Peroxidación lipídica y estrés laboral en trabajadores de una universidad privada del norte de Perú

Objetivo: Establecer la relación entre los niveles de estrés laboral y la producción de malondialdehído (MDA), como producto de la peroxidación lipídica, en los trabajadores de la Universidad Católica Santo Toribio de Mogrovejo en Chiclayo. Materiales y métodos: Investigación descriptiva, de tipo correlacional. La muestra estuvo conformada por 72 trabajadores, de los cuales 37 eran docentes y 35, administrativos. Se midió espectrofotométricamente el MDA presente en el plasma mediante la reacción con ácido tiobarbitúrico (TBA). Para determinar el estrés se utilizó la Escala de Estrés Laboral, elaborada por Ivancevich y Matteson en 1989, y adaptada por Suárez en 2013. El instrumento consta de 25 ítems y está compuesto por siete dimensiones: clima organizacional, estructura organizacional, territorio organizacional, tecnología, influencia del líder, falta de cohesión y respaldo del grupo. Resultados: En la investigación participaron 23 hombres y 49 mujeres. La edad media fue de 45,1 años y la desviación estándar de 11,33, con un mínimo de 25 y máximo de 68 años. El estrés laboral elevado se observó en mayor porcentaje en las dimensiones influencia del líder (19,40 %), estructura organizacional (16,70 %) y territorio organizacional (16,70 %). El 54 % (39) de los trabajadores presentaron niveles altos del MDA, es decir, valores superiores en plasma a 3,94 µM. De ellos, 17 fueron hombres y 22, mujeres. Al evaluar, con Rho de Spearman al 95 % de significancia, la correlación entre los valores de MDA con el sexo, trabajar en otro centro laboral y la atención de hijos en el hogar, resultaron valores de p = 0,08, p = 0,61 y p = 0,33, respectivamente; por lo tanto, no hubo significancia estadística. Conclusiones: Del total de trabajadores evaluados, el 54 % presentó alta concentración de malondialdehído plasmático. Aunque no hubo correlación estadísticamente significativa, las dimensiones con alto nivel de estrés, según la prueba aplicada, influencia del líder, estructura organizacional y territorio organizacional mostraron niveles de estrés en el orden de 19,40 %, 16,70 % y 16,70 %, respectivamente.

Objective: To establish the relationship between occupational stress levels and the production of malondialdehyde (MDA), as a product of lipid peroxidation, among workers of Universidad Católica Santo Toribio de Mogrovejo in Chiclayo. Materials and methods: A descriptive, correlational research. The sample consisted of 72 workers, 37 of whom were professors and 35 administrative staff members. Plasma MDA was measured spectrophotometrically by thiobarbituric acid (TBA) reaction. To determine stress, the Occupational Stress Scale, developed by Ivancevich and Matteson in 1989 and adapted by Suárez in 2013, was used. The instrument had 25 items and seven dimensions: organizational climate, organizational structure, organizational territory, technology, leadership influence, lack of cohesion and group support. Results: Twenty-three men and 49 women participated in the research. The mean age was 45.1 years and the standard deviation was 11.33, with a minimum of 25 and a maximum of 68 years. The highest percentage of high occupational stress was observed in the dimensions leadership influence (19.40 %), organizational structure (16.70 %) and organizational territory (16.70 %). A total of 39 workers (54 %), 17 of whom were men and 22 were women, had high levels of MDA-i.e., plasma values higher than 3.94 µM. Spearman's Rho at 95 % confidence interval showed that the correlation between MDA values and sex, working in another workplace and childcare at home were p = 0.08, p = 0.61 and p = 0.33, respectively; therefore, there was no statistical significance. Conclusions: Out of all workers, 54 % had high plasma levels of MDA. Although no statistically significant correlation was found, the dimensions leadership influence, organizational structure and organizational territory showed high stress levels on the order of 19.40 %, 16.70 % and 16.70 %, respectively.

In vivo antioxidant activity of rabbiteye blueberry (Vaccinium ashei cv. 'Brightwell') anthocyanin extracts / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

Blueberries are rich in phenolic compounds including anthocyanins which are closely related to biological health functions. The purpose of this study was to investigate the antioxidant activity of blueberry anthocyanins extracted from 'Brightwell' rabbiteye blueberries in mice. After one week of adaptation, C57BL/6J healthy male mice were divided into different groups that were administered with 100, 400, or 800 mg/kg blueberry anthocyanin extract (BAE), and sacrificed at different time points (0.1, 0.5, 1, 2, 4, 8, or 12 h). The plasma, eyeball, intestine, liver, and adipose tissues were collected to compare their antioxidant activity, including total antioxidant capacity (T-AOC), superoxide dismutase (SOD) activity and glutathione-peroxidase (GSH-PX/GPX) content, and the oxidative stress marker malondialdehyde (MDA) level. The results showed that blueberry anthocyanins had positive concentration-dependent antioxidant activity in vivo. The greater the concentration of BAE, the higher the T-AOC value, but the lower the MDA level. The enzyme activity of SOD, the content of GSH-PX, and messenger RNA (mRNA) levels of Cu,Zn-SOD, Mn-SOD, and GPX all confirmed that BAE played an antioxidant role after digestion in mice by improving their antioxidant defense. The in vivo antioxidant activity of BAE indicated that blueberry anthocyanins could be developed into functional foods or nutraceuticals with the aim of preventing or treating oxidative stress-related diseases.

Correlation of fasting blood, salivary glucose and malondialdehyde in subjects with & without type 2 diabetes

Oxidative stress is identified as the common pathogenic factor that leads to insulin resistance in diabetics. Malondialdehyde is a product of lipid peroxidation. Aim: The aim of this study was to determine the variation in the Salivary malondialdehyde (MDA) among subjects with and without T2DM in comparison to the fasting blood and Salivary glucose. Methods: This study involved 29 healthy participants as Controls (group I) and 29 participants with Type 2 Diabetes Mellitus as Cases (group II). Salivary Glucose was analysed by glucose oxidase end-point assay. Thiobarbituric acid (TBA) assay method was considered for estimation of MDA in fasting saliva. Data was Statistically analysed using SPSS20. Parametric test was performed to analyse the data. Results: The correlation calculated between FBG with FSG level was found to be highly significant. A positive correlation between MDA levels with FBG was found. The relationship between FBG and FSG (r = 0.7815, p < 0.05), FBG and MDA (r =0.3678, p < 0.05) and FSG and MDA (r = 0.2869, p < 0.05) were found to be positively significant. Conclusion: Saliva as a unique body fluid can serve as a medium for biochemical analysis only in standard settings and with multiple measures to be used as a diagnostic tool in par with the gold standard serum. Salivary MDA levels can be considered as one of the oxidative stress markers in Type 2 Diabetic condition

Resveratrol Attenuates Degeneration and Apoptosis of Cardiomyocytes Induced by Aortic Clamping

ABSTRACT Introduction: Objective: To investigate the potential beneficial effects of resveratrol (RVT) against ischemia-reperfusion injury of myocardial tissue during surgical treatment of ruptured abdominal aortic aneurysm. Methods: Four groups were established — control, ischemia/reperfusion (I/R), sham (I/R+solvent/dimethyl sulfoxide [DMSO]), and I/R+RVT. Ruptured abdominal aortic aneurysm model was used as the experimental protocol. Results: In the I/R and I/R+DMSO groups, malondialdehyde (MDA) levels in myocardial tissue were found to be significantly increased compared to the control group. The MDA level in myocardial tissue was significantly decreased in the I/ R+RVT group compared to the I/R group. In I/R and I/R+DMSO groups, glutathione peroxidase (GSH) levels in myocardial tissue were found to be significantly decreased compared to the control group. The GSH level in the myocardial tissue was significantly increased in the I/R+RVT group compared to the I/R group. In the light microscope, isotropic and anisotropic band disorganized atypical cardiomyocytes in the I/R group and degenerative cardiomyocytes and edematous areas in the I/R+DMSO group were observed. Degenerative cardiomyocytes and edematous areas were decreased in the I/R+RVT group. When heart tissue sections incubated with cleaved caspase-3 primary antibodies were examined under the light microscope, apoptotic cardiomyocytes were present in I/R and I/R+DMSO groups. A decrease in the number of apoptotic cardiomyocytes was observed in the I/R+RVT group. Conclusion: The findings of the present study indicate that RVT exhibits protective effects against ischemia-reperfusion injury occurring in the myocardium as a distant organ as a result of abdominal aorta clamping.

Role of Oxidative Stress in Ulcerative Colitis and Traditional Chinese Medicine Prevention and Treatment： A Review / 中国实验方剂学杂志

Ulcerative colitis （UC） is a commonly seen digestive system disease with unclear pathogenesis. The condition is complex and variable， often chronic， and has a long treatment period with no specific cure. Currently， the treatment of UC often involves the use of corticosteroids， aminosalicylates， and biologics in western medicine， which provide fast-acting and definite efficacy in the short term. However， with prolonged medication， some patients may develop drug resistance and worsening of the disease， leading to the occurrence of colon cancer. Research has found that oxidative stress is one of the important pathogenic factors in UC and influences its onset and development. Oxidative stress is a state of imbalance between oxidative products and the antioxidant system in the body， characterized by overexpression of oxidative products such as malondialdehyde （MDA）， reactive oxygen species （ROS）， nitric oxide （NO）， or deficiency of antioxidant enzymes such as superoxide dismutase （SOD）， catalase （CAT）， and glutathione （GSH）. It is worth noting that traditional Chinese medicine （TCM）， as a unique characteristic medicine of China， has achieved significant efficacy in the treatment of UC. Studies have shown that TCM effectively inhibits the occurrence of UC by suppressing the accumulation of metabolites and antagonizes the development of UC by enhancing the antioxidant system. Therefore， using TCM to regulate the oxidative balance as a diagnostic and therapeutic approach may be a new method and direction for the treatment of UC in the future. Based on the above research， this article summarized the mechanisms of key pathogenic proteins in oxidative stress and the occurrence and development of UC， and compiled the effective ingredients of Chinese medicine， single drugs， prescriptions， and acupuncture and moxibustion in regulating upstream and downstream target proteins of oxidative stress. These interventions can reduce pathological damage to the intestinal mucosa， lower the colon injury index， enrich the intestinal microbiota， increase colon length， and improve clinical symptoms of UC. The article is expected to expand the application of TCM in the treatment of UC and provide a reliable scientific theoretical basis.

Effects of thoracic segment epidural anesthesia on inflammatory factors in patients undergoing lung cancer surgery / 中国基层医药

Objective:To investigate the effects of thoracic segment epidural anesthesia on inflammatory factors in patients undergoing lung cancer surgery.Methods:The clinical data of 136 patients who underwent lung cancer surgery in the Second People's Hospital of Liaocheng from June 2020 to May 2022 were retrospectively analyzed. According to anesthesia methods, these patients were divided into an observation group ( n = 89) and a control group ( n = 47). The observation group was given thoracic segment epidural anesthesia, while the control group was given remifentanil infusion anesthesia. The tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-10 (IL-10) levels in the epithelial lining fluid collected from the non-dependent lung, the plasma levels of TNF-α, IL-6, and malondialdehyde, arterial partial pressure of oxygen/inhaled oxygen fraction, the incidence of complications, the incidence of re-operations, numeric rating scale score, and the length of hospital stay were compared between the two groups. The effects of different anesthesia methods on lung cancer surgery were evaluated. Results:In each group, TNF-α, IL-6, and IL-10 levels in the epithelial lining fluid were significantly increased 30 minutes after termination of one-lung ventilation (T2) compared with those measured before one-lung ventilation (T1) ( t = 7.71, 77.10, 7.59, 3.41, 57.51, 5.74, all P < 0.05). In the observation group, TNF- α [(1.59 ± 0.53) ng/L, (1.89 ± 0.64) ng/L] measured at T1 and T2, IL-6 [(2.96 ± 0.82) ng/L] and IL-10 [(1.99 ± 0.53) ng/L] measured at T1 were significantly higher compared with those measured at the corresponding time points in the control group ( t = 10.45, 2.59, 2.00, 7.19, all P < 0.05). In the observation group, IL-6 measured at T2 [(38.91 ± 5.84) ng/L] was significantly lower than that in the control group ( t = 33.25, P < 0.001), and IL-10 measured at T2 [(2.51 ± 0.67) ng/L] was slightly, but not significantly higher than that in the control group ( P > 0.05). There was no significant difference in the plasma level of TNF- α measured at T1 and T2 between the two groups (both P > 0.05). Plasma levels of IL-6 in the two groups [(42.98 ± 5.29) ng/L, (27.93 ± 4.17) ng/L] measured at T2 were significantly increased compared with those measured at T1 ( t = 54.14, 61.06, both P < 0.001). In the observation group, TNF-α measured at T2 [(1.60 ± 0.56) ng/L] and IL-6 measured at T1 and T2 [(0.92 ± 0.16) ng/L, (27.93 ± 4.17) ng/L] were significantly lower compared with the control group ( t = 3.39, 6.96, 18.20, all P < 0.05). There were no significant differences in plasma level of malondialdehyde, arterial partial pressure of oxygen/inhaled oxygen fraction, numeric rating scale score, the incidence of complications, the incidence of re-operation, and the length of hospital stay between the two groups (all P > 0.05). Conclusion:Thoracic segment epidural anesthesia can reduce the local inflammatory response of the lung during lung cancer surgery.

Effects of neuroendoscopic hematoma removal versus soft channel drainage in the treatment of chronic subdural hematoma / 中国基层医药

Objective:To investigate the clinical efficacy of neuroendoscopic hematoma removal versus soft channel drainage in the treatment of chronic subdural hematoma. Methods:The clinical data of 102 patients with chronic subdural hematoma who received treatment in Jincheng People's Hospital from May 2018 to May 2020 were retrospectively analyzed. They were divided into the neuroendoscopy group ( n = 50) and the soft channel group ( n = 52) according to different surgical methods. Perioperative indexes, hematoma clearance rate, China Stroke Scale score, the activity of daily living score, and oxidative stress indexes were compared between the two groups. All patients were followed up for 3 months. The incidence of complications during the follow-up period was calculated. Results:The retention time of the drainage tube in the neuroendoscopy group was shorter than that in the soft channel group [(2.45 ± 0.63) days vs. (3.30 ± 0.78) days, t = 6.06, P < 0.001]. The length of hospital stay in the neuroendoscopy group was shorter than that in the soft channel group [(7.14 ± 1.65) days vs. (9.07 ± 2.11) days, t = 5.15, P < 0.001]. The hematoma clearance rate at postoperative 7 days in the neuroendoscopy group was higher than that in the soft channel group [(93.45 ± 5.50)% vs. (81.86 ± 7.24)%, χ2 = 9.12, P < 0.001]. There were no significant differences in operation time and intraoperative blood loss between the two groups (both P > 0.05). At postoperative 30 days, the China Stroke Scale score in the neuroendoscopy group was lower than that in the soft channel group [(12.74 ± 2.23) points vs. (18.67 ± 2.45) points, t = 12.79, P < 0.001]. The activity of daily life score in the neuroendoscopy group was significantly higher than that in the soft channel group [(77.69 ± 7.11) points vs. (91.35 ± 7.25) points, t = 9.60, P < 0.001]. At postoperative 7 days, glutathione peroxidase level in the neuroendoscopy group was significantly lower than that in the soft channel group [(130.75 ± 13.66) U/L vs. (148.60 ± 14.64) U/L, t = 6.37, P < 0.001]. Malondialdehyde level in the neuroendoscopy group was significantly lower than that in the soft channel group [(5.11 ± 0.65) nmol/L vs. (6.19 ± 0.74) nmol/L, t = 7.83, P < 0.001]. Superoxide dismutase level in the neuroendoscopy group was significantly higher than that in the soft channel group [(275.60 ± 22.33) U/L vs. (254.60 ± 18.55) U/L, t = 5.15, P < 0.001]. There was no significant difference in the incidence of complications between the two groups ( P > 0.05). Conclusion:Compared with soft channel drainage, neuroendoscopic hematoma removal can obtain better short-term curative effects and less oxidative stress response in the treatment of chronic subdural hematoma. Neuroendoscopic hematoma removal does not increase the incidence of postoperative complications and is highly safe.

Regulatory effects of tenofovir disoproxil fumarate on oxidative stress and peripheral blood Th17/Treg balance in patients with hepatitis B cirrhosis / 中国基层医药

Objective:To investigate the regulatory effects of tenofovir disoproxil fumarate on oxidative stress and peripheral blood Th17/Treg balance in patients with hepatitis B cirrhosis.Methods:A total of 102 patients with hepatitis B cirrhosis who received treatment in the Marine Police Corps Hospital of Chinese People's Armed Police, China from March 2020 to June 2021 were included in this study. They were randomly assigned to undergo treatment with either tenofovir disoproxil fumarate ( n = 51, observation group) or entecavir ( n = 51, control group) for 42 weeks. The levels of malondialdehyde (MDA), superoxide dismutase (SOD), nitric oxide (NO), T helper 17 cells (Th17), regulatory T cells (Treg), Th17/Treg ratio, hyaluronic acid (HA), laminin (LN), type III procollagen (PC III), type IV collagen (IV-C), hepatitis B virus DNA negative rate, HBeAg negative rate, and alanine aminotransferase normalization rate pre- and post-treatment as well as the incidence of adverse reactions were compared between the two groups. Results:Before treatment, there were no significant differences in SOD, MDA, NO, Th17, Treg, Th17/Treg ratio, HA, LN, PC III, IV-C between the two groups (all P > 0.05). After treatment, SOD and Treg in the observation group were (121.52 ± 23.52) U/L and (3.51 ± 0.70)% in the observation group, respectively, which were significantly higher than (113.30 ± 20.05) U/L and (3.14 ± 0.49)%, respectively in the control group ( t = 1.90, -4.14, both P < 0.05). MDA, NO and Th17, Th17/Treg ratio, HA, LN, PC III, and IV-C in the observation group were (7.40 ± 1.35) mmol/L, (22.56 ± 4.25) μmol/L, (1.29 ± 0.46)%, (0.45 ± 0.11), (212.52 ± 16.62) μg/L, (135.52 ± 14.02) μg/L, (132.52 ± 15.62) μg/L,(96.52 ± 10.02) μg/L, respectively, which were significantly lower compared with the control group ( t = -6.81, 4.02, 3.10, -8.46, -13.27, -15.23, -13.67, -17.38, all P < 0.05). Hepatitis B virus DNA negative rate, HBeAg negative rate, and alanine aminotransferase normalization rate in the observation group were 76.47% (39/51), 68.63% (35/51) and 74.51% (38/51), respectively, which were higher than 56.86% (29/51), 41.18% (21/51), 54.90% (28/51) in the control group ( χ2 = 4.41, 7.76, 4.29, all P < 0.05). There was no significant difference in the incidence of adverse reactions between the two groups ( P > 0.05). Conclusion:Tenofovir disoproxil fumarate is highly effective on hepatitis B cirrhosis. It can reduce oxidative stress and regulate peripheral blood Th17/Treg balance.

Effects of intravenous thrombolysis combined with Xingnaojing injection on intracranial arterial hemodynamic indexes and neurological function in patients with cerebral infarction / 中国基层医药

Objective:To investigate the effects of intravenous thrombolysis combined with Xingnaojing injection on hemodynamic indexes and neurological function in patients with cerebral infarction. Methods:A total of 142 patients with cerebral infarction who were treated in Xing An Meng Hospital from April 2020 to May 2021 were included in this study. They were randomly divided into a control group ( n = 71, intravenous thrombolysis) and a Xingnaojing injection group ( n = 71, intravenous thrombolysis + Xingnaojing injection). Intracranial arterial hemodynamic indexes, National Institutes of Health Stroke Scale score, Fugl-Meyer Assessment Scale score, serum inflammatory factors, oxidative stress indexes, brain injury markers, and the incidence of adverse reactions were compared between the two groups. Results:After treatment, serum levels of interleukin-1β, interleukin-6, and tumor necrosis factor-α were significantly lower in the Xingnaojing injection group than the control group [interleukin-1β: (4.05 ± 0.83) ng/L vs. (6.85 ± 1.02) ng/L, interleukin-6: (43.61 ± 5.14) ng/L vs. (60.31 ± 7.04) ng/L, tumor necrosis factor-α: (35.93 ± 4.25) ng/L vs. (20.93 ± 3.11) ng/L, t = 17.94, 16.14, 15.37, all P < 0.001]. After treatment, the mean blood flow velocities of the anterior cerebral artery, middle cerebral artery, and posterior cerebral artery in the Xingnaojing injection group were significantly higher than those in the control group [anterior cerebral artery: (49.36 ± 5.28) cm/s vs. (41.15 ± 5.12) cm/s, middle cerebral artery: (61.27 ± 7.02) cm/s vs. (50.19 ± 6.08) cm/s, posterior cerebral artery: (44.92 ± 5.63) cm/s vs. (37.26 ± 4.93) cm/s, t = 9.40, 10.05, 8.62, all P < 0.001]. After treatment, the National Institutes of Health Stroke Scale score and Fugl-Meyer Assessment Scale score in the Xingnaojing injection group were superior to those in the control group [National Institutes of Health Stroke Scale score: (10.36 ± 1.52) points vs. (14.62 ± 2.05) points, Fugl-Meyer Assessment Scale score: (76.19 ± 8.08) points vs. (65.28 ± 7.14) points, t = 14.06, 8.52, both P < 0.05]. After treatment, the serum level of malondialdehyde in the Xingnaojing injection group was significantly higher than that in the control group [(6.35 ± 1.02) μmol/L vs. (10.05 ± 1.63) μmol/L), t = 16.21, P < 0.001]. The serum level of superoxide dismutase in the Xingnaojing injection group was significantly lower than that in the control group [(114.31 ± 13.69) U/L vs. (92.25 ± 10.16) U/L), t = 10.90, P < 0.001]. Serum levels of neuron-specific enolase and S100β in the Xingnaojing injection group were significantly lower than those in the control group [neuron-specific enolase: (24.01 ± 3.24) IU/L vs. (30.31 ± 4.02) IU/L, S100β: (0.73 ± 0.17) ng/L vs. (1.13 ± 0.22) ng/L, t = 10.28, 12.12, both P < 0.001). There was a significant difference in the incidence of adverse reactions between the two groups ( P > 0.05). Conclusion:Intravenous thrombolysis combined with Xingnaojing injection for the treatment of cerebral infarction can improve intracranial hemodynamics, reduce the inflammatory response and oxidative stress, and alleviate brain tissue injury. The combined therapy is beneficial to protect the neurological function of patients with cerebral infarction and is highly safe.

Effects of Vitamin D On Cisplatin Induced Heart and Lung Toxicity in Albino Rat

Background: While Cisplatin (CP) is a powerful DNA alkylating agent used to treat many malignancies, its clinical use is linked to a number of negative side effects. It has been proposed that vitamin D can shield biological systems against harm caused by CP. The current study’s objective was to look into how vitamin D protects the rat heart and lung against cisplatin-induced damage. Material and methods: Thirty adult male Albino rats; 180–220 g body weight were allocated into 3 groups; Group I (n=10) receiving saline, Group II (n=10); rats receiving CP (single dose of 6.5 mg/kg intraperitoneal) and Group III (n=10); receiving CP and 50 ng/kg/day alfacalcidol. Results: Alterations included a significant increase in malondialdehyde (MDA) level in the CP group compared with the other groups (p value for comparing between control and each other group, statistically significant at p < 0.05). Histopathologically, CP induced severe changes were observed. However, the CP-induced disturbances significantly improved by treatment with Vitamin D. Conclusion: According to this study, CP treatment significantly harmed rats’ hearts and lungs; however, treatment with vitamin D significantly lessened these harms.

A correlation biomarker between BMI and lipid peroxidation in type 2 diabetes mellitus with and without other complications

Objectives: Body mass index (BMI) is a traditional measurement practice that divides a person’s weight by their height to find out whether they have a healthy range of weight. The objective of this study is to understand the relation between BMI and prevalence of diabetes mellitus, hypertension, and dyslipidemia. Material and Methods: BMI distribution among these patients was compared with and without hypertension and dyslipidemia. The improper of secretion of insulin leads to changes in metabolism of lipids, proteins, and carbohydrates also characterized hyperglycemia generally considered as diabetes mellitus (DM). Results: The excessive formation of free radicals induces oxidative stress, and the antioxidant defense system becomes weaken and hence arises diabetic disorder and overproduction of malondialdehyde (MDA). In cells, the polyunsaturated fatty acid peroxidation is considered as the final product and marker of oxidative stress. Conclusion: In this study, significantly increased BMI is observed in diabetic victims in comparison with control group. A significant positive correlation was noticed between glycated hemoglobin, cholesterol, and MDA. In conclusion, for the prevention and management of vascular complication in type 2 diabetes mellitus, maintaining normal levels of MDA and body weight are very important. Further large-scale studies are required to confirm it

Lipid Peroxidation Status in Embryo Culture Media: The Impact on Fertilization and Embryo Quality during IVF Cycles

Background: The process of preimplantation embryo development in vitro represents a key phase during in vitro fertilization (IVF) cycles. It involves several regulatory signaling pathways as well as an optimized in vitro culture system. The resulting embryo quality helps to determine embryo competence before implantation and pregnancy outcomes. Reactive oxygen species (ROS) are known to play a major role in influencing the process of embryo development. Their role can be reflected in the regulation of signaling pathways as second messengers or in the irreversible cell alterations due to oxidative stress following an excess of ROS levels. Methods: In this study, we investigated the association between morphological embryo quality (fertilization, cleavage quality, and fragmentation levels) and lipid peroxidation levels (Malondialdehyde) in embryo culture media. After intracytoplasmic sperm injection (ICSI), a total of 103 oocytes were evaluated on day 1 and day 3 of their development, and their corresponding culture media were analyzed by estimating MDA levels using thiobarbituric acid. Results: The results showed no significant association between MDA levels in culture media and fertilization rate (p=0.3), sperm quality (p=0.99; p= 0.17; p=0.46; p=0.30; p=0.65; p=0.44; p=0.09; p=0.15; p=0.56), embryo fragmentation levels (p=0.79; p=0.40), AMH levels (p=0.31; p=0.36) and female age (p=0.60; p=0.34). However, we revealed a significant association between cleavage quality and MDA levels in the embryo environment (p=0.03). Conclusion: We conclude that oxidative stress in IVF culture media might be mainly associated with delayed embryonic development.

Effect of electrical stimulation on oxidative stress in tissues in a rat model with incision wound

Electrical stimulation (ES) are known to have beneficial effects in wound healing. However, the effect of electrical stimulation in wound theraphy on the oxidant and antioxidant levels of various tissues in the body remains unclear. Here, we investigated the effects of electrical stimulation on the oxidative stress capacity of tissues in a rat model with a surgical incision wound on the lateral line of the femoral region. Rats divided in two groups: control and ES group. A longitudinal skin incision was made only from the right lateral line of all rats. ES was applied 200 ?s, 20 Hz, 2mA for 20 min during 15 days. Some oxidative stress parameters (malondialdehyde (MDA), reduced glutathione (rGSH), glucose-6-phosphate dehydrogenase (G6PD), glutathione peroxidase (GPx) and catalase (CAT)) in tissues (brain, heart, kidney, liver, testis, gastrocnemius and quadriceps femoris muscle) were obtained spectrophotometrically. The ES reduced oxidative stress by decreasing MDA and simultaneously increasing different antioxidants in different tissues. The results suggest that incision wound could induce oxidative stress in tissues and electrical stimulation post-incision wound may have ameliorative effect.

Oxidative stress in patients with diabetic nephropathy

Background: Diabetic nephropathy (DN) is currently the leading cause of end-stage renal disease globally. Oxidative stress which is classically defined as an event resulting from the magnitude of imbalance between oxidant and antioxidant substances, generated in a setting of oxidation-reduction reactions, and is hypothesized to play a role in the development of diabetic nephropathy. Aim and Objectives: The aim of the study was to assess lipid peroxidation by estimating serum malondialdehyde (MDA) and antioxidant status by assaying paraoxonase-1 (PON-1) in diabetes patients with nephropathy and healthy controls. Furthermore, the study aimed the correlation between MDA and PON-1 levels in patients with diabetic nephropathy. Materials and Methods: A cross-sectional comparative study was conducted in 152 participants, which were divided into two groups as control (n = 76) non-diabetic, healthy, age-, and sex-matched individuals and diabetic patients with nephropathy(n = 76). The study was conducted in Government Medical College, Kozhikode. All the subjects who satisfied the inclusion and exclusion criteria and who gave informed consent were included in a consecutive manner till sample size is achieved. Serum MDA and PON-1 were estimated using spectrophotometry. The data were analyzed using statistical package for the social sciences (SPSS) version 18. Results: Oxidative stress was increased in diabetic nephropathy patients as evidenced by significantly elevated MDA and reduced PON-1 than the normal controls. There was a significant negative correlation of serum MDA with serum PON-1 in patients with diabetic nephropathy. Conclusion: Oxidative stress is an important pathophysiological process for the development of diabetic nephropathy. This study reveals the importance of screening all diabetes patients for oxidative stress. Dietary management and antioxidant supplementation would help them to prevent development of diabetic nephropathy and related complications, which, in turn, improve their quality of life.

The vitamin e consumption effect on muscle damage and oxidative stress: a systematic review and meta-analysis of randomized controlled trials / Efeito da ingestão de vitamina e sobre os danos musculares e o estresse oxidativo: uma revisão sistemática com meta-análise de ensaios controlados randomizados / Efecto del consumo de vitamina e sobre el daño muscular y el estrés oxidativo: una revisión sistemática con metaanálisis de ensayos controlados aleatorios

ABSTRACT Introduction: Vitamin E supplementation may protect against exercise-induced muscle damage (EIMD) through possible inhibition of free radical formation and cell membrane stabilization. However, there is no systematic review of this topic. This fact maintains academic stalemates that may have a resolution. Objective: This systematic review with meta-analysis aims to provide a comprehensive literature review on the hypothesis of the benefit of vitamin E supplementation on oxidative stress and muscle damage induced by aerobic exercise. Methods: A random-effects model was used, weighted mean difference (WMD) and 95% confidence interval (CI) were applied to estimate the overall effect. Results: The results revealed a significant effect of vitamin E supplementation on reducing creatine kinase (CK) and lactate dehydrogenase (LDH). In addition, a subgroup analysis resulted in a significant decrease in CK concentrations in trials with immediate and <24 hours post-exercise CK measurement; <1000 at daily vitamin E intake; ≤1 at weekly intake; 1 at six weeks and >6 weeks experimental duration, studies on aerobic exercise and training were part of the crossover study. Conclusion: Vitamin E can be seen as a priority agent for recovery from muscle damage. Evidence Level II; Therapeutic Studies - Investigating the results.

RESUMO Introdução: A suplementação de vitamina E pode ter um efeito protetor contra danos musculares induzidos pelo exercício (EIMD) através da possível inibição da formação radical livre e estabilização da membrana celular. Todavia, não há uma revisão sistemática sobre esse tema. Tal fato mantém empasses acadêmicos que podem ter uma resolução. Objetivo: Esta revisão sistemática com meta-análise objetiva fornecer uma análise bibliográfica abrangente na hipótese do benefício na suplementação de vitaminas E sobre o estresse oxidativo e os danos musculares induzidos pelo pelo exercício aeróbico. Métodos: Foi utilizado um modelo com efeitos aleatórios, diferença média ponderada (ADM) e intervalo de confiança de 95% (IC) foram aplicados para estimar o efeito geral. Resultados: Os resultados revelaram um efeito significativo da suplementação de vitamina E na redução da creatina-quinase (CK) e lactato-desidrogenase (LDH). Além disso, uma análise do subgrupo resultou em uma diminuição significativa das concentrações de CK em ensaios com medição imediata e <24 horas de CK após o exercício; <1000 no consumo diário de vitamina E; ≤1 no consumo semanal; 1 em 6 semanas e >6 semanas de duração experimental, estudos sobre exercício aeróbico e treinamento fizeram parte do estudo cruzado. Conclusão: A vitamina E pode ser vista como um agente prioritário de recuperação de danos musculares. Nível de evidência II; Estudos Terapêuticos - Investigação de Resultados.

RESUMEN Introducción: La suplementación con vitamina E puede tener un efecto protector contra el daño muscular inducido por el ejercicio (EIMD) a través de la posible inhibición de la formación de radicales libres y la estabilización de la membrana celular. Sin embargo, no existe ninguna revisión sistemática sobre este tema. Este hecho mantiene un impasse académico que puede tener resolución. Objetivo: Esta revisión sistemática con meta-análisis tiene como objetivo proporcionar una amplia revisión de la literatura sobre la hipótesis del beneficio de la suplementación con vitamina E sobre el estrés oxidativo y el daño muscular inducido por el ejercicio aeróbico. Métodos: Se utilizó un modelo de efectos aleatorios, se aplicó la diferencia de medias ponderada (DMP) y el intervalo de confianza (IC) del 95% para estimar el efecto global. Resultados: Los resultados revelaron un efecto significativo de la suplementación con vitamina E en la reducción de la creatina quinasa (CK) y la lactato deshidrogenasa (LDH). Además, un análisis de subgrupos dio como resultado una disminución significativa de las concentraciones de CK en los ensayos con medición de CK inmediata y <24 horas después del ejercicio; <1000 en la ingesta diaria de vitamina E; ≤1 en la ingesta semanal; 1 en 6 semanas y >6 semanas de duración experimental, los estudios sobre el ejercicio aeróbico y el entrenamiento formaron parte del estudio cruzado. Conclusión: La vitamina E puede resultar un agente prioritario para la recuperación del daño muscular. Nivel de evidencia II; Estudios terapéuticos - Investigación de resultados.

RhoA/ROCK-1 Signaling Pathway and Oxidative Stress in Coronary Artery Disease Patients

Abstract Introduction: Coronary artery disease (CAD) is an ischemic condition that occurs as a result of partial or complete interruption of blood flow by narrowing or complete blockage of the vessels supplying the heart, which are called coronary arteries. Our objective in this study is to investigate the RhoA/Rho-associated kinase (ROCK)-1 signaling pathway and oxidative stress in CAD patients. Methods: A total of 81 individuals aged between 40-70 years - including 45 patients (15 females and 30 males) who were admitted to the Artvin State Hospital Cardiovascular Surgery Clinic and were diagnosed with CAD and 36 healthy volunteers (15 females and 21 males) - participated in this study. Serum samples were tested for total cholesterol, triglyceride, low-density lipoprotein, high-density lipoprotein, malondialdehyde (MDA), superoxide dismutase (SOD), RhoA, and ROCK-1 values. Results: Serum RhoA, MDA levels, and ROCK-1 activity in the CAD group were found to be statistically significantly higher than in the control group (P<0.001). Concordantly, serum SOD activity was found to be statistically significantly lower in the CAD group than in the control group (P<0.001). Conclusion: Inhibition of the activity of RhoA/ROCK-1 pathway would be beneficial in treating cardiovascular diseases since this pathway plays an important role in the development of these diseases.

Salivary Tumor Necrosis Factor–Alpha and Malondialdehyde Levels in Children with Class II Malocclusion and Sleep Disorders: An Evaluative Study

Context: Recently biomarkers for sleep disorders have provided an alternative and convenient means of diagnosis for children at risk. Aim: To evaluate salivary TNF?? and Malondialdehyde (MDA) levels in children with skeletal class II malocclusion and with a positive history of sleep disorders. Settings and Design: This prospective evaluative study was carried out from October 2020 to March 2021, in the Department of Pediatric and Preventive Dentistry. Material and Methods: 21 children aged 8?12 years with skeletal class II malocclusion and at least one sleep disorder participated in the study (Group 1). 21 age and gender matched children with no skeletal malocclusion and no reported history of sleep disorders served as a comparison group (Group 2). All children were evaluated regarding their sleep history and clinically examined to determine craniofacial morphology. Unstimulated saliva was collected from all children. Salivary TNF?? was measured with a solid?phase sandwich ELISA. Salivary MDA was measured by using TBA reagent. Statistical Analysis: Intergroup comparison for age and normally distributed data was done using t?test. Comparison of frequencies of categories of variables was done using Chi?square test. Inter group comparison for TNF?? was done using Mann–Whitney U test. Results: There were significantly higher levels of salivary TNF?? and MDA, in children of Group 1 when compared to that of Group 2 children (p < 0.01). Conclusion: Salivary TNF?? and MDA may be a simple and non?invasive tool in the identification and screening of children at high risk for sleep disorders.

Green coffee bean extract attenuates gentamicin induced acute nephrotoxicity in rats / El extracto de grano de café verde atenúa la nefrotoxicidad aguda inducida por gentamicina en ratas

Gentamicin induced acute nephrotoxicity (GIAN) is considered as one of the important causes of acute renal failure. In recent years' great effort has been focused on the introduction of herbal medicine as a novel therapeutic agent for prevention of GIAN. Hence, the current study was designed to investigate the effect of green coffee bean extract (GCBE) on GIAN in rats. Results of the present study showed that rat groups that received oral GCBE for 7 days after induction of GIAN(by a daily intraperitoneal injection of gentamicin for 7days), reported a significant improvement in renal functions tests when compared to the GIAN model groups. Moreover, there was significant amelioration in renal oxidative stress markers (renal malondialdehyde, renal superoxide dismutase) and renal histopathological changes in the GCBE-treated groups when compared to GIAN model group. These results indicate that GCBE has a potential role in ameliorating renal damage involved in GIAN.

La nefrotoxicidad aguda inducida por gentamicina (GIAN) se considera una de las causas importantes de insuficiencia renal aguda. En los últimos años, el gran esfuerzo se ha centrado en la introducción de la medicina herbal como un nuevo agente terapéutico para la prevención de GIAN. Por lo tanto, el estudio actual fue diseñado para investigar el efecto del extracto de grano de café verde (GCBE) sobre la GIAN en ratas. Los resultados del presente estudio mostraron que los grupos de ratas que recibieron GCBE oral durante 7 días después de la inducción de GIAN (mediante una inyección intraperitoneal diaria de gentamicina durante 7 días), informaron una mejora significativa en las pruebas de función renal en comparación con los grupos del modelo GIAN. Además, hubo una mejora significativa en los marcadores de estrés oxidativo renal (malondialdehído renal, superóxido dismutasa renal) y cambios histopatológicos renales en los grupos tratados con GCBE en comparación con el grupo del modelo GIAN. Estos resultados indican que GCBE tiene un papel potencial en la mejora del daño renal involucrado en GIAN.

Antioxidant Effect of Curcumin on the Prevention of Oxidative Damage to the Cochlea in an Ototoxic Rat Model Based on Malondialdehyde Expression

Abstract Introduction Aminoglycoside, as an antimicrobial medication, also has side-effects on the inner ears, bringing about hearing disorders. Curcumin has been proven to be a strong scavenger against various reactive oxygen species (ROS), and the increase in ROS production is considered to play an important role in the process of hearing disorder. Objective To prove that curcumin is an effective antioxidant to prevent cochlear damage based on malondialdehyde (MDA) expression. Methods The present research used 32 Rattus norvegicus, of the Wistar lineage, randomly divided into 8 groups: negative control, ototoxic control (a single dose of 40 mg/ml of gentamicin via intratympanic injection), 2 groups submitted to ototoxic control + curcumin treatment (100 mg/kg, 200 mg/kg), 2 groups who iunderwent ototoxic control + curcumin treatment for 7 days, and two groups submitted to curcumin treatment as prevention for 3 days + ototoxic induction. Results The results showed that the lowest dosage of curcumin (100 mg/kg) could decrease MDA expression on the cochlear fibroblastic wall of the ototoxic model; however using greater doses of curcumin (200 mg/kg) for 7 days would provide a better effect. Curcumin could also significantly decrease MDA expression when it was administered during the preototoxic exposure. Conclusion Curcumin can be used as a therapy for ototoxic prevention based on the decrease in MDA expression.

Effect of floating acupuncture therapy on refractory pressure ulcer and its effects on serum levels of superoxide dismutase, malondialdehyde and insulin-like growth factor-1 / 中国基层医药

Objective:To investigate the efficacy of floating acupuncture therapy in the treatment of chronic refractory pressure ulcers and its effects on serum levels of superoxide dismutase, malondialdehyde and insulin-like growth factor-1.Methods:A total of 60 patients with chronic refractory pressure ulcers who received treatment in The Second Hospital of Jiaxing from October 2019 to October 2021 were included in this study. They were randomly divided into observation and control groups, with 30 patients in each group. The patients in the control group were given routine treatment, while the patients in the observation group were given floating acupuncture therapy based on routine treatment. Clinical efficacy, wound healing rate after 7, 14 and 21 days of treatment, the time of emerging granulation tissue, the time of shedding rotten meat, and the time of wound healing, changes in serum levels of superoxide dismutase, malondialdehyde and insulin-like growth factor-1 after 21 days of treatment relative to those before treatment were compared between the two groups.Results:Total response rate in the observation group was significantly higher than that in the control group [90.0% (27/30) vs. 66.7% (20/30), χ2 = 4.81, P < 0.05]. Wound healing rate after 7, 14 and 21 days of treatment in the observation group was significantly higher than that in the control group ( t = -5.45, -7.77, -7.51, all P < 0.001). The time of emerging granulation tissue, the time of shedding rotten meat, and the time of wound healing in the observation group were significantly shorter than those in the control group ( t = 5.69, 9.26, 8.91, all P < 0.001). After 21 days of treatment, serum levels of superoxide dismutase, malondialdehyde and insulin-like growth factor-1 in the observation group were (96.52 ± 10.43) U/mL, (4.32 ± 0.78) μmol/L, (43.52 ± 8.29) μg/L, respectively, which were significantly different from (83.76 ± 6.81) U/mL, (5.48 ± 0.92) μmol/L, (36.78 ± 9.18) ng/mL, in the control group ( t = 5.61, 5.27, 2.98, all P < 0.05). Conclusion:Floating acupuncture therapy is effective in the treatment of refractory pressure ulcer. It can accelerate wound healing, increase serum superoxide dismutase and insulin-like growth factor-1 levels, and decrease serum malondialdehyde level.