scholarly journals Animal Models for Periodontal Disease

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Helieh S. Oz ◽  
David A. Puleo
Keyword(s):  
Animal Models ◽  
Periodontal Disease ◽  
Alveolar Bone ◽  
Cultured Cells ◽  
Periodontal Diseases ◽  
Oral Bacteria ◽  
Host Responses ◽  
Advantages And Disadvantages ◽  
Wide Range

Animal models and cell cultures have contributed new knowledge in biological sciences, including periodontology. Although cultured cells can be used to study physiological processes that occur during the pathogenesis of periodontitis, the complex host response fundamentally responsible for this disease cannot be reproducedin vitro. Among the animal kingdom, rodents, rabbits, pigs, dogs, and nonhuman primates have been used to model human periodontitis, each with advantages and disadvantages. Periodontitis commonly has been induced by placing a bacterial plaque retentive ligature in the gingival sulcus around the molar teeth. In addition, alveolar bone loss has been induced by inoculation or injection of human oral bacteria (e.g.,Porphyromonas gingivalis) in different animal models. While animal models have provided a wide range of important data, it is sometimes difficult to determine whether the findings are applicable to humans. In addition, variability in host responses to bacterial infection among individuals contributes significantly to the expression of periodontal diseases. A practical and highly reproducible model that truly mimics the natural pathogenesis of human periodontal disease has yet to be developed.

Bone Invasive Properties of Oral Squamous Cell Carcinoma and its Interactions with Alveolar Bone Cells: An In Vitro Study

2019 ◽  
Vol 19 (8) ◽  
pp. 631-640 ◽  
Author(s):  
Omel Baneen Qallandar ◽  
Faeza Ebrahimi ◽  
Farhadul Islam ◽  
Riajul Wahab ◽  
Bin Qiao ◽  
...  
Keyword(s):  
Squamous Cell Carcinoma ◽  
Oral Squamous Cell Carcinoma ◽  
Cell Carcinoma ◽  
Cancer Cells ◽  
Alveolar Bone ◽  
Cultured Cells ◽  
Bone Cells ◽  
Bone Invasion ◽  
Alveolar Bone Cells

Background: Co-culture of cancer cells with alveolar bone cells could modulate bone invasion and destructions. However, the mechanisms of interaction between oral squamous cell carcinoma (OSCC) and bone cells remain unclear. Objective: The aim of this study is to analyse the direct and indirect effects of OSCC cells in the stimulation of osteolytic activity and bone invasion. Methods: Direct co-culture was achieved by culturing OSCC (TCA8113) with a primary alveolar bone cell line. In the indirect co-culture, the supernatant of TCA8113 cells was collected to culture the alveolar bone cells. To assess the bone invasion properties, in vitro assays were performed. Results: The proliferation of co-cultured cancer cells was significantly (p<0.05) higher in comparison to the monolayer control cells. However, the proliferation rates were not significantly different between direct and indirect co-cultured cells with indirect co-cultured cells proliferated slightly more than the direct co-cultured cells. Invasion and migration capacities of co-cultured OSCC and alveolar bone cells enhanced significantly (p<0.05) when compared to that of control monolayer counterparts. Most importantly, we noted that OSCC cells directly co-cultured with alveolar bone cells stimulated pronounced bone collagen destruction. In addition, stem cells and epithelialmesenchymal transition markers have shown significant changes in their expression in co-cultured cells. Conclusion: In conclusion, the findings of this study highlight the importance of the interaction of alveolar bone cells and OSCC cells in co-culture setting in the pathogenesis of bone invasion. This may help in the development of potential future biotherapies for bone invasion in OSCC.

scholarly journals Periodontal Disease in Medically Compromised Patients and Its Relation with Covid-19

2021 ◽  
Vol 10 (20) ◽  
pp. 1558-1560
Author(s):  
Gowri Swaminatham Pendyala ◽  
Pradeep Kumar ◽  
Sourabh Ramesh Joshi ◽  
Sonia Godara ◽  
Shridhar Shetty
Keyword(s):  
Periodontal Disease ◽  
Alveolar Bone ◽  
Kidney Diseases ◽  
Periodontal Diseases ◽  
Respiratory Illness ◽  
Viral Disease ◽  
Oral Health Status ◽  
Comorbid Conditions ◽  
And Gender ◽  
Compromised Patients

Periodontal diseases can have systemic effects on our body. Diabetes, cardiovascular disease, hypertension etc., have a history of being associated with periodontal disease. Periodontal disease could indicate the severity of Covid-19. There has been no previous reporting of oral health status in Covid-19 patients. The knowledge of association of periodontal disease with severe Covid-19 could be an important contribution to slowing down the rate and spread of infection. Periodontal disease is an inflammatory disease which involves gingiva and the supporting tissues like cementum, alveolar bone and periodontal ligament. It has affected nearly about 10 - 12 % of the total population in the world. Periodontal disease is more prevalent in medically compromised patients with diseases like asthma, diabetes, hypertension, cardiovascular diseases, liver diseases, kidney diseases and rheumatoid arthritis. The other risk factors for the occurrence of periodontal disease are tobacco smoking, ageing, poor oral hygiene, obesity etc.1 Coronavirus (CoV) belongs to Coronaviridae family which are RNA viruses. Their size varies from 60 - 140 nanometre with spike-like projections on its surface. This strain of viruses is considered to be zoonotic in nature and cause respiratory illness in humans.1 This viral disease has affected lakhs of people in United States and had resulted in a high mortality rate. It was declared a pandemic by WHO on the 11th of March 2020. Comorbid conditions such as diabetes, hypertension, asthma, ageing, obesity and gender pose a greater risk for Covid-19. We wanted to evaluate as to whether periodontal disease along with comorbid conditions share a contributing risk factor for developing Covid-19.

Abstract 180: Increased Atherosclerosis Associated with Periodontal Disease Is Mediated by CD36

2012 ◽  
Vol 32 (suppl_1) ◽  
Author(s):  
Maria Febbraio ◽  
Paul M Brown
Keyword(s):  
Periodontal Disease ◽  
Alveolar Bone ◽  
Inflammatory Responses ◽  
Disease Risk ◽  
Plasma Cholesterol ◽  
Atherosclerotic Lesion ◽  
Pcr Analysis ◽  
Modified Ldl ◽  
Oxidatively Modified

We previously showed that inflammation, and not hyperlipidemia alone, was necessary for CD36 dependent atherogenesis. Chronic periodontal disease is characterized by a persistent inflammatory state and is epidemiologically associated with cardiovascular disease. We hypothesize that CD36 is an essential link between periodontal disease and atherosclerosis. Low density lipoprotein receptor knock out (LDLR KO) mice and CD36/LDLR double KO mice were infected with the periodontal disease associated bacteria, Porphyromonas gingivalis (Pg), by oral lavage and fed a Western diet for 12 weeks (n = 7-14/group). We assessed periodontal disease, risk factors associated with atherosclerosis, and lesion burden. We conducted studies in isolated macrophages to understand mechanistic differences between the groups. Wild type and CD36 KO macrophages equally phagocytosed bacteria. We measured the cemento-enamel junction of each molar to assess periodontal disease and found that it was significantly increased in infected mice compared with uninfected controls. Histological analysis showed neutrophil, osteoclast and macrophage infiltrates in the alveolar bone of infected mice. Differences in plasma cholesterol, triacylglycerol, insulin resistance and weight gain did not necessarily track with atherosclerosis burden, however blood neutrophils and cytokines were increased in infected LDLR KO mice compared with all other groups. Infected LDLR KO mice had significantly increased atherosclerotic lesion burden compared with uninfected LDLR KO mice, and all of the increased lesion was CD36 dependent. PCR analysis found no evidence for direct infection of atherosclerotic lesions by Pg. In vitro macrophage studies showed that heat killed Pg, lipopolysaccharide (LPS) derived from Pg, oxidatively modified LDL or plasma from infected mice, could not activate the NALP3 inflammasome. Combining heat killed Pg or Pg LPS with oxidatively modified LDL or plasma from infected mice, however, led to significant IL-1 beta secretion that was CD36 and NFkB dependent. Our data suggest that atherosclerosis associated with periodontal disease is mediated by cellular inflammatory responses involving both CD36 and Toll-like receptor.

scholarly journals Age and oral health: current considerations

2007 ◽  
Vol 21 (spe) ◽  
pp. 29-33 ◽  
Author(s):  
Andrew Tawse-Smith
Keyword(s):  
Risk Factors ◽  
Periodontal Disease ◽  
Dental Plaque ◽  
Alveolar Bone ◽  
Periodontal Diseases ◽  
The Elderly ◽  
Preventive Program ◽  
Age Related ◽  
The Individual ◽  
Complex Scenario

Dental plaque is still considered the main etiological factor for periodontal diseases. Our understanding of periodontal disease has advanced from the previous concepts where gingivitis slowly progressed to periodontitis to a more complex scenario that correlates several risk factors in the pathogenesis of periodontal disease. Among these factors, age has been associated with increased rates of periodontal disease as the population gets older. Although the loss of alveolar bone and periodontal attachment is common in the elderly population, and there is evident age-related changes in the periodontium, severe periodontitis is not a natural consequence of ageing. The importance of identifying the risk factors that participate in the pathogenesis of periodontal disease at an early phase, both of the individual and the disease, as well as evaluating the capacity of the individual to control dental plaque will enable the implementation of an adequate preventive program, where the needs and limitations of the individual are considered to specifically tailor the oral hygiene procedures and the mouthwashes to be used.

scholarly journals ROLE OF ANIMAL MODELS IN PERIODONTAL RESEARCH - A REVIEW

2018 ◽  
Vol 11 (7) ◽  
pp. 47
Author(s):  
Sarah ` Banu ◽  
Jaiganesh Ramamurthy
Keyword(s):  
Animal Models ◽  
Early Stage ◽  
Periodontal Diseases ◽  
Human Anatomy ◽  
Anatomy And Physiology ◽  
Advantages And Disadvantages ◽  
Human Anatomy And Physiology ◽  
Large Animals ◽  
Periodontal Research

Periodontal diseases require treatment at an early stage to prevent further damage and aggravation of the disease. The most commonly seen periodontal diseases are gingivitis and periodontitis. Animals have contributed a major role in studying the different periodontal diseases and providing a proper treatment. Periodontal diseases are either induced in these experimental animal models or can be seen naturally. Different drugs are tested on the animals induced by the disease to find the most effective treatment for that particular disease. Different animals such as mice, rats, pigs, rabbits, hamsters, and rodents are used for the periodontal research. Different animals show a different reaction while some animals show no reaction. Each animal has its own advantages and disadvantages. The use of large animals brings a limitation in the due to its housing difficulties. Animals for periodontal research are chosen depending on their similarity with that of human anatomy and physiology. The use of these animals will help to replicate the disease seen in humans in a better and more accurate way. This will improve the treatment outcome and the prognosis of the disease. The drugs used can, hence, give a better idea about the effect it would have on the human body depending on the effects it shows on the animal models. Hence, the use of appropriate animals for the periodontal research is important to design a better treatment for these diseases. Hence, animal models play an important role in the periodontal research.

scholarly journals The Pomegranate: Effects on Bacteria and Viruses That Influence Human Health

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Amy B. Howell ◽  
Doris H. D'Souza
Keyword(s):  
Antimicrobial Activity ◽  
Foodborne Pathogens ◽  
Clinical Results ◽  
Multidrug Resistant ◽  
Antimicrobial Activities ◽  
Oral Bacteria ◽  
Resistant Bacteria ◽  
Wide Range

Pomegranates have been known for hundreds of years for their multiple health benefits, including antimicrobial activity. The recent surge in multidrug-resistant bacteria and the possibility of widespread global virus pandemics necessitate the need for additional preventative and therapeutic options to conventional drugs. Research indicates that pomegranates and their extracts may serve as natural alternatives due to their potency against a wide range of bacterial and viral pathogens. Nearly every part of the pomegranate plant has been tested for antimicrobial activities, including the fruit juice, peel, arils, flowers, and bark. Many studies have utilized pomegranate peel with success. There are various phytochemical compounds in pomegranate that have demonstrated antimicrobial activity, but most of the studies have found that ellagic acid and larger hydrolyzable tannins, such as punicalagin, have the highest activities. In some cases the combination of the pomegranate constituents offers the most benefit. The positive clinical results on pomegranate and suppression of oral bacteria are intriguing and worthy of further study. Much of the evidence for pomegranates’ antibacterial and antiviral activities against foodborne pathogens and other infectious disease organisms comes fromin vitrocell-based assays, necessitating further confirmation ofin vivoefficacy through human clinical trials.

scholarly journals Stem Cells for Cartilage Repair: Preclinical Studies and Insights in Translational Animal Models and Outcome Measures

2018 ◽  
Vol 2018 ◽  
pp. 1-22 ◽  
Author(s):  
Melissa Lo Monaco ◽  
Greet Merckx ◽  
Jessica Ratajczak ◽  
Pascal Gervois ◽  
Petra Hilkens ◽  
...  
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Animal Models ◽  
Outcome Measures ◽  
Cartilage Repair ◽  
Cartilage Tissue ◽  
Preclinical Studies ◽  
Paracrine Factors ◽  
Advantages And Disadvantages

Due to the restricted intrinsic capacity of resident chondrocytes to regenerate the lost cartilage postinjury, stem cell-based therapies have been proposed as a novel therapeutic approach for cartilage repair. Moreover, stem cell-based therapies using mesenchymal stem cells (MSCs) or induced pluripotent stem cells (iPSCs) have been used successfully in preclinical and clinical settings. Despite these promising reports, the exact mechanisms underlying stem cell-mediated cartilage repair remain uncertain. Stem cells can contribute to cartilage repair via chondrogenic differentiation, via immunomodulation, or by the production of paracrine factors and extracellular vesicles. But before novel cell-based therapies for cartilage repair can be introduced into the clinic, rigorous testing in preclinical animal models is required. Preclinical models used in regenerative cartilage studies include murine, lapine, caprine, ovine, porcine, canine, and equine models, each associated with its specific advantages and limitations. This review presents a summary of recentin vitrodata and fromin vivopreclinical studies justifying the use of MSCs and iPSCs in cartilage tissue engineering. Moreover, the advantages and disadvantages of utilizing small and large animals will be discussed, while also describing suitable outcome measures for evaluating cartilage repair.

scholarly journals Effects of Colocasia antiquorum var. Esculenta Extract In Vitro and In Vivo against Periodontal Disease

Medicina ◽  
2021 ◽  
Vol 57 (10) ◽  
pp. 1054
Author(s):  
Seong-Hee Moon ◽  
Seong-Jin Shin ◽  
Hyun-Jin Tae ◽  
Seung-Han Oh ◽  
Ji-Myung Bae
Keyword(s):  
Bone Loss ◽  
Periodontal Disease ◽  
Pathogenic Bacteria ◽  
Alveolar Bone ◽  
Negative Control ◽  
Alveolar Bone Loss ◽  
Oral Microbiome ◽  
Control Group

Background and Objectives: Periodontal disease is a chronic inflammatory disease in which gradual destruction of tissues around teeth is caused by plaque formed by pathogenic bacteria. The purpose of this study was to evaluate the potential of 75% ethanol extract of Colocasia antiquorum var. esculenta (CA) as a prophylactic and improvement agent for periodontal disease in vitro and in vivo. Materials and Methods: The antimicrobial efficacy of CA against Porphyromonas gingivalis (P. gingivalis, ATCC 33277) was evaluated using minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) test, and cytotoxicity was confirmed by CCK-8 assay. For the in vivo study, P. gingivalis was applied by oral gavage to BALB/c mice. Forty-two days after the first inoculation of P. gingivalis, intraoral swabs were taken for microbiome analysis, and the mice were sacrificed to evaluate the alveolar bone loss. Results: The MIC of CA against P. gingivalis was 31.3 μg/mL, the MBC was 62.5 μg/mL, with no cytotoxicity. The diversity of the oral microbiome decreased in the positive control group, while those of the VA (varnish) and VCA (varnish added with CA) groups increased as much as in the negative control group, although the alveolar bone loss was not induced in the mouse model. Conclusions: CA showed antibacterial effects in vitro, and the VA and VCA groups exhibited increased diversity in the oral microbiome, suggesting that CA has potential for improving periodontal disease.

Research on Oral Diseases and Its Impact On Dental Education and Practice

1988 ◽  
Vol 2 (2) ◽  
pp. 199-203 ◽  
Author(s):  
H. Löe
Keyword(s):  
Oral Health ◽  
Recombinant Dna ◽  
Dental Education ◽  
Periodontal Diseases ◽  
Epidemiological Studies ◽  
Oral Bacteria ◽  
Oral Diseases ◽  
Dental Research ◽  
Tissue Repair And Regeneration ◽  
Wide Range

In recent years advances in dental research have marked the integration of dental science into the mainstream of biomedical research, with dental investigators employing the same cell and molecular biology techniques that have revolutionized the biosciences. Examples include the isolation and cloning of genes essential to the development of teeth and bones, discoveries of numerous extracellular factors that guide the growth and differentiation of cells and aid in tissue repair and regeneration, the development of a technique for producing human monoclonal antibodies, and the use of recombinant DNA techniques to generate mutant forms of oral bacteria. At the same time, dental research continues to make strides in more traditional pursuits. Thus, we are seeing continued advances in dental diagnostics, in the generation of new materials and methods for restorations and replacements of natural teeth, and an increase in approaches aimed at preventing or reversing the major dental diseases: dental caries and the periodontal diseases. Recent epidemiological studies highlight the gains that have been made in the oral health status of Americans and are helping shape the research agenda of the National Institute of Dental Research in the years ahead. Greater emphasis will be put on the oral health problems of adults and older Americans and those of any age who are at high risk for oral problems. Advances in research, evident in changing patterns of disease, have become the major force for change in dental education and practice. Future practitioners will need a broader intellectual preparation that will enable them to diagnose and treat a wide range of oral tissue conditions. Many dental schools are showing their willingness and ability to rise to the challenge of changing demands, assuring a promising future for the "new dentistry".

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