Total Oxidant Status Research Articles

Effects of Vitamin D on Asprosin Immunoreactivity Against Cyclophosphamide-Induced Liver Injury in Rats.

Background Cyclophosphamide (CP), commonly used as an anticarcinogenic drug, has the potential to induce detrimental effects on multiple tissues, including the liver. Asprosin, which is a glucogenic adipokine, induces the liver to secrete glucose, thus contributing to the maintenance of homeostasis. This study aims to investigate the immunoreactivity of asprosin in the liver tissue of rats exposed to CP administration, as well as the changes in its levels due to the supplementation of Vitamin D (Vit D). Materials and methods Four experimental groups were formed, including control, Vit D (200 IU/kg), CP (200 mg/kg), and Vit D+ CP. Histopathological analysis was carried out by employing staining methods on liver tissues. These techniques encompassed the application of hematoxylin-eosin (H&E), Masson's trichrome, and periodic acid Schiff (PAS). Through the application of spectrophotometric methods,concentrations of malondialdehyde (MDA), total antioxidant status (TAS), total oxidant status (TOS), and asprosin were determined. Furthermore, apoptotic cells were identified by the terminal deoxynucleotidyl transferase (TdT) dUTP nick-end labeling (TUNEL) method, and the asprosin immunoreactivity was determined by immunohistochemistry. Results Under light microscope examination, the histopathological damage was found to be more notable in the CP group compared to the control group. Moreover, a decrease was observed in serum and tissue asprosin levels, while an increase was noted in the count of apoptotic cells, along with elevated MDA and TOS levels. However, in the CP+Vit D group, Vit D administration alleviated histopathological damage. Notably, there were significant increases in TAS and asprosin levels, accompanied by reductions in both MDA and TOS levels. Conclusions The effect of CP on liver tissue was observed to result in damage and a reduction in asprosin levels. Vit D supplementation revealed elevated asprosin levels and a distinct protective effect on the tissue. Considering the association between asprosin and liver injury induced by CP, further research is needed to elucidate the mechanisms that underlie the effect of asprosin on tissues. When combined with VitD, asprosin holds promise for potential clinical applications as a therapeutic target.

INVESTIGATION OF ANTIANGIOGENIC AND APOPTOTIC EFFECTS OF GALANTAMINE OBTAINED FROM LEUCOJUM AESTIVUM ON MCF-7 BREAST CANCER CELL LINE

OBJECTIVE: The current study aims to investigate the antiangiogenic and apoptotic effects of galantamine in breast cancer cells and to add new information to the literature. MATERIAL AND METHODS: In this study, MCF-7 breast cancer cell line was used and galantamine was obtained from Leucojum aestivum by HPLC method. The effect of galantamine on cell viability was determined by CCK-8 assay at 9 different doses (control, 10, 40, 70, 100, 130, 160, 190, 210 μg/ml) including the control group. Then, to understand the effect of galantamine, other assays (total antioxidant status (TAS), total oxidant status (TOS), poly-ADP ribose polymerase (PARP), and vascular endothelial growth factor (VEGF) levels) were examined in 3 groups; control, LD50 (100 μg/ml) and high dose (210 μg/ml) group. The oxidative stress index (OSI) was then calculated. RESULTS: Galantamine decreased cell viability. The LD50 dose was determined as 100 μg/ml. There was no significant change in VEGF levels. There was a significant dose-dependent decrease in PARP levels (Control: 2.78667±0.155392, LD50: 1.51000±0.107145, High dose: 1.01000±0.054772 ng/L, p=0.000). Compared to the control group, there was a significant dose-related decrease in TAS data (Control: 0.09633±0.002658, LD50: 0.06283±0.002317, High dose: 0.04050±0.001871, p=0.000) and a significant dose-related increase in TOS data (Control: 0.12500±0.010488, LD50: 0.21667±0.015055, High dose: 0.31833±0.021370, p=0.000). A significant dose-related increase in OSI data was found. (Control: 129.964±13.018, LD50: 345.161±26.480, High dose: 788.485±78.575, p=0.000). CONCLUSIONS: It was determined that galantamine had no significant effect on angiogenesis at any dose based on VEGF levels. Galantamine had a negative effect on cell viability and proliferation at certain doses to MCF-7 cells and was found to increase oxidative stress. The decrease in PARP levels indicates the possibility that cells may result in an apoptotic process. These findings may be useful to take a different approach to the use of galantamine in cancer research.

The renoprotective effects of taurine against diabetic nephropathy via the p38 MAPK and TGF-β/Smad2/3 signaling pathways.

Diabetic nephropathy (DN), a severe diabetes complication, causes kidney morphological and structural changes due to extracellular matrix accumulation. This accumulation is caused mainly by oxidative stress. Semi-essential amino acid derivative taurine has powerful antioxidant and antifibrotic effects. The aim of this study was to investigate the renoprotective effects of taurine through its possible roles in oxidative stress, extracellular matrix proteins, and the signaling pathways associated with the accumulation of extracellular matrix proteins in DN rats. 29 Wistar albino rats were randomly separated into control, taurine, diabetes, and diabetes + taurine groups. Diabetes animals were injected 45mg/kg streptozosine. Taurine is given by adding to drinking water as 1% (w/v). Urine, serum, and kidney tissue were collected from rats for biochemical and histological analysis after 12weeks. According to the studies, taurine significantly reduces the levels of malondialdehyde (MDA), total oxidant status (TOS), and protein expression of NADPH oxidase 4 (NOX4) that increase in diabetic kidney tissue. Also, decreased superoxide dismutase (SOD) activity levels significantly increased with taurine in diabetic rats. Moreover, increased mRNA and protein levels of fibronectin decreased with taurine. The matrix metalloproteinase (MMP)-2 and MMP-9 activities and their mRNA levels increased significantly, and this increase was significantly summed with taurine. There was a decrease in mRNA expression of Extracellular matrix metalloproteinase inducer (EMMPRIN). Taurine significantly increased this decrease. Diabetes increased mRNA expressions of transforming growth factor (TGF)-β and Smad2/3. Taurine significantly reduced this induction. TGF-β protein expression, p38, and Smad2/3 activations were also inhibited, but taurine was suppressed significantly. All these findings indicate that taurine may be an effective practical strategy to prevent renal diabetic injury.

THU351 Reduced Total Antixoxidant Capacity In Type 1 DM Without Chronic Complications

Abstract Disclosure: S.C. Oliveira: None. C.S. Oliveira: None. C.S. Stein: None. M.W. Lauria: None. R.N. Moresco: None. F.V. Comim: None. M.O. Premaor: None. Type 1 diabetes mellitus (T1DM) is a condition associated with chronic inflammation and disturbances in the oxidative stress balance, which may be related to its complications. Our study aimed to investigate some REDOX markers ( TOS=total oxidant status ; TAC= total antioxidant capacity; FRAP =ferric reducing ability of plasma; AOPP=advanced oxidation protein products) in subjects with type 1 diabetes and controls. The local ethics committee approved this study. Overall, 51 subjects with T1DM and 106 controls were evaluated in an outpatient clinic. The age in T1DM group was (mean +− SD) 43.7 +− 17 years versus 43.1 +− 13.5 years in controls (NS).The proportion of smokers (17% vs. 15%) and ethnic composition were comparable between the groups. The mean +− SD HbA1c was 8.15 +− 1.65 % in diabetic patients. Concerning REDOX markers, we could observe a significant reduction in the TAC in T1DM (mean +− SD ) of 1.32 +− 0.17 against 1.47 +− 0.16 mmol Trolox equiv/ L(p<0.001) but not other oxidative stress markers. In the sequence, we proceed with the analysis of four subgroups: group 1: T1DM without any diabetic complication or high blood pressure and BMI <25kg/m2; group 2: T1DM with any diabetic complication, high blood pressure or BMI >= 25 kg/m2; group 3: normal controls without the high blood pressure and BMI <25kg/m2; group 4: controls with metabolic disease(excluding T2DM)and high blood pressure or BMI >= 25 kg/m2. Analyzing the profile of groups 1,(T1DM without complications) against group 3(normal controls), we noted a reduced TAC (mean +− SD) of 1.34 +− 0.2 in G1 versus 1.47 +− 0.16 mmol Trolox equiv/ L in G3 ( p=0.006). No significant differences were perceived in relation to TOS ( mean +− SD) of 102.33 +− 43 in G1 vs. 88.57 +− 48.7 micromol H2O2 equiv/L in G3, FRAP 287 +− 64.5 in G1 vs 306.6 +− 72 micromol/L in G3, or AOPP 252.11 +− 127 in G1 vs 260.38 +− 152 micromol/L in G3. Our results suggest that a reduction in the total antioxidant capacity is present in normal blood pressure T1DM even without chronic complications. Presentation: Thursday, June 15, 2023

Changes in and the Relationships between Alpha-Klotho, Oxidative Stress, and Systemic Inflammation in Cigarette Smokers

ABSTRACT Background: Although smoking is known to accelerate aging, the mechanisms by which this occurs have not been fully clarified. Serum-soluble α-Klotho (sαKl), antiaging, anti-inflammatory, and developing resistance to oxidative stress properties are known. Aim: This study aimed to determine the relationship between cigarette smoking, saKl (antiaging hormone), inflammation, and oxidative stress. Materials and Methods: Participants included in the study were divided into smoking and nonsmoking groups. sαKl, high-sensitivity C-reactive protein (hsCRP), total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI) were assessed and compared in the study participants. Results: There were one hundred and forty-six study participants comprising 47 (32.2%) females and 99 (67.8%) males. There were 79 (54.1%) in the nonsmoking group and 67 (45.9%) in the smoking group. A significant difference was found between the groups in respect of TAS (P < 0.001), OSI (P = 0.017), sαKl (P = 0.013), and hsCRP (P = 0.024) values. A significant negative correlation was found between the sαKl values of the smoking group and the years of smoking (r = -0.271, P = 0.038) and pack-years (r = -0.299, P = 0.021). Among the smoking group, a lower median sαKl value of <3.84 pg/ml was significantly associated with years of smoking (P = 0.028) and pack-years (P = 0.012). Conclusions: This study found that sαKl, OSI, and hsCRP were elevated in those who smoke cigarette. Large prospective studies are needed to further elucidate this area of research.

Effect of mode of delivery on neonatal oxidative stress and dynamic thiol-disulfide homeostasis.

To evaluate the effect of the mode of delivery on neonatal oxidative stress and dynamic thiol-disulfide homeostasis. Sixty women who were followed up in the Obstetrics and Gynecology clinic were included in this prospective study. Cord blood samples were obtained from women who underwent cesarean section (CS) and vaginal delivery (VD). Total oxidant status and total antioxidant status levels were measured by spectrophotometry. The dynamic thiol-disulfide balance was determined by colorimetry. The total antioxidant status and oxidative stress index levels were higher and total oxidant status levels were lower in the VD group compared with the CS group. Native and total thiol levels were higher while disulfide levels were lower in the VD compared with the CS delivery group, while disulfide levels were higher in the CS group. These results indicate that disulfide formation leads to decreased antioxidant capacity in women undergoing CS. Monitoring of dynamic thiol-disulfide levels may thus provide clinicians with important information on the oxidative stress status in newborns.

Cytotoxic activity of TRPV4 antagonist RN-1734 in G-361 human melanoma cancer cell line

Purpose: Intracellular calcium (Ca2+) signaling plays a role in many cellular events, such as cell proliferation and differentiation, gene transcription, oxidative stress, the antioxidant system, and apoptosis. Transient receptor potential vanilloid 4 (TRPV4) channels are non-selective cation (Ca2+) channels. The present study aims to investigate the cytotoxic activity of RN-1734, a transient receptor potential vanilloid 4 (TRPV4) antagonist, in the G361 human melanoma cancer cell line. 
 Materials and Methods: The effects of RN-1734 on G361 cell viability at concentrations of 1, 5, 25, 50, and 100 μM were measured using the 3-(4,5-dimethylthiazol-2-il)-2,5-diphenyltetrazolium bromide (MTT) method. Total antioxidant status (TAS) and total oxidant status (TOS) levels were determined using a ready-made commercial kit, after which oxidative stress index (OSI) values were calculated. To determine the apoptotic effects of RN-1734, Bcl-2, Bax, and p53 expression levels, caspase-3 and -8 activities were examined via quantitative real-time PCR analysis. 
 Results: G361 cell viability significantly decreased to 82.72, 72.81, 56.36, 39.16 and 18.96% in RN-1734 groups (1, 5, 25, 50 and 100 μM) compared to the control group (100.00%). At IC50 concentration (39.48 μM), RN-1734 application (3.35 mmol/g prot.-TAS, 45.87 μmol/g prot.-TOS, and 1501.97 AU-OSI) increased the TAS level (2.17 mmol/g prot.) and decreased the TOS level (55.41 μmol/g prot.) and OSI value (3142.76 AU) compared to the control group. 
 Conclusion: Our findings show that RN-1734 may be a novel therapeutic approach to treating melanoma by decreasing the cell viability of G361 human melanoma cancer cells.

Efficacy and Safety of Thymoquinone on Suppression of Tumor Growth in N-butyl-N-(4-hydroxybutyl)-Nitrosamine -Induced Bladder Cancer in Rats

Bladder cancer is one of the most common genitourinary malignancies worldwide, the therapeutic approaches for suppression of urothelial tumor and progression toward distant metastasis are not convincing. The present study was conducted to explore the curative effect and safety of THQ in N-butyl-N-(4-hydroxybutyl) nitrosamine (BBN) induced bladder cancer in rat.
 Twenty-two male Wister albino rats were allocated into three group G1; served as control (n=6) received only the vehicle. G2: carcinogen group (n=6); animals had 0.05% BBN in drinking water for nine weeks. G3: Treatment group (n=10); THQ was administered at a dose of 50mg/Kg/day orally one week prior to the last exposure of BBN and continued till week 20. The bladder wall of all the animals was examined macroscopically for assessment of the number and the surface area of the lesions using Image J software program. Histopathological evaluation was also done for abnormal morphological alterations. Serum was analyzed for measurement of total oxidant status (TOS) and nuclear factor kappa- κB (NF-κB), transforming growth factor beta-1 (TGF-β1) as well as vascular endothelial growth factor (VEGF). Safety of THQ in respect of hematological, liver and renal function were also investigated. Bladder lesions in the THQ-treated group was reduced versus the carcinogen group. Histopathological findings in THQ-treated group demonstrated a significant improvement in the abnormal morphological growth in bladder, the TOS, NF-kβ, TGF-β, VEGF were mitigated non-significantly in the treatment group. The safety profile of THQ showed no significant deleterious effect on hematological, liver and renal function parameters with no signs of toxicity. THQ inhibited the development of neoplastic, preneoplastic transformations and it suppressed premalignant and malignant lesion formation in a rat model of bladder cancer. This might be due to antioxidant and anti-inflammatory properties of THQ. These data suggested that THQ may be effective and safe in ameliorating urinary bladder carcinogenesis.

Influence of the circadian cycle, sex and production stage on the reference values of parameters related to stress and pathology in porcine saliva

BackgroundThe concentration of biomarkers in saliva could be influenced by several factors not related to the specific condition under analyses, which should be considered for proper clinical interpretation. In the present study, the circadian rhythm of C-reactive protein (CRP), haptoglobin (Hp), Pig-MAP, S100A12, Cu, Zn, Adenosine deaminase (ADA), total protein (TP), total antioxidant capacity (TAC), total oxidant status (TOS), oxidative stress index (OSI), cortisol and α-amylase in saliva of 20 female and 20 male pigs was investigated. Moreover, the influence of sex and production phase (post-weaning, fattening and finishing) on the concentrations of biomarkers in a total of 414 healthy pigs was studied and the reference intervals for all salivary biomarkers were calculated accordingly.ResultsAll parameters except Pig-MAP, OSI and α-amylase varied significantly along the daytime, and most of them peak around early afternoon (13–15 h). The cosinor analysis described the temporal dynamics of circadian rhythms for all parameters. The range values showed differences between male and female pigs in 8 out of the 13 biomarkers, with higher concentrations in females in comparison to male pigs. The influence of the production phase on the salivary concentrations was observed for all the biomarkers. The highest concentrations were observed for Pig-MAP, S100A12 and α-amylase in post-weaning animals, for TP in growing pigs and for OSI in finishing animals. Most of the sex-influenced biomarkers showed the highest concentrations at growing stages with some exceptions such as ADA or Hp that showed the peak at finishing and post-weaning stages respectively.ConclusionsIt is necessary to establish the optimal daytime for routine saliva sampling to avoid circadian variations and for that end, the time interval between 10:00 a.m. to 12:00 a.m. is highly recommended. The factors sex and production phase influence the concentration of biomarkers and should be considered for proper biomarker interpretation. The reference intervals presented here for each salivary biomarker will help to correctly interpret the results of these analytes and contribute to the use of saliva as a non-invasive sample for the diagnosis and monitoring of the health status of swine farms.

Evaluation of the combined effects of Turkish mad honey and 5-Fluorouracil in colon cancer model in rats

It was aimed to evaluate the regressive effect of grayanotoxin-rich Turkish mad honey and 5-fluorouracil (5-FU), separately and together by using the N-methyl-N-nitrosourea (MNU)-induced colon cancer modelling in rats. Study groups were designed as control group (CG), cancer control group (CCG), 5-Flourouracil group (FUG), Turkish mad honey group (HG), Turkish mad honey and 5-FU combined group (FU-HG). White blood cell (WBC), lymphocyte, eosinophil, basophil, serum lactate dehydrogenase (LDH), total oxidant status (TOS), and total protein values of the rats in the CCG were significantly lower than the values of the rats in the CG, whereas serum Bcl-2 and survivin levels were significantly higher in the rates belonged to the CCG in comparison to those in the CG. The presence of anaplastic epithelial cells, vascularization, precancerous changes, and inflammatory infiltration detected in the colon and small intestine of the rats in FU-HG, FUG, HG were less intense (P<0.05) compared to the findings in the rats in CCG. In conclusion, mad honey and 5-FU reduced anaplastic cell growth and oxidative stress via suppressed anti-apoptotic activity. Considering the histopathological findings in the liver and kidney, no toxicity occurred related to mad honey and 5-FU metabolization. Therefore, the combined use of these two substances may be an alternative method in the treatment of colon cancer.

Evaluation of histologic, antiapoptotic and antioxidant effects of melatonin against the acute ocular toxicity of Cisplatin

This study aimed to investigate the protective effect of melatonin against the acute toxicity of cisplatin in ocular tissues. The eyes of 40 rats were divided into 4 groups: Control group (10 rats), Melatonin (Mel) group (10 rats), Cisplatin (Cis) group (10 rats), Melatonin (Mel) + Cisplatin (Cis) group (10 rats). Retina, cornea, and ciliary body tissues were examined after hematoxylin-eosin staining of sections obtained from the eyes and were scored for disorganization and degeneration. Apoptotic cells were counted for the retina, cornea, and ciliary body with the TUNEL (Terminal deoxynucleotidyl transferase dUTP nick end labeling) method. The total antioxidant status (TAS) / total oxidant status (TOS) of homogenized eye tissues were measured. While apoptotic cells were found to increase in the cornea of the Cisplatin (Cis) group, no difference was found regarding the retina and ciliary body cell count. An increased number of apoptotic cells in the cornea of the Cis group was found while there was a decrease in the group where Cisplatin and Melatonin were administered together (Mel+Cis group). There was no statistically significant difference amongst groups for TOS or TAS. Melatonin had a partial protective effect against histological damage.

Investigación de cambios en parámetros hematológicos y niveles de factores de estrés oxidativo en gatos castrados

This study was carried out to determine the effect of castration procedure on hemogram and leukogram values and the levels of oxidative stress factors in serum tissue in cats. Preoperative and postoperative 10th day hemogram/leukogram values and total oxidant/antioxidant capacities of 19 castrated cats were evaluated in the study. When the hemogram and leukogram values were examined, it was determined that there was a statistically significant increase in the amount of eosinophils (P<0.05). Although the increase in white blood cells (WBC), neutrophil and lymphocyte levels and the decrease in red blood cells (RBC) and hematocrit (HCT) levels were remarkable, it was not found to be statistically significant (P>0.05). When the levels of oxidative stress factors in the serum tissues of the cats were examined, it was determined that there was a decrease in the total antioxidant status (TAS) and an increase in the total oxidant status (TOS), but the difference in the results was not statistically significant (P>0.05). In conclusion, in this study, it was determined that the castration procedure in cats did not cause a significant difference in hemogram and leukogram parameters and the level of oxidative stress factors in serum tissue, except for the amount of eosinophils.

IRBESARTAN REDUCES LIVER DAMAGE INDUCED BY LIPOPOLYSACCHARIDE VIA INHIBITION OF TOTAL OXIDANT STATUS, INTERLEUKIN-1B AND CASPASE-3 LEVELS

Objective
 In septic conditions, hyperinflammatory response
 and hepatotoxicity are caused by oxidative stress,
 inflammation, and apoptosis. Irbesartan (IB), an
 adrenergic receptor blocker, has anti-inflammatory and
 antioxidant properties. This study aimed to investigate
 the protective effect of IB on lipopolysaccharide (LPS)-
 induced acute hepatotoxicity.
 Material and Method
 A total of eight rats were used in three groups; a control
 group; LPS group [5 mg/kg, intraperitoneally (IP)];
 and LPS + IB group [5 mg/kg LPS (IP) + 50 mg/kg IB
 (orally)]. After sacrification, tissues from the liver and
 blood were obtained for immunohistochemical and
 biochemical evaluations, such as interleukin-1 beta
 (IL-1β), caspase-3 (Cas-3) alanine aminotransferase
 (ALT), aspartate aminotransferase (AST), oxidative
 stress index (OSI), total oxidant status (TOS), and
 total antioxidant status (TAS).
 Results
 Compared with the control group, increased AST
 and ALT levels in the blood, biochemically increased
 TOS and OSI and decreased TAS levels in the
 tissue, immunohistochemically increased IL-1β, Cas-
 3, detected. Also, in liver tissue, histopathologically
 hyperemia, hemorrhage, vacuolization, and
 significant neutrophilia infiltration were found in the
 LPS group. IB administration significantly reversed
 all these parameters. TAS levels were increased
 by IB administration, whereas TOS and OSI levels
 were decreased (p = 0.001). IB also decreased
 AST and ALT values (p = 0.001). In the IB group,
 Cas-3 and IL-1β levels were significantly decreased
 by IB administration (p = 0.001). In addition, the
 IB ameliorated histopathological findings showed
 enhanced hyperaemia, haemorrhages, vacuolisation
 and significant neutrophilic leukocyte infiltration
 (p = 0.001). IB treatment attenuated LPS-induced
 hepatotoxicity by its antioxidant, anti-inflammatory and
 antiapoptotic properties.
 Conclusion
 Attenuating liver injury and restoring liver function lowers
 morbidity and mortality rates in patients with sepsis.
 IB protects liver tissue from hepatotoxicity caused by
 LPS thanks to its antioxidant, anti-inflammatory, and
 anti-apoptotic properties. Further investigation of the
 liver’s role in sepsis may lead to the development of
 new therapeutic targets and strategies. IB may be
 an alternative therapeutic agent for the prevention of
 acute hepatotoxicity during sepsis.

The Supplementation of Sechium edule var. nigrum spinosum (Chayote) Promotes Nrf2-Mediated Antioxidant Protection in Older Adults with Metabolic Syndrome.

The aim was to determine the effect of Sechium edule var. nigrum spinosum (chayote) on gene expression related to antioxidant protection mechanisms and the inflammatory process in older adults with metabolic syndrome (MetS). A quasi-experimental study was carried out in a convenience sample of 46 older adults diagnosed with MetS: (i) placebo group (PG; n = 20); (ii) experimental group (EG; n = 26). The clinical, biochemical, anthropometric parameters and SOD, GPx, and CAT enzyme activity, alongside total oxidant status (TOS), total antioxidant status (TAS), oxidative stress index (OSI), cytokines (IL-6, IL-8 and TNF-α), and mRNA expression of SOD, GPx, CAT, IL-6, IL-8, TNF-α, Nrf2, NFkB p50, and NFkB p65, were measured at baseline and 6 months post-intervention. A statistically significant decrease was observed in TOS (baseline, 28.9 ± 3.6 vs. post, 23.7 ± 3.4, p < 0.01) and OSI (baseline, 24.1 ± 3.8 vs. post, 17.7 ± 4), as well as an increase in IL-6 (baseline, 10.7 ± 1.1 vs. post, 12.3 ± 2, p = 0.03), SOD activity (baseline, 167.1 ± 11.9 vs. post, 180.6 ± 7.6, p < 0.05), CAT activity (baseline, 1.0 ± 0.2 vs. post, 1.3 ± 0.2, p < 0.01), and TAS (baseline, 1.1 ± 0.1 vs. post, 1.4 ± 0.1, p < 0.01) in the EG compared to the PG. Regarding the expression of Nrf2, SOD, and IL-6, the EG showed a significant increase vs. basal levels (47%, 44%, and 43%, respectively). Our findings suggest that Sechium edule supplementation promotes the antioxidant response and decreases oxidative stress via Nrf2.

Redox Status and Telomere-Telomerase System Biomarkers in Patients with Acute Myocardial Infarction Using a Principal Component Analysis: Is There a Link?

In the present study, we examined redox status parameters in arterial and venous blood samples, its potential to predict the prognosis of acute myocardial infarction (AMI) patients assessed through its impact on the comprehensive grading SYNTAX score, and its clinical accuracy. Potential connections between common blood biomarkers, biomarkers of redox status, leukocyte telomere length, and telomerase enzyme activity in the acute myocardial infarction burden were assessed using principal component analysis (PCA). This study included 92 patients with acute myocardial infarction. Significantly higher levels of advanced oxidation protein products (AOPP), superoxide anion (O2•-), ischemia-modified albumin (IMA), and significantly lower levels of total oxidant status (TOS) and total protein sulfhydryl (SH-) groups were found in arterial blood than in the peripheral venous blood samples, while biomarkers of the telomere-telomerase system did not show statistical significance in the two compared sample types (p = 0.834 and p = 0.419). To better understand the effect of the examined biomarkers in the AMI patients on SYNTAX score, those biomarkers were grouped using PCA, which merged them into the four the most contributing factors. The "cholesterol-protein factor" and "oxidative-telomere factor" were independent predictors of higher SYNTAX score (OR = 0.338, p = 0.008 and OR = 0.427, p = 0.035, respectively), while the ability to discriminate STEMI from non-STEMI patients had only the "oxidative-telomere factor" (AUC = 0.860, p = 0.008). The results show that traditional cardiovascular risk factors, i.e., high total cholesterol together with high total serum proteins and haemoglobin, are associated with severe disease progression in much the same way as a combination of redox biomarkers (pro-oxidant-antioxidant balance, total antioxidant status, IMA) and telomere length.

Oxidative stress may be a contributing factor in fibromyalgia patients' pain mechanisms.

The pathophysiology of fibromyalgia (FM), a continuously painful syndrome with no known origin, has been related to mitochondrial dysfunction, oxidative stress, and inflammation. Recent studies have shown that FM may be associated with an oxidative balance disorder. The objective of this study was to measure the levels of oxidative stress in FM patients and try to understand the association between FM and free radicals. This study was performed on 100 volunteers admitted to the University of Health Sciences, Sultan 2, Abdulhamid Han Health Application and Research Center Physical Therapy and Rehabilitation Clinic, including 50 healthy controls and 50 patients with FM. To analyze oxidative stress biomarkers, total oxidant status (TOS) and total antioxidant status (TAS) levels were measured. Total thiol (TT) and native thiol (NT) concentrations were measured to determine the relationship between thiol groups. Disulfide (DIS) and oxidative stress index (OSI) were calculated with mathematical formulas. While TOS and OSI levels were statistically higher in FM patients, TAS levels were significantly lower compared to the healthy control group (p<0.001). In comparison to the healthy control group, FM patients had considerably decreased TT and NT levels. DIS levels were significantly higher in FM patients than in controls (p<0.001). Reactive oxygen species have several negative impacts on the human body. As a result of the measurements we analyzed, the relationship between FM and oxidative stress should be studied in terms of disease progression and may help improve the treatment process.

Effects of adverse semen parameters on total oxidation status and DNA/chromatin integrity

BackgroundInfertility is a major health problem that affects 7% of the men’s population. Oxidative stress (OS) plays a significant role in the pathophysiology of male infertility. The purpose of this study comparatively evaluated the total anti-oxidation status and DNA/chromatin integrity in semen samples among different infertile men’s groups compared with the normozoospermic men.MethodsThis cross-sectional study contains four experimental groups, including teratozoospermia (Exp I), asthenoteratozoospermia (Exp II), oligoasthenoteratozoospermia (Exp III), and azoospermia (Exp IV), as well as the control group of normozoospermic men. The total antioxidant capacity (TAC) and total oxidant status (TOS) were assessed by applying the enzyme-linked immunosorbent assay. The chromatin/DNA damage was assessed in semen samples of all study groups by applying chromomycin A3 (CMA3) and toluidine blue (TB) staining methods.ResultsThe results showed significantly higher proportions of TB+ and CMA3 positive sperm in all experimental groups compared to controls (P < 0.001). TAC, TOS, and the ratio of TAC to TOS were significantly different in all experimental groups compared to the normozoospermic men (P < 0.001).ConclusionOur study demonstrated that at least one sperm parameter abnormality, such as teratozoospermia could cause serious defects at the levels of DNA/chromatin as well as the antioxidants to oxidant balance of human spermatozoa in subfertile men with abnormal spermogram. Infertile men with sperm morphological abnormalities may benefit from simultaneous assessment of sperm DNA defects and OS.

Evaluation of ameliorative potential of antioxidants and/or immunomodulators in contagious caprine pleuropneumonia affected Himalayan Pashmina goats

Contagious caprine pleuropneumonia causes oxidative stress and immune disturbances in affected goats. Hence these derogative alterations aggravate the pathogenesis and severity of this disease, thus, necessitating utilization of antioxidants and/or immunomodulators in the therapeutic regimes of contagious caprine pleuropneumonia. Present study evaluated ameliorative effects of N-acetyl cysteine (NAC) and alpha tocopherol (vitamin E) in association with primary antibiotic tylosin treatment in contagious caprine pleuropneumonia affected test goats in comparison to antibiotic only treated goats (n=6) and healthy goats (n=6). N-acetyl cysteine given at a dose of 12 mg per kg of body weight orally daily for 7 days, showed better antioxidant effect by significantly ameliorating oxidative stress (41.4%) compared to other treatments; besides, decreasing total oxidative status (TOS) and increasing total antioxidant status (TAS). Immunomodulatory potential of alpha tocopherol given at a dose of 10 mg per kg of body weight orally daily for 7 days, was found to be comparatively better than NAC in decreasing percentage of neutrophils and increasing percentage of lymphocytes; besides, decreasing the levels of tumor necrosis factor-α (TNF-α) and immunoglobulin G (IgG) when the modulation of total leukocyte count and differential leukocyte count was comparable between the two. Thus, it can be concluded from this study that NAC acts as a comparatively better antioxidant and alpha tocopherol as better immunomodulator when used in the therapeutic regimes of contagious caprine pleuropneumonia.

Effects of vitamin E and selenium administration on transportation stress in pregnant dairy heifers

We investigated the effects of road transportation and administration of the vitamin E and selenium (ESe) on circulating cortisol, haptoglobin, blood metabolites, oxidative biomarkers, white blood cell profiles, and behaviors in pregnant dairy heifers. Forty pregnant Holstein heifers were randomly assigned to one of 4 treatments: no transportation and no ESe administration, no transportation and ESe administration, transportation and no administration, and transportation and ESe administration. The ESe (70 IU/kg dry matter feed of dl-α-tocopheryl acetate and 0.3 mg/kg dry matter feed of sodium selenite) was orally delivered once a day from 7 d before transportation to 3 d after transportation. The heifers were transported in trucks designed for cattle transportation. Blood was collected 1 h before transportation, immediately after transportation (IAT), and at 6, 24, and 48 h after transportation. Behaviors were recorded using a video camera for 2 consecutive days after transportation. Transported/non-ESe-administered heifers had greater cortisol at IAT, haptoglobin at 6 and 24 h after transportation, total oxidative status at 6 h after transportation, and nonesterified fatty acid levels, white blood cell numbers, and neutrophil percentages at IAT and 6 h after transportation in the blood than nontransported heifers. Transported/non-ESe-administered heifers had lower total antioxidative status levels at 48 h after transportation and lymphocyte percentages at IAT and 6 h after transportation than nontransported heifers. Lying time was shorter in transported heifers than nontransported/non-ESe-administered heifers. Transported/ESe-administered heifers had lower cortisol, total oxidative status, nonesterified fatty acid levels at IAT, and haptoglobin concentrations at 6 and 24 h after transportation than transported/non-ESe-administered heifers. Transported/ESe-administered heifers had greater total antioxidative status levels at 48 h after transportation than transported/non-ESe-administered heifers. No ESe administration effects were observed for white blood cell number and neutrophil and lymphocyte percentages and lying time. In conclusion, road transportation caused temporary oxidative stress. Administrating ESe partially alleviated the stress, suggesting that ESe administration could be a viable strategy to reduce stress in transported pregnant heifers, providing a novel role of vitamin E and selenium for improving animal welfare.

Dynamic fecal microenvironment properties enable predictions and understanding of peripartum blood oxidative status and nonesterified fatty acids in dairy cows

The transition period in dairy cows is a critical stage and peripartum oxidative status, negative energy balance (NEB), and inflammation are highly prevalent. Fecal microbial metabolism is closely associated with blood oxidative status and nonesterified fatty acids (NEFA) levels. Here, we investigated dynamic changes in total oxidative status markers and NEFA in blood, fecal microbiome, and metabolome of 30 dairy cows during transition (-21, -7, +7, +21 d relative to calving). Then the Bayesian network and 9 machine-learning algorithms were applied to dismantle their relationship. Our results show that the oxidative status indicator (OSI) of -21, -7, +7 d was higher than +21 d. The plasma concentration of NEFA peaked on +7 d. For fecal microenvironment, a decline in bacterial α diversity was observed at postpartum and in bacterial interactions at +7 d. Conversely, microbial metabolites involved in carbohydrate, lipid, and energy metabolism increased on +7 d. A correlation analysis revealed that 11 and 10 microbial metabolites contributed to OSI and NEFA variations, respectively (arc strength >0.5). The support vector machine (SVM) radial model showed the highest average predictive accuracy (100% and 88.9% in the test and external data sets) for OSI using 1 metabolite and 3 microbiota. The SVM radial model also showed the highest average diagnostic accuracy (100% and 91% in the test and external data sets) for NEFA with 2 metabolites and 3 microbiota. Our results reveal a relationship between variation in the fecal microenvironment and indicators of oxidative status, NEB, and inflammation, which provide a theoretical basis for the prevention and precise regulation of peripartum oxidative status and NEB.