Article
Cell Biology
Mariana Rates Gonzaga Santos, Ian de Meira Chaves, Celso Martins Queiroz-Junior, Allysson Thiago Cramer, Thales Augusto Anestino, Anna Clara Paiva Menezes dos Santos, Paulo Gaio Leite, Soraia Macari, Breno Rocha Barrioni, Marivalda de Magalhaes Pereira, Mauro Martins Teixeira, Danielle da Gloria de Souza, Mila Fernandes Moreira Madeira, Fabiana Simao Machado
Summary: This study investigated the role of SOCS2 in Aa-induced alveolar bone loss. Alveolar bone loss was induced by infecting mice with Aa and bone parameters, cell counts, and cytokine profile were evaluated. Results showed that SOCS2 deficiency increased alveolar bone loss despite decreased proinflammatory cytokine production. Therefore, SOCS2 is a regulator of Aa-induced bone loss and an important target for preventing alveolar bone loss in periodontal inflammatory conditions.
INFLAMMATION RESEARCH
(2023)
Article
Microbiology
Yohei Nakamura, Koji Watanabe, Yoshie Yoshioka, Wataru Ariyoshi, Ryota Yamasaki
Summary: The effect of hydrogen peroxide on Aggregatibacter actinomycetemcomitans was investigated. The treatment resulted in the survival of approximately 0.5% of the bacterial population. Surviving bacteria did not acquire resistance to hydrogen peroxide but exhibited persister behavior. Sterilization with mitomycin C reduced the number of persister survivors.
Review
Dentistry, Oral Surgery & Medicine
Nabil Khzam, Leticia Algarves Miranda, Omar Kujan, Kate Shearston, Dorte Haubek
Summary: This study investigated the global prevalence of the JP2 genotype of Aggregatibacter actinomycetemcomitans (Aa). The results showed a relatively high presence of the JP2 genotype in subjects from South America, North America, and Africa. However, there were no studies estimating the presence of the JP2 genotype in the Oceania region. Due to the heterogeneity and quality of the included publications, caution should be exercised when interpreting the data, and there is a need for additional evidence.
CLINICAL ORAL INVESTIGATIONS
(2022)
Article
Microbiology
Manuela R. Bueno, Karin H. Ishikawa, Gislane Almeida-Santos, Ellen S. Ando-Suguimoto, Natali Shimabukuro, Dione Kawamoto, Marcia P. A. Mayer
Summary: Probiotics may help achieve a balanced microbiome in periodontitis by interfering with the colonization of Aggregatibacter actinomycetemcomitans in the oral cavity. This in vitro study evaluated the effect of two commercially available lactobacilli strains on gingival epithelial cells infected with A. actinomycetemcomitans. The results suggest that these probiotics may reduce the ability of A. actinomycetemcomitans to interact with gingival epithelial cells and modulate the cells' response.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Christian Damgaard, Anne Katrine Danielsen, Christian Enevold, Jesper Reinholdt, Palle Holmstrup, Claus H. Nielsen, Laura Massarenti
Summary: This study revealed a high prevalence of Aa in the saliva of patients with periodontitis-B or periodontitis-C. Serum antibodies against LtxA can distinguish patients with periodontitis from healthy controls.
JOURNAL OF PERIODONTOLOGY
(2021)
Article
Medicine, General & Internal
Klara Martinsson, Andrea Di Matteo, Carina Ohman, Anders Johansson, Anna Svard, Kulveer Mankia, Paul Emery, Alf Kastbom
Summary: This study aimed to determine the presence of antibodies towards LtxA in patients at risk of developing rheumatoid arthritis (RA). The results showed that serum anti-LtxA levels were not elevated before RA diagnosis, and associations with disease progression and ACPA levels differed between populations.
FRONTIERS IN MEDICINE
(2023)
Article
Immunology
Hazel Ozuna, Silvia M. Uriarte, Donald R. Demuth
Summary: This study revealed that human neutrophils can synthesize, store, and release epinephrine, which A. actinomycetemcomitans relies on as a growth signal. The bacteria promotes azurophilic granule exocytosis by neutrophils to acquire epinephrine for survival, providing new insights into the mechanism of bacterial infection in periodontitis.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Microbiology
Zeinab Razooqi, Carola Hoglund Aberg, Francis Kwamin, Rolf Claesson, Dorte Haubek, Jan Oscarsson, Anders Johansson
Summary: The study aimed to investigate the presence of two oral pathogens and their genotypes in relation to the development of periodontal disease. The results show that the presence of Aggregatibacter actinomyctemcomitans and Filifactor alocis is associated with increased periodontal pocket depth and progression of the disease.
Article
Immunology
Zihan Li, Qiuxia Huang, Zhuoran Wang, Lijia Huang, Lisha Gu
Summary: Periodontitis is a dysbiosis condition caused by the coordinated action of multiple members within the microbial consortium. This study demonstrates that Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans can alter the structure and composition of subgingival microbiome, leading to dysbiosis and impaired epithelium function. P. gingivalis drives the commensal microbiome towards dysbiosis, while A. actinomycetemcomitans enhances the symbiotic state.
JOURNAL OF INFECTIOUS DISEASES
(2023)
Article
Biochemistry & Molecular Biology
Yuri Song, Jin Chung
Summary: This study aimed to investigate the molecular mechanism and anti-inflammatory function of zingerone on periodontal inflammation induced by A. actinomycetemcomitans. Zingerone inhibited nitric oxide (NO) production and the expression of pro-inflammatory cytokines in THP-1 macrophages. It also enhanced autophagosome formation and reduced the intracellular survival of A. actinomycetemcomitans. These findings suggest that zingerone has potential as a treatment for periodontal inflammation.
Article
Microbiology
Rolf Claesson, Jan Oscarsson, Anders Johansson
Summary: The JP2 genotype of A. actinomycetemcomitans is associated with aggressive forms of periodontitis and can be detected in subgingival plaque samples from adolescents worldwide. The dissemination of this genotype follows migration routes and can now be found in periodontitis patients in many countries.
Article
Microbiology
Rolf Claesson, Anders Johansson, Georgios N. Belibasakis
Summary: The aim of this study was to compare the prevalence and proportions of three bacterial species in periodontitis pocket samples from young and old patients. The results showed that the prevalence of Aggregatibacter actinomycetemcomitans was higher in young patients, while Porphyromonas gingivalis was similarly distributed in both age groups. Parvimonas micra was more prevalent in old patients. Furthermore, the proportion of samples containing A. actinomycetemcomitans and P. micra together was higher than when P. gingivalis was present.
Article
Biochemistry & Molecular Biology
Kartheyaene Jayaprakash Demirel, Rongrong Wu, Alessandra Neves Guimaraes, Isak Demirel
Summary: This study investigated the role of leukotoxin, caspase-1, caspase-4, and NLRP3 in the immune response of gingival epithelial cells during Aggregatibacter actinomycetemcomitans infection. The results showed that the highly leukotoxic strain induced higher release of inflammatory mediators and cell death, which were dependent on caspase-1, caspase-4, and NLRP3. Furthermore, the absence of NLRP3 resulted in significantly different release of inflammatory proteins in infected cells compared to normal cells.
Article
Microbiology
Daniel Betancur, Camila Munoz Grez, Angel Onate
Summary: This study evaluated the response of oral keratinocytes and macrophages to Aggregatibacter actinomycetemcomitans, finding that different serotypes of the bacteria induced increased expression of cytokines and related molecules in the cells at various time points after infection. Keratinocytes and macrophages contribute to early inflammation in periodontitis, acting as the first signal for immune cell recruitment and modulation of immune responses.
Article
Dentistry, Oral Surgery & Medicine
Thomas E. Rams, Adolfo Contreras, Jorgen Slots
Summary: This study found a high prevalence of early-age aggressive periodontitis in Pueblo Indian adolescents, mainly influenced by periodontopathic bacteria and herpesviruses.
JOURNAL OF PERIODONTOLOGY
(2023)
Article
Dentistry, Oral Surgery & Medicine
Masanori Iwasaki, Michihiko Usui, Wataru Ariyoshi, Keisuke Nakashima, Yoshie Nagai-Yoshioka, Maki Inoue, Kaoru Kobayashi, Tatsuji Nishihara
Summary: A study in Japanese adults found that short sleep duration was associated with severe periodontitis, with those sleeping less than 7-7.9 hours being at higher risk of periodontitis. The prevalence of severe periodontitis did not increase with longer sleep durations.
JOURNAL OF CLINICAL PERIODONTOLOGY
(2022)
Article
Nutrition & Dietetics
Yurie Mikami, Keiko Motokawa, Maki Shirobe, Ayako Edahiro, Yuki Ohara, Masanori Iwasaki, Misato Hayakawa, Yutaka Watanabe, Hiroki Inagaki, Hunkyung Kim, Shoji Shinkai, Shuichi Awata, Hirohiko Hirano
Summary: This study investigated the association between eating alone and poor appetite, and found that eating alone is significantly associated with poor appetite.
Article
Environmental Sciences
Masanori Iwasaki, Ichinosuke Maeda, Yota Kokubo, Yoshitomo Tanaka, Tetsuji Ueno, Wataru Takahashi, Yutaka Watanabe, Hirohiko Hirano
Summary: Bite force is a crucial indicator of masticatory performance. A novel capacitive-type pressure-mapping sensor was developed to accurately and effectively measure bite force. The sensor converts mechanical forces into changes in capacitance and estimates bite force through a regression equation.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Microbiology
B. Jabri, M. Iken, S. Ait- Ou-amar, S. Rida, A. Bouziane, O. K. Ennibi
Summary: This study aims to evaluate the association of Candida albicans and Candida dubliniensis with periodontitis in adolescents and young adults in a Moroccan population. The results showed that Candida albicans is more frequently associated with periodontitis and the presence of these two species is not related to gender, age or severity of periodontal disease.
INTERNATIONAL JOURNAL OF MICROBIOLOGY
(2022)
Article
Environmental Sciences
Masanori Iwasaki, Ichinosuke Maeda, Yota Kokubo, Yoshitomo Tanaka, Tetsuji Ueno, Yuki Ohara, Keiko Motokawa, Misato Hayakawa, Maki Shirobe, Ayako Edahiro, Hisashi Kawai, Yoshinori Fujiwara, Kazushige Ihara, Hunkyung Kim, Yutaka Watanabe, Shuichi Obuchi, Hirohiko Hirano
Summary: The study established standard values and concurrent validity of OFMD-CPS-measured occlusal force in community-dwelling older adults. Results showed a strong positive correlation between OFMD-CPS-measured and Dental Prescale II-measured occlusal force, with high diagnostic accuracy of OFMD-CPS-measured occlusal force against the preset cutoff value of Dental Prescale II.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Maaya Takeda, Yutaka Watanabe, Takae Matsushita, Kenshu Taira, Kazuhito Miura, Yuki Ohara, Masanori Iwasaki, Kayoko Ito, Junko Nakajima, Yasuyuki Iwasa, Masataka Itoda, Yasuhiro Nishi, Junichi Furuya, Yoshihiko Watanabe, George Umemoto, Masako Kishima, Hirohiko Hirano, Yuji Sato, Mitsuyoshi Yoshida, Yutaka Yamazaki
Summary: This study aimed to assess whether older adult residents of long-term care facilities should switch from a normal to a dysphagia diet. The results suggest that simple assessments can be used to screen for early signs of discrepancies between food form and eating/swallowing functions.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Dentistry, Oral Surgery & Medicine
Sarah Reddahi, Amal Bouziane, Sana Rida, Houssain Tligui, Oumkeltoum Ennibi
Summary: This study evaluated salivary concentrations of IL-1 beta, IL-6, MMP-8, and IL-10 in healthy and periodontitis patients and found that IL-1 beta and IL-6 concentrations were significantly higher in periodontitis patients, suggesting their potential use as diagnostic tools for periodontitis.
INTERNATIONAL JOURNAL OF DENTISTRY
(2022)
Review
Medicine, General & Internal
Mariam Mounsif, Fatima Ezzahraa Smouni, Amal Bouziane
Summary: This systematic review found low-level evidence for the use of fibrin sealant as an alternative to sutures in periodontal surgery, indicating a need for more research to support and confirm the results of the included studies.
ANNALS OF MEDICINE AND SURGERY
(2022)
Article
Medicine, General & Internal
Ghita Kadri, Zahra Enejjari, Amal Bouziane
Summary: This study aimed to explore the knowledge, attitudes, and practices of dentists towards the concept of evidence-based dentistry (EBD). The findings showed that lack of time and lack of training on critical appraisal were major obstacles to applying EBD. Knowledge of PICO question formulation and previous EBD training were significantly associated with the implementation of EBD.
ANNALS OF MEDICINE AND SURGERY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Masanori Iwasaki, Akihiro Yoshihara, Kana Suwama, Takashi Zaitsu, Seitaro Suzuki, Hikaru Ihira, Norie Sawada, Jun Aida
Summary: This study aimed to investigate the association between physical activity and periodontitis in the Japanese population. The results showed an inverse relationship between total physical activity and the presence and severity of periodontitis in Japanese women, but no association was found in Japanese men.
JOURNAL OF PERIODONTAL RESEARCH
(2023)
Article
Health Care Sciences & Services
Maaya Takeda, Yutaka Watanabe, Kenshu Taira, Kazuhito Miura, Yuki Ohara, Masanori Iwasaki, Kayoko Ito, Junko Nakajima, Yasuyuki Iwasa, Masataka Itoda, Yasuhiro Nishi, Yoshihiko Watanabe, Masako Kishima, Hirohiko Hirano, Maki Shirobe, Shunsuke Minakuchi, Mitsuyoshi Yoshida, Yutaka Yamazaki
Summary: This 1-year multicenter prospective cohort study aimed to determine the association between observable eating and swallowing function factors and outcomes among elderly persons in long-term care insurance facilities in Japan. Language, salivation, halitosis, perioral muscle, coughing, respiration after swallowing, rinsing, and oral residue were significantly associated with the outcomes. Routine performance of these simple assessments by caregivers may allow early detection and treatment to prevent death, pneumonia, aspiration, and malnutrition in elderly persons.
Article
Public, Environmental & Occupational Health
Idriss Ziani, Ahmed Ibrahimi, Youssef Zaoui, Hachem EL Sayegh, Redouane Abouqal, Yassine Nouini, Amal Bouziane
Summary: In this retrospective study of 300 patients diagnosed with primary non-muscle invasive bladder tumors (NMIBC), it was found that the neutrophil/lymphocyte ratio (NLR) can be a reliable predictor of disease course. High NLR was associated with increased recurrence, progression, and failure of BCG immunotherapy.
PAN AFRICAN MEDICAL JOURNAL
(2023)
Review
Endocrinology & Metabolism
Ihsane Hmamouchi, Farhanah Paruk, Samar Tabra, Kaouther Maatallah, Amal Bouziane, Redouane Abouqal, Yasser El Maidany, Abdellah El Maghraoui, Asgar Ali Kalla
Summary: This study found significant variation in the prevalence of glucocorticosteroid-induced osteoporosis (GIOP) in Africa. Limited data is available for most of Africa, and further prospective studies are needed to develop context-specific strategies for GIOP prevention.
ARCHIVES OF OSTEOPOROSIS
(2023)
Article
Urology & Nephrology
Idriss Ziani, Ahmed Ibrahimi, Omar Bellouki, Hachem Elsayegh, Redouane Abouqal, Yassine Nouini, Amal Bouziane
Summary: Inflammation plays a key role in the development of cancers. This study aims to investigate the impact of lymphocyte count on the response to BCG-immunotherapy in non-muscle-invasive bladder cancer (NMIBC) patients, specifically examining lymphocytopenia as a prognostic factor for BCG-failure.
AFRICAN JOURNAL OF UROLOGY
(2023)
Review
Medicine, General & Internal
Amal Bouziane, Sara Lattaf, Lamiaa Abdallaoui Maan
Summary: This systematic review evaluates the relationship between periodontal disease (PD) and Alzheimer's disease (AD), finding that patients with PD are at a higher risk of AD compared to those with healthy periodontium. However, caution is needed in interpreting the results due to methodological limitations. Future research should focus on conducting powerful and comparable epidemiological studies to further evaluate the relationship between PD and AD.
CUREUS JOURNAL OF MEDICAL SCIENCE
(2023)