Lipid peroxidation in brain tissue in vitro: Antioxidant effects of barbiturates

ABSTRACT To provide an outlook of the various available methods of antioxidant activity. Various available in vitro and in vivo methods are listed and the procedure to perform the method, its mechanism is also explained in brief. 1,1-diphenyl-2-picrylhydrazyl method was found to be used mostly for the in vitro antioxidant activity evaluation purpose while lipid peroxidation was found as mostly used in vivo antioxidant assay. An ethanol was with the highest frequency as a solvent for extraction purpose. Summarized information on the various methods available provides with reliable information to confirm the benefits of antioxidant effects. Keywords: Antioxidant activity, Reactive oxygen species, Free radical, 1,1-diphenyl-2-picrylhydrazyl, Flavonoid.

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Scavestrogen sulfamates: correlation between estrone sulfatase inhibiting and antioxidant effects

Canadian Journal of Physiology and Pharmacology ◽

10.1139/y98-005 ◽

1998 ◽

Vol 76 (2) ◽

pp. 99-109 ◽

Cited By ~ 6

Author(s):

Wolfgang Römer ◽

Michael Oettel ◽

Sigfrid Schwarz

Keyword(s):

Lipid Peroxidation ◽

Superoxide Anion ◽

Helix Pomatia ◽

Radical Scavenging ◽

Redox Chemistry ◽

Estrone Sulfatase ◽

Arylsulfatase B ◽

Iron Redox ◽

Antioxidant Effects

In the present study estrone sulfatase (steryl-sulfatase; EC 3.1.6.2) and phenylsulfatase (arylsulfatase B; EC 3.1.6.1) inhibiting as well as antioxidant effects exerted by ring B,C unsaturated sulfamates of estrone (J 1025), 17 beta -estradiol (J 1054, J 1059, J 1067), and 17 alpha -estradiol (J 1051, J 1064, J 1065) were examined as compared with their parent compounds, J 994, J 995, and J 1050, using six different in vitro models: (i) estrone sulfatase activity in human placental microsomes, (ii) phenylsulfatase activity isolated from Helix pomatia, (iii) Fenton reaction driven lipid peroxidation in rat synaptosomes, (iv) Fe(II)-chelating activities, (v) formation of superoxide anion radicals, and (vi) total antioxidative activities. Ring B,C unsaturated estrogen (so-called scavestrogen) sulfamates were found to act as potent inhibitors of the following enzyme activities and generated radicals: estrone sulfatase, phenylsulfatase, lipid peroxyl, and superoxide anion. In addition, scavestrogen sulfamates were able to influence the iron redox chemistry and total antioxidative activities. These findings indicate that relatively minor modifications in the chemical structure of classical steroid sulfamates can preserve or enhance their estrone sulfatase inhibiting properties and, simultaneously, amplify their antioxidant capacity to a great extent. Taken together, our data suggest that scavestrogen sulfamates such as J 1025, J 1051, or J 1054 (17 beta -dihydroequilenin sulfamate) may serve as a very promising basis for the development of steroid-derived estrone sulfate - sulfatase inhibitors characterized by promising estrone sulfatase inhibiting activities in combination with a "good" antioxidant potency.Key words: estrogen 3-O-sulfamates, estrone sulfatase, phenylsulfatase, lipid peroxidation, iron redox chemistry, human placental microsomes, radical scavenging effects.

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In vitro Inhibitory Effects of Cyperus esculentus L. (Tiger Nut) Tubers on some Enzymes Associated with Neurodegeneration and Iron- Induced Lipid Peroxidation in Rats’ Brain Tissue Homogenate

NIgerian Journal of Neuroscience ◽

10.47081/njn2020.11.2/004 ◽

2020 ◽

Vol 11 (2) ◽

pp. 81-87

Author(s):

Ayodeji Olabiyi ◽

Keyword(s):

Lipid Peroxidation ◽

Brain Tissue ◽

Radical Scavenging ◽

Inhibitory Effect ◽

Tissue Homogenate ◽

Cyperus Esculentus ◽

Butyryl Cholinesterase ◽

Radical Scavenging Ability ◽

Brain Tissue Homogenate

This study investigated the inhibitory effect of Cyperus esculentus L. (raw and processed) tubers on Iron (Fe2+) induced lipid peroxidation and key enzymes linked with neurodegeneration in vitro. Ten grams of tiger nut tubers was weighed and added to 100 mL of distilled water (1:10 w/v), left for 24 h, filtered, centrifuged to obtain a clear supernatant and lyophilized. Activities of acetyl cholinesterase (AChE), butyryl cholinesterase (BChE), Fe2+-induced lipid peroxidation as well as antioxidants status as indicated by 2,2-azino-bis (3-ethylbenthiazoline-6-sulphonic acid radical scavenging ability and Fe chelation were evaluated. Raw tiger nut extracts inhibited activities of AChE and BChE in the brain tissue of rats (0 – 11.54 mg /mL) with EC50 = 3.599 mg /mL and 2.71 ± 0.01 mg /mL respectively, and increased antioxidant activity when compared with the processed tuber. Inhibition on these enzymes as well as prevention of Fe2+ induced lipid peroxidation may be the possible mechanism of action by which tiger nut prevents neurodegeneration.

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Inhibitory Effects of Different Barbiturates on Lipid Peroxidation in Brain Tissue in Vitro

Anesthesiology ◽

10.1097/00000542-198009000-00002 ◽

1980 ◽

Vol 53 (3) ◽

pp. 186-194 ◽

Cited By ~ 62

Author(s):

David S. Smith ◽

Stig Rehncrona ◽

Bo K. Siesjö

Keyword(s):

Lipid Peroxidation ◽

Brain Tissue ◽

Inhibitory Effects

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Faculty Opinions recommendation of Determination of the EC50 amnesic concentration of etomidate and its diffusion profile in brain tissue: implications for in vitro studies.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1059770.511698 ◽

2007 ◽

Author(s):

Bernd Antkowiak

Keyword(s):

Brain Tissue ◽

Diffusion Profile ◽

In Vitro Studies

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Association between Vitamins and Minerals with Antioxidant Effects and Coronary Artery Calcification in Adults and Older Adults: A Systematic Review

Current Pharmaceutical Design ◽

10.2174/1381612825666190722101954 ◽

2019 ◽

Vol 25 (22) ◽

pp. 2474-2479 ◽

Cited By ~ 1

Author(s):

Alisson Diego Machado ◽

Gustavo Rosa Gentil Andrade ◽

Jéssica Levy ◽

Sara Silva Ferreira ◽

Dirce Maria Marchioni

Keyword(s):

Systematic Review ◽

Older Adults ◽

Coronary Artery ◽

Coronary Artery Calcification ◽

Serum Levels ◽

Antioxidant Compounds ◽

Increased Risk ◽

Coronary Events ◽

Antioxidant Effects

Background: Coronary Artery Calcification (CAC) is considered an important cardiovascular risk factor. There is evidence that CAC is associated with an increased risk of atherosclerosis, coronary events and cardiovascular mortality. Inflammation is one of the factors associated with CAC and despite the interest in antioxidant compounds that can prevent CAC, its association with antioxidants remains unclear. Objective: This study aimed to systematically review the association between vitamins and minerals with antioxidant effects and CAC in adults and older adults. Methods: We conducted a systematic review using PubMed for articles published until October 2018. We included studies conducted in subjects aged 18 years and older with no previous cardiovascular disease. Studies involving animal or in vitro experiments and the ones that did not use reference methods to assess the CAC, dietary intake or serum levels of vitamin or mineral were excluded. Results: The search yielded 390 articles. After removal of duplicates, articles not related to the review, review articles, editorials, hypothesis articles and application of the inclusion and exclusion criteria, 9 articles remained. The results of the studies included in this systematic review suggest that magnesium is inversely associated with CAC and results on the association between CAC and vitamin E have been conflicting. Conclusion: Additional prospective studies are needed to elucidate the role of these micronutrients on CAC.

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Monocytes as Carriers of Magnetic Nanoparticles for Tracking Inflammation in the Epileptic Rat Brain

Current Drug Delivery ◽

10.2174/1567201816666190619122456 ◽

2019 ◽

Vol 16 (7) ◽

pp. 637-644 ◽

Cited By ~ 4

Author(s):

Hadas Han ◽

Sara Eyal ◽

Emma Portnoy ◽

Aniv Mann ◽

Miriam Shmuel ◽

...

Keyword(s):

Brain Tissue ◽

Ex Vivo ◽

In Vivo Studies ◽

Nanoparticle Distribution ◽

Spontaneous Seizures ◽

Systemic Distribution ◽

Hippocampal Ca1 ◽

Pilocarpine Model

Background: Inflammation is a hallmark of epileptogenic brain tissue. Previously, we have shown that inflammation in epilepsy can be delineated using systemically-injected fluorescent and magnetite- laden nanoparticles. Suggested mechanisms included distribution of free nanoparticles across a compromised blood-brain barrier or their transfer by monocytes that infiltrate the epileptic brain. Objective: In the current study, we evaluated monocytes as vehicles that deliver nanoparticles into the epileptic brain. We also assessed the effect of epilepsy on the systemic distribution of nanoparticleloaded monocytes. Methods: The in vitro uptake of 300-nm nanoparticles labeled with magnetite and BODIPY (for optical imaging) was evaluated using rat monocytes and fluorescence detection. For in vivo studies we used the rat lithium-pilocarpine model of temporal lobe epilepsy. In vivo nanoparticle distribution was evaluated using immunohistochemistry. Results: 89% of nanoparticle loading into rat monocytes was accomplished within 8 hours, enabling overnight nanoparticle loading ex vivo. The dose-normalized distribution of nanoparticle-loaded monocytes into the hippocampal CA1 and dentate gyrus of rats with spontaneous seizures was 176-fold and 380-fold higher compared to the free nanoparticles (p<0.05). Seizures were associated with greater nanoparticle accumulation within the liver and the spleen (p<0.05). Conclusion: Nanoparticle-loaded monocytes are attracted to epileptogenic brain tissue and may be used for labeling or targeting it, while significantly reducing the systemic dose of potentially toxic compounds. The effect of seizures on monocyte biodistribution should be further explored to better understand the systemic effects of epilepsy.

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Chemosensitizing Activity of Histone Deacetylases Inhibitory Cyclic Hydroxamic Acids for Combination Chemotherapy of Lymphatic Leukemia

Current Cancer Drug Targets ◽

10.2174/1568009617666170623104030 ◽

2018 ◽

Vol 18 (4) ◽

pp. 365-371 ◽

Cited By ~ 2

Author(s):

Denis V. Mishchenko ◽

Margarita E. Neganova ◽

Elena N. Klimanova ◽

Tatyana E. Sashenkova ◽

Sergey G. Klochkov ◽

...

Keyword(s):

Lipid Peroxidation ◽

Acute Toxicity ◽

Histone Deacetylases ◽

Hydroxamic Acids ◽

Water Soluble ◽

Male Rat ◽

Hybrid Male ◽

Cyclic Hydroxamic Acids

Background: Anti-tumor effect of hydroxamic acid derivatives is largely connected with its properties as efficient inhibitors of histone deacetylases, and other metalloenzymes involved in carcinogenesis. Objective: The work was aimed to (i) determine the anti-tumor and chemosensitizing activity of the novel racemic spirocyclic hydroxamic acids using experimental drug sensitive leukemia P388 of mice, and (ii) determine the structure-activity relationships as metal chelating and HDAC inhibitory agents. Method: Outbreed male rat of 200-220 g weights were used in biochemical experiments. In vivo experiments were performed using the BDF1 hybrid male mice of 22-24 g weight. Lipid peroxidation, Fe (II) -chelating activity, HDAC fluorescent activity, anti-tumor and anti-metastatic activity, acute toxicity techniques were used in this study. Results: Chemosensitizing properties of water soluble cyclic hydroxamic acids (CHA) are evaluated using in vitro activities and in vivo methods and found significant results. These compounds possess iron (II) chelating properties, and slightly inhibit lipid peroxidation. CHA prepared from triacetonamine (1a-e) are more effective Fe (II) ions cheaters, as compared to CHA prepared from 1- methylpiperidone (2a-e). The histone deacetylase (HDAC) inhibitory activity, lipophilicity and acute toxicity were influenced by the length amino acids (size) (Glycine < Alanine < Valine < Leucine < Phenylalanine). All compounds bearing spiro-N-methylpiperidine ring (2a-e) are non-toxic up to 1250 mg/kg dose, while compounds bearing spiro-tetramethylpiperidine ring (1a-e) exhibit moderate toxicity which increases with increasing lipophility, but not excite at 400 mg/kg. Conclusion: It was shown that the use of combination of non-toxic doses of cisplatin (cPt) or cyclophosphamide with CHA in most cases result in the appearance of a considerable anti-tumor effect of cytostatics. The highest chemosensitizing activity with respect to leukemia Р388 is demonstrated by the CHA derivatives of Valine 1c or 2c.

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