scholarly journals Evaluation of oxidative stress level: total antioxidant capacity, total oxidant status and glutathione activity in patients with Covid-19

2021 ◽  
pp. 100897
Author(s):  
Behrouz Karkhanei ◽  
Elaheh Talebi Ghane ◽  
Fereshteh Mehri
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Capacity ◽  
Stress Level ◽  
Total Antioxidant Capacity ◽  
Total Oxidant Status ◽  
Oxidative Stress Level ◽  
Total Antioxidant ◽  
Oxidant Status

scholarly journals Evaluation of oxidative stress in sheep infected with Psoroptes ovis using total antioxidant capacity, total oxidant status, and malondialdehyde level

2017 ◽  
Vol 61 (2) ◽  
pp. 197-201 ◽  
Author(s):  
Mustafa Sinan Aktas ◽  
Fatih Mehmet Kandemir ◽  
Akin Kirbas ◽  
Basak Hanedan ◽  
Mehmet Akif Aydin
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Stress Index ◽  
Total Oxidant Status ◽  
Psoroptes Ovis ◽  
Oxidative Stress Index ◽  
Total Antioxidant ◽  
Oxidant Status ◽  
And Oxidative Stress

AbstractIntroduction:The study aimed at evaluating oxidative stress using malondialdehyde (MDA), total antioxidant capacity (TAC), total oxidant status (TOS), and oxidative stress index (OSI) markers in sheep naturally infected withPsoroptes ovis(Acari).Material and Methods:The study was performed on 40 sheep divided into two equal groups: a healthy group (group I) and a group naturally infected withPsoroptes ovis(group II). The sera were obtained by centrifuging blood samples collected from the vena jugularis and serum MDA level changes in the samples were measured spectrophotometrically. Commercially available test kits were used for the measurement of TAC and TOS levels. The percentage ratio of TOS level to TAC level was accepted as OSI.Results:The serum malondialdehyde, total oxidant status levels, and oxidative stress index increased significantly (P < 0.01) in group II, while the serum total antioxidant capacity levels decreased significantly (P < 0.01) in this group. Negative correlations between total antioxidant capacity and total oxidant status and total antioxidant capacity and malondialdehyde, and a positive correlation between total oxidant status and malondialdehyde were found in infected sheep.Conclusion:The obtained results indicated the relationship between oxidant/antioxidant imbalance andPsoroptes ovisinfection in sheep. Their MDA, TAC, TOS, and OSI markers may be used to determine the oxidative stress in natural infections withPsoroptes ovis.

Evaluation of Total Antioxidant Capacity and Total Oxidant Status of Preterm and Term Breast Milk during the Course of Lactation and within a Nursing Session

2019 ◽  
Author(s):  
Asli Deniz ◽  
Ozge Aydemir ◽  
Adviye Cakil Saglik ◽  
Zekiye Sekili ◽  
Zeynep Kusku Kiraz ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Breast Milk ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Stress Index ◽  
Total Oxidant Status ◽  
Term Infants ◽  
Stage Of Lactation ◽  
Total Antioxidant ◽  
Oxidant Status

Abstract Objective Breast milk (BM) contains antioxidant molecules which may offer protection against oxidative stress (OS). We aim to investigate oxidant–antioxidant balance in preterm BM during the course of lactation and within a nursing session. Study Design Total antioxidant capacity (TAC) and total oxidant status (TOS) were measured in colostrum, transitional, and mature BM samples of preterm infants born earlier than 34th week of pregnancy and healthy term infants. Oxidative stress index (OSI) was calculated. Foremilk and hindmilk samples were collected separately. Results In colostrum and transitional milk, TAC (p < 0.001 and p = 0.001, respectively) and TOS (p = 0.005 and p < 0.001, respectively) were lower in preterm BM compared with term BM. OSI was also lower in preterm BM, but it was statistically significant only in transitional milk (p < 0.001). TAC was highest in colostrum and decreased through the course of lactation. However, the decrease in TAC was not statistically significant in preterm BM. Lowest values of TOS and OSI were observed in colostrum. In transitional term BM, hindmilk had a better oxidant–antioxidant profile as indicated by lower TOS and OSI. Conclusion Oxidant–antioxidant balance is preserved in BM in every stage of lactation. Preterm BM has lower OSI which may offer benefits to preterm newborn against OS.

Total oxidant status and total antioxidant capacity in the saliva of patients with chronic periodontitis

MedPharmRes ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 21-26
Author(s):  
Thuy T. Nguyen ◽  
Duc A. Vo ◽  
Truc Thanh Thai ◽  
Thuy L. Vo ◽  
Nam C-N. Huynh
Keyword(s):  
Antioxidant Capacity ◽  
Chronic Periodontitis ◽  
Total Antioxidant Capacity ◽  
Control Group ◽  
Total Oxidant Status ◽  
Oxidative Stress Biomarkers ◽  
Clinical Attachment Loss ◽  
Attachment Loss ◽  
Total Antioxidant ◽  
Oxidant Status

Background: Recently, methods of quantifying total oxidant status (TOS) and total antioxidant capacity (TAOC) were developed to investigate periodontitis. This study was performed to evaluate the salivary TOS and TAOC levels of patients with chronic periodontitis (CP) and investigating the association between periodontal clinical parameters and these oxidative stress biomarkers. Material and methods: 40 participants (23-65 years old) were classified into two groups of 20 each, namely the CP group (participants with CP) and the control group (periodontally healthy controls). Clinical periodontal parameters were monitored, and TOS and TAOC levels were measured using laboratory assays. Results: TOS level increased in the saliva of patients with CP and the salivary TAOC in patients with CP was significantly lower than that of the control group. The TOS had a positive moderate correlation with the plaque index and clinical attachment loss (r=0.32 and 0.37, respectively) while TAOC was negatively and moderately correlated with clinical attachment loss (r=-0.35). Conclusion: Salivary TOS and TAOC were distinguished in healthy and chronic PD patients. Further studies are required to comprehensively evaluate the potential role of these biomarkers in diagnosis and treatment evaluation of CP.

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