Ebenezer Morayo Ale , Steve Osagie Asuelimen , Victoria Ifeoluwa Ayo , Mgbede Joy Timothy , Isaac John Umaru , Ebenezer Kayode Toluwalase
{"title":"Effect OF m-trifluoromethyl- attachment on the glutathione peroxidase mimicry and antioxidant actions of diphenyl diselenide: Essential thiols of electrogenic sodium pump as a mechanistic component","authors":"Ebenezer Morayo Ale , Steve Osagie Asuelimen , Victoria Ifeoluwa Ayo , Mgbede Joy Timothy , Isaac John Umaru , Ebenezer Kayode Toluwalase","doi":"10.1016/j.arres.2023.100092","DOIUrl":"10.1016/j.arres.2023.100092","url":null,"abstract":"<div><p><em>m</em>-Ditrifluoromethyl-diphenyl diselenide [DFDD (<em>m-</em>CF<sub>3</sub>-C<sub>6</sub>H<sub>4</sub>Se)<sub>2</sub>] is a disubstituted diaryl analog of diphenyl diselenide [DPDS (C<sub>6</sub>H<sub>5</sub>Se)<sub>2</sub>] in which a hydrogen atom on each aromatic ring is replaced by trifluoromethyl group (-CF<sub>3</sub>). Herein, we investigated the effect of the -CF<sub>3</sub> group introduction on the GPx mimetic and antioxidant properties of DPDS. Animals were euthanized, brains were removed, and used for lipid peroxidation, cerebral sodium pump activity and thiols assays <em>in vitro</em>. Results showed that DFDD utilizes exogenous thiols [dithiol treitol (DTT), cysteine (Cys) and glutathione (GSH)] to reduce hydroperoxides. Furthermore, DFDD only protected against deoxyribose degradation in the presence of DTT. DFDD also exerted marked (<em>p</em>< 0.05) inhibitory effect on Fe<sup>2+</sup>or H<sub>2</sub>O<sub>2</sub> or fenton reaction-induced lipid peroxidation in rat cerebral tissue homogenate. In addition, DFDD simultaneously (<em>p</em>< 0.05) inhibited pump activity and lipid peroxidation in cerebral tissue homogenate assaulted with prooxidants with proportionate depletion of thiol in the reaction system. This assay was repeated in the presence of DTT or Cys-or GSH and results revealed that enzyme's activity was not inhibited indicating that DFDD switched from enzymes's thiols to the oxidation of medium's thiols. It is rational to conclude that the introduction of -CF<sub>3</sub> group to the aromatic rings of DFDD does not abolish its GPx mimetic and antioxidant properties and these still rely on thiols of cerebral electrogenic sodium pump. DFDD could be a suitable candidate for relative pharmacological effect and weak toxicity consequent to its possession of high electron withdrawing group. However, further research is needed in this regard.</p></div>","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"10 ","pages":"Article 100092"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667137923000322/pdfft?md5=3b9b894fe77384c92b2320c2db993ef4&pid=1-s2.0-S2667137923000322-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139190248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Romain Attal , Ashraf Bakkar , Frédéric Bouillaud , Anne Devin , Marc Henry , Maxime Pontié , Miroslav Radman , Laurent Schwartz
{"title":"From electrons to cancer : Redox shift as a driving force of tumorigenesis","authors":"Romain Attal , Ashraf Bakkar , Frédéric Bouillaud , Anne Devin , Marc Henry , Maxime Pontié , Miroslav Radman , Laurent Schwartz","doi":"10.1016/j.arres.2023.100087","DOIUrl":"https://doi.org/10.1016/j.arres.2023.100087","url":null,"abstract":"<div><p>Cancer cells are very diverse but mostly share a common metabolic property: they are strongly glycolytic even though oxygen is available. Herein, the metabolic abnormalities of cancer cells are interpreted as modifications of the electric currents in redox reactions. A lower current in the electron transport chain, an increase of the concentration of reduced cofactors and a partial reversal of the tricarboxylic acid cycle are physical characteristics of several forms of cancer. The existence of electric short-circuits between oxidative branches and reductive branches of the metabolic network argue in favor of an electronic approach of cancer in the nanoscopic scale. These changes of electron flows induce a pseudo-hypoxia and the Warburg effect through succinate production and divert electrons from oxygen to biosynthetic pathways. This new look at cancer may have potential therapeutic applications.</p></div>","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"10 ","pages":"Article 100087"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667137923000279/pdfft?md5=4c1d2f8af45c7c1621b020937a9b41c9&pid=1-s2.0-S2667137923000279-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138557310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A hypothetical mechanism capable to reflect the features of the mitochondrial permeability transition pore channel","authors":"Alexander G. Dimitrov","doi":"10.1016/j.arres.2024.100096","DOIUrl":"https://doi.org/10.1016/j.arres.2024.100096","url":null,"abstract":"<div><p>Mitochondrial permeability transition pore (mPTP) channel plays a central role in cell death because it mediates the effect of a sudden large opening of the inner mitochondrial membrane. Its associations with adenine nucleotide translocase and with ATP synthase within the general framework of mPTP research were challenged by genetic knock out experiments. This paper proposes the hypothesis that the matrix ATP regulates the mPTP. That hypothesis not only succeeds in classifying and explaining the existing experimental data but it also fits quite well to a peripheral branch of mPTP research proposing that the channel is composed of a combination of polyphosphates and poly-(<em>R</em>)-3-hydroxybutyrates glued by Ca ions. ATP also has a polyphosphate part and thus could be potentially incorporated into such kind of a channel. ATP not only has the potential to decrease the effective channel cross-section when the matrix ATP pool is full, but also, having four negative charges, ATP could be driven across the membrane, together with some accompanying metal ions. Thus, an effective potassium hydrogen exchanger is constructed. Cell death and “permeability transition” happen when the matrix ATP pool is emptied and so the mPTP channel is emptied from the ATP. As a result, the effective channel cross-section would greatly increase; instead of effectively going out, potassium would go in, and the matrix would burst. Hence, the regulation of the matrix ATP level could explain the effect of cyclosporin A – the main experimental modulator of mPTP channel activity, the mechanism of hypoxic/reperfusion injury, and many other.</p></div>","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"10 ","pages":"Article 100096"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667137924000031/pdfft?md5=b6bcea39067e15dc616ac860ea3a6333&pid=1-s2.0-S2667137924000031-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139731771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Human hair keratin responds to oxidative stress via reactive sulfur and supersulfides","authors":"Takeru Hirai , Mayumi Ikeda-Imafuku , Nanami Tasaka , Victor Tuan Giam Chuang , Ming Xian , Tatsuhiro Ishida , Takaaki Akaike , Yu Ishima","doi":"10.1016/j.arres.2023.100091","DOIUrl":"https://doi.org/10.1016/j.arres.2023.100091","url":null,"abstract":"<div><p>Keratin is a central component of human hair proteins, which explicitly possesses many cysteine residues (Cys-SH). For a long time, these Cys-SH residues were believed to contribute to human hair strength by forming intra- and inter-molecular disulfide bond crosslinks. However, we detected that many polysulfide bonds (R-SS<sub>(n)</sub>H or R-SS<sub>(n)</sub>S-R') exist in keratin. Polysulfide is one of the reactive sulfur and supersulfides, similar to cysteine persulfide (Cys-SSH), that regulates oxidative stress and redox signaling. In the present study, we elucidated the distribution of polysulfide in human hair and the reaction of polysulfide to various oxidative stress, such as heat shock and ultraviolet radiation. The decrease of the polysulfides in hair leads to the loss of antioxidant activity. Additionally, we demonstrated the effect of sulfur supplementation on human hair strength and hair cuticle structure. All types of oxidative stresses decreased the polysulfide in human hair, and hair polysulfide positively correlated with human hair strength. Intriguingly, sulfur supplementation improved human hair strength and the structure of hair cuticles. In conclusion, polysulfide in human hair keratin contributes to hair strength and antioxidant activity against oxidative stresses such as ultraviolet radiation and maintains hair homeostasis.</p></div>","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"10 ","pages":"Article 100091"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667137923000310/pdfft?md5=839b32e3f1e00b11f49964dead5de0d0&pid=1-s2.0-S2667137923000310-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139050439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"HOCl sensitivity associates with a reduced p53 transcriptional network and calreticulin expression in 25 human cancer cell lines","authors":"Debora Singer , Anke Schmidt , Sander Bekeschus","doi":"10.1016/j.arres.2024.100093","DOIUrl":"10.1016/j.arres.2024.100093","url":null,"abstract":"<div><p>Reactive oxygen species (ROS) play roles in physiological processes and pathological conditions. Higher ROS levels induce oxidative distress and cytotoxic responses, such as chronic inflammatory conditions and cancer. While the cellular responses of various cell types to cytotoxic pro-oxidative conditions have been well studied in the past decades, much less is known about the cellular gene and expression profiles that are <em>a priori</em> associated with subsequent cellular demise to oxidative stress. To this end, we used 25 human cancer cell lines of different origins and established the inhibitory concentration (IC<sub>25</sub>) of hypochlorous acid (HOCl), an oxidant readily produced by neutrophils frequently present in many inflamed tissues, including cancer. The HOCl sensitivity varied throughout the 25 cell lines investigated, showing a more than 5-fold difference between the most sensitive and resistant types. In parallel, we investigated untreated cells and their basal gene expression using transcriptomic microarray and performed correlation analyses to HOCl IC<sub>25</sub> values of all cell lines. Transcriptomic analyses and functional classification of significant correlating genes revealed reduced expression of tumor protein p53 signaling network members, including <em>BAX, CDKN1A</em> (p21), and <em>BTG2,</em> as well as the p53 gene (<em>TP53)</em> itself to associate with cell line sensitivity to HOCl toxicity. Further, baseline surface membrane expression analysis of 33 inflammation- and redox-related molecules identified nitric oxide (NO) synthase 2 and the ER-stress-associated chaperone calreticulin to correlate significantly with HOCl resistance. We identified targets associated with HOCl sensitivity. Nevertheless, further studies are needed to map gene and protein expression patterns associated with oxidative stress-induced cytotoxicity.</p></div>","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"10 ","pages":"Article 100093"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667137924000018/pdfft?md5=1e11f32ecde6e695c2e2ebe4249a2382&pid=1-s2.0-S2667137924000018-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139639677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Julie A. Griffith , Rachel D. King , Allison C. Dunn , Sara E. Lewis , Brooke A. Maxwell , Timothy R. Nurkiewicz , William T. Goldsmith , Eric E. Kelley , Elizabeth C. Bowdridge
{"title":"Maternal nano-titanium dioxide inhalation exposure alters placental cyclooxygenase and oxidant balance in a sexually dimorphic manner","authors":"Julie A. Griffith , Rachel D. King , Allison C. Dunn , Sara E. Lewis , Brooke A. Maxwell , Timothy R. Nurkiewicz , William T. Goldsmith , Eric E. Kelley , Elizabeth C. Bowdridge","doi":"10.1016/j.arres.2023.100090","DOIUrl":"https://doi.org/10.1016/j.arres.2023.100090","url":null,"abstract":"<div><p>The placenta plays a critical role in nutrient-waste exchange between the maternal and fetal circulation, and thus impacts fetal growth and development. We have previously shown that nano-titanium dioxide (nano-TiO<sub>2</sub>) inhalation exposure during gestation decreased fetal female pup and placenta mass <span>[1]</span>, which persists in the following generation <span>[2]</span>. In utero exposed females, once mated, their offspring's placentas had increased capacity for H<sub>2</sub>O<sub>2</sub> production. Generation of oxidants such as hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), have been shown to impact cyclooxygenase activity, specifically metabolites such as prostacyclin (PGI<sub>2</sub>) or thromboxane (TXA<sub>2</sub>). Therefore, we hypothesized that maternal nano-TiO<sub>2</sub> inhalation exposure during gestation results in alterations in placental production of prostacyclin and thromboxane mediated by enhanced H<sub>2</sub>O<sub>2</sub> production in a sexually dimorphic manner. Pregnant Sprague-Dawley rats were exposed to nano-TiO<sub>2</sub> aerosols or filtered air (sham-control) from gestational day (GD) 10–19. Dams were euthanized on GD 20, and fetal serum and placental tissue were collected based on fetal sex. Fetal placental zones (junctional zone (JZ) and labyrinth zone (LZ)) were assessed for xanthine oxidoreductase (XOR) activity, H<sub>2</sub>O<sub>2</sub>, and catalase activity, as well as 6-keto-PGF<sub>1α</sub> and TXB<sub>2</sub> levels. Nano-TiO<sub>2</sub> exposed fetal female LZ demonstrated significantly greater XOR activity compared to exposed males. Exposed fetal female LZ also demonstrated significantly diminished catalase activity compared to sham-control females. Exposed fetal female LZ had significantly increased abundance of 6-keto-PGF<sub>1α</sub> compared to sham-control females and increased TXB<sub>2</sub> compared to exposed males. In the aggregate these data indicate that maternal nano-TiO<sub>2</sub> inhalation exposure has a greater impact on redox homeostasis and PGI<sub>2</sub>/TXA<sub>2</sub> balance in the fetal female LZ. Future studies need to address if treatment with an XO inhibitor during gestation can prevent diminished fetal female growth during maternal nano-TiO<sub>2</sub> inhalation exposure.</p></div>","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"10 ","pages":"Article 100090"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667137923000309/pdfft?md5=9808f89b3b0e0a39afbf9868d6312269&pid=1-s2.0-S2667137923000309-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138821952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lilia A. Koza , Allison N. Grossberg , McKensey Bishop , Chad Prusmack , Daniel A. Linseman
{"title":"Sex-specific antioxidant biomarker depletion in patients with a history of mild traumatic brain injury","authors":"Lilia A. Koza , Allison N. Grossberg , McKensey Bishop , Chad Prusmack , Daniel A. Linseman","doi":"10.1016/j.arres.2024.100097","DOIUrl":"https://doi.org/10.1016/j.arres.2024.100097","url":null,"abstract":"<div><p>Individuals with a history of mild traumatic brain injury (mTBI) are at an increased risk for neurodegenerative disease, suggesting that intrinsic neuroprotective mechanisms, such as the endogenous antioxidant reservoir, may be depleted long-term after mTBI. Here, we retrospectively analyzed symptoms and blood antioxidants in patients with a history of mTBI who presented to Resilience Code, a sports medicine clinic in Colorado. Significant decreases in alpha-tocopherol, selenium, linoleic acid, taurine, docosahexaenoic acid, and total omega-3 were measured in the total mTBI population versus controls. Male mTBI patients showed depletion of a larger array of antioxidants than females. Patients with a history of mTBI also reported significantly worsened emotional, energy, head, and cognitive symptoms, with males displaying more extensive symptomology. Multiple or chronic mTBI patients had worsened symptoms than single or acute/subchronic mTBI patients, respectively. Finally, male mTBI patients with the largest reductions in polyunsaturated fatty acids (PUFAs) displayed worse symptomology than male mTBI patients with less depletion of this antioxidant reservoir. These results demonstrate that antioxidant depletion persists in patients with a history of mTBI and these deficits are sex-specific and associated with worsened symptomology. Furthermore, supplementation with specific antioxidants, like PUFAs, may diminish symptom severity in patients suffering from chronic effects of mTBI.</p></div>","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"10 ","pages":"Article 100097"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667137924000043/pdfft?md5=834b5820ad4583f3923b3af0fd1a4eee&pid=1-s2.0-S2667137924000043-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139999990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Essia Hamdi , Slah Hidouri , Ana-Belén Muniz-Gonzalez , Alberto Marcos Bermejo , César Venero , Salem Amara , Ahmed Landoulsi
{"title":"The role of glutamic acid-modified silica nanoparticles in promoting brain health","authors":"Essia Hamdi , Slah Hidouri , Ana-Belén Muniz-Gonzalez , Alberto Marcos Bermejo , César Venero , Salem Amara , Ahmed Landoulsi","doi":"10.1016/j.arres.2024.100095","DOIUrl":"https://doi.org/10.1016/j.arres.2024.100095","url":null,"abstract":"<div><p>SiO<sub>2</sub> nanoparticles functionalized with glutamate were investigated for their ability to alleviate oxidative stress caused by prolonged exposure to hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>). The study involved ten different groups, each consisting of eight animals, to examine the effects of H<sub>2</sub>O<sub>2</sub> <strong>-</strong>induced oxidative stress. The results demonstrated that exposure to H<sub>2</sub>O<sub>2</sub> stress oxidative biomarkers were altered accompanied with a loss of spatial learning and memory in rats performing the Morris water maze task. Furthermore, SiO<sub>2</sub> nanoparticles functionalized with L-glutamic acid alleviated the H<sub>2</sub>O<sub>2</sub>-induced acceleration of necrotic and degenerative cell changes in the hippocampus, subiculum, caudate-putamen, and frontal cortex. Additionally, L-glutamic acid-functionalized SiO<sub>2</sub> nanoparticles reduced the redox imbalance and interfered with acetylcholinesterase (AChE) and monoamine oxidase (MAO) activities induced by H<sub>2</sub>O<sub>2</sub>.</p></div>","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"10 ","pages":"Article 100095"},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266713792400002X/pdfft?md5=d8351624bade960149df60700963867b&pid=1-s2.0-S266713792400002X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139714995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of acetyl-11-keto-beta boswellic acid on hepatic membrane dynamics and lipidiome during conditions of benzo(a)pyrene induced toxicity","authors":"Rishav Puri , Priti Bhardwaj , Sunil Kumar Dhatwalia, Devinder Kumar Dhawan","doi":"10.1016/j.arres.2023.100086","DOIUrl":"https://doi.org/10.1016/j.arres.2023.100086","url":null,"abstract":"<div><h3>Background and Aim</h3><p>Pollution and lifestyle changes expose mankind to a number of toxicants such as polycyclic aromatic hydrocarbons that may cause life-threatening diseases. The present study was undertaken to explicate the protective role of Acetyl-11-Keto-Beta Boswellic Acid (AKBA), if any, in containing benzo(a)pyrene (BaP) induced alterations on hepatic membrane dynamics and lipidiome in female rats.</p></div><div><h3>Experimental procedure</h3><p>The animals were divided into five groups viz. Normal control, Vehicle treated, BaP treated, AKBA treated and BaP + AKBA treated. To induce hepatotoxicity, BaP was administered orally at a dose level of 50 mg/kg b.wt. dissolved in olive oil twice a week for 4 weeks. AKBA was supplemented to animals four weeks prior to BaP treatment and continued for 8 weeks at a dose level of 50 mg/kg b.wt. thrice a week. Certain key indices that included oxidative stress biomarkers, lipid profile of membranes, membrane fluidity parameters and activities of ATPases were studied.</p></div><div><h3>Results and Conclusion</h3><p>The results showed that benzo(a)pyrene treatment resulted in a significant increase in the levels of lipid peroxidation (LPO) and ROS but caused a significant decrease in the levels of total lipids, phospholipids, cholesterol, glycolipids and activities of ATPases. Hepatic membrane fluidity as assessed by 1,6-Diphenyl-1,3,5-hexatriene (DPH) and Pyrene fluorescence probes was significantly increased in rats intoxicated with BaP. Interestingly, AKBA supplementation to BaP treated rats appreciably contained altered membrane dynamics and lipidiome as well as modulated hepatotoxicity by skirmishing activities of oxidative stress markers and also improved hepatic histoarchitecture. Our study thus concludes that AKBA can be used as a prophylactic intervention in providing protection to hepatocytes as it maintains membrane integrity in conditions of BaP induced toxicity.</p></div>","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"9 ","pages":"Article 100086"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2667137923000267/pdfft?md5=753298c33766b5e29f7d10b6cf9f195f&pid=1-s2.0-S2667137923000267-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92019991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Endogenous ozone as a regular reactive oxygen species in (patho) physiology","authors":"Arnold N. Onyango","doi":"10.1016/j.arres.2023.100075","DOIUrl":"https://doi.org/10.1016/j.arres.2023.100075","url":null,"abstract":"","PeriodicalId":72106,"journal":{"name":"Advances in redox research : an official journal of the Society for Redox Biology and Medicine and the Society for Free Radical Research-Europe","volume":"9 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49776018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}