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Nagasawa Y, Nomura R, Misaki T, Ito S, Naka S, Wato K, Okunaka M, Watabe M, Fushimi K, Tsuzuki K, Matsumoto-Nakano M, Nakano K. Relationship between IgA Nephropathy and Porphyromonas gingivalis; Red Complex of Periodontopathic Bacterial Species. Int J Mol Sci 2021; 22:13022. [PMID: 34884826 PMCID: PMC8657970 DOI: 10.3390/ijms222313022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/22/2021] [Accepted: 11/27/2021] [Indexed: 12/30/2022] Open
Abstract
IgA nephropathy (IgAN) has been considered to have a relationship with infection in the tonsil, because IgAN patients often manifest macro hematuria just after tonsillitis. In terms of oral-area infection, the red complex of periodontal bacteria (Porphyromonas gingivalis (P. gingivalis), Treponema denticol (T. denticola) and Tannerella forsythia (T. forsythia)) is important, but the relationship between these bacteria and IgAN remains unknown. In this study, the prevalence of the red complex of periodontal bacteria in tonsil was compared between IgAN and tonsillitis patients. The pathogenicity of IgAN induced by P. gingivalis was confirmed by the mice model treated with this bacterium. The prevalence of P. gingivalis and T. forsythia in IgAN patients was significantly higher than that in tonsillitis patients (p < 0.001 and p < 0.05, respectively). A total of 92% of tonsillitis patients were free from red complex bacteria, while only 48% of IgAN patients had any of these bacteria. Nasal administration of P. gingivalis in mice caused mesangial proliferation (p < 0.05 at days 28a nd 42; p < 0.01 at days 14 and 56) and IgA deposition (p < 0.001 at day 42 and 56 after administration). Scanning-electron-microscopic observation revealed that a high-density Electron-Dense Deposit was widely distributed in the mesangial region in the mice kidneys treated with P. gingivalis. These findings suggest that P. gingivalis is involved in the pathogenesis of IgAN.
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Affiliation(s)
- Yasuyuki Nagasawa
- Department of Internal Medicine, Division of Kidney and Dialysis, Hyogo College of Medicine, Nishinomiya 663-8501, Hyogo, Japan
| | - Ryota Nomura
- Department of Pediatric Dentistry, Division of Oral infection and Disease Control, Osaka University Graduate School of Dentistry, Suita 565-0871, Osaka, Japan; (K.W.); (K.N.)
| | - Taro Misaki
- Division of Nephrology, Seirei Hamamatsu General Hospital, Shizuoka 430-8558, Hamamatsu, Japan;
- Department of Nursing, Faculty of Nursing, Seirei Christopher University, Shizuoka 433-8558, Hamamatsu, Japan
| | - Seigo Ito
- Department of Internal medicine, Japan Self-Defense Gifu Hospital, Gifu 502-0817, Kakamigahara, Japan;
| | - Shuhei Naka
- Department of Pediatric Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8525, Okayama, Japan; (S.N.); (M.M.-N.)
| | - Kaoruko Wato
- Department of Pediatric Dentistry, Division of Oral infection and Disease Control, Osaka University Graduate School of Dentistry, Suita 565-0871, Osaka, Japan; (K.W.); (K.N.)
| | - Mieko Okunaka
- Department of Otolaryngology, Meiwa Hospital, Nishinomiya 663-8186, Hyogo, Japan; (M.O.); (M.W.); (K.F.)
| | - Maiko Watabe
- Department of Otolaryngology, Meiwa Hospital, Nishinomiya 663-8186, Hyogo, Japan; (M.O.); (M.W.); (K.F.)
| | - Katsuya Fushimi
- Department of Otolaryngology, Meiwa Hospital, Nishinomiya 663-8186, Hyogo, Japan; (M.O.); (M.W.); (K.F.)
- Department of Otorhinolaryngology, Head and Neck Surgery, Hyogo College of Medicine, Nishinomiya 663-8501, Hyogo, Japan;
| | - Kenzo Tsuzuki
- Department of Otorhinolaryngology, Head and Neck Surgery, Hyogo College of Medicine, Nishinomiya 663-8501, Hyogo, Japan;
| | - Michiyo Matsumoto-Nakano
- Department of Pediatric Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8525, Okayama, Japan; (S.N.); (M.M.-N.)
| | - Kazuhiko Nakano
- Department of Pediatric Dentistry, Division of Oral infection and Disease Control, Osaka University Graduate School of Dentistry, Suita 565-0871, Osaka, Japan; (K.W.); (K.N.)
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Zwickl NF, Stralis-Pavese N, Schäffer C, Dohm JC, Himmelbauer H. Comparative genome characterization of the periodontal pathogen Tannerella forsythia. BMC Genomics 2020; 21:150. [PMID: 32046654 PMCID: PMC7014623 DOI: 10.1186/s12864-020-6535-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 01/23/2020] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Tannerella forsythia is a bacterial pathogen implicated in periodontal disease. Numerous virulence-associated T. forsythia genes have been described, however, it is necessary to expand the knowledge on T. forsythia's genome structure and genetic repertoire to further elucidate its role within pathogenesis. Tannerella sp. BU063, a putative periodontal health-associated sister taxon and closest known relative to T. forsythia is available for comparative analyses. In the past, strain confusion involving the T. forsythia reference type strain ATCC 43037 led to discrepancies between results obtained from in silico analyses and wet-lab experimentation. RESULTS We generated a substantially improved genome assembly of T. forsythia ATCC 43037 covering 99% of the genome in three sequences. Using annotated genomes of ten Tannerella strains we established a soft core genome encompassing 2108 genes, based on orthologs present in > = 80% of the strains analysed. We used a set of known and hypothetical virulence factors for comparisons in pathogenic strains and the putative periodontal health-associated isolate Tannerella sp. BU063 to identify candidate genes promoting T. forsythia's pathogenesis. Searching for pathogenicity islands we detected 38 candidate regions in the T. forsythia genome. Only four of these regions corresponded to previously described pathogenicity islands. While the general protein O-glycosylation gene cluster of T. forsythia ATCC 43037 has been described previously, genes required for the initiation of glycan synthesis are yet to be discovered. We found six putative glycosylation loci which were only partially conserved in other bacteria. Lastly, we performed a comparative analysis of translational bias in T. forsythia and Tannerella sp. BU063 and detected highly biased genes. CONCLUSIONS We provide resources and important information on the genomes of Tannerella strains. Comparative analyses enabled us to assess the suitability of T. forsythia virulence factors as therapeutic targets and to suggest novel putative virulence factors. Further, we report on gene loci that should be addressed in the context of elucidating T. forsythia's protein O-glycosylation pathway. In summary, our work paves the way for further molecular dissection of T. forsythia biology in general and virulence of this species in particular.
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Affiliation(s)
- Nikolaus F. Zwickl
- Department of Biotechnology, Institute of Computational Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Nancy Stralis-Pavese
- Department of Biotechnology, Institute of Computational Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Christina Schäffer
- Department of NanoBiotechnology, NanoGlycobiology unit, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Juliane C. Dohm
- Department of Biotechnology, Institute of Computational Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
| | - Heinz Himmelbauer
- Department of Biotechnology, Institute of Computational Biology, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria
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Chinthamani S, Settem RP, Honma K, Kay JG, Sharma A. Macrophage inducible C-type lectin (Mincle) recognizes glycosylated surface (S)-layer of the periodontal pathogen Tannerella forsythia. PLoS One 2017; 12:e0173394. [PMID: 28264048 PMCID: PMC5338828 DOI: 10.1371/journal.pone.0173394] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [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: 11/29/2016] [Accepted: 02/20/2017] [Indexed: 01/11/2023] Open
Abstract
The oral pathogen Tannerella forsythia is implicated in the development of periodontitis, a common inflammatory disease that leads to the destruction of the gum and tooth supporting tissues, often leading to tooth loss. T. forsythia is a unique Gram-negative organism endowed with an elaborate protein O-glycosylation system that allows the bacterium to express a glycosylated surface (S)-layer comprising two high molecular weight glycoproteins modified with O-linked oligosaccharides. The T. forsythia S-layer has been implicated in the modulation of cytokine responses of antigen presenting cells, such as macrophages, that play a significant role during inflammation associated with periodontitis. The macrophage-inducible C-type lectin receptor (Mincle) is an FcRγ-coupled pathogen recognition receptor that recognizes a wide variety of sugar containing ligands from fungal and bacterial pathogens. In this study, we aimed to determine if Mincle might be involved in the recognition of T. forsythia S-layer and modulation of cytokine response of macrophages against the bacterium. Binding studies using recombinant Mincle-Fc fusion protein indicated a specific Ca2+-dependent binding of Mincle to T. forsythia S-layer. Subsequent experiments with Mincle-expressing and Mincle-knockdown macrophages revealed a role for Mincle/S-layer interaction in the induction of both pro- and anti-inflammatory cytokine secretion in macrophages stimulated with T. forsythia as well as its S-layer. Together, these studies revealed Mincle as an important macrophage receptor involved in the modulation of cytokine responses of macrophages against T. forsythia, and thus may play a critical role in orchestrating the host immune response against the bacterium.
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Affiliation(s)
- Sreedevi Chinthamani
- Dept. of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
| | - Rajendra P. Settem
- Dept. of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
| | - Kiyonobu Honma
- Dept. of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
| | - Jason G. Kay
- Dept. of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
| | - Ashu Sharma
- Dept. of Oral Biology, University at Buffalo, Buffalo, New York, United States of America
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Abstract
Despite significant advances in recent years in culture-independent molecular microbiology methods, the detailed study of individual bacterial species still relies on having pure cultures in the laboratory. Yet, more than a third of the approximately 700 bacterial taxa found in the human oral cavity are as yet uncultivated in vitro. One such taxon, Tannerella sp. HOT-286 (phylotype BU063), is the focus of much interest since it is associated with periodontal health, while Tannerella forsythia, its closest phylogenetic neighbor, is strongly associated with periodontal disease. HOT-286, however, has remained uncultivated despite the efforts of several research groups, spanning over a decade. The aim of this study was to cultivate Tannerella sp. HOT-286. A heavily diluted sample of subgingival plaque was inoculated onto culture plates supplemented with siderophores (pyoverdines-Fe complex or desferricoprogen) or a neat plaque suspension. After 8 d of anaerobic incubation, microcolonies and colonies showing satellitism were passaged onto fresh culture plates cross-streaked with potential helper strains or onto cellulose-acetate membranes placed over lawn cultures of helper strains. Subcultured colonies were identified by 16S rRNA gene sequencing, and purity was confirmed by sequencing 20 clones per library prepared from a single colony. Three colonies of interest (derived from pyoverdines- and plaque-supplemented plates) were identified as Tannerella sp. HOT-286. The isolates were found to be incapable of independent growth, requiring helpers such as Propionibacterium acnes and Prevotella intermedia for stimulation, with best growth on membranes over "helper" lawns. A representative isolate was subjected to phenotypic characterization and found to produce a range of glycosidic and proteolytic enzymes. Further comparison of this novel "periodontal health-associated" taxon with T. forsythia will be valuable in investigating virulence factors of the latter and possible health benefits of the former.
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Affiliation(s)
- S R Vartoukian
- Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - R V Moazzez
- King's College London Dental Institute, London, UK
| | - B J Paster
- The Forsyth Institute, Cambridge, MA, USA Harvard School of Dental Medicine, Boston, MA, USA
| | - F E Dewhirst
- The Forsyth Institute, Cambridge, MA, USA Harvard School of Dental Medicine, Boston, MA, USA
| | - W G Wade
- Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK The Forsyth Institute, Cambridge, MA, USA
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