Effects of X-Ray Radiation on Lipid Peroxidation and Antioxidant Systems in Rabbits Treated with Antioxidant Compounds

2003 ◽  
Vol 94 (2) ◽  
pp. 149-156 ◽  
Author(s):  
Y. Deger ◽  
S. Dede ◽  
A. Belge ◽  
N. Mert ◽  
T. Kahraman ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Antioxidant Systems ◽  
Antioxidant Compounds ◽  
X Ray

scholarly journals Comparison of coenzyme Q10 or fish oil for prevention of intermittent hypoxia-induced oxidative injury in neonatal rat lungs

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Christina D’Agrosa ◽  
Charles L. Cai ◽  
Faisal Siddiqui ◽  
Karen Deslouches ◽  
Stephen Wadowski ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Lung Injury ◽  
Fish Oil ◽  
Coenzyme Q10 ◽  
Intermittent Hypoxia ◽  
Oxidative Injury ◽  
Adverse Outcomes ◽  
Neonatal Rat ◽  
Antioxidant Systems

Abstract Background Neonatal intermittent hypoxia (IH) results in oxidative distress in preterm infants with immature antioxidant systems, contributing to lung injury. Coenzyme Q10 (CoQ10) and fish oil protect against oxidative injury. We tested the hypothesis that CoQ10 is more effective than fish oil for prevention of IH-induced lung injury in neonatal rats. Methods Newborn rats were exposed to two clinically relevant IH paradigms at birth (P0): (1) 50% O2 with brief hypoxia (12% O2); or (2) room air (RA) with brief hypoxia (12% O2), until P14 during which they were supplemented with daily oral CoQ10, fish oil, or olive oil from P0 to P14. Pups were studied at P14 or placed in RA until P21 with no further treatment. Lungs were assessed for histopathology and morphometry; biomarkers of oxidative stress and lipid peroxidation; and antioxidants. Results Of the two neonatal IH paradigms 21%/12% O2 IH resulted in the most severe outcomes, evidenced by histopathology and morphometry. CoQ10 was effective for preserving lung architecture and reduction of IH-induced oxidative stress biomarkers. In contrast, fish oil resulted in significant adverse outcomes including oversimplified alveoli, hemorrhage, reduced secondary crest formation and thickened septae. This was associated with elevated oxidants and antioxidants activities. Conclusions Data suggest that higher FiO2 may be needed between IH episodes to curtail the damaging effects of IH, and to provide the lungs with necessary respite. The negative outcomes with fish oil supplementation suggest oxidative stress-induced lipid peroxidation.

Expression Analysis of 4-Hydroxynonenal Modified Proteins in Schizophrenia Brain; Relevance to Involvement in Redox Dysregulation

2021 ◽  
Vol 18 ◽  
Author(s):  
Sobia Manzoor ◽  
Ayesha Khan ◽  
Beena Hasan ◽  
Shamim Mushtaq ◽  
Nikhat Ahmed
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Thiobarbituric Acid ◽  
Brain Regions ◽  
Protein Adducts ◽  
Antioxidant Systems ◽  
Control Group ◽  
Tbars Level ◽  
Elevated Expression ◽  
Modified Proteins

Background: Oxidative damage contributes to the pathophysiology of schizophrenia (SZ). Redox imbalance may lead to increased lipid peroxidation, which produces toxic aldehydes like 4-hydroxynonenal (4-HNE) ultimately leading to oxidative stress. Conversely, implications of oxidative stress points towards an alteration in HNE-protein adducts and activities of enzymatic and antioxidant systems in schizophrenia. Objectives: Present study focuses on identification of HNE-protein adducts and its related molecular consequences in schizophrenia pathology due to oxidative stress, particularly lipid peroxidation. Material and Methods: Oxyblotting was performed on seven autopsied brain samples each from cortex and hippocampus region of schizophrenia patients and their respective normal healthy controls. Additionally, thiobarbituric acid substances (TBARS), reduced glutathione (GSH) levels and catalase (CAT) activities associated with oxidative stress, were also estimated. Results: Obtained results indicates substantially higher levels of oxidative stress in schizophrenia patients than healthy control group represented by elevated expression of HNE-protein adducts. Interestingly, hippocampus region of schizophrenia brain shows increased HNE protein adducts compared to cortex. An increase in catalase activity (4.8876 ± 1.7123) whereas decrease in antioxidant GSH levels (0.213 ± 0.015µmol/ml) have been observed in SZ brain. Elevated TBARS level (0.3801 ± 0.0532ug/ml) were obtained in brain regions SZ patients compared with their controls that reflects an increased lipid peroxidation (LPO). Conclusion: Conclusion: We propose the role of HNE modified proteins possibly associated with the pathology of schizophrenia. Our data revealed increase lipid peroxidation as a consequence of increased TBARS production. Furthermore, altered cellular antioxidants pathways related to GSH and CAT also highlight the involvement of oxidative stress in schizophrenia pathology.

scholarly journals Mechanisms of Response to Salt Stress in Oleander (Nerium oleander L.)

2016 ◽  
Vol 73 (2) ◽  
pp. 249
Author(s):  
Dinesh Kumar ◽  
Mohamad Al Hassan ◽  
Oscar Vicente ◽  
Veena Agrawal ◽  
Monica Boscaiu
Keyword(s):  
Salt Stress ◽  
Abiotic Stress Tolerance ◽  
Soluble Sugar ◽  
Soluble Sugars ◽  
Nerium Oleander ◽  
Antioxidant Systems ◽  
Change Scenario ◽  
Antioxidant Compounds ◽  
Stress Dependent

Elucidating the mechanisms of abiotic stress tolerance in different species will help to develop more resistant plant varieties, contributing to improve agricultural production in a climate change scenario. Basic responses to salt stress, dependent on osmolyte accumulation and activation of antioxidant systems, have been studied in Nerium oleander, a xerophytic species widely used as ornamental. Salt strongly inhibited growth, but the plants survived one-month treatments with quite high NaCl concentrations, up to 800 mM, indicating the the species is relatively resistant to salt stress, in addition to drought. Levels of proline, glycine betaine and soluble sugars increased only slightly in the presence of salt; however, soluble sugar absolute contents were much higher than those of the other osmolytes, suggesting a functional role of these compounds in osmotic adjustment, and the presence of constitutive mechanisms of response to salt stress. High salinity generated oxidative stress in the plants, as shown by the increase of malondialdehyde levels. Antioxidant systems, enzymatic and non-enzymatic, are generally activated in response to salt stress; in oleander, they do not seem to include total phenolics or flavonoids, antioxidant compounds which did not accumulate significantly in salt-trated plants

scholarly journals THE STATE OF THE ANTIOXIDANT SYSTEM OF THE INTERNAL ORGANS IN RATS DURING BURN DISEASE

2014 ◽  
Vol 13 (3) ◽  
pp. 51-55
Author(s):  
L. G. Netyukhailo ◽  
T. A. Sukhomlin ◽  
Ya. A. Basarab ◽  
V. V. Bondarenko ◽  
S. V. Kharchenko
Keyword(s):  
Lipid Peroxidation ◽  
Superoxide Dismutase ◽  
Free Radical ◽  
Salivary Glands ◽  
Antioxidant System ◽  
The State ◽  
Antioxidant Systems ◽  
Free Radical Processes ◽  
Burn Disease ◽  
Radical Processes

The objective of research was to study the state of prooxidant and antioxidant systems in the tissues of the lungs, kidneys, pancreas and salivary glands at burn disease. The intensity of the free radical processes was evaluated on the basis of the content of malondialdehyde (MDA) and antioxidant system – based on the indexes of its enzymatic chain: superoxide dismutase and catalase in homogenates of the studied organs. It has been found that changes in experimental burn disease depend on the studied organs and the stage of burn disease. The activation of free radical processes observed in all investigated organs (lungs, kidneys, pancreas and salivary glands). Reactive oxygen species induce lipid peroxidation, which is a universal marker of tissue damage. MDA appears in the body during degradation of polyunsaturated fatty acids and it’s a marker of lipid peroxidation and oxidative stress. It was found the increasing of MDA in all organs, especially in the lungs and kidneys at stage of burn shock. Under these conditions it was observed the decrease of superoxide dismutase and catalase in all investigated organs. At burn disease there is development of disbalance between the action of prooxidant and antioxidant systems due to the activation of free radical processes.

scholarly journals Oxidative stress in ageing

2017 ◽  
Vol 5 (11) ◽  
pp. 4826 ◽  
Author(s):  
Fasna K. A. ◽  
Geetha N. ◽  
Jean Maliekkal
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Free Radicals ◽  
Free Radical ◽  
Age Groups ◽  
The Body ◽  
Antioxidant Systems ◽  
Lipid Peroxidation Product ◽  
Free Radical Theory ◽  
Radical Theory

Background: Ageing is characterized by a gradual decline in body functions and decreased ability to maintain homeostasis. The free radical theory of ageing proposed by Harman D states that ageing is a result of cumulative damage incurred by free radical reactions. Free radicals are highly reactive molecular species with unpaired electrons; generated in the body by several physiological processes. Prime target to free radical attack are the polyunsaturated fatty acids of cell membranes causing lipid peroxidation. The free radicals are neutralized by the exogenous and endogenous antioxidant systems. Oxidative stress occurs when large number of free radicals are produced or the antioxidant activity is impaired. The present study is focused to find out the role of oxidative stress in ageing.Methods: A cross sectional observational study was undertaken to assess the oxidative stress in ageing; by determining the levels of lipid peroxidation product- malondialdehyde (MDA), the antioxidants- superoxide dismutase (SOD) and ceruloplasmin in various age groups. 150 healthy subjects were selected randomly and categorised into three different age groups of 20-30 years, 40-59 years and 60-90 years; with 50 subjects in each group. Results were expressed as mean ± standard deviation.Results: a significant elevation in serum MDA level and a decline in SOD were observed in 40-59 years and 60-90 years age groups. However, an elevated ceruloplasmin level was found in the above age groups.Conclusions: Aforementioned observations are suggestive of an association between oxidative stress and the progression of ageing process.

INFLUENCE OF INTEGRATED APPLICATION OF LASER THERAPY AND LOW-FREQUENCY ELECTROSTATIC FIELD ON BIOCHEMICAL INDICATORS OF ORAL FLUID IN PATIENTS WITH POSTPROTHETIC INFLAMMATORY COMPLICATIONS DURING DENTAL IMPLANTATION

2021 ◽  
pp. 8-17
Author(s):  
Варвара Ильинична Лившиц ◽  
Сергей Николаевич Нагорнев ◽  
Валерий Константинович Фролков ◽  
Галина Анатольевна Пузырева
Keyword(s):  
Lipid Peroxidation ◽  
Laser Therapy ◽  
Oral Fluid ◽  
Dynamic Balance ◽  
Low Frequency ◽  
Clinical State ◽  
Antioxidant Systems ◽  
Physical Factors ◽  
Dental Implantation ◽  
Close Relationship

В статье представлен анализ процессов липопероксидации в ротовой жидкости у пациентов с дентальными периимплантитами при курсовом применении низкоинтенсивной инфракрасной лазеротерапии и низкочастотной электростатической терапии. Полученные результаты позволяют заключить, что развитие воспалительных осложнений, возникающих у пациентов с ортопедическими конструкциями на дентальных имплантатах, характеризуются развитием окислительного стресса, нарушающим динамическое равновесие между про- и антиоксидантными системами. Применение физиотерапевтических факторов (лазера и низкочастотной электротерапии) оказывает выраженное антиоксидантное действие, реализуемое на основе потенцирующего механизма взаимодействия физических факторов и направленное на повышение резервной мощности защитных факторов ротовой жидкости и поддержание окислительного гомеостаза в условиях физиологического равновесия. Установлено, что позитивные сдвиги параметров липопероксидации тесно коррелируют с индексными показателями клинического состояния пациентов, что убедительно свидетельствует не только о патогенетической значимости процессов ПОЛ в развитии постпротетических воспалительных осложнений при дентальной имплантации, но и важности антиоксидантных потенций проводимых лечебных мероприятий в достижении клинической эффективности. Тесная взаимосвязь коэффициента стабильности дентального имплантата с продуктами ПОЛ характеризует собой деструктивное участие липоперекисных процессов в формировании морфологической основы остеоинтеграции имплантатов, а также позволяет рассматривать параметры перекисного метаболизма и значения коэффициента антиоксидантной защиты в качестве информативных индикаторов мониторинга и прогноза устойчивости внутрикостных дентальных конструкций The article presents an analysis of lipid peroxidation processes in the oral fluid in patients with dental peri-implantitis during the course of low-intensity infrared laser therapy and low-frequency electrostatic therapy. The results obtained allow us to conclude that the development of inflammatory complications arising in patients with orthopedic constructions on dental implants are characterized by the development of oxidative stress, which disrupts the dynamic balance between pro- and antioxidant systems. The use of physiotherapeutic factors (laser and low-frequency electrotherapy) has a pronounced antioxidant effect, realized on the basis of a potentiating mechanism of interaction of physical factors and aimed at increasing the reserve power of the protective factors of the oral fluid and maintaining oxidative homeostasis in conditions of physiological equilibrium. It has been established that positive shifts in lipid peroxidation parameters closely correlate with index indicators of the clinical state of patients, which convincingly indicates not only the pathogenetic significance of LPO processes in the development of postprotective inflammatory complications during dental implantation, but also the importance of antioxidant potencies of the therapeutic measures in achieving clinical efficacy. The close relationship of the coefficient of stability of a dental implant with LPO products characterizes the destructive participation of lipoperoxide processes in the formation of the morphological basis of osseointegration of implants, and also allows us to consider the parameters of peroxide metabolism and the value of the coefficient of antioxidant protection as informative indicators for monitoring and predicting the stability of intraosseous dental structures

Disassociation of oxidant-induced ATP depletion and DNA damage from early cytotoxicity in LLC-PK1 cells

1997 ◽  
Vol 272 (6) ◽  
pp. F729-F735 ◽  
Author(s):  
S. P. Andreoli ◽  
C. P. Mallett
Keyword(s):  
Hydrogen Peroxide ◽  
Lipid Peroxidation ◽  
Dna Damage ◽  
Oxidant Stress ◽  
Atp Depletion ◽  
Antioxidant Compounds ◽  
Tubular Epithelial Cells ◽  
Renal Tubular Epithelial Cells ◽  
Stressed Cells ◽  
Renal Tubular

To determine the mechanism(s) of oxidant-mediated cell lysis in renal tubular epithelial cells, we determined ATP depletion, DNA damage, lipid peroxidation, and cytotoxicity in LLC-PK1 cells exposed to 500 microM hydrogen peroxide for 1 h with and without inhibitors of lipid peroxidation including a lazaroid compound, 2-methylaminochroman (2-MAC), and Trolox, a vitamin E analog. ATP levels were determined by luciferin-luciferase, DNA damage by the alkaline unwinding technique, lipid peroxidation by the generation of malondialdehyde, and early cytotoxicity (5 h) by the release of 51Cr, whereas late cytotoxicity (24 h) was determined by release of [3H]leucine from prelabeled cells. Cells exposed to 500 microM hydrogen peroxide demonstrated significant (P < 0.01) ATP depletion, DNA damage, and lipid peroxidation, followed by cell death at 5 h. Concentrations of 0.1–25 microM 2-MAC or 25–500 microM Trolox each markedly and significantly (P < 0.01) inhibited lipid peroxidation and early cytotoxicity but had little to no effect on ATP depletion or DNA damage. Thus oxidant-stressed cells remained intact for several hours despite significant ATP depletion and DNA damage when lipid peroxidation was inhibited with the antioxidant compounds. At 24 h, 2-MAG and Trolox had lost their protective effect, suggesting that mechanisms other than lipid peroxidation play a role in later cytotoxicity. We conclude that ATP depletion and DNA damage are not the primary mediators of early cytotoxicity following oxidant stress, whereas lipid peroxidation plays an central role in mediating early cytotoxicity following oxidant injury.

Influence of commonly used clinical antidotes on antioxidant systems in human hepatocyte culture intoxicated with α-amanitin

2010 ◽  
Vol 30 (1) ◽  
pp. 38-43 ◽  
Author(s):  
Jan Magdalan ◽  
Aleksandra Piotrowska ◽  
Agnieszka Gomułkiewicz ◽  
Tomasz Sozański ◽  
Adam Szeląg ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Culture Medium ◽  
Antioxidant Properties ◽  
Human Hepatocyte ◽  
Hepatocyte Culture ◽  
Antioxidant Systems ◽  
Effective Protection ◽  
Sod Activity ◽  
Severe Hepatotoxicity ◽  
Primary Mechanism

α-Amanitin (α-AMA) is the main toxin of Amanita phalloides and its subspecies (A. virosa and A. verna). The primary mechanism of α-AMA toxicity is associated with protein synthesis blocking in hepatocytes. Additionally, α-AMA exhibits prooxidant properties that may contribute to its severe hepatotoxicity. The aim of the present study was to assess the effect of α-AMA on lipid peroxidation and the activities of superoxide dismutase (SOD) and catalase (CAT) in human hepatocyte culture. The effects of benzylpenicillin (BPCN), N-acetyl-L-cysteine (ACC), and silibinin (SIL) on SOD and CAT activities and on lipid peroxidation in human hepatocyte culture intoxicated with α-AMA were also examined. In human hepatocyte culture, 48-hour exposure to α-AMA at a 2-μM concentration caused an increase in SOD activity, a reduction of CAT activity, and a significant increase in lipid peroxidation. Changes in SOD and CAT activity caused by α-AMA could probably enhance lipid peroxidation by increased generation of hydrogen peroxide combined with reduced detoxification of that oxygen radical. The addition of antidotes (ACC or SIL) to the culture medium provided more effective protection against lipid peroxidation in human hepatocytes intoxicated with α-AMA than the addition of BPCN, possessing no antioxidant properties.

A Study on the Antioxidant Activity and Tissues Selective Inhibition of Lipid Peroxidation by Saponins from the Roots of Platycodon grandiflorum

2009 ◽  
Vol 37 (05) ◽  
pp. 967-975 ◽  
Author(s):  
Xian-Jun Fu ◽  
Hong-Bing Liu ◽  
Peng Wang ◽  
Hua-Shi Guan
Keyword(s):  
Lipid Peroxidation ◽  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Selective Inhibition ◽  
Antioxidant Systems ◽  
Platycodon Grandiflorum ◽  
Platycodi Radix ◽  
Antioxidant Effects ◽  
Different Tissues ◽  
Selective Effects

Platycodi Radix is the root of Platycodon grandiflorum (Jacq.) A. DC and has been used as a traditional medicine in China. According to the theory of traditional Chinese medicine, Platycodi Radix (PR) possesses the character of lung meridian tropism (Guijing) and has selective effects on the lung and respiratory system. The aim of this study was to confirm the antioxidant effects of saponins from Platycodi Radix (PRS), with emphasis on its selective inhibition of lipid peroxidation in different tissues. The hydroxyl radical scavenging activity was determined by a H2O2/Fe2+ system; a modified thiobarbituric acid reactive species assay was used to measure the lipid peroxide in rats' tissues. These antioxidant activities were compared to ascorbic acid (Vc). The results showed that PRS had antioxidant activities in various antioxidant systems. And the inhibition capability of lipid peroxidation of PRS and Vc were excellent, but differed greatly in different tissues. These results suggested that PRS had antioxidant effects and selective inhibition of lipid peroxidation. It indicated that the mechanism of Platycodi Radix to treat some diseases might be related to its antioxidant activity, especially its tissue selective effects. However, further study is needed.

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