scholarly journals THE USE OF MOLECULAR AND BIOCHEMICAL MARKERS OF BONE METABOLISM FOR SCREENING OF DENTAL HEALTH OF THE POPULATION

2020 ◽  
pp. 24-28
Author(s):  
O.O. Sydorenko ◽  
S.V. Pavlov ◽  
O.V. Voznyi

At present, the research interests of both dentists and clinical laboratory diagnosticians lie in the field of using oral fluid as an object of diagnostic estimation of molecular and biochemical markers in oral cavity diseases. It is commonly known that oral fluid has both organic and non-organic components. Non-organic components of saliva are represented by macro- and microelements that can be parts of various compounds or stay in the ionized form. Organic components are represented by proteins, carbohydrates, lipids, essential nitrogenous compounds (urea and uric acid), vitamins, hormones, organic and nucleic acids. Compared with the traditional method of blood testing, the identification of markers in the oral fluid has several advantages. They are non-invasiveness, atraumatic character for the patient, the absence of stress typical of venipuncture; simpler conditions of storage and transportation due to the liquid state (unlike whole blood, which tends to coagulate); being able to take biological material an unlimited number of times; no need for qualified personnel and special equipment when taking oral fluid. The introduction of biological markers into the complex of dental checkups is one of the topical tasks of modern dentistry and clinical laboratory diagnostics. This is particularly important for those dental patients whose living or working conditions are accompanied by harmful chemical factors. The authors have performed complex research of lactoferrin, cathelicidin, and MMP8 present in the oral fluid of 50 patients who worked under harmful conditions (group 1), and of other 50 patients whose work is not associated with the harmful influence of chemical factors (group 2). The oral fluid was collected on an empty stomach in the morning by spitting into a sterile glass tube. The biomass was centrifuged and stored at 300C, and the amount of lactoferrin (Hycto Biotech, the Netherlands), cathelicidin (Hycult Biotech, the Netherlands), and MMP8 (Matrix Metalloproteinase-8) was determined in the test samples. The analysis was performed by enzyme-linked immunosorbent assay based on the use of a "sandwich" variant of solid-phase enzyme-linked immunosorbent assay. The procedure was performed on the enzyme-linked immunosorbent assay ImmunoChem-2100 (USA). The analysis was performed in 96-well microplates, the bottom of the wells was covered with monoclonal antibodies to the corresponding molecular marker. The analysis of the oral cavity condition in patients of both groups demonstrated the presence of caries (100 % of group 1 patients, 80% of group 2 patients) and partial adentia (75% of group 1 patients, 60% of group 2 patients). Secondary to the above-mentioned abnormalities, group 1 and 2 patients had periodontal diseases. Such abnormalities were registered in 87% of group 1 patients; in group 2 patients, such changes were less explicit and were present in 67% of the patients. On the contrary, it was established that the patients of both groups presented with a statistically significant increase of lactoferrin in the oral fluid (on average, 81% and 40% higher, respectively, in groups 1 and 2) and MMP8 (64% and 24% higher), as well as a decrease in cathelicidin concentration (87% and 42% lower) in comparison with the patients of group 3. The established pathological biochemical changes indicate pathological processes in the oral cavities of the research groups of patients. In modern practice, Lf is used as an organ-specific marker of the activation of a pathological process to diagnose and predict the course of mucosal and periodontal diseases. At the same time, the decrease in oral cathelicidin LL37 reflects the suppression of local immunity in the oral cavity and is regarded as a pathogenic chain in the progression of diseases of the mucosa, periodontium, including dental caries in patients. Similar dynamics of cathelicidin in group 1 patients, in our opinion, explains the intensity of oral disease development in this category of patients. Thus, neutrophils and macrophages die under the action of aggressive chemical factors, as a result of which the pool of antimicrobial peptides, including cathelicidin, decreases. The present markers determine the topicality and great potential of further research of the given molecular markers for both fundamental investigations and understanding the pathogenesis of oral cavity diseases in this category of patients. Besides, these indices can be used as independent markers for diagnosis, screening, and effective treatment of oral cavity diseases.

2019 ◽  
Vol 34 (6) ◽  
pp. 309-312 ◽  
Author(s):  
Senem Ayça ◽  
Halil Ural Aksoy ◽  
İsmail Taştan ◽  
Muzaffer Polat

Levels of melatonin have been reported before in children with epilepsy, but such has not been reported to date in those with continuous spikes and waves during sleep. The aim of the present study was to assess serum melatonin levels and melatonin circadian rhythm in patients with continuous spikes and waves during sleep and epilepsy. Serum melatonin was measured in 39 children stratified into 3 groups. Group 1 included 15 patients with continuous spikes and waves during sleep, group 2 included 12 epilepsy patients, and group 3 included 12 controls, respectively. Blood samples were taken from all participants at 1:00 am and 9:00 am and melatonin levels were measured using a quantitative enzyme-linked immunosorbent assay test. The 9:00 am melatonin levels of group 1 were significantly decreased and pair groups were compared. The Pa value (representing a comparison between groups 1 and 2) was .002, the Pb value (representing a comparison between groups 1 and 3) was .001, and the Pc value (representing a comparison between groups 2 and 3) was .86. These findings suggest that the 9:00 am melatonin levels were significantly decreased in the comparison of groups 2 and 3. Further detailed research is necessary to determine the factors leading to the rapid decline of morning melatonin levels of children with continuous spikes and waves during sleep.


2002 ◽  
pp. 809-814 ◽  
Author(s):  
J Tani ◽  
K Mori ◽  
S Hoshikawa ◽  
T Nakazawa ◽  
J Satoh ◽  
...  

OBJECTIVE: Interferon regulatory factor-1 (IRF-1) is a critical regulator of interferon-gamma(IFNgamma)-mediated immune responses. To determine whether IRF-1 is involved in the pathogenesis of thyroiditis in animal models, we evaluated the incidence of iodide-induced lymphocytic thyroiditis (LT) in non-obese diabetic (NOD) mice lacking IRF-1 as well as IRF-1 +/+ and +/- mice. DESIGN: IRF-1 +/+, +/- and -/- NOD mice at 6 weeks of age were fed water (group 1) or iodide water (group 2) for 8 weeks. METHODS: Thyroids were examined histopathologically and intrathyroidal lymphocytic infiltration was arbitrarily graded. Serum thyroxine (T(4)) and anti-mouse thyroglobulin antibody (anti-mTgAb) levels were measured. Spleen cell population was analyzed by flow cytometry, and IFNgamma and interleukin-10 produced by splenocytes were measured by enzyme-linked immunosorbent assay. RESULTS: In group 1, only 4.3% of NOD mice developed LT. In contrast, 67.6% of mice in group 2 developed the disease. Iodide treatment induced LT in more than 80% of IRF-1 +/+ and +/- mice. However, no IRF-1 -/- mice in group 2 developed LT. There was no difference in both serum anti-mTgAb and T(4) levels among the three IRF-1 genotypes of NOD mice. Numbers of splenic CD8(+) T cells and IFNgamma production by Concanavalin A-stimulated splenocytes were markedly decreased in IRF-1-deficient NOD mice. CONCLUSIONS: IRF-1 is involved in the development of iodide-induced LT in NOD mice.


2020 ◽  
Vol 10 (2) ◽  
pp. 368-374
Author(s):  
I. V. Nesterova ◽  
M. N. Mitropanova ◽  
G. A. Chudilova ◽  
S. V. Kovaleva ◽  
E. O. Khalturina

It is known that children with congenital cleft lip and palate are suffering from recurrent respiratory infections, which worsen the state of their health, and also complicate the results of reconstructive surgical treatment. The aim of the study was to detect defects of mucosal immunity in children with congenital cleft lip and palate, suffering from recurrent respiratory infections, and to create the program of local interferon corrective therapy with an assessment of its effectiveness. The studies included 56 children from the age of 1 to 3 years. Three groups of children were formed: group 1 – 26 children with congenital cleft lip and palate (antibiotic therapy); group 2 — 30 children with congenital cleft lip and palate (antibiotic therapy + local interferon therapy), group 3 — the control group. The clinical examination included a medical history, an assessment of the symptoms of recurrent episodes of acute respiratory infections and exacerbations of chronic infections. Microbiological studies were performed using standard methods. The status of local immunity was detected: the concentrations of secretory IgA, cytokines IL-17, IL-4, IL-6, IL-1β, IFNγ in the oral fluid were tested by ELISA. Results of the study established that in group 1 and group 2 clinical criteria of immunodeficiency with an infectious syndrome were revealed: repeated acute respiratory viral infections from 10 or more times a year, complicated by frequent exacerbations of chronic bacterial infection (up to 10 or more per year). Assessment of the state of local immunity in children with congenital cleft lip and palate revealed a lack of sIgA compared with the control group. Before treatment in group 2 oral fluid level of IL-17, IL-6 were statistically significant increase (p < 0.05); the results of the study also established increase in the level of IL-1β and a decrease in anti-inflammatory IL-4 and regulatory IFNγ relative to the control group (p > 0.05). After complex treatment with the inclusion of local interferon therapy in group 2 the appearance of sIgA, increase in the concentration of IL-4, IL-1β and a decrease IL-17 in oral fluid were observed (p > 0.05). The concentrations of IL-6, IFNγ did not change (p > 0.05). After treatment in group 2 there were a decrease in exacerbations of chronic upper respiratory tract infection and in frequency of acute respiratory viral infections compared with group 1 (p < 0.05). Positive clinical efficacy of local interferon therapy (the gel of recombinant IFNα2b in combination with oxidants — Viferon gel) in the process of staged rehabilitation of children with congenital cleft lip and palate has a protective clinical effect in reducing the frequency of acute respiratory viral infections, reducing the number of postoperative complications, reducing hospital stay, duration of antibacterial therapy and the number of exacerbations of chronic bacterial infection.


2021 ◽  
Author(s):  
Noah Kojima ◽  
Arash Roshani ◽  
Matthew Brobeck ◽  
Arthur Baca ◽  
Jeffrey D Klausner

Introduction: The protective effect of previous infection versus vaccination is poorly studied. Among a clinical laboratory that has been conducting routine workforce screening since the beginning of the pandemic, we aimed to assess the relative risk of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) infection among individuals who were SARS-CoV-2 naive, previously infected, or vaccinated. Methods: Using an electronic laboratory information system, employees were divided into three groups: (1) SARS-CoV-2 naive and unvaccinated, (2) previous SARS-CoV-2 infection, and (3) vaccinated. Person-days were measured from the date of the employee first test and truncated at the end of the observation period. SARS-CoV-2 infection was defined as two positive SARS-CoV-2 PCR tests in a 30-day period. Individuals with fewer than 14 days of follow up were excluded. Incidence estimates and the 95% confidence intervals were calculated using the Poisson Exact equation. The incidence rate ratio (IRR) was used as a measure of association between groups. Analyses were performed on StataSE (StataCorp, College Station, TX). Results: We identified 4313, 254 and 739 employee records for groups 1, 2, and 3, respectively. The median age of employees was 29.0 years (interquartile range: 23.6, 39.9). During the observation period, 254, 0, and 4 infections were identified among groups 1, 2, and 3, respectively. Group 1 had an incidence of 25.9 per 100 person-years (95% CI: 22.8-29.3). Group 2 had an incidence of 0 per 100 person-years (95% CI: 0-5.0). Group 3 had an incidence of 1.6 per 100 person-years (95% CI: 0.04-4.2). The IRR of reinfection among those with previous infection compared to SARS-CoV-2 naive was 0 (95% CI: 0-0.19). The IRR of those vaccinated compared to SARS-CoV-2 naive was 0.06 (95% CI: 0.02-0.16). The IRR of those vaccinated compared to prior SARS-CoV-2 was 0 (95% CI: 0-4.98). Conclusion: Previous SARS-CoV-2 infection and vaccination for SARS-CoV-2 were associated with decreased risk for infection or re-infection with SARS-CoV-2 in a routinely screened workforce. The was no difference in the infection incidence between vaccinated individuals and individuals with previous infection. Further research is needed to determine whether our results are consistent with the emergence of new SARS-CoV-2 variants.


Folia Medica ◽  
2021 ◽  
Vol 63 (3) ◽  
pp. 400-404
Author(s):  
Tanya Bozhkova

Introduction: Bruxism&nbsp;is an involuntary&nbsp;parafunctional&nbsp;habit performed unconsciously during sleep by the jaw muscles in which the tooth rows are pressed against each other and move horizontally. The symptoms in the oral cavity are slightly elusive which makes it difficult to diagnose.Aim: The aim of this study was to analyze the occlusion and disocclusion times in young adults affected by bruxism compared with healthy subjects.Materials and methods: Thirty-four patients (15 men and 19 women) aged between 20-25 years were included in the study. They were allocated into two groups: group 1 &ndash; controls (n=13), and group 2 &ndash; patients who reported clenching or grinding their teeth (n=21). The study was conducted using a T-Scan Novus occlusion diagnostic device. The results obtained for the occlusion and disocclusion times were analyzed using the latest version of the T-Scan system software (ver. 9.1). The values for occlusion and disocclusion times of all subjects were recorded in the T-Scan.Results: The occlusion times in the control group were found to be longer than those in the bruxism group. The disocclusion times of the subjects in group 1 were found to be shorter than those in group 2.Conclusions: The T-Scan system makes it possible to quantify the occlusion and disocclusion times, which helps to diagnose an initial form of bruxism in individuals at a young age.


2020 ◽  
Vol 73 (2) ◽  
pp. 259-265
Author(s):  
Oleksandr M. Khvysyuk ◽  
Volodymyr O. Babalian ◽  
Serge B. Pavlov ◽  
Galina B. Pavlova

The aim of this study is to identify the dependence of the result of surgical treatment of patients of elderly and senile age with fractures of the proximal femur on the characteristics of the response cytokine-mediated regulatory response to trauma and surgery. Materials and methods: In 74 patients after hip arthroplasty, serum levels of bone metabolism markers were determined using enzyme-linked immunosorbent assay. Patients were divided into 2 groups depending on the results of treatment. Results: It was found that compared with group 2 (treatment outcome is worse) in group 1 (treatment outcome is better) there was a greater number of correlations. In group 1, correlations were found between OPG and RANKL (r = 0.88; p = 0.000), OPG and OPG/RANKL (r = 0.44; p = 0.006), TGF-β1 and OPG/RANKL (r = 0.66; p = 0.000) , IL-6 and OPG (r = 0.67; p = 0.000), IL-6 and RANKL (r = 0.53; p = 0.001), IL-6 and OPG/RANKL (r = 0.39; p = 0.016). In group 2, only between OPG and OPG/RANKL (r = 0.72; p = 0.000), RANKL and OPG/RANKL (r = −0.53; p = 0.0007). In patients of group 2, there was a decrease in the level of OPG relative to the control and a less significant increase in TGF-β1 and IL-6 relative to group 1. Conclusion: The prognosis of the results of treatment of patients with proximal femur fractures is largely determined by the nature of the adaptive response to injury and the implant, the synchronism of the mechanism of stress remodeling of the bone. A less favorable prognosis after arthroplasty is associated with exacerbation of the initial metabolic disorders in the bone tissue due to severe cytokine-mediated dysfunction of the regulatory pathways.


1990 ◽  
Vol 36 (2) ◽  
pp. 192-197 ◽  
Author(s):  
W L Wong ◽  
D L Eaton ◽  
A Berloui ◽  
B Fendly ◽  
P E Hass

Abstract Lipoprotein(a) [Lp(a)] is a low-density lipoprotein (LDL)-like lipoprotein particle recently described as a risk factor for premature coronary heart disease, stroke, and atherosclerosis. Structurally, Lp(a) is similar to LDL in that it has comparable lipid composition and contains apolipoprotein B-100 (apo B-100). In addition, Lp(a) contains the glycoprotein apolipoprotein(a) [apo(a)], which is disulfide-linked to apo B-100. The recent awareness of a striking correlation between atherosclerosis and concentrations of Lp(a) in plasma prompted our development of an accurate quantitative assay for plasma Lp(a), a monoclonal-antibody-based enzyme-linked immunosorbent assay for Lp(a) that is shown to be sensitive, precise, and highly specific. The response to several isoforms of Lp(a) is linear, and as many as 80 samples can be quantified on one plate. This easily performed assay is suitable for use in the clinical laboratory and for screening large populations.


Vaccines ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 734
Author(s):  
Nadirah Abu Nor ◽  
Mohd Zamri-Saad ◽  
Ina-Salwany Md Yasin ◽  
Annas Salleh ◽  
Farina Mustaffa-Kamal ◽  
...  

Vibrio harveyi causes vibriosis in various commercial marine fish species. The infection leads to significant economic losses for aquaculture farms, and vaccination is an alternative approach for the prevention and control of fish diseases for aquaculture sustainability. This study describes the use of formalin-killed Vibrio harveyi (FKVh) strain Vh1 as a vaccine candidate to stimulate innate and adaptive immunities against vibriosis in a marine red hybrid tilapia model. Tilapia are fast growing; cheap; resistant to diseases; and tolerant to adverse environmental conditions of fresh water, brackish water, and marine water and because of these advantages, marine red hybrid tilapia is a suitable candidate as a model to study fish diseases and vaccinations against vibriosis. A total of 180 healthy red hybrid tilapias were gradually adapted to the marine environment before being divided into two groups, with 90 fish in each group and were kept in triplicate with 30 fish per tank. Group 1 was vaccinated intraperitoneally with 100 µL of FKVh on week 0, and a booster dose was similarly administered on week 2. Group 2 was similarly injected with PBS. Skin mucus, serum, and gut lavage were collected weekly for enzyme-linked immunosorbent assay (ELISA) and a lysozyme activity assay from a total of 30 fish of each group. On week 4, the remaining 60 fish of Groups 1 and 2 were challenged with 108 cfu/fish of live Vibrio harveyi. The clinical signs were monitored while the survival rate was recorded for 48 h post-challenge. Vaccination with FKVh resulted in a significantly (p < 0.05) higher rate of survival (87%) compared to the control (20%). The IgM antibody titer and lysozyme activities of Group 1 were significantly (p < 0.05) higher than the unvaccinated Groups 2 in most weeks throughout the experiment. Therefore, the intraperitoneal exposure of marine red hybrid tilapia to killed V. harveyi enhanced the resistance and antibody response of the fish against vibriosis.


2012 ◽  
Vol 19 (8) ◽  
pp. 1296-1303 ◽  
Author(s):  
Robert W. Frenck ◽  
Alejandra Gurtman ◽  
John Rubino ◽  
William Smith ◽  
Martin van Cleeff ◽  
...  

ABSTRACTA randomized, double-blind, phase 3 trial evaluated the immunogenicity, safety, and tolerability of a 13-valent pneumococcal conjugate vaccine (PCV13) coadministered with trivalent inactivated influenza vaccine (TIV) in pneumococcal vaccine-naive adults. Participants ages 50 to 59 years (n= 1,116) received TIV with PCV13 (group 1) or placebo (group 2) (1:1 randomization); 1 month later, group 1 received placebo and group 2 received PCV13. A hemagglutination inhibition (HAI) assay for TIV and a standardized enzyme-linked immunosorbent assay for pneumococcal serotype-specific immunoglobulin G (IgG) were performed and opsonophagocytic activity (OPA) titers (assessedpost hoc) were measured at baseline and 1 and 2 months postvaccination. The rises in HAI assay geometric mean titer (GMT) and percentage of participants in groups 1 and 2 with ≥4-fold increases in HAI responses (A/H1N1, 84.0% and 81.2%, respectively; A/H3N2, 71.1% and 69.5%, respectively; and B, 60.6% and 60.3%, respectively) were similar. In group 1, all serotypes met the predefined IgG geometric mean concentration (GMC) ratio noninferiority criterion relative to group 2, but GMCs were lower in group 1 than group 2. When comparing group 1 with group 2, 5 serotypes did not meet the OPA GMT ratio noninferiority criterion, and OPA GMTs were significantly lower for 10 serotypes. PCV13 injection site reactions were similar and mostly mild in both groups. Systemic events were more frequent in group 1 (86.2%) than group 2 (76.7%;P< 0.001); no vaccine-related serious adverse events occurred. Coadministration of PCV13 and TIV was well tolerated but associated with lower PCV13 antibody responses and is of unknown clinical significance. Given the positive immunologic attributes of PCV13, concomitant administration with TIV should be dictated by clinical circumstances.


2016 ◽  
Vol 50 (2) ◽  
pp. 55-61 ◽  
Author(s):  
Hakki Yilmaz ◽  
M. Cakmak ◽  
B. Ceydilek ◽  
C. Demir ◽  
A. Aktas

AbstractObjective. Interleukin-35 (IL-35), an interleukin-12 (IL-12) cytokine family member, is shown to be a potent immunosuppressive and anti-inflammatory cytokine. Inducible regulatory T cells (Tregs) produce IL-35 that mediates the immune inhibitory function of Tregs. Growing evidence revealed that upregulation of IL-35 expression may play a critical role in the prevention of autoimmune diseases in various experimental autoimmunity models and vice versa. Hashimoto’s thyroiditis (HT) is considered to be a Treg cell-related autoimmune disease with loss of self-tolerance. Methods. One hundred-twenty eight subjects, newly diagnosed hypothyroid HT patients [56 overt (Group 1), 72 subclinical hypothyroid (Group 2)] and 38 healthy controls (Group 3) were enrolled in the study. The levels of serum IL-35 were determined by enzyme-linked immunosorbent assay (ELISA). Results. Serum IL-35 levels were lower in the HT group when compared with subclinical HT group [304.5 (834.6) pg/ml vs. 636.1 (1542.0) pg/ml, p=0.004] and control cases [304.5 (834.6) pg/ml vs. 1064.7 (2526.8) pg/ml, p<0.001]. Serum IL-35 levels were inversely associated with thyroid stimulating hormone (TSH; rs=-0.396, p<0.001) and anti-thyroid peroxidase antibodies (TPOAb; rs=-0.571, p<0.001) in whole group. Serum IL-35 were negatively associated with TSH (rs=-0.264, p=0.003) and TPOAb (rs=-0.735, p<0.001) in patients with Hashimoto’s thyroiditis (Group 1 + Group 2). Conclusion. The results suggest that IL-35 may play a role in the pathogenesis of HT.


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