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Prevalence of Hypertension and Obesity: Profile of Mitochondrial Function and Markers of Inflammation and Oxidative Stress. Antioxidants (Basel) 2023; 12:antiox12010165. [PMID: 36671026 PMCID: PMC9854635 DOI: 10.3390/antiox12010165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/21/2022] [Accepted: 12/28/2022] [Indexed: 01/12/2023] Open
Abstract
Obesity and hypertension are health problems of increasing prevalence in developed countries. The link between obesity and hypertension is not yet fully determined. Oxidative stress (OS) and mitochondrial function may play a role in obesity-associated hypertension. A cross-sectional study with 175 subjects with normal weight, overweight, or obese who attended a medical check-up was included. The subjects were divided according to the body mass index (BMI) into normal-weight (n-53), overweight (n-84), and obesity (n-38). Hypertension was also evaluated. To measure mitochondrial function, ATP hydrolysis and ATP synthesis in platelets and serum, respectively, were determined. Superoxide dismutase (SOD), catalase, lipohydroperoxides, 8-isoprostanes, carbonyl groups in proteins, nitric oxide (NO) metabolites, 8-hydroxy-2′-deoxyguanosine (8-OHG), 8-oxoguanine glycosylase (hOGG1), tumor necrosis factor-alpha (TNF-α) and interleukin 6 (IL-6) were measured by standard colorimetric or immunoassay methods. Obese subjects showed lower ATP hydrolysis activity than normal weight and overweight subjects (p < 0.01). No differences between those groups were found in ATP synthase and catalase activities, lipid hydroperoxides, carbonyl groups in proteins, 8-isoprostanes, and NO metabolites. In the obesity group, SOD activity (p < 0.01) was decreased while 8-OHG (p < 0.01) was increased. Subjects with hypertension showed increased 8-OHG (p < 0.01) and less reparative enzyme (hOGG1 p = 0.04) than subjects with normal weight. Moreover, we found a decrease of SOD (p < 0.01), catalase activities (p = 0.04), NO metabolites (p < 0.01), and increases of carbonyl groups in proteins (p = 0.01), TNF-α (p < 0.01) and IL-6 (p < 0.01 in hypertensive subjects. Obese subjects show a decrease in ATP hydrolysis. The decrease in ATP hydrolysis rate and ATP synthesis and an increase in OS and inflammation markers were associated with the hypertensive state.
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2
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Rangasamy B, Malafaia G, Maheswaran R. Evaluation of antioxidant response and Na +-K +-ATPase activity in zebrafish exposed to polyethylene microplastics: Shedding light on a physiological adaptation. JOURNAL OF HAZARDOUS MATERIALS 2022; 426:127789. [PMID: 34801306 DOI: 10.1016/j.jhazmat.2021.127789] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 06/13/2023]
Abstract
Although the toxicity of microplastics has already been demonstrated in different animal models, our knowledge about the response of freshwater fish to this pollutant is still limited. Thus, we aimed to evaluate the impact of exposure of zebrafish adults (Danio rerio) to environmentally relevant concentrations of polyethylene microplastics (PE-MPs) (5 and 50 µg/L) and at different times of exposure (10 and 20 days). Initially, scanning electron microscope image illustrated size and format of the particle and FTIR analysis confirmed the presence of PE-MPs in the gastrointestinal tract of fish (at both concentrations tested). Subsequently, an alteration of oxidative and antioxidant responses was evaluated in the liver and brain. The results showed that catalase (CAT) activity, in liver, was significantly decreased, as was glutathione S-transferases (GSTs) activity (on the 10th experimental day). However, after 20 days of exposure, we observed a concentration-dependent increase in GST activity in liver of the animals exposed to PE-MPs. Furthermore, the lipid peroxidation (LPO) level was significantly increased by exposure to MPs, especially in the brain, after 20 days of exposure. The increase in Na+-K+-ATPase activity in the animals' gills was correlated with the increased production of malondialdehyde (MDA), which suggests the existence of a compensatory mechanism in which the high activity of this enzyme would be necessary to regulate the loss of ions caused by the increase in the processes of LPO, which has never been previously demonstrated. Thus, our study sheds light on a new physiological adaptation to deal with the oxidative effects of PE-MPs, in addition to supporting the future use of the assessment of Na+/K+-ATPase activity as a biomarker of the toxicity of these pollutants.
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Affiliation(s)
- Basuvannan Rangasamy
- Entomology Laboratory, Department of Zoology, School of Life Sciences, Periyar University, Salem, Tamil Nadu 636 011, India
| | - Guilherme Malafaia
- Biological Research Laboratory, Goiano Federal Institute, Urutaí Campus, Urutaí, GO, Brazil. Post-Graduation Program in Biotechnology and Biodiversity, Federal University of Goiás, Goiânia, GO, Brazil; Graduate Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute, Urutaí, GO, Brazil; Post-Graduation Program in Ecology and Natural Resources Conservation, Uberlândia, MG, Brazil
| | - Rajan Maheswaran
- Entomology Laboratory, Department of Zoology, School of Life Sciences, Periyar University, Salem, Tamil Nadu 636 011, India.
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Radosinska J, Vrbjar N. Erythrocyte Deformability and Na,K-ATPase Activity in Various Pathophysiological Situations and Their Protection by Selected Nutritional Antioxidants in Humans. Int J Mol Sci 2021; 22:11924. [PMID: 34769355 PMCID: PMC8584536 DOI: 10.3390/ijms222111924] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/29/2021] [Accepted: 10/30/2021] [Indexed: 02/02/2023] Open
Abstract
The physicochemical and functional properties of erythrocytes are worsened in a variety of diseases. Erythrocyte deformability refers to their ability to adjust their shape according to external forces exerted against them in the circulation. It is influenced by the functionality of the Na,K-ATPase enzyme, which is localized in their membranes. The proposed review is focused on knowledge regarding changes in erythrocyte Na,K-ATPase activity, and their impact on erythrocyte deformability in various pathophysiological situations observed exclusively in human studies, as well as on the potential erytroprotective effects of selected natural nutritional antioxidants. A clear link between the erythrocyte properties and the parameters of oxidative stress was observed. The undesirable consequences of oxidative stress on erythrocyte quality and hemorheology could be at least partially prevented by intake of diverse antioxidants occurring naturally in foodstuffs. Despite intensive research concerning the effect of antioxidants, only a small number of investigations on erythrocyte properties in humans is available in databases. It is worth shifting attention from animal and in vitro experiments and focusing more on antioxidant administration in human studies in order to establish what type of antioxidant, in what concentration, and in which individuals it may provide a beneficial effect on the human organism, by protecting erythrocyte properties.
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Affiliation(s)
- Jana Radosinska
- Institute of Physiology, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 2, 811 08 Bratislava, Slovakia
- Centre of Experimental Medicine, Slovak Academy of Sciences, Institute for Heart Research, Dúbravská Cesta 9, 841 04 Bratislava, Slovakia;
| | - Norbert Vrbjar
- Centre of Experimental Medicine, Slovak Academy of Sciences, Institute for Heart Research, Dúbravská Cesta 9, 841 04 Bratislava, Slovakia;
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Novel Combined Antioxidant Strategy against Hypertension, Acute Myocardial Infarction and Postoperative Atrial Fibrillation. Biomedicines 2021; 9:biomedicines9060620. [PMID: 34070760 PMCID: PMC8228412 DOI: 10.3390/biomedicines9060620] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/19/2021] [Accepted: 05/27/2021] [Indexed: 12/28/2022] Open
Abstract
Reactive oxygen species (ROS) play a physiological role in the modulation of several functions of the vascular wall; however, increased ROS have detrimental effects. Hence, oxidative stress has pathophysiological impacts on the control of the vascular tone and cardiac functions. Recent experimental studies reported the involvement of increased ROS in the mechanism of hypertension, as this disorder associates with increased production of pro-oxidants and decreased bioavailability of antioxidants. In addition, increased ROS exposure is found in ischemia-reperfusion, occurring in acute myocardial infarction and cardiac surgery with extracorporeal circulation, among other settings. Although these effects cause major heart damage, at present, there is no available treatment. Therefore, it should be expected that antioxidants counteract the oxidative processes, thereby being suitable against cardiovascular disease. Nevertheless, although numerous experimental studies agree with this notion, interventional trials have provided mixed results. A better knowledge of ROS modulation and their specific interaction with the molecular targets should contribute to the development of novel multitarget antioxidant effective therapeutic strategies. The complex multifactorial nature of hypertension, acute myocardial infarction, and postoperative atrial fibrillation needs a multitarget antioxidant strategy, which may give rise to additive or synergic protective effects to achieve optimal cardioprotection.
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Forman HJ, Zhang H. Targeting oxidative stress in disease: promise and limitations of antioxidant therapy. Nat Rev Drug Discov 2021; 20:689-709. [PMID: 34194012 PMCID: PMC8243062 DOI: 10.1038/s41573-021-00233-1] [Citation(s) in RCA: 911] [Impact Index Per Article: 303.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2021] [Indexed: 02/06/2023]
Abstract
Oxidative stress is a component of many diseases, including atherosclerosis, chronic obstructive pulmonary disease, Alzheimer disease and cancer. Although numerous small molecules evaluated as antioxidants have exhibited therapeutic potential in preclinical studies, clinical trial results have been disappointing. A greater understanding of the mechanisms through which antioxidants act and where and when they are effective may provide a rational approach that leads to greater pharmacological success. Here, we review the relationships between oxidative stress, redox signalling and disease, the mechanisms through which oxidative stress can contribute to pathology, how antioxidant defences work, what limits their effectiveness and how antioxidant defences can be increased through physiological signalling, dietary components and potential pharmaceutical intervention.
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Affiliation(s)
- Henry Jay Forman
- University of California Merced, Merced, CA, USA. .,Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA.
| | - Hongqiao Zhang
- grid.42505.360000 0001 2156 6853Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA USA
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De Souza Gonçalves B, Toledo MM, Colodette NM, Chaves ALF, Muniz LV, Ribeiro RIMDA, Dos Santos HB, Cortes VF, Soares JMA, Barbosa LA, de Lima Santos H. Evaluation of the Erythrocyte Membrane in Head and Neck Cancer Patients. J Membr Biol 2020; 253:617-629. [PMID: 33089392 DOI: 10.1007/s00232-020-00147-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 10/10/2020] [Indexed: 11/28/2022]
Abstract
Head and neck squamous cell carcinoma (HNSCC) is a heterogeneous and complex disease, both from a clinical and molecular point of view. The prolonged use of alcohol and tobacco, along with the release of tumor secretions can modulate blood cells, such as erythrocytes. Here, this study was conducted with 24 patients diagnosed with HNSCC and an equal number of healthy individuals are matched by age and gender. The levels of lipid peroxidation were measured using the individual plasma, while for lipid concentrations, identification and quantification Na, K-ATPase activity and osmotic fragility, the red blood cell concentrate were used. The release of TBARS was significantly higher in patients with HNSCC. The lipid profile assays demonstrated a rearrangement of the erythrocyte membrane due to a decrease in total phospholipids and phosphatidylethanolamine followed by an increase in total cholesterol and phosphatidylcholine. Na, K-ATPase activity also increased. Erythrocytes were more fragile in patients with HNSCC than in health individuals. Therefore, the membrane of erythrocytes were rearranged and Na, K-ATPase function altered in the HNSCC patients. Our findings suggests that the alcohol, tobacco and tumor secretion modulate in a specific manner that the erythrocytes membranes of these patients making this system a potential tool for HNSCC biomarker of tumor progression.
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Affiliation(s)
- Bruno De Souza Gonçalves
- Laboratório de Bioquímica Celular, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, 35501-296, Brazil
| | - Marina Marques Toledo
- Laboratório de Bioquímica Celular, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, 35501-296, Brazil
| | - Natalie Mounteer Colodette
- Laboratório de Bioquímica Celular, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, 35501-296, Brazil
| | - Aline Lauda Freitas Chaves
- Study Group On Head and Neck Cancer, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, Minas Gerais, Brazil
| | - Luciana Vieira Muniz
- Study Group On Head and Neck Cancer, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, Minas Gerais, Brazil
| | - Rosy Iara Maciel De A Ribeiro
- Laboratório de Patologia Experimental, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, MG, Brazil
| | - Hélio Batista Dos Santos
- Laboratório de Processamento de Tecidos, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, MG, Brazil
| | - Vanessa F Cortes
- Laboratório de Bioquímica Celular, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, 35501-296, Brazil
| | - João Marcos Arantes Soares
- Study Group On Head and Neck Cancer, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, Minas Gerais, Brazil.,Faculdade de Medicina, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, Minas Gerais, Brazil
| | - Leandro A Barbosa
- Laboratório de Bioquímica Celular, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, 35501-296, Brazil.
| | - Hérica de Lima Santos
- Laboratório de Bioquímica Celular, Federal University of São João del Rei, Campus Centro-Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Divinopolis, MG, 35501-296, Brazil.
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7
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Morabito R, Remigante A, Spinelli S, Vitale G, Trichilo V, Loddo S, Marino A. High Glucose Concentrations Affect Band 3 Protein in Human Erythrocytes. Antioxidants (Basel) 2020; 9:antiox9050365. [PMID: 32349441 PMCID: PMC7278607 DOI: 10.3390/antiox9050365] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/23/2020] [Accepted: 04/26/2020] [Indexed: 12/19/2022] Open
Abstract
Hyperglycemia is considered a threat for cell homeostasis, as it is associated to oxidative stress (OS). As erythrocytes are continuously exposed to OS, this study was conceived to verify the impact of either diabetic conditions attested to by glycated hemoglobin (Hb) levels (>6.5% or higher) or treatment with high glucose (15-35 mM, for 24 h) on erythrocyte homeostasis. To this aim, anion exchange capability through the Band 3 protein (B3p) was monitored by the rate constant for SO42- uptake. Thiobarbituric acid reactive species (TBARS), membrane sulfhydryl groups mostly belonging to B3p, glutathione reduced (GSH) levels, and B3p expression levels were also evaluated. The rate constant for SO42- uptake (0.063 ± 0.001 min-1, 16 min in healthy volunteers) was accelerated in erythrocytes from diabetic volunteers (0.113 ± 0.001 min-1, 9 min) and after exposure to high glucose (0.129 ± 0.001in-1, 7 min), but only in diabetic volunteers was there an increase in TBARS levels and oxidation of membrane sulfhydryl groups, and a decrease in both GSH and B3p expression levels was observed. A combined effect due to the glycated Hb and OS may explain what was observed in diabetic erythrocytes, while in in vitro hyperglycemia, early OS could explain B3p anion exchange capability alterations as proven by the use of melatonin. Finally, measurement of B3p anion exchange capability is a suitable tool to monitor the impact of hyperglycemia on erythrocytes homeostasis, being the first line of high glucose impact before Hb glycation. Melatonin may be useful to counteract hyperglycemia-induced OS at the B3p level.
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Affiliation(s)
- Rossana Morabito
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno D’Alcontres 31-98166, 98122 Messina, Italy; (R.M.); (A.R.); (S.S.); (G.V.)
| | - Alessia Remigante
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno D’Alcontres 31-98166, 98122 Messina, Italy; (R.M.); (A.R.); (S.S.); (G.V.)
| | - Sara Spinelli
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno D’Alcontres 31-98166, 98122 Messina, Italy; (R.M.); (A.R.); (S.S.); (G.V.)
| | - Giulia Vitale
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno D’Alcontres 31-98166, 98122 Messina, Italy; (R.M.); (A.R.); (S.S.); (G.V.)
| | - Vincenzo Trichilo
- Department of Clinical and Experimental Medicine, AOU Policlinico Universitario “G. Martino”, Via Consolare Valeria-98125, 98124 Messina, Italy; (V.T.); (S.L.)
| | - Saverio Loddo
- Department of Clinical and Experimental Medicine, AOU Policlinico Universitario “G. Martino”, Via Consolare Valeria-98125, 98124 Messina, Italy; (V.T.); (S.L.)
| | - Angela Marino
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno D’Alcontres 31-98166, 98122 Messina, Italy; (R.M.); (A.R.); (S.S.); (G.V.)
- Correspondence: ; Tel.: +39-(0)90-676-5214
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8
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Morris G, Maes M, Berk M, Carvalho AF, Puri BK. Nutritional ketosis as an intervention to relieve astrogliosis: Possible therapeutic applications in the treatment of neurodegenerative and neuroprogressive disorders. Eur Psychiatry 2020; 63:e8. [PMID: 32093791 PMCID: PMC8057392 DOI: 10.1192/j.eurpsy.2019.13] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Nutritional ketosis, induced via either the classical ketogenic diet or the use of emulsified medium-chain triglycerides, is an established treatment for pharmaceutical resistant epilepsy in children and more recently in adults. In addition, the use of oral ketogenic compounds, fractionated coconut oil, very low carbohydrate intake, or ketone monoester supplementation has been reported to be potentially helpful in mild cognitive impairment, Parkinson’s disease, schizophrenia, bipolar disorder, and autistic spectrum disorder. In these and other neurodegenerative and neuroprogressive disorders, there are detrimental effects of oxidative stress, mitochondrial dysfunction, and neuroinflammation on neuronal function. However, they also adversely impact on neurone–glia interactions, disrupting the role of microglia and astrocytes in central nervous system (CNS) homeostasis. Astrocytes are the main site of CNS fatty acid oxidation; the resulting ketone bodies constitute an important source of oxidative fuel for neurones in an environment of glucose restriction. Importantly, the lactate shuttle between astrocytes and neurones is dependent on glycogenolysis and glycolysis, resulting from the fact that the astrocytic filopodia responsible for lactate release are too narrow to accommodate mitochondria. The entry into the CNS of ketone bodies and fatty acids, as a result of nutritional ketosis, has effects on the astrocytic glutamate–glutamine cycle, glutamate synthase activity, and on the function of vesicular glutamate transporters, EAAT, Na+, K+-ATPase, Kir4.1, aquaporin-4, Cx34 and KATP channels, as well as on astrogliosis. These mechanisms are detailed and it is suggested that they would tend to mitigate the changes seen in many neurodegenerative and neuroprogressive disorders. Hence, it is hypothesized that nutritional ketosis may have therapeutic applications in such disorders.
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Affiliation(s)
- Gerwyn Morris
- Deakin University, IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Geelong, Victoria, Australia
| | - Michael Maes
- Deakin University, IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Geelong, Victoria, Australia.,Department of Psychiatry, Chulalongkorn University, Faculty of Medicine, Bangkok, Thailand
| | - Michael Berk
- Deakin University, IMPACT Strategic Research Centre, Barwon Health, School of Medicine, Geelong, Victoria, Australia.,Deakin University, CMMR Strategic Research Centre, School of Medicine, Geelong, Victoria, Australia.,Orygen, The National Centre of Excellence in Youth Mental Health, The Department of Psychiatry and the Florey Institute for Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia
| | - André F Carvalho
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada
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9
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Comparative study of different glycating agents on human plasma and vascular cells. Mol Biol Rep 2019; 47:521-531. [DOI: 10.1007/s11033-019-05158-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 10/23/2019] [Indexed: 12/15/2022]
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10
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Ishihara Y, Itoh K, Oguro A, Chiba Y, Ueno M, Tsuji M, Vogel CFA, Yamazaki T. Neuroprotective activation of astrocytes by methylmercury exposure in the inferior colliculus. Sci Rep 2019; 9:13899. [PMID: 31554907 PMCID: PMC6761145 DOI: 10.1038/s41598-019-50377-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 09/11/2019] [Indexed: 11/17/2022] Open
Abstract
Methylmercury (MeHg) is well known to induce auditory disorders such as dysarthria. When we performed a global analysis on the brains of mice exposed to MeHg by magnetic resonance imaging, an increase in the T1 signal in the inferior colliculus (IC), which is localized in the auditory pathway, was observed. Therefore, the purpose of this study is to examine the pathophysiology and auditory dysfunction induced by MeHg, focusing on the IC. Measurement of the auditory brainstem response revealed increases in latency and decreases in threshold in the IC of mice exposed to MeHg for 4 weeks compared with vehicle mice. Incoordination in MeHg-exposed mice was noted after 6 weeks of exposure, indicating that IC dysfunction occurs earlier than incoordination. There was no change in the number of neurons or microglial activity, while the expression of glial fibrillary acidic protein, a marker for astrocytic activity, was elevated in the IC of MeHg-exposed mice after 4 weeks of exposure, indicating that astrogliosis occurs in the IC. Suppression of astrogliosis by treatment with fluorocitrate exacerbated the latency and threshold in the IC evaluated by the auditory brainstem response. Therefore, astrocytes in the IC are considered to play a protective role in the auditory pathway. Astrocytes exposed to MeHg increased the expression of brain-derived neurotrophic factor in the IC, suggesting that astrocytic brain-derived neurotrophic factor is a potent protectant in the IC. This study showed that astrogliosis in the IC could be an adaptive response to MeHg toxicity. The overall toxicity of MeHg might be determined on the basis of the balance between MeHg-mediated injury to neurons and protective responses from astrocytes.
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Affiliation(s)
- Yasuhiro Ishihara
- Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, 739-8521, Japan. .,Center for Health and the Environment, University of California, Davis, CA, 95616, USA.
| | - Kouichi Itoh
- Laboratory for Pharmacotherapy and Experimental Neurology, Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Kagawa, 769-2193, Japan
| | - Ami Oguro
- Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, 739-8521, Japan
| | - Yoichi Chiba
- Department of Pathology and Host Defense, Faculty of Medicine, Kagawa University, Kagawa, 761-0793, Japan
| | - Masaki Ueno
- Department of Pathology and Host Defense, Faculty of Medicine, Kagawa University, Kagawa, 761-0793, Japan
| | - Mayumi Tsuji
- Department of Environmental Health, University of Occupational and Environmental Health, Fukuoka, 807-8555, Japan
| | - Christoph F A Vogel
- Center for Health and the Environment, University of California, Davis, CA, 95616, USA.,Department of Environmental Toxicology, University of California, Davis, CA, 95616, USA
| | - Takeshi Yamazaki
- Program of Life and Environmental Sciences, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, 739-8521, Japan
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11
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Lack of a Synergistic Effect on Cardiometabolic and Redox Markers in a Dietary Supplementation with Anthocyanins and Xanthophylls in Postmenopausal Women. Nutrients 2019; 11:nu11071533. [PMID: 31284490 PMCID: PMC6683247 DOI: 10.3390/nu11071533] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/01/2019] [Accepted: 07/03/2019] [Indexed: 12/31/2022] Open
Abstract
Fruits and vegetables are pivotal for a healthy diet due partly to their content in bioactive compounds. It is for this reason that we conducted a parallel study to unravel the possible effect on cardiometabolic parameters of the ingestion of anthocyanins, xanthophylls, or both groups of bioactives together in postmenopausal women. Seventy-two postmenopausal women were randomized into an 8-month parallel study: a group consuming 60 mg/day anthocyanins (Group A), a group consuming 6 mg lutein and 2 mg zeaxanthin per day (Group X), and a third group consuming a combination of anthocyanins and xanthophylls in the same amounts (Group A+X). Non-targeted metabolomic analysis was done in plasma samples at baseline and after the 8-month intervention by HPLC-QTOF-MS. Inflammatory, antioxidant, and cardiometabolic parameters were measured at the beginning of the study and after 4 and 8-months intervention. Compared with baseline values, none of the 8-month treatments significantly (p < 0.05) changed systolic or diastolic blood pressure (BP), plasma C-reactive protein, interleukin 6, vascular cell adhesion molecule-1, intercellular adhesion molecule-1, monocyte chemoattractant protein-1 or matrix metalloproteinases 2 and 9. Only plasma glucose levels were significantly decreased by treatment A+X after 8 months, and the plasma metabolomic profile was clearly affected by all three dietary supplementations after 8 months. In parallel, there was an increase, also for the three groups, in the plasma ferric reducing antioxidant power value that did not show any synergistic effect between the two groups of bioactives. Postmenopausal women could benefit from an increase in anthocyanins and xanthophylls intake, through the consumption of fruits and vegetables rich in these two types of compounds. Accordingly, plasma glucose and, above all, the reducing power in plasma, could be improved.
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12
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Saturated fatty acids induce NLRP3 activation in human macrophages through K + efflux resulting from phospholipid saturation and Na, K-ATPase disruption. Biochim Biophys Acta Mol Cell Biol Lipids 2019; 1864:1017-1030. [PMID: 30953761 DOI: 10.1016/j.bbalip.2019.04.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 12/20/2018] [Accepted: 01/06/2019] [Indexed: 12/29/2022]
Abstract
NLRP3 inflammasome plays a key role in Western diet-induced systemic inflammation and was recently shown to mediate long-lasting trained immunity in myeloid cells. Saturated fatty acids (SFAs) are sterile triggers able to induce the assembly of the NLRP3 inflammasome in macrophages, leading to IL-1β secretion while unsaturated ones (UFAs) prevent SFAs-mediated NLRP3 activation. Unlike previous studies using LPS-primed bone marrow derived macrophages, we do not see any ROS or IRE-1α involvement in SFAs-mediated NLRP3 activation in human monocytes-derived macrophages. Rather we show that SFAs need to enter the cells and to be activated into acyl-CoA to lead to NLRP3 activation in human macrophages. However, their β-oxidation is dispensable. Instead, they are channeled towards phospholipids but redirected towards lipid droplets containing triacylglycerol in the presence of UFAs. Lipidomic analyses and Laurdan fluorescence experiments demonstrate that SFAs induce a dramatic saturation of phosphatidylcholine (PC) correlated with a loss of membrane fluidity, both events inhibited by UFAs. The silencing of CCTα, the key enzyme in PC synthesis, prevents SFA-mediated NLRP3 activation, demonstrating the essential role of the de novo PC synthesis. This SFA-induced membrane remodeling promotes a disruption of the plasma membrane Na, K-ATPase, instigating a K+ efflux essential and sufficient for NLRP3 activation. This work opens novel therapeutic avenues to interfere with Western diet-associated diseases such as those targeting the glycerolipid pathway.
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Rajab AM, Rahman S, Rajab TM, Haider KH. Morphology and Chromic Status of Red Blood Cells Are Significantly Influenced by Gestational Diabetes. J Hematol 2018; 7:140-148. [PMID: 32300429 PMCID: PMC7155852 DOI: 10.14740/jh449w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 10/08/2018] [Indexed: 01/15/2023] Open
Abstract
Background The study shows the effect of hyperglycemia on RBCs in terms of morphological changes and their chromic status in women with gestational diabetes mellitus (GDM). Methods A total of 100 pregnant women were enrolled from Maternity and Children Hospital, Qassim, Saudi Arabia including 40 women with confirmed GDM (group-1), 30 women with either type 1 or type 2 diabetes (group-2) and 30 women with normal pregnancy without GDM or pre-gestational diabetes (control group-3). Demographic, anthropometric, medical and biochemical data were obtained from the study subjects. Complete blood count (CBC) and peripheral smears were performed from routine blood samples. Red blood cells (RBCs) morphological analysis was carried out by a hematologist and deviations in size, shape, and staining properties of the RBCs were recorded. Results The groups were similar in demographic characteristics (P > 0.05). RBCs showed normocytic and normochromic features in 83.3% patients of group-3 as compared to 57.5% in group-1, 30% in group-2, respectively. Microcytic hypochromic cells and anisocytosis were mostly encountered in group-2 in 53.3% and 93.3% patients respectively (P = 0.000). Forty percent of RBCs in goup-1 showed microcytic and hypochromic characteristics as compared to group-3 (P = 0.015). Additionally, 42.5% group-1 patients had anisocytosis as compared to group-3 (P = 0.003). Poikilocytosis, target cells and macrocytes were mostly observed in group-2. Conclusions Persistent hyperglycemia changes shape, size and hemoglobin contents of RBCs which are associated with the hyperglycemic status and exposure time.
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Affiliation(s)
| | - Saifur Rahman
- Maternity and Children Hospital (MCH), Buraidah, AlQaseem, Saudi Arabia
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Garcia IJP, Cézar JS, Lemos BS, Silva LN, Ribeiro RIMDA, Santana CC, Grillo LAM, Pinto FCH, Buzelle SL, Cortes VF, Santos HDL, Santos MESMD, Barbosa LA. Effects of high fat diet on kidney lipid content and the Na,K-ATPase activity. BRAZ J PHARM SCI 2018. [DOI: 10.1590/s2175-97902018000117165] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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15
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Çakıcı EK, Eroğlu FK, Yazılıtaş F, Bülbül M, Gür G, Aydoğ Ö, Güngör T, Erel Ö, Alışık M, Elhan AH. Evaluation of the level of dynamic thiol/disulphide homeostasis in adolescent patients with newly diagnosed primary hypertension. Pediatr Nephrol 2018; 33:847-853. [PMID: 29297098 DOI: 10.1007/s00467-017-3865-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Revised: 11/29/2017] [Accepted: 11/30/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND Thiol/disulphide homeostasis plays a critical role in numerous intracellular enzymatic pathways including antioxidant defense and detoxification. This study was designed to investigate the impact of thiol/disulfide homeostasis in adolescent patients with recently diagnosed primary hypertension (HT) using a novel and automated method. METHODS Native thiol/disulphide levels were measured by a novel spectrophotometric method (Cobasc 501, Roche Diagnostics, Mannheim, Germany) in 30 patients with primary HT together with 30 healthy controls. RESULTS The levels of native thiol, total thiol, and native thiol/total thiol ratios were significantly lower, while the disulphide level, disulphide/native thiol, and disulphide/total thiol ratios were significantly higher in patients with primary HT compared with the control group. There were significant positive correlations between 24-h mean systolic and diastolic blood pressure and disulphide levels, disulphide/native thiol, and disulphide/total thiol ratios. A multiple linear regression model showed that a disulphide/native thiol ratio above 5 and family history of HT are independent predictors of HT. CONCLUSIONS Our study showed that dynamic thiol/disulphide homeostasis shifted towards disulphide formation in adolescent patients with primary HT. Understanding the role of thiol/disulfide homeostasis in primary HT might provide new therapeutic intervention strategies for patients.
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Affiliation(s)
- Evrim Kargın Çakıcı
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey.
| | - Fehime Kara Eroğlu
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Fatma Yazılıtaş
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Mehmet Bülbül
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Gökçe Gür
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Özlem Aydoğ
- Department of Pediatric Nephrology, 19 Mayis University Medical School, Samsun, Turkey
| | - Tülin Güngör
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Özcan Erel
- Department of Biochemistry, Yıldırım Beyazıt University Medical School, Ankara, Turkey
| | - Murat Alışık
- Department of Biochemistry, Yıldırım Beyazıt University Medical School, Ankara, Turkey
| | - Atilla Halil Elhan
- Department of Biostatistics, Ankara University Medical School, Ankara, Turkey
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Gianfrancesco MA, Paquot N, Piette J, Legrand-Poels S. Lipid bilayer stress in obesity-linked inflammatory and metabolic disorders. Biochem Pharmacol 2018; 153:168-183. [PMID: 29462590 DOI: 10.1016/j.bcp.2018.02.022] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 02/15/2018] [Indexed: 12/13/2022]
Abstract
The maintenance of the characteristic lipid compositions and physicochemical properties of biological membranes is essential for their proper function. Mechanisms allowing to sense and restore membrane homeostasis have been identified in prokaryotes for a long time and more recently in eukaryotes. A membrane remodeling can result from aberrant metabolism as seen in obesity. In this review, we describe how such lipid bilayer stress can account for the modulation of membrane proteins involved in the pathogenesis of obesity-linked inflammatory and metabolic disorders. We address the case of the Toll-like receptor 4 that is implicated in the obesity-related low grade inflammation and insulin resistance. The lipid raft-mediated TLR4 activation is promoted by an enrichment of the plasma membrane with saturated lipids or cholesterol increasing the lipid phase order. We discuss of the plasma membrane Na, K-ATPase that illustrates a new concept according to which direct interactions between specific residues and particular lipids determine both stability and activity of the pump in parallel with indirect effects of the lipid bilayer. The closely related sarco(endo)-plasmic Ca-ATPase embedded in the more fluid ER membrane seems to be more sensitive to a lipid bilayer stress as demonstrated by its inactivation in cholesterol-loaded macrophages or its inhibition mediated by an increased PtdCho/PtdEtn ratio in obese mice hepatocytes. Finally, we describe the model recently proposed for the activation of the conserved IRE-1 protein through alterations in the ER membrane lipid packing and thickness. Such IRE-1 activation could occur in response to abnormal lipid synthesis and membrane remodeling as observed in hepatocytes exposed to excess nutrients. Since the IRE-1/XBP1 branch also stimulates the lipid synthesis, this pathway could create a vicious cycle "lipogenesis-ER lipid bilayer stress-lipogenesis" amplifying hepatic ER pathology and the obesity-linked systemic metabolic defects.
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Affiliation(s)
- Marco A Gianfrancesco
- Laboratory of Immunometabolism and Nutrition, GIGA-I3, University of Liège, Liège, Belgium; Division of Diabetes, Nutrition and Metabolic Disorders, Department of Medicine, University Hospital of Liège, Liège, Belgium
| | - Nicolas Paquot
- Laboratory of Immunometabolism and Nutrition, GIGA-I3, University of Liège, Liège, Belgium; Division of Diabetes, Nutrition and Metabolic Disorders, Department of Medicine, University Hospital of Liège, Liège, Belgium
| | - Jacques Piette
- Laboratory of Virology and Immunology, GIGA-Molecular Biology of Diseases, University of Liège, Liège, Belgium
| | - Sylvie Legrand-Poels
- Laboratory of Immunometabolism and Nutrition, GIGA-I3, University of Liège, Liège, Belgium; Laboratory of Virology and Immunology, GIGA-Molecular Biology of Diseases, University of Liège, Liège, Belgium.
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Muñoz Marín D, Barrientos G, Alves J, Grijota FJ, Robles MC, Maynar M. Oxidative stress, lipid peroxidation indexes and antioxidant vitamins in long and middle distance athletes during a sport season. J Sports Med Phys Fitness 2017; 58:1713-1719. [PMID: 29072036 DOI: 10.23736/s0022-4707.17.07887-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The main objective of this study was to observe any changes and possible adaptations produced in MDA and antioxidants vitamins on plasma and erythrocytes in endurance male athletes among an athletic season (12 months). METHODS Twenty three long and middle distance male athletes participated in this study. Basal MDA on plasma and antioxidant vitamins in plasma and erythrocytes were measured at four moments along the season (0, 3, 6 and 9 months). Fatty acid concentrations in erythrocytes were obtained to determine lipid peroxidation indexes. RESULTS In plasma, vitamin C suffered significant decreases at 3 and 6 months compared with the begin (P<0.01), and an increase at 9 months, compared with 3 months. On the other hand, vitamin A level was significantly lower at 9 months compared with the other periods (P<0.01 compared with 0 and 6 months; P<0.05 compared with 3 months). In erythrocytes, significant decreases were observed in vitamin E among the season at 6 months and an increase from 6 to 9 months (P<0.05). Vitamin A suffers a significant decrease in both for competitive periods, at 3 and 9 months, compared with the beginning of the season. The most of changes in lipid peroxidation indexes were produced along the firsts 3 months. CONCLUSIONS 1) Physical training improves the antioxidant systems in order to reduce lipid peroxidation in trained athletes along the season; 2) PUFA/SFA ratios seem more reliable than MDA to observe oxidative stress.
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Affiliation(s)
- Diego Muñoz Marín
- Department of Physiology, Faculty of Sports Science, University of Extremadura, Cáceres, Spain -
| | - Gema Barrientos
- Department of Sport Science, Faculty of Education, Pontifical University of Salamanca, Salamanca, Spain
| | - Javier Alves
- Department of Sport Science, Faculty of Education, Pontifical University of Salamanca, Salamanca, Spain
| | - Francisco J Grijota
- Department of Sport Science, Faculty of Education, Pontifical University of Salamanca, Salamanca, Spain
| | - Maria C Robles
- Department of Physiology, Faculty of Sports Science, University of Extremadura, Cáceres, Spain
| | - Marcos Maynar
- Department of Physiology, Faculty of Sports Science, University of Extremadura, Cáceres, Spain
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Szablewski L, Sulima A. The structural and functional changes of blood cells and molecular components in diabetes mellitus. Biol Chem 2017; 398:411-423. [DOI: 10.1515/hsz-2016-0196] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 10/14/2016] [Indexed: 12/13/2022]
Abstract
Abstract
It is known fact that diabetes mellitus (DM) affects blood cells. Changes in the erythrocyte membrane, disorder in hemoglobin oxygen-binding and modification in mechanical characteristics, are effects of hyperglycemia on red blood cells. Altered susceptibility infection of patients with diabetes has been ascribed to a depression in the function of polymorphonuclear leukocytes. Neutrophil function in patients with diabetes with good glucose control is slightly different than in healthy ones. DM causes significant changes in lymphocytes metabolism and their functions. Patients with diabetes, presenting with acute coronary syndrome, are at higher risk of cardiovascular complications and recurrent ischemic events in comparison to non-diabetic counterparts. Various mechanisms, including endothelial dysfunction, platelet hyperactivity, and abnormalities in coagulation and fibrynolysis have been implicated for this increased atherothrombotic risk. There are many other alterations of blood cells due to DM. In the present review we focused on modifications of blood cells due to DM. Then, as a second point, we explored how the changes affect functions of red blood cells, white blood cells and platelets.
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Wang G, Zhang M, Zhong Q, Lei Z, Wu H, Lai F. Protective effects of resveratrol against hypoxanthine-xanthine oxidase-induced toxicity on human erythrocytes. J Funct Foods 2016. [DOI: 10.1016/j.jff.2016.02.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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21
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Zhang Q, Cao Z, Sun X, Zuang C, Huang W, Li Y. Aluminum Trichloride Induces Hypertension and Disturbs the Function of Erythrocyte Membrane in Male Rats. Biol Trace Elem Res 2016; 171:116-23. [PMID: 26354416 DOI: 10.1007/s12011-015-0504-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 09/01/2015] [Indexed: 10/23/2022]
Abstract
Aluminum (Al) is the most abundant metal in the earth's crust. Al accumulates in erythrocyte and causes toxicity on erythrocyte membrane. The dysfunction of erythrocyte membrane is a potential risk to hypertension. The high Al content in plasma was associated with hypertension. To investigate the effect of AlCl3 on blood pressure and the function of erythrocyte membrane, the rats were intragastrically exposed to 0, 64(1/20 LD50), 128(1/10 LD50), and 256(1/5 LD50) mg/kg body weight AlCl3 in double distilled water for 120 days, respectively. Then, we determined the systolic and mean arterial blood pressures of rats, the osmotic fragility, the percentage of membrane proteins, the activities of Na(+)/K(+)-ATPase, Mg(2+)-ATPase, Ca(2+)-ATPase, catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GSH-pX), and malondialdehyde (MDA) content of the erythrocyte membrane in this experiment. The results showed that AlCl3 elevated the systolic and mean arterial blood pressure of rats, increased the osmotic fragility, decreased the percentage of membrane protein, inhibited the activities of Na(+)/K(+)-ATPase, Mg(2+)-ATPase, Ca(2+)-ATPase, CAT, SOD and GSH-pX, and increased the MDA content of erythrocyte membrane. These results indicate that AlCl3 may induce hypertension by disturbing the function of erythrocyte membrane.
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Affiliation(s)
- Qiuyue Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Zheng Cao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Xudong Sun
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Cuicui Zuang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Wanyue Huang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China
| | - Yanfei Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, China.
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22
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Solak Y, Afsar B, Vaziri ND, Aslan G, Yalcin CE, Covic A, Kanbay M. Hypertension as an autoimmune and inflammatory disease. Hypertens Res 2016; 39:567-73. [PMID: 27053010 DOI: 10.1038/hr.2016.35] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 02/24/2016] [Accepted: 02/29/2016] [Indexed: 12/11/2022]
Abstract
Hypertension that is considered idiopathic is called essential hypertension and accordingly has no clear culprit for its cause. However, basic research and clinical studies in recent years have expanded our understanding of the mechanisms underlying the development of essential hypertension. Of these, increased oxidative stress, both in the kidney and arterial wall, closely coupled with inflammatory infiltration now appear to have a prominent role. Discovery of regulatory and interleukin-17-producing T cells has enabled us to better understand the mechanism by which inflammation and autoimmunity, or autoinflammation, lead to the development of hypertension. Despite achieving considerable progress, the intricate interactions between oxidative stress, the immune system and the development of hypertension remain to be fully elucidated. In this review, we summarize recent developments in the pathophysiology of hypertension with a focus on the oxidant stress-autoimmunity-inflammation interaction.
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Affiliation(s)
- Yalcin Solak
- Department of Internal Medicine, Division of Nephrology, Sakarya University Training and Research Hospital, Sakarya, Turkey
| | - Baris Afsar
- Department of Medicine, Division of Nephrology, Konya Numune State Hospital, Konya, Turkey
| | - Nosratola D Vaziri
- Department of Medicine, Division of Nephrology and Hypertension, Schools of Medicine and Biological Science, University of California Irvine, California, CA, USA
| | - Gamze Aslan
- Department of Cardiology, Koc University School of Medicine, Istanbul, Turkey
| | - Can Ege Yalcin
- Department of Medicine, Koc University School of Medicine, Istanbul, Turkey
| | - Adrian Covic
- Nephrology Clinic, Dialysis and Renal Transplant Center, 'CI PARHON' University Hospital, and 'Grigore T Popa' University of Medicine, Iasi, Romania
| | - Mehmet Kanbay
- Department of Medicine, Division of Nephrology, Koc University School of Medicine, Istanbul, Turkey
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Dynamic thiol/disulphide homeostasis in patients with newly diagnosed primary hypertension. ACTA ACUST UNITED AC 2015; 10:159-66. [PMID: 26725016 DOI: 10.1016/j.jash.2015.12.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 11/02/2015] [Accepted: 12/02/2015] [Indexed: 02/07/2023]
Abstract
We aimed to investigate the thiol/disulphide homeostasis in patients with newly diagnosed primary hypertension with a novel and automated method. Blood thiol/disulphide homeostasis, which consists of native thiol/disulphide exchanges, was investigated in 45 patients with primary hypertension and 45 healthy controls. The levels of native thiol, total thiol, and native thiol/total thiol ratio were lower while the disulphide level and disulphide/native thiol and disulphide/total thiol ratios were higher in patients with primary hypertension when compared with those in the control group. Positive correlation was detected between 24-hour systolic and diastolic blood pressure levels and disulphide/native thiol ratio. With reference to the stepwise multiple linear regression model; increase in disulphide/native thiol ratio and log(24-hour urine microalbumin) and decrease in native thiol/total thiol ratio are independent predictors of 24-hour systolic and diastolic blood pressure. This study demonstrated that thiol/disulphide homeostasis was shifted toward disulphide formation in patients with primary hypertension.
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Tükel HC, Alptekin Ö, Turan B, Delilbaşı E. Effects of metabolic syndrome on masseter muscle of male Wistar rats. Eur J Oral Sci 2015; 123:432-8. [DOI: 10.1111/eos.12226] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2015] [Indexed: 01/21/2023]
Affiliation(s)
- H. Can Tükel
- Department of Oral and Maxillofacial Surgery; Faculty of Dentistry; University of Cukurova; Adana Turkey
| | - Özlem Alptekin
- Department of Biochemistry; Faculty of Pharmacy; University of Cukurova; Adana Turkey
| | - Belma Turan
- Department of Biophysics; Faculty of Medicine; University of Ankara; Ankara Turkey
| | - Ertan Delilbaşı
- Department of Oral and Maxillofacial Surgery; Faculty of Dentistry; University of Gazi; Ankara Turkey
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25
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Altered erythrocyte membrane protein composition mirrors pleiotropic effects of hypertension susceptibility genes and disease pathogenesis. J Hypertens 2015; 33:2265-77. [DOI: 10.1097/hjh.0000000000000699] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Ateş İ, Ozkayar N, Altay M, Yilmaz FM, Topçuoğlu C, Alışık M, Erel Ö, Dede F. Is disulphide/thiol ratio related to blood pressure in masked hypertension? Clin Exp Hypertens 2015; 38:150-4. [PMID: 26418425 DOI: 10.3109/10641963.2015.1060995] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Dynamic thiol/disulphide homeostasis plays a critical role in numerous intracellular enzymatic pathways including antioxidant defence and detoxification. In this study, we sought to investigate dynamic thiol/disulphide homeostasis in patients with masked hypertension (MHT) and its relationship with blood pressure. Forty patients (23 men, 17 women) with newly diagnosed MHT and not yet on medical therapy, and 40 healthy volunteers (21 men, 19 women) were enrolled. Blood thiol/disulphide homeostasis was measured in both groups. Serum native and total thiol levels were measured using the novel, fully automated colorimetric method developed by Erel et al. Serum disulphide level was calculated as (serum total thiol - serum native thiol)/2. Native and total thiol levels (p = 0.001) and native thiol/total thiol ratio (p = 0.023) were found to be lower in patients with MHT when compared to those of the control group. Disulphide level and ratios of disulphide/native thiol and disulphide/total thiol were higher in patients with MHT than in the control group (p = 0.001). A positive correlation of systolic blood pressure (SBP) and diastolic blood pressure (DBP) was observed with disulphide/native thiol ratio (p < 0.001). Stepwise multivariable regression analysis showed disulphide/native thiol ratio to be an independent risk factor of SBP and DBP, and SBP to be an independent risk factor of disulphide/thiol ratio (p = 0.001). In this study, we found that dynamic thiol/disulphide homeostasis shifted towards disulphide formation due to thiol oxidation in patients with MHT. Prospective randomised controlled studies are required to elucidate whether abnormal thiol/disulphide status lies in the pathogenesis of MHT or is a consequence of MHT.
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Affiliation(s)
| | | | | | - Fatma Meriç Yilmaz
- c Biochemistry Department , Ankara Numune Education and Research Hospital , Ankara , Turkey , and.,d Department of Biochemistry , Medical Faculty, Yildirim Beyazit University , Ankara , Turkey
| | - Canan Topçuoğlu
- c Biochemistry Department , Ankara Numune Education and Research Hospital , Ankara , Turkey , and
| | - Murat Alışık
- d Department of Biochemistry , Medical Faculty, Yildirim Beyazit University , Ankara , Turkey
| | - Özcan Erel
- d Department of Biochemistry , Medical Faculty, Yildirim Beyazit University , Ankara , Turkey
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Sousa L, Garcia IJP, Costa TGF, Silva LND, Renó CO, Oliveira ES, Tilelli CQ, Santos LL, Cortes VF, Santos HL, Barbosa LA. Effects of Iron Overload on the Activity of Na,K-ATPase and Lipid Profile of the Human Erythrocyte Membrane. PLoS One 2015. [PMID: 26197432 PMCID: PMC4510300 DOI: 10.1371/journal.pone.0132852] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Iron is an essential chemical element for human life. However, in some pathological conditions, such as hereditary hemochromatosis type 1 (HH1), iron overload induces the production of reactive oxygen species that may lead to lipid peroxidation and a change in the plasma-membrane lipid profile. In this study, we investigated whether iron overload interferes with the Na,K-ATPase activity of the plasma membrane by studying erythrocytes that were obtained from the whole blood of patients suffering from iron overload. Additionally, we treated erythrocytes of normal subjects with 0.8 mM H2O2 and 1 μM FeCl3 for 24 h. We then analyzed the lipid profile, lipid peroxidation and Na,K-ATPase activity of plasma membranes derived from these cells. Iron overload was more frequent in men (87.5%) than in women and was associated with an increase (446%) in lipid peroxidation, as indicated by the amount of the thiobarbituric acid reactive substances (TBARS) and an increase (327%) in the Na,K-ATPase activity in the plasma membrane of erythrocytes. Erythrocytes treated with 1 μM FeCl3 for 24 h showed an increase (132%) in the Na,K-ATPase activity but no change in the TBARS levels. Iron treatment also decreased the cholesterol and phospholipid content of the erythrocyte membranes and similar decreases were observed in iron overload patients. In contrast, erythrocytes treated with 0.8 mM H2O2 for 24 h showed no change in the measured parameters. These results indicate that erythrocytes from patients with iron overload exhibit higher Na,K-ATPase activity compared with normal subjects and that this effect is specifically associated with altered iron levels.
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Affiliation(s)
- Leilismara Sousa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Israel J. P. Garcia
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Tamara G. F. Costa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Lilian N. D. Silva
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Cristiane O. Renó
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Eneida S. Oliveira
- Laboratório de Biologia Molecular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Cristiane Q. Tilelli
- Laboratório de Estudos em Neurociências das Epilepsias e Comorbidades, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Luciana L. Santos
- Laboratório de Biologia Molecular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Vanessa F. Cortes
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Herica L. Santos
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
| | - Leandro A. Barbosa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho 400, 35501–296, Divinópolis, Brazil
- * E-mail:
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Viskupicova J, Blaskovic D, Galiniak S, Soszyński M, Bartosz G, Horakova L, Sadowska-Bartosz I. Effect of high glucose concentrations on human erythrocytes in vitro. Redox Biol 2015; 5:381-387. [PMID: 26141922 PMCID: PMC4506982 DOI: 10.1016/j.redox.2015.06.011] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 06/20/2015] [Accepted: 06/21/2015] [Indexed: 01/17/2023] Open
Abstract
Exposure to high glucose concentrations in vitro is often employed as a model for understanding erythrocyte modifications in diabetes. However, effects of such experiments may be affected by glucose consumption during prolonged incubation and changes of cellular parameters conditioned by impaired energy balance. The aim of this study was to compare alterations in various red cell parameters in this type of experiment to differentiate between those affected by glycoxidation and those affected by energy imbalance. Erythrocytes were incubated with 5, 45 or 100 mM glucose for up to 72 h. High glucose concentrations intensified lipid peroxidation and loss of activities of erythrocyte enzymes (glutathione S-transferase and glutathione reductase). On the other hand, hemolysis, eryptosis, calcium accumulation, loss of glutathione and increase in the GSSG/GSH ratio were attenuated by high glucose apparently due to maintenance of energy supply to the cells. Loss of plasma membrane Ca2+-ATPase activity and decrease in superoxide production were not affected by glucose concentration, being seemingly determined by processes independent of both glycoxidation and energy depletion. These results point to the necessity of careful interpretation of data obtained in experiments, in which erythrocytes are subject to treatment with high glucose concentrations in vitro. Erythrocytes were incubated for up to 72 h in 5 mM, 45 mM and 100 mM glucose. High glucose concentrations intensified lipid peroxidation. High glucose attenuated hemolysis, eryptosis, Ca2+ accumulation and glutathione loss. Glucose is a glycating agent but also energy source. Results of exposure to high glucose should be interpreted with care.
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Affiliation(s)
- Jana Viskupicova
- Institute of Experimental Pharmacology and Toxicology, Slovak Academy of Sciences, Dubravska cesta 9, 841 01 Bratislava, Slovak Republic
| | - Dusan Blaskovic
- Institute of Experimental Pharmacology and Toxicology, Slovak Academy of Sciences, Dubravska cesta 9, 841 01 Bratislava, Slovak Republic
| | - Sabina Galiniak
- Department of Biochemistry and Cell Biology, Faculty of Biology and Agriculture, University of Rzeszow, Zelwerowicza St. 4, PL 35-601 Rzeszow, Poland
| | - Mirosław Soszyński
- Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska St. 141/143, 90-236 Lodz, Poland
| | - Grzegorz Bartosz
- Department of Biochemistry and Cell Biology, Faculty of Biology and Agriculture, University of Rzeszow, Zelwerowicza St. 4, PL 35-601 Rzeszow, Poland,; Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska St. 141/143, 90-236 Lodz, Poland
| | - Lubica Horakova
- Institute of Experimental Pharmacology and Toxicology, Slovak Academy of Sciences, Dubravska cesta 9, 841 01 Bratislava, Slovak Republic
| | - Izabela Sadowska-Bartosz
- Department of Biochemistry and Cell Biology, Faculty of Biology and Agriculture, University of Rzeszow, Zelwerowicza St. 4, PL 35-601 Rzeszow, Poland,.
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Bhagavathy S, Sumathi P. Stabilization of membrane bound ATPases and lipid peroxidation by carotenoids from Chlorococcum humicola in Benzo(a)pyrene induced toxicity. Asian Pac J Trop Biomed 2015; 2:380-4. [PMID: 23569934 DOI: 10.1016/s2221-1691(12)60060-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Revised: 09/27/2011] [Accepted: 10/14/2011] [Indexed: 10/28/2022] Open
Abstract
OBJECTIVE To identify the alteration of the membrane potential and the effect of carotenoid extracts from Chlorococcum humicola (C. humicola) on membrane bound ATPases and lipid peroxidation. METHODS The total carotenoids were extracted from C. humicola. Four groups of Swiss albino mice were treated as control, Benzo(a)pyrene [B(a)P], total carotenoids, B(a)P + total carotenoids respectively for a period of 60 days. Membrane lipid peroxidation and ATPases (Total ATPases, Ca(2+)- ATPases, Mg(2+) - ATPases, Na(+)K(+) - ATPase) were determined in lung, liver and erythrocyte samples. RESULTS The activity of total ATPase was found to be significantly increased in the B(a)P treated liver and lung tissue. Erythrocyte membrane also showed higher ATPase activity which was significantly reverted on total carotenoid treatment. CONCLUSIONS It can be concluded that the changes in membrane potential favour the functional deterioration of physiological system. The overall findings demonstrates that the animals post treated with carotenoid extract from C. humicola may maintains the alterations in membrane bound ATPase and lipid peroxidation in tissues against the carcinogenic chemical and hence aid in establishing the membrane potential action. Therefore C. humicola can be further extended to exploits its possible application for various health benefits as neutraceuticals and food additives.
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Affiliation(s)
- S Bhagavathy
- Bharathiar University, Coimbatore, Tamilnadu, India
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30
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Could Na,K-ATPase play a role in potassium leakage from irradiated erythrocytes? Clin Chim Acta 2014; 433:58-61. [DOI: 10.1016/j.cca.2014.02.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 02/01/2014] [Accepted: 02/25/2014] [Indexed: 11/23/2022]
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Goldani AAS, Downs SR, Widjaja F, Lawton B, Hendren RL. Biomarkers in autism. Front Psychiatry 2014; 5:100. [PMID: 25161627 PMCID: PMC4129499 DOI: 10.3389/fpsyt.2014.00100] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 07/22/2014] [Indexed: 12/20/2022] Open
Abstract
Autism spectrum disorders (ASDs) are complex, heterogeneous disorders caused by an interaction between genetic vulnerability and environmental factors. In an effort to better target the underlying roots of ASD for diagnosis and treatment, efforts to identify reliable biomarkers in genetics, neuroimaging, gene expression, and measures of the body's metabolism are growing. For this article, we review the published studies of potential biomarkers in autism and conclude that while there is increasing promise of finding biomarkers that can help us target treatment, there are none with enough evidence to support routine clinical use unless medical illness is suspected. Promising biomarkers include those for mitochondrial function, oxidative stress, and immune function. Genetic clusters are also suggesting the potential for useful biomarkers.
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Affiliation(s)
| | - Susan R Downs
- Department of Psychiatry, University of California San Francisco , San Francisco, CA , USA
| | - Felicia Widjaja
- Department of Psychiatry, University of California San Francisco , San Francisco, CA , USA
| | - Brittany Lawton
- Department of Psychiatry, University of California San Francisco , San Francisco, CA , USA
| | - Robert L Hendren
- Department of Psychiatry, University of California San Francisco , San Francisco, CA , USA
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32
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Rodrigo R, Libuy M, Feliú F, Hasson D. Oxidative stress-related biomarkers in essential hypertension and ischemia-reperfusion myocardial damage. DISEASE MARKERS 2013; 35:773-90. [PMID: 24347798 PMCID: PMC3856219 DOI: 10.1155/2013/974358] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Accepted: 10/07/2013] [Indexed: 12/22/2022]
Abstract
Cardiovascular diseases are a leading cause of mortality and morbidity worldwide, with hypertension being a major risk factor. Numerous studies support the contribution of reactive oxygen and nitrogen species in the pathogenesis of hypertension, as well as other pathologies associated with ischemia/reperfusion. However, the validation of oxidative stress-related biomarkers in these settings is still lacking and novel association of these biomarkers and other biomarkers such as endothelial progenitor cells, endothelial microparticles, and ischemia modified albumin, is just emerging. Oxidative stress has been suggested as a pathogenic factor and therapeutic target in early stages of essential hypertension. Systolic and diastolic blood pressure correlated positively with plasma F2-isoprostane levels and negatively with total antioxidant capacity of plasma in hypertensive and normotensive patients. Cardiac surgery with extracorporeal circulation causes an ischemia/reperfusion event associated with increased lipid peroxidation and protein carbonylation, two biomarkers associated with oxidative damage of cardiac tissue. An enhancement of the antioxidant defense system should contribute to ameliorating functional and structural abnormalities derived from this metabolic impairment. However, data have to be validated with the analysis of the appropriate oxidative stress and/or nitrosative stress biomarkers.
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Affiliation(s)
- Ramón Rodrigo
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Independencia 1027, Casilla 70058, Santiago 7, Chile
| | - Matías Libuy
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Independencia 1027, Casilla 70058, Santiago 7, Chile
| | - Felipe Feliú
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Independencia 1027, Casilla 70058, Santiago 7, Chile
| | - Daniel Hasson
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Independencia 1027, Casilla 70058, Santiago 7, Chile
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Maia GAS, Renó CDO, Medina JM, Silveira ABD, Mignaco JA, Atella GC, Cortes VF, Barbosa LA, Santos HDL. The effect of gamma radiation on the lipid profile of irradiated red blood cells. Ann Hematol 2013; 93:753-60. [PMID: 24218190 DOI: 10.1007/s00277-013-1944-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 10/22/2013] [Indexed: 01/10/2023]
Abstract
An investigation into the effects of irradiation and of the storage time on aging and quality are a relevant issue to ensure the safety and the efficiency of irradiation in the prevention of transfusion-associated graft-versus-host disease (TA-GVHD). In this work, the biochemical properties and alterations presented by erythrocyte membranes, up to 28-days post-irradiation, with a dose of 25 Gy, were studied as a function of storage and post-irradiation time. There was a considerable variation in the total of phospholipid content, when comparing the control and irradiated samples, mostly from the third day onwards; and at the same time, the effect occurred as a function on the storage time of blood bags. The levels of total cholesterol decreased 3-9 days after irradiation. TBARS levels were increased after irradiation and 7 days of storage, but no increment of catalase activity was observed after the irradiation. Furthermore, the protein profile was maintained throughout the irradiation and storage time, until the 21st day, with the presence of a protein fragmentation band of around 28 kDa on the 28th day. In conclusion, although gamma irradiation is the main agent for the prevention of TA-GVHD, a better understanding of the physical and biochemical properties of erythrocytes are necessary to better assess their viability, and to be able to issue more secure recommendations on the shelf life of blood bags, and the safe use of the irradiated red cells therein.
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Affiliation(s)
- Grazielle Aparecida Silva Maia
- Faculdade de Bioquímica, Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, CEP, 35501-296, Divinópolis, Minas Gerais, Brazil
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Obradovic M, Bjelogrlic P, Rizzo M, Katsiki N, Haidara M, Stewart AJ, Jovanovic A, Isenovic ER. Effects of obesity and estradiol on Na+/K+-ATPase and their relevance to cardiovascular diseases. J Endocrinol 2013; 218:R13-23. [PMID: 23785175 DOI: 10.1530/joe-13-0144] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Obesity is associated with aberrant sodium/potassium-ATPase (Na(+)/K(+)-ATPase) activity, apparently linked to hyperglycemic hyperinsulinemia, which may repress or inactivate the enzyme. The reduction of Na(+)/K(+)-ATPase activity in cardiac tissue induces myocyte death and cardiac dysfunction, leading to the development of myocardial dilation in animal models; this has also been documented in patients with heart failure (HF). During several pathological situations (cardiac insufficiency and HF) and in experimental models (obesity), the heart becomes more sensitive to the effect of cardiac glycosides, due to a decrease in Na(+)/K(+)-ATPase levels. The primary female sex steroid estradiol has long been recognized to be important in a wide variety of physiological processes. Numerous studies, including ours, have shown that estradiol is one of the major factors controlling the activity and expression of Na(+)/K(+)-ATPase in the cardiovascular (CV) system. However, the effects of estradiol on Na(+)/K(+)-ATPase in both normal and pathological conditions, such as obesity, remain unclear. Increasing our understanding of the molecular mechanisms by which estradiol mediates its effects on Na(+)/K(+)-ATPase function may help to develop new strategies for the treatment of CV diseases. Herein, we discuss the latest data from animal and clinical studies that have examined how pathophysiological conditions such as obesity and the action of estradiol regulate Na(+)/K(+)-ATPase activity.
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Affiliation(s)
- Milan Obradovic
- Laboratory of Radiobiology and Molecular Genetics, Institute Vinca, University of Belgrade, PO Box 522, 11000 Belgrade, Serbia
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Oxidative Stress and Erythrocyte Membrane Alterations in Children with Autism: Correlation with Clinical Features. PLoS One 2013; 8:e66418. [PMID: 23840462 PMCID: PMC3686873 DOI: 10.1371/journal.pone.0066418] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 05/06/2013] [Indexed: 02/07/2023] Open
Abstract
It has been suggested that oxidative stress may play a role in the pathogenesis of Autism Spectrum Disorders (ASD), but the literature reports somewhat contradictory results. To further investigate the issue, we evaluated a high number of peripheral oxidative stress parameters, and some related issues such as erythrocyte membrane functional features and lipid composition. Twenty-one autistic children (Au) aged 5 to 12 years, were gender and age-matched with 20 typically developing children (TD). Erythrocyte thiobarbituric acid reactive substances, urinary isoprostane and hexanoyl-lysine adduct levels were elevated in Au, thus confirming the occurrence of an imbalance of the redox status of Au, whilst other oxidative stress markers or associated parameters (urinary 8-oxo-dG, plasma radical absorbance capacity and carbonyl groups, erythrocyte superoxide dismutase and catalase activities) were unchanged. A very significant reduction of Na+/K+-ATPase activity (−66%, p<0.0001), a reduction of erythrocyte membrane fluidity and alteration in erythrocyte fatty acid membrane profile (increase in monounsaturated fatty acids, decrease in EPA and DHA-ω3 with a consequent increase in ω6/ω3 ratio) were found in Au compared to TD, without change in membrane sialic acid content. Some Au clinical features appear to be correlated with these findings; in particular, hyperactivity score appears to be related with some parameters of the lipidomic profile and membrane fluidity. Oxidative stress and erythrocyte membrane alterations may play a role in the pathogenesis of ASD and prompt the development of palliative therapeutic protocols. Moreover, the marked decrease in NKA could be potentially utilized as a peripheral biomarker of ASD.
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Rodrigo R, Miranda-Merchak A, Valenzuela Grau R, Bachler JP, Vergara L. Modulation of (Na,K)-ATPase activity by membrane fatty acid composition: therapeutic implications in human hypertension. Clin Exp Hypertens 2013; 36:17-26. [DOI: 10.3109/10641963.2013.783048] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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37
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Zepeda RJ, Castillo R, Rodrigo R, Prieto JC, Aramburu I, Brugere S, Galdames K, Noriega V, Miranda HF. Effect of carvedilol and nebivolol on oxidative stress-related parameters and endothelial function in patients with essential hypertension. Basic Clin Pharmacol Toxicol 2012; 111:309-16. [PMID: 22703478 DOI: 10.1111/j.1742-7843.2012.00911.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Accepted: 05/14/2012] [Indexed: 12/14/2022]
Abstract
Oxidative stress and endothelial dysfunction have been associated with essential hypertension (EH) mechanisms. The purpose of this study was to evaluate the effect of carvedilol and nebivolol on the oxidative stress-related parameters and endothelial function in patients with EH. The studied population included 57 patients, either sex, between 30 and 75 years of age, with mild-to-moderate EH complications. Participants were randomized to receive either carvedilol (12.5 mg) (n = 23) or nebivolol (5 mg) (n = 21) for 12 weeks. Measurements included; 24-hr ambulatory blood pressure (BP), flow-mediated dilatation, levels of nitric oxide estimated as nitrite - a nitric oxide metabolite ( NO₂) - in plasma, and oxidative stress-related parameters in plasma and erythrocyte. EH patients who were treated with nebivolol or carvedilol showed systolic BP reductions of 17.4 and 19.9 mmHg, respectively, compared with baseline values (p < 0.01). Diastolic BP was reduced by 13.7 and 12.8 mmHg after the treatment with ebivolol and carvedilol, respectively (p < 0.01) (fig. 2B). Nebivolol and carvedilol showed 7.3% and 8.1% higher endothelium-dependent dilatation in relation to baseline values (p < 0.05). Ferric-reducing ability of plasma (FRAP) and reduced glutathione/oxidized glutathione (GSSH) ratio showed 31.5% and 29.6% higher levels in the carvedilol group compared with basal values; however, nebivolol-treated patients did not show significant differences after treatment. On the other hand, the NO₂ plasma concentration was not modified by the administration of carvedilol. However, nebivolol enhanced these levels in 62.1% after the treatment. In conclusion, this study demonstrated the antihypertensive effect of both beta-blockers. However, carvedilol could mediate these effects by an increase in antioxidant capacity and nebivolol through the raise in NO₂ concentration. Further studies are needed to determine the molecular mechanism of these effects.
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Affiliation(s)
- Ramiro J Zepeda
- Molecular and Clinical Pharmacology Program, Faculty of Medicine, Biomedical Sciences Institute, Universidad de Chile, Santiago, Chile.
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38
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Ameliorating effect of fish oil on acrylamide induced oxidative stress and neuronal apoptosis in cerebral cortex. Neurochem Res 2012; 37:1859-67. [PMID: 22648048 DOI: 10.1007/s11064-012-0794-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Revised: 04/06/2012] [Accepted: 04/27/2012] [Indexed: 12/30/2022]
Abstract
Acrylamide (ACR) is a known industrial toxic chemical that produce neurotoxicity characterized by progressive neuronal degeneration. This study was designed to investigate the protective effect of fish oil on ACR-induced neuronal damage in Wistar rats. ACR enhances the production of reactive oxygen species and potentially affects brain. ACR administered rats showed increased levels of lipid peroxidative product, protein carbonyl content, hydroxyl radical and hydroperoxide which were significantly modulated by the supplementation of fish oil. The activities of enzymic antioxidants and levels of reduced glutathione were markedly lowered in ACR-induced rats; fish oil treatment augmented these antioxidant levels in cortex. Free radicals generated during ACR administration reduced the activities of membrane adenosine triphosphatases and acetylcholine esterase. Fish oil enhanced the activities of these enzymes near normal level. Histological observation represented the protective role of fish oil in ACR-induced neuronal damage. Fish oil reduced the ACR-induced apoptosis through the modulation in expressions of B-cell lymphoma 2 (Bcl2)-associated X protein and Bcl2-associated death promoter. Further, fish oil increases the expression of heat shock protein 27 (Hsp27) in ACR-induced rats. This study provides evidence for the neuroprotective effect of fish oil on ACR-induced neurotoxicity by reducing oxidative stress and apoptosis with modulation in the expression of Hsp27.
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39
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Rodrigo R. Prevention of postoperative atrial fibrillation: novel and safe strategy based on the modulation of the antioxidant system. Front Physiol 2012; 3:93. [PMID: 22518106 PMCID: PMC3325031 DOI: 10.3389/fphys.2012.00093] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2012] [Accepted: 03/26/2012] [Indexed: 01/15/2023] Open
Abstract
Postoperative atrial fibrillation (AF) is the most common arrhythmia following cardiac surgery with extracorporeal circulation. The pathogenesis of postoperative AF is multifactorial. Oxidative stress, caused by the unavoidable ischemia-reperfusion event occurring in this setting, is a major contributory factor. Reactive oxygen species (ROS)-derived effects could result in lipid peroxidation, protein carbonylation, or DNA oxidation of cardiac tissue, thus leading to functional and structural myocardial remodeling. The vulnerability of myocardial tissue to the oxidative challenge is also dependent on the activity of the antioxidant system. High ROS levels, overwhelming this system, should result in deleterious cellular effects, such as the induction of necrosis, apoptosis, or autophagy. Nevertheless, tissue exposure to low to moderate ROS levels could trigger a survival response with a trend to reinforce the antioxidant defense system. Administration of n-3 polyunsaturated fatty acids (PUFA), known to involve a moderate ROS production, is consistent with a diminished vulnerability to the development of postoperative AF. Accordingly, supplementation of n-3 PUFA successfully reduced the incidence of postoperative AF after coronary bypass grafting. This response is due to an up-regulation of antioxidant enzymes, as shown in experimental models. In turn, non-enzymatic antioxidant reinforcement through vitamin C administration prior to cardiac surgery has also reduced the postoperative AF incidence. Therefore, it should be expected that a mixed therapy result in an improvement of the cardioprotective effect by modulating both components of the antioxidant system. We present novel available evidence supporting the hypothesis of an effective prevention of postoperative AF including a two-step therapeutic strategy: n-3 PUFA followed by vitamin C supplementation to patients scheduled for cardiac surgery with extracorporeal circulation. The present study should encourage the design of clinical trials aimed to test the efficacy of this strategy to offer new therapeutic opportunities to patients challenged by ischemia-reperfusion events not solely in heart, but also in other organs such as kidney or liver in transplantation surgeries.
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Affiliation(s)
- Ramón Rodrigo
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of ChileSantiago, Chile
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40
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Huang CF, Yang RS, Liu SH, Hsieh PC, Lin-Shiau SY. Evidence for Improved Neuropharmacological Efficacy and Decreased Neurotoxicity in Mice with Traditional Processing of Rhizoma Arisaematis. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2012; 39:981-98. [DOI: 10.1142/s0192415x11009354] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Rhizoma Arisaematis (RA, the rhizome of Pinellia pedatisecta Schott) is a traditional Chinese medicine commonly used in the treatment of convulsions, inflammation, and cancer. Despite the fact that it has been used for more than 2000 years, the pharmacological and toxic effects of traditionally processed products of RA are still unclear. In this study, we attempted to investigate the effects exerted by untreated crude RA and different preparations of RA treated with alumen in combination with ginger juice (Zhinanxing) or bile juice (Dannanxing) in ICR mice. The results showed that both the Zhinanxing and Dannanxing water extracts exerted significantly increased sedative effects, as indicated by the inhibitory effects on ambulatory distances, jumps, vertical-plane entries, and prolonged pentobarbital-induced sleeping time. The extracts also exerted significantly increased analgesic effects (increase of tail flick latency in nociceptive testing) in mice than did the unprocessed crude RA after oral administration for one to three days, and effects persisted 18 days after the cessation of treatment. By contrast, the toxic effects, such as an increase in stereotype-1 episodes of locomotor activities and reduction of the retention time on a rotating rod (motor equilibrium dysfunction), were observed only in mice treated with the unprocessed crude RA for three consecutive days, and effects persisted for 18 days after the cessation of treatment. These neurotoxic effects were accompanied by an increase in plasma lipid peroxidation (LPO), decrease in whole blood nitric oxide (NOx) levels, and inhibition of Na +/ K +-ATPase activities in membrane fractions of erythrocytes and in the cerebral cortex. In conclusion, these findings provide scientific evidence that the processed RA indeed possesses not only enhanced neuropharmacological efficacy but also reduced neurotoxic effects as compared to the unprocessed crude RA. The signaling of NO x/oxidative stress/ Na +- K +- ATPase activities played a role, at least in part, in the underlying mechanisms of neurotoxic effects induced by the crude RA.
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Affiliation(s)
- Chun-Fa Huang
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Rong-Sen Yang
- Department of Orthopedics, National Taiwan University Hospital, Taipei, Taiwan
| | - Shing-Hwa Liu
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Po-Chow Hsieh
- Division of Chinese Pharmacy, Committee on Chinese Medicine and Pharmacy, Department of Health, Executive Yuan, Taipei, Taiwan
| | - Shoei-Yn Lin-Shiau
- Institute of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan
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41
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Bornhorst J, Wehe CA, Hüwel S, Karst U, Galla HJ, Schwerdtle T. Impact of manganese on and transfer across blood-brain and blood-cerebrospinal fluid barrier in vitro. J Biol Chem 2012; 287:17140-17151. [PMID: 22457347 DOI: 10.1074/jbc.m112.344093] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Manganese occupational and dietary overexposure has been shown to result in specific clinical central nervous system syndromes, which are similar to those observed in Parkinson disease. To date, modes of neurotoxic action of Mn are still to be elucidated but are thought to be strongly related to Mn accumulation in brain and oxidative stress. However, the pathway and the exact process of Mn uptake in the brain are yet not fully understood. Here, two well characterized primary porcine in vitro models of the blood-brain and the blood-cerebrospinal fluid (CSF) barrier were applied to assess the transfer of Mn in the brain while monitoring its effect on the barrier properties. Thus, for the first time effects of MnCl(2) on the integrity of these two barriers as well as Mn transfer across the respective barriers are compared in one study. The data reveal a stronger Mn sensitivity of the in vitro blood-CSF barrier compared with the blood-brain barrier. Very interestingly, the negative effects of Mn on the structural and functional properties of the highly Mn-sensitive blood-CSF barrier were partly reversible after incubation with calcium. In summary, both the observed stronger Mn sensitivity of the in vitro blood-CSF barrier and the observed site-directed, most probably active, Mn transport toward the brain facing compartment, reveal that, in contrast to the general assumption in literature, after oral Mn intake the blood-CSF barrier might be the major route for Mn into the brain.
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Affiliation(s)
- Julia Bornhorst
- Graduate School of Chemistry, the University of Münster, 48149 Münster, Germany; Institute of Food Chemistry, the University of Münster, 48149 Münster, Germany
| | - Christoph A Wehe
- Institute of Inorganic and Analytical Chemistry, the University of Münster, 48149 Münster, Germany
| | - Sabine Hüwel
- Institute of Biochemistry, the University of Münster, 48149 Münster, Germany
| | - Uwe Karst
- Institute of Inorganic and Analytical Chemistry, the University of Münster, 48149 Münster, Germany
| | - Hans-Joachim Galla
- Institute of Biochemistry, the University of Münster, 48149 Münster, Germany
| | - Tanja Schwerdtle
- Institute of Food Chemistry, the University of Münster, 48149 Münster, Germany.
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Cuello S, Ximénez-Embún P, Ruppen I, Schonthaler HB, Ashman K, Madrid Y, Luque-Garcia JL, Cámara C. Analysis of protein expression in developmental toxicity induced by MeHg in zebrafish. Analyst 2012; 137:5302-11. [DOI: 10.1039/c2an35913h] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Chtourou Y, Trabelsi K, Fetoui H, Mkannez G, Kallel H, Zeghal N. Manganese induces oxidative stress, redox state unbalance and disrupts membrane bound ATPases on murine neuroblastoma cells in vitro: protective role of silymarin. Neurochem Res 2011; 36:1546-57. [PMID: 21533646 PMCID: PMC3139064 DOI: 10.1007/s11064-011-0483-5] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2011] [Indexed: 02/07/2023]
Abstract
Manganese (Mn) is an essential trace element required for ubiquitous enzymatic reactions. Chronic overexposure to this metal may promote potent neurotoxic effects. The mechanism of Mn toxicity is not well established, but several studies indicate that oxidative stress play major roles in the Mn-induced neurodegenerative processes. Silymarin (SIL) has antioxidant properties and stabilizes intracellular antioxidant defense systems. The aim of this study was to evaluate the toxic effects of MnCl2 on the mouse neuroblastoma cell lines (Neuro-2A), to characterize the toxic mechanism associated with Mn exposure and to investigate whether SIL could efficiently protect against neurotoxicity induced by Mn. A significant increase in LDH release activity was observed in Neuro-2A cells associated with a significant decrease in cellular viability upon 24 h exposure to MnCl2 at concentrations of 200 and 800 μM (P < 0.05) when compared with control unexposed cells. In addition, exposure cells to MnCl2 (200 and 800 μM), increases oxidant biomarkers and alters enzymatic and non enzymatic antioxidant systems. SIL treatment significantly reduced the levels of LDH, nitric oxide, reactive oxygen species and the oxidants/antioxidants balance in Neuro-2A cells as compared to Mn-exposed cells. These results suggested that silymarin is a powerful antioxidant through a mechanism related to its antioxidant activity, able to interfere with radical-mediated cell death. SIL may be useful in diseases known to be aggravated by reactive oxygen species and in the development of novel treatments for neurodegenerative disorders such as Alzheimer or Parkinson diseases.
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Affiliation(s)
- Yassine Chtourou
- Animal Physiology Laboratory, Life Sciences Department, Faculty of Sciences, UR/08-73, Sfax University, BP 1171, 3000, Sfax, Tunisia
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Huang CF, Liu SH, Hsu CJ, Lin-Shiau SY. Neurotoxicological effects of low-dose methylmercury and mercuric chloride in developing offspring mice. Toxicol Lett 2010; 201:196-204. [PMID: 21195143 DOI: 10.1016/j.toxlet.2010.12.016] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2010] [Revised: 12/16/2010] [Accepted: 12/20/2010] [Indexed: 11/16/2022]
Abstract
Mercury is a well-known toxic metal and potently induces severe neurotoxicological effects, especially in infants and children. The purpose of this study was to explore the underlying mechanisms of neurotoxic effects of mercurial compounds on the different stages of developing mice. Low-doses (the probability of human exposure in mercury-contaminated areas) of methylmercury (MeHg) (M, 0.02mg/kg/day) and mercury chloride (HgCl(2)) (H, 0.5mg/kg/day) were administered to mice of the following groups: (1) treatment with distilled water for 7 consecutive weeks after weaning (control-vehicle (CV)); exposure to mercurial compounds at different stages; (2) for 7 consecutive weeks after weaning (control-MeHg (CM) and control-HgCl(2) (CH)); (3) only during perinatal and weaning stages (MeHg-vehicle (MV) and HgCl-vehicle (HV)); and (4) in all experimental stages (MeHg-MeHg (MM) and HgCl(2)-HgCl(2) (HH)). Results revealed the neurobehavioral defects (increased locomotor activities, motor equilibrium impairment, and auditory dysfunction) that correlated with increasing Hg accumulation in CM and CH groups. However, it revealed a decrease and an increase in locomotor activities in MV and HV groups, respectively; these became more severe in MM and HH groups than in MV and HV groups. Motor equilibrium performance in MV and HV groups remained normal, while that in MM and HH groups was decreased. The most severe auditory defects (altered auditory brainstem response, ABR test) found in MM and HH groups than those in the respective CM and CH, MV and HV, including absolute wave III delays and interwave I-III latencies, which suggested that the irreversible auditory dysfunction caused by mercurial compounds. Furthermore, the alteration of lipid peroxidation (LPO), Na(+)/K(+)-ATPase activities, and nitric oxide (NO(x)) in the brain tissues contributed to the observed neurobehavioral dysfunction and hearing impairment. These findings provide evidence that fetuses were much more susceptible to the effects of mercurial compounds with regard to inducing severely neurotoxicological injuries as that found in human beings. The signaling of ROS/Na(+)-K(+)-ATPase/NO(x) plays a crucial role in the underlying mechanism for mercurial compound-induced toxic effects in offspring.
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Affiliation(s)
- Chun-Fa Huang
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
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45
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Pérez-Hernández IH, Avendaño-Flores YS, Mejía-Zepeda R. Analysis of the membrane fluidity of erythrocyte ghosts in diabetic, spontaneously hypertensive rats. Acta Diabetol 2010; 47 Suppl 1:47-55. [PMID: 19404568 DOI: 10.1007/s00592-009-0120-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 04/06/2009] [Indexed: 10/20/2022]
Abstract
Diabetes and hypertension are closely related diseases associated with changes in membrane fluidity. Here, we measured the membrane fluidity of erythrocyte ghosts from spontaneously hypertensive rats (SHR), with or without streptozotocin (STZ)-induced diabetes, at the ages of 1, 3 and 6 months, by introducing the use of the intramolecular excimer forming dipyrenylpropane (DPyP) in this model. Type 2 diabetes mellitus (T2DM) was induced in 48-h-old, newborn male SHR by intraperitoneal injection of STZ. We found lower excimer to monomer (I (e)/I (m)) DPyP ratios in diabetic SHR than in control SHR at 3 and 6 months old, indicating a decrease in membrane fluidity. Simultaneously, the composition of fatty acids was determined and it was found that the unsaturated to saturated fatty acids ratio (U/S) was compatible with changes in membrane fluidity. These results suggest that the change in fatty acid composition of erythrocyte ghosts contributes significantly to the decreased membrane fluidity detected with DPyP in diabetic SHR.
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Affiliation(s)
- Ismael H Pérez-Hernández
- Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Av de los Barrios No 1 Los Reyes Iztacala, CP 54090 Tlalnepantla, Estado de México, Mexico
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Staroń A, Mąkosa G, Koter-Michalak M. Oxidative stress in erythrocytes from patients with rheumatoid arthritis. Rheumatol Int 2010; 32:331-4. [PMID: 21082319 PMCID: PMC3264880 DOI: 10.1007/s00296-010-1611-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Accepted: 10/13/2010] [Indexed: 11/15/2022]
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease characterized by chronic inflammation. It has been suggested that the level of reactive oxygen species (ROS) in patients with RA is higher than in healthy subjects. The aim of the present study was to investigate the level of the lipid peroxidation, antioxidant enzyme activities (CAT, SOD, GSH-Px), level of the –SH groups and GSH and Na+K+ ATPase activity in erythrocytes from patients with RA. There are no significant differences in CAT and GSH-Px activities. SOD activity is lower in RA patients than in the control group. Increase in the lipid peroxidation is observed in RA patients. Levels of the GHS and –SH groups are significantly lower in RA patients than in the control groups. Total ATPase and Na+K+ ATPase activities decrease in RA patients.
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47
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Azam SS, Hofer TS, Randolf BR, Rode BM. Hydration of sodium(I) and potassium(I) revisited: a comparative QM/MM and QMCF MD simulation study of weakly hydrated ions. J Phys Chem A 2010; 113:1827-34. [PMID: 19203258 DOI: 10.1021/jp8093462] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Quantum mechanical/molecular mechanical (QM/MM) and quantum mechanical charge field (QMCF) molecular (MD) simulations have been performed to describe structural and dynamical properties of Na(I) and K(I) in water and to compare the two approaches. The first and second hydration shells were treated by ab initio quantum mechanics at the restricted Hartree-Fock (RHF) level. The structural data are in good agreement with previously published experimental and theoretical results. A considerable number of water exchange reactions were observed within the first shell during the simulation time of 12 ps. The number of exchange events in both shells is higher in the case of K(I) than Na(I) reflecting the weaker ion-ligand bond strength of K(I). Comparison of the "conventional" QM/MM framework with the QMCF method clearly indicates the latter to be advantageous, as ambiguities arising from the coupling of the subregions occurring in the QM/MM MD simulations did not evolve when the QMCF ansatz was applied.
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Affiliation(s)
- S Sikander Azam
- Theoretical Chemistry Division Institute of General, Inorganic and Theoretical Chemistry University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
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Toklu HZ, Sehirli O, Erşahin M, Süleymanoğlu S, Yiğiner O, Emekli-Alturfan E, Yarat A, Yeğen BÇ, Sener G. Resveratrol improves cardiovascular function and reduces oxidative organ damage in the renal, cardiovascular and cerebral tissues of two-kidney, one-clip hypertensive rats. J Pharm Pharmacol 2010; 62:1784-93. [PMID: 21054406 DOI: 10.1111/j.2042-7158.2010.01197.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVES The putative protective effects of resveratrol against oxidative injury in the heart, kidney and brain tissues of rats induced with the two-kidney, one-clip (2K1C) hypertension model were investigated. METHODS Wistar albino rats were divided into sham-operated (n = 8) or 2K1C groups, in which rats received either resveratrol (10 mg/kg per day, i.p., n = 8), or saline (n = 8) starting at Week 3 after the surgery and continuing for the following 6 weeks. Indirect blood pressure recordings and echocardiographic images were made to evaluate cardiac function. At the end of Week 9 the animals were decapitated and plasma, heart, kidney and brain were taken for biochemical assays, while aortic rings were prepared for vascular reactivity studies. KEY FINDINGS 2K1C hypertension resulted in increased blood pressure, aortic hypercontractility and reduced left ventricular function, leading to increased lipid peroxidation and myeloperoxidase activity, concomitant with significant reductions in tissue glutathione, superoxide dismutase, Na+/K+-ATPase and catalase activities in the cardiac, renal and brain tissues, indicating the presence of oxidative tissue damage in peripheral target organs. Elevated plasma levels of lactate dehydrogenase, creatine kinase, as well as reduced plasma levels of antioxidant capacity and nitric oxide further verified the severity of oxidative injury. A 6-week treatment with resveratrol reversed all the measured parameters, ameliorated hypertension-induced oxidative injury in the target organs and improved cardiovascular function. CONCLUSIONS Resveratrol improved cardiovascular function through the augmentation of endogenous antioxidants and the inhibition of lipid peroxidation by maintaining a balance in oxidant/antioxidant status, which also ameliorated hypertension-induced oxidative injury in the cardiac, renal and cerebral tissues.
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Affiliation(s)
- Hale Z Toklu
- Department of Pharmacology, Marmara University School of Pharmacy, Istanbul, Turkey
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Megli FM, Conte E, Russo L. Comparative 5-doxylstearoyllecithin and 3-doxylcholestane EPR spin labeling study of phospholipid bilayer perturbation by different oxidized lecithin species. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1886-98. [DOI: 10.1016/j.bbamem.2010.06.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Revised: 06/17/2010] [Accepted: 06/17/2010] [Indexed: 01/25/2023]
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50
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