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Wang S, Yan T, Zhang B, Chen Y, Li Z. Porphyromonas gingivalis Vaccine: Antigens and Mucosal Adjuvants. Vaccines (Basel) 2024; 12:619. [PMID: 38932348 PMCID: PMC11209493 DOI: 10.3390/vaccines12060619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/21/2024] [Accepted: 05/28/2024] [Indexed: 06/28/2024] Open
Abstract
Porphyromonas gingivalis (Pg), a Gram-negative anaerobic bacterium found in dental plaque biofilm within periodontal pockets, is the primary pathogenic microorganism responsible for chronic periodontitis. Infection by Pg significantly impacts the development and progression of various diseases, underscoring the importance of eliminating this bacterium for effective clinical treatment. While antibiotics are commonly used to combat Pg, the rise of antibiotic resistance poses a challenge to complete eradication. Thus, the prevention of Pg infection is paramount. Research suggests that surface antigens of Pg, such as fimbriae, outer membrane proteins, and gingipains, can potentially be utilized as vaccine antigens to trigger protective immune responses. This article overviews these antigens, discusses advancements in mucosal adjuvants (including immunostimulant adjuvants and vaccine-delivery adjuvants), and their application in Pg vaccine development. Furthermore, the review examines the advantages and disadvantages of different immune pathways and common routes of Pg vaccine immunization. By summarizing the current landscape of Pg vaccines, addressing existing challenges, and highlighting the potential of mucosal vaccines, this review offers new insights for the advancement and clinical implementation of Pg vaccines.
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Affiliation(s)
- Shuo Wang
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang 471003, China; (S.W.); (T.Y.); (B.Z.); (Y.C.)
| | - Tong Yan
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang 471003, China; (S.W.); (T.Y.); (B.Z.); (Y.C.)
| | - Bingtao Zhang
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang 471003, China; (S.W.); (T.Y.); (B.Z.); (Y.C.)
| | - Yixiang Chen
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang 471003, China; (S.W.); (T.Y.); (B.Z.); (Y.C.)
- Henan Engineering Research Center for Key Immunological Biomaterials, Luoyang Polytechnic, Luoyang 471000, China
| | - Zhitao Li
- College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang 471003, China; (S.W.); (T.Y.); (B.Z.); (Y.C.)
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Vaernewyck V, Arzi B, Sanders NN, Cox E, Devriendt B. Mucosal Vaccination Against Periodontal Disease: Current Status and Opportunities. Front Immunol 2021; 12:768397. [PMID: 34925337 PMCID: PMC8675580 DOI: 10.3389/fimmu.2021.768397] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/18/2021] [Indexed: 11/13/2022] Open
Abstract
Approximately 9 out of 10 adults have some form of periodontal disease, an infection-induced inflammatory disease of the tooth-supporting tissues. The initial form, gingivitis, often remains asymptomatic, but this can evolve into periodontitis, which is typically associated with halitosis, oral pain or discomfort, and tooth loss. Furthermore, periodontitis may contribute to systemic disorders like cardiovascular disease and type 2 diabetes mellitus. Control options remain nonspecific, time-consuming, and costly; largely relying on the removal of dental plaque and calculus by mechanical debridement. However, while dental plaque bacteria trigger periodontal disease, it is the host-specific inflammatory response that acts as main driver of tissue destruction and disease progression. Therefore, periodontal disease control should aim to alter the host's inflammatory response as well as to reduce the bacterial triggers. Vaccines may provide a potent adjunct to mechanical debridement for periodontal disease prevention and treatment. However, the immunopathogenic complexity and polymicrobial aspect of PD appear to complicate the development of periodontal vaccines. Moreover, a successful periodontal vaccine should induce protective immunity in the oral cavity, which proves difficult with traditional vaccination methods. Recent advances in mucosal vaccination may bridge the gap in periodontal vaccine development. In this review, we offer a comprehensive overview of mucosal vaccination strategies to induce protective immunity in the oral cavity for periodontal disease control. Furthermore, we highlight the need for additional research with appropriate and clinically relevant animal models. Finally, we discuss several opportunities in periodontal vaccine development such as multivalency, vaccine formulations, and delivery systems.
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Affiliation(s)
- Victor Vaernewyck
- Laboratory of Immunology, Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Boaz Arzi
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA, United States
- Veterinary Institute for Regenerative Cures (VIRC) School of Veterinary Medicine, University of California, Davis, CA, United States
| | - Niek N. Sanders
- Laboratory of Gene Therapy, Department of Veterinary and Biosciences, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Eric Cox
- Laboratory of Immunology, Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Bert Devriendt
- Laboratory of Immunology, Department of Translational Physiology, Infectiology and Public Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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Teng YTA. Protective and Destructive Immunity in the Periodontium: Part 2—T-cell-mediated Immunity in the Periodontium. J Dent Res 2016; 85:209-19. [PMID: 16498066 DOI: 10.1177/154405910608500302] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Based on the results of recent research in the field and Part 1 of this article (in this issue), the present paper will discuss the protective and destructive aspects of the T-cell-mediated adaptive immunity associated with the bacterial virulent factors or antigenic determinants during periodontal pathogenesis. Attention will be focused on: (i) osteoimmunology and periodontal disease; (ii) some molecular techniques developed and applied to identify critical microbial virulence factors or antigens associated with host immunity (with Actinobacillus actinomycetemcomitans and Porphyromonas gingivalis as the model species); and (iii) summarizing the identified virulence factors/antigens associated with periodontal immunity. Thus, further understanding of the molecular mechanisms of the host’s T-cell-mediated immune responses and the critical microbial antigens related to disease pathogenesis will facilitate the development of novel therapeutics or protocols for future periodontal treatments. Abbreviations used in the paper are as follows: A. actinomycetemcomitans ( Aa), Actinobacillus actinomycetemcomitans; Ab, antibody; DC, dendritic cells; mAb, monoclonal antibody; pAb, polyclonal antibody; OC, osteoclast; PAMP, pathogen-associated molecular patterns; P. gingivalis ( Pg), Porphyromonas gingivalis; RANK, receptor activator of NF-κB; RANKL, receptor activator of NF-κB ligand; OPG, osteoprotegerin; TCR, T-cell-receptors; TLR, Toll-like receptors.
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Affiliation(s)
- Y-T A Teng
- Laboratory of Molecular Microbial Immunity, Eastman Department of Dentistry, Eastman Dental Center, Box-683, 625 Elmwood Ave., Rochester, NY 14620, USA.
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Nakao R, Takashiba S, Kosono S, Yoshida M, Watanabe H, Ohnishi M, Senpuku H. Effect of Porphyromonas gingivalis outer membrane vesicles on gingipain-mediated detachment of cultured oral epithelial cells and immune responses. Microbes Infect 2014; 16:6-16. [DOI: 10.1016/j.micinf.2013.10.005] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 10/07/2013] [Accepted: 10/08/2013] [Indexed: 01/27/2023]
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Zhu C, Yang J, Sun J, Shi J, Gou J, Li A. Induction of immune response and prevention of alveolar bone loss with recombinant Porphyromonas gingivalis peptidylarginine deiminase. Arch Oral Biol 2013; 58:1777-83. [PMID: 24200304 DOI: 10.1016/j.archoralbio.2013.09.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 09/10/2013] [Accepted: 09/24/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVE Treatments for periodontitis are not absolutely perfect, and a vaccine against Porphyromonas gingivalis (P. gingivalis) could become a valuable adjunct therapy for periodontitis. DESIGN In this study, a vaccine of peptidylarginine deiminase (PAD) from P. gingivalis was evaluated in P. gingivalis-induced murine lesion and periodontitis models. The prevention of alveolar bone loss analysis determined by micro-computed X-ray tomography (micro-CT), and histological assays. Furthermore, the induction of immune response of mouse anti-PAD done with ELISA and Western Blot analysis. RESULTS Compared with animal immunization with incomplete Freund's adjuvant (IFA) alone, PAD group significantly inhibited (P<0.05) bone resorption. ELISA and Western Blot showed that PAD induced response involving immunoglobulin G1 (Ig G1) predominantly. CONCLUSIONS These results suggest that PAD could be a candidate antigen for a vaccine against P. gingivalis infection.
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Affiliation(s)
- Chunhui Zhu
- Department of Periodontology, Stomatological Hospital, College of Medicine, Xi'an Jiaotong University, Shaanxi 710004, China
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Reyes L, Eiler-McManis E, Rodrigues PH, Chadda AS, Wallet SM, Bélanger M, Barrett AG, Alvarez S, Akin D, Dunn WA, Progulske-Fox A. Deletion of lipoprotein PG0717 in Porphyromonas gingivalis W83 reduces gingipain activity and alters trafficking in and response by host cells. PLoS One 2013; 8:e74230. [PMID: 24069284 PMCID: PMC3772042 DOI: 10.1371/journal.pone.0074230] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 07/29/2013] [Indexed: 01/10/2023] Open
Abstract
P. gingivalis (Pg), a causative agent of chronic generalized periodontitis, has been implicated in promoting cardiovascular disease. Expression of lipoprotein gene PG0717 of Pg strain W83 was found to be transiently upregulated during invasion of human coronary artery endothelial cells (HCAEC), suggesting this protein may be involved in virulence. We characterized the virulence phenotype of a PG0717 deletion mutant of pg W83. There were no differences in the ability of W83Δ717 to adhere and invade HCAEC. However, the increased proportion of internalized W83 at 24 hours post-inoculation was not observed with W83∆717. Deletion of PG0717 also impaired the ability of W83 to usurp the autophagic pathway in HCAEC and to induce autophagy in Saos-2 sarcoma cells. HCAEC infected with W83Δ717 also secreted significantly greater amounts of MCP-1, IL-8, IL-6, GM-CSF, and soluble ICAM-1, VCAM-1, and E-selectin when compared to W83. Further characterization of W83Δ717 revealed that neither capsule nor lipid A structure was affected by deletion of PG0717. Interestingly, the activity of both arginine (Rgp) and lysine (Kgp) gingipains was reduced in whole-cell extracts and culture supernatant of W83Δ717. RT-PCR revealed a corresponding decrease in transcription of rgpB but not rgpA or kgp. Quantitative proteome studies of the two strains revealed that both RgpA and RgpB, along with putative virulence factors peptidylarginine deiminase and Clp protease were significantly decreased in the W83Δ717. Our results suggest that PG0717 has pleiotropic effects on W83 that affect microbial induced manipulation of host responses important for microbial clearance and infection control.
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Affiliation(s)
- Leticia Reyes
- Department of Oral Biology, College of Dentistry and Center for Molecular Microbiology, Gainesville, Florida, United States of America
| | - Eileen Eiler-McManis
- Department of Oral Biology, College of Dentistry and Center for Molecular Microbiology, Gainesville, Florida, United States of America
| | - Paulo H. Rodrigues
- Department of Oral Biology, College of Dentistry and Center for Molecular Microbiology, Gainesville, Florida, United States of America
| | - Amandeep S. Chadda
- Department of Oral Biology, College of Dentistry and Center for Molecular Microbiology, Gainesville, Florida, United States of America
| | - Shannon M. Wallet
- Department of Oral Biology, College of Dentistry and Center for Molecular Microbiology, Gainesville, Florida, United States of America
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, Florida, United States of America
| | - Myriam Bélanger
- Department of Oral Biology, College of Dentistry and Center for Molecular Microbiology, Gainesville, Florida, United States of America
| | - Amanda G. Barrett
- Department of Oral Biology, College of Dentistry and Center for Molecular Microbiology, Gainesville, Florida, United States of America
| | - Sophie Alvarez
- Donald Danforth Plant Science Center, proteomics & mass spectrometry Core, St. Louis, Missouri, United States of America
| | - Debra Akin
- Department of Anatomy and Cell Biology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - William A. Dunn
- Department of Anatomy and Cell Biology, College of Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Ann Progulske-Fox
- Department of Oral Biology, College of Dentistry and Center for Molecular Microbiology, Gainesville, Florida, United States of America
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Bélanger M, Kozarov E, Song H, Whitlock J, Progulske-Fox A. Both the unique and repeat regions of the Porphyromonas gingivalis hemagglutin A are involved in adhesion and invasion of host cells. Anaerobe 2012; 18:128-34. [PMID: 22100486 PMCID: PMC3278541 DOI: 10.1016/j.anaerobe.2011.10.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 10/07/2011] [Accepted: 10/29/2011] [Indexed: 12/22/2022]
Abstract
Porphyromonas gingivalis is one of the major etiologic agents of adult periodontitis and has been associated with cardiovascular diseases. It expresses multiple hemagglutinins that are significant virulence factors and play an important role in bacterial attachment and invasion of host cells. The objective of this study was to determine the impact of P. gingivalis hemagglutinin A (HagA) on the attachment to and invasion of human coronary artery endothelial cells (HCAEC) and gingival epithelial cells (GEC). Bacterial strains expressing the HagA protein (or subunits), including Escherichia coli carrying plasmid pEKS5, E. coli carrying plasmid ST2, and Salmonella enterica serovar Typhimurium with plasmid pNM1.1 were used in this study. The strains were tested for their ability to attach to and invade HCAEC and GEC using antibiotic protection assays. In addition, the unique 5' N-terminal non-repeated segment of HagA was purified in recombinant form and a monoclonal antibody was created against the polypeptide. The monoclonal antibody against the unique portion of HagA was tested for inhibitory activity in these assays. The attachment of both E. coli strains expressing HagA fragment to host cells was significantly increased compared to their respective controls. However, they did not invade GEC or HCAEC. Interestingly, HagA expression in the Salmonella strain increased both adherence to and invasion of HCAEC, which may be due to the presence of the entire hagA ORF. A monoclonal antibody against the unique 5' N-terminal portion of HagA reduced invasion. Further experiments are needed to determine the role of the unique and the repeat segments of P. gingivalis HagA.
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Affiliation(s)
- Myriam Bélanger
- University of Florida, Center for Molecular Microbiology and Department of Oral Biology, Box 100424, Gainesville, FL 32610-0424, USA
| | - Emil Kozarov
- University of Florida, Center for Molecular Microbiology and Department of Oral Biology, Box 100424, Gainesville, FL 32610-0424, USA
| | - Hong Song
- University of Florida, Center for Molecular Microbiology and Department of Oral Biology, Box 100424, Gainesville, FL 32610-0424, USA
| | - Joan Whitlock
- University of Florida, Center for Molecular Microbiology and Department of Oral Biology, Box 100424, Gainesville, FL 32610-0424, USA
| | - Ann Progulske-Fox
- University of Florida, Center for Molecular Microbiology and Department of Oral Biology, Box 100424, Gainesville, FL 32610-0424, USA
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Nasal immunization with a fusion protein consisting of the hemagglutinin A antigenic region and the maltose-binding protein elicits CD11c(+) CD8(+) dendritic cells for induced long-term protective immunity. Infect Immun 2010; 79:895-904. [PMID: 21115722 DOI: 10.1128/iai.01203-10] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We assessed the efficacy of a fusion protein consisting of the 25-kDa antigenic region of Porphyromonas gingivalis hemagglutinin A and the Escherichia coli maltose-binding protein (25k-hagA-MBP) as a nasal vaccine for the prevention of oral infection with P. gingivalis. Nasal immunization with 25k-hagA-MBP induced high levels of 25k-hagA-specific serum IgG, serum IgA, and salivary IgA antibodies in a Toll-like receptor 4 (TLR4)-dependent manner. These antibody responses were maintained for at least 1 year after immunization. Analysis of cytokine responses showed that nasal administration of 25k-hagA-MBP induced antigen-specific CD4(+) T cells producing interleukin 4 (IL-4) and IL-5, but not gamma interferon (IFN-γ), in the spleen and cervical lymph nodes (CLNs). Furthermore, increased numbers of CD11c(+) CD8α(+), but not CD11c(+) CD11b(+) or CD11c(+) B220(+), dendritic cells with upregulated expression of CD80, CD86, CD40, and major histocompatibility complex class II (MHC II) molecules were noted in the spleen, CLNs, and nasopharynx-associated lymphoreticular tissues (NALT). Interestingly, when 25k-hagA-MBP or cholera toxin (CT) was given intranasally to enable examination of their presence in neuronal tissues, the amounts of 25k-hagA-MBP were significantly lower than those of CT. Importantly, mice given 25k-hagA-MBP nasally showed a significant reduction in alveolar bone loss caused by oral infection with P. gingivalis, even 1 year after the immunization. These results suggest that 25k-hagA-MBP administered nasally would be an effective and safe mucosal vaccine against P. gingivalis infection and may be an important tool for the prevention of chronic periodontitis in humans.
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Sharma DCG, Prasad SBM, Karthikeyan BV. Vaccination against periodontitis: the saga continues. Expert Rev Vaccines 2007; 6:579-90. [PMID: 17669011 DOI: 10.1586/14760584.6.4.579] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Periodontal disease can be considered to be one of the most common chronic inflammatory diseases inflicting humans. With the advent of advanced molecular diagnostic techniques, a better understanding of the role of specific pathogens and the contributory role of the host immune response in the initiation and progression of periodontal disease has been possible - although not completely. However, successful vaccine development that fully utilizes the current level of understanding has not yet occurred for human use. This paper reviews various in vitro, animal studies and human trials undertaken to develop a vaccine against periodontal disease, with emphases on the shortfalls of these efforts and future prospects of developing a successful vaccine against periodontal disease.
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Affiliation(s)
- Dileep C G Sharma
- Department of Periodontics, KGF College of Dental Sciences, Kolar Gold Fields, Karnataka, India.
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Tezuka A, Hamajima S, Hatta H, Abiko Y. Inhibition of Porphyromonas gingivalis hemagglutinating activity by IgY against a truncated HagA. J Oral Sci 2007; 48:227-32. [PMID: 17220621 DOI: 10.2334/josnusd.48.227] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Porphyromonas gingivalis has been implicated as an important pathogen in the development of periodontitis. Hemagglutinins have been identified as important adhesion molecules, allowing Porphyromonas gingivalis to adhere to gingival tissue cells, and to attach and lyse erythrocytes in order to uptake Fe ions as essential nutrition. One hemagglutinin, hemagglutinin A (HagA), has been molecularly cloned via functional screening for hemagglutinating activity. We previously cloned the gene encoding the 200-kDa cell-surface antigenic protein that was reacted by sera from periodontitis patients and was identified as a truncated protein of HagA by nucleotide sequence analysis. We further subcloned the gene encoding an 122-kDa protein (122k-HagA) which is a fusion protein composed of an 80-kDa truncated HagA containing the functional motif PVQNLT and a 42-kDa maltose binding protein. Passive immunization against infectious pathogens by specific antibodies produced from hen egg yolk antibody (IgY) has been extensively developed. In the present study, to develop passive immunotherapy against periodontal disease, we purified the recombinant 122k-HagA and used this to immunize hens and produce IgY. The purified IgY reacted with the recombinant 122k-HagA and the synthetic peptide containing PVQNLT, and inhibited hemagglutinating activity of Porphyromonas gingivalis. Thus, the novel IgY may be useful in the development of a passive immunization against periodontal diseases caused by P. gingivalis infection.
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Affiliation(s)
- Akihide Tezuka
- Department of Biochemistry and Molecular Biology, Nihon University School of Dentistry at Matsudo, Chiba, Japan
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Kobayashi T, Kaneko S, Tahara T, Hayakawa M, Abiko Y, Yoshie H. Antibody responses to Porphyromonas gingivalis hemagglutinin A and outer membrane protein in chronic periodontitis. J Periodontol 2006; 77:364-9. [PMID: 16512750 DOI: 10.1902/jop.2006.050138] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Hemagglutinin and outer membrane protein (OMP) are major virulence factors associated with colonization of Porphyromonas gingivalis in the gingival crevice. The genes for the 200-kDa antigenic protein (200-kDa AP) and 40-kDa OMP of P. gingivalis have been successfully cloned. Additionally, the 200-kDa AP gene has been shown to constitute the hemagglutinin A (hagA) gene of P. gingivalis. Therefore, this study was constructed to evaluate the distributions and serum levels of immnoglobulin G (IgG) antibodies specific for 200-kDa AP and 40-kDa OMP in periodontitis patients. METHODS Fifty patients with chronic periodontitis and 59 controls without periodontal destruction were enrolled in this study. We cloned the genes for 200-kDa AP and 40-kDa OMP from P. gingivalis and constructed the purified recombinant proteins. Serum levels of IgG subclass antibodies specific for both recombinant 200-kDa and 40-kDa OMP were determined in patients and controls by an enzyme-linked immunosorbent assay (ELISA). RESULTS The serum IgG subclass distribution for patients and controls was IgG1>IgG4>IgG2>IgG3 in the anti-200-kDa AP response, which was almost identical to that in the anti-40-kDa OMP response. The patient group showed significantly higher serum IgG responses to the 40-kDa OMP than the control group (P<0.01). In contrast, IgG subclass responses to the 200-kDa AP were not different between the patients and controls. Serum levels of antibodies reactive with both 200-kDa and 40-kDa proteins did not have a significant association with mean probing depth. CONCLUSION These results suggested that serum IgG responses against P. gingivalis OMP rather than the hagA may be more active in chronic periodontitis.
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Affiliation(s)
- Tetsuo Kobayashi
- Department of Oral Biological Science, Niigata University Graduate School of Medical and Dental Sciences, and General Dentistry and Clinical Education Unit, Niigata University Medical and Dental Hospital, Niigata, Japan.
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Antigen Delivery Systems II: Development of Live Recombinant Attenuated Bacterial Antigen and DNA Vaccine Delivery Vector Vaccines. Mucosal Immunol 2005. [DOI: 10.1016/b978-012491543-5/50060-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Suyama T, Hayakawa M, Abiko Y. Subcloning of the 200-kDa Porphyromonas gingivalis antigen gene and inhibition of hemagglutination by an antibody against the recombinant protein. J Oral Sci 2004; 46:163-9. [PMID: 15508749 DOI: 10.2334/josnusd.46.163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Porphyromonas gingivalis is a major etiologic agent of periodontitis and exhibits hemagglutinating and adherence activities. We previously succeeded in molecular cloning the 200-kDa cell-surface antigenic protein (200-k AP), designated pMD101, that is recognized in sera from periodontitis patients, and identified the 200-k AP as a hemagglutinin A (HagA) derivative. HagA is one of the hemagglutinins known to be a useful vaccine against periodontitis. HagA has four large, contiguous, direct repeats and the repeat unit is believed to contain the hemagglutinin domain. Because production of 200-k AP was low in the Escherichia coli host, it was difficult to obtain large amounts of recombinant protein. In this study, we attempt to subclone the gene encoding the useful antigen from pMD101 in an effort to obtain large quantities. A subclone, designated pMD160, encoding a fusion protein of 80-kDa HagA and maltose-binding protein was successfully constructed, and the novel clone produced relatively large amounts of recombinant protein. DNA nucleotide sequences of the pMD160 insert demonstrated that the 80-kDa protein contained a short hemagglutinin motif and a direct repeat unit region. The recombinant protein was purified to homogeneity and rabbit antiserum was raised. The antibody was capable of inhibiting the hemagglutinating activity of P. gingivalis. These findings suggest that novel 80-kDa HagA derivative proteins can be produced efficiently from E. coli hosts and these may be useful in developing immunotherapy against periodontitis infected by P. gingivalis.
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Affiliation(s)
- Tsutomu Suyama
- Departments of Biochemistry, Nihon University School of Dentistry at Matsudo, Chiba, Japan
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Higashi MK, Veenstra DL, del Aguila M, Hujoel P. The cost-effectiveness of interleukin-1 genetic testing for periodontal disease. J Periodontol 2002; 73:1474-84. [PMID: 12546098 DOI: 10.1902/jop.2002.73.12.1474] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND A genetic test for a composite interleukin-1 (IL-1) genotype is being marketed to predict risk for progression of periodontal disease. The objective of this study was to determine the clinical scenario required to produce cost-effective results with the use of IL-1 testing to identify high-risk patients. METHODS A disease simulation model was developed using decision-analytic techniques and a 30-year time frame. RESULTS Using different modeling scenarios, the genetic test produced results ranging from cost savings of $830,140 and 52.8 fewer cases of severe periodontitis to increased costs of $300,430 and 3.6 additional cases of severe periodontitis (per 1,000 patients). Three parameters in the analysis were highly influential: 1) the compliance rate for maintenance therapy in test positive versus non-tested patients; 2) the effectiveness of non-surgical therapy; and 3) the relative risk of disease progression for test positive patients. CONCLUSION The model produced a wide range of outcomes reflecting our incomplete understanding of the biology, optimal treatment, and genetic susceptibility of periodontal diseases. However, the model demonstrates that three clinical parameters are highly influential in determining if IL-1 testing can be implemented in a primary care setting in a cost-effective manner.
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Affiliation(s)
- Mitchell K Higashi
- Pharmaceutical Outcomes Research & Policy Program, University of Washington, Seattle 98195-7630, USA
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Determination of Short Peptide in a Porphyromonas gingivalis Protein Antigen Recognized by Sera from Periodontitis Patients. ACTA ACUST UNITED AC 2002. [DOI: 10.5466/ijoms.1.79] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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