Total Antioxidant Capacity, Catalase Activity and Salivary Oxidative Parameters in Patients with Temporomandibular Disorders.

OBJECTIVES: Temporomandibular disorders (TMD) are characterized by pain or discomfort in the temporomandibular joint, periauricular region, masticatory muscles, and neck on one or both sides. It may also be associated with joint sounds, restricted mandibular movements and mandibular deviation. Oxidative agents may have a deleterious role in the pathogenesis of joint diseases, and oxidative stress can lead to TMD. The aim of this study was to assess the oxidative stress biomarkers in the saliva of TMD patients and healthy controls. MATERIALS AND METHODS: This case-control study was conducted on 30 patients with TMDs (5 males and 25 females) with a mean age of 30.7±13.2 years, and 30 healthy controls (5 males and 25 females) with a mean age of 29.16±11.2 years. Saliva samples were collected according to the standard protocol and the total antioxidant capacity of the saliva (non-enzymatic), catalase activity, and malondialdehyde (MDA) levels were measured using the ferric reducing ability of plasma, Aebi's method, and high-performance liquid chromatography, respectively. Finally, The MDA levels were analyzed by the Mann-Whitney test. Other quantitative parameters were analyzed by independent t-test. RESULTS: TMD patients had significantly higher salivary levels of MDA compared to the control group (P=0.001). But there were no significant differences in catalase (P=0.49) and total antioxidant capacity (P=0.22) of TMD patients and healthy controls. CONCLUSION: It seems that oxidative stress may be involved in the pathogenesis of TMDs.

Salivary Profile in Adult Type 2 Diabetes Mellitus Patients: A Case-control Study.

OBJECTIVE: To evaluate salivary factors in type 2 diabetes melliuts patients. METHODS: The case-control study was conducted from June to November 2016 at Kermanshah University of Medical Sciences, Kermanshah, Iran, and comprised patients with type 2 diabetes mellitus and healthy controls matched in terms of age and gender. Unstimulated saliva samples were collected in the morning after an overnight fast of 8-12 hours. The samples were centrifuged at 1500 rpm for 5 minutes, and every isolated transparent liquid was immediately frozen at a temperature of -45ºC in a tube. The test sample was later aspirated, and readings were taken. The data was analyzed using SPSS 16.. RESULTS: Of the 200 subjects, 100(50%) were diabetic patients and 100(50%) were healthy controls. The two groups were matched with regard to age, gender, diabetes duration, serum glucose, and glycated haemoglobin (p>0.05 each). In terms of laboratory variables, there were significant differences between the groups related to urea, phosphorus, pH, and glucose (p<0.05 each). Urea and glucose levels were higher in the patient group than the controls (p<0.05 each). Also, calcium and total protein levels were higher in male patients compared to female patients (p < 0.0 5 each) . CONCLUSIONS: Salivary pH, urea, calcium, phosphorus, glucose, and total protein levels could be bio chemical parameters for screening, diagnosis and monitoring of diabetes .

The Effect of Scaling and Root Planning on Salivary TNF-α and IL-1α Concentrations in Patients with Chronic Periodontitis.

OBJECTIVE: Periodontitis is one of the main diseases in the oral cavity that causes tooth loss. The host immune response and inflammatory factors have important role in periodontal tissue. The current study was done with the objective to determine the effect of scaling and root planning on the salivary concentrations of tumor necrosis factor-alpha (TNF-α) and interleukin-1-alpha (IL-1α). METHODS: In this quasi-experimental clinical trial, 29 patients with chronic periodontitis and 29 healthy subjects without periodontitis were studied. Clinical examination findings and salivary TNF-α and IL-1α (using ELISA method) were compared before and after scaling, root planning. RESULTS: Before starting treatment, salivary TNF-α and IL-1α concentrations were higher in healthy control group than in periodontitis group (P< 0.05). Non-surgical treatment increased the concentration of these two biomarkers in the saliva. However, increase in IL-1α concentration was not statistically significant (P= 0.056). There was a negative relationship between TNF-α and IL-1α levels with pocket depth and attachment loss (P< 0.05). CONCLUSION: Scaling and root planning improved periodontal disease indices and salivary TNF-α and IL-1α levels.

Evaluation of Salivary Cortisol Changes and Psychological Profiles in Patients with Recurrent Aphthous Stomatitis.

BACKGROUND AND OBJECTIVE: Some studies suggest that psychological condition and stress can play role in the development of recurrent aphthous stomatitis (RAS). The purpose of this study was to evaluate salivary cortisol changes and psychological conditions in patients with RAS. MATERIALS AND METHODS: Twenty-seven patients (13 males and 14 females, mean age of 32.8 (±10.2) years) with minor RAS and 27 age- and sex-matched controls without RAS participated in this study. The concentration of cortisol (nanomole/L) was measured in samples of unstimulated saliva from patients and controls two times; once during the presence of active lesions and once again when the lesions had healed by immunologic assay. The Hospital Anxiety and Depression Scale was employed to determine psychological condition. Visual analog scale for pain severity was recorded for patients with active lesions episode. Data were analyzed by the SPSS software (version 18.0) using paired and unpaired t-tests and Pearson correlation coefficient. RESULTS: Salivary cortisol level was lower in patients during active lesions (12.4 ± 5.1) and healing (10.5 ± 3.9) episodes compared to the controls (13.1 ± 3.6) (P = 0.583, P = 0.015; respectively). There was no significant difference in salivary cortisol between active lesions and healing episodes (P = 0.943). Anxiety and depression represented no significant differences between active lesions and healing episodes (P > 0.05). Anxiety and depression levels in patients were significantly higher than in controls (P < 0.05). Pain severity in active lesions was not significantly correlated to salivary cortisol level, and anxiety or depression scores (P > 0.05). CONCLUSION: The findings showed that occurrence of RAS was associated with anxiety and depression but not with alterations of salivary cortisol level.

The association between GSTT1, M1, and P1 polymorphisms with coronary artery disease in Western Iran.

DNA damage which occurred by the effect of oxidant and mutant agents has an essential role in the development of atherosclerosis. To investigate the possible association between GSTs polymorphism with coronary artery disease (CAD), we investigated the frequency of GSTT1, M1, and P1 genotypes in patients with CAD compared to controls. The genotypes of GSTT1, M1, and P1 were determined in 209 angiographically documented CAD patients and 108 normal coronary artery cases (as controls) by Multiplex Polymerase Chain Reaction and PCR-RFLP. In CAD patients, the frequency of GSTT1-null genotype was significantly (P = 0.025) lower than that in control. The presence of this genotype was associated with 2.2-fold increased risk of CAD. However, the frequency of GSTM1 and GSTP1 genotypes were not significantly different comparing both groups (P = 0.405 and P = 0.521, respectively). Moreover, non smokers patients had a lower frequency of GSTM1-null genotype (29.2%) compared to non smoker controls (43.5%, P = 0.043). Also, the frequency of both GSTT1-null and GSTM1-null genotypes in patients (3.8%) was significantly lower compared to controls with the same genotypes (10.2%, P = 0.014). Our results indicated that a reduction in the frequency of GSTT1-null and GSTM1-null genotypes that observed in our study might be involved in the pathogenesis of CAD in our population.

Association between apolipoprotein E polymorphism and serum lipid and apolipoprotein levels with Alzheimer's disease.

We have recently demonstrated that apolipoprotein E (APOE)-varepsilon4 allele is a risk factor for Alzheimer disease (AD) in Tehran, Iran. The current study specifically aimed to examine whether APOE polymorphism in association with serum lipids-apolipoprotein level is a risk factor for AD in a population from Tehran, Iran. APOE polymorphism and plasma lipids, apoA1, apoB and lipoprotein (a) (Lp(a)) levels were determined in 94 AD patients and 111matched controls. Our study demonstrated a significant association between APOE polymorphism and the level of plasma lipids and apolipoprotein with AD in this population. The AD subjects had significantly lower apoA1 (p<0.001) and HDL-C (p<0.01) and higher apoB (p=0.01) and LDL-C (p=0.02) levels than that of the control group. The AD subjects carrying APOE-varepsilon4 allele had lower plasma apoA1 (t=5.2, p<0.002) and HDL-C level (t=2.7, p=0.01) but had higher plasma apoB (t=-5.4, p<0.002), LDL-C (t=-4.6, p=0.005) and total cholesterol (TC) (t=-2.7, p=0.01) than that of the non APOE-varepsilon4 carriers. These results indicated that AD patients with APOE-varepsilon4 allele has a distinct plasma lipid profile and carrier of this allele with low levels of apoA1 and HDL-C may be more susceptible to AD.

Association between apolipoprotein E polymorphism and Alzheimer disease in Tehran, Iran.

Epsilon 4 allele of apolipoprotein E (APOE-epsilon4) is a major risk factor for Alzheimer's disease (AD). The association of APOE allele frequencies with AD remains unknown in developing countries. We examined the frequency of APOE alleles in 105 patients with AD and 129 cognitively normal subjects of similar age and sex (control group), in Tehran, Iran. The APOE-epsilon4 allele frequency was significantly higher in the AD subjects than in the control group (21% versus 6.2%, p < 0.001). In addition, the OR for APOE-epsilon4 heterozygous and homozygous subjects were 3.2 (p = 0.001) and 12.75 (p = 0.01), respectively. The OR was not uniform across age groups. The AD subjects carrying one or two APOE-epsilon4 allele showed earlier age-at-onset (p < 0.001). These data suggest that the APOE-epsilon4 allele increase the risk for AD in Tehran population in a dose and age-dependent manner. Although the APOE-epsilon2 allele frequency was lower in the AD subjects than in the control group (0.95% versus 2.7%, p = 0.15), APOE-epsilon2 was not associated with the onset of AD in Tehran's population. The OR for epsilon2 allele in AD subjects was 0.34 (p = 0.21). The genotype frequencies for epsilon3, epsilon4, and epsilon2 alleles in control subjects were 91.2, 6.1, and 2.7%, respectively. These values were similar to that reported for Turkish, Greece, Japanese, Spanish, and Moroccan populations, but they were significantly different from the reported values for the other ethnic populations. This observation emphasizes the importance of geographical location and ethnical background of the subjects in the study of APOE genotypes and their association with AD.

Analysis of association between butyrylcholinesterase K variant and apolipoprotein E genotypes in Alzheimer's disease.

Recent studies indicate that there is a synergic association between butyrylcholinesterase-K variant (BChE-K) and apolipoproteinE-epsilon 4 (ApoE-epsilon 4) to promote risk for Alzheimer's disease (AD). Most subsequently replicative studies have been unable to confirm these finding. We attempted to replicate this finding in 105 AD cases and age and sex matched 129 controls from Tehran population, Iran. The BChE genotype of patients were found to be significantly different from controls (chi(2) = 12.2, d.f. = 2, p = 0.002). The frequency of BChE-K allele was also found to differ significantly in cases compared to controls [24% versus 12% (chi(2) = 20.6, d.f. = 2, p < 0.001)] leading to an increased risk of AD in subjects with this allele (OR = 2.5, 95% CI = 1.64-3.8, p = 0.001). This risk was found to increase from (OR = 2.37, 95% CI = 1.3-4.2, p = 0.006) in subjects less than 75 years old to (OR = 3.16, 95% CI = 1.41-7.1, p = 0.001) in subjects 75 years and older. But, the ApoE-epsilon 4 allele association risk was found to decrease from (OR = 9.5, 95% CI = 3.74-24.1, p = 0.001) in subjects <75 years to (OR = 1.36, 95% CI = 0.49-4.1, p = 0.58) in those subjects 75 years and older. Furthermore, we found a very strong synergic association between BChE-K and ApoE-epsilon 4 OR = 19.1 (95% CI = 428-85.45, p < 0.001). In spite of this, synergism decreased from OR = 36.2 (95% CI = 4.4-296, p = 0.001) in subjects <75 year olds to OR = 6.2 (95% CI = 0.9-72.4, p = 0.06) in subjects > or =75 years. We have found that BChE-K and ApoE-epsilon 4 alleles act synergistically to increase the risk of the late-onset AD, particularly in age group <75 years in Tehran, Iran.