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Oda Y, Furutani C, Kawano R, Murakami J, Mizota Y, Okada Y, Nikawa H. Comparison of dental plaque flora between intellectually disabled patients and healthy individuals: a cross-sectional study. Odontology 2024; 112:588-600. [PMID: 37462789 DOI: 10.1007/s10266-023-00837-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 07/04/2023] [Indexed: 03/12/2024]
Abstract
Periodontal diseases, including gingivitis, are highly prevalent in individuals with intellectual disability (ID). In particular, gingivitis can be difficult to cure owing to the lack of patient cooperation. Here, we evaluated differences in the oral bacterial flora between individuals with ID (n = 16) and healthy controls (n = 14) to facilitate the development of strategies for the prevention of periodontal disease in people with ID. Our results showed no significant difference in the number of decayed, missing, and filled teeth between the two groups. However, there were significant differences in the median papillary-marginal-attached index, plaque index, and gingival index between groups (P < 0.0001). Additionally, the mean probing depth in the ID group was significantly higher than that in the control group (P < 0.0001). The diversity of oral flora in people with ID and concurrent gingivitis was significantly lower than that of healthy individuals without periodontal disease. The relative abundances of Tannerella spp. and Treponema spp. were significantly higher in the ID group than in the control group at the genus level (P = 0.0383 and 0.0432, respectively), whereas that of Porphyromonas spp. was significantly lower in the ID group (P < 0.0001). Overall, our findings provided important insights into differences in the oral microbiota between patients with ID and healthy controls.
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Affiliation(s)
- Yuki Oda
- Department of Special Care Dentistry, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
| | - Chiaki Furutani
- Department of Special Care Dentistry, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
| | - Reo Kawano
- Center for Integrated Medical Research, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
| | - Jumpei Murakami
- Division of Special Care Dentistry, Osaka University Dental Hospital, 1-8 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yuika Mizota
- Division of Dental Hygiene, Department of Clinical Practice and Support, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
| | - Yoshiyuki Okada
- Department of Special Care Dentistry, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8551, Japan
| | - Hiroki Nikawa
- Department of Oral Biology and Engineering, Hiroshima University, 1-2-3 Kasumi, Minami-Ku, Hiroshima, 734-8553, Japan.
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Kitagawa M, Ouhara K, Oka H, Sakamoto S, Yamane Y, Kashiwagi A, Kanamoto R, Miyauchi M, Nagamine K. Selective and easy detection of the Porphyromonas gingivalis fimA type II and IV genes by loop-mediated isothermal amplification. J Microbiol Methods 2021; 185:106228. [PMID: 33878444 DOI: 10.1016/j.mimet.2021.106228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 11/25/2022]
Abstract
Porphyromonas gingivalis fimbrillin (fimA) type II and IV, the definitive factors for periodontitis, are also found to be associated with systemic diseases. To detect the fimA type II and IV genes easily and rapidly, we used the loop-mediated isothermal amplification (LAMP) method. The LAMP method showed high specificity as DNA from the P. gingivalis HW24D1 strain could only be amplified by the type II-specific primers and that from the W83 strain could only be amplified by the type IV-specific primers. Pathogens, namely, Streptococcus sobrinus, S. mutans, and Candida species, lack the type II and IV genes, and hence, were not detected by the LAMP reaction. Both bacterial cells and purified DNA could be used in the LAMP reaction. The LAMP reaction was highly sensitive and both type II and type IV genes could be detected in 1000 DNA molecules. In the bacterial suspensions of HW24D1 and W83 strains, type II and type IV genes, respectively, could be detected in 100 bacterial cells. We examined the type II and type IV genes in the dental plaques from 22 P. gingivalis-positive patients using the LAMP method. Only one person was found to be positive for the type II gene (4.5%). For the type IV gene, 3 positive cases (13.6%) were identified. Moreover, type II and type IV genes could be detected simultaneously using a multiplex amplification primer of fimA type II and type IV, under visible light. Thus, we established a selective and easy method to detect P. gingivalis fimA type II and IV genes using LAMP.
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Affiliation(s)
- Masae Kitagawa
- Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima, Japan.
| | - Kazuhisa Ouhara
- Department of Periodontology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hiroko Oka
- Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima, Japan; Center for Cause of Death Investigation Research & Education, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Shinichi Sakamoto
- Center of Oral Clinical Examination, Hiroshima University Hospital, Hiroshima, Japan
| | - Yuka Yamane
- Faculty of Health Sciences, Hiroshima International University, Hiroshima, Japan
| | - Ayaka Kashiwagi
- Faculty of Health Sciences, Hiroshima International University, Hiroshima, Japan
| | - Rinka Kanamoto
- Faculty of Health Sciences, Hiroshima International University, Hiroshima, Japan
| | - Mutusmi Miyauchi
- Department of Oral Maxillofacial Pathobiology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kentaro Nagamine
- Faculty of Health Sciences, Hiroshima International University, Hiroshima, Japan
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Pan S, Liu Y, Si Y, Zhang Q, Wang L, Liu J, Wang C, Xiao S. Prevalence of fimA genotypes of Porphyromonas gingivalis in adolescent orthodontic patients. PLoS One 2017; 12:e0188420. [PMID: 29176857 PMCID: PMC5703466 DOI: 10.1371/journal.pone.0188420] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 11/07/2017] [Indexed: 11/24/2022] Open
Abstract
Background The placement of fixed orthodontic appliances may alter the composition of oral microbiota and has the potential risk of periodontal complication. Porphyromonas gingivalis fimbriae play a critical role in colonization of P. gingivalis in subgingival regions. In this study, we investigated the association between the prevalence of P. gingivalis-specific fimA genotypes and periodontal health status in adolescent orthodontic patients, to identify the pathogencity of P. gingivalis during orthodontic therapy. Methods Sixty-one adolescent orthodontic patients were enrolled in the case group, while the control group consisted of 56 periodontally healthy adolescents. At baseline (T0), clinical parameter (gingival index) was tested, and subgingival plaque samples were obtained from the lower incisors. The incidences of P. gingivalis and fimA genotypes were detected by polymerase chain reaction. All parameters were reassessed after 1 month (T1), 2 months (T2), 3 months (T3), and 6 months (T4) in the case group and then compared with those of the controls. Results Both microbiological and clinical parameters from orthodontic patients started to increase after placement of fixed appliances. Maximum values were reached at 3 months after placement and followed by their decreases at six months. However, the microbiological and clinical parameters in the case group were significantly higher than those of the control group. The GI of fimA II, IV-positive samples was significantly higher than that of negative samples. Conclusion P. gingivalis carrying fimA II or IV was closely related to orthodontic gingivitis. In addition, proper oral hygiene control could lead to little increase in dental plaque accumulation, and exert a beneficial effect to periodontal tissues.
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Affiliation(s)
- Shuang Pan
- Department of Orthodontics, School of Stomatology, Shandong University, Jinan, China
- Department of Orthodontics, Jinan Stomatological Hospital, Jinan, China
| | - Yi Liu
- Pediatric Research Institute, Qilu Children’s Hospital of Shandong University, Jinan, China
| | - Yi Si
- Department of Oral Medicine, Shandong Medical College, Jinan, China
| | - Qiang Zhang
- Department of Implantology, Jinan Stomatological Hospital, Jinan, China
| | - Lin Wang
- Department of Stomatology, the First Hospital of Jinan, Jinan, China
| | - Jianwei Liu
- Department of Orthodontics, Jinan Stomatological Hospital, Jinan, China
| | - Chunling Wang
- Department of Orthodontics, School of Stomatology, Shandong University, Jinan, China
- * E-mail: (CW); (SX)
| | - Shuiqing Xiao
- Department of Oral Medicine, Shandong Medical College, Jinan, China
- Department of Implantology, Jinan Stomatological Hospital, Jinan, China
- * E-mail: (CW); (SX)
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Rafiei M, Kiani F, Sayehmiri F, Sayehmiri K, Sheikhi A, Zamanian Azodi M. Study of Porphyromonas gingivalis in periodontal diseases: A systematic review and meta-analysis. Med J Islam Repub Iran 2017; 31:62. [PMID: 29445691 PMCID: PMC5804457 DOI: 10.18869/mjiri.31.62] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Indexed: 12/26/2022] Open
Abstract
Background: The mouth cavity hosts various types of anaerobic bacteria including Porphyromonas gingivalis, which causes periodontal
inflammatory diseases. P. gingivalis is a gram-negative oral anaerobe and is considered as a main etiological factor in periodontal
diseases. Several studies have reported a relationship between P. gingivalis in individuals with periodontal diseases and a critical role of
this bacterium in the pathogenesis of periodontal diseases. The present study aimed at estimating this probability using a meta-analysis.
Methods: We searched several databases including PubMed, Scopus, Google Scholar, and Web of Science to identify case-control
studies addressing the relationship between P. gingivalis with periodontal diseases. A total of 49 reports published from different countries
from 1993 to 2014 were included in this study. I² (heterogeneity index) statistics were calculated to examine heterogeneity. Data
were analyzed using STATA Version 11.
Results: After a detailed analysis of the selected articles, 49 case-control studies with 5924 individuals fulfilled the inclusion criteria
for the meta-analysis. The healthy controls included 2600 healthy individuals with a Mean±SD age of 36.56±7.45 years. The periodontal
diseases group included 3356 patients with a mean age of 43.62±8.35 years. There was a statistically significant difference between P. gingivalis in periodontal patients and healthy controls; 9.24 (95% CI: 5.78 to 14.77; P = 0.000). In the other word, there was a significant
relationship between the presence of P. gingivalis and periodontal diseases.
Conclusion: Analyzing the results of the present study, we found a strong association between the presence of P. gingivalis and periodontal diseases. This result suggests that another research is needed to further assess this subject.
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Affiliation(s)
- Mohammad Rafiei
- Department of Biostatistics and Epidemiology, School of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Faezeh Kiani
- Student Research Committee, Ilam University of Medical Sciences, Ilam, Iran
| | - Fatemeh Sayehmiri
- Proteomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Kourosh Sayehmiri
- Department of Social Medicine, School of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - Abdolkarim Sheikhi
- Department of Immunology and Microbiology, Dezful University of Medical Sciences, Dezful, Iran
| | - Mona Zamanian Azodi
- Proteomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Prevalence of periodontal pathogens as predictor of the evolution of periodontal status. Odontology 2016; 105:467-476. [PMID: 27888369 DOI: 10.1007/s10266-016-0286-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 10/31/2016] [Indexed: 12/22/2022]
Abstract
The aim of this study was to determine the relationship between the prevalence of Porphyromonas gingivalis, its fimA genotypes, Aggregatibacter actinomycetemcomitans, Tannerella forsythia, and Treponema denticola and the evolution of periodontal health. In a longitudinal prospective study, samples of subgingival plaque were taken from 114 patients (37 with chronic periodontitis, 17 with gingivitis, and 60 periodontally healthy) in the course of a full periodontal examination. PCR was employed to determine the presence of the periodontopathogenic bacteria. Four years later, a second examination and sample collection were performed in 90 of these patients (20 with chronic periodontitis, 12 with gingivitis, and 58 periodontally healthy). T. forsythia, P. gingivalis, and T. denticola are the most prevalent bacteria in patients with chronic periodontitis (78.4%, 62.2 y 56.8%, respectively). The P. gingivalis bacterium and its fimA genotypes I, II, and IV showed the highest correlation between the baseline and follow-up assessments. P. gingivalis fimA genotype II and T. forsythia were associated to a significant degree with unfavourable periodontal evolution. Of the variables studied, P. gingivalis fimA genotype II and T. forsythia increase the risk of an unfavourable evolution of periodontal status.
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Krishnan M, Krishnan P, Chandrasekaran SC. Detection of Porphyromonas gingivalis fimA Type I Genotype in Gingivitis by Real-Time PCR-A Pilot Study. J Clin Diagn Res 2016; 10:ZC32-5. [PMID: 27504406 DOI: 10.7860/jcdr/2016/17938.7979] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 02/23/2016] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Published literature till date reveals a high prevalence of Porphyromonas gingivalis fimA type I genotype among healthy subjects. Quite a few studies have reported its prevalence also in periodontitis patients. Nevertheless incidence of this genotype in gingivitis is lacking in adult population. AIM The present study was chosen to detect P. gingivalis fimA type I genotype among chronic gingivitis patients. MATERIALS AND METHODS A total of 46 subgingival plaque samples collected from chronic marginal gingivitis (n=23) and chronic periodontitis subjects (control group) (n=23) were subjected to Real-Time Polymerase Chain Reaction to detect the P. gingivalis fimA type I gene. Statistical analysis was performed using chi-square test. RESULTS Prevalence of P. gingivalis fimA type I gene among chronic periodontitis and chronic gingivitis patients were 8.7% and 30.4% respectively. P. gingivalis fimA type I genotype prevalence was found to be statistically insignificant between the two study groups (p=0.135). CONCLUSION The avirulent P. gingivalis fimA type I genotype, occurred in high prevalence among chronic gingivitis patients, while its presence was low in chronic periodontitis patients. Presence of this avirulent genotype in chronic marginal gingivitis signifies its reversible condition.
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Affiliation(s)
- Mahalakshmi Krishnan
- Professor and Head, Department of Microbiology/Director, Research Lab for Oral-Systemic Health, Sree Balaji Dental College and Hospital, BIHER , Velachery - Tambaram Road, Chennai, India
| | - Padma Krishnan
- Assistant Professor, Department of Microbiology, Dr. ALM PGIBMS, University of Madras , Chennai, India
| | - S C Chandrasekaran
- Professor and Head, Department of Periodontics and Implantology, Sree Balaji Dental College and Hospital, BIHER , Velachery - Tambaram Road, Chennai, India
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Kim SG, Hong JY, Shin SI, Moon JH, Lee JY, Herr Y. Prevalence of Porphyromonas gingivalis fimA genotypes in the peri-implant sulcus of Koreans assessed using a new primer. J Periodontal Implant Sci 2016; 46:35-45. [PMID: 26937292 PMCID: PMC4771836 DOI: 10.5051/jpis.2016.46.1.35] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 01/23/2016] [Indexed: 11/08/2022] Open
Abstract
PURPOSE Porphyromonas gingivalis fimA is a virulence factor associated with periodontal diseases, but its role in the pathogenesis of peri-implantitis remains unclear. We aimed to evaluate the relationship between the condition of peri-implant tissue and the distribution of P. gingivalis fimA genotypes in Koreans using a new primer. METHODS A total of 248 plaque samples were taken from the peri-implant sulci of 184 subjects. The control group consisted of sound implants with a peri-implant probing depth (PD) of 5 mm or less with no bleeding on probing (BOP). Test group I consisted of implants with a peri-implant PD of 5 mm or less and BOP, and test group II consisted of implants with a peri-implant PD of more than 5 mm and BOP. DNA was extracted from each sample and analyzed a using a polymerase chain reaction (PCR) with P. gingivalis-specific primers, followed by an additional PCR assay to differentiate the fimA genotypes in P. gingivalis-positive subjects. RESULTS The Prevalence of P. gingivalis in each group did not significantly differ (P>0.05). The most predominant fimA genotype in all groups was type II. The prevalence of type Ib fimA was significantly greater in test group II than in the control group (P<0.05). CONCLUSIONS The fimA type Ib genotype of P. gingivalis was found to play a critical role in the destruction of peri-implant tissue, suggesting that it may be a distinct risk factor for peri-implantitis.
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Affiliation(s)
- Sung-Geun Kim
- Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Ji-Youn Hong
- Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Korea.; Department of Periodontology, Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Seung-Il Shin
- Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Korea.; Department of Periodontology, Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Ji-Hoi Moon
- Department of Maxillofacial Biomedical Engineering, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Jin-Yong Lee
- Department of Maxillofacial Biomedical Engineering, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Yeek Herr
- Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Korea.; Department of Periodontology, Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, Korea
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Yang J, Wu J, Liu Y, Huang J, Lu Z, Xie L, Sun W, Ji Y. Porphyromonas gingivalis infection reduces regulatory T cells in infected atherosclerosis patients. PLoS One 2014; 9:e86599. [PMID: 24466164 PMCID: PMC3900568 DOI: 10.1371/journal.pone.0086599] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Accepted: 12/11/2013] [Indexed: 12/22/2022] Open
Abstract
Increasing evidence has shown periodontal pathogen Porphyromonas gingivalis (P.gingivalis) infection contributes to atherosclerosis (AS) progression. P.gingivalis fimbriae act as an important virulence factor in AS. Regulatory T cells (Tregs) may play a crucial role in autoimmune response during this process. However, whether P.gingivalis infection is associated with Tregs dysregulation during AS is still unknown and the prevalence of different P.gingivalis FimA genotypes during this process is unclear. Here we analyzed the distribution of Tregs and in P.gingivalis-infected atherosclerotic patients to reveal the relationship between P.gingivalis infection and Tregs reduction/dysfunction and to elucidate their role in periodontitis-AS interaction. FimA genotype was also examined to determine the prevalence of fimbriae. Our results showed that P.gingivalis infection reduced Tregs in atherosclerotic patients compared with non-atherosclerotic patients and health controls. Concentration of TGF-β1, which plays an important role in the development of Tregs, also decreased in P.gingivalis infected patients. Furthermore, type II FimA seems to show higher prevalence than the other five detected types. The population of Tregs further decreased in patients with type II FimA compared with the other types. P.gingivlias FimA genotype II was the dominant type associated with decreased Treg population. These results indicate that P.gingivalis infection may be associated with Tregs dysregulation in AS; type II FimA may be a predominant genotype in this process.
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Affiliation(s)
- Jie Yang
- Department of Periodontology, Hospital of Stomatology, Medical School, Nanjing University, Nanjing, Jiangsu Province, China
- Central Laboratory of Stomatology, Hospital of Stomatology, Medical School, Nanjing University, Nanjing, Jiangsu Province, China
| | - Juan Wu
- Department of Periodontology, Hospital of Stomatology, Medical School, Nanjing University, Nanjing, Jiangsu Province, China
| | - Yu Liu
- Department of Periodontology, Hospital of Stomatology, Medical School, Nanjing University, Nanjing, Jiangsu Province, China
| | - Jin Huang
- Department of Cardiology, Nanjing Chest Hospital, Nanjing, Jiangsu Province, China
| | - Zhipin Lu
- Department of Cardiology, Nanjing Chest Hospital, Nanjing, Jiangsu Province, China
| | - Liping Xie
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Centre, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Weibin Sun
- Department of Periodontology, Hospital of Stomatology, Medical School, Nanjing University, Nanjing, Jiangsu Province, China
- * E-mail: (WS); (YJ)
| | - Yong Ji
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Atherosclerosis Research Centre, Nanjing Medical University, Nanjing, Jiangsu Province, China
- * E-mail: (WS); (YJ)
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Liu Y, Zhang Y, Wang L, Guo Y, Xiao S. Prevalence of Porphyromonas gingivalis four rag locus genotypes in patients of orthodontic gingivitis and periodontitis. PLoS One 2013; 8:e61028. [PMID: 23593379 PMCID: PMC3617233 DOI: 10.1371/journal.pone.0061028] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Accepted: 03/05/2013] [Indexed: 12/26/2022] Open
Abstract
Porphyromonas gingivalis is considered as a major etiological agent in periodontal diseases and implied to result in gingival inflammation under orthodontic appliance. rag locus is a pathogenicity island found in Porphyromonas gingivalis. Four rag locus variants are different in pathogenicity of Porphyromonas gingivalis. Moreover, there are different racial and geographic differences in distribution of rag locus genotypes. In this study, we assessed the prevalence of Porphyromonas gingivalis and rag locus genotypes in 102 gingival crevicular fluid samples from 57 cases of gingivitis patients with orthodontic appliances, 25 cases of periodontitis patients and 20 cases of periodontally healthy people through a 16S rRNA-based PCR and a multiplex PCR. The correlations between Porphyromona.gingivalis/rag locus and clinical indices were analyzed. The prevalence of Porphyromonas gingivalis and rag locus genes in periodontitis group was the highest among three groups and higher in orthodontic gingivitis than healthy people (p<0.01). An obviously positive correlation was observed between the prevalence of Porphyromonas gingivalis/rag locus and gingival index. rag-3 and rag-4 were the predominant genotypes in the patients of orthodontic gingivitis and mild-to-moderate periodontitis in Shandong. Porphyromonas.gingivalis carrying rag-1 has the strong virulence and could be associated with severe periodontitis.
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Affiliation(s)
- Yi Liu
- Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Ji'nan, Shandong, China
| | - Yujie Zhang
- Department of Orthodontic, Jinan Stomatological Hospital, Jinan, Shandong, China
| | - Lili Wang
- Clinical Laboratory, Jinan Central Hospital of Shandong University, Jinan, Shandong, China
| | - Yang Guo
- Department of Orthodontic, Jinan Stomatological Hospital, Jinan, Shandong, China
| | - Shuiqing Xiao
- Department of Orthodontic, Jinan Stomatological Hospital, Jinan, Shandong, China
- * E-mail:
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Moon JH, Herr Y, Lee HW, Shin SI, Kim C, Amano A, Lee JY. Genotype analysis of Porphyromonas gingivalis fimA in Korean adults using new primers. J Med Microbiol 2012; 62:1290-1294. [PMID: 23264452 DOI: 10.1099/jmm.0.054247-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Strains of Porphyromonas gingivalis, a periodontopathic bacterium, are classified into six genotypic variants based on nucleotide sequence differences in the fimA gene encoding FimA. A PCR assay using primer sets specific for each genotype has demonstrated that the most predominant fimA genotype in periodontitis patients is type II, which is now commonly referred to as the periodontitis-associated fimA genotype of P. gingivalis. However, the potential for false type II fimA positives caused by cross-hybridization of type II fimA-specific primers with type Ib fimA has complicated the genotyping. A previous study developed new primers that specifically amplified only the DNA fragment of type II fimA. The aim of the present study was to assess the prevalence of P. gingivalis fimA genotypes in Korean adults and to reconfirm the relationship between type II fimA and periodontitis using the new primers. Among 412 Korean adults, P. gingivalis was detected in 97.5 % of patients and 57.8 % of healthy subjects. Type II fimA was the most widely distributed type among healthy and periodontitis subjects. Organisms with types II, Ib and IV fimA had a significant frequency of occurrence in periodontitis subjects. Statistical analysis, however, revealed that a more significant correlation was found between periodontitis and the occurrence of type Ib fimA.
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Affiliation(s)
- Ji-Hoi Moon
- Institute of Oral Biology, Kyung Hee University, Seoul, Republic of Korea
- Department of Maxillofacial Biomedical Engineering, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
| | - Yeek Herr
- Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
- Institute of Oral Biology, Kyung Hee University, Seoul, Republic of Korea
| | - Hyeon-Woo Lee
- Department of Pharmacology, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
- Institute of Oral Biology, Kyung Hee University, Seoul, Republic of Korea
| | - Seung-Il Shin
- Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
- Institute of Oral Biology, Kyung Hee University, Seoul, Republic of Korea
| | - Cheul Kim
- Department of Oral Medicine and Diagnosis, College of Dentistry and Research Institute of Oral Science, Gangneung-Wonju National University, Gangneung, Republic of Korea
| | - Atsuo Amano
- Department of Preventive Dentistry, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Jin-Yong Lee
- Institute of Oral Biology, Kyung Hee University, Seoul, Republic of Korea
- Department of Maxillofacial Biomedical Engineering, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
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