Serum Glutathione Peroxidase Levels Research Articles

The clinical significance of monitoring serum levels of glutathione peroxidase and selenium in patients with polycystic ovary syndrome

[Objective] This study aims to analyze the levels of the trace element selenium (Se), glutathione peroxidase (GSH-Px), and total antioxidant capacity (TAC) in the serum of women with polycystic ovary syndrome (PCOS) compared to women with normal menstrual cycles. By examining the relationship between Se levels, oxidative stress (OS), and PCOS, the study provides a theoretical basis for the supplementation of the potent antioxidant Se in women with PCOS, aiming to improve the prevention and management of PCOS and reduce its complications.[Methods] Sixty-six females diagnosed with PCOS for the first time from June 2022 to June 2023 at the Shenzhen Hospital of Guangzhou University of Chinese Medicine (Futian) were selected as the observation group. Sixty-eight healthy volunteers with regular menstrual cycles were randomly selected as the control group. Serum levels of GSH-Px, TAC, and Se were measured and statistically analyzed for both groups.[Results] Serum levels of Se, TAC, and GSH-Px were significantly lower in the observation group compared to the control group (P<0.05), indicating a statistically significant difference.[Conclusion] The deficiency of the trace element Se leads to a reduction in OS indicators, including levels of GSH-Px and TAC. It is inferred that Se deficiency may be associated with the pathogenesis of PCOS to a certain extent.

Evaluation of Glutathione Peroxidase and Glutathione Reductase Enzymes in Iraqi Patients with Colorectal Cancer

Glutathione peroxidase, and glutathione reductase Enzymes have a significant role in colorectal cancer (CRC) progression. The objective of this article is to measure glutathione peroxidase, and glutathione reductase enzymes in colorectal cancer patients and compare them with healthy subjects. Seventy newly diagnosed colorectal cancer patients were enrolled in the present study and divided as follows; Group A: (n=32) with an age range (of 20-40 years); Group B: (n=38) with age range (41-60 years). For comparison, total of (30) healthy subjects were also inserted in the current study divided into patients in the same manner. Serum levels of glutathione peroxidase and glutathione reductase enzymes were measured for patients and controlled by the ELISA technique. The current study shows that serum glutathioneperoxidase levels varied significantly in (the 20-40 years) group when comparing the patient and control group (395.5 ng/ml vs. 71.61 ng/ml, p-value less than 0.0001) and also in (41-60 years) group with mean (469.4 ng/ml vs. 106.3 ng/ml, p-value less than 0.0001) for patients and control groups respectively. Antioxidant enzymes including glutathione peroxidase, and glutathione reductase were increased in colorectal cancer patients compared to healthy subjects, significantly. According to the current study, the evolution of these enzymes can be used to understand the pathophysiology of disease and also to diagnosethe colorectal cancer.

The effects of a mixture of small peptide chelating minerals and inorganic minerals on the production performance and tissue deposition of broiler chickens.

Due to the limited bioavailability of inorganic trace minerals, their utilization in poultry production has led to problems such as environmental contamination and inefficient resource utilization. It was investigated whether replacing inorganic trace minerals (ITM) with a blend of organic small peptide-chelated trace minerals (MIX) would improve production performance, selected biochemical parameters, antioxidant capacity, mineral deposition in liver, heart, and tibia, as well as mineral content in feces of broilers. A total of 432 healthy 21-day-old 817 broilers were randomly divided into 4 groups with 6 replicates per group and 18 chickens per replicate. The control group received a basal diet supplemented with 1,000 mg/kg of inorganic trace minerals as sulfate. The experimental groups received basal diets supplemented with 200, 400, and 600 mg/kg of mixed trace mineral elements (50% sulfate +50% small peptide-chelate) for a trial period of 30 days, divided into two stages: 21-35 days and 36-50 days. The results indicate that on the 50th day, compared with the 1,000 mg/kg ITM group, the levels of serum cholesterol, urea nitrogen, and malondialdehyde in the 200, 400, and 600 mg/kg MIX groups decreased (p < 0.01), while the levels of serum glutathione peroxidase in the 200, 400, and 600 mg/kg MIX groups increased (p < 0.05). Compared to the ITM group, the addition of organic small peptide chelated trace minerals mixed with inorganic trace minerals can reduce the levels of zinc and manganese in feces (p < 0.01). Furthermore, the iron content in the heart and tibia of the 600 mg/kg MIX group also significantly decreased (p < 0.05). There were no differences in growth performance and slaughter performance among the groups (p > 0.05). This study shows that replacing inorganic minerals with low-dose MIX (200, 400, and 600 mg/kg) can reduce the levels of zinc and manganese in feces, with no negative impact on growth and slaughter performance.

Metabolomics of interventional effects of Coptidis Rhizoma and its processed products on oral ulcer due to excess heat in rats

Ultra-high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry(UPLC-Q/TOF-MS) was employed to examine the impact of Coptidis Rhizoma(CR) and its processed products on the metabolism in the rat model of oral ulcer due to excess heat and to compare the effectiveness of CR and its three products. Male SD rats were randomly allocated to the sham-operation(Sham), model(M, oral ulcer due to excess heat), CR, wine/Zingiberis Rhizoma Recens/Euodiae Fructus processed CR(wCR/zCR/eCR), and Huanglian Shangqing Tablets(HST) groups. Except the Sham group, the other groups were administrated with Codonopsis Radix-Astragali Radix decoction by gavage for two consecutive weeks. The anal temperature and water consumption of rats were monitored throughout the modeling period of excess heat. Following the completion of the modeling, oral ulcer was modeled with acetic acid. Hematoxylin-eosin(HE) staining was employed to observe the mucosal pathological changes in oral ulcer. A colorimetric assay was employed to determine the serum level of glutathione peroxidase(GSH-Px). Enzyme-linked immunosorbent assay(ELISA) was conducted to determine the levels of tumor necrosis factor-alpha(TNF-α), interleukin-6(IL-6), interleukin-1β(IL-1β), superoxide dismutase(SOD), and malondialdehyde(MDA) in the serum. The non-targeted metabolomics analysis based on UPLC-Q/TOF-MS was conducted on the serum samples. Metabolic profiles were then built, and the potential biomarkers were screened by principal component analysis(PCA) and orthogonal partial least squares discriminant analysis(OPLS-DA). The Mev software was used to establish a heat map and conduct cluster analysis on the quantitative results of the markers. The online databases including MBRole, KEGG, and MetaboAnalyst were used for pathway enrichment analysis and metabolic network building. The experimental results showed that the modeling led to pathological damage to the oral mucosa, elevated serum levels of TNF-α, IL-6, IL-1β, and MDA, and lowered levels of SOD and GSH-Px in rats. The drug administration recovered all the indices to varying extents, and wCR exhibited the best performance. Non-targeted metabolomics identified 48 differential metabolites including 27 metabolites in the positive ion mode and 21 metabolites in the negative ion mode. Five enriched pathways were common, including glycerophospholipid metabolism, linoleic acid metabolism, and tyrosine metabolism. Conclusively, CR and its three processed products could alleviate the inflammation and oxidative stress injury in rats suffering from oral ulcers due to excess heat by regulating lipid and amino acid metabolism. Notably, wCR demonstrated the most significant therapeutic effect.

Indexes of ferroptosis and iron metabolism were associated with the severity of diabetic nephropathy in patients with type 2 diabetes mellitus: a cross-sectional study.

To explore the correlations between diabetic nephropathy (DN) and serum levels of glutathione peroxidase 4 (GPX4), acyl-CoA synthetase long-chain family member 4 (ACSL4), iron, transferrin (Tf), and ferritin in patients with type 2 diabetes mellitus (T2DM). According to the urinary albumin excretion rate(UAER) or estimated glomerular filtration rate (eGFR) levels, a total of 123 patients with T2DM were separately divided into normoalbuminuria (NO), microalbuminuria (MI), macroalbuminuria (MA) groups, and G1 (eGFR ≥ 90 mL/min), G2 (eGFR ≤ 60 mL/min to < 90 mL/min), and G3 groups (eGFR< 60 mL/min), with 33 healthy participants as the control (HC). The differences in serum GPX4, ACSL4, iron, Tf, and ferritin levels between groups were compared, and the relationships between these levels were analysed. The independent correlations between UAER or DN severity and serum GPX4, ACSL4, iron, Tf, and ferritin levels were analysed by multiple linear and multinomial logistic regression, respectively. To the patients with T2DM, with the increase in UAER levels, GPX4, iron, and Tf levels gradually decreased, whereas ACSL4 levels increased, meanwhile with the decrease in eGFR levels, GPX4 and Tf levels gradually decreased, whereas ACSL4 levels increased. UAER were independently and positively correlated with ACSL4 [β = 17.53, 95% confidence interval (CI; 11.94, 23.13)] and negatively correlated with GPX4 [β = -1.633, 95% CI (-2.77, -0.496)] and Tf [β = -52.94, 95% CI (-95.78, -10.11)].The NO and MI groups were considered as reference groups, respectively. The severity of DN was negatively correlated with serum GPX4 [odds ratio (OR) = 0.925 and 0.902, p =0.015 and 0.001], and Tf (OR = 0.109 and 0.119, p =0.043 and 0.034), and positively correlated with ACSL4 (OR = 1.952 and 1.865, both p <0.001) in the MA group. DN severity was negatively correlated with serum GPX4 and Tf levels and positively correlated with serum ACSL4 levels in patients with T2DM.

Effects of black soldier fly larvae meal on production performance, meat quality, antioxidant capacity and serum biochemical indices of squabs

Abstract The aim of the study was to evaluate the effects of dietary black soldier fly larvae meal (BSFLM) on production performance, meat quality (including sensory quality, muscle fiber histological characteristics, chemical composition, and antioxidant capacity of muscle), and serum biochemical indices of 28-day-old squabs, to provide a good reference for the potential use of BSFLM as a functional feed supplement in pigeon production. A total of 192 1-day-old squabs and 96 pairs of 7-month-old breeding pigeons with the same egg production were stochastically divided into 4 groups with 6 paired replicates. Each pair of breeding pigeon with two squabs. The pigeons were fed the diets supplemented with 0 (control group), 0.5%, 1.0%, and 1.5% BSFLM, respectively. The experiment lasted for 28 days. Dietary BSFLM supplementation increased the growth performance, total antioxidant capacity (T-AOC), serum levels of glutathione peroxidase (GHS-PX), total superoxide dismutase (T-SOD), and glucose (GLU), and reduced the shear force, serum contents of triglyceride, cholesterol, low-density lipoprotein, and activities of alanine aminotransferase, aspartate aminotransferase and alkaline phosphatase. Moreover, it improved the meat color, muscle fiber histological characteristics, and fatty acids profile. However, no significant effects were observed on the slaughter performance, pH value, the water-loss, chemical composition, and amino acids profile. In conclusion, dietary BSFLM may improve the growth performance, meat quality, muscle antioxidant capacity, and health status of squabs. The best effects were observed for the 1.0% BSFLM diet.

Does myo-inositol supplementation influence oxidative stress biomarkers in patients with non-alcoholic fatty liver disease?

Myo-inositol (MI) is a carbocyclic sugar polyalcohol. MI has known to exert anti-inflammatory, anti-oxidant, and anti-diabetic activities. This study aimed to investigate the effects of MI supplementation on oxidative stress biomarkers in obese patients with non-alcoholic fatty liver disease (NAFLD). In this double-blinded placebo-controlled randomized clinical trial, 51 newly diagnosed obese patients with NAFLD were randomly assigned to receive either MI (4 g/day) or placebo supplements accompanied by dietary recommendations for 8 weeks. Oxidative stress biomarkers, nutritional status, as well as liver enzymes and obesity indices were assessed pre- and post-intervention. A total of 48 patients completed the trial. Although anthropometric measures and obesity indices decreased significantly in both groups, the between-group differences adjusted for confounders were non-significant for these parameters, except for weight (p = .049); greater decrease was observed in the MI group. Iron and zinc intakes decreased significantly in both groups; however, between-group differences were non-significant at the end of the study. No significant between-group differences were revealed for other antioxidant micronutrients at the study endpoint. Sense of hunger, feeling to eat, desire to eat sweet and fatty foods reduced significantly in both groups (p < .05), while the feeling of satiety increased significantly in the placebo group (p = .002). No significant between-group differences were observed for these parameters, except for desire to eat fatty foods; a greater decrease was observed in the MI group (p = .034). Serum levels of glutathione peroxidase (GPx) and superoxide dismutase (SOD) significantly increased in both study groups (p < .05); however, the between-group differences were non-significant at the end of the study. Furthermore, the between-group differences were non-significant for other oxidative stress biomarkers, except for serum nitric oxide (NO) level; a greater decrease was observed in the MI group. MI supplementation could significantly improve weight, desire to eat fatty foods, serum levels of NO, as well as the aspartate aminotransferase (AST)/ALT ratio.

Quercetin ameliorates ferroptosis of rat cardiomyocytes viaactivation of the SIRT1/p53/SLC7A11 signalingpathway to alleviate sepsis‑induced cardiomyopathy.

Sepsis‑induced cardiomyopathy (SIC) is a manifestation of multiple organ failure as a result of sepsis and is a serious threat to life. Here, the effect and mechanisms of quercetin (QUE) in SIC were assessed. It was found that patients with SIC expressed lower serum levels of glutathione peroxidase 4 (GPX4) and SIRT1 but higher levels of CK‑MB, cTnI, TNF‑α, and IL‑6 compared with healthy individuals. A dose of 80µM QUE increased the viability and reduced the ferroptosis of H9C2 cells treated with 1.0µg/ml LPS invitro. The administration of QUE decreased the levels of MDA, NADPH, lipid peroxidation and cytoplasmic cytochrome C and upregulated the levels of GSH and TOM 20, thus exerting an anti‑oxidative effect via mediating SIRT1 expression. It also activated the SIRT1/p53/SLC7A11 signaling pathway to reduce cellular Fe2+ and PTGS2 levels, decreased cell apoptosis rate, and upregulated the levels of GPX4 and ferritin to inhibit ferroptosis of H9C2 cells invitro. Injection of QUE into rats activated the SIRT1/p53/SLC7A11 signaling pathway, reduced the levels of CK‑MB, cTnI, inflammatory cell infiltration, MDA, NADPH, cytoplasmic cytochrome C, cellular Fe2+, and PTGS2 but upregulated the levels of GSH, TOM 20, GPX4, and ferritin to alleviate SIC in a dose‑dependent manner invivo. To conclude, QUE exerted an anti‑ferroptotic effect via activation of the SIRT1/p53/SLC7A11 signaling pathway to dampen SIC both invivo and invitro. These findings highlighted a potential therapeutic strategy for the management of SIC.

Ferroptosis involves in Schwann cell death in diabetic peripheral neuropathy.

Accumulating evidence shows that Schwann cells' (SCs) death caused by high glucose (HG) is involved in the pathological process of diabetic peripheral neuropathy (DPN). Ferroptosis is a novel form of regulatory cell death driven by iron-dependent lipid peroxidation. However, it is not clear whether ferroptosis is involved in the death process of SCs induced by HG. The expression of ferroptosis-related indicators in the serum of DPN patients was detected by ELISA. Subsequently, using cell counting kit‑8, western blot, real-time PCR, and Ki-67 staining, we investigated the effects of HG on the ferroptosis of SCs and initially explored the underlying mechanism. The results showed that the serum levels of glutathione peroxidase 4 (GPX4) and glutathione in patients with DPN decreased, while malondialdehyde levels increased significantly. Then, we observed that erastin and HG induced ferroptosis in SCs, resulting in the decrease in cell activity and the expression level of GPX4 and SLC7A11, which could be effectively reversed by the ferroptosis inhibitor Fer-1. Mechanistically, HG induced ferroptosis in SCs by inhibiting the NRF2 signaling pathway. Our results showed that ferroptosis was involved in the death process of SCs induced by HG. Inhibition of ferroptosis in SCs might create a new avenue for the treatment of DPN.

The role of resistance training and creatine supplementation on oxidative stress, antioxidant defense, muscle strength, and quality of life in older adults.

The aim of this study was to evaluate the effect of resistance training (RT) with creatine monohydrate supplementation (CS) on serum levels of 8-hydroxydeoxyguanosine (8-OHdG), malondialdehyde (MDA), glutathione peroxidase (GPX), and total antioxidant capacity (TAC) in older adults. This study evaluated the effect of resistance training with creatine monohydrate supplementation on oxidative stress and antioxidant defense, muscle strength and quality of life in older adults. We examined 45 non-athlete volunteer older men and women (mean, 68.1 ± 7.2 years old), were randomly selected and divided into three groups of 15: RT with creatine supplementation (RT + CS), RT with placebo (RT + P) and control group. RT protocol was performed for 10 weeks, three sessions per week. Creatine supplement was taken daily at a dose of 0.1 g/kg of body weight, while the placebo group consumed the same amount of starch. Fasting blood samples were taken before the start of program and at the end of the RT period. In the training groups, after 10 weeks of RT, a significant decrease in MDA and 8 - OHDG as well as a significant increase in serum levels of GPX and TAC were observed (in all cases, p = 0.001). In addition, creatinine levels were enhanced in the RT + CS (p = 0.014). Training intervention also improved quality of life and muscle strength in the experimental groups (p = 0.001), although muscle strength changes were more visible in the RT + CS group than in the RT + P group (p < 0/05). Regular resistance training can be recommended as a very suitable non-pharmacological approach to strengthen the body's antioxidant system, muscle strength and quality of life in older adults. There are no definite findings on the role of creatine on the antioxidant system and quality of life in older adults, but the use of this supplement in addition to RT can double the amount of strength gained from resistance training.

Meta-analysis of hydroxycinnamic acids into finishing lambs’ diet: Growth performance, antioxidant status, and meat quality

The objective of this study was to evaluate the effects of dietary supplementation with hydroxycinnamic acids (HAs) on productive performance, antioxidant status in blood serum, and meat quality of finishing lambs using meta-analytic methods. Based on the selection criteria, 14 peer-reviewed publications were included in the final database. The weighted mean difference (WMD) between the experimental treatments (diets added with HAs) and the control treatments (diets without HAs) was evaluated using the random effects meta-analysis model. HAs supplementation had positive effects on daily weight gain (WMD = 13.46 g/d; P < 0.001), dry matter intake (WMD = 19.54 g/d; P = 0.040), and feed conversion rate (WMD = −0.249 kg/kg; P = 0.001). In addition, HAs supplementation decreased serum levels of malondialdehyde (WMD = −0.64 nmol/mL; P < 0.001) and increased (P < 0.001) serum levels of glutathione peroxidase (WMD = 1.25 ng/mL), superoxide dismutase (WMD = 41.34 pg/mL), catalase (WMD = 149.71 pg/mL) and total antioxidant capacity (WMD = 0.973 U/mL). In meat, HAs supplementation decreased the MDA content (WMD = 0.427 mg/kg; P = 0.043); however, it did not affect the pH, shear force, or meat color (P > 0.05). In conclusion, HAs supplementation improves the productive performance and antioxidant status of finishing lambs without affecting meat quality.

Serum Glutathione Peroxidase and Superoxide Dismutase Levels in Young Adult Active Smokers and Non-Smokers in a Southwest Based Tertiary Institution

Cigarette smoking is still a major public health issue, as it is the primary cause of various preventable diseases and premature deaths around the world. Previous studies have shown that tobacco components aggravate respiratory burst thus increasing the generation of reactive oxygen species (ROS). This case-control study is to examine glutathione peroxidase and superoxide dismutase levels among young adult active and non-active cigarette smokers at a tertiary institution in South West, Nigeria. This descriptive comparative study was carried out to compare the levels of serum glutathione peroxidase by Paglia and Valentine method and Nebot method of superoxide dismutase estimation in young adult active smokers and non-smokers in Ogun state based tertiary institution, between February and June, 2021. There was a significantly higher level (p = 0.000) of glutathione peroxidase in the case (55.39 ± 2.87) compared to the control (42.59 ± 2.41). There was no significant difference in the level of the measured antioxidants at different categories of years of smoking among the group of smokers. There was no significant difference in the level of the measured antioxidants at different quantities of cigarettes smoked by the participants. This study revealed that there was no significant difference in the level of the measured antioxidants at different categories of years amd quantity of cigarette smoked among the group of smakers. Prolonged exposure and quantity of cigarette smooke by smokers did not cause depletion of antioxidants among active smokers. However, smoking was associated with a higher level of oxidative stress marker.

Effects of rosemary extract supplementation in feed on growth performance, meat quality, serum biochemistry, antioxidant capacity, and immune function of meat ducks

This study aimed to investigate the effects of diets supplemented with different levels of rosemary extract (RE) on the growth performance, meat quality, serum biochemistry, antioxidative capacity, and immunological capacity of Cherry Valley meat ducks. A total of 525 healthy Cherry Valley female meat ducks at 1 d of age were selected for this study. Ducks were randomly divided into 5 treatments with 7 replicates per treatment, and each replicate had 15 ducks. All replicates were randomly assigned to treatments. The study was designed as a dose response experiment. Treatment 1 (CON) was fed with the basal diet, and Treatment 2 to 5 (RE250, RE500, RE750, RE1000) were fed with the basal diet supplemented with 250, 500, 750, and 1,000 g/t RE, respectively. The whole experiment lasted 42 days with early stage (1-21 d) and late stage (22-42 d). Results showed that during 22 to 42 d, ducks that were fed over 500 g/t RE had significantly lower feed gain ratio than the ones in CON (P=0.006). In addition, ducks in RE750 had significantly lower L* and a* in leg muscle compared with the ones in CON (P < 0.05). Besides, ducks that were fed between 250 and 750 g/t RE had significantly lower total protein level in serum compared with the ones in CON (P=0.005). Ducks in RE250 and RE750 had significantly lower albumin, total cholesterol, high-density lipoprotein cholesterol, and low-density lipoprotein cholesterol levels in serum compared with the ones in CON and RE1000 (P < 0.05), and significant quadratic relationships were noticed between albumin, total cholesterol, high-density lipoprotein cholesterol, and low-density lipoprotein cholesterol and dietary RE level (P < 0.05). Moreover, ducks that were fed between 500 and 750 g/t RE had significantly higher levels of interleukin-2 in serum compared to the ones in CON and RE1000 (P=0.003). Ducks in RE250 and RE750 had significantly higher levels of immunoglobulin G in serum compared to the ones in CON and RE1000 (P < 0.001). Ducks that were fed over 500 g/t RE had significantly higher levels of immunoglobulin A in serum compared to the ones in CON (P=0.001). Finally, ducks that were fed between 500 and 750 g/t RE had significantly higher serum levels of glutathione peroxidase, superoxide dismutase, catalase, and total antioxidant capacity (P < 0.05) compared to the ones in CON. Ducks that were fed over 250 g/t RE had significantly lower serum level of malondialdehyde compared to the ones in CON (P=0.020). Collectively, dietary supplementation of RE improved the growth performance and meat qualities of meat ducks during 22 to 42 d, which were possibly associated with the antioxidative and anti-inflammatory effects of RE. Based on the serum antioxidative and immunological parameters, we suggested that 500 to 750 g/t was the optimal supplementation rate for RE in diets for meat ducks aged 22 to 42 d.

Blood Selenium and Serum Glutathione Peroxidase Levels Were Associated with Serum β-Amyloid in Older Adults.

Studies have established the association between blood β-amyloid (Aβ) levels and Alzheimer's disease, but population-based studies concerning the association between selenium (Se) and Aβ levels in blood samples are very limited. Therefore, we explored the association in an elderly population with Se status and serum Aβ measures. A cross-sectional study on 469 elderly individuals from four rural counties with diverse soil Se levels was carried out. Fasting blood Se, serum selenoprotein P (SELENOP), and glutathione peroxidase (GPX), serum Aβ42, and Aβ40 were measured. Quantile regression models were used to determine the associations of blood Se, serum GPX, and SELENOP with Aβ levels. Significant negative associations were observed between blood Se and serum Aβ42 and Aβ40 levels at all percentiles (P < 0.05). The associations were generally stronger at higher Aβ42 and Aβ40 percentiles than lower Aβ42 and Aβ40 percentiles. Blood Se was positively associated with serum Aβ42/Aβ40 ratio at 25th, 50th, and 75th percentiles. Significant positive associations were observed between serum GPX and Aβ42 and Aβ40 levels at all percentiles (P < 0.05). The positive associations were generally stronger at higher Aβ42 and Aβ40 percentiles than at lower percentiles. Serum GPX was negatively associated with Aβ42/Aβ40 ratio at 25th, 50th, 75th, and 95th percentiles. No associations with serum SELENOP and Aβ levels were observed. Our results suggest that higher Se levels are associated with lower serum Aβ42 and Aβ40 levels and with higher Aβ42/Aβ40 ratio, and the results are specific for different selenoproteins.

Rumen fermentative metabolomic and blood insights into the effect of yeast culture supplement on growing bulls under heat stress conditions.

This study was conducted to investigate the effects of yeast culture supplements on the physiological state and growth performance of growing bulls under heat stress conditions and the underlying mechanism. A total of 14 (6.0 ± 1.0 months old) growing bulls with similar body weight were randomly assigned into the control group (YC0g/d) and yeast culture supplement group (YC40g/d). YC0g/d contained three replicates, with two bulls in each replicate, which were fed a basal diet. Meanwhile, the YC40g/d treatment contained four replicates, with two bulls in each replicate, which were fed a basal diet supplemented with 40 g/day of yeast culture per cattle. Growth performance, nutrient digestibility, rumen fermentable metabolites, serum immunity, serum hormones, and serum antioxidant parameters were measured. Results showed that the average daily gain significantly increased (P < 0.05), while the feed-to-gain ratio significantly decreased (P < 0.01) after YC supplementation compared with the YC0g/d. The digestibility of neutral detergent fiber (P < 0.05) was higher in YC40g/d. There were no significant differences in ruminal pH, NH3-N, butyrate, or acetate/propionate (P > 0.05). Besides, the rumen MCP, acetate, propionate, and total VFA content remarkably increased with the supplement of YC (P < 0.05). Yeast culture supplementation increased the concentration of nicotinamide riboside, neuromedin B, peptides, and formyl-5-hydroxykynurenamine. The YC40g/d group had a significantly (P < 0.05) higher serum triiodothyronine level, serum glutathione peroxidase levels, and total antioxidant capacity while having a lower serum malondialdehyde level than the YC0g/d group. In conclusion, the addition of yeast culture in the diet improves the growth performance of growing bulls under heat stress by increasing nutrient digestibility, rumen fermentation function, antioxidant capacity, and rumen metabolites.

Randomized Double-blind Clinical Trial Examining the High Intensity Interval Training and Ellagic Acid Effects on Antioxidant, and Oxidative Stress Factors in 0bese Women

Background and Objectives Obesity is one of the most important concerns and problems that threaten health all over the world, and sports activity and healthy diet are the most important ways to treat and prevent it. so, this study aims to evaluate the effect of 12 weeks of high-intensity interval training (HIIT) and Ellagic Acid (EA) supplementation on oxidative/antioxidant markers in obese women. Subjects and Methods In this randomized clinical trial, 56 inactive obese women were randomly divided into four groups of HIIT, EA, EA+HIIT, and Control. The HIIT groups performed the training for 12 weeks including four 4-minute interval running at 85-95% HRpeak, 3 minutes of running at 50-60% HRpeak and 7 minutes of rest interval. EA supplement was administered at a dose of 50 mg/day for 12 weeks. Blood samples were collected from the subjects before and 48 hours after the last session to assess serum levels of glutathione peroxidase (GPx), Malondialdehyde (MDA), and total antioxidant capacity (TAC). Results There was a significant difference between EA+HIIT and HIIT groups in MDA (P=0.005), TAC (P=0.003) and GPx (P=0.0001) after intervention. There was a significant difference between the MDA and TAC values of the subjects in the studied groups after 12 weeks of HIIT with EA supplementation (P=0.0001). And this was the difference between the combined group (EA+HIIT) and other groups. Conclusion Twelve weeks of HIIT and EA supplementation can significantly improve antioxidant and oxidant factors in obese women.

Comparative Effect of Bergamot Polyphenolic Fraction and Red Yeast Rice Extract in Rats Fed a Hyperlipidemic Diet: Role of Antioxidant Properties and PCSK9 Expression.

Elevated serum cholesterol levels, either associated or not with increased triglycerides, represent a risk of developing vascular injury, mostly leading to atherothrombosis-related diseases including myocardial infarction and stroke. Natural products have been investigated in the last few decades as they are seen to offer an alternative solution to counteract cardiometabolic risk, due to the occurrence of side effects with the use of statins, the leading drugs for treating hyperlipidemias. Red yeast rice (RYR), a monacolin K-rich natural extract, has been found to be effective in counteracting high cholesterol, being its use accompanied by consistent warnings by regulatory authorities based on the potential detrimental responses accompanying its statin-like chemical charcateristics. Here we compared the effects of RYR with those produced by bergamot polyphenolic fraction (BPF), a well-known natural extract proven to be effective in lowering both serum cholesterol and triglycerides in animals fed a hyperlipidemic diet. In particular, BPF at doses of 10 mg/Kg given orally for 30 consecutive days, counteracted the elevation of both serum LDL cholesterol (LDL-C) and triglycerides induced by the hyperlipidemic diet, an effect which was accompanied by significant reductions of malondialdehyde (MDA) and glutathione peroxidase serum levels, two biomarkers of oxidative stress. Furthermore, the activity of BPF was associated to increased HDL cholesterol (HDL-C) levels and to strong reduction of Proprotein convertase subtilisin/kexin type 9 (PCSK9) levels which were found increased in hyperlipidemic rats. In contrast, RYR at doses of 1 and 3 mg/Kg, produced only significant reduction of LDL-C with very poor effects on triglycerides, HDL-C, glutathione peroxidase, MDA and PCSK9 expression. This indicates that while BPF and RYR both produce serum cholesterol-lowering benefits, BPF produces additional effects on triglycerides and HDL cholesterol compared to RYR at the doses used throughout the study. These additional effects of BPF appear to be related to the reduction of PCSK9 expression and to the antioxidant properties of this extract compared to RYR, thereby suggesting a more complete protection from cardiometabolic risk.

Chloroquine Induced Oxidative Stress in Male Albino Mice: RCT

Many drugs have been found to induce oxidative stress. Oxidative stress is responsible for a large number of diseases. Chloroquine is one of the drugs, which can induce oxidative stress, when it is given at higher dose. Purpose: To find the effect of chloroquine as stress inducer on albino mice. Study Design: Randomized clinical trial. Methodology: Sixty male albino mice were taken into this randomized controlled study. Those were divided into two groups of 30 each. Group A was the control group while group B mice were given single oral dose of 970 mg/kg of body weight of chloroquine on 9th day of experiment. Terminal intracardiac blood sample was obtained on 17th day of experiment. Statistical analysis: SPSS version 23 was used for data analysis. Results: When results of group B were compared with those of group A, there was highly significant (p= 0.000) rise in serum malondialdehyde level and highly significant (p= 0.000) decrease in serum glutathione peroxidase level. Conclusion: It was concluded that Chloroquine induces oxidative stress when it is given at the dose of 970 mg/kg of body weight in mice. Keywords: Chloroquine, Oxidative Stress and Malondialdehyde.

Nicotine and modafinil combination protects against the neurotoxicity induced by 3,4-Methylenedioxymethamphetamine in hippocampal neurons of male rats

MDMA (3,4-Methylenedioxymethamphetamine) is a common recreational drug of abuse which causes neurodegeneration. Nicotine and modafinil provide antioxidant and neuroprotective properties and may be beneficial in the management of MDMA-induced neurotoxicity. The purpose of this study was to characterize how acute and chronic administration of nicotine and/or modafinil exert protective effects against the MDMA-induced impaired cognitive performance, oxidative stress, and neuronal loss. Adult male rats were divided into three groups, namely control, MDMA and treatment (modafinil and/or nicotine). MDMA (10 mg/kg) was administered intraperitoneally during a three-week schedule (two times/day for two consecutive days/week). The treated-groups were classified based on the acute or chronic status of treatment. In the groups which underwent acute treatments, nicotine (0.5 mg/kg) and/or modafinil (100 mg/kg) were injected just prior to the MDMA administration (acute nicotine (NA), acute modafinil (MA), and acute nicotine and modafinil (NMA)). In the rats which received chronic treatments, nicotine (0.5 mg/kg) and/or modafinil (100 mg/kg) were injected every day during the three week-schedule administration of MDMA (chronic nicotine (NC), chronic modafinil (MC), and chronic nicotine and modafinil (NMC)). Learning and memory performance, as well as avoidance response, were assessed by Morris water maze and Shuttle box, respectively. Our findings indicate enhanced learning and memory and avoidance response in the NMC group. By TUNEL test and Cresyl Violet staining we evaluated neuronal loss and apoptosis in the hippocampal CA1 and found increased neuronal viability in the NMC group. On the other hand, chronic administration of modafinil and nicotine significantly down-regulated the caspase 3 and up-regulated both BDNF and TrkB levels in the MDMA-received rats. The serum levels of glutathione peroxidase (GPx) and total antioxidant capacity (TAC) were evaluated and we found that the alterations of serum levels of GPx and TAC were considerably prevented in the NMC group. The overall results indicate that nicotine and modafinil co-administration rescued brain from MDMA-induced neurotoxicity. We suggest that nicotine and modafinil combination therapy could be considered as a possible treatment to reduce the neurological disorders induced by MDMA.

Exercise reduces hyperlipidemia-induced kidney damage in apolipoprotein E-deficient mice.

Hyperlipidemia is a risk factor of kidney damage that can lead to chronic kidney disease. Studies have shown that exercise reduces kidney damage; however, the specific mechanisms underlying the protective effects of exercise remain unclear. For 12 weeks, 8-week-old male apolipoprotein E-deficient (ApoE-/-) mice were randomly divided into four treatment groups (n=7/group) as follows: Mice fed a normal diet (ND group); mice fed a ND and exercised (ND + E group); mice fed a high-fat diet (HD group); and mice fed a HD and exercised (HD + E group). Exercise training consisted of swimming for 40 min, 5 days/week. Metabolic parameters, such as low-density lipoprotein-cholesterol, total cholesterol and creatinine levels were higher in the ApoE-/- HD mice compared with those in the ApoE-/- HD + E mice. Serum levels of glutathione peroxidase and superoxide dismutase were significantly decreased in the HD group compared with those in the HD + E group. Significant pathological changes were observed in the HD + E group compared with in the HD group. Immunohistochemistry and immunoblotting revealed increased levels of oxidative stress (nuclear factor erythroid-2-related factor 2) and fibrosis (Smad3 and TGF-β) markers in the ApoE-/- HD group; however, the expression levels of these markers were significantly decreased in the ApoE-/- HD + E group. Furthermore, NF-κB expression in the HD + E group was significantly lower compared with that in the HD group. These results suggested that exercise may exert protective effects against kidney damage caused by hyperlipidemia.