Salivary Oxidative Stress Research Articles

Efficacy of Combined vs. Monotherapy in Oral Lichen Planus: A Randomized Clinical Trial.

The aim of this study was to compare the topical therapeutic efficacy of triamcinolone acetonide (TA) (0.2%) plus hyaluronic acid (HA) (0.1%) versus monotherapy in patients with symptomatic oral lichen planus (OLP), as well as to investigate the oxidative stress of saliva under the different treatments. Sixty OLP patients were included in a randomized, double-blind, singlecenter study with a treatment duration of 28 days and 3-month follow-up period. Participants were randomized into three groups: Group I (TA + HA), Group II (TA), and Group III (HA). Treatment efficacy was assessed by means of Thongprasom scale, Oral Health Impact Profile-14 (OHIP-14), and visual analog scale (VAS). In addition, biochemical analyses were performed in order to determine the level of antioxidant biomarkers in saliva, including superoxide dismutase (SOD), glutathione (GSH), and total antioxidant capacity (TAC). All treatments seem to exhibit a significant effect in accordance with Thongprasom scale (p < 0.001), VAS reduction (p < 0.001), and OHIP14 (p < 0.05), which maintains over time. No significant changes in salivary oxidative stress in any of the three groups occurred. The results exhibited a significant improvement in the treated patients in all three groups. There were no significant changes in salivary stress biomarkers under treatment condition.

Evaluating the Levels of Mental Stress, Salivary Oxidative Stress, Body Mass Index, and Waist-to-Hip Ratio in University Students With and Without Polycystic Ovary Syndrome and Their Impact on Academic Performance.

In recent decades, there has been a significant increase in the number of diseases, with endocrine diseases, such as polycystic ovarian syndrome (PCOS), showing a notable rise. Women with PCOS have a higher risk of depression and stress which can affect the academic performance of the students. Hence, this study aims to compare salivary oxidative stress biomarkers, mental stress levels, body mass index (BMI), and waist-hip ratio (WHR) in students with and without PCOS, and examine the impact of these factors on academic performance. Female students (n=71) with self-reported PCOS (n=36) were compared to those without PCOS (n=35). Perceived and academic stress were assessed using validated scales, while BMI and WHR were measured through physical examination. Academic performance was self-reported and validated by follow-up interviews. Salivary MDA, a biomarker for oxidative stress, was measured using an enzyme-linked immunoassay (ELISA) test. The analysis revealed that female students with PCOS exhibited higher MDA (ng/ml) levels (0.71±0.13 vs. 0.41±0.14), perceived stress (28.42±4.75 vs. 22.0±6.62), BMI (26.74±6.28 vs. 23.87±4.81), and academic stress (91.03±31.52 vs. 66.86±30.98) compared to those without PCOS.In participants with PCOS, BMI showed a weak positive correlation with academic stress (r=0.312), while the Perceived Stress Score (PSS) and MDA levels showed a strong positive correlation with academic stress (r=0.709 and 0.850, respectively). Academic performance was weakly positively correlated with perceived stress score (r=0.384). When individual factors (BMI, perceived stress, MDA levels) were compared, positive significance was observed in both PCOS and non-PCOS groups. Findings suggested that female students diagnosed with PCOS experience elevated levels of perceived stress, salivary MDA, and BMI, potentially impacting their academic performance.

Salivary Oxidative-Antioxidant Profile Following Adjunctive Gaseous Ozone Administration in Non-Surgical Periodontal Treatment: A Randomized Controlled Trial.

Background: Periodontitis is associated with increased oxidative stress, which may impair treatment outcomes. Ozone therapy has shown promise in reducing oxidative stress and improving periodontal health. This study examined the impact of adjunctive gaseous ozone administration on salivary oxidative stress markers in patients with periodontitis stages II-IV and grades A-C undergoing non-surgical periodontal treatment (NSPT). Methods: Ninety patients with periodontitis were randomly allocated to either the test group (NSPT with gaseous ozone administration) or the control group (NSPT alone) using computer-generated randomization. The OzoneDTA system was used to deliver ozone at 2100 ppm for 60 s per site once weekly for 4 weeks. Clinical periodontal parameters (probing depth [PD], clinical attachment level [CAL], plaque index [PI], gingival index [GI]) and salivary oxidative stress markers (malondialdehyde [MDA], total antioxidant capacity [TAC], superoxide dismutase [SOD]) were assessed by blinded examiners at baseline, 3, and 6 months post-treatment. Results: Mixed ANOVA revealed significant three-way interactions between time, treatment, and stage or grade for clinical and biochemical measures (p < 0.001). The test group exhibited significant improvements in TAC (mean difference: 0.45 ± 0.12 mmol/L, p = 0.002), MDA (-0.38 ± 0.09 nmol/mL, p = 0.001), and SOD (65 ± 18 U/mL, p < 0.001) compared with the control group, with more pronounced effects in stages III and IV. Large effect sizes (Cohen's d > 0.8) were observed for the test group between baseline and 6 months for all markers. Conclusions: Gaseous ozone administration as an adjunct to NSPT can effectively improve clinical periodontal parameters and salivary oxidative stress markers, particularly in stages III and IV periodontitis. The enhanced outcomes may be attributed to ozone's antimicrobial and immunomodulatory properties, which synergistically reduce oxidative stress and promote periodontal healing.

Salivary oxidative stress biomarkers in periodontitis-free smokers: a cross sectional study.

Salivary oxidative stress has been extensively studied with attempts to correlate changes in the oxidative stress markers with local and systemic factors, including smoking. The objective of this study was to evaluate the influence of two forms of smoking, cigarettes and waterpipe smoking (WPS), on selected oxidative stress biomarkers in saliva. Three groups of participants were enrolled into the study, controls (never smokers), cigarette smokers and WPS. Participants were clinically free from periodontitis and systemic conditions known to affect the saliva constituents. Unstimulated whole saliva samples were collected according to a standard protocol and concentrations of 8-hydroxy-2'-deoxyguanosine (8-OHdG), myeloperoxidase (MPO), malondialdehyde (MDA), total antioxidant capacity (TAC), and cortisol. The one-way ANOVA test was used to compare the levels of each oxidative stress biomarker between the three study groups and the hierarchical linear regression analysis was used to test the levels of salivary cortisol for prediction of other oxidative stress biomarkers. Significance levels were set at 95% confidence intervals and probability values ≤0.05. 8-OHdG was highest in WPS group (mean±SE 11,030.35±1829.16 pg/mL) while MDA and cortisol levels were highest in the cigarette smokers group (mean±SE 3.33±0.52 µM and 3.99±0.48 ng/mL, respectively) and MPO was highest in the control group (mean±SE 7.760±1.55 ng/mL). WPS group showed the highest TAC (mean±SE 0.3±0.03 mM). However, none of the tested makers reached a statistically significant difference. Despite subtle changes in some biomarkers, the salivary oxidative stress does not appear to be significantly influenced by smoking habits in periodontitis-free smokers.

Comparing the Effectiveness of Octenidine Hydrochloride and Chlorhexidine Gluconate Mouthrinses in Reducing Plaque and Oxidative Stress in Institutionalized Children with Down Syndrome.

Due to decreased manual dexterity, a lack of motivation, and difficulty on the part of the caregiver conducting efficient oral hygiene measures at home, patients with Down syndrome (DS) are badly affected. The objective of this study is to compare the efficacy of 0.1% octenidine (OCT) hydrochloride and 0.12% chlorhexidine (CHX) gluconate on plaque control and oxidative stress in institutionalized children with DS. In 20 children, salivary samples were collected for analysis of the inflammatory marker high-sensitive C-reactive protein (hsCRP) and oxidative stress markers, specifically malondialdehyde (MDA). Plaque index (PlI) and gingival index (GI) were scored. After oral prophylaxis, the participants were randomly assigned to two groups, each consisting of 10 individuals (octenidol and CHX). Salivary oxidative stress marker assays were carried out using a modified version of Yagi's (1984) method, and absorbance was measured at 540 nm using an ultraviolet-visible spectrophotometer at 535 nm. hsCRP assays were conducted via latex turbidimetric immunoassay. On comparison between the two groups, the OCT group showed a statistically significant reduction in GI, PlI, and MDA values (p < 0.05). It was seen that the use of 0.1% OCT hydrochloride could facilitate the maintenance of good oral hygiene and periodontal status, especially in patients with motor difficulties. PMS/IEC/2016/02. Raj AS, George S, S A, et al. Comparing the Effectiveness of Octenidine Hydrochloride and Chlorhexidine Gluconate Mouthrinses in Reducing Plaque and Oxidative Stress in Institutionalized Children with Down Syndrome. Int J Clin Pediatr Dent 2024;17(4):437-441.

The Role of Salivary Biomarkers in Monitoring Oral Health in Patients with Implants and Periodontitis

Oxidative stress, a physiological process that can damage cells, is known to affect various aspects of oral health. Oxidative stress can influence dental implant longevity and health. Assessing biomarkers of oxidative stress in saliva is beneficial for diagnosing and tracking the progression of oral diseases. A study is made of salivary oxidative stress in patients with dental implants with or without periodontitis. The study consisted of the following groups: Group1 (healthy without dental implants); Group 2 (subjects undergoing periodontal maintenance without dental implants); Group 3 (healthy patients with implants older than six months); and Group 4 (patients undergoing periodontal maintenance with implants older than six months). A complete examination of the oral cavity was made in each patient and a questionnaire was used to assess habits of hygiene, quality of life, and information about the implants. The following parameters were recorded in unstimulated whole saliva: ferric reducing antioxidant power (FRAP), Trolox equivalent antioxidant capacity (TEAC), cupric reducing antioxidant capacity (CUPRAC), advanced oxidation protein products (AOPP), and total proteins (TP). A total of 160 patients were studied, with 40 patients per group. The mean oxidative stress biomarker values obtained in the patients without implants and with implants were FRAP 0.590 ± 0.514 and 0.588 ± 0.334 mmol/L (p = 0.974); TEAC 0.320 ± 0.223 and 0.315 ± 0.172 mmol/L (p = 0.879); CUPRAC 0.286 ± 0.216 and 0.288 ± 0.151 mmol/L (p = 0.956); AOPP 456.04 ± 789.75 and 430.65 ± 752.05 µmol/L (p = 0.838); and TP 73.90 ± 50.83 and 70.36 ± 56.93 mg/dL (p = 0.684), respectively. No substantial variations were noted in the salivary oxidative stress biomarker levels between patients with controlled periodontal disease and/or dental implants compared to healthy individuals.

Salivary Oxidative Stress Assessment in Tobacco Users with and without Potentially Malignant Disorders and Micronuclei Estimation using Fluorescent Microscopy

Abstract Background: Consumption of tobacco in either smoking or nonsmoking form produces free radicals, contributing to an increased risk of oral cancer as a result of oxidative stress. Biochemical changes in antioxidant enzymes are responsible for tobacco-associated oral carcinogenesis. Due to the production of reactive oxygen species and oxidative stress, the promotion of carcinogenesis occurs in the cells. Oral potentially malignant disorders (OPMDs) is an assembly of benign lesions with morphologically altered clinical or histopathological tissue that has a greater than normal risk of transforming into malignant lesions after diagnosis at a later date. Micronuclei are the goal site for early genotoxic events and are involved in carcinogenic events. Micronuclei in exfoliated cells are useful biomarkers in assessing cytogenetic damage. Early detection will help to devise appropriate treatment plans, thereby improving patient survival rates. Aim and Objectives: To estimate the salivary superoxide dismutase (SOD) levels and the expression of micronuclei in exfoliated buccal cells of tobacco users before the onset of tobacco-induced oral lesions and correlating the same with patients with OPMDs to determine if this can be useful in predicting early malignant potential in subjects with habitual tobacco usage. Materials and Methods: The study included three groups. Group I – Tobacco users with OPMD (n = 50), Group II – Tobacco users without OPMD (n = 50), and Group III – Healthy controls (n = 50). Sandwich enzyme-linked immunosorbent assay was done for saliva samples for quantification of salivary SOD. Exfoliated buccal cells were smeared and stained with acridine orange stain and viewed under a fluorescent microscope for micronuclei estimation. Results: The study showed a significant difference in salivary SOD levels and increased micronuclei expression among tobacco users than healthy controls. Conclusion: Our study results revealed a gradual and steady decrease of SOD levels and increased micronuclei expression from healthy control to tobacco users without lesions and tobacco users with lesion, and this can be used as an effective noninvasive early diagnostic biomarker in assessing malignant progression in tobacco users. Furthermore, the evaluation of micronuclei estimation can serve as a simple, quick, and noninvasive chair-side procedure for regular oral cancer screening in patients with tobacco usage.

Evaluation of Salivary Oxidative Stress Marker (Lipid Peroxidation), and Non-Enzymatic Antioxidants (Vitamin C and Vitamin E) in Patients with Acute Myocardial Infarction

Acute Myocardial Infarction (AMI), is the major cause of mortality and morbidity. There is substantial evidence that oxidative stress plays the major role in the atherosclerotic process. This study was aimed to evaluate the levels of salivary malondialdehyde (MDA), total antioxidant capacity (TAC) and non-enzymatic antioxidants (Vitamin C and Vitamin E) in AMI patients. Materials and methods: Sixty AMI patients (35 Males and 25 Females) with mean age of 54 ± 6.7 years and sixty control subjects with mean age 55 ± 6.2 years were incorporated in this study. Un stimulated saliva were collected from each subject in both groups. Malondialdehyde, and Total Antioxidant Capacity, Vitamin C and Vitamin E levels in saliva were estimated spectrophotometrically. SPSS computer software was used for data analysis. Results: Salivary MDA and TAC was significantly elevated in AMI patients compared with controls, while Vitamin C and Vitamin E were significantly decreased in AMI patients. Conclusions: Oxidative stress was increased in saliva of AMI patients, raised saliva MDA and TAC serve as marker of detecting chronic inflammation or be elevated as a consequence of oxidative stress in AMI patients. It may be taken in consideration that the saliva is so important tool in evaluation of lipid peroxidation and antioxidant agents to confirm the diagnosis of certain diseases.

Evaluation of the Salivary Oxidative Stress, and Non-Enzymatic Antioxidants Marker in Patients with Rheumatoid Arthritis

Rheumatoid arthritis (RA) is a chronic systemic inflammatory autoimmune disease that preferentially affects diarthrodial joints. Oxidative stress is elevated in RA patients implying reactive oxygen species (ROS) are possible mediators of tissue damage. Assess the level of total antioxidant capacity (TAC), malondialdehyde (MDA), and non-enzymatic antioxidants (vitamin E, and C )in the saliva of in patients with rheumatoid arthritis(RA). For the realization of our goals we included sixty rheumatoid arthritis patients (RA) (21 female and 39 male) who were fulfilling the American College of Rheumatology and European League Against Rheumatism 2010 revised criteria for classification of RA ,picked randomly, at the age from 25-57 years, and 60 as age matched control group, who attended to Tikrit Teaching Hospital / Tikrit / Iraq during the period from January 2017 to March 2018. Stimulated saliva specimens were collected at the morning. TAC of saliva was evaluated by spectrophotometric assay. Statistical comparisons were performed using Student’s t-test, by SPSS 13. Levels of salivary pH, flow rate, TAC, vit E and C were decreased significantly, whereas the salivary level of MDA were increased significantly in RA patients when compared with healthy controls. There was an increased oxidative stress and a low antioxidant status in patients with RA. These changes are probably due to efforts for reducing lipid peroxidation and hence to lower tissue damage.

The Impact of Competitive Sports on Oral Health: Exploring Their Relationship with Salivary Oxidative Stress in Children.

This article explores the correlation between salivary biomarkers, such as glutathione peroxidase (GPX), total antioxidant capacity (TAC), and superoxide dismutase (SOD), and their association with oral health for children in competitive sports. Saliva has emerged as a valuable resource for evaluating physiological and pathological conditions due to its non-invasive collection method and easy storage. This study examines the potential of GPX, TAC, and SOD as salivary biomarkers for assessing the impact of competitive sports on children's oral health. It discusses the potential implications of increased oxidative stress due to intense physical activity and the role of antioxidant defense mechanisms in maintaining oral health. In total, 173 children aged between 6 and 17 were divided into three groups, 58 hockey players, 55 football players, and 60 in the control group, and examined to assess their oral hygiene and dental and periodontal health. Saliva was collected, centrifuged, and the supernatant was analyzed for the relevant biomarkers. The findings seem to suggest that salivary biomarkers, like GPX, TAC, and SOD, might serve as indicators of the physiological response to competitive sports in children, as well as indicators of oral health, especially dental cavities, and periodontal disease. Statistical analysis showed significant differences between the groups, with better values for athletes, regardless of age, sex, or activity type. Understanding the relationship between salivary biomarkers and competitive sports in children can have significant implications for monitoring and optimizing the health and performance of young athletes. Further research is needed to establish the specific associations between these biomarkers and the effects of several types and intensities of sports activities on oral health in children.

Salivary Oxidative Stress and Antioxidant Capacity in Smokeless Tobacco (Naswar) Users.

Naswar, a smokeless tobacco product, commonly consumed in Pakistan, is associated with a 10-fold increase in the risk of oral cancer. However, little is known about Naswar's underlying toxicity mechanisms. The current study aimed to investigate the effects of Naswar use on oral health and salivary parameters. A case-control study was conducted among Naswar users (n=42) and age-matched healthy controls (n=42) in Pakistan in 2019. Participant data were collected using questionnaires. Decayed, missing, and filled teeth (DMFT) scores were computed during clinical examinations. Unstimulated whole saliva was collected to assess salivary flow rate, pH, and salivary total oxidative stress (TOS)/total antioxidant capacity (TAC) using commercially available kits. Participants' oral health parameters were compared between cases and controls using ANOVA. No significant differences were observed between the two groups in terms of age, oral health, and hygiene practices and mean DMFT score. Mean salivary pH and the salivary flow rate was significantly (p<0.001) higher in Naswar users (7.7 and 0.71 mL/minute, respectively) than in non-users (6.95 and 0.52 mL/minute, respectively). Although TOS and TAC were not significantly different between the groups, Naswar users generally had a higher TOS (51.6±42 µmol/L) and lower TAC (0.55±0.18 mmol/L) than non-users (TOS 45.5±38.2 µmol/L and TAC 0.57±0.17 mmol/L). Correlational analysis also revealed a significant positive correlation between DMFT score andNaswar use duration (r=0.796, p<0.001)and the number of dips/units consumed each day (r=0.515; p<0.001). Habitual Naswar use is associated with increased salivary flow rate, pH, and TOS, and reduced TAC levels in Pakistani adults compared to non-users. The pro-oxidant changes may contribute toward deleterious effects of Naswar use including oral cancer.

Oral Candidal Carriage and its Correlation with Salivary Oxidative Stress in Smokeless Tobacco Users

Background: Smokeless tobacco use, particularly the consumption of Naswar, is prevalent in Pakistan and has been associated with various chronic diseases, including oral cancer. Naswar is known to contain toxic heavy metals, carcinogenic substances, and microbial contaminants. This study aims to assess the oral Candida carriage and biofilm formation in Candida albicans isolates from Naswar users and its association with salivary oxidative stress. Methods: A cross-sectional study was conducted involving 150 participants, divided into Naswar users (n=75) and Non-users (n=75). Socio-demographic data, oral health, hygiene practices, and Naswar usage patterns were collected through a standardized questionnaire. Salivary samples were collected, and Candida strains were identified using culture techniques. Salivary oxidative stress was assessed using a DPPH solution-based free radical system. Results: The mean age of participants was 30 ± 7.3 years for Naswar users and 30.2 ± 7.1 years for non-users. No significant differences were observed in oral health and hygiene practices between the two groups. Among Naswar users, the most common type of product used was green moist Naswar (77.3%). Oral Candida carriage was significantly higher in Naswar users, particularly those with fungal infections of C. albicans, C. krusei, or both. These participants also exhibited elevated levels of salivary oxidative stress. Practical Implication: Public health interventions and oral health education programs should be implemented to raise awareness about the risks associated with Naswar and promote good oral hygiene practices among users. Conclusion: This study reveals significant differences in oral Candida carriage and salivary oxidative stress between Naswar users and non-users, indicating potential implications for the oral health of Naswar users. These findings underscore the need for larger prospective studies to validate the detrimental effects of Naswar use. Public health interventions targeting smokeless tobacco users should prioritize oral health promotion and emphasize the risks associated with Naswar consumption. Keywords: Candida species, smokeless tobacco, oral health, oxidative stress

Xerostomia and prevention of dryness with a Pycnogenol® mouth spray: a pilot study.

The aim of this pilot, supplement study was the evaluation of primary, idiopathic mucosal mouth dryness (xerostomia or dry mouth) in subjects without systemic diseases. Subjects with xerostomia were managed either with standard management (SM) or with SM and a Pycnogenol® mouth spray (Hankintatukku Oy, Karkkila, Finland), at the dosage of 60 mg/day in 30 spurts, for 2 weeks. A total of 50 subjects were included in the study: 25 controls using only standard management (SM) and 25 subjects using the Pycnogenol® mouth spray. No side effects and no tolerability problems were observed with the Pycnogenol® mouth spray. The groups were comparable for characteristics and symptoms at baseline. These otherwise healthy subjects had a BMI<26. After 2 weeks, salivary flow and salivary oxidative stress (in Carr Units) were improved significantly with Pycnogenol® mouth spray as compared to controls (P<0.05), whereas minimal improvements in salivary flow were seen with SM. The subjective symptomatic dry mouth score and the number of mucosal breaks and ulcerations (all minimal, <1 mm in length or diameter) were significantly decreased with the Pycnogenol® mouth spray supplement compared to SM controls (P<0.05). The Pycnogenol® mouth spray led to significant improvement in salivary lysozyme levels, compared to controls (P<0.05). Based on these preliminary results, Pycnogenol® mouth spray could be a new supplementary option for the management of primary xerostomia.

Dental Caries and Salivary Oxidative Stress: Global Scientific Research Landscape.

This study aimed to analyze the research trends on salivary oxidative stress associated with dental caries and to perform bibliometric approaches for existing publications on this association. A search was performed using the Web of Science Core Collection, without any restriction of language or publication year. The number of periodicals with the most published articles in this theme, most published authors and keywords were mapped; other metrics were also evaluated such as the countries that have more research on the subject and the period in which there were more publications on the subject. During the knowledge mapping, the most frequent experimental designs were analyzed, type of saliva collection, stage of caries disease, evaluated oxidative parameters were retrieved and analyzed from each manuscript. Between the 43 selected articles, the Journal of Clinical Pediatric Dentistry was the periodical appearing the most with 4 published articles. The authors who published the most were Celec, P., Tothova, L., Hegde, A.M., Shetty, S., Antoniali, C., and Pessan, JP with three articles each, and a total of 180 keywords representing the evolution of the theme. India and Asia were found to be the country and continent with most publications, respectively. Most articles collected non-stimulated total saliva, with total antioxidant capacity being the parameter most often evaluated. The type of study that appeared the most was cross-sectional studies, and articles published in the period of 2017-2022 were the most frequent. Studies show that dental caries can be associated to the changes in salivary oxidative biochemistry with an increase in lipid peroxidation, a biomarker of oxidative damage, and an increase in antioxidant capacity in chronic caries, in response to cariogenic challenge. Some studies evidence the reduction of lipid peroxidation after treatment of the carious lesion. Our findings reveal worldwide research trends, as well as a clearer knowledge of the evolution and future scenarios of this issue, also showing the mechanisms associating dental caries with changes in salivary oxidative biochemical parameters are not clear.

The Emerging Role of Salivary Oxidative Stress Biomarkers as Prognostic Markers of Periodontitis: New Insights for a Personalized Approach in Dentistry

Periodontitis is a multifactorial and infective oral disease that leads to the destruction of periodontal tissues and tooth loss. Although the treatment of periodontitis has improved recently, the effective treatment of periodontitis and the periodontitis-affected periodontal tissues is still a challenge. Therefore, exploring new therapeutic strategies for a personalized approach is urgent. For this reason, the aim of this study is to summarize recent advances and the potential of oxidative stress biomarkers in the early diagnosis and personalized therapeutic approaches in periodontitis. Recently, ROS metabolisms (ROMs) have been studied in the physiopathology of periodontitis. Different studies show that ROS plays a crucial role in periodontitis. In this regard, the reactive oxygen metabolites (ROMs) started to be searched for the measures of the oxidizing capacity of the plasma understood as the total content of oxygen free radicals (ROS). The oxidizing capacity of plasma is a significant indicator of the body's oxidant state as well as homocysteine (Hcy), sulfur amino acid, which has pro-oxidant effects as it favors the production of superoxide anion. More specifically, the thioredoxin (TRX) and peroxiredoxin (PRX) systems control reactive oxygen species (ROS), such as superoxide and hydroxyl species, to transduce redox signals and change the activities of antioxidant enzymes to remove free radicals. Superoxide dismutase (SOD), catalase, and glutathione peroxidase (GPx), among other antioxidant enzymes, change their activity when ROS are produced in order to neutralize free radicals. The TRX system is triggered and transduces redox signals to do this.

Investigation of the Salivary Antioxidants and Oxidative Damage among Smokers and Non-Smokers with Dental Caries

Background: Salivary oxidative stress is thought to be involved in the progression of dental caries. However, evidence from previous studies provides equivocal results with some data supported the link between dental caries and salivary oxidative stress, while others did not find any relationship. Objectives: This study was designed to investigate the levels of salivary oxidative stress among smokers and non-smokers with dental caries. Study Design: Cross-sectional study. Materials and Methods: One hundred adult males, who visited the Conservative and Operative Clinics at the College of Dentistry, Babylon University, Iraq for the period from November 2021 until April 2022, were recruited in this study and were randomly subdivided into three groups; G1: smokers with dental caries, N = 35; G2: non-smokers with dental caries, N = 35; G3: non-smokers without dental caries (control), N = 30. Markers of salivary total antioxidants (TAC) and Malondialdehyde (MDA) were measured in all studied groups. The potential correlations between these markers and other factors such as smoking duration, number of smoked cigarettes per day, and subject’s age were also measured. Result: The levels of TAC were significantly (P = 0.01) greater in patients with dental caries compared to those levels in a control group, while the levels of salivary MDA were not significantly (P ≥ 0.05) differed among all studied groups. Smoking had no significant (P ≥ 0.05) effects on both markers of oxidative stress (TAC and MDA). All measured correlations between makers of oxidative stress and smoking duration, number of smoked cigarettes per day, and subject’s age were insignificant (P ≥ 0.05). Conclusions: Salivary antioxidants may be involved in the progression of dental caries. However, further studies are needed to establish whether markers of oxidative stress (TAC and MDA) are the causes or results of dental caries.

Salivary Oxidative Stress Biomarkers in Thai Adolescents and Young Adults with Type 1 Diabetes Mellitus: A Cross-Sectional Study.

The primary objectives of this study were to compare salivary oxidative stress (OS) biomarker levels in patients with type 1 diabetes mellitus (T1DM) and without T1DM (non-T1DM) and evaluate the relationships between diabetes, periodontal status, and OS biomarker levels. Twenty patients with T1DM and 20 age-matched patients without T1DM were enrolled. All participants were 15-23 years of age and had permanent dentition. Unstimulated whole saliva was collected in a sterile test tube before examination of clinical periodontal parameters, including bleeding on probing (BOP). Salivary levels of OS biomarkers-malondialdehyde, protein carbonyl, total oxidant status (TOS), and total antioxidant capacity-were determined using oxidative and antioxidative assays followed by spectrophotometric measurement at 375-532 nm. The relationships between diabetes, periodontal status, and OS biomarkers were analyzed using multiple linear regression. TOS was significantly lower in the T1DM group compared with the non-T1DM group (5.06 ± 0.39 vs. 6.44 ± 0.51 µmol H2O2 Eq/l, P = 0.035). After adjusting for confounding factors (age, gender, BMI, clinical periodontal parameters, BOP, or diabetes status accordingly), the multiple linear regression showed that T1DM was significantly associated with a reduction of TOS level (P = 0.008). The BOP > 30% group showed a significant correlation with increased TOS levels compared with the BOP ≤ 30% group (P = 0.002). No relationship was found between OS biomarkers and HbA1c levels. Salivary TOS levels were related to both diabetes status and the extent of gingival inflammation. Further studies to elucidate the role of OS in relation of periodontal disease and T1DM are required.

Salivary oxidative stress level among tobacco chewers and smokers- A comparative Study

Salivary oxidative stress level among tobacco chewers and smokers- A comparative Study

Salivary oxidative stress level among tobacco chewers and smokers: A comparative Study.

Tobacco contains various toxic contents which produce oxygen-free radicals that damage oral tissues. Since saliva encounters tobacco, it has antioxidant defense system and also can serve as a biomarker for oral diseases. Thus, the present study aims to evaluate salivary oxidative stress levels among smokers and chewers. Unstimulated saliva from 240 males who visited tobacco cessation clinic for the first time was collected. Standard protocol was followed to collect saliva and assess salivary antioxidant levels from 80 participants with the habit of smoking, smokeless, and both (smoking and smokeless) tobacco users. The collected data were statistically analyzed. The mean salivary superoxide dismutase and malonyldialdehyde levels were significantly high for participants with both habits (P < 0.000). There was a significant high reduction of glutathione peroxidase and catalase in participants with both habits (P < 0.000). Both smoking and smokeless tobacco modify salivary antioxidant activity. The estimation of salivary oxidative stress can serve as a diagnostic and prognostic biomarker for oral tissue damage and dysplasia. Furthermore, they can function as early biomarkers in preventing dysplastic changes in the oral cavity.

Evaluating the Role of Salivary Oxidative Stress Marker Malondialdehyde in Dental Caries—A Comparative Study

Introduction: Free radical-induced damage on the lipids results in the creation of a novel oxidative stress marker—malondialdehyde (MDA). MDA-induced cell damage affects the immune mechanisms of saliva and may lead to the initiation and progression of bacterial diseases like periodontitis and even dental caries. Aim and Objectives: To determine the salivary levels of the oxidative stress marker—malondialdehyde (MDA) in subjects with dental caries before and after treatment to assess the role of MDA in the initiation and evolution of dental caries. Materials and Methods: The study included 40 patients in total. Based on the number of caries teeth present at the time of diagnosis, patients were divided into two groups: Group I: Subjects with dental caries in 1–2 teeth, N = 20; Group II: Subjects with dental caries in 3–4 teeth, N = 20. The patients were further divided into two groups after undergoing treatment: Group III: Group I subjects who undertook treatment for dental caries, N = 20; Group IV: Group II subjects who underwent treatment for dental caries, N = 20. The whole saliva was obtained from all subjects before treatment and one month after treatment. Estimation of MDA levels was done using ELISA. Statistical analysis was conducted using Student's t-test and Pearson's correlation coefficient. A P value ≤ 0.05 was considered significant. Results: Elevated levels of MDA were evident in subjects with greater carious lesions. The levels of MDA decreased significantly in post-treatment subjects. Pearson's correlation analysis also showed a strong positive correlation with the R-value of 0.832 between Group I and Group II. Conclusion: MDA levels increased with an increase in carious lesions and significantly reduced following treatment proving the role of salivary MDA in the evolution of dental caries.