Superoxide Dismutase Content Research Articles

Comprehensive analysis of butyric acid impact on immunology, histopathology, gene expression, and metabolomic responses in pacific shrimp experiencing cold stress

In this study, our objective was to investigate the impact of dietary butyric acid (BA) on the homeostasis mechanism of Pacific shrimp under cold stress. Specifically, we analyzed its effects on immunity, antioxidant capacity, gene expression, and metabolomics response. To carry out this research, Litopenaeus vannamei were fed a diet supplemented with BA for 8 weeks. Following this feeding period, a total of 180 shrimp, with an average weight of 12.76 ± 0.38 g, were exposed to cold conditions, with the temperature decreasing from 28 °C to 14 °C within an hour. The results of our study revealed survival rates ranging from 90 % to 100 %. Shrimp that were fed a diet containing 1.5 % BA exhibited a significant increase in acid phosphatase (ACP) and alkaline phosphatase (AKP) activity. Conversely, the control groups showed an increase in aspartate aminotransferase (AST) and alanine transaminase (ALT) activity. Shrimp that consumed diets containing 1.5 % BA displayed the lowest malondialdehyde (MDA) levels with the highest superoxide dismutase (SOD) content. The shrimp fed the BA diet exhibited tightly organized hepatic tubules with a star-shaped lumen filled with numerous B and R cells. Furthermore, shrimp fed the BA diet demonstrated a significant increase in caspase 3 (CASP) expression. There were no significant variations in the expression levels of prophenoloxidase (ProPO), manganese superoxide dismutase (MnSOD), and glutathione S-transferase (GST) The metabolites of Dl-carnitine, acetyl-l-carnitine, propionylcarnitine, hexanoylcarnitine, palmitoylcarnitine, decanoylcarnitine, and Dl-carnitine exhibited significantly increased expression in shrimp that were fed BA, suggesting their role in the lipolysis process. Based on the findings, adding 2 % BA to the diet of Pacific shrimp helps reduce inflammation and oxidative stress when they are under cold stress.

Croton grewioides essential oil and anethole reduce oxidative stress and improve growth of bovine primordial follicles during culture of ovarian tissue.

This study aims to evaluate the effects of Croton grewioides essential oil (CGEO) and anethole on follicle survival, growth, and oxidative stress in cultured bovine ovarian tissues. Ovarian tissues were cultured for 6 days in a medium supplemented with different concentrations (1, 10, 100, or 1000 µg mL-1) of CGEO or anethole and then, follicular survival and growth, collagen content, and stromal cell density in ovarian tissues cultured in vitro were evaluated by histology. The mRNA levels of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase 1 (GPX1), peroxirredoxin 6 (PRDX6), and nuclear factor erythroid 2-related factor 2 (NRF2) were evaluated by real-time PCR. The activity of SOD, CAT, glutathione peroxidase (GPx), and thiol concentrations were investigated. Ovarian tissues cultured with 1 µg mL-1 CGEO or anethole had a higher percentage of healthy follicles than those cultured in a control medium (P < .05). The 1 µg mL-1 CGEO also increased the number of stromal cells, collagen fibers, and thiol levels. Anethole (1 µg mL-1) increased CAT activity and reduced that of GPx. The activity of SOD was reduced by CGEO. In contrast, 1 µg mL-1 anethole reduced mRNA for CAT, PRDX1, and NRF2 (P < .05). In addition, 1 µg mL-1 CGEO reduced mRNA for CAT, PRDX6, and GPx1 (P < .05). The presence of 1 µg mL-1 anethole or CGEO in a culture medium promotes follicle survival and regulates oxidative stress and the expression of mRNA and activity of antioxidant enzymes in cultured bovine ovarian tissues.

Growth performance, antioxidant status, intestinal morphology, and body composition of Nile tilapia (Oreochromis niloticus) supplemented with essential oils: A meta-analysis

This study aimed to evaluate the effects of dietary supplementation with essential oils (EOS) on growth performance, antioxidant status in blood serum, intestinal morphology, and whole-body composition of Nile tilapia (Oreochromis niloticus) through a meta-analytic approach. The search and collection of scientific articles were conducted using the PRISMA methodology, and 45 full-text scientific articles were obtained. The data used in the meta-analysis were extracted from these 45 documents. The effect size was assessed through weighted mean differences (WMD) using Der-Simonian and Laird random effects models. Dietary supplementation with EOS increased (P < 0.001) final weight, body weight gain, specific growth rate, feed intake, protein efficiency ratio, and survival but decreased (P < 0.001) feed conversion ratio. In blood serum, EOS supplementation decreased (P < 0.001) the concentration of malondialdehyde and increased (P < 0.001) the concentration of catalase, superoxide dismutase, and glutathione peroxidase. In the foregut, midgut, and hindgut, greater (P < 0.01) villus height, villus width, and number of goblet cells were observed in response to EOS supplementation. EOS supplementation increased (P < 0.01) crude protein content and decreased (P < 0.05) crude lipid content in the whole-body. In conclusion, essential oils can be used as a dietary additive to improve growth performance, antioxidant status in blood serum, and intestinal morphology in Nile tilapia. Likewise, supplementation with essential oils increases the protein content and decreases the fat content in the whole-body of Nile tilapia.

P-082 Use of TetraSOD® in male infertility: double-blind randomized placebo-controlled study

Abstract Study question Can the use of TetraSOD® (microalgae with high content of the antioxidant enzyme superoxide dismutase) improve semen quality and reduce oxidative stress in sperm? Summary answer The use of TetraSOD® reduces the oxidative stress of sperm, increasing the total sperm count in oligozoospermia and reducing the double-stranded DNA sperm fragmentation. What is known already Male factor is present in approximately 50% of the infertile couples, a large number of them of unknown or idiopathic origin. It has been demonstrated that semen quality is deteriorating over time, perhaps as a result of exposure to several environmental factors related with lifestyle that could impact both directly and indirectly on the complex process of spermatogenesis. Some of these bad habits of lifestyle increase the levels of oxidative stress in semen, which is associated with lower sperm concentration and motility. In this scenario, the use of antioxidants can be useful to increase sperm quality. Study design, size, duration Double-blind randomized placebo-controlled clinical study to assess the effect of 250 mg of TetraSOD® (microalgae with high content of the primary antioxidant enzyme superoxide dismutase). Eighty patients with idiopathic infertility showing asthenozoospermia, oligozoospermia or oligoasthenozoospermia were recruited and randomized to receive 250 mg of TetraSOD® (TSOD group) or placebo (Placebo group) for 3 months. Participants/materials, setting, methods Men with asthenozoospermia, oligozoospemia or aligoastenozoospermia and idiopatic infertility were recruited after informed consent signature. Patients were randomized into two groups. TetraSOD® group received 250 mg of TetraSOD®during 3 months, and Placebo group received capsules without TetraSOD® during the same period of time. Seminogram, double-strand sperm DNA fragmentation (COMET assay) and sORP (static oxidation- reduction potential) were studied at baseline (V0) and after 3 months (V3). Main results and the role of chance TetraSOD® consumption for three months elicited a statistically significant increase (Wilcoxon matched-pairs signed rank test; p=0.02) in the average number of sperms per ejaculate (from 17.06 x 106 to 41.94 x 106) in participants displaying oligozoospermia (&amp;lt;39 x 106 sperms) at V0. In contrast, the lower variation in the measured values in the Placebo group was not statistically significant. Regarding sORP, a statistically significant decrease (Wilcoxon matched-pairs signed rank test; p=0.0233) was observed in participants who displayed a value at V0 between 1.34-10. After TetraSOD® consumption, the average changed from 2.96 to 1.91 mv/106 sperm/ml from V0 to V3. However, not statistically significant changes were detected in the Placebo group between sORP values at V0 and V3. Moreover, in relation to double-stranded DNA breaks, a statistically significant decrease (Wilcoxon matched-pairs signed rank test; p=0.01) in the average percentages (from 31.81% to 25.93%) was measured after consumption of TetraSOD® at V3 in participants displaying a compromised redox status (sORP&amp;gt;1.34-10) at V0. No significant changes were found in the Placebo group. Limitations, reasons for caution The study was performed only in one ethnic group, so in future studies other ethnicities should be included. Wider implications of the findings TetraSOD® may improve male fertility because increases the number of sperms per ejaculate in oligozoospermia and reduces double-stranded DNA fragmentation in sperm when individuals display an altered redox status in semen. Such results might be related to the indirect antioxidant effect of TetraSOD®, reducing oxidative stress in seminal fluid. Trial registration number Not applicable

Baicalin protects against hepatocyte injury caused by aflatoxin B1 via the TP53-related ferroptosis Pathway

ObjectiveBaicalin has antioxidative, antiviral, and anti-inflammatory properties. However, its ability to alleviate oxidative stress (OS) and DNA damage in liver cells exposed to aflatoxin B1 (AFB1), a highly hepatotoxic compound, remains uncertain. In this study, the protective effects of baicalin on AFB1-induced hepatocyte injury and the mechanisms underlying those effects were investigated. MethodsStable cell lines expressing CYP3A4 were established using lentiviral vectors to assess oxidative stress levels by conducting assays to determine the content of reactive oxygen species (ROS), malondialdehyde (MDA), and superoxide dismutase (SOD). Additionally, DNA damage was evaluated by 8-hydroxy-2-deoxyguanosine (8-OHdG) and comet assays. Transcriptome sequencing, molecular docking, and in vitro experiments were conducted to determine the mechanisms underlying the effects of baicalin on AFB1-induced hepatocyte injury. In vivo, a rat model of hepatocyte injury induced by AFB1 was used to evaluate the effects of baicalin. ResultsIn vitro, baicalin significantly attenuated AFB1-induced injury caused due to OS, as determined by a decrease in ROS, MDA, and SOD levels. Baicalin also considerably decreased AFB1-induced DNA damage in hepatocytes. This protective effect of baicalin was found to be closely associated with the TP53-mediated ferroptosis pathway. To elaborate, baicalin physically interacts with P53, leading to the suppression of the expression of GPX4 and SLC7A11, which in turn inhibits ferroptosis. In vivo findings showed that baicalin decreased DNA damage and ferroptosis in AFB1-treated rat liver tissues, as determined by a decrease in the expression of γ-H2AX and an increase in GPX4 and SLC7A11 levels. Overexpression of TP53 weakened the protective effects of baicalin. ConclusionsBaicalin can alleviate AFB1-induced OS and DNA damage in liver cells via the TP53-mediated ferroptosis pathway. In this study, a theoretical foundation was established for the use of baicalin in protecting the liver from the toxic effects of AFB1.

Differential responses of the phyllosphere abundant and rare microbes of Eucommia ulmoides to phytohormones

Phyllosphere microbiota play a crucial role in plant productivity and adaptation, and the abundant and rare microbial taxa often possess distinct characteristics and ecological functions. However, it is unclear whether the different subcommunities of phyllosphere microbiota respond variably to the factors that influence their formation, which limits the understanding of community assembly. The effects of two phytohormones, namely, indole-3-acetic acid (IAA) and N6-(delta 2-isopentenyl)-adenine (IP), on the phyllosphere microbial subcommunities of Eucommia ulmoides were investigated using potted experiments. The results demonstrated that the phytohormones induced significant variations in the composition, diversity, and function of the abundant microbial subcommunity in the phyllosphere of E. ulmoides, however, their effects on the rare subcommunity were negligible, and their effects on the moderate subcommunity were between those of the abundant and rare taxa. The phytohormones also induced significant alterations in the phenotypic and physiological properties of E. ulmoides, which indirectly affected the phyllosphere microbial community. Leaf thickness and average leaf area were the main phenotypic variables that affected the composition of the phyllosphere microbial community. The total alkaloid content and activity of superoxide dismutase (SOD) were the main physiological variables that affected the composition of the phyllosphere microbial community. The phenotypic and physiological indices of E. ulmoides explained the variations in the phyllosphere microbial subcommunities in descending order: abundant > moderate > rare taxa. These variables explained a significant proportion of the variations in the abundant taxa, and an insignificant proportion of the variations in the rare taxa. This study improves our understanding of the assembly of the phyllosphere microbiota, which provides important theoretical knowledge for future sustainable agriculture and forestry management based on the precise regulation of phyllosphere microbiota.

Assessment of Combined Effects of Selenium and Cadmium on Antioxidant Activity of Enzymes Produced by Citrobacter freundii

Study’s Novelty/Excerpt This study is novel in demonstrating the differential effects of cadmium (Cd) and selenium (Se) on Citrobacter freundii, specifically highlighting the mitigation of Cd toxicity by Se addition. The research reveals that while Cd concentrations above 40 ppm hinder bacterial growth and significantly reduce protein content, Se addition alleviates these detrimental effects, reducing the protein content decline and antioxidant enzyme activities. This work provides new insights into the interplay between heavy metal toxicity and antioxidant defenses in bacteria, suggesting potential biotechnological applications for managing Cd contamination. Full Abstract In this study, Citrobacter freundii (NRRL B-2643) bacteria were cultured in an LB medium with different cadmium (Cd) concentrations. To mitigate the deleterious impact of Cd, varying quantities of selenium (Se), renowned for its antioxidative power, were added to the cadmium-containing growth medium. Bacterial concentration, soluble protein, and activities of antioxidant enzymes (Glutathione peroxidase (GSH-Px), Glutathione reductase (GSH-Red), Superoxide dismutase (SOD), and Catalase (CAT) were determined by spectrophotometer. No significant microorganism growth was observed at 150 ppm and higher Cd concentrations. However, the bacterial growth was not affected up to 40 ppm Cd concentration. Bacteria were grown in media containing 0, 75, 100, and 125 ppm Cd, where the 0-ppm cadmium group served as control. The protein content of the microorganism grown in the medium containing 75, 100, and 125 ppm Cd decreased about 21, 40, and 62 percent, respectively, compared to the control. When 3.0 ppm selenium was added to the same growth medium, the percentage decrease in protein amount compared to the control was 12, 25, and 50, respectively. Compared to the control, an increase in the antioxidant enzyme activities in bacteria grown in cadmium-containing media was observed (p&lt;0.05). With the addition of 1.0 and 3.0 ppm selenium to cadmium-containing media, a decrease was observed in the activities of antioxidant enzymes.

Molecular and physiological insights of salt tolerance in hulled barley (Hordeum vulgare L. var. nudum)

Background The nutritional value of hulled barley makes it a promising resource for creating new healthy foods globally. However, improving the salt tolerance of certain barley cultivars remains a challenge, despite their inherent salt tolerance. Objective This study aims to investigate the physiological and molecular mechanisms associated with salt tolerance in barley, focusing on the expression of genes involved in regulating cellular ion homeostasis, detoxification, and water transport. Materials and methods Three barley cultivars were subjected to different levels of NaCl concentrations. Data on several growth parameters and gene expression were measured and recorded. Results and conclusion Increasing salinity affected shoot and root length, fresh and dry weight, depending on genotype. Giza-130 showed higher dry weight, followed by Giza-135, while Giza-136 showed the lowest value. Giza-130 exhibits the ability to regulate intracellular ion concentration through a higher expression level of the NHX1- gene, demonstrating its ability to effectively absorb water under salinity stress, due to its high expression level of the hvpip −aquaporin gene and effectively remove reactive oxygen species and reduces oxidative stress through the accumulation of higher concentrations of catalase, ascorbate peroxidase, glutathione S-transferase, and superoxide dismutase. In contrast, Giza-136 showed down-regulated gene expression and higher sensitivity to salt stress. Giza-130 was salt tolerant, followed by Giza-135 while Giza-136 was very sensitive. The genotype-specific regulation of gene expression not only highlights the important role of these genes in protecting plants against salt-induced oxidative stress but also improves our understanding of the salt stress tolerance of barley and plays an important role in improving salt tolerance in other crops.

A comparative study between curcumin and curcumin nanoparticles on reproductive performance and antioxidant system of aged roosters

Increased lipid peroxidation and decreased antioxidant status can result in reduced reproductive activity and fertility in aged male broiler breeders. This study was conducted to evaluate the effects of curcumin supplements (natural or nanoparticles) on the sperm characteristics, antioxidant system, fertility, and hatchability of aged roosters (54-64 wk), and to estimate the relative bioavailability value (RBV) of nano-curcumin on the measured parameters including the hypo-osmotic swelling test (HOST), motility, viability, sperm count, volume, the concentration of testosterone, glutathione peroxidase (GPx), and superoxide dismutase (SOD), diameter of the spermatogenic tube (DST), epithelium thickness (EpiTh), spermatogonia count (SPcount), fertility, hatchability, and relative weight of testis (RW-testis). A total of 30 roosters were individually caged and randomly assigned to 5 treatments comprising control (without curcumin as the basal diet), basal diet + 15 mg/kg curcumin (CUR15), basal diet + 30 mg/kg curcumin (CUR30), basal diet + 15 mg/kg nano-curcumin (Nano15), and basal diet + 30 mg/kg nano-curcumin (Nano30) for 10 wk. The slope ratio method was used to estimate the bioavailability of nano-curcumin by regressing each response on supplemental curcumin intake. Increasing dietary curcumin (P < 0.001) elicited a linear response to all studied traits. The RBV for volume, viability, motility, HOST, RW-testis, and GPx were estimated as 135 (CI: 115-156%), 143 (CI: 114-173%), 159 (CI: 122-196%), 132 (CI: 107-157%), 195 (CI: 126-264%), 176 (CI: 103-249%), and 178% (28-328%), respectively. Our findings revealed that curcumin nanoparticles enhance the reproductive efficiency of aged breeder roosters. In addition, the curcumin nanoparticles RBV exceeded that of natural curcumin, suggesting that lower concentrations of curcumin nanoparticles could have a significant effect on reproductive characteristics.

The Antihypertensive Effect of Marchin-13 Tang on L-NAME-induced Hypertension in Rats

Marchin-13 Tang is a traditional Mongolian medicine widely used to reduce blood pressure. The study aimed to evaluate the anti-hypertensive effect of Marchin-13 (M-13) Tang in the L-NAME-induced model of hypertension. The biological composition activity of M-13 Tang was examined using the UV spectrophotometric method. The experimental groups induced Hypertension models by L-NAME 40 mg/kg. The concentrations of serum nitric oxide (NO), Angiotensin-Converting Enzyme (ACE), superoxide dismutase (SOD), malondialdehyde (MDA), and catalase (CAT) were measured in M-13 Tang treatment groups by enzyme-linked immunosorbent assay (ELISA). The content of total phenolics was measured at 2.96±0.16%, while flavonoids were found to be present at a level of 1.81±0.1%. The reductions in mean arterial pressure (MAP) were statistically significant. They were observed from day 14 to day 21 after giving M-13 Tang at 90 mg/kg and 180 mg/kg (p&lt;0.01). Moreover, treated with M-13 Tang 90 mg/kg and 180 mg/kg groups, serum levels of NO, SOD, and CAT were significantly (p&lt;0.01) increased compared with the L-NAME (40 mg/kg) group. The levels of MDA and ACE showed a significant decrease in both the Marchin-13 Tang-treated groups compared to the L-NAME group (p&lt;0.05). The results of our study illustrate that Marchin-13 effectively reduced blood pressure by mitigating oxidative stress, enhancing NO production, and decreasing ACE levels in hypertensive rats induced by L-NAME.

Lycium barbarum-Derived Polysaccharides Alleviate DNA Damage and Oxidative Stress Caused by Ultraviolet Radiation in Corneal Epithelial Cells

Purpose Lycium barbarum polysaccharides (LBPs) have been proven to protect the eyes by inhibiting apoptosis. This study was designed to investigate the effect of LBPs on DNA damage and oxidative stress induced by ultraviolet B (UVB) radiation in human corneal epithelial cells (HCECs). Methods HCECs were divided into a control group, UVB group and UVB + LBP group and treated with varying concentrations of LBP (0, 0.05, 0.1, 0.2, 0.4, 0.8, 1.6 and 3.2 mg/mL). Then, the effects of LBP on the viability and apoptosis of HCECs were detected via MTT assay and flow cytometry. Additionally, the contents of superoxide dismutase (SOD), malondialdehyde (MDA), and reactive oxygen species (ROS) in the cells of each group were measured to evaluate the level of oxidative stress. Results LBP at a concentration of 0.4 mg/mL showed the best effect on promoting the viability and inhibiting the apoptosis of HCECs. Compared with the control group, the UVB and UVB + LBP groups exhibited significantly decreased levels of cell viability and SOD and notably increased apoptosis, MDA, ROS, tail DNA percentage, olive tail moment, p-CHK2, and gamma histone (γH2AX). In contrast to the UVB group, the UVB + LBP group presented notably upregulated levels of cell viability and SOD and downregulated apoptosis, MDA, ROS, tail DNA percentage, olive tail moment, p-CHK2, and γH2AX. Conclusions The optimal concentration of LBP to promote the viability and reduce the apoptosis of HCECs is 0.4 mg/mL. Moreover, LBP can alleviate DNA damage and oxidative stress induced by UVB in HCECs.

Antioxidant protection of a polysaccharide produced by Chaetomium globosum CGMCC 6882 on H2O2-challenged HepG2 cells

Effective utilization of waste kitchen oil (WKO) is important to environmental protection and economic development. Presently, an endophytic fungus Chaetomium globosum CGMCC 6882 polysaccharide (CGP-WKO) was successfully produced through submerged fermentation with the sole carbon source of WKO. CGP-WKO had a yield of 1.53 ± 0.27 g/L and contained 95.85 % ± 3.02 % carbohydrate and 2.94 % ± 0.62 % protein. Structural feature analysis indicated that CGP-WKO contained glucose, glucosamine, mannose, rhamnose, galactose, fructose, and glucuronic acid in a molar ratio of 30.38: 1.34: 32.22: 9.68: 1.59: 0.62: 3.73. The weight-averaged molecular weight of CGP-WKO was 26.64 kDa, and its polydispersity was 1.48. Moreover, antioxidant capacity detection in vitro demonstrated that when the concentration of CGP-WKO was 1.0 mg/mL, its scavenging effects against 1,1-diphenyl-2-picrylhydrazyl; 2,2′-azinobis-di-(3-ethyl-benzothiazolin-6-sulfonic acid) diammonium salt; and hydroxyl and superoxide radicals were 45.89 % ± 1.89 %, 55.89 % ± 1.12 %, 29.02 % ± 2.61 %, and 52.76 % ± 2.12 %, respectively; and the IC50 values were 6.4612, 0.8888, 13.8585, and 0.9398 mg/mL, respectively. CGP-WKO increased the content of superoxide dismutase, catalase, and glutathione peroxidase and reduced malondialdehyde content in H2O2-challenged HepG2 cells. Overall, the present work indicated that CGP-WKO can be used as an antioxidant agent in the food, cosmetics, and pharmaceutical industries.

Abscisic acid enhances alkaline stress tolerance in grapevines: Physiological and transcriptional profiling

Abscisic acid (ABA) is a crucial signaling regulator governing plant growth and survival during adverse conditions. However, the mechanism by which ABA mediates grapevine tolerance to alkali stress has not yet been elucidated. Here, we investigated the role of ABA in regulating physiological characteristics and transcriptome of grapevines under alkali stress through the application of exogenous ABA and fluridone (an ABA biosynthesis inhibitor). The results revealed that alkali stress led to significant reductions in the net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular CO2 concentration (Ci), transpiration rate (Tr), chlorophyll content, the maximum quantum yields of primary photochemistry of PSII (Fv/Fm), nonphotochemical quenching (NPQ), which were greatly alleviated by exogenous ABA (50 and 100 μM) application. Specifically, the application of exogenous ABA (50 μM) increased Pn, chlorophyll content and Fv/Fm by 28.39 %, 30.45 % and 17.29 %, respectively, compared with alkali stress alone. Furthermore, exogenous ABA treatment reduced alkali stress-induced superoxide anions (O2∙−) and hydrogen peroxide (H2O2), malondialdehyde (MDA), and electrolyte leakage, as well as higher proline content and activities of superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX). Additionally, exogenous ABA (50 μM) decreased O2∙−, H2O2, MDA, electrolyte leakage by 38.64 %, 28.16 %, 39.29 % and 39.42 %, respectively, respect to alkali stress alone. Moreover, exogenous ABA reduced the Na+, increased K+ and K+/Na+ ratio, as well as the phenylalanine ammonia-lyase (PAL), chalcone synthase (CHS), chalcone isomerase (CHI) activities and flavonoid content, and increased zeaxanthin epoxidase (ZEP) and 9-cis-epoxy carotenoid dioxygenase (NCED) activities and endogenous ABA levels in alkali stress-treated grapevines. Exogenous ABA (50 μM) increased flavonoid content and endogenous ABA content by 74.03 % and 20.84 %, compared with alkali stress alone, respectively. Conversely, exogenous fluridone exacerbated alkali stress-induced physiological damage in grapevine plants. Transcriptome analysis revealed that exogenous ABA (50 μM) and fluridone significantly induced the ‘Plant hormone signal transduction (ko04075)’, the ‘MAPK signaling pathway-plant (ko04016)’, ‘ABC transporters (ko02010)’, ‘Photosynthesis-antenna proteins (ko00196)’, ‘Flavonoid biosynthesis (ko00941)’, ‘Phenylpropanoid biosynthesis (ko00940)’ and other biological pathways and key gene involved in chlorophyll metabolism and ion transport. In conclusion, ABA markedly enhanced grapevines tolerance to alkali stress by modulating key biological pathways and physiological characteristics.

Regulating effect of Qifu Yin on intestinal microbiota in mice with memory impairment induced by scopolamine hydrobromide

Ethnopharmacological relevanceQifu Yin (QFY) originates from “Jingyue Quanshu · Volume 51 · New Fang Bazhen · Buzhen” a work by Zhang Jingyue, a distinguished Chinese medical practitioner from the Ming Dynasty. QFY is composed of Ginseng Radix et Rhizoma, Rehmanniae Radix Praeparata, Angelicae Sinensis Radix, Atractylodis Macrocephalae Rhizoma, Glycyrrhizae Radix et Rhizoma Praeparata Cum Melle, Ziziphi Spinosae Semen, and Polygalae Radix. QFY is frequently employed to address memory loss and cognitive impairment stemming from vascular dementia, Alzheimer's disease (AD), and related conditions. Our findings indicate that QFY can mitigate nerve cell damage. Moreover, the study explores the impact of QFY on the calcium ion pathway and sphingolipid metabolism in mice with myocardial infarction, presenting a novel perspective on QFY's mechanism in ameliorating myocardial infarction through lipidomics. While this research provides an experimental foundation for the clinical application of QFY, a comprehensive and in-depth analysis of its improvement mechanism remains imperative. Aim of the studyTo clarify the regulatory mechanism of QFY on intestinal microecology in mice with memory impairment (MI). Material and methodsThe memory impairment mouse model was established by intraperitoneal injection of scopolamine hydrobromide. Kunming (KM) mice were randomly divided into blank group, Ginkgo tablet group (0.276 g/kg), QFY high, medium and low dose groups (17.2 g/kg, 8.6 g/kg, 4.3 g/kg). The effect on memory ability was evaluated by open field and step-down behavioral experiments. The morphological changes of nerve cells in the hippocampus of mice were observed by pathological method. The contents of superoxide dismutase (SOD), malondialdehyde (MDA), catalase (CAT) and glutathione peroxidase (GSH-Px) in the brain tissue of mice were detected. The expression levels of CREB, Brain-Derived Neurotrophic Factor (BDNF) and Recombinant Amyloid Precursor Protein (APP) in the hippocampus of mice were determined using immunohistochemistry. The expression of N-methyl-D-aspartate receptor (NMDAR) and cAMP response element binding protein (CREB) related factors in the serum of mice was analyzed by ELISA. The levels of apoptosis signal-regulating kinase-1 (ASK1) and c-Jun N-terminal kinase (JNK) mRNA in the hippocampus were detected by quantitative real-time fluorescence polymerase chain reaction (qPCR). The intestinal feces of mice were collected, and the 16 S rDNA technology was used to detect the changes in intestinal microbiota microecological structure of feces in each group. ResultsBehavioral experiments showed that the high-dose QFY group exhibited a significant increase in exercise time (P<0.05) and a decrease in diagonal time (P<0.05) compared to the model group. The medium-dose group of QFY showed a reduction in diagonal time (P<0.05). Additionally, the latency time significantly increased in the medium and high-dose groups of QFY (P<0.01). The number of errors in the low, medium and high dose groups was significantly decreased (P<0.05, P<0.01, P<0.01). The nerve cells in the CA1 and CA3 regions of QFY-treated mice demonstrated close arrangement and clear structure. Furthermore, the content of SOD significantly increased (P<0.01) and the content of MDA significantly decreased (P<0.05) in the low and high-dose QFY groups. The content of CAT in the medium-dose group significantly increased (P < 0.05). Immunohistochemical analysis showed a significant reduction in the number of APP expression particles in the CA1 and CA3 regions of all QFY groups. Moreover, BDNF expression significantly increased in the medium and high-dose groups, while CREB expression significantly increased in the low and medium-dose groups of QFY within the CA1 and CA3 regions. Serum analysis revealed significant increases in CREB content in the low, medium, and high dose groups of QFY (P<0.01, P<0.05, P<0.05), and decreases in NMDAR content across all QFY dose groups (P<0.01). PCR analysis showed a significant decrease in the contents of ASK1 and JNK in the medium-dose group (P<0.01). Microecological analysis of intestinal microbiota demonstrated a significant restoration trend in the relative abundance of Fusobacteria, Planctomycetes, and Verrucomicrobia (P<0.01 or P<0.05) at the phylum level in the QFY groups. At the genus level, Akkermansia, Paramuribaculum, Herminiimonas, Erysipelatoclostridium and other genera in the QFY groups showed a significant trend of relative abundance restoration (P<0.01 or P<0.05). ConclusionQFY can improve the memory of MI animals induced by scopolamine hydrobromide by restoring the homeostasis of intestinal microbiota and regulating related indexes in serum and brain tissue.

Postprandial Antioxidative Response to Ingestion of Formulated Date- and Fruit-Based Nutritional Bars by Healthy Individuals.

Nutritional bars (NBs) are gaining popularity among healthy and athletic individuals, but postprandial antioxidative response has not been investigated. Therefore, the current study examined the postprandial alterations in total phenolic content (TPC), total antioxidant capacity (T-AOC), malondialdehyde (MDA), and Superoxide dismutase (SOD) in the plasma of healthy individuals after the ingestion of 140 g (510 Kcal) from formulated date-based bars (DBBs) or fruit-based bars (FBBs). Firstly, the free and bound phenolic contents (PCs) were determined to be 10.15 and 12.98 and 6.19 and 3.57 mg GAE g-1, respectively. FBBs were significantly higher in free PC than DBBs, while DBBs were considerably higher in bound PC than FBBs. Secondly, twenty participants with age, height, weight, body mass index (BMI), fat mass, and fat-free mass averages of 21.4 years, 170.0 cm, 66.3 kg, 22.9 kg m2, 14.5, and 29.2 kg, respectively, were subjected to metabolic experiments (ISRCTN19386758). Ingestion of 140 g of FBB or DBB resulted in 288.50 or 302.14 µg TPC mL-1 blood, respectively. Postprandial TPC content increased with time progression and peaked after 120 min. T-AOC contents averaged 22.63 and 23.61 U mL-1 before ingestion of FBBs or DBBs, respectively. The T-AOC content increased significantly 120 and 180 min after ingestion of DBBs, while no significant change was noted after consuming FBBs. A significant decrease in MDA content was observed 180 min after consuming DBBs, while no significant change was noted after consuming FBBs. SOD concentrations ranged from 193.99 to 201.07 U L-1 in FBBs and DBBs, respectively. No considerable response was noted up to 3 h after ingestion of FBBs. On the contrary, a significant response was found 120 min after consuming DBBs. Pearson's correlation coefficient indicated a highly significant positive correlation coefficient (p < 0.01) between T-AOC and either MDA or SOD, as well as between MDA and SOD. The principal component analysis demonstrated a strong and positive relationship between SOD and TPC at 60 and 120 min after DBB ingestion. In conclusion, the relative changes in postprandial responses in T-AOC and MDA did not significantly (p > 0.05) differ between DBBs and FBBs, except for TPC (p = 0.04, paired t-test) and SOD (p = 0.003, paired t-test). Further studies with an extended experimental time are needed to confirm the current findings.

Unveiling the protective role of sevoflurane in video-assisted thoracoscopic surgery associated-acute lung injury: Inhibition of ferroptosis

Acute lung injury (ALI) frequently occurs after video-assisted thoracoscopic surgery (VATS). Ferroptosis is implicated in several lung diseases. Therefore, the disparate effects and underlying mechanisms of the two commonly used anesthetics (sevoflurane (Sev) and propofol) on VATS-induced ALI need to be clarified. In the present study, enrolled patients were randomly allocated to receive Sev (group S) or propofol anesthesia (group P). Intraoperative oxygenation, morphology of the lung tissue, expression of ZO-1, tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), superoxide dismutase (SOD), glutathione (GSH), Fe2+, glutathione peroxidase 4 (GPX4), and phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT)/nuclear factor erythroid-2-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) pathway in the lung tissue as well as the expression of TNF-α and IL-6 in plasma were measured. Postoperative complications were recorded. Of the 85 initially screened patients scheduled for VATS, 62 were enrolled in either group S (n = 32) or P (n = 30). Compared with propofol, Sev substantially (1) improved intraoperative oxygenation; (2) relieved histopathological lung injury; (3) increased ZO-1 protein expression; (4) decreased the levels of TNF-α and IL-6 in both the lung tissue and plasma; (5) increased the contents of GSH and SOD but decreased Fe2+ concentration; (6) upregulated the protein expression of p-AKT, Nrf2, HO-1, and GPX4. No significant differences in the occurrence of postoperative outcomes were observed between both groups. In summary, Sev treatment, in comparison to propofol anesthesia, may suppress local lung and systemic inflammatory responses by activating the PI3K/Akt/Nrf2/HO-1 pathway and inhibiting ferroptosis. This cascade of effects contributes to the maintenance of pulmonary epithelial barrier permeability, alleviation of pulmonary injury, and enhancement of intraoperative oxygenation in patients undergoing VATS.

Tetramethylpyrazine alleviates ferroptosis and promotes functional recovery in spinal cord injury by regulating GPX4/ACSL4

ObjectiveTetramethylpyrazine (TMP) has been demonstrated to alleviate neuronal ferroptosis following spinal cord injury (SCI), thereby promoting neural repair. However, the precise underlying mechanisms remain elusive. MethodsThe SCI model was established using a modified version of Allen's method. TMP (40, 80, 120, and 160 mg/kg) and ras-selective lethal 3 (RSL3) (5 mg/kg) were administered intraperitoneally once daily for 7 days. HE and Nissl staining were employed to examine histomorphology and neurons, respectively. Perls staining was used to identify the distribution of iron. A transmission electron microscope was used to observe the microcosmic morphology of mitochondria. Immunofluorescence staining and Western blot were used to analyze neuronal nuclear protein (NeuN) and glial fibrillary acidic protein (GFAP) surrounding injury sites. Additionally, glutathione peroxidase 4 (GPX4)/NeuN + cells and acyl-CoA synthetase long-chain family member 4 (ACSL4)/NeuN + cells were observed. RT-qPCR was conducted to examine the mRNA expression levels of GPX4 and ACSL4. ELISA were used to quantify the concentrations of GPX4, reactive oxygen species (ROS), L-glutathione (GSH), malondialdehyde (MDA), superoxide dismutase (SOD), and tissue iron. ResultsTMP had an inhibitory effect on the concentrations of tissue iron, ROS, GSH, MDA, and SOD. TMP improved the microcosmic morphology of mitochondria and increased GPX4 level while decreasing that of ACSL4. TMP reduced lesion sizes, enhanced neuronal survival, and inhibited glial scar formation. However, the effect of TMP can be effectively reversed by RSL3. ConclusionTMP alleviates neuronal ferroptosis by regulating the GPX4/ACSL4 axis, thereby protecting the remaining neurons surrounding injury sites and reducing glial scar formation.

Effects of Dandelion Extract on Promoting Production Performance and Reducing Mammary Oxidative Stress in Dairy Cows Fed High-Concentrate Diet.

This study investigated the effects of rumen bypass dandelion extract on the lactation performance, immune index, and mammary oxidative stress of lactating dairy cows fed a high-concentrate diet. This study used a complete randomized block design, and initial milk production, somatic cell counts, and parities were set as block factors. Sixty Holstein cows with similar health conditions and lactating periods (70 ± 15 d) were divided into three groups with 20 replicates per group. The treatments included the LCD group (low-concentrate diet, concentrate-forage = 4:6), HCD group (high-concentrate group, concentrate-forage = 6:4), and DAE group (dandelion aqueous extract group, HCD group with 0.5% DAE). The experimental period was 35 d, and cows were fed three times in the morning, afternoon, and night with free access to water. The results showed the following: (1) Milk production in the HCD and DAE groups was significantly higher (p < 0.05) than that in the LCD group from WK4, and the milk quality differed during the experimental period. (2) The HCD group's pH values significantly differed (p < 0.01) from those of the LCD and DAE groups. (3) In WK2 and WK4 of the experimental period, the somatic cell counts of dairy cows in the HCD group were significantly higher (p < 0.05) than those in the DAE group. (4) The serum concentrations of 8-hydroxy-2'-deoxyguanosine (8-OHdG) and protein carbonyl (PC) in the HCD group were significantly higher (p < 0.05) than those in the LCD group. The activity of catalase (CAT) in the LCD and DAE groups was stronger (p < 0.01) than that in the HCD group. (5) The correlation analysis revealed significantly positive correlations between the plasma LPS concentration and serum concentrations of 8-OHdG (p < 0.01), PC (p < 0.01), and malondialdehyde (MDA, p < 0.05) and significantly negative correlations (p < 0.01) between the plasma LPS concentration and activities of CAT and superoxide dismutase. (6) Compared with that in the HCD and DAE groups, the mRNA expression of α, β, and κ casein and acetyl CoA carboxylase in bovine mammary epithelial cells was significantly higher (p < 0.05) in the LCD group, and the mRNA expression of fatty acid synthetase and stearoyl CoA desaturase in the LCD group was significantly higher (p < 0.01) than that in the HCD group. (7) Compared with that in the LCD and HCD groups, the mRNA expression of Nrf2 was significantly higher (p < 0.01) in the DAE group, and the mRNA expression of cystine/glutamate transporter and NAD (P) H quinone oxidoreductase 1 in the DAE group was significantly higher (p < 0.05) than that in the HCD group. Overall, feeding a high-concentrate diet could increase the milk yield of dairy cows, but the milk quality, rumen homeostasis, and antioxidative capability were adversely affected. The supplementation of DAE in a high-concentrate diet enhanced antioxidative capability by activating the Nrf2 regulatory factor and improved rumen homeostasis and production performance.

Decreased antioxidant capacity in children with diabetic ketoacidosis

Objective. To analyze the levels of antioxidant enzyme superoxide dismutase (SOD) and glutathione peroxidase (GP) against the background of diabetic ketoacidosis (DKA) in type 1 diabetes mellitus (DM) children and adolescents. Materials and methods. The study involved examination of 74 children: 50 DKA children (study group) and 24 relatively healthy children (control group). The study group children were divided into two subgroups: subgroup 1 included children with DKA against the background of type 1 DM onset (n=27), subgroup 2 consisted of children with DKA against the background of chronic type 1 DM (n=23). SOD and GP concentrations in blood plasma were determined in all children by enzyme immunoassay. The reliability between the data was estimated using the Mann-Whitney test, Kruskal-Wallis test and Spearman coefficient. Results. A significant decrease in SOD and GP in children with DKA was revealed as follows: 13130 [13005–18255] Pg/ml and 50.085 [42.02–70.325] Ng/ml, compared to controls: 16415 [13370–19935] Pg/ml and 84.695 [52.49–144.5] Ng/ml, respectively. Minimal SOD and GP were noted in patients with DKA at the background of chronic type 1 DM, compared to DM onset children. The study indicates a reliable correlation between age, duration of the disease, number of DKA in the history and low values of SOD and GP. Conclusion. Decreased antioxidant capacity was found in children with DKA in type 1 DM. SOD and GP can be considered in pediatric practice as markers of oxidative stress in DKA. In addition, an early detection of SOD and GP contributes to the efficient therapy of DKA in children and adolescents.

The protective effect of Lonicera japonica Thunb. against lipopolysaccharide-induced acute lung injury in mice: Modulation of inflammation, oxidative stress, and ferroptosis

Ethnopharmacological relevanceVarious components of Lonicera japonica Thunb. (LJT) exhibit pharmacological activities, including anti-inflammatory and antioxidant effects. Nevertheless, the relationship between LJT and ferroptosis remains largely unexplored. Aim of the studyThe purpose of this research was to look into the role of LJT in regulating LPS-induced ferroptosis in ALI and to compare the effects of different parts of LJT. Materials and methodsWe established a mice ALI model by treating with LPS. Administered mice with different doses of Lonicerae Japonicae Flos (LJF), Lonicera Japonica Leaves (LJL) and Lonicerae Caulis (LRC) extracts, respectively. The levels of IL-6, IL-1β, TNF-α, IL-4, IL-10, and PGE2 in bronchoalveolar lavage fluid (BALF) were measured using enzyme-linked immunosorbent assay. Furthermore, the concentrations of superoxide dismutase (SOD), malondialdehyde (MDA), glutathione (GSH), reactive oxygen species (ROS), and total ferrous ions (Fe2+) in lung tissues were evaluated. Hematoxylin and eosin staining was conducted to examine the morphological structure of lung tissues. Transmission electron microscopy was used to investigate the ultrastructural morphology of mitochondria. Furthermore, the effects of LJT were evaluated via immunohistochemical staining, western blotting, and quantitative real-time polymerase chain reaction analyses. Finally, employing molecular docking and molecular dynamics research techniques, we aimed to identify crucial components in LJT that might inhibit ferroptosis by targeting nuclear factor erythroid 2-related factor 2 (Nrf2) and glutathione peroxidase 4 (GPX4). ResultsWe observed that pretreatment with LJT significantly mitigated LPS-induced lung injury and suppressed ferroptosis. This was supported by reduced accumulation of pro-inflammatory cytokines, ROS, MDA, and Fe2+, along with increased levels of anti-inflammatory cytokines, SOD, GSH, Nrf2, and GPX4 in the lung tissues of ALI mice. Luteolin-7-O-rutinoside, apigenin-7-O-rutinoside, and amentoflavone in LJT exhibit excellent docking effects with key targets of ferroptosis, Nrf2 and GPX4. ConclusionsPretreatment with LJT may alleviate LPS-induced ALI, possibly by suppressing ferroptosis. Our initial results indicate that LJT activates the Nrf2/GPX4 axis, providing protection against ferroptosis in ALI. This finding offers a promising therapeutic candidate for ALI treatment.