Preliminary Data Regarding Decreased Catalase Specific Activity in the Tears as a Result of Environmental Stress

2017 ◽  
Vol 68 (1) ◽  
pp. 90-93 ◽  
Author(s):  
Anisia Iuliana Alexa ◽  
Alina Cantemir ◽  
Alin Ciobica ◽  
Ioannis Gardikiotis ◽  
Iulia Antioch ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Dry Eye ◽  
Specific Activity ◽  
Environmental Stressors ◽  
Control Group ◽  
Oxygen Species ◽  
Stress Markers ◽  
The Relationship ◽  
And Oxidative Stress

Oxidative stress represents the imbalance between the production of reactive oxygen species and the organism�s capacity to produce antioxidants. This phenomenon has captured lately a lot of attention, with an additional increased interest being manifested towards the relationship between psychological stress and oxidative stress. In the present study we decided to observe the changes which occur in stress environmental conditions applied to rats subjected to swimming and treadmill exercises, by focusing on a preliminary determination of (CAT) specific activity, an enzyme known to catalyse the decomposition of hydrogen peroxide into water and oxygen, and a valuable antioxidant protector, with possible implications into the dry eye pathology. Our results could suggest a possible dry eye animal model induced through stress and a possible implication of the oxidative stress markers in the occurrence of this ocular pathology, as suggested by the significant decrease in the CAT activity registered in rat tears collected after the application of environmental stressors (e.g. swimming and running) versus the control group.

Evaluation of Salivary Antioxidants and Oxidative Stress Markers in Type 2 Diabetes Mellitus: A Retrospective Cohort Study

2020 ◽  
Vol 20 (4) ◽  
pp. 584-590 ◽  
Author(s):  
Shima Fathi ◽  
Shiva Borzouei ◽  
Mohammad Taghi Goodarzi ◽  
Jalal Poorolajal ◽  
Fatemeh Ahmadi-Motamayel
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Control Group ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
Type 2 Dm ◽  
Patients With Diabetes ◽  
The Difference ◽  
And Oxidative Stress

Background: Diabetes Mellitus (DM) is a progressive metabolic disorder. Objective: The aim of this study was to investigate the relationship between antioxidant and oxidative stress markers in the saliva of patients with type 2 DM and a healthy control group. Methods: In this study, 20 patients with diabetes and 20 healthy individuals were evaluated. Salivary antioxidants markers consisted of total antioxidant capacity (TAC), uric acid (UA), peroxidase and catalase. Oxidative stress markers included total oxidant status (TOS), malondealdehyde (MDA) and total thiol (SH). Sialochemical analysis was performed with spectrophotometric assay. All the statistical analyses were conducted using STATA software. Results: TAC decreased significantly in patients with diabetes. Although salivary UA and peroxidase were lower in patients with diabetes compared to the control group, the difference was not significant. Salivary catalase in patients with diabetes was significantly lower than that in the control group. MDA and TOS exhibited significantly higher levels in type 2 DM. SH levels were slightly higher in DM. Conclusions: According to the results of the present study, there were some changes in the salivary levels of some antioxidants and oxidative stress markers in patients with type 2 DM and could be measured as an indicator of serum changes..

Differential susceptibility of a few members of the nasuta–albomicans complex of Drosophila to paraquat-induced lethality and oxidative stress

Genome ◽  
2011 ◽  
Vol 54 (10) ◽  
pp. 829-835 ◽  
Author(s):  
Mysore S. Ranjini ◽  
Ravikumar Hosamani ◽  
Muralidhara ◽  
Nallur B. Ramachandra
Keyword(s):  
Oxidative Stress ◽  
Biochemical Analysis ◽  
Reduced Glutathione ◽  
Differential Susceptibility ◽  
Activity Levels ◽  
Oxygen Species ◽  
Stress Markers ◽  
The Status ◽  
Markers Of Oxidative Stress ◽  
And Oxidative Stress

The evolution of karyotypically stabilized short-lived (SL) and long-lived (LL) cytoraces in the laboratory have been established and validated through our previous lifespan studies. In the present investigation, we examined the possible reason(s) for the differential longevity among selected members of SL and LL cytoraces, employing the well known paraquat (PQ) resistance bioassay. Exposure of these races to varying concentrations of PQ revealed relatively higher resistance among LL cytoraces than SL cytoraces, as evident by the lower incidence of mortality. Biochemical analysis for endogenous markers of oxidative stress revealed that LL-2 cytorace exhibited lower reactive oxygen species (ROS) and lipid peroxidation (LPO) levels, higher activity levels of superoxide dismutase (SOD), and coupled with higher levels of reduced glutathione (GSH) compared with the levels found in SL-2 cytorace. These findings suggest that the higher susceptibility of SL cytoraces to PQ challenge may be, at least in part, related to the higher endogenous levels of oxidative stress markers. Although the precise mechanisms responsible for the longer longevity among LL cytoraces of the nasuta–albomicans complex of Drosophila merits further investigation, our data suggest that the relatively longer lifespan may be related to the status of endogenous markers that renders them more resistant towards oxidative-stress-mediated lethality, as evident in the PQ assay.

The Association between Oxidative Stress and Cardiac Functions in Infants Born to Preeclamptic Mothers

2018 ◽  
Vol 36 (11) ◽  
pp. 1205-1210
Author(s):  
Didem Arman ◽  
Secil Ercin ◽  
Sevilay Topcuoğlu ◽  
Ayşem Kaya ◽  
Taner Yavuz ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Premature Infants ◽  
Stress Index ◽  
Control Group ◽  
Cardiac Functions ◽  
Total Antioxidant ◽  
Echocardiographic Parameters ◽  
Oxidant Status ◽  
The Relationship ◽  
And Oxidative Stress

Objective The present study aimed to assess the global oxidant and antioxidant status in infants born to preeclamptic mothers and their correlation with cardiac functions. Study Design We compared 40 infants born to preeclamptic mothers with 40 premature infants born to normotensive mothers. We assessed the relationship between echocardiographic measurements and total antioxidant capacity (TAC) and total oxidant status (TOS) values. Results In the study group, TAC, TOS, and oxidative stress index (OSI) levels were significantly higher in the cord blood (p = 0.03, 0.04, and 0.039, respectively) than in the control group. We did not observe any correlation between echocardiographic measurements and TAC, TOS, and OSI levels in infants born to preeclamptic mothers. Conclusion Compared with the control group, despite higher TAC levels in infants born to preeclamptic mothers, concurrent elevated OSI levels reveal that the oxidant–antioxidant balance is disturbed in favor of oxidants. Furthermore, the findings of this study suggest that echocardiographic parameters are unaffected by the oxidant status.

Oxidative stress markers in patients treated with typical and atypical antipsychotics

2011 ◽  
Vol 26 (S2) ◽  
pp. 1465-1465
Author(s):  
M. Padurariu ◽  
A. Ciobica ◽  
I. Dobrin ◽  
C. Joacabine ◽  
C. Stefanescu
Keyword(s):  
Oxidative Stress ◽  
Atypical Antipsychotics ◽  
Specific Activity ◽  
Antipsychotic Agents ◽  
Control Group ◽  
Antioxidant Defences ◽  
Stress Markers ◽  
Daily Dose ◽  
Schizophrenic Patients ◽  
And Gender

IntroductionStudies performed in schizophrenia patients have generally suggested the presence of a compromised antioxidant system, but this is not always consistent with specific observed parameters, which on the whole, show evidences of dysregulation. There are also controversies regarding the oxidative stress status in patients treated with typical vs. atypical antipsychotics.AimIn this context, the aim of the present work was to evaluate the specific activity of some peripheral antioxidant defences like superoxide dismutase (SOD) and glutathione peroxidase (GPX) and the level of a lipid peroxidation maker (malondialdehyde-MDA), in schizophrenic patients treated with typical (haloperidol) or atypical (olanzapine, quetiapine and risperidone) antipsychotics, compared with age-matched healthy subjects.MethodsThe subjects of this study (n = 45), consisted of 35 patients who met DSM-IV criteria for schizophrenia and 10 healthy control age and gender-matched subjects. Patients were of paranoid subtype, with duration of illness for at least 5 years. Nine patients were under haloperidol (1–2 mg daily dose) treatment and 26 (8/10/8) patients were under atypical treatment: quetiapine (300 mg daily dose), olanzapine (20 mg daily dose) or risperidone (2–4 mg daily dose), respectively.ResultsWe found a significant decrease in GPX specific activity and also a significant increase of MDA levels in schizophrenic patients, compared to age-matched control group, regardless of their type of treatment. Additionally, an increase in SOD specific activity was observed, mainly in the patients treated with haloperidol and quetiapine.ConclusionsFurther research is necessary in order to elucidate the effects of different antipsychotic agents on antioxidant enzymes.

scholarly journals Hypertension and diabetes mellitus association to oxidative stress in an elderly population

2018 ◽  
Author(s):  
Aleida Rodríguez-Castañenda ◽  
Katia Leticia Martínez-Gonzáles ◽  
Rosalinda Sánchez-Arenas ◽  
Sergio Sánchez-García ◽  
Israel Grijalva ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Diabetes Mellitus ◽  
Elderly Population ◽  
Influential Factor ◽  
Control Group ◽  
Oxygen Species ◽  
Group 12 ◽  
High Prevalence ◽  
Prevalence Of Diabetes Mellitus

AbstractBackgroundMexico City has the highest aging rate in the country, as well as a high prevalence of diabetes mellitus (DM) and arterial hypertension (HT). All three on their own, are known to increase oxidative stress (OE).MethodsFinal groups included 18 patients without DM or HT (control group), 12 with DM, 23 with HT, and 18 with DM and HT. The EO was measured by the quantification of reactive oxygen species (ROS), and by determination of lipid peroxidation.ResultsHAS patients showed increased ROS levels as did men with HAS compared with the respective DM and HT groups. Also, women of the control group showed higher levels of ROS compared with men. HT in an aged population turned out to be the most influential factor for oxidative stress increase while DM had no effect whatsoever.

scholarly journals Swimming Attenuates Blood Pressure and Oxidative Stress in Hypertensive Rats

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Anica Petkovic ◽  
Marko Ravic ◽  
Sasa Plecevic ◽  
Jovana Jeremic ◽  
Ivan Srejovic ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Blood Pressure ◽  
Diastolic Pressure ◽  
Control Group ◽  
Albino Rats ◽  
Positive System ◽  
Hypertensive Rats ◽  
Stress Markers ◽  
Antioxidant Parameters ◽  
And Oxidative Stress

Abstract Hypertension presents one of the main risk factors for cardiovascular diseases which are the leading cause of morbidity and mortality worldwide. Structural and mechanical changes of the heart and blood vessels as well as overproduction of reactive oxygen species may occur due to the increased blood pressure. Therewith, the goal of our study was to estimate the effects and duration of swimming as a possible therapy approach on blood pressure and oxidative stress parameters in normotensive and hypertensive rats. The study was conducted on 60 male Wistar albino rats divided into two groups, normotensive and hypertensive rats. Each of these groups was divided into three subgroups according to the swimming protocol. The swimming training was kept constant (60 min/day, for five days a week) with two days of rest. After six or nine weeks of the swimming protocol, blood pressure and oxidative stress markers were measured. The control group rats were put in water for one minute a day, in order to avoid water-induced stress. Training significantly reduced systolic blood pressure in hypertensive rats, while diastolic pressure did not change in the group that swam six or nine weeks. The results showed that swimming increases the activity of all measured antioxidative parameters, while values of prooxidants varied depending on the training protocol. Our results confirmed that swimming, as an aerobic exercise, decreases blood pressure and has time-dependent positive system adaptations, especially on the antioxidant parameters.

scholarly journals EVALUATION OF THE RELATIONSHIP BETWEEN DENTAL CARIES AND OXIDATIVE STRESS AND ANTIOXIDANT CAPACITY

2021 ◽  
Author(s):  
Ahmet Güzelçiçek ◽  
Mahmut Demir ◽  
Adnan Kirmit ◽  
MEHMET DOGAN
Keyword(s):  
Oxidative Stress ◽  
Dental Caries ◽  
Patient Group ◽  
Total Antioxidant Status ◽  
Stress Index ◽  
Control Group ◽  
Healthy Children ◽  
Markers Of Oxidative Stress ◽  
The Relationship ◽  
And Oxidative Stress

Background Dental caries can be affected or altered by the body’s oxidant / antioxidant balance and oxidative stress. Aim/Hypothesis To examine the relationship between dental caries and Total Oxidant Status (TOS), Total Antioxidant Status (TAS), and Oxidative Stress Index (OSI). Design The study group consisted of 52 children with dental caries (DMFS/dfs ≥ 5), and the control group consisted of 42 healthy children (DMFS/dfs = 0). The saliva samples, unstimulated and mid-morning, were collected from all children. Participants’ saliva samples were acquired by spitting for 5 minutes, after which the samples were frozen and stored at 4 ° C and kept at -80 ° C until analysis. NCSS (Number Cruncher Statistical System) 2007 (Kaysville, Utah, USA) was used for the statistical analysis. Results TOS of the patient group cases were statistically significantly higher than those of the control group (p=0,004; p<0,01). OSI values of the patient group cases were statistically significantly higher than those of the control group (p=0,008; p<0,01). Conclusion OSI and TOS as markers of oxidative stress levels were found to be significantly higher in the group of patients with dental caries than in the healthy group.

Evaluation of the Relationship Between Nasal Septum Deviation and Oxidative Stress Markers

2019 ◽  
Vol 30 (3) ◽  
pp. 851-853 ◽  
Author(s):  
Ufuk Düzenli ◽  
Nazim Bozan ◽  
Yasin Sonkaya ◽  
Yaser Said Çetin ◽  
Halit Demir
Keyword(s):  
Oxidative Stress ◽  
Nasal Septum ◽  
Oxidative Stress Markers ◽  
Septum Deviation ◽  
Stress Markers ◽  
Nasal Septum Deviation ◽  
The Relationship ◽  
And Oxidative Stress

scholarly journals Correlation between the Activity of Aldehyde Dehydrogenase and Oxidative Stress Markers in the Saliva of Diabetic Patients

2019 ◽  
Vol 27 (1) ◽  
pp. 67-73
Author(s):  
Hina Younus ◽  
Sumbul Ahmad ◽  
Md. Fazle Alam
Keyword(s):  
Oxidative Stress ◽  
Aldehyde Dehydrogenase ◽  
Early Stage ◽  
Control Group ◽  
Diabetic Patients ◽  
Oxidative Stress Markers ◽  
Stress Markers ◽  
Patients With Diabetes ◽  
Markers Of Oxidative Stress ◽  
And Oxidative Stress

Background: Reactive aldehydes are involved in diseases associated with oxidative stress, including diabetes. Human salivary aldehyde dehydrogenase (hsALDH) presumably protects us from many toxic ingredient/contaminant aldehydes present in food. Objective: This study aimed to probe the activity of hsALDH in patients with diabetes and than to correlate it with various oxidative stress markers in the saliva. Methods: The saliva samples were collected from total 161 diabetic patients from Rajiv Gandhi Centre for Diabetes, Jawaharlal Nehru Medical College (JNMC), AMU, Aligarh, (India). HsALDH activity and markers of oxidative stress [8-hydroxydeoxyguanosine (8-OHDG), malondialdehyde (MDA) and advanced glycation end products (AGEs)] were measured in the saliva samples. Results: Patients with early stage of diabetes had higher activity of hsALDH when compared with the control group. As the history of diabetes increases, the activity of the enzyme decreases and also higher oxidative stress markers (8-OHDG, MDA and AGEs) are detected in the saliva samples. Negative significant correlation between hsALDH activity and oxidative stress markers were observed (p <0.0001). Conclusion: The activity of hsALDH increases in early stages of diabetes most probably to counter the increased oxidative stress associated with diabetes. However, in later stages of diabetes, the activity of the enzyme decreases, possibly due to its inactivation resulting from glycation.

The Relationship between Oxidative Stress and Obesity in Prostate Disease

2012 ◽  
Vol 79 (2) ◽  
pp. 156-158 ◽  
Author(s):  
Anna Scavuzzo ◽  
Vincenzo Favilla ◽  
Sebastiano Cimino ◽  
Massimo Madonia ◽  
Giovanni Li Volti ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Adipose Tissue ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Bioactive Substances ◽  
Prostatic Disease ◽  
Prostate Disease ◽  
The Relationship ◽  
And Oxidative Stress

Recent data suggest that chronic increment of reactive oxygen species (ROS) may be involved in the development and progression of chronic prostatic disease, such as BPH and PCa; adipose tissue produces bioactive substances called adipokines, also involved in the production of ROS. Our study aims to evaluate the relationship between obesity and oxidative stress in prostate disease.

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