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Sun J, Xu X, Gao S, Pan Q, Liu Z, Huang Y, Lian Y. Refractory pneumonia caused by Prevotella heparinolytica: a case report. J Med Case Rep 2024; 18:213. [PMID: 38685076 PMCID: PMC11059698 DOI: 10.1186/s13256-024-04538-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 04/03/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND Prevotella heparinolytica is a Gram-negative bacterium that is commonly found in the oral, intestinal, and urinary tracts. It has been extensively studied in lower respiratory tract infections in horses, which has heparinolytic activity and can secrete heparinase and further induces virulence factors in cells and causes disease. However, no such cases have been reported in humans. CASE PRESENTATION A 58-year-old male patient from China presented to the respiratory clinic in Suzhou with a productive cough producing white sputum for 20 days and fever for 3 days. Prior to this visit, a chest computed tomography scan was conducted, which revealed multiple patchy nodular opacities in both lungs. On admission, the patient presented with a temperature of 38.1 °C and a pulse rate of 110 beats per minute. Despite routine anti-infective treatment with moxifloxacin, his temperature fluctuated and the treatment was ineffective. The patient was diagnosed with Prevotella heparinolytica infection through metagenomic next-generation sequencing. Therefore, the antibiotics were switched to piperacillin-tazobactam in combination with ornidazole, which alleviated his symptoms; 1 week after discharge, the patient returned to the clinic for a follow-up chest computed tomography, and the opacities on the lungs continued to be absorbed. CONCLUSION Prevotella heparinolytica is an opportunistic pathogen. However, it has not been reported in human pneumonia. In refractory pneumonia, measures such as metagenomic next-generation sequencing can be used to identify pathogens and help guide antibiotic selection and early support.
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Affiliation(s)
- Jiongzhou Sun
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Xun Xu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China.
| | - Shiyuan Gao
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Qiong Pan
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Zian Liu
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Yiwen Huang
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China
| | - Yixin Lian
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, China.
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Abstract
Periodontitis is an inflammatory disease caused by host immune response, resulting in a loss of periodontium and alveolar bone. Immune cells, such as T cells and macrophages, play a critical role in the periodontitis onset. Halofuginone, a natural quinazolinone alkaloid, has been shown to possess anti-fibrosis, anti-cancer, and immunomodulatory properties. However, the effect of halofuginone on periodontitis has never been reported. In this study, a ligature-induced mice model of periodontitis was applied to investigate the potential beneficial effect of halofuginone on periodontitis. We demonstrated that the administration of halofuginone significantly reduced the expression levels of pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α) in vivo, and markedly suppressed immune cell infiltration into the infected sites. Furthermore, we also observed that halofuginone treatment blocked the T-helper 17 (Th17) cell differentiation in vivo and in vitro. We demonstrated for the first time that halofuginone alleviated the onset of periodontitis through reducing immune responses.
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Affiliation(s)
- Jiang Wang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry & Emergency, the Hospital of Stomatology, the Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Bo Wang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Digital Center, the Hospital of Stomatology, the Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Xin Lv
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry & Emergency, the Hospital of Stomatology, the Fourth Military Medical University, Xi’an, Shaanxi, China
| | - Yingjie Wang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry & Emergency, the Hospital of Stomatology, the Fourth Military Medical University, Xi’an, Shaanxi, China
- Yingjie Wang, State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry & Emergency, the Hospital of Stomatology, the Fourth Military Medical University, Xi’an, Shaanxi 710032, China.
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Sperk M, Ambikan AT, Ray S, Singh K, Mikaeloff F, Diez RC, Narayanan A, Vesterbacka J, Nowak P, Sönnerborg A, Neogi U. Fecal Metabolome Signature in the HIV-1 Elite Control Phenotype: Enrichment of Dipeptides Acts as an HIV-1 Antagonist but a Prevotella Agonist. J Virol 2021; 95:e0047921. [PMID: 34232744 PMCID: PMC8387056 DOI: 10.1128/jvi.00479-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 06/30/2021] [Indexed: 12/21/2022] Open
Abstract
HIV-1 elite controllers (EC) are a rare group among HIV-1-infected individuals who can naturally control viral replication for a prolonged period. Due to their heterogeneous nature, no universal mechanism could be attributed to the EC status; instead, several host and viral factors have been discussed as playing a role. In this study, we investigated the fecal metabolome and microbiome in a Swedish cohort of EC (n = 14), treatment-naive viremic progressors (VP; n = 16), and HIV-negative individuals (HC; n = 12). Fecal untargeted metabolomics was performed by four ultra-high-performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS). Molecular docking and biochemical microscale thermophoresis (MST) were used to describe the peptide-metabolite interactions. Single-cycle infectivity assays were performed in TZM-Bl cell lines using CCR5- and CXCR4-tropic HIV-1 strains. The microbiome analysis was performed using 16S rRNA sequencing. Th effects of metabolites on bacterial species viability were determined using several clinical isolates. We observed an enrichment of dipeptides in EC compared to VP and HC (adjusted P < 0.05). In silico analysis by molecular docking, in vitro biochemical assays, and ex vivo infection assays identified anti-HIV-1 properties for two dipeptides (WG and VQ) that could bind to the HIV-1 gp120, of which WG was more potent. The microbiome analysis identified enrichment of the genus Prevotella in EC, and these dipeptides supported bacterial growth of the genus Prevotella in vitro. The enrichments of the dipeptides and higher abundance of Prevotella have a distinct mechanism of elite control status in HIV-1 infection that influences host metabolism. IMPORTANCE HIV-1 elite controllers (EC) are a rare group among HIV-1-infected individuals who can naturally control viral replication for a prolonged period. Due to their heterogeneous nature, no universal mechanism could be attributed to the EC status; instead, several host and viral factors have been discussed as playing a role. In this study, we investigated the fecal metabolome and microbiome in a Swedish cohort of EC, treatment-naive viremic progressors (VP), and HIV-negative individuals (HC). We observed an enrichment of dipeptides in EC compared to the other two study groups. In silico and in vitro analyses identified anti-HIV-1 properties for two dipeptides that could bind to the HIV-1 gp120 and act as an HIV-1 antagonist. Furthermore, these dipeptides supported bacterial growth of the genus Prevotella in vitro that was enriched in EC, which influences host metabolism. Thus, increased levels of both dipeptides and Prevotella could provide beneficial effects for EC.
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Affiliation(s)
- Maike Sperk
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Stockholm, Sweden
| | - Anoop T. Ambikan
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Stockholm, Sweden
| | - Shilpa Ray
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Stockholm, Sweden
| | - Kamal Singh
- Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri, USA, 65211, USA
| | - Flora Mikaeloff
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Stockholm, Sweden
| | - Rafael Ceña Diez
- Department of Medicine Huddinge, Division of Infectious Diseases, Karolinska Institute, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Ashwathy Narayanan
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Stockholm, Sweden
| | - Jan Vesterbacka
- Department of Medicine Huddinge, Division of Infectious Diseases, Karolinska Institute, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Piotr Nowak
- Department of Medicine Huddinge, Division of Infectious Diseases, Karolinska Institute, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Anders Sönnerborg
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Stockholm, Sweden
- Department of Medicine Huddinge, Division of Infectious Diseases, Karolinska Institute, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Ujjwal Neogi
- Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institute, ANA Futura, Stockholm, Sweden
- Manipal Institute of Virology (MIV), Manipal Academy of Higher Education, Manipal, Karnataka, India
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Kang MS, Moon JH, Park SC, Jang YP, Choung SY. Spirulina maxima reduces inflammation and alveolar bone loss in Porphyromonas gingivalis-induced periodontitis. Phytomedicine 2021; 81:153420. [PMID: 33278781 DOI: 10.1016/j.phymed.2020.153420] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/29/2020] [Accepted: 11/19/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Periodontitis is a common oral disease characterized as inflammation on gingival tissue and alveolar bone resorption. Spirulina maxima has been reported to have anti-oxidative and anti-inflammatory effects on gastric ulcers. However, its effects on gingival inflammation and alveolar bone resorption of periodontitis have not been studied. PURPOSE This study was designed to investigate the effects of S. maxima on the P. gingivalis-induced periodontitis and to elucidate its mechanism. METHODS The phycocyanin contents in S. maxima were identified by high-performance liquid chromatography. 8-week old SD rats were induced periodontitis by inoculation with P. gingivalis for 14 days. The rats were then orally treated with S. maxima 100, 200, 400 mg/kg, or indomethacin (IND, positive control) 5 mg/kg for an additional 14 days. Inflammatory responses, expressions of collagenases in gingival tissue, osteoclast formation and activation, alveolar bone resorption, osteogenesis-related markers, and BMP2/Smad signaling in alveolar bone were measured. RESULTS Pro-inflammatory cytokines such as TNF-α, IL-1β, IL-6, and inflammatory transcription factor NF-κB were decreased in gingival tissue by S. maxima administration. Also, myeloperoxidase (MPO) activity and matrix metalloproteinase (MMPs) expression were decreased by S. maxima administration. Conversely, S. maxima increased IL-4, anti-inflammatory cytokine from Th2 cells. The osteoprotegerin (OPG) / receptor activator of NF-κB ligand (RANKL) expression ratio, which represents osteoclast-osteoblast balance, was increased in S. maxima-treated groups. The alveolar bone loss and the number of TRAP-positive osteoclast cells were also declined in S. maxima-treated groups while the osteoblasts count was increased. Besides, in S. maxima-treated groups, the osteogenesis-related factors were promoted and BMP-2/Smad pathway was up-regulated in a periodontitis condition. CONCLUSION S. maxima reduces periodontitis induced by P. gingivalis through anti-inflammatory effect and resultant reduction in bone loss, suggesting that S. maxima might be a potential agent for treating periodontitis.
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Affiliation(s)
- Min Song Kang
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea
| | - Ji-Hoi Moon
- Department of Life and Nanopharmaceutical Sciences, Department of Oral Microbiology, School of Dentistry, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea
| | - Sang Cheol Park
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea
| | - Young Pyo Jang
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea; Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea
| | - Se Young Choung
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, South Korea.
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Kamarajan P, Ateia I, Shin JM, Fenno JC, Le C, Zhan L, Chang A, Darveau R, Kapila YL. Periodontal pathogens promote cancer aggressivity via TLR/MyD88 triggered activation of Integrin/FAK signaling that is therapeutically reversible by a probiotic bacteriocin. PLoS Pathog 2020; 16:e1008881. [PMID: 33002094 PMCID: PMC7529280 DOI: 10.1371/journal.ppat.1008881] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 08/12/2020] [Indexed: 12/13/2022] Open
Abstract
Epidemiological studies reveal significant associations between periodontitis and oral cancer. However, knowledge about the contribution of periodontal pathogens to oral cancer and potential regulatory mechanisms involved is limited. Previously, we showed that nisin, a bacteriocin and commonly used food preservative, reduced oral cancer tumorigenesis and extended the life expectancy in tumor-bearing mice. In addition, nisin has antimicrobial effects on key periodontal pathogens. Thus, the purpose of this study was to test the hypothesis that key periodontal pathogens (Porphyromonas gingivalis, Treponema denticola, and Fusobacterium nucleatum) promote oral cancer via specific host-bacterial interactions, and that bacteriocin/nisin therapy may modulate these responses. All three periodontal pathogens enhanced oral squamous cell carcinoma (OSCC) cell migration, invasion, tumorsphere formation, and tumorigenesis in vivo, without significantly affecting cell proliferation or apoptosis. In contrast, oral commensal bacteria did not affect OSCC cell migration. Pathogen-enhanced OSCC cell migration was mediated via integrin alpha V and FAK activation, since stably blocking alpha V or FAK expression abrogated these effects. Nisin inhibited these pathogen-mediated processes. Further, Treponema denticola induced TLR2 and 4 and MyD88 expression. Stable suppression of MyD88 significantly inhibited Treponema denticola-induced FAK activation and abrogated pathogen-induced migration. Together, these data demonstrate that periodontal pathogens contribute to a highly aggressive cancer phenotype via crosstalk between TLR/MyD88 and integrin/FAK signaling. Nisin can modulate these pathogen-mediated effects, and thus has therapeutic potential as an antimicrobial and anti-tumorigenic agent.
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Affiliation(s)
- Pachiyappan Kamarajan
- Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco, CA, United States of America
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, United States of America
| | - Islam Ateia
- Department of Oral Medicine and Periodontology, Mansoura University, Mansoura, Egypt
| | - Jae M. Shin
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, United States of America
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, United States of America
| | - J. Christopher Fenno
- Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann arbor, MI, United States of America
| | - Charles Le
- Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco, CA, United States of America
| | - Ling Zhan
- Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco, CA, United States of America
| | - Ana Chang
- Department of Periodontics, Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, United States of America
| | - Richard Darveau
- Department of Periodontics, Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, United States of America
| | - Yvonne L. Kapila
- Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco, CA, United States of America
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, United States of America
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Happel AU, Kullin B, Gamieldien H, Wentzel N, Zauchenberger CZ, Jaspan HB, Dabee S, Barnabas SL, Jaumdally SZ, Dietrich J, Gray G, Bekker LG, Froissart R, Passmore JAS. Exploring potential of vaginal Lactobacillus isolates from South African women for enhancing treatment for bacterial vaginosis. PLoS Pathog 2020; 16:e1008559. [PMID: 32497109 PMCID: PMC7271994 DOI: 10.1371/journal.ppat.1008559] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 04/16/2020] [Indexed: 12/12/2022] Open
Abstract
Antibiotics continue to be the standard-of-care for bacterial vaginosis (BV), although recurrence rates are high. Vaginal probiotics may improve durability of BV treatment, although few probiotics for vaginal health contain Lactobacillus spp. that commonly colonize the lower female genital tract. Characteristics of vaginal Lactobacillus strains from South African women were evaluated for their probiotic potential in vitro compared to strains from commercial vaginal products, including growth at varying pHs, ability to lower pH, produce D-/L-lactate and H2O2, influence growth of BV-associated Gardnerella vaginalis and Prevotella bivia, adherence to cervical cells and susceptibility to antibiotics. Fifty-seven Lactobacillus strains were purified from cervico-vaginal fluid, including L. crispatus, L. jensenii, L. gasseri, L. mucosae, and L. vaginalis. L crispatus strains grew better at pHs below 4.5 and lowered pH more effectively than other strains. Production of D-/L-lactate and H2O2 varied between Lactobacillus species and strains. Lactobacillus strains generally inhibited P. bivia more uniformly than G. vaginalis isolates. All vaginal Lactobacillus isolates were resistant to metronidazole while susceptibility to clindamycin varied. Furthermore, vaginal Lactobacillus strains tended to be broadly susceptible to penicillin, amoxicillin, rifampicin and rifabutin. Whole-genome-sequencing of five of the best-performing vaginal Lactobacillus strains confirmed their likely safety, due to antimicrobial resistance elements being largely absent, while putative intact prophages were present in the genomes of two of the five strains. Overall, vaginal Lactobacillus strains largely performed better in these in vitro assays than probiotic strains currently used in probiotics for vaginal health. Including the best-performing vaginal Lactobacillus isolates in a region-specific probiotic for vaginal health may result in improved BV treatment options.
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Affiliation(s)
- Anna-Ursula Happel
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
| | - Brian Kullin
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
| | - Hoyam Gamieldien
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
| | - Nicole Wentzel
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
| | - Chambrez Z. Zauchenberger
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
| | - Heather B. Jaspan
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
- Seattle Children’s Hospital, Seattle, United States of America
| | - Smritee Dabee
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
- Seattle Children’s Hospital, Seattle, United States of America
| | - Shaun L. Barnabas
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
- Family Centre for Research with Ubuntu (FAMCRU), Stellenbosch University, Tygerberg, South Africa
| | - Shameem Z. Jaumdally
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
| | - Janan Dietrich
- Perinatal HIV Research Unit (PHRU), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
- Health Systems Research Unit, South African Medical Research Council, Cape Town, South Africa
| | - Glenda Gray
- Perinatal HIV Research Unit (PHRU), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
- Health Systems Research Unit, South African Medical Research Council, Cape Town, South Africa
| | - Linda-Gail Bekker
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
- Desmond Tutu HIV Foundation, University of Cape Town, Cape Town, South Africa
| | - Remy Froissart
- UMR MIVEGEC CNRS-IRD-UM, University Montpellier, Montpellier, France
| | - Jo-Ann S. Passmore
- Department of Pathology, Institute of Infectious Disease and Molecular Medicine (IDM), University of Cape Town, Cape Town, South Africa
- NRF-DST CAPRISA Centre of Excellence in HIV Prevention, Cape Town, South Africa
- National Health Laboratory Service (NHLS), Cape Town, South Africa
- * E-mail:
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Arastu‐Kapur S, Nguyen M, Raha D, Ermini F, Haditsch U, Araujo J, De Lannoy IAM, Ryder MI, Dominy SS, Lynch C, Holsinger LJ. Treatment of Porphyromonas gulae infection and downstream pathology in the aged dog by lysine-gingipain inhibitor COR388. Pharmacol Res Perspect 2020; 8:e00562. [PMID: 31999052 PMCID: PMC6990966 DOI: 10.1002/prp2.562] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/24/2019] [Accepted: 01/04/2020] [Indexed: 01/04/2023] Open
Abstract
COR388, a small-molecule lysine-gingipain inhibitor, is currently being investigated in a Phase 2/3 clinical trial for Alzheimer's disease (AD) with exploratory endpoints in periodontal disease. Gingipains are produced by two species of bacteria, Porphyromonas gingivalis and Porphyromonas gulae, typically associated with periodontal disease and systemic infections in humans and dogs, respectively. P. gulae infection in dogs is associated with periodontal disease, which provides a physiologically relevant model to investigate the pharmacology of COR388. In the current study, aged dogs with a natural oral infection of P. gulae and periodontal disease were treated with COR388 by oral administration for up to 90 days to assess lysine-gingipain target engagement and reduction of bacterial load and downstream pathology. In a 28-day dose-response study, COR388 inhibited the lysine-gingipain target and reduced P. gulae load in saliva, buccal cells, and gingival crevicular fluid. The lowest effective dose was continued for 90 days and was efficacious in continuous reduction of bacterial load and downstream periodontal disease pathology. In a separate histology study, dog brain tissue showed evidence of P. gulae DNA and neuronal lysine-gingipain, demonstrating that P. gulae infection is systemic and spreads beyond its oral reservoir, similar to recent observations of P. gingivalis in humans. Together, the pharmacokinetics and pharmacodynamics of COR388 lysine-gingipain inhibition, along with reduction of bacterial load and periodontal disease in naturally occurring P. gulae infection in the dog, support the use of COR388 in targeting lysine-gingipain and eliminating P. gingivalis infection in humans.
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Affiliation(s)
| | | | | | | | | | | | | | - Mark I. Ryder
- University of California San FranciscoSan FranciscoCAUSA
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Abstract
Periodontitis is a polymicrobial infectious disease that leads to inflammation of the gingiva, resulting in teeth loss by various causes such as inflammation-mediated bone resorption. Recently, many investigators have reported that the periodontitis resulting from persistent low-grade infection of Gram-negative bacteria such as Porphyromonas gingivalis (Pg) is associated with increased atherosclerosis, diabetes mellitus, and other systemic diseases through blood stream. On the other hand, carotenoids belong among phytochemicals that are responsible for different colors of the foods. It is important to examine whether carotenoids are effective to the inhibition of periodontal infection/inflammation cascades. This review summarizes the advanced state of knowledge about suppression of periodontal infection by several carotenoids. A series of findings suggest that carotenoids intake may provide novel strategy for periodontitis treatment, although further study will be needed.
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Affiliation(s)
- Koji Naruishi
- Department of Periodontology and Endodontology, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto, Tokushima 770-8504, Japan
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Yang L, Jing L, Jiao Y, Wang L, Marchesan JT, Offenbacher S, Schoenfisch MH. In Vivo Antibacterial Efficacy of Nitric Oxide-Releasing Hyperbranched Polymers against Porphyromonas gingivalis. Mol Pharm 2019; 16:4017-4023. [PMID: 31361146 PMCID: PMC6752707 DOI: 10.1021/acs.molpharmaceut.9b00671] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The in vivo antibacterial activity of NO-releasing hyperbranched polymers was evaluated against Porphyromonas gingivalis, a key oral pathogen associated with periodontitis, using a murine subcutaneous chamber model. Escalating doses of NO-releasing polymers (1.5, 7.5, and 37.5 mg/kg) were administered into a P. gingivalis-infected chamber once a day for 3 days. Chamber fluids were collected on day 4, with microbiological evaluation indicating a dose-dependent bactericidal action. In particular, NO-releasing polymers at 37.5 mg/kg (1170 μg of NO/kg) achieved complete bacterial eradication (>6-log reduction in bacterial viability), demonstrating greater efficacy than amoxicillin (∼4-log reduction in bacterial viability), a commonly used antibiotic. Time-kill assays further revealed that largest dose (37.5 mg/kg; 1170 μg of NO/kg) resulted in ∼3-log killing of P. gingivalis after only a single dose. Based on these results, the potential clinical utility of NO-releasing hyperbranched polymers appears promising, particularly for oral health applications.
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Affiliation(s)
| | | | | | - Lufei Wang
- Oral and Craniofacial Biomedicine Program, School of Dentistry , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
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de Oliveira AB, Ferrisse TM, Marques RS, de Annunzio SR, Brighenti FL, Fontana CR. Effect of Photodynamic Therapy on Microorganisms Responsible for Dental Caries: A Systematic Review and Meta-Analysis. Int J Mol Sci 2019; 20:ijms20143585. [PMID: 31340425 PMCID: PMC6678311 DOI: 10.3390/ijms20143585] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 12/21/2022] Open
Abstract
The aim of this study was to perform a systematic review of the literature followed by a meta-analysis about the efficacy of photodynamic therapy (PDT) on the microorganisms responsible for dental caries. The research question and the keywords were constructed according to the PICO strategy. The article search was done in Embase, Lilacs, Scielo, Medline, Scopus, Cochrane Library, Web of Science, Science Direct, and Pubmed databases. Randomized clinical trials and in vitro studies were selected in the review. The study was conducted according the PRISMA guideline for systematic review. A total of 34 articles were included in the qualitative analysis and four articles were divided into two subgroups to perform the meta-analysis. Few studies have achieved an effective microbial reduction in microorganisms associated with the pathogenesis of dental caries. The results highlight that there is no consensus about the study protocols for PDT against cariogenic microorganisms, although the results showed the PDT could be a good alternative for the treatment of dental caries.
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Affiliation(s)
- Analú Barros de Oliveira
- São Paulo State University (UNESP), School of Dentistry, Araraquara, São Paulo 14801-903, Brazil
| | - Túlio Morandin Ferrisse
- São Paulo State University (UNESP), School of Dentistry, Araraquara, São Paulo 14801-903, Brazil
| | - Raquel Souza Marques
- São Paulo State University (UNESP), School of Dentistry, Araraquara, São Paulo 14801-903, Brazil
| | - Sarah Raquel de Annunzio
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara, São Paulo 14800-903, Brazil
| | | | - Carla Raquel Fontana
- São Paulo State University (UNESP), School of Pharmaceutical Sciences, Araraquara, São Paulo 14800-903, Brazil.
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11
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Guevara T, Rodríguez-Banqueri A, Lasica AM, Ksiazek M, Potempa BA, Potempa J, Gomis-Rüth FX. Structural determinants of inhibition of Porphyromonas gingivalis gingipain K by KYT-36, a potent, selective, and bioavailable peptidase inhibitor. Sci Rep 2019; 9:4935. [PMID: 30894633 PMCID: PMC6426963 DOI: 10.1038/s41598-019-41354-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 03/07/2019] [Indexed: 01/24/2023] Open
Abstract
Porphyromonas gingivalis is a member of the dysbiotic oral microbiome and a "keystone pathogen" that causes severe periodontal disease, which is among the most prevalent infectious diseases. Part of the virulence factors secreted by P. gingivalis are the essential cysteine peptidases gingipain K (Kgp) and R (RgpA and RgpB), which account for 85% of the extracellular proteolytic activity of the pathogen and are thus prime targets for inhibition. We report the high-resolution (1.20 Å) complex structure of Kgp with KYT-36, a peptide-derived, potent, bioavailable and highly selective inhibitor, which is widely used for studies in vitro, in cells and in vivo. Sub-nanomolar inhibition of Kgp is achieved by tight binding to the active-site cleft, which is covered for its sub-sites S3 through S1' under establishment of nine hydrophobic interactions, 14 hydrogen bonds and one salt bridge. In addition, an inhibitor carbonyl carbon that mimics the scissile carbonyl of substrates is pyramidalized and just 2.02 Å away from the catalytic nucleophile of Kgp, C477Sγ. Thus, the crystal structure emulates a reaction intermediate of the first nucleophilic attack during catalysis of cysteine peptidases. The present study sets the pace for the development of tailored next-generation drugs to tackle P. gingivalis.
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Affiliation(s)
- Tibisay Guevara
- Proteolysis Lab, Structural Biology Unit, "María de Maeztu" Unit of Excellence, Molecular Biology Institute of Barcelona (CSIC), Barcelona Science Park, Helix Building, c/Baldiri Reixac, 15-21, 08028, Barcelona, Catalonia, Spain
| | - Arturo Rodríguez-Banqueri
- Proteolysis Lab, Structural Biology Unit, "María de Maeztu" Unit of Excellence, Molecular Biology Institute of Barcelona (CSIC), Barcelona Science Park, Helix Building, c/Baldiri Reixac, 15-21, 08028, Barcelona, Catalonia, Spain
| | - Anna M Lasica
- Department of Bacterial Genetics, Faculty of Biology, University of Warsaw, ul. Miecznikowa 1, 02-096, Warszawa, Poland
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, 501 South Preston Street, Louisville, KY, 40202, USA
| | - Miroslaw Ksiazek
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, 501 South Preston Street, Louisville, KY, 40202, USA
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387, Kraków, Poland
| | - Barbara A Potempa
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387, Kraków, Poland
| | - Jan Potempa
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, 501 South Preston Street, Louisville, KY, 40202, USA.
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387, Kraków, Poland.
| | - F Xavier Gomis-Rüth
- Proteolysis Lab, Structural Biology Unit, "María de Maeztu" Unit of Excellence, Molecular Biology Institute of Barcelona (CSIC), Barcelona Science Park, Helix Building, c/Baldiri Reixac, 15-21, 08028, Barcelona, Catalonia, Spain.
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12
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Dominy SS, Lynch C, Ermini F, Benedyk M, Marczyk A, Konradi A, Nguyen M, Haditsch U, Raha D, Griffin C, Holsinger LJ, Arastu-Kapur S, Kaba S, Lee A, Ryder MI, Potempa B, Mydel P, Hellvard A, Adamowicz K, Hasturk H, Walker GD, Reynolds EC, Faull RLM, Curtis MA, Dragunow M, Potempa J. Porphyromonas gingivalis in Alzheimer's disease brains: Evidence for disease causation and treatment with small-molecule inhibitors. Sci Adv 2019; 5:eaau3333. [PMID: 30746447 PMCID: PMC6357742 DOI: 10.1126/sciadv.aau3333] [Citation(s) in RCA: 944] [Impact Index Per Article: 188.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 12/11/2018] [Indexed: 05/19/2023]
Abstract
Porphyromonas gingivalis, the keystone pathogen in chronic periodontitis, was identified in the brain of Alzheimer's disease patients. Toxic proteases from the bacterium called gingipains were also identified in the brain of Alzheimer's patients, and levels correlated with tau and ubiquitin pathology. Oral P. gingivalis infection in mice resulted in brain colonization and increased production of Aβ1-42, a component of amyloid plaques. Further, gingipains were neurotoxic in vivo and in vitro, exerting detrimental effects on tau, a protein needed for normal neuronal function. To block this neurotoxicity, we designed and synthesized small-molecule inhibitors targeting gingipains. Gingipain inhibition reduced the bacterial load of an established P. gingivalis brain infection, blocked Aβ1-42 production, reduced neuroinflammation, and rescued neurons in the hippocampus. These data suggest that gingipain inhibitors could be valuable for treating P. gingivalis brain colonization and neurodegeneration in Alzheimer's disease.
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Affiliation(s)
- Stephen S. Dominy
- Cortexyme, Inc., 269 East Grand Ave., South San Francisco, CA, USA
- Corresponding author.
| | - Casey Lynch
- Cortexyme, Inc., 269 East Grand Ave., South San Francisco, CA, USA
| | - Florian Ermini
- Cortexyme, Inc., 269 East Grand Ave., South San Francisco, CA, USA
| | - Malgorzata Benedyk
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
| | - Agata Marczyk
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Andrei Konradi
- Cortexyme, Inc., 269 East Grand Ave., South San Francisco, CA, USA
| | - Mai Nguyen
- Cortexyme, Inc., 269 East Grand Ave., South San Francisco, CA, USA
| | - Ursula Haditsch
- Cortexyme, Inc., 269 East Grand Ave., South San Francisco, CA, USA
| | - Debasish Raha
- Cortexyme, Inc., 269 East Grand Ave., South San Francisco, CA, USA
| | | | | | | | - Samer Kaba
- Cortexyme, Inc., 269 East Grand Ave., South San Francisco, CA, USA
| | - Alexander Lee
- Cortexyme, Inc., 269 East Grand Ave., South San Francisco, CA, USA
| | - Mark I. Ryder
- Division of Periodontology, Department of Orofacial Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Barbara Potempa
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
| | - Piotr Mydel
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
- Broegelman Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Annelie Hellvard
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
- Broegelman Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Karina Adamowicz
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Hatice Hasturk
- The Forsyth Institute, Cambridge, MA, USA
- Harvard University School of Dental Medicine, Boston, MA, USA
| | - Glenn D. Walker
- Cooperative Research Centre for Oral Health Science, Melbourne Dental School and the Bio21 Institute of Molecular Science and Biotechnology, University of Melbourne, Melbourne, Victoria, Australia
| | - Eric C. Reynolds
- Cooperative Research Centre for Oral Health Science, Melbourne Dental School and the Bio21 Institute of Molecular Science and Biotechnology, University of Melbourne, Melbourne, Victoria, Australia
| | - Richard L. M. Faull
- Department of Anatomy with Radiology, Centre for Brain Research and NeuroValida, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Maurice A. Curtis
- Centre for Brain Research and NeuroValida, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
- Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Mike Dragunow
- Centre for Brain Research and NeuroValida, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
- Department of Pharmacology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Jan Potempa
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
- Department of Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, Louisville, KY, USA
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13
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Sargent J, Sohaey R, Trivedi N. Sonographic detection of an infected maternal urachal cyst during pregnancy. J Clin Ultrasound 2018; 46:355-357. [PMID: 28980334 DOI: 10.1002/jcu.22540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/09/2017] [Accepted: 08/15/2017] [Indexed: 06/07/2023]
Abstract
Infection of a maternal urachal cyst during pregnancy is rare; Sonography is an important diagnostic tool that can help minimize maternal and fetal complications. We describe the case of a 35-year-old multiparous woman presenting in the third trimester with 2 weeks of fever, abdominal pain, and urinary symptoms. Imaging showed a 5-cm complex anterior midline mass, found intraoperatively to be eroding into the uterus. Sonographic imaging aided in the diagnosis and management of the urachal cyst, and antepartum sonographic measurements of the lower uterine segment helped to counsel regarding a trial of labor. Following treatment, the patient stabilized and had an uncomplicated vaginal delivery.
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Affiliation(s)
- James Sargent
- Division of Maternal-Fetal Medicine, Oregon Health & Science University, Portland, Oregon
| | - Roya Sohaey
- Diagnostic Radiology, Oregon Health & Science University, Portland, Oregon
| | - Neha Trivedi
- Department of OBGYN, Division of Maternal Fetal Medicine, Kaiser Permanente San Diego Medical Center, San Diego, California
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14
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Abstract
Bovine foot rot (BFR) is an infectious disease of the interdigital skin and subcutaneous tissues of beef and dairy cattle that occurs under a variety of management and environmental settings. The anaerobic, gram-negative bacteria Fusobacterium necrophorum, Porphyromonas levii, and Prevotella intermedia are commonly isolated from lesions. A multitude of host, agent, and environmental factors contribute to the development of BFR. Initiation of systemic antimicrobial therapy early in the course of disease commonly leads to resolution. Delays in treatment may result in extension of infection into deeper bone, synovial structures, or ligamentous structures, and the prognosis for recovery is reduced.
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Affiliation(s)
- David C Van Metre
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 300 W. Drake Road, Fort Collins, CO 80523-1678, USA.
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15
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Jang EY, Kim M, Noh MH, Moon JH, Lee JY. In Vitro Effects of Polyphosphate against Prevotella intermedia in Planktonic Phase and Biofilm. Antimicrob Agents Chemother 2016; 60:818-26. [PMID: 26596937 PMCID: PMC4750699 DOI: 10.1128/aac.01861-15] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Accepted: 11/14/2015] [Indexed: 11/20/2022] Open
Abstract
Polyphosphate (polyP) has gained a wide interest in the food industry due to its potential as a decontaminating agent. In this study, we examined the effect of sodium tripolyphosphate (polyP3; Na5P3O10) against planktonic and biofilm cells of Prevotella intermedia, a major oral pathogen. The MIC of polyP3 against P. intermedia ATCC 49046 determined by agar dilution method was 0.075%, while 0.05% polyP3 was bactericidal against P. intermedia in time-kill analysis performed using liquid medium. A crystal violet binding assay for the assessment of biofilm formation by P. intermedia showed that sub-MICs of polyP3 significantly decreased biofilm formation. Under the scanning electron microscope, decreased numbers of P. intermedia cells forming the biofilms were observed when the bacterial cells were incubated with 0.025% or higher concentrations of polyP3. Assessment of biofilm viability with LIVE/DEAD staining and viable cell count methods showed that 0.05% or higher concentrations of polyP3 significantly decreased the viability of the preformed biofilms in a concentration-dependent manner. The zone sizes of alpha-hemolysis formed on horse blood agar produced by P. intermedia were decreased in the presence of polyP3. The expression of the genes encoding hemolysins and the genes of the hemin uptake (hmu) locus was downregulated by polyP3. Collectively, our results show that polyP is an effective antimicrobial agent against P. intermedia in biofilms as well as planktonic phase, interfering with the process of hemin acquisition by the bacterium.
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Affiliation(s)
- Eun-Young Jang
- Department of Maxillofacial Biomedical Engineering, School of Dentistry, and Institute of Oral Biology, Kyung Hee University, Seoul, Republic of Korea
| | - Minjung Kim
- Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul, Republic of Korea
| | - Mi Hee Noh
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - Ji-Hoi Moon
- Department of Maxillofacial Biomedical Engineering, School of Dentistry, and Institute of Oral Biology, Kyung Hee University, Seoul, Republic of Korea Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul, Republic of Korea
| | - Jin-Yong Lee
- Department of Maxillofacial Biomedical Engineering, School of Dentistry, and Institute of Oral Biology, Kyung Hee University, Seoul, Republic of Korea
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16
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Stone VN, Parikh HI, El-rami F, Ge X, Chen W, Zhang Y, Kellogg GE, Xu P. Identification of Small-Molecule Inhibitors against Meso-2, 6-Diaminopimelate Dehydrogenase from Porphyromonas gingivalis. PLoS One 2015; 10:e0141126. [PMID: 26544875 PMCID: PMC4636305 DOI: 10.1371/journal.pone.0141126] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 10/05/2015] [Indexed: 01/03/2023] Open
Abstract
Species-specific antimicrobial therapy has the potential to combat the increasing threat of antibiotic resistance and alteration of the human microbiome. We therefore set out to demonstrate the beginning of a pathogen-selective drug discovery method using the periodontal pathogen Porphyromonas gingivalis as a model. Through our knowledge of metabolic networks and essential genes we identified a “druggable” essential target, meso-diaminopimelate dehydrogenase, which is found in a limited number of species. We adopted a high-throughput virtual screen method on the ZINC chemical library to select a group of potential small-molecule inhibitors. Meso-diaminopimelate dehydrogenase from P. gingivalis was first expressed and purified in Escherichia coli then characterized for enzymatic inhibitor screening studies. Several inhibitors with similar structural scaffolds containing a sulfonamide core and aromatic substituents showed dose-dependent inhibition. These compounds were further assayed showing reasonable whole-cell activity and the inhibition mechanism was determined. We conclude that the establishment of this target and screening strategy provides a model for the future development of new antimicrobials.
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Affiliation(s)
- Victoria N. Stone
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, United States of America
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Hardik I. Parikh
- Department of Medicinal Chemistry, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Fadi El-rami
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, United States of America
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Xiuchun Ge
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Weihau Chen
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Yan Zhang
- Department of Medicinal Chemistry, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Glen E. Kellogg
- Department of Medicinal Chemistry, Virginia Commonwealth University, Richmond, Virginia, United States of America
- Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Ping Xu
- Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, United States of America
- Department of Microbiology and Immunology, Virginia Commonwealth University, Richmond, Virginia, United States of America
- Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, Virginia, United States of America
- * E-mail:
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17
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Lucas AR, Verma RK, Dai E, Liu L, Chen H, Kesavalu S, Rivera M, Velsko I, Ambadapadi S, Chukkapalli S, Kesavalu L. Myxomavirus anti-inflammatory chemokine binding protein reduces the increased plaque growth induced by chronic Porphyromonas gingivalis oral infection after balloon angioplasty aortic injury in mice. PLoS One 2014; 9:e111353. [PMID: 25354050 PMCID: PMC4213024 DOI: 10.1371/journal.pone.0111353] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 09/21/2014] [Indexed: 01/30/2023] Open
Abstract
Thrombotic occlusion of inflammatory plaque in coronary arteries causes myocardial infarction. Treatment with emergent balloon angioplasty (BA) and stent implant improves survival, but restenosis (regrowth) can occur. Periodontal bacteremia is closely associated with inflammation and native arterial atherosclerosis, with potential to increase restenosis. Two virus-derived anti-inflammatory proteins, M-T7 and Serp-1, reduce inflammation and plaque growth after BA and transplant in animal models through separate pathways. M-T7 is a broad spectrum C, CC and CXC chemokine-binding protein. Serp-1 is a serine protease inhibitor (serpin) inhibiting thrombotic and thrombolytic pathways. Serp-1 also reduces arterial inflammation and improves survival in a mouse herpes virus (MHV68) model of lethal vasculitis. In addition, Serp-1 demonstrated safety and efficacy in patients with unstable coronary disease and stent implant, reducing markers of myocardial damage. We investigate here the effects of Porphyromonas gingivalis, a periodontal pathogen, on restenosis after BA and the effects of blocking chemokine and protease pathways with M-T7 and Serp-1. ApoE−/− mice had aortic BA and oral P. gingivalis infection. Arterial plaque growth was examined at 24 weeks with and without anti-inflammatory protein treatment. Dental plaques from mice infected with P. gingivalis tested positive for infection. Neither Serp-1 nor M-T7 treatment reduced infection, but IgG antibody levels in mice treated with Serp-1 and M-T7 were reduced. P. gingivalis significantly increased monocyte invasion and arterial plaque growth after BA (P<0.025). Monocyte invasion and plaque growth were blocked by M-T7 treatment (P<0.023), whereas Serp-1 produced only a trend toward reductions. Both proteins modified expression of TLR4 and MyD88. In conclusion, aortic plaque growth in ApoE−/− mice increased after angioplasty in mice with chronic oral P. gingivalis infection. Blockade of chemokines, but not serine proteases significantly reduced arterial plaque growth, suggesting a central role for chemokine-mediated inflammation after BA in P. gingivalis infected mice.
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Affiliation(s)
- Alexandra R. Lucas
- Division of Cardiovascular Medicine, Departments of Medicine and Molecular Genetics & Microbiology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
- * E-mail: (AL); (LK)
| | - Raj K. Verma
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, Florida, United States of America
| | - Erbin Dai
- Division of Cardiovascular Medicine, Departments of Medicine and Molecular Genetics & Microbiology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Liying Liu
- Division of Cardiovascular Medicine, Departments of Medicine and Molecular Genetics & Microbiology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Hao Chen
- Division of Cardiovascular Medicine, Departments of Medicine and Molecular Genetics & Microbiology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Sheela Kesavalu
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, Florida, United States of America
| | - Mercedes Rivera
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, Florida, United States of America
| | - Irina Velsko
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, Florida, United States of America
| | - Sriram Ambadapadi
- Division of Cardiovascular Medicine, Departments of Medicine and Molecular Genetics & Microbiology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Sasanka Chukkapalli
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, Florida, United States of America
| | - Lakshmyya Kesavalu
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, Florida, United States of America
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, Florida, United States of America
- * E-mail: (AL); (LK)
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18
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Wyganowska-Świątkowska M, Szkaradkiewicz AK, Karpiński TM, Marcinkowski JT. The evaluation of enamel matrix derivative on subgingival microbial environment in non-surgical periodontal therapy. Ann Agric Environ Med 2013; 20:431-435. [PMID: 24069844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
INTRODUCTION AND OBJECTIVE Recent in vitro studies indicate that enamel matrix derivative (EMD) could modulate the growth of periodontopathogens. The aim of the presented study was an analysis of the influence of EMD on the presence of Porphyromonas and Prevotella bacteria in the periodontal pockets of patients with chronic periodontitis in non-surgical periodontal therapy. MATERIALS AND METHODS The studies were conducted on 20 patients. The condition of the periodontium was evaluated by clinical indexes: API. SBI. PD. CAL before and 3 months after the therapy in two selected quadrants. The material was collected for investigation. The periodontopathogens were cultured and identified. Two days after EMD-scaling root planing (SRP) was applied into the pockets. RESULTS In the group of patients under investigation before the EMD application the presence of P. gingivalis was found in 6 patients and P. intermedia in 8 patients. After root planing and EMD application no periodontopathogens were identified in those patients either in the periodontal pockets treated with EMD or in the periodontal pockets free from EMD (control). In the statistical analysis of changes in clinical indexes, the application of SRP and SRP combined with EMD was proved to significantly influence the improvement of the clinical state. However, no significant differences between the individual parameters were found in either group. CONCLUSIONS The SRP is an effective method of limiting the development of periopathogens in periodontal pockets. The non-surgical therapy with EMD does not change the clinical parameters significantly, compared with the SRP. Simultaneously, the application of EMD inhibits the development of periopathogens, such as Porphyromonas gingivalis and Prevotella.
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Voillet F, Charmensat O, Castanier M, Roch A, Papazian L. [Porphyromonas causing lung cavitation with empyema]. Ann Fr Anesth Reanim 2012; 31:573. [PMID: 22677062 DOI: 10.1016/j.annfar.2012.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 03/28/2012] [Indexed: 06/01/2023]
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20
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Sakagami H, Zhou L, Kawano M, Thet MM, Tanaka S, Machino M, Amano S, Kuroshita R, Watanabe S, Chu Q, Wang QT, Kanamoto T, Terakubo S, Nakashima H, Sekine K, Shirataki Y, Zhang CH, Uesawa Y, Mohri K, Kitajima M, Oizumi H, Oizumi T. Multiple biological complex of alkaline extract of the leaves of Sasa senanensis Rehder. In Vivo 2010; 24:735-743. [PMID: 20952742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Previous studies have shown anti-inflammatory potential of alkaline extract of the leaves of Sasa senanensis Rehder (SE). The aim of the present study was to clarity the molecular entity of SE, using various fractionation methods. SE inhibited the production of nitric oxide (NO), but not tumour necrosis factor-α by lipopolysaccharide (LPS)-stimulated mouse macrophage-like cells. Lignin carbohydrate complex prepared from SE inhibited the NO production to a comparable extent with SE, whereas chlorophyllin was more active. On successive extraction with organic solvents, nearly 90% of SE components, including chlorophyllin, were recovered from the aqueous layer. Anti-HIV activity of SE was comparable with that of lignin-carbohydrate complex, and much higher than that of chlorophyllin and n-butanol extract fractions. The CYP3A inhibitory activity of SE was significantly lower than that of grapefruit juice and chlorophyllin. Oral administration of SE slightly reduced the number of oral bacteria. When SE was applied to HPLC, nearly 70% of SE components were eluted as a single peak. These data suggest that multiple components of SE may be associated with each other in the native state or after extraction with alkaline solution.
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Affiliation(s)
- Hiroshi Sakagami
- Division of Pharmacology, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry, Sakado, Saitama 350-0283, Japan.
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Walters SM, Dubey VS, Jeffrey NR, Dixon DR. Antibiotic-induced Porphyromonas gingivalis LPS release and inhibition of LPS-stimulated cytokines by antimicrobial peptides. Peptides 2010; 31:1649-53. [PMID: 20541574 DOI: 10.1016/j.peptides.2010.06.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2010] [Revised: 06/01/2010] [Accepted: 06/01/2010] [Indexed: 11/25/2022]
Abstract
Bacterial lipopolysaccharide (LPS) release during periodontal infection is a significant component of periodontal disease. We hypothesized that some bacterial LPS release results from bacterial exposure to antibiotics. Therefore, we examined the ability of various classes of antibiotics to induce LPS release from Porphyromonas gingivalis as well as the ability of antimicrobial peptides (AMPs) to inhibit purified LPS. All antibiotics tested against P. gingivalis were able to liberate 1.9-12.9 times more LPS as compared to untreated bacteria. Among the three AMPs tested, LL-37 was found to be the most potent inhibitor of cytokine (tumor necrosis factor-alpha, interleukin-1beta, interleukin-6) production and completely neutralized purified P. ginigivalis LPS activity in the chromogenic limulus amebocyte lysate (LAL) and whole blood cytokine stimulation assays. These observations suggest that therapeutic approaches utilizing AMPs as adjuncts to neutralize released LPS should be considered.
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Affiliation(s)
- S M Walters
- Immunology and Microbiology Branch, US Army Dental and Trauma Research Detachment, Walter Reed Army Institute of Research, Great Lakes Naval Training Center, Great Lakes, IL 60088, USA
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Ji QX, Chen XG, Zhao QS, Liu CS, Cheng XJ, Wang LC. Injectable thermosensitive hydrogel based on chitosan and quaternized chitosan and the biomedical properties. J Mater Sci Mater Med 2009; 20:1603-1610. [PMID: 19322644 DOI: 10.1007/s10856-009-3729-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2008] [Accepted: 03/03/2009] [Indexed: 05/27/2023]
Abstract
A novel injectable thermosensitive hydrogel (CS-HTCC/alpha beta-GP) was successfully designed and prepared using chitosan (CS), quaternized chitosan (HTCC) and alpha,beta-glycerophosphate (alpha,beta-GP) without any additional chemical stimulus. The gelation point of CS-HTCC/alpha beta-GP can be set at a temperature close to normal body temperature or other temperature above 25 degrees C. The transition process can be controlled by adjusting the weight ratio of CS to HTCC, or different final concentration of alpha,beta-GP. The optimum formulation is (CS + HTCC) (2% w/v), CS/HTCC (5/1 w/w) and alpha,beta-GP 8.33% or 9.09% (w/v), where the sol-gel transition time was 3 min at 37 degrees C. The drug released over 3 h from the CS-HTCC/alpha,beta-GP thermosensitive hydrogel in artificial saliva pH 6.8. In addition, CS-HTCC/alpha,beta-GP thermosensitive hydrogel exhibited stronger antibacterial activity towards two periodontal pathogens (Porphyromonas gingivalis, P.g and Prevotella intermedia, P.i). CS-HTCC/alpha, beta-GP thermosensitive hydrogel was a considerable candidate as a local drug delivery system for periodontal treatment.
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Affiliation(s)
- Qiu Xia Ji
- College of Marine Life Science, Ocean University of China, Qingdao, Shandong Province, PR China
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23
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Richter GT, Smith JA, Dornhoffer JL. Otogenic cerebellar abscess: a case report. Ear Nose Throat J 2009; 88:E25-E28. [PMID: 19358116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
This case report describes the gradual deterioration of a healthy, highly functioning man who initially presented with a draining right ear. The patient's indolent neurologic decline and referral to an otologist ultimately led to the diagnosis and treatment of an otogenic cerebellar abscess, an increasingly rare intracranial complication of otitis media. We report this case to illustrate that severe complications of chronic otitis media still occur in the United States, to stress the importance of clinical suspicion in the postantibiotic era, and to review the literature regarding the most appropriate time to perform the otologic portion of the surgery.
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Affiliation(s)
- Gresham T Richter
- Department of Otolaryngology-Head and Neck Surgery, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
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24
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Hajishengallis G, Shakhatreh MAK, Wang M, Liang S. Complement receptor 3 blockade promotes IL-12-mediated clearance of Porphyromonas gingivalis and negates its virulence in vivo. J Immunol 2007; 179:2359-67. [PMID: 17675497 DOI: 10.4049/jimmunol.179.4.2359] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The ability of certain pathogens to exploit innate immune function allows them to undermine immune clearance and thereby increase their persistence and capacity to cause disease. Porphyromonas gingivalis is a major pathogen in periodontal disease and is associated with increased risk of systemic conditions. We have previously shown that the fimbriae of P. gingivalis interact with complement receptor 3 (CR3; CD11b/CD18) in monocytes/macrophages, resulting in inhibition of IL-12p70 production in vitro. The in vivo biological implications of this observation were investigated in this study using a CR3 antagonist (XVA143). XVA143 was shown to block CR3 binding of P. gingivalis fimbriae and reverse IL-12p70 inhibition; specifically, CR3 blockade resulted in inhibition of ERK1/2 phosphorylation and up-regulation of IL-12 p35 and p40 mRNA expression. Importantly, mice pretreated with XVA143 elicited higher IL-12p70 and IFN-gamma levels in response to P. gingivalis i.p. infection and displayed enhanced pathogen clearance, compared with similarly infected controls. The notion that CR3 is associated with reduced IL-12p70 induction and impaired P. gingivalis clearance was confirmed using i.p. infected wild-type and CR3-deficient mice. Moreover, XVA143 dramatically attenuated the persistence and virulence of P. gingivalis in experimental mouse periodontitis, as evidenced by reduced induction of periodontal bone loss. Therefore, CR3 blockade may represent a promising immunomodulatory approach for controlling human periodontitis and possibly associated systemic diseases.
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MESH Headings
- Alveolar Bone Loss/drug therapy
- Alveolar Bone Loss/genetics
- Alveolar Bone Loss/immunology
- Alveolar Bone Loss/metabolism
- Alveolar Bone Loss/microbiology
- Alveolar Bone Loss/pathology
- Animals
- Bacteroidaceae Infections/drug therapy
- Bacteroidaceae Infections/genetics
- Bacteroidaceae Infections/immunology
- Bacteroidaceae Infections/metabolism
- Bacteroidaceae Infections/pathology
- CD11b Antigen/genetics
- CD11b Antigen/immunology
- CD11b Antigen/metabolism
- CD18 Antigens/genetics
- CD18 Antigens/immunology
- CD18 Antigens/metabolism
- CHO Cells
- Cricetinae
- Cricetulus
- Disease Models, Animal
- Fimbriae, Bacterial/immunology
- Fimbriae, Bacterial/metabolism
- Gene Expression Regulation/drug effects
- Gene Expression Regulation/genetics
- Gene Expression Regulation/immunology
- Humans
- Interleukin-12 Subunit p35/biosynthesis
- Interleukin-12 Subunit p35/immunology
- Interleukin-12 Subunit p40/biosynthesis
- Interleukin-12 Subunit p40/immunology
- Macrophages, Peritoneal/immunology
- Macrophages, Peritoneal/metabolism
- Macrophages, Peritoneal/microbiology
- Macrophages, Peritoneal/pathology
- Mice
- Mice, Knockout
- Mitogen-Activated Protein Kinase 1/immunology
- Mitogen-Activated Protein Kinase 1/metabolism
- Mitogen-Activated Protein Kinase 3/immunology
- Mitogen-Activated Protein Kinase 3/metabolism
- Periodontitis/drug therapy
- Periodontitis/genetics
- Periodontitis/immunology
- Periodontitis/metabolism
- Periodontitis/microbiology
- Periodontitis/pathology
- Porphyromonas gingivalis/immunology
- Porphyromonas gingivalis/pathogenicity
- RNA, Messenger/biosynthesis
- RNA, Messenger/immunology
- Receptors, Complement/antagonists & inhibitors
- Receptors, Complement/deficiency
- Receptors, Complement/immunology
- Up-Regulation/drug effects
- Up-Regulation/genetics
- Up-Regulation/immunology
- Virulence/immunology
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Affiliation(s)
- George Hajishengallis
- Division of Oral Health and Systemic Disease/Department of Periodontics, University of Louisville Health Sciences Center, Louisville, KY 40292, USA.
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Stephan B, Greife HA, Pridmore A, Silley P. Mutant prevention concentration of pradofloxacin against Porphyromonas gingivalis. Vet Microbiol 2007; 121:194-5. [PMID: 17306474 DOI: 10.1016/j.vetmic.2007.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2006] [Revised: 01/04/2007] [Accepted: 01/08/2007] [Indexed: 11/30/2022]
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26
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Athanasiou S, Matthaiou DK, Falagas ME. Vaginal mesh infection due to Bacteroides melaninogenicus: a case report of another emerging foreign body related infection. ACTA ACUST UNITED AC 2007; 38:1108-10. [PMID: 17148089 DOI: 10.1080/00365540600664100] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
We present a case of a 29-y-old woman with rectocele, cystocele, and uterine prolapse who developed a vaginal infection after the placement of a macroporous polypropylene vaginal mesh. Bacteroides melaninogenicus was isolated from the area of the infection. The exposed parts of the mesh were removed and she received treatment with metronidazole and doxycycline. No recurrence of the infection was noted during 12 months of follow-up. However, the patient continued to avoid intercourse due to severe dyspareunia. Vaginal mesh-related infections represent an emerging type of infection that may complicate reconstructive surgery in patients with pelvic organ prolapse.
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Abstract
A 41-year-old man was provided with a jacket crown after a root end resection of a molar. Four months later, cortical destruction of the ulnar diaphysis with swelling and pain appeared in his forearm. No microorganism could be grown from an intraoperative tissue specimen, but bacterial 16S rRNA genes were detected by broad-range PCR, revealing Porphyromonas gingivalis as the causative agent of osteomyelitis.
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Affiliation(s)
- Heike Welkerling
- Department of Orthopaedic Surgery, Friedrich-Alexander University Erlangen-Nürnberg Rathsberger Strasse 57, 91054 Erlangen, Germany.
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28
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Rega AJ, Aziz SR, Ziccardi VB. Microbiology and antibiotic sensitivities of head and neck space infections of odontogenic origin. J Oral Maxillofac Surg 2006; 64:1377-80. [PMID: 16916672 DOI: 10.1016/j.joms.2006.05.023] [Citation(s) in RCA: 140] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2005] [Indexed: 10/24/2022]
Abstract
PURPOSE The purpose of this study is to assess the anatomical spaces and causative micro-organisms responsible for deep fascial space head and neck infections and evaluate the resistance of antibiotics used in the treatment of these infections. PATIENTS AND METHODS A 6-year retrospective study evaluated hospital records of 103 patients. All patients in this study underwent surgical incision and drainage, received IV antibiotics, and had culture and sensitivity performed. Patient demographics reviewed were gender, age, involved fascial space(s), micro-organisms identified and antibiotic resistance from culture and sensitivity testing. RESULTS There were 56 male (54%) and 47 (46%) female patients. The submandibular space was the most frequent location for a single space abscess (30%), followed by the buccal space (27.5%) and the lateral pharyngeal space (12.5%). Sixty-three patients presented with multiple space involvement, totaling 142 spaces involved. A total of 269 bacterial strains were isolated from 103 patients. The bacteria were found to be 63.5% gram-positive. Gram-positive cocci were isolated 57.7% of specimens and gram-negative rods were isolated in 33% of cultures. There were 178 aerobes (65.7%) and 91 anaerobes (34.3%) isolated. The most common bacteria isolated were Viridans streptococci, Provetella, Staphylococci, and Peptostreptococcus. Culture and sensitivities were reviewed on 101 patients. CONCLUSION Patients who underwent surgical incision and drainage in the operating room had a tendency for involvement of multiple space abscesses with the submandibular space, submental, and lateral pharyngeal spaces effected most frequently. Cultures and sensitivities commonly showed greater growth in aerobes (65.7%) than in anaerobes. Gram positive cocci and gram negative rods had the greatest growth percentage in cultures.
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Affiliation(s)
- Anthony J Rega
- Department of Oral and Maxillofacial Surgery, University of Medicine and Dentistry of New Jersey, Newark, NJ 07103-2400, USA
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29
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Pangsomboon K, Kaewnopparat S, Pitakpornpreecha T, Srichana T. Antibacterial activity of a bacteriocin from Lactobacillus paracasei HL32 against Porphyromonas gingivalis. Arch Oral Biol 2006; 51:784-93. [PMID: 16870131 DOI: 10.1016/j.archoralbio.2006.03.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2005] [Revised: 12/29/2005] [Accepted: 03/08/2006] [Indexed: 11/20/2022]
Abstract
Porphyromonas gingivalis infections cause problems in periodontal diseases and in certain systemic diseases. There is evidence that Lactobacillus spp. can control populations of P. gingivalis, but there are few data on the effects of purified bacteriocins from Lactobacillus paracasei HL32 on P. gingivalis. The objective of this study was to examine the antibacterial activity of a bacteriocin from L. paracasei HL32 and to relate this activity to its composition. A bacteriocin was purified from culture supernatants of Lactobacillus spp. using a dialysis technique followed by gel-permeation chromatography. Composition of the bacteriocin was characterised by ninhydrin tests, ultraviolet spectrophotometry, thin-layer chromatography, sodium-dodecyl sulphate-polyacrylamide gel electrophoresis, electrospray ionisation mass spectrometry and amino acid analysis. The amino acid sequence from the N-terminal of the bacteriocin was determined. Antibacterial activity was examined by the cylinder plate method, microtitre assay and scanning electron microscopy as compared with standard antibiotics. The bacteriocin had a molecular weight of approximately 56kDa, was comprised of 68% carbohydrate and 32% protein, and showed maximum peak absorbance at 214 and 254nm. The bacteriocin was found to be effective against P. gingivalis; it caused swelling and pore formation on the cell envelope at a minimum bactericidal concentration of 0.14mM, and caused death within 2h. Metronidazole killed P. gingivalis but did not affect the envelope, whereas tetracycline affected P. gingivalis with cell deformation. In conclusion, the bacteriocin from L. paracasei HL32 had the ability to kill P. gingivalis, suggesting that it could be a promising alternative chemotherapeutic agent for P. gingivalis infections.
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30
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Huits RMHG, van Assen S, Wildeboer-Veloo ACM, Verschuuren EAM, Koeter GH. Prevotella bivia necrobacillosis following infectious mononucleosis. J Infect 2006; 53:e59-63. [PMID: 16316686 DOI: 10.1016/j.jinf.2005.10.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2005] [Accepted: 10/18/2005] [Indexed: 10/25/2022]
Abstract
A case of Lemierre's syndrome is reported. Although Fusobacterium species are commonly associated with this presentation, Prevotella bivia was the causative micro-organism identified in this case. The finding that disseminated anaerobic sepsis followed primary EBV infection led to the construction of a hypothetical model of infection.
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Affiliation(s)
- R M H G Huits
- Department of Internal Medicine, University Medical Center Groningen, Postbus 30001, Hanzeplein 1, 9700 RB Groningen, The Netherlands.
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31
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Madan M, Bishayi B, Hoge M, Messas E, Amar S. Doxycycline affects diet- and bacteria-associated atherosclerosis in an ApoE heterozygote murine model: cytokine profiling implications. Atherosclerosis 2006; 190:62-72. [PMID: 16563401 DOI: 10.1016/j.atherosclerosis.2006.02.026] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2005] [Revised: 01/26/2006] [Accepted: 02/01/2006] [Indexed: 11/22/2022]
Abstract
BACKGROUND It has been postulated that systemic infection with pathogens such as Porphyromonas gingivalis (Pg) elevates the inflammatory response and increases susceptibility to atherosclerosis. We hypothesized that Doxycycline would be beneficial in diet- and/or Pg-induced atherosclerosis given its role in various cell functions and matrix remodeling. METHODS AND RESULTS ApoE+/- mice were inoculated weekly with Pg and treated with either Doxycycline or saline; animals were fed either a high-fat or chow diet. Animals were euthanized at 14 or 24 weeks and histomorphometric analysis of atheromatous lesions in proximal aorta, levels of SAA and serum cytokine profiling were performed. Histomorphometric analysis demonstrated that in non-infected mice fed a high fat diet, Doxycycline treatment resulted in a reduction of mean lesions from 10.5%+/-.49 to 1.09%+/-0.102 (p<0.05) at 14 weeks and a reduction from 21.5%+/-6.49 to 8.26%+/-0.162 (p=0.106) at 24 weeks. Chow-fed Pg mice treated with Doxyclycline also resulted in a reduction from 0.62%+/-0.128 to 0.0%+/-0.0 (p<0.05) at 14 weeks and a reduction from 0.92%+/-0.23 to 0.0%+/-0.0 (p<0.05) at 24 weeks. Administration of Doxycycline to mice fed a high fat diet and Pg-inoculated resulted in a reduction of mean percentage of atheromatous lesions from 16.46%+/-1.69 to 1.141%+/-0.23 (p<0.05) at 14 weeks and a reduction from 25.27%+/-1.734 to 0.428%+/-0.033 (p<0.05) at 24 weeks. At this timepoint, SAA levels in Pg-infected animals were reduced by five-fold and three-fold in Doxycycline-treated chow and high fat-diet groups, respectively. Cytokine antibody arrays revealed a marked reduction in the levels of pro-inflammatory cytokines in Doxycycline-treated groups whether Pg-infected or fed a high fat diet while anti-inflammatory cytokines were not affected. Consistent with the role of Doxycycline on matrix proteases, at 24 weeks MMP-9 Serum levels were markedly reduced by 60% (p<0.05) and 30% (p<0.05) with Doxycycline treatment in Pg-infected high fat and chow diet groups, respectively. CONCLUSIONS Doxycycline decreases pro-inflammatory cytokines and results in reduction of atherosclerosis in ApoE+/-Pg-inoculated and/or high fat diet fed mice.
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Affiliation(s)
- Monika Madan
- Department of Periodontology and Oral Biology, School of Dental Medicine, Boston University, Boston, MA 02118, USA
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32
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Leurent G, Vaquette B, Balde D, De La Tour B, Signouret T, Leclercq C, Mabo P. [Tamponade due to Porphyromonas gingivalis]. Arch Mal Coeur Vaiss 2006; 99:171-3. [PMID: 16555701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
A 45 year old man, 10 weeks after angioplasty and endoprosthesis insertion for myocardial infarction, developed tamponade in an infectious context. RNA 16S investigation, using the universal amplification method with ribotyping, detected Porphyromonas gingivalis (a strict anaerobic bacillus associated with peridontitis) in the pericardial fluid. This appears to be the first description of such a clinical scenario, and suggests 5 aetio-pathological mechanisms: fissure syndrome, malignant tamponade, post-infarction pericardial syndrome, endoprosthesis infection and infectious tamponade. We also describe the ribotyping method, which by amplifying DNA coding for RNA 16S allows identification of an increasing number of micro-organisms implicated in infectious pathology.
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Affiliation(s)
- G Leurent
- Département de cardiologie et maladies vasculaires, CHU Pontchaillou, 2, rue Henri le Guilloux, 35033 Rennes
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Abstract
Metronidazole resistance among Prevotella spp. is rare. We report here the first case of bacteremia due to a high-level metronidazole-resistant Prevotella sp. responsible for treatment failure.
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Affiliation(s)
- Francine Mory
- Laboratoire de Bactériologie, Centre Hopitalier, Neufchateau, France
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Abstract
To compare the frequencies, concentrations, and antimicrobial susceptibilities of vaginal microbes isolated from women with bacterial vaginosis (BV) before and after therapy, 119 nonpregnant women aged 18 to 45 with clinical and Gram stain evidence of BV were randomized to receive intravaginal clindamycin or metronidazole. Vaginal swabs were collected at baseline and 7 to 12 days, 35 to 45 days, and 70 to 90 days following therapy for quantitative vaginal culture. For the 99 women completing all four visits, statistical analyses were performed comparing differences in vaginal microflora between the two treatment arms and between visits in the same treatment group. Antimicrobial susceptibility testing using the agar dilution method was performed for anaerobic gram-negative rods. Although both therapies resulted in decreased colonization by Gardnerella vaginalis and Mycoplasma hominis, only metronidazole treatment resulted in a significant decrease in the frequency and concentration of Prevotella bivia and black-pigmented Prevotella species. Of the 865 anaerobic gram-negative rods evaluated for susceptibility, only 3 (0.3%) were resistant to metronidazole, whereas clindamycin resistance increased significantly for P. bivia and black-pigmented anaerobic gram-negative rods persisting following clindamycin therapy. Clindamycin-resistant subpopulations of P. bivia and black-pigmented Prevotella species emerged 7 to 12 days after therapy even among women colonized initially by clindamycin-susceptible strains. These resistant subpopulations persisted at high frequencies (42 to 50%) 70 to 90 days following therapy. The two topical agents for treatment of BV have differing microbiologic effects on the vaginal microflora. The emergence of clindamycin-resistant anaerobic gram-negative rods following therapy is of concern.
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Affiliation(s)
- M N Austin
- Magee-Womens Research Institute, Pittsburgh, PA 15213-3180, USA
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35
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Abstract
Endocarditis is a serious complication of injection drug use most commonly caused by Staphylococcus aureus. We report a case of tricuspid valve polymicrobial bacterial endocarditis in an injection drug user from 3 oral anaerobes: Actinomyces odontolytica, Veillonella species, and Prevotella melaninogenica. The patient was believed to have acquired these organisms from his habit of licking the needle in order to gauge the strength of the cocaine prior to injection. The patient was successfully treated with a 6-week course of penicillin G and metronidazole. This case demonstrates the importance of a detailed history in designing empiric therapy.
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Affiliation(s)
- Seunghee Oh
- University of Texas Medical Branch at Galveston, Galveston, TX, USA
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36
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Abstract
A case of 65-year-old male is reported who presented with myalgias, headache, and fever. He subsequently developed myocarditis and was diagnosed to have anaplasmosis on peripheral blood smear. He was treated with doxycycline for 30 days. A coronary angiogram done after recovery showed normal epicardial arteries. The case illustrates the importance of a careful examination of the peripheral smear, with a high index of clinical suspicion, which led to prompt treatment and complete recovery of the patient.
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Affiliation(s)
- Amyn Malik
- University of Minnesota, Minneapolis, Minn, USA.
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Abstract
BACKGROUND Aplastic anemia (AA) is a rare hematologic disease characterized by hypo-cellular bone marrow. The clinical features include fatigue, increased bruising, and gingival bleeding caused by anemia, leukopenia, and thrombocytopenia. A patient with AA is at high risk for infection because of leukopenia. The risk of systemic infection is especially high in AA patients with severe local infections, including periodontitis. Accordingly, periodontal treatment should include antibiotic prophylaxis to reduce the risk of systemic infection. However, treatment of periodontitis in the AA patient is significantly complicated by the bleeding disorder. We present a case report of the successful periodontal treatment of an AA patient with spontaneous gingival bleeding. METHODS The patient was closely monitored for platelet and neutrophil counts before every treatment. The patient's platelet count was always under 10,000/microl. Therefore, it was necessary to increase platelet counts to over 25,000/microl by transfusion, after which subgingival scaling with anesthesia was performed. When the neutrophil count was less than 2,000/microl, local minocycline chemotherapy was applied to the pockets. Periodontal infection was monitored by detection of bacterial DNA and measurement of serum immunoglobulin (Ig) G titer against periodontal bacteria. RESULTS Following the physical and chemical treatment, the gingival appearance improved dramatically and the spontaneous gingival bleeding disappeared. Moreover, the IgG titer against periodontal bacteria decreased to normal range and specific periodontal pathogens were no longer detectable in the tested pockets. CONCLUSION We believe that the treatment strategy in the present report provides new sight into treatment planning for severely medically compromised patients.
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Affiliation(s)
- Kosuke Oyaizu
- Department of Pathophysiology/Periodontal Science, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata-cho, Okayama 700-8525, Japan
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Ehmke B, Moter A, Beikler T, Milian E, Flemmig TF. Adjunctive Antimicrobial Therapy of Periodontitis: Long-Term Effects on Disease Progression and Oral Colonization. J Periodontol 2005; 76:749-59. [PMID: 15898936 DOI: 10.1902/jop.2005.76.5.749] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND This study assessed the long-term effects of adjunctive antimicrobial therapy on periodontal disease progression and oral colonization. METHODS Patients with previously untreated chronic periodontitis and subgingival Actinobacillus actinomycetemcomitans and/or Porphyromonas gingivalis were randomly assigned to subgingival scaling without (control group) or with systemic amoxicillin plus metronidazole and CHX irrigation (test group). Relative attachment levels were determined and subgingival and mucosal plaque samples were taken at baseline, at 10 days (plaque only) and at 3, 6, 9, 12, 18, and 24 months following initial therapy. During maintenance therapy, patients received supragingival debridement only. RESULTS After 24 months, the 18 test group patients showed at sites with initial probing depths (PD) > or =7 mm a significantly (P <0.05) higher frequency of 2 mm or more attachment gain (37.3% +/- 4.6%) and lower frequency of attachment loss (7.2% +/- 3.1%) compared to the 17 controls (8.2% +/- 3.9% and 19.1% +/- 13.1%, respectively). Compared to controls, the intraoral prevalence of A. actinomycetemcomitans (up to 18 months) and P. gingivalis (up to 3 months) decreased and that of Eikenella corrodens (at 10 days) increased in test patients (P <0.05). In both treatment groups, the detection frequency of Tannerella forsythensis decreased transiently, while an overall increase was recorded for Treponema ssp. CONCLUSIONS Over the 24-month period, a single course of the administered adjunctive antimicrobial therapy led to a relative risk reduction of 62% for attachment loss at deep sites. However, with the exception of A. actinomycetemcomitans, it failed to induce long-term changes in the prevalence profiles of oral colonization.
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Affiliation(s)
- Benjamin Ehmke
- Department of Periodontology, University of Münster, Münster, Germany.
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Abstract
A case of Lemierre's syndrome is reported in which metastatic abscesses resulted from septic thrombophlebitis of the internal jugular vein secondary to bacterial pharyngitis. A 32-year-old male suffering from a painful left-sided neck mass, sore throat, and fever was admitted to our hospital. Computed tomography revealed thrombosis of the left internal jugular vein, septic pulmonary emboli, and a liver abscess. Blood culture showed Porphyromonas asaccharolytica. Although empyema occurred transiently during the treatment, the patient recovered following prolonged antimicrobial therapy. Although Fusobacterium species are a well-known cause of Lemierre's syndrome, cases in whom Porphyromonas species was isolated have scarcely been reported. Moreover, case reports from Japan have been few.
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Affiliation(s)
- Shusuke Morizono
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka
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40
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Frat JP, Godet C, Grollier G, Blanc JL, Robert R. Cervical spinal epidural abscess and meningitis due to Prevotella oris and Peptostreptococcus micros after retropharyngeal surgery. Intensive Care Med 2004; 30:1695. [PMID: 15034651 DOI: 10.1007/s00134-004-2265-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2004] [Indexed: 12/01/2022]
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41
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Abstract
Both systemic and topical antibiotics are increasingly used in the management of periodontal infections. Whilst these drugs are used mostly on an empirical basis, some contend that rational use of antibiotics should be the norm due to their wide abuse and consequential global emergence of antibiotic resistance organisms. Here we review the rationale and principles of antimicrobial therapy, treatment goals, drug delivery routes and various antibiotics that are used in the management of periodontal diseases. The pros and cons of systemic and local antibiotic therapy are described together with practical guidelines for their delivery. The available data indicate, in general, that mechanical periodontal treatment alone is adequate to ameliorate or resolve the clinical condition in most cases, but adjunctive antimicrobial agents, delivered either locally or systemically, can enhance the effect of therapy in specific situations. This is particularly true for aggressive (early onset) periodontitis, in patients with generalised systemic disease that may affect host resistance and in case of poor response to conventional mechanical therapy. Locally delivered antibiotics together with mechanical debridement are indicated for non-responding sites of focal infection or in localised recurrent disease. After resolution of the periodontal infection, the patient should be placed on an individually tailored maintenance care programme. Optimal plaque control by the patient is of paramount importance for a favourable clinical and microbiological response to any form of periodontal therapy.
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42
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Abstract
Aggressive periodontitis is characterized by a considerable attachment loss over a relatively short period of time. It may be the consequence of either the presence of highly aggressive pathogens or a highly susceptible host. In the first case, the use of antimicrobials should be beneficial in the treatment of those patients. However, due to the organization of the micro-organisms as a biofilm, the increasing incidence of allergies and resistance against antimicrobials and their side-effects, there is still controversy about their benefit in the treatment of periodontal disease. This paper discusses indications for the use of antimicrobials, the substances prescribed and the type of application under the conditions of aggressive periodontitis.
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Affiliation(s)
- C E Dörfer
- Department Conservative Dentistry and Periodontology, University of Heidelberg, Heidelberg, Germany.
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43
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Affiliation(s)
- Itzhak Brook
- Department of Pediatrics, Georgetown University School of Medicine, Washington, DC, USA.
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44
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Gatignol JP, Poulet PP, Desse T, Duffaut D. Comparison of laboratory methods for detecting beta-lactamase-positive strains in the species Prevotella intermedia sensu lato isolated from periodontal pockets. Eur J Clin Microbiol Infect Dis 2003; 22:389-91. [PMID: 12783282 DOI: 10.1007/s10096-003-0938-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J P Gatignol
- Department of Oral Biology, School of Dental Medicine, Paul Sabatier University, Toulouse, France.
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45
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Yasin B, Pang M, Lehrer RI, Wagar EA. Activity of Novispirin G-10, a novel antimicrobial peptide against Chlamydia trachomatis and vaginosis-associated bacteria. Exp Mol Pathol 2003; 74:190-5. [PMID: 12710952 DOI: 10.1016/s0014-4800(02)00022-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We tested the activity of Novispirin G-10, a novel antimicrobial alpha-helical octadecapeptide structurally related to cathelicidins and other innate immunity peptides, against Chlamydia trachomatis serovars L2, D, and E and three organisms associated with bacterial vaginosis (BV). The peptide's activity against C. trachomatis was measured in 48-h shell vial assays with McCoy cell targets. Exposure to 100 micro g/ml of Novispirin G-10 reduced the infectivity of serovars D and E by 99.4-100% and serovar L2 by 91.7-99.1%. At the same concentration of 100 micro g/ml, Novispirin G-10 rapidly killed >99% of Mobiluncus curtisii, Gardnerella vaginalis, and Prevotella bivia, in standard colony-forming unit (CFU) assays. Given its simple structure and relative lack of cytotoxic and hemolytic activity, Novispirin G-10 may be a useful component of microbicide preparations designed to prevent chlamydial infection and/or remediate the abnormal vaginal flora associated with BV.
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Affiliation(s)
- B Yasin
- Department of Pathology and Laboratory Medicine, University of California at Los Angeles School of Medicine, Los Angeles, CA 90095-1731, USA
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46
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Dubreuil L, Behra-Miellet J, Vouillot C, Bland S, Sedallian A, Mory F. Beta-lactamase production in Prevotella and in vitro susceptibilities to selected beta-lactam antibiotics [corrected]. Int J Antimicrob Agents 2003; 21:267-73. [PMID: 12636990 DOI: 10.1016/s0924-8579(02)00352-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This study looked for beta-lactamase production in 100 Prevotella isolates. MICs were determined for amoxycillin, ticarcillin, amoxycillin+clavulanate, cephalothin, cefuroxime, cefixime, cefpodoxime and cefotaxime using the reference agar dilution method (standard M11 A4, NCCLS). Beta-lactamase activity was detected in 58 of the 100 isolates, 24 of 46 black-pigmented Provotella and 34 of 54 non-pigmented Prevotella. All beta-lactamase-negative strains were susceptible to all beta-lactam antibiotics with the exception of cefuroxime and cefixime. Overall, resistance rates of Prevotella strains were lower for ticarcillin (8%) and celefotaxime (12%) than for the other cephalosporins. All Prevotella isolates were susceptible to amoxycillin and were all inhibited by 2 mg/l or less amoxycillin [corrected].
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Affiliation(s)
- L Dubreuil
- Faculté de Pharmacie, 3 rue du Professeur Laguesse, BP83, Lille Cedex 59006, France.
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47
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Marcos Sánchez F, Albo Castaño I, Arbol Linde F, Celdrán Gil J. [Lung abscess caused by Prevotella oralis and Prevotella ruminicola in a HIV-positive patient]. An Med Interna 2003; 20:164-5. [PMID: 12756910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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48
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Abstract
The parotid gland is the salivary gland most commonly affected by inflammation. The most common pathogens associated with acute bacterial parotitis are Staphylococcus aureus and anaerobic bacteria. The predominant anaerobes include gram-negative bacilli (including pigmented Prevotella and Porphyromonas spp.), Fusobacterium spp., and Peptostreptococcus spp. Streptococcus spp. (including S. pneumoniae) and gram-negative bacilli (including Escherichia coli) have also been reported. Gram-negative organisms are often seen in hospitalized patients. Organisms less frequently found are Arachnia, Haemophilus influenzae, Klebsiella pneumoniae, Salmonella spp., Pseudomonas aeruginosa, Treponema pallidum, cat-scratch bacillus, and Eikenella corrodens. Mycobacterium tuberculosis and atypical mycobacteria are rare causes of parotitis. Therapy includes maintenance of hydration and administration of parenteral antimicrobial therapy. Once an abscess has formed surgical drainage is required. The choice of antimicrobial depends on the etiologic agent. Maintenance of good oral hygiene, adequate hydration, and early and proper therapy of bacterial infection of the oropharynx may reduce the occurrence of suppurative parotitis.
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Affiliation(s)
- Itzhak Brook
- Georgetown University School of Medicine, Washington, DC, USA.
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49
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Kuriyama T, Karasawa T, Nakagawa K, Nakamura S, Yamamoto E. Antimicrobial susceptibility of major pathogens of orofacial odontogenic infections to 11 beta-lactam antibiotics. Oral Microbiol Immunol 2002; 17:285-9. [PMID: 12354209 DOI: 10.1034/j.1399-302x.2002.170504.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this study, we evaluated the current effectiveness of 11 beta-lactam antibiotics for treatment of orofacial odontogenic infections by determining the antimicrobial susceptibility of the major pathogens. The antimicrobial susceptibilities of viridans streptococci (n = 47), Peptostreptococcus (n = 67), Porphyromonas (n = 18), Fusobacterium (n = 57), black-pigmented Prevotella (n = 59) and non-pigmented Prevotella (n = 47) isolated from pus specimens of 93 orofacial odontogenic infections to penicillin G, cefmetazole, flomoxef, cefoperazone, cefoperazone/sulbactam, ceftazidime, cefpirome, cefepime, cefoselis, imipenem and faropenem were determined using the agar dilution method. Penicillin G, most cephalosporins, imipenem and faropenem worked well against viridans streptococci, Peptostreptococcus, Porphyromonas and Fusobacterium. Penicillin G and most cephalosporins, including fourth-generation agents, were not effective against beta-lactamase-positive Prevotella, though they were effective against beta-lactamase-negative strains. Cefmetazole, cefoperazone/sulbactam, imipenem and faropenem expressed powerful antimicrobial activity against beta-lactamase-positive Prevotella. In conclusion, penicillins have the potential to be first-line agents in the treatment of orofacial odontogenic infections. Most of the other beta-lactam antibiotics, including fourth-generation cephalosporins, were not found to have greater effectiveness than penicillins. In contrast, cefmetazole, cefoperazone/sulbactam, imipenem and faropenem were found to have greater effectiveness than penicillins.
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Affiliation(s)
- T Kuriyama
- Department of Oral and Maxillofacial Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
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50
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Delima AJ, Karatzas S, Amar S, Graves DT. Inflammation and tissue loss caused by periodontal pathogens is reduced by interleukin-1 antagonists. J Infect Dis 2002; 186:511-6. [PMID: 12195378 DOI: 10.1086/341778] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2001] [Revised: 03/28/2002] [Indexed: 12/15/2022] Open
Abstract
Periodontal disease is a significant cause of tooth loss among adults. It is initiated by pathogenic bacteria, which trigger an inflammatory response that is effective in preventing significant microbial colonization of the gingival tissues. In some individuals, the reaction to bacteria may lead to an excessive host response, resulting in periodontal tissue destruction. Recent developments suggest that interleukin (IL)-1 genetic polymorphisms may identify certain individuals who have a predisposed susceptibility to periodontal breakdown and that elevated levels of IL-1 are found in individuals with periodontal disease. However, there is no direct evidence that IL-1 per se is responsible for the critical events that occur in periodontitis. We investigated the role of IL-1 in periodontal disease in a Macaca fascicularis primate model, using human soluble IL-1 receptor type I as a specific inhibitor. The results indicate that inhibition of IL-1 alone significantly reduces inflammation, connective tissue attachment loss, and bone resorption that are induced by periodontal pathogens.
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Affiliation(s)
- Andrew J Delima
- Department of Periodontology and Oral Biology, Boston University School of Dental Medicine, Massachusetts 02118, USA
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