Blood Biomarkers and Serologic Immunological Profiles Related to Periodontitis in Abdominal Aortic Aneurysm Patients

BackgroundPeriodontitis is a chronic inflammatory gum disease associated with systemic diseases such as cardiovascular diseases.AimTo investigate the association of systemic blood biomarkers, C-reactive protein (CRP), levels of lipopolysaccharide (LPS), and IgG levels against periodontal pathogens Aggregatibacter actinomycetemcomitans (Aa) and Porphyromonas gingivalis (Pg) with the stability, based on the aortic diameter, the growth rate and the eligibility for surgical intervention, of patients with abdominal aortic aneurysm (AAA).MethodsPatients with stable AAA (n = 30) and unstable AAA (n = 31) were recruited. The anti-A. actinomycetemcomitans and anti-P. gingivalis IgG levels were analyzed by ELISA, the LPS analysis was performed by using the limulus amebocyte lysate (LAL) test, and plasma levels of CRP were determined using an immune turbidimetric method. The association between these blood systemic biomarkers, AAA features, periodontal clinical parameters and oral microbial profiles were explored. Regression models were used to test the relationship between variables.ResultsThe presence of antibodies against Pg and Aa, LPS and high CRP concentrations were found in all AAA patients. The IgG levels were similar in patients with stable and unstable AAA (both for Aa and Pg). Among investigated blood biomarkers, only CRP was associated with AAA stability. The amount of LPS in saliva, supra, and subgingival plaque were significantly associated with the systemic LPS (p <0.05).ConclusionsThis post-hoc study emphasizes the presence of antibodies against Pg and Aa, LPS and high CRP concentrations in all AAA patients. The presence of Pg in saliva and subgingival plaque was significantly associated with the blood LPS levels. For further studies investigating periodontitis and systemic diseases, specific predictive blood biomarkers should be considered instead of the use of antibodies alone.

A Continuous Flow PCR Array Microfluidic Chip Applied for Simultaneous Amplification of Target Genes of Periodontal Pathogens

The concept of time to place conversion makes continuous flow polymerase chain reaction (CF-PCR) microfluidic chip an ideal way to reduce the time required for amplification of target genes, however,...

Systemic Antibiotics Influence Periodontal Parameters and Oral Microbiota, But Not Serological Markers

The use of systemic antibiotics may influence the oral microbiota composition. Our aim was to investigate in this retrospective study whether the use of prescribed antibiotics associate with periodontal status, oral microbiota, and antibodies against the periodontal pathogens. The Social Insurance Institution of Finland Data provided the data on the use of systemic antibiotics by record linkage to purchased medications and entitled reimbursements up to 1 year before the oral examination and sampling. Six different classes of antibiotics were considered. The Parogene cohort included 505 subjects undergoing coronary angiography with the mean (SD) age of 63.4 (9.2) years and 65% of males. Subgingival plaque samples were analysed using the checkerboard DNA-DNA hybridisation. Serum and saliva antibody levels to periodontal pathogens were analysed with immunoassays and lipopolysaccharide (LPS) activity with the LAL assay. Systemic antibiotics were prescribed for 261 (51.7%) patients during the preceding year. The mean number of prescriptions among them was 2.13 (range 1–12), and 29.4% of the prescriptions were cephalosporins, 25.7% penicillins, 14.3% quinolones, 12.7% macrolides or lincomycin, 12.0% tetracycline, and 5.8% trimethoprim or sulphonamides. In linear regression models adjusted for age, sex, current smoking, and diabetes, number of antibiotic courses associated significantly with low periodontal inflammation burden index (PIBI, p < 0.001), bleeding on probing (BOP, p = 0.006), and alveolar bone loss (ABL, p = 0.042). Cephalosporins associated with all the parameters. The phyla mainly affected by the antibiotics were Bacteroidetes and Spirochaetes. Their levels were inversely associated with the number of prescriptions (p = 0.010 and p < 0.001) and directly associated with the time since the last prescription (p = 0.019 and p < 0.001). Significant inverse associations were observed between the number of prescriptions and saliva concentrations of Prevotella intermedia, Tannerella forsythia, and Treponema denticola and subgingival bacterial amounts of Porphyromonas gingivalis, P. intermedia, T. forsythia, and T. denticola. Saliva or serum antibody levels did not present an association with the use of antibiotics. Both serum (p = 0.031) and saliva (p = 0.032) LPS activity was lower in patients having any antibiotic course less than 1 month before sampling. Systemic antibiotics have effects on periodontal inflammation and oral microbiota composition, whereas the effects on host immune responses against the periodontal biomarker species seem unchanged.

The Effects of Porphyromonas gingivalis on Atherosclerosis-Related Cells

Atherosclerosis (AS), one of the most common types of cardiovascular disease, has initially been attributed to the accumulation of fats and fibrous materials. However, more and more researchers regarded it as a chronic inflammatory disease nowadays. Infective disease, such as periodontitis, is related to the risk of atherosclerosis. Porphyromonas gingivalis (P. gingivalis), one of the most common bacteria in stomatology, is usually discovered in atherosclerotic plaque in patients. Furthermore, it was reported that P. gingivalis can promote the progression of atherosclerosis. Elucidating the underlying mechanisms of P. gingivalis in atherosclerosis attracted attention, which is thought to be crucial to the therapy of atherosclerosis. Nevertheless, the pathogenesis of atherosclerosis is much complicated, and many kinds of cells participate in it. By summarizing existing studies, we find that P. gingivalis can influence the function of many cells in atherosclerosis. It can induce the dysfunction of endothelium, promote the formation of foam cells as well as the proliferation and calcification of vascular smooth muscle cells, and lead to the imbalance of regulatory T cells (Tregs) and T helper (Th) cells, ultimately promoting the occurrence and development of atherosclerosis. This article summarizes the specific mechanism of atherosclerosis caused by P. gingivalis. It sorts out the interaction between P. gingivalis and AS-related cells, which provides a new perspective for us to prevent or slow down the occurrence and development of AS by inhibiting periodontal pathogens.

Toward Personalized Oral Diagnosis: Distinct Microbiome Clusters in Periodontitis Biofilms

Periodontitis is caused by pathogenic subgingival microbial biofilm development and dysbiotic interactions between host and hosted microbes. A thorough characterization of the subgingival biofilms by deep amplicon sequencing of 121 individual periodontitis pockets of nine patients and whole metagenomic analysis of the saliva microbial community of the same subjects were carried out. Two biofilm sampling methods yielded similar microbial compositions. Taxonomic mapping of all biofilms revealed three distinct microbial clusters. Two clinical diagnostic parameters, probing pocket depth (PPD) and clinical attachment level (CAL), correlated with the cluster mapping. The dysbiotic microbiomes were less diverse than the apparently healthy ones of the same subjects. The most abundant periodontal pathogens were also present in the saliva, although in different representations. The single abundant species Tannerella forsythia was found in the diseased pockets in about 16–17-fold in excess relative to the clinically healthy sulcus, making it suitable as an indicator of periodontitis biofilms. The discrete microbial communities indicate strong selection by the host immune system and allow the design of targeted antibiotic treatment selective against the main periodontal pathogen(s) in the individual patients.

Statistical Study Regarding the Presence of Gram Bacteria in Patients with Cardiovascular Disease and Periodontal Disease

Pathogenic bacteria, originating in the inflamed periodontium, can make their way into the body through the vascular system, either by entering the bloodstream or lymph directly or as internalized particles of immune cells. This research aims to investigate the existence of a potential connection between two pathologies – periodontitis and ischemic heart disease – by utilizing a DNA-DNA hybridization technique to highlight the presence of seven periodontal pathogens: A. actinomycetemcomitans, P. gingivalis, P. endodontalis, P. intermedia, T. forsythia, C. rectus and F. Nucleatum. The study was conducted over a period of 3 years on a sample consisting of 119 patients with cardiovascular disease and periodontal disease, divided into 3 groups by pathologies, as follows: the first group consisted of 31 patients with ischemic cardiomyopathy, the second group consisted of 43 patients with periodontal disease and ischemic cardiomyopathy, and the third group consisted of 45 patients with periodontal disease. The results show the possibility of a correlation between the composition of the bacterial flora in the group of patients with cardiac disease and those with associated pathologies. In conclusion, we may state that periodontitis may be seen as a risk factor in heart disease, which may certify the possibility of an etiological connection between the two pathologies.

Periodontal Findings in Children with Cleft Lip and Palate: A Systematic Review

A cleft lip occurs when the tissues that compose the lip fail to fuse together before delivery. There is a gap in the upper lip in the case of a cleft lip. An affected child may also have a cleft palate if they have a cleft lip. The condition is also sometimes diagnosed after birth. A cleft palate sometimes takes a long time to be diagnosed (such as sub mucous cleft palates and bifid uvulas). The surgical repair of a child's face can improve their breathing, hearing, and even their speech and language skills. Using the Medline and PubMed Central databases, this study examined periodontal findings in children with clefted lip and palate using a systematic literature search in English. All search terms were in English and were applicable to the articles related to periodontal findings in children with cleft lip and palate. To electronically extract data from Medline and PubMed Central, an electronic form is designed by the principal investigator. Upon screening using filters, inclusion and exclusion criteria, around 6 articles were selected related in this study. These articles were systematically reviewed and analyzed using PRISMA. When a child has a cleft lip or palate, it affects oral hygiene and the amount of periodontal pathogens in the oral biofilm. In the literature, there is a lack of studies which utilize validated, reliable measures to determine how individuals with oral clefts perceive their quality of life. It will be important to perform additional studies that utilize specific tools for assessing Quality of Life in patients with oral clefts with larger samples in hopes of better understanding their Quality of Life.

Vitamin D in periodontology

Generalized periodontitis is one of the most common dental diseases that can lead to tooth mobility and tooth loss. Plaque is main etiological factor, but periodontitis is a multifactorial disease. There are data on the effect of vitamin D levels on generalized periodontitis. Vitamin D has a pleiotropic effect by affecting various links in the pathogenesis of generalized periodontitis. Stimulating the secretion of antimicrobial peptides, vitamin D increases local immunity and adversely affects periodontal pathogens; modulating the immune system, it affects inflammation in periodontal tissues and the immune response; increasing the absorption of calcium and reducing the release of parathyroid hormone, vitamin D stimulates bone mineralization. The high prevalence of vitamin D deficiency and insufficiency worldwide indicates the relevance of studying its effects on the human body in general and the oral cavity in particular.