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Tan J, Lamont GJ, Sekula M, Hong H, Sloan L, Scott DA. The transcriptomic response to cannabidiol of Treponema denticola, a phytocannabinoid-resistant periodontal pathogen. J Clin Periodontol 2024; 51:222-232. [PMID: 38105008 DOI: 10.1111/jcpe.13892] [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: 05/12/2023] [Revised: 09/14/2023] [Accepted: 09/26/2023] [Indexed: 12/19/2023]
Abstract
AIM The use of cannabis, which contains multiple antimicrobials, may be a risk factor for periodontitis. We hypothesized that multiple oral spirochetes would be phytocannabinoid-resistant and that cannabidiol (CBD) would act as an environmental stressor to which Treponema denticola would respond transcriptionally, thereby providing first insights into spirochetal survival strategies. MATERIALS AND METHODS Oral spirochete growth was monitored spectrophotometrically in the presence and absence of physiologically relevant phytocannabinoid doses, the transcriptional response to phytocannabinoid exposure determined by RNAseq, specific gene activity fluxes verified using qRT-PCR and orthologues among fully sequenced oral spirochetes identified. RESULTS Multiple strains of oral treponemes were resistant to CBD (0.1-10 μg/mL), while T. denticola ATCC 35405 was resistant to all phytocannabinoids tested (CBD, cannabinol [CBN], tetrahydrocannabinol [THC]). A total of 392 T. denticola ATCC 35405 genes were found to be CBD-responsive by RNAseq. A selected subset of these genes was independently verified by qRT-PCR. Genes found to be differentially activated by both methods included several involved in transcriptional regulation and toxin control. Suppressed genes included several involved in chemotaxis and proteolysis. CONCLUSIONS Oral spirochetes, unlike some other periodontal bacteria, are resistant to physiological doses of phytocannabinoids. Investigation of CBD-induced transcriptomic changes provided insight into the resistance mechanisms of this important periodontal pathogen. These findings should be considered in the context of the reported enhanced susceptibility to periodontitis in cannabis users.
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Affiliation(s)
- Jinlian Tan
- Department of Oral Immunology and Infectious Diseases, University of Louisville, Louisville, Kentucky, USA
| | - Gwyneth J Lamont
- Department of Oral Immunology and Infectious Diseases, University of Louisville, Louisville, Kentucky, USA
| | - Michael Sekula
- Department of Oral Immunology and Infectious Diseases, University of Louisville, Louisville, Kentucky, USA
- Department of Bioinformatics and Biostatistics, University of Louisville, Louisville, Kentucky, USA
| | - HeeJue Hong
- Department of Oral Immunology and Infectious Diseases, University of Louisville, Louisville, Kentucky, USA
| | - Lucy Sloan
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky, USA
| | - David A Scott
- Department of Oral Immunology and Infectious Diseases, University of Louisville, Louisville, Kentucky, USA
- Center for Microbiomics, Inflammation and Pathogenicity, University of Louisville, Louisville, Kentucky, USA
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Săndulescu M, Sîrbu VD, Popovici IA. Bacterial species associated with peri-implant disease - a literature review. Germs 2023; 13:352-361. [PMID: 38361546 PMCID: PMC10866163 DOI: 10.18683/germs.2023.1405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/28/2023] [Accepted: 12/30/2023] [Indexed: 02/17/2024]
Abstract
Peri-implantitis is a pathological condition in dental medicine that manifests as an inflammatory process affecting the tissues surrounding dental implants. Peri-implantitis occurs when the soft and hard tissues surrounding these implants become inflamed, leading to progressive destruction of the supporting bone. The etiology of peri-implantitis is multifactorial, involving microbial, host-related, and environmental factors. Microbial involvement in peri-implantitis can be explained either by direct in-situ virulence activation leading to pathogenicity, or by induction of low-grade chronic immune activation, leading to long-term persistence of a pro-inflammatory status. Understanding peri-implantitis is pivotal in maintaining the long-term success of dental implants and improving patient outcomes in implant-supported restorations. Recognizing the etiological factors, including particular bacterial species, genetic predispositions, and environmental influences, is very important for devising effective preventive strategies and targeted interventions.
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Affiliation(s)
- Mihai Săndulescu
- DDS, PhD, Associate Professor, Department of Implant Prosthetic Therapy, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 17-23 Calea Plevnei, Bucharest 010221, Romania
| | - Valentin Daniel Sîrbu
- DDS, PhD, Assistant Lecturer, Department of Implant Prosthetic Therapy, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 17-23 Calea Plevnei, Bucharest 010221, Romania
| | - Ion Alexandru Popovici
- DDS, PhD, Lecturer, Department of Implant Prosthetic Therapy, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 17-23 Calea Plevnei, Bucharest 010221, Romania
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Aravindraja C, Jeepipalli S, Vekariya KM, Botello-Escalante R, Chan EKL, Kesavalu L. Oral Spirochete Treponema denticola Intraoral Infection Reveals Unique miR-133a, miR-486, miR-126-3p, miR-126-5p miRNA Expression Kinetics during Periodontitis. Int J Mol Sci 2023; 24:12105. [PMID: 37569480 PMCID: PMC10418472 DOI: 10.3390/ijms241512105] [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: 07/10/2023] [Revised: 07/25/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
miRNAs are major regulators of eukaryotic gene expression and host immunity, and play an important role in the inflammation-mediated pathways in periodontal disease (PD) pathogenesis. Expanding our previous observation with the global miRNA profiling using partial human mouth microbes, and lack of in vivo studies involving oral spirochete Treponema denticola-induced miRNAs, this study was designed to delineate the global miRNA expression kinetics during progression of periodontitis in mice infected with T. denticola by using NanoString nCounter® miRNA panels. All of the T. denticola-infected male and female mice at 8 and 16 weeks demonstrated bacterial colonization (100%) on the gingival surface, and an increase in alveolar bone resorption (p < 0.0001). A total of 70 miRNAs with at least 1.0-fold differential expression/regulation (DE) (26 upregulated and 44 downregulated) were identified. nCounter miRNA expression profiling identified 13 upregulated miRNAs (e.g., miR-133a, miR-378) and 25 downregulated miRNAs (e.g., miR-375, miR-34b-5p) in T. denticola-infected mouse mandibles during 8 weeks of infection, whereas 13 upregulated miRNAs (e.g., miR-486, miR-126-5p) and 19 downregulated miRNAs (miR-2135, miR-142-3p) were observed during 16 weeks of infection. One miRNA (miR-126-5p) showed significant difference between 8 and 16 weeks of infection. Interestingly, miR-126-5p has been presented as a potential biomarker in patients with periodontitis and coronary artery disease. Among the upregulated miRNAs, miR-486, miR-126-3p, miR-126-5p, miR-378a-3p, miR-22-3p, miR-151a-3p, miR-423-5p, and miR-221 were reported in human gingival plaques and saliva samples from periodontitis and with diabetes. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis revealed various functional pathways of DE miRNAs, such as bacterial invasion of epithelial cells, Ras signaling, Fc gamma R-mediated phagocytosis, osteoclast differentiation, adherens signaling, and ubiquitin mediated proteolysis. This is the first study of DE miRNAs in mouse mandibles at different time-points of T. denticola infection; the combination of three specific miRNAs, miR-486, miR-126-3p, and miR-126-5p, may serve as an invasive biomarker of T. denticola in PD. These miRNAs may have a significant role in PD pathogenesis, and this research establishes a link between miRNA, periodontitis, and systemic diseases.
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Affiliation(s)
- Chairmandurai Aravindraja
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL 32610, USA; (C.A.)
| | - Syam Jeepipalli
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL 32610, USA; (C.A.)
| | - Krishna Mukesh Vekariya
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL 32610, USA; (C.A.)
| | - Ruben Botello-Escalante
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL 32610, USA; (C.A.)
| | - Edward K. L. Chan
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL 32610, USA
| | - Lakshmyya Kesavalu
- Department of Periodontology, College of Dentistry, University of Florida, Gainesville, FL 32610, USA; (C.A.)
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL 32610, USA
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Zhang Z, Yu W, Li G, He Y, Shi Z, Wu J, Ma X, Zhu Y, Zhao L, Liu S, Wei Y, Xue J, Guo S, Gao Z. Characteristics of oral microbiome of healthcare workers in different clinical scenarios: a cross-sectional analysis. BMC Oral Health 2022; 22:481. [PMID: 36357898 PMCID: PMC9648452 DOI: 10.1186/s12903-022-02501-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 10/12/2022] [Indexed: 11/11/2022] Open
Abstract
The environment of healthcare institutes (HCIs) potentially affects the internal microecology of medical workers, which is reflected not only in the well-studied gut microbiome but also in the more susceptible oral microbiome. We conducted a prospective cross-sectional cohort study in four hospital departments in Central China. Oropharyngeal swabs from 65 healthcare workers were collected and analyzed using 16S rRNA gene amplicon sequencing. The oral microbiome of healthcare workers exhibited prominent deviations in diversity, microbial structure, and predicted function. The coronary care unit (CCU) samples exhibited robust features and stability, with significantly higher abundances of genera such as Haemophilus, Fusobacterium, and Streptococcus, and a lower abundance of Prevotella. Functional prediction analysis showed that vitamin, nucleotide, and amino acid metabolisms were significantly different among the four departments. The CCU group was at a potential risk of developing periodontal disease owing to the increased abundance of F. nucleatum. Additionally, oral microbial diversification of healthcare workers was related to seniority. We described the oral microbiome profile of healthcare workers in different clinical scenarios and demonstrated that community diversity, structure, and potential functions differed markedly among departments. Intense modulation of the oral microbiome of healthcare workers occurs because of their original departments, especially in the CCU.
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Affiliation(s)
- Zhixia Zhang
- Nursing Department, Linfen Central Hospital, 041000 Shanxi, Shanxi China
| | - Wenyi Yu
- grid.411634.50000 0004 0632 4559Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing, China
| | - Guangyao Li
- Science and Education Department, Linfen Central Hospital, Hainan, Shanxi China
| | - Yukun He
- grid.411634.50000 0004 0632 4559Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing, China
| | - Zhiming Shi
- Cardiology Department, Linfen Central Hospital, Hainan, Shanxi China
| | - Jing Wu
- Nursing Department, Linfen Central Hospital, 041000 Shanxi, Shanxi China
| | - Xinqian Ma
- grid.411634.50000 0004 0632 4559Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing, China
| | - Yu Zhu
- Science and Education Department, Linfen Central Hospital, Hainan, Shanxi China
| | - Lili Zhao
- grid.411634.50000 0004 0632 4559Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing, China
| | - Siqin Liu
- grid.440653.00000 0000 9588 091XThe Stomatology College of Binzhou Medical University, Yantai, Shandong China
| | - Yue Wei
- grid.263452.40000 0004 1798 4018Nursing College of Shanxi Medical University, Shanxi, China
| | - Jianbo Xue
- grid.411634.50000 0004 0632 4559Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing, China
| | - Shuming Guo
- Nursing Department, Linfen Central Hospital, 041000 Shanxi, Shanxi China
| | - Zhancheng Gao
- grid.411634.50000 0004 0632 4559Department of Respiratory and Critical Care Medicine, Peking University People’s Hospital, Beijing, China ,grid.411634.50000 0004 0632 4559Department of Pulmonary and Critical Care Medicine, Peking University People’s Hospital, 100044 Beijing, China
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Treponema denticola Induces Interleukin-36γ Expression in Human Oral Gingival Keratinocytes via the Parallel Activation of NF-κB and Mitogen-Activated Protein Kinase Pathways. Infect Immun 2022; 90:e0024722. [PMID: 36040155 PMCID: PMC9584330 DOI: 10.1128/iai.00247-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The oral epithelial barrier acts as both a physical barrier to the abundant oral microbiome and a sentry for the immune system that, in health, constrains the accumulation of the polymicrobial plaque biofilm. The immune homeostasis during gingivitis that is largely protective becomes dysregulated, unproductive, and destructive to gingival tissue as periodontal disease progresses to periodontitis. The progression to periodontitis is associated with the dysbiosis of the oral microbiome, with increasing prevalences and abundances of periodontal pathogens such as Treponema denticola. Despite the association of T. denticola with a chronic inflammatory disease, relatively little is known about gingival epithelial cell responses to T. denticola infection. Here, we characterized the transcriptome of gingival keratinocytes following T. denticola challenge and identified interleukin-36γ (IL-36γ) as the most differentially expressed cytokine. IL-36γ expression is regulated by p65 NF-κB and the activation of both the Jun N-terminal protein kinase (JNK) and p38 mitogen-activated protein kinase (MAPK) pathways downstream of Toll-like receptor 2 (TLR2). Finally, we demonstrate for the first time that mitogen- and stress-activated kinase 1 (MSK1) contributes to IL-36γ expression and may link the activation of MAPK and NF-κB signaling. These findings suggest that the interactions of T. denticola with the gingival epithelium lead to elevated IL-36γ expression, which may be a critical inducer and amplifier of gingival inflammation and subsequent alveolar bone loss.
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