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Zerillo L, Polvere I, Stilo R, Vito P, Rinaldi M, Zotti T, Costagliola C. Diverse effects of synthetic glucocorticoid species on cell viability and stress response of neuroblastoma cells. Neuroscience 2024; 554:1-10. [PMID: 39002754 DOI: 10.1016/j.neuroscience.2024.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 06/07/2024] [Accepted: 07/07/2024] [Indexed: 07/15/2024]
Abstract
Glucocorticoids (GCs) are widely used as powerful anti-inflammatory and immunosuppressive therapeutics in multiple pathological conditions. However, compelling evidence indicates that they might promote neurodegeneration by altering mitochondrial homeostatic processes. Although the effect of dexamethasone on cell survival and homeostasis has been widely investigated, the effect of other glucocorticoids needs to be explored in more detail. In this report, we have compared the neurotoxicity induced by dexamethasone, prednisolone, betamethasone, and hydrocortisone in cultured neuroblastoma cells, through the analysis of several parameters such as cell viability, ER stress, oxidative stress, and mitochondrial fusion and fission markers. Interestingly, we have found that synthetic glucocorticoids may impact neuronal viability by affecting different cellular responses, suggesting that their therapeutic use should be consciously decided after careful consideration of benefits and detrimental effects.
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Affiliation(s)
- Lucrezia Zerillo
- Department of Science and Technology, University of Sannio, Benevento, 82100, Italy; Genus Biotech, University of Sannio, Benevento, 82100, Italy
| | | | - Romania Stilo
- Department of Science and Technology, University of Sannio, Benevento, 82100, Italy
| | - Pasquale Vito
- Department of Science and Technology, University of Sannio, Benevento, 82100, Italy; Genus Biotech, University of Sannio, Benevento, 82100, Italy
| | - Michele Rinaldi
- Department of Neurosciences and Reproductive and Odontostomatological Sciences, University of Naples "Federico II", Naples, 80131, Italy.
| | - Tiziana Zotti
- Department of Science and Technology, University of Sannio, Benevento, 82100, Italy.
| | - Ciro Costagliola
- Department of Neurosciences and Reproductive and Odontostomatological Sciences, University of Naples "Federico II", Naples, 80131, Italy
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Ambwani S, Dolma R, Sharma R, Kaur A, Singh H, Ruj A, Ambwani TK. Modulation of inflammatory and oxidative stress biomarkers due to dexamethasone exposure in chicken splenocytes. Vet Immunol Immunopathol 2023; 262:110632. [PMID: 37517103 DOI: 10.1016/j.vetimm.2023.110632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/10/2023] [Accepted: 07/24/2023] [Indexed: 08/01/2023]
Abstract
Dexamethasone (DEXA) is a potent corticosteroid, commonly used for treating inflammatory, hypersensitive and allergic conditions. It is administered to birds with tumours. Many studies were conducted on its immunosuppressive effects; however none of the similar study is available employing chicken splenocytes culture system. The present study was conducted to assess DEXA induced alterations in inflammatory and oxidative stress biomarkers in chicken splenocytes due to its in vitro exposure. The maximum non-cytotoxic dose (MNCD) was evaluated and was further used for conducting lymphocytes proliferation assay (LPA), antioxidant assays (lipid peroxidation, GSH, superoxide dismutase and nitric oxide assays) and assessment of mRNA levels of various genes (IL-1β, IL-6, IL-10, LITAF, iNOS, NF-κB1, Nrf-2, Caspase-3 and -9) through qPCR. The MNCD was determined to be 30 ng/ml in chicken splenocytes culture system. DEXA caused reduction in B and T lymphocytes proliferation indicating its immunosuppressive effects, however improved the antioxidant status of the exposed splenocytes. The expression levels of IL-1β, IL-6, iNOS, LITAF and NF-κB1 were significantly reduced while IL-10 was enhanced, which signify potent anti-inflammatory potential of DEXA. NF-κB is a major transcription factor that regulates genes responsible for both, innate and adaptive immune responses and elicits inflammation. The nuclear factor erythroid 2-related factor 2 (Nrf-2) level was found to be up-regulated. Nrf-2 plays important role in combating the oxidant stress and its increased expression could be the reason of improved antioxidant status of DEXA exposed cells. Present findings indicated that DEXA exhibited modulation in anti-inflammatory, immunomodulatory and antioxidant mediators in chicken splenocytes.
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Affiliation(s)
- Sonu Ambwani
- Department of Molecular Biology and Genetic Engineering, C.B.S.H., Govind Ballabh Pant University of Agriculture & Technology, Pantnagar 263145, Uttarakhand, India.
| | - Rigzin Dolma
- Department of Molecular Biology and Genetic Engineering, C.B.S.H., Govind Ballabh Pant University of Agriculture & Technology, Pantnagar 263145, Uttarakhand, India
| | - Raunak Sharma
- Department of Molecular Biology and Genetic Engineering, C.B.S.H., Govind Ballabh Pant University of Agriculture & Technology, Pantnagar 263145, Uttarakhand, India
| | - Amandip Kaur
- Department of Molecular Biology and Genetic Engineering, C.B.S.H., Govind Ballabh Pant University of Agriculture & Technology, Pantnagar 263145, Uttarakhand, India
| | - Himani Singh
- Department of Molecular Biology and Genetic Engineering, C.B.S.H., Govind Ballabh Pant University of Agriculture & Technology, Pantnagar 263145, Uttarakhand, India
| | - Anamitra Ruj
- Department of Molecular Biology and Genetic Engineering, C.B.S.H., Govind Ballabh Pant University of Agriculture & Technology, Pantnagar 263145, Uttarakhand, India
| | - Tanuj Kumar Ambwani
- Department of Veterinary Physiology and Biochemistry, C.V.A.S., Govind Ballabh Pant University of Agriculture & Technology, Pantnagar 263145, Uttarakhand, India
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The Electrical Stimulation of the Bed Nucleus of the Stria Terminalis Causes Oxidative Stress in Skeletal Muscle of Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:4671213. [PMID: 29955246 PMCID: PMC6000852 DOI: 10.1155/2018/4671213] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/25/2018] [Accepted: 05/14/2018] [Indexed: 01/24/2023]
Abstract
Recent studies indicate that activation of hypothalamus-pituitary-adrenocortical axis (HPA) plays the crucial role in stress response, while several lines of evidence mark the bed nucleus of the stria terminalis (BST) as a major mediator of the HPA axis responses to stress. The purpose of this study was to investigate the influence of the corticosterone flux induced by the electrical stimulation of BST on markers of free radical damage of lipids and proteins and antioxidant enzyme activity in skeletal muscle of rats. The male Wistar rats were used and assigned to one of three groups: sham-operated (SHM; n = 6), two-week (ST2; n = 6), and four-week stimulated (ST4; n = 5) groups. Blood, soleus, and extensor digitorum longus muscles were collected. The chronic, 4-week electrical stimulation of the BST evokes increased plasma corticosterone concentration, which resulted in oxidative stress in skeletal muscles. We found higher level of lipid peroxidation markers, lower level of protein oxidation marker, and elevated antioxidant enzyme activity in both muscles. Our findings have also potential implication showing that reaction to the long-term “psychological stress” may lead to free radical damage of muscle.
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Proteomic analysis reveals the important roles of alpha-5-collagen and ATP5β during skin ulceration syndrome progression of sea cucumber Apostichopus japonicus. J Proteomics 2018; 175:136-143. [DOI: 10.1016/j.jprot.2018.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/23/2017] [Accepted: 01/04/2018] [Indexed: 12/13/2022]
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Lv ZP, Peng YZ, Zhang BB, Fan H, Liu D, Guo YM. Glucose and lipid metabolism disorders in the chickens with dexamethasone-induced oxidative stress. J Anim Physiol Anim Nutr (Berl) 2017; 102:e706-e717. [DOI: 10.1111/jpn.12823] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 08/29/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Z.-P. Lv
- State Key Laboratory of Animal Nutrition; College of Animal Science & Technology; China Agricultural University; Beijing China
| | - Y.-Z. Peng
- State Key Laboratory of Animal Nutrition; College of Animal Science & Technology; China Agricultural University; Beijing China
| | - B.-B. Zhang
- State Key Laboratory of Animal Nutrition; College of Animal Science & Technology; China Agricultural University; Beijing China
| | - H. Fan
- State Key Laboratory of Animal Nutrition; College of Animal Science & Technology; China Agricultural University; Beijing China
| | - D. Liu
- State Key Laboratory of Animal Nutrition; College of Animal Science & Technology; China Agricultural University; Beijing China
| | - Y.-M. Guo
- State Key Laboratory of Animal Nutrition; College of Animal Science & Technology; China Agricultural University; Beijing China
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Hellberg L, Samavedam UK, Holdorf K, Hänsel M, Recke A, Beckmann T, Steinhorst K, Boehncke WH, Kirchner T, Möckel N, Solbach W, Zillikens D, Schmidt E, Ludwig RJ, Laskay T. Methylprednisolone Blocks Autoantibody-Induced Tissue Damage in Experimental Models of Bullous Pemphigoid and Epidermolysis Bullosa Acquisita through Inhibition of Neutrophil Activation. J Invest Dermatol 2013; 133:2390-2399. [DOI: 10.1038/jid.2013.91] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 12/16/2012] [Accepted: 01/29/2013] [Indexed: 12/18/2022]
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Costantini D, Marasco V, Møller AP. A meta-analysis of glucocorticoids as modulators of oxidative stress in vertebrates. J Comp Physiol B 2011; 181:447-56. [PMID: 21416253 DOI: 10.1007/s00360-011-0566-2] [Citation(s) in RCA: 133] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 02/27/2011] [Accepted: 03/03/2011] [Indexed: 01/01/2023]
Abstract
Prolonged high secretion of glucocorticoids normally reflects a state of chronic stress, which has been associated with an increase in disease susceptibility and reduction in Darwinian fitness. Here, we hypothesize that an increase in oxidative stress accounts for the detrimental effects of prolonged high secretion of glucocorticoids. We performed a meta-analysis on studies where physiological stress was induced by administration of glucocorticoids to evaluate the magnitude of their effects on oxidative stress. Glucocorticoids have a significant effect on oxidative stress (Pearson r = 0.552), although this effect depends on the duration of treatment, and is larger in long-term experiments. Importantly, there was a significant effect on tissue, with brain and heart being the most and the least susceptible to GC-induced oxidative stress, respectively. Furthermore, effect size was larger (1) in studies using both sexes compared to males only, (2) when corticosterone rather than dexamethasone was administered and (3) in juveniles than in adults. These effects were not confounded by species, biochemical biomarker, or whether wild or laboratory animals were studied. In conclusion, our meta-analysis suggests that GC-induced oxidative stress could be a further mechanism underlying increases in disease susceptibility and decreases in Darwinian fitness observed under chronic stress.
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Affiliation(s)
- David Costantini
- Institute for Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Graham Kerr Building, Glasgow, G12 8QQ, UK.
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Proteomic analysis of rat retina in a steroid-induced ocular hypertension model: potential vulnerability to oxidative stress. Jpn J Ophthalmol 2008; 52:84-90. [PMID: 18626730 DOI: 10.1007/s10384-007-0507-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2007] [Accepted: 09/17/2007] [Indexed: 10/22/2022]
Abstract
PURPOSE To investigate global protein expression profiles in the retinas of normal and glucocorticoid-induced ocular hypertensive rats by proteomic analysis. METHODS Ocular hypertension was induced by topical application of dexamethasone (DEX) for 4 weeks. Age-matched untreated rats served as controls. Intraocular pressure (IOP) was monitored by an electronic tonometer. Retinal protein expression profiling was carried out by two-dimensional fluorescence difference gel electrophoresis (2-D DIGE). Proteins were identified by matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry. RESULTS In DEX-treated rats, average IOP was elevated significantly compared with controls. With DEX treatment, levels of four proteins were altered, as revealed by 2-D DIGE and MALDI-TOF mass spectrometry: apolipoprotein A1 (apoA1), a lipid-binding protein, upregulated 1.9-fold, P < 0.05; alpha A crystallin (CRYAA), a molecular chaperone, downregulated 2.7-fold, P < 0.01; superoxide dismutase 1 (SOD1), an antioxidant enzyme, downregulated 2.3-fold, P < 0.05; and triosephosphate isomerase 1 (TPI1), a glycolytic enzyme, downregulated 2.3-fold, P < 0.01. CONCLUSIONS Downregulation of CRYAA, SOD1, and TPI1, observed here after a short period of DEX-induced ocular hypertension, may be involved in the onset of neural damage in steroid-induced glaucoma.
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Buttler K, Ezaki T, Wilting J. Proliferating mesodermal cells in murine embryos exhibiting macrophage and lymphendothelial characteristics. BMC DEVELOPMENTAL BIOLOGY 2008; 8:43. [PMID: 18430230 PMCID: PMC2375885 DOI: 10.1186/1471-213x-8-43] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2008] [Accepted: 04/22/2008] [Indexed: 01/02/2023]
Abstract
BACKGROUND The data on the embryonic origin of lymphatic endothelial cells (LECs) from either deep embryonic veins or mesenchymal (or circulating) lymphangioblasts presently available remain inconsistent. In various vertebrates, markers for LECs are first expressed in specific segments of embryonic veins arguing for a venous origin of lymph vessels. Very recently, studies on the mouse have strongly supported this view. However, in the chick, we have observed a dual origin of LECs from veins and from mesodermal lymphangioblasts. Additionally, in murine embryos we have detected mesenchymal cells that co-express LEC markers and the pan-leukocyte marker CD45. Here, we have characterized the mesoderm of murine embryos with LEC markers Prox1, Lyve-1 and LA102 in combination with macrophage markers CD11b and F4/80. RESULTS We observed cells co-expressing both types of markers (e.g. Prox1 - Lyve-1 - F4/80 triple-positive) located in the mesoderm, immediately adjacent to, and within lymph vessels. Our proliferation studies with Ki-67 antibodies showed high proliferative capacities of both the Lyve-1-positive LECs of lymph sacs/lymphatic sprouts and the Lyve-1-positive mesenchymal cells. CONCLUSION Our data argue for a dual origin of LECs in the mouse, although the primary source of embryonic LECs may reside in specific embryonic veins and mesenchymal lymphangioblasts integrated secondarily into lymph vessels. The impact of a dual source of LECs for ontogenetic, phylogenetic and pathological lymphangiogenesis is discussed.
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Affiliation(s)
- Kerstin Buttler
- Centre of Anatomy, Department of Anatomy and Cell Biology, University Medicine Goettingen, Goettingen, Germany.
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Li YJ, Shaw HM. Pregnenolone and dexamethasone, modulators of cytochrome P450-3A, not increase but reduce urinary alpha-CEHC excretion in rats. Biofactors 2007; 31:67-76. [PMID: 18806310 DOI: 10.1002/biof.5520310107] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In this study, the CYP3A inducer pregnenolone-16alpha-carbonitrile (PCN) and the CYP3A inhibitor ketoconazole (KCZ) were used to investigate whether the metabolism of alpha-tocopherol to its metabolite, alpha-carboxyethyl hydroxychroman (alpha-CEHC), is CYP3A-dependent in rats. In experiment 1, two groups of Wistar rats were fed for 3 wk with either a basal diet (containing 50 ppm of alpha-tocopherol) or the same diet containing 10-fold more alpha-tocopherol. In the last 3 days, each group was divided into 2 subgroups which were given a single i.p. injection of either PCN at 75 mg/kg/d (P50 & P500 groups) or DMSO (D50 & D500 groups). The liver TBARS concentration was highest in the P50 group. Two-way ANOVA analysis showed that alpha-tocopherol levels in the plasma and liver were both significantly decreased by PCN (p < 0.0001), as were alpha-CEHC levels in the urine (p = 0.0004). In experiment 2, alpha-tocopherol levels in the liver were increased and alpha-CEHC excretion in the urine decreased in the Wistar rats fed with KCZ containing diet. In experiment 3, Wistar rats administered with dexamethasone (DEX) significantly decreased alpha-tocopherol levels in the plasma and liver and alpha-CEHC levels in the urine. These data showed CYP3A is not a major contributor of the metabolism of alpha-tocopherol to alpha-CEHC. Nevertheless, vitamin E status was markedly reduced by CYP3A inducers due to increased lipid peroxidation and this would increase the consumption of alpha-tocopherol in the liver.
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Affiliation(s)
- Yi-Jen Li
- Laboratory of Nutritional Biochemistry, Institute of Microbiology and Biochemistry, National Taiwan University, Taipei, Taiwan
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Sadowska AM, Klebe B, Germonpré P, De Backer WA. Glucocorticosteroids as antioxidants in treatment of asthma and COPD. New application for an old medication? Steroids 2007; 72:1-6. [PMID: 17145070 DOI: 10.1016/j.steroids.2006.10.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Revised: 10/04/2006] [Accepted: 10/25/2006] [Indexed: 02/07/2023]
Abstract
Inhaled corticosteroids (ICS) are the standard of care in asthma and are widely used in the treatment of patients with COPD. The influence of steroids on inflammatory processes has long been established since glucocorticoids and their receptor belong to the regulatory network involved in inhibition of several inflammatory pathways. Inflammatory processes are usually accompanied by an increased oxidative burden followed by a depletion of antioxidants. Therefore, the effects of steroids on antioxidant status have been investigated revealing possible positive effects on the reduced antioxidant enzyme activity. Nevertheless, the mechanisms of this modulation have not been fully elucidated yet. It is possible that antioxidant enzyme activity is regulated at the level of transcription. Additionally, because of the fact that antioxidant enzymes are trace element dependent, steroids may affect their activity through influence on trace element accumulation. This review summarizes the effects of steroids on the antioxidant enzymes activity in vitro and in vivo in relation to asthma and COPD.
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Affiliation(s)
- A M Sadowska
- Department of Pulmonary Medicine, University of Antwerp, 2610 Antwerp, Belgium.
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Schmidt AJ, Krieg JC, Vedder H. Effects of steroid hormones on catalase activity in neuronal and glial cell systems. Eur Neuropsychopharmacol 2005; 15:177-83. [PMID: 15695062 DOI: 10.1016/j.euroneuro.2004.09.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2004] [Revised: 07/25/2004] [Accepted: 09/12/2004] [Indexed: 11/21/2022]
Abstract
The aim of the present study was to determine short- (1 and 3 h) and long-term (24 h) effects of glucocorticoids [GCs; corticosterone (CORT), dexamethasone (DEX) and 6-methylprednisolone (6-MP)] and gonadal steroids [GSs; 17beta-estradiol (E2), progesterone (PROG) and testosterone (TEST)] on the activity of the hydrogen-peroxide-detoxifying enzyme catalase (CAT) in neural hippocampal HT22 cells and glial C6 cells because such effects have been described in peripheral organ systems. In HT22 cells, only long-term treatment with glucocorticoids (10(-5) M) induced effects on catalase activity, whereas gonadal steroids (10(-5) M) affected catalase activity after both short- and long-term incubations. At a lower concentration of 10(-7) M, glucocorticoids exerted only short-term treatment effects on catalase activity, while gonadal steroids (10(-7) M) affected the enzyme activity after short- and long-term treatments. In C6 glial cells, both glucocorticoids (10(-7) M) and gonadal steroids (10(-7) M) induced short- and long-term treatment effects. Thereby, our data show that steroid hormones differentially regulate catalase activity in models of the central nervous system (CNS) in a time- and steroid-dependent manner.
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Affiliation(s)
- A J Schmidt
- Department of Psychiatry and Psychotherapy, Neurobiological Laboratory, Philipps-University of Marburg, Rudolf-Bultmann-Str. 8; 35033 Marburg, Germany
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Lin H, Decuypere E, Buyse J. Oxidative stress induced by corticosterone administration in broiler chickens (Gallus gallus domesticus). Comp Biochem Physiol B Biochem Mol Biol 2004; 139:745-51. [PMID: 15581807 DOI: 10.1016/j.cbpc.2004.09.014] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2004] [Revised: 09/13/2004] [Accepted: 09/14/2004] [Indexed: 10/26/2022]
Abstract
Two trials were conducted to evaluate the effects of short-term administration of corticosterone (CORT) on the induction of oxidative injury in broiler chickens (Gallus gallus domesticus). Twelve broiler chickens of 30 and of 40 days of age were respectively employed in Trial 1 and 2. Half of the chickens were administered subcutaneously with CORT (4 mg/kg body weight [BW] in corn oil), while another half served as controls (corn oil) in each trail. In Trial 1, a blood sample was obtained from each chicken immediately before administration and at 1 and 3 h after injection. In Trial 2, the liver and heart were obtained after 3 h of CORT exposure. Short-term administration of CORT resulted in enhanced proteolysis and gluconeogenesis. There were no obvious changes in lipid peroxidation status of the heart and liver, whereas a decrease in lipid peroxidation in the plasma was observed after acute CORT exposure. The significantly increased plasma nonenzymatic antioxidants (uric acid [UA] and total antioxidant capacity) in concert with the enhanced enzymatic antioxidant activity (SOD in heart) during short-term CORT administration indicate preventive changes to counteract the oxidative injury, and these may be tissue specific.
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Affiliation(s)
- H Lin
- Lab of Physiology and Immunology of Domestic Animals, Department of Animal Production, Catholic University Leuven, Kasteelpark Arenberg 30, 3001 Leuven, Belgium
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Lin H, Decuypere E, Buyse J. Oxidative stress induced by corticosterone administration in broiler chickens (Gallus gallus domesticus). Comp Biochem Physiol B Biochem Mol Biol 2004; 139:737-44. [PMID: 15581806 DOI: 10.1016/j.cbpc.2004.09.013] [Citation(s) in RCA: 224] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2004] [Revised: 09/13/2004] [Accepted: 09/14/2004] [Indexed: 10/26/2022]
Abstract
The effects of long-term dietary administration of corticosterone (CORT) on the induction of oxidative injury in broiler chickens (Gallus gallus domesticus) were evaluated. The experimental broiler chickens were fed with a diet supplemented with 30 mg CORT/kg diet for 2 weeks from 14 days of age onwards, while control chickens continued to consume the control diet. The growth performance parameters were recorded weekly, and a blood sample was obtained from eight birds of both groups before CORT administration and at 3, 7 and 14 days after treatment. The results showed that chronic CORT administration resulted in enhanced proteolysis and gluconeogenesis. Furthermore, CORT administration may initially induce the formation of reactive oxygen species (ROS) as indirectly reflected by an increase in lipid peroxidation. However, the significantly increased plasma uric acid (UA) and ceruloplasmin (CP) levels after 3 days of treatment indicates an enhancement of the nonenzymatic antioxidant capacity during stress, and in this way, the development of a more severe oxidative injury is alleviated. Broiler chickens seem to adapt to high circulating CORT levels in terms of their redox homeostasis after 3 days of treatment under the present experimental conditions.
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Affiliation(s)
- H Lin
- Lab of Physiology and Immunology of Domestic Animals, Department of Animal Production, Catholic University Leuven, Kasteelpark Arenberg 30, 3001 Leuven, Belgium
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Burak Cimen MY, Cimen OB, Eskandari G, Sahin G, Erdoğan C, Atik U. In vivo effects of meloxicam, celecoxib, and ibuprofen on free radical metabolism in human erythrocytes. Drug Chem Toxicol 2003; 26:169-76. [PMID: 12953657 DOI: 10.1081/dct-120022645] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
One of the major groups of chemical mediators involved in the inflammatory response is the prostaglandins, which are synthesized from arachidonic acid by the enzyme cyclooxygenase. The aim of this study is to compare the in vivo effects of celecoxib, meloxicam, and ibuprofen on the activities of catalase (CAT), glutathione peroxidase (GSHPx), superoxide dismutase (SOD) as well as malondialdehyde (MDA), and antioxidant potential levels (AOP) in human erythrocytes. Patients diagnosed as osteoarthritis were included in the study. Patients were treated with Celecoxib (200 mg/d) (n = 12), Meloxicam (15 mg/d) (n = 12), and Ibuprufen (1200 mg/d) (n = 9) for 21 days. SOD, CAT, GSHPx activities, MDA, and AOP levels were investigated in human erythrocyte haemolysates. SOD activity and AOP levels were significantly decreased in all NSAID groups when we compared the values before and after 21 days of celecoxib, meloxicam, ibuprofen treatment. There were no significant difference in CAT, GSHPx activities, and MDA levels before and after treatment in each group. Decreased SOD activities are thought to be related with the increased superoxide anion. Decreased AOP levels may indicate impairment in the total antioxidant defence system. These NSAIDs have similar effects on free radical metabolism on human erythrocytes; despite some difference in action mechanisms.
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Affiliation(s)
- M Y Burak Cimen
- Department of Biochemistry, Medical Faculty, Mersin University, 33079 Mersin, Turkey.
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Garcia C, de Oliveira MCX, Verlengia R, Curi R, Pithon-Curi TC. Effect of dexamethasone on neutrophil metabolism. Cell Biochem Funct 2003; 21:105-11. [PMID: 12736898 DOI: 10.1002/cbf.1002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The effect of dexamethasone on glucose and glutamine metabolism was investigated. The consumption and oxidation of glucose and glutamine, and the production of glutamate and lactate were determined in neutrophils cultured for 3 h in the presence of dexamethasone. The activities and expression of glucose-6-phosphate dehydrogenase (G6PDH) and phosphate-dependent glutaminase were also determined under the same conditions. Addition of dexamethasone to the culture medium caused a significant increase of glucose consumption at 0.5 microm (123.9%) and 1.0 microm (78.3%) concentrations. In spite of this, however, glucose oxidation remained unchanged. The glucocorticoid did not change glutamine consumption but caused a significant increase of glutamate production and did not alter glutamine oxidation. Dexamethasone-treated neutrophils had a significant decrease of G6PDH activity and expression in particular at 1.0 microm concentration. Phosphate- dependent glutaminase activity was also decreased (about 34%) by dexamethasone treatment. A similar effect was observed on glutaminase expression as indicated by RT-PCR analysis. Thus, the effect of dexamethasone on neutrophil metabolism was particularly noticeable with respect to G6PDH and glutaminase activities where a decrease in the respective mRNA levels was demonstrated.
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Affiliation(s)
- Carolina Garcia
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Brazil
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Peres CM, Homem de Bittencourt PI, Mendonça JR, Curi R. Evidence that macrophages transfer arachidonic acid and cholesterol to tissuesin vivo. Cell Biochem Funct 2003; 21:317-23. [PMID: 14624469 DOI: 10.1002/cbf.1029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Our previous studies have shown that [(14)C]-labelled cholesterol (CHOL) and arachidonic acid (AA) are transferred from macrophages (Mphi) to lymphocytes (LY) when these cells are co-cultured. In this study, we investigated whether these lipids can be transferred from control and thioglycollate-elicited Mphi (THIO-elicited Mphi) to various tissues and organs in vivo. For this purpose, control and THIO-elicited Mphi were pre-treated with [(14)C]-AA and [(3)H]-CHOL and then injected into the jugular vein of adult rats. More than 75% of the radioactivity injected was found in the liver of rats treated with [(14)C]-AA labelled-Mphi either control and THIO-stimulated. The radioactivity of [(3)H]-CHOL labelled Mphi was transferred mainly to the liver (51% in the control Mphi and 23% in the thioglycollate Mphi7) but it was also found in the kidney, lung and spleen. These results support the proposition that the transfer of lipids between cells also occurs in vivo. The full significance of this phenomenon however remains to be elucidated.
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Affiliation(s)
- C M Peres
- Department of Physiology and Biophysics, Institute of Biomedical Sciences-I, University of São Paulo, Av. Prof. Lineu Prestes 1524, Butantã 05508-900, São Paulo, Brazil.
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Whitworth JA, Schyvens CG, Zhang Y, Andrews MC, Mangos GJ, Kelly JJ. The nitric oxide system in glucocorticoid-induced hypertension. J Hypertens 2002; 20:1035-43. [PMID: 12023661 DOI: 10.1097/00004872-200206000-00003] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The blood pressure-raising effects of adrenocortical steroids with predominantly glucocorticoid activity, both naturally occurring and synthetic, are well known. Recent evidence suggests that the nitric oxide system plays a key role in the hypertension produced by glucocorticoids. Glucocorticoid actions at various sites in the nitric oxide synthase (NOS) pathway may result in elevated blood pressure. These include: alterations in l-arginine availability or transport; NOS2 and NOS3 downregulation; reduced cofactor bioavailability; NOS uncoupling; a concomitant elevation in reactive oxygen species and removal of nitric oxide (NO) from the vascular environment; alterations in whole body antioxidant status; and erythropoietin induced resistance to NO.
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Affiliation(s)
- Judith A Whitworth
- The John Curtin School of Medical Research, The Australian National University, Canberra, ACT 0200, Australia.
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Zhao X, Smartt CT, Li J, Christensen BM. Aedes aegypti peroxidase gene characterization and developmental expression. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2001; 31:481-490. [PMID: 11222958 DOI: 10.1016/s0965-1748(00)00155-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The functions of insect peroxidases include detoxification, stabilization of extracellular matrices, and possible involvement in insect immunity. The current study describes the isolation of a peroxidase gene, AePox, and its cDNA from the mosquito, Aedes aegypti. AePox codes for a protein that is homologous to various heme-peroxidases from vertebrates and invertebrates, with highest identity to Drosophila melanogaster peroxidase (62%). Sequence comparison identified several functionally and structurally conserved domains in the mosquito peroxidase, including a heme environment, a calcium binding site, and five possible disulfide bridges. These results imply that AePOX may likely have a similar structure and catalytic mechanism as those described for the mammalian myeloperoxidase superfamily. Expression studies demonstrate that AePox is transcribed in mosquito larvae and pupae, but not in adults, in ovaries, or in early embryos. However, AePOX protein is present in all mosquito stages and possibly has a maturation process that is similar to that of human myeloperoxidase. Unlike most human peroxidases, the AePox gene contains a TATA box and an ecdysone response element (EcRE).
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Affiliation(s)
- X Zhao
- Department of Animal Health and Biomedical Sciences, 1656 Linden Dr., University of Wisconsin, Madison, WI 53706, USA
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