the immune cell numbers were similar. At 5 days post ligature placement, oral microbial communities sampled with swabs differed significantly in beta diversity between the mouse genotypes. Ligatures recovered from molar teeth of S100A9-/- and WT mice contained significantly dissimilar microbial genera from each other and the overall oral communities from swabs. Concomitantly, the S100A9-/- mice had significantly greater alveolar bone loss than WT mice around molar teeth in ligated sites. When the oral microflora was ablated by antibiotic pretreatment, differences disappeared between WT and S100A9-/- mice in their immune cell infiltrates and alveolar bone loss. Calprotectin, therefore, suppresses emergence of a dysbiotic, proinflammatory oral microbial community, which reduces innate immune effector activity, including early recruitment of innate immune cells, mitigating subsequent alveolar bone loss and protecting against experimental periodontitis.
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Affiliation(s)
- Karen F. Johnstone
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Yuping Wei
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Peter D. Bittner-Eddy
- Department of Developmental and Surgical Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Gerrit W. Vreeman
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Ian A. Stone
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Jonathan B. Clayton
- BioTechnology Institute, Computer Science and Engineering, University of Minnesota, Saint Paul, Minnesota, USA
| | - Cavan S. Reilly
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - Travis B. Walbon
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Elisa N. Wright
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Susan L. Hoops
- BioTechnology Institute, Computer Science and Engineering, University of Minnesota, Saint Paul, Minnesota, USA
| | - William S. Boyle
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Massimo Costalonga
- Department of Developmental and Surgical Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Mark C. Herzberg
- Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
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Abstract
Epithelia are structurally integral elements in the fabric of oral mucosa with significant functional roles. Similarly, the gingival epithelium performs uniquely critical tasks in responding to a variety of external stimuli and dangers through the regulation of specific built-in molecular mechanisms in a context-dependent fashion at cellular levels. Gingival epithelial cells form an anatomic architecture that confers defense, robustness, and adaptation toward external aggressions, most critically to colonizing microorganisms, among other functions. Accordingly, recent studies unraveled previously uncharacterized response mechanisms in gingival epithelial cells that are constructed to rapidly exert biocidal effects against invader pathobiotic bacteria, such as Porphyromonas gingivalis, through small danger molecule signaling. The host-adapted bacteria, however, have developed adroit strategies to 1) exploit the epithelia as privileged growth niches and 2) chronically target cellular bactericidal and homeostatic metabolic pathways for successful bacterial persistence. As the overgrowth of colonizing microorganisms in the gingival mucosa can shift from homeostasis to dysbiosis or a diseased state, it is crucial to understand how the innate modulatory molecules are intricately involved in antibacterial pathways and how they shape susceptibility versus resistance in the epithelium toward pathogens. Thus, in this review, we highlight recent discoveries in gingival epithelial cell research in the context of bacterial colonizers. The current knowledge outlined here demonstrates the ability of epithelial cells to possess highly organized defense machineries, which can jointly regulate host-derived danger molecule signaling and integrate specific global responses against opportunistic bacteria to combat microbial incursion and maintain host homeostatic balance. These novel examples collectively suggest that the oral epithelia are equipped with a dynamically robust and interconnected defense system encompassing sensors and various effector molecules that arrange and achieve a fine-tuned and advanced response to diverse bacteria.
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Affiliation(s)
- J.S. Lee
- Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Ö. Yilmaz
- Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, SC, USA
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
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Velickovic M, Arsenijevic A, Acovic A, Arsenijevic D, Milovanovic J, Dimitrijevic J, Todorovic Z, Milovanovic M, Kanjevac T, Arsenijevic N. Galectin-3, Possible Role in Pathogenesis of Periodontal Diseases and Potential Therapeutic Target. Front Pharmacol 2021; 12:638258. [PMID: 33815121 PMCID: PMC8017193 DOI: 10.3389/fphar.2021.638258] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 02/11/2021] [Indexed: 12/11/2022] Open
Abstract
Periodontal diseases are chronic inflammatory diseases that occur due to the imbalance between microbial communities in the oral cavity and the immune response of the host that lead to destruction of tooth supporting structures and finally to alveolar bone loss. Galectin-3 is a β-galactoside-binding lectin with important roles in numerous biological processes. By direct binding to microbes and modulation of their clearence, Galectin-3 can affect the composition of microbial community in the oral cavity. Galectin-3 also modulates the function of many immune cells in the gingiva and gingival sulcus and thus can affect immune homeostasis. Few clinical studies demonstrated increased expression of Galectin-3 in different forms of periodontal diseases. Therefore, the objective of this mini review is to discuss the possible effects of Galectin-3 on the process of immune homeostasis and the balance between oral microbial community and host response and to provide insights into the potential therapeutic targeting of Gal-3 in periodontal disease.
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Affiliation(s)
- Milica Velickovic
- Department of Dentistry, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Aleksandar Arsenijevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Aleksandar Acovic
- Department of Dentistry, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Dragana Arsenijevic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Jelena Milovanovic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.,Department of Histology and Embriology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Jelena Dimitrijevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Zeljko Todorovic
- Department of Internal Medicine, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Marija Milovanovic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Tatjana Kanjevac
- Department of Dentistry, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Nebojsa Arsenijevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
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Lukova OA, Zaslavskaya MI, Makhrova TV, Kropotov VS, Kitaeva EV. Expression of toll-like and adhesive receptors on epithelial cells of the oral mucosa in periodontitis. Klin Lab Diagn 2021; 65:645-648. [PMID: 33245655 DOI: 10.18821/0869-2084-2020-65-10-645-648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The expression of toll-like and adhesive receptors on epithelial cells of the oral mucosa changes in different pathological conditions, both local and systemic levels, in particular, in chronic periodontitis. The long-term presence of periodontal pathogenic microorganisms in the gingival furrow stimulates and supports the inflammatory process. The interaction of periodontal pathogens with epithelial cells of the oral mucosa is the first stage of the development of periodontitis. The pathological process affects the function of epithelial cells, in particular their ability to interact with representatives of microbiocenosis. Therefore, the natural colonization of normal oral microbiota on buccal epitheliocytes, reflecting the ability of epithelial cells to microbial adhesion, is a sensitive indicator of various destabilizing processes. Determining the level of expression of toll-like TLR2 and TLR4 receptors on epithelial cells also allows us to assess the functional state of cells and the severity of the inflammatory process at the level of the oral mucosa, in particular, in chronic periodontitis. In this paper, we studied the receptor-dependent reactions of buccal epithelial cells in chronic periodontitis using flow cytofluorometry and by determining the level of natural (microbial) colonization. The authors also compared these methods for determining the functional state of mucosal cells in chronic periodontitis. The results showed that in patients with periodontitis, the activity of receptors involved in adhesive reactions with the oral microbiota changed slightly and was little higher than in healthy donors. At the same time, the expression of TLRs on epithelial cells in periodontitis changed significantly. Thus, the percentage of cells expressing TLR2 significantly increased, while TLR4 decreased. Concurrently, the percentage of mucosal cells that do not have TLRs increased significantly in oral pathology. Thus, the study of TLR2 - and TLR4-expression on buccal epithelial cells is a more representative test in assessing the severity of the inflammatory process in chronic periodontitis than determining the level of natural colonization.
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Affiliation(s)
- O A Lukova
- Federal State Budgetary Educational Institution of Higher Education «Privolzhsky Research Medical University» of the Ministry of Health of the Russian
| | - M I Zaslavskaya
- Federal State Budgetary Educational Institution of Higher Education «Privolzhsky Research Medical University» of the Ministry of Health of the Russian
| | - T V Makhrova
- Federal State Budgetary Educational Institution of Higher Education «Privolzhsky Research Medical University» of the Ministry of Health of the Russian
| | - V S Kropotov
- Federal State Budgetary Educational Institution of Higher Education «Privolzhsky Research Medical University» of the Ministry of Health of the Russian
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Emerging Role of Mucosal Vaccine in Preventing Infection with Avian Influenza A Viruses. Viruses 2020; 12:v12080862. [PMID: 32784697 PMCID: PMC7472103 DOI: 10.3390/v12080862] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/05/2020] [Accepted: 08/05/2020] [Indexed: 12/13/2022] Open
Abstract
Avian influenza A viruses (AIVs), as a zoonotic agent, dramatically impacts public health and the poultry industry. Although low pathogenic avian influenza virus (LPAIV) incidence and mortality are relatively low, the infected hosts can act as a virus carrier and provide a resource pool for reassortant influenza viruses. At present, vaccination is the most effective way to eradicate AIVs from commercial poultry. The inactivated vaccines can only stimulate humoral immunity, rather than cellular and mucosal immune responses, while failing to effectively inhibit the replication and spread of AIVs in the flock. In recent years, significant progresses have been made in the understanding of the mechanisms underlying the vaccine antigen activities at the mucosal surfaces and the development of safe and efficacious mucosal vaccines that mimic the natural infection route and cut off the AIVs infection route. Here, we discussed the current status and advancement on mucosal immunity, the means of establishing mucosal immunity, and finally a perspective for design of AIVs mucosal vaccines. Hopefully, this review will help to not only understand and predict AIVs infection characteristics in birds but also extrapolate them for distinction or applicability in mammals, including humans.
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Li T, Long C, Fanning KV, Zou C. Studying Effects of Cigarette Smoke on Pseudomonas Infection in Lung Epithelial Cells. J Vis Exp 2020. [PMID: 32449738 DOI: 10.3791/61163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Cigarette smoking is the major etiological cause for lung emphysema and chronic obstructive pulmonary disease (COPD). Cigarette smoking also promotes susceptibility to bacterial infections in the respiratory system. However, the effects of cigarette smoking on bacterial infections in human lung epithelial cells have yet to be thoroughly studied. Described here is a detailed protocol for the preparation of cigarette smoking extracts (CSE), treatment of human lung epithelial cells with CSE, and bacterial infection and infection determination. CSE was prepared with a conventional method. Lung epithelial cells were treated with 4% CSE for 3 h. CSE-treated cells were, then, infected with Pseudomonas at a multiplicity of infection (MOI) of 10. Bacterial loads of the cells were determined by three different methods. The results showed that CSE increased Pseudomonas load in lung epithelial cells. This protocol, therefore, provides a simple and reproducible approach to study the effect of cigarette smoke on bacterial infections in lung epithelial cells.
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Affiliation(s)
- Tiao Li
- Acute Lung Injury Center of Excellence, Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine
| | - Chen Long
- Acute Lung Injury Center of Excellence, Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine
| | - Kristen V Fanning
- Acute Lung Injury Center of Excellence, Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine
| | - Chunbin Zou
- Acute Lung Injury Center of Excellence, Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine;
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Haraszthy VI, Raylae CC, Sreenivasan PK. Antimicrobial effects of a stannous fluoride toothpaste in distinct oral microenvironments. J Am Dent Assoc 2019; 150:S14-S24. [PMID: 30797255 DOI: 10.1016/j.adaj.2019.01.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/02/2019] [Accepted: 01/05/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Clinical research has shown a relationship between microbial accumulations and oral diseases such as gingivitis and caries. The mouth harbors large densities of bacteria in distinct oral microenvironments, that is, dental plaque on teeth, saliva, and soft tissues such as the tongue, cheek, and gingiva. In this home-use study, the authors compared the effects of brushing with a newly formulated stannous fluoride toothpaste and a sodium monofluorophosphate dentifrice on bacteria of distinct oral microenvironments. METHODS Adult participants completed a washout phase before baseline sampling of dental plaque, saliva, and scrapings from tongue, cheek, and gingiva, which were used for microbiological analysis. Treatments were randomly assigned: test (62 participants) and control (67 participants) for twice-daily toothbrushing over 8 weeks. After 4 weeks and 8 weeks, posttreatment samples 12 hours after brushing were collected for analysis. At these posttreatment visits, participants brushed in the dental clinic, and an additional sample was collected 4 hours later for microbiological analysis. RESULTS Relative to the control, 12 hours after brushing, the test toothpaste showed greater reductions of bacteria (ranging from 14% to 27%) at the 4-week evaluation, which increased to 27% to 41% after 8 weeks of brushing. Correspondingly, 4 hours after brushing with the test toothpaste at the 4-week evaluation, there were greater reductions of bacteria in the range of 22% to 59%, which increased to a range of 33% to 61% at the 8-week assessment for participants completing the study. CONCLUSIONS The stannous fluoride toothpaste provided bacterial reductions in all oral microenvironments 12 hours after brushing. In addition, the authors observed microbial reductions 4 hours after brushing, which increased after extended use. PRACTICAL IMPLICATIONS The results are appropriate for oral hygiene recommendations by dental professionals.
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Immunomodulatory Effects of 17 β-Estradiol on Epithelial Cells during Bacterial Infections. J Immunol Res 2018; 2018:6098961. [PMID: 30246035 PMCID: PMC6136541 DOI: 10.1155/2018/6098961] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 06/26/2018] [Accepted: 07/24/2018] [Indexed: 02/07/2023] Open
Abstract
The innate immune system can function under hormonal control. 17β-Estradiol (E2) is an important sexual hormone for the reproductive cycle of mammals, and it has immunomodulatory effects on epithelial cells, which are the first line of defense against incoming bacteria. E2 regulates various pathophysiological processes, including the response to infection in epithelial cells, and its effects involve the regulation of innate immune signaling pathways, which are mediated through estrogen receptors (ERs). E2 modulates the expression of inflammatory and antimicrobial elements such as cytokines and antimicrobial peptides. The E2 effects on epithelial cells during bacterial infections are characterized by an increase in the production of antimicrobial peptides and by the diminution of the inflammatory response to abrogate proinflammatory cytokine induction by bacteria. Here, we review several novel molecular mechanisms through which E2 regulates the innate immune response of epithelial cells against bacterial infections.
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11
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Danilova N, Wilkes M, Bibikova E, Youn MY, Sakamoto KM, Lin S. Innate immune system activation in zebrafish and cellular models of Diamond Blackfan Anemia. Sci Rep 2018; 8:5165. [PMID: 29581525 PMCID: PMC5980095 DOI: 10.1038/s41598-018-23561-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 03/14/2018] [Indexed: 12/12/2022] Open
Abstract
Deficiency of ribosomal proteins (RPs) leads to Diamond Blackfan Anemia (DBA) associated with anemia, congenital defects, and cancer. While p53 activation is responsible for many features of DBA, the role of immune system is less defined. The Innate immune system can be activated by endogenous nucleic acids from non-processed pre-rRNAs, DNA damage, and apoptosis that occurs in DBA. Recognition by toll like receptors (TLRs) and Mda5-like sensors induces interferons (IFNs) and inflammation. Dying cells can also activate complement system. Therefore we analyzed the status of these pathways in RP-deficient zebrafish and found upregulation of interferon, inflammatory cytokines and mediators, and complement. We also found upregulation of receptors signaling to IFNs including Mda5, Tlr3, and Tlr9. TGFb family member activin was also upregulated in RP-deficient zebrafish and in RPS19-deficient human cells, which include a lymphoid cell line from a DBA patient, and fetal liver cells and K562 cells transduced with RPS19 shRNA. Treatment of RP-deficient zebrafish with a TLR3 inhibitor decreased IFNs activation, acute phase response, and apoptosis and improved their hematopoiesis and morphology. Inhibitors of complement and activin also had beneficial effects. Our studies suggest that innate immune system contributes to the phenotype of RPS19-deficient zebrafish and human cells.
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Affiliation(s)
- Nadia Danilova
- Department of Molecular, Cell & Developmental Biology, University of California, Los Angeles, CA, USA
| | - Mark Wilkes
- Department of Pediatrics Stanford University School of Medicine, Stanford, CA, USA
| | - Elena Bibikova
- Department of Pediatrics Stanford University School of Medicine, Stanford, CA, USA
| | - Min-Young Youn
- Department of Pediatrics Stanford University School of Medicine, Stanford, CA, USA
| | - Kathleen M Sakamoto
- Department of Pediatrics Stanford University School of Medicine, Stanford, CA, USA.
| | - Shuo Lin
- Department of Molecular, Cell & Developmental Biology, University of California, Los Angeles, CA, USA.
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12
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Tissue-Specific Immunity at the Oral Mucosal Barrier. Trends Immunol 2017; 39:276-287. [PMID: 28923364 DOI: 10.1016/j.it.2017.08.005] [Citation(s) in RCA: 194] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 08/05/2017] [Accepted: 08/11/2017] [Indexed: 02/07/2023]
Abstract
The oral mucosal barrier is constantly exposed to a plethora of triggers requiring immune control, including a diverse commensal microbiome, ongoing damage from mastication, and dietary and airborne antigens. However, how these tissue-specific cues participate in the training of immune responsiveness at this site is minimally understood. Moreover, the mechanisms mediating homeostatic immunity at this interface are not yet fully defined. Here we present basic aspects of the oral mucosal barrier and discuss local cues that may modulate and train local immune responsiveness. We particularly focus on the immune cell network mediating immune surveillance at a specific oral barrier, the gingiva - a constantly stimulated and dynamic environment where homeostasis is often disrupted, resulting in the common inflammatory disease periodontitis.
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13
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Guan SY, Leng RX, Tao JH, Li XP, Ye DQ, Olsen N, Zheng SG, Pan HF. Hypoxia-inducible factor-1α: a promising therapeutic target for autoimmune diseases. Expert Opin Ther Targets 2017; 21:715-723. [PMID: 28553732 DOI: 10.1080/14728222.2017.1336539] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Hypoxia-inducible factor-1α (HIF-1α) plays a crucial role in both innate and adaptive immunity. Emerging evidence indicates that HIF-1α is associated with the inflammation and pathologic activities of autoimmune diseases. Areas covered: Considering that the types of autoimmune diseases are complicated and various, this review aims to cover the typical kinds of autoimmune diseases, discuss the molecular mechanisms, biological functions and expression of HIF-1α in these diseases, and further explore its therapeutic potential. Expert opinion: Inflammation and hypoxia are interdependent. HIF-1α as a key regulator of hypoxia, exerts a crucial role in the balance between Th17 and Treg, and involves in the inflammation and pathologic activities of autoimmune diseases. Although there are many challenges remaining to be overcome, targeting HIF-1α could be a promising strategy for autoimmune diseases therapies.
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Affiliation(s)
- Shi-Yang Guan
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| | - Rui-Xue Leng
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| | - Jin-Hui Tao
- c Department of Rheumatology , Anhui Provincial Hospital , Hefei , China
| | - Xiang-Pei Li
- c Department of Rheumatology , Anhui Provincial Hospital , Hefei , China
| | - Dong-Qing Ye
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| | - Nancy Olsen
- d Division of Rheumatology , Penn State University Hershey College of Medicine , Hershey , PA , USA
| | - Song Guo Zheng
- d Division of Rheumatology , Penn State University Hershey College of Medicine , Hershey , PA , USA
| | - Hai-Feng Pan
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
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