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Xiang Y, Wang L, Wei Y, Zhang H, Emu Q. Excessive manganese alters serum biochemical indices, induces histopathological alterations, and activates apoptosis in liver and cerebrum of Jianzhou Da'er goat (Capra hircus). Comp Biochem Physiol C Toxicol Pharmacol 2022; 252:109241. [PMID: 34752896 DOI: 10.1016/j.cbpc.2021.109241] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 10/27/2021] [Accepted: 10/31/2021] [Indexed: 02/05/2023]
Abstract
The present study aimed to explore the toxic effects of excessive dietary Mn in livers and cerebrums of Jianzhou Da'er goat (Capra hircus). Three-month old goats were assigned into three groups: control group, fed on basal diet; Mn I group, fed on the basal diet mixed with MnCl2 (2.5 g/kg); Mn II group, fed on the basal diet mixed with MnCl2 (5 g/kg). Compared with the control group, the activities of serum alkaline phosphatase (ALP), alanine aminotransferase (ALT), aspartate aminotransferase (AST) and the concentrations of interferon-γ (IFN-γ) in Mn I and Mn II groups were significantly increased, but the concentrations of IgG in Mn I and Mn II groups were significantly decreased (p < 0.05). The activities of superoxide dismutase (T-SOD), glutathione peroxidase (GSH-Px), and the concentrations of glutathione (GSH) in Mn I and Mn II groups were significantly decreased, whereas the concentrations of malondialdehyde (MDA) in Mn I and Mn II groups were significantly increased in livers and cerebrums (p < 0.05). Moreover, the hepatocytes necrosed, inflammatory cells infiltrated, chromatin concentrated, mitochondrial cristae reduced in Mn I and Mn II groups. The nerve cells necrosed, blood vessels congested, inflammatory cells infiltrated, mitochondrial electron density and mitochondrial cristae decreased, and vacuolization increased in Mn I and Mn II groups. Furthermore, the mRNA expressions of tumor necrosis factor alpha (TNF-α), tumor necrosis factor receptor type 1 (TNFR1), fas-associated protein via a death domain (FADD), Bcl2-associated X (Bax), cysteinyl aspartate specific proteinase 3, 8, 9 (Caspase-3, 8, 9) in Mn I and Mn II groups were significantly increased (p < 0.05), but the mRNA expressions of B-cell lymphoma-2 (Bcl-2) in Mn I and Mn II groups were significantly decreased (p < 0.05) in livers. The mRNA expressions of Bcl-2, Bax, Caspase-3, 9, 7, 12 in Mn I and Mn II groups were significantly increased (p < 0.05), however, the ratio of Bcl-2/Bax in Mn I and Mn II groups was significantly decreased (p < 0.05) in cerebrums. In summary, our results provided new insights for better understanding the mechanisms of Mn toxicity in Capra hircus.
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Affiliation(s)
- Yi Xiang
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu 610041, China
| | - Li Wang
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu 610041, China.
| | - Yong Wei
- Animal Science Academy of Sichuan Province, Chengdu 610066, China.
| | - Hua Zhang
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu 610041, China
| | - Quzhe Emu
- Animal Science Academy of Sichuan Province, Chengdu 610066, China
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Rosenheck M, Sheeler C, Saré RM, Gurney ME, Smith CB. Effects of chronic inhibition of phosphodiesterase-4D on behavior and regional rates of cerebral protein synthesis in a mouse model of fragile X syndrome. Neurobiol Dis 2021; 159:105485. [PMID: 34411704 DOI: 10.1016/j.nbd.2021.105485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 07/22/2021] [Accepted: 08/12/2021] [Indexed: 10/20/2022] Open
Abstract
Fragile X Syndrome (FXS) is caused by silencing the FMR1 gene which results in intellectual disability, hyperactivity, sensory hypersensitivity, autistic-like behavior, and susceptibility to seizures. This X-linked disorder is also associated with reduced cAMP levels in humans as well as animal models. We assessed the therapeutic and neurochemical effects of chronic administration of the phosphodiesterase-4D negative allosteric modulator, BPN14770, in a mouse model of FXS (Fmr1 KO). Groups of male Fmr1 KO mice and control littermates were treated with dietary BPN14770 commencing postnatal day 21. A dose-response effect was investigated. At 90 days of age, mice underwent behavior tests including open field, novel object recognition, three chambered sociability and social novelty tests, passive avoidance, and sleep duration analysis. These tests were followed by in vivo measurement of regional rates of cerebral protein synthesis (rCPS) with the autoradiographic L-[1-14C]leucine method. BPN14770 treatment had positive effects on the behavioral phenotype in Fmr1 KO mice. Some effects such as increased sleep duration and increased social behavior occurred in both genotypes. In the open field, the hyperactivity response in Fmr1 KO mice was ameliorated by BPN14770 treatment at low and intermediate doses. BPN14770 treatment tended to increase rCPS in a dose-dependent manner in WT mice, whereas in Fmr1 KO mice effects on rCPS were less apparent. Results indicate BPN14770 treatment improves some behavior in Fmr1 KO mice. Results also suggest a genotype difference in the regulation of translation via a cAMP-dependent pathway.
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Affiliation(s)
- Michael Rosenheck
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892, USA
| | - Carrie Sheeler
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892, USA
| | - Rachel Michelle Saré
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892, USA
| | - Mark E Gurney
- Tetra Discovery Partners, Inc, Grand Rapids, MI, USA
| | - Carolyn Beebe Smith
- Section on Neuroadaptation and Protein Metabolism, National Institute of Mental Health, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892, USA.
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Shemesh D, Rozenberg K, Rosenzweig T, Abookasis D. Single probe diffuse reflectance spectroscopy to assess the effect of sarcopoterium spinosum treatment on the cerebral tissue properties of ApoE knockout mouse. J Biophotonics 2021; 14:e202000307. [PMID: 33084182 DOI: 10.1002/jbio.202000307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/11/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
In this work, diffuse near-infrared light reflectance spectroscopy based on a single optical probe, contains central single collection fiber surrounded by a circular array of illumination fibers, was used to quantify cerebral tissue properties in ApoE knockout mice following Sarcopoterium spinosum treatment. Sarcopoterium spinosum, also known as Thorny burnet, is a Mediterranean plant widely used as a traditional therapy for the treatment of a variety of pathologies, primarily type 2 diabetes mellitus (T2D). While it's efficacy in the treatment of T2D, and of other components of metabolic syndrome, have already been validated by us, the aim of this study was to investigate the effects of Sarcopoterium spinosum extract (SSE) on dyslipidemia and vascular functions. We utilized ApoE deficient mice (ApoE-/- , Atherosclerosis-prone apolipoprotein E-deficient), who have a severe impairment in plasma lipoprotein clearance and thus develop alterations in blood lipid profile and are highly susceptible to atherogenic plaque formation. A total of 34 male mice were divided into five groups representing various genetic, dietary, and treatment configurations. Optical measurements were used to assess changes in diffused reflectance spectra, optical properties (absorption and scattering), and cerebral tissue chromophore contents. Specifically, significant improvement in cerebral hemoglobin level was observed in ApoE KO mice, fed an artherogenic diet (ATD), upon SSE treatment. Biochemical and histological analyses of ApoE-/- ATD mice showed elevated body weight and a high level of blood triglycerides, free fatty acids and cholesterol. In contrast, in SSE treated mice improvement was observed, suggesting beneficial effects of SSE. In ApoE-/- ATD mice group a higher levels of deoxyhemoglobin was monitored indicating that the rate of oxygen release to the tissue is low. This was supported by decrease in oxygen saturation. It was also shown a reduction in water content in the brain of ApoE KO. Mice fed with the atherogenic diet demonstrated increased water content as compared to STD-fed ApoE KO mice, while SSE administration reversed the effect of the diet. To our knowledge, no such study has been reported before.
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Affiliation(s)
- David Shemesh
- Department of Electrical and Electronics Engineering, Ariel University, Ariel, Israel
| | - Konstantin Rozenberg
- Departments of Molecular Biology and Nutritional Studies, Ariel University, Ariel, Israel
| | - Tovit Rosenzweig
- Departments of Molecular Biology and Nutritional Studies, Ariel University, Ariel, Israel
| | - David Abookasis
- Department of Electrical and Electronics Engineering, Ariel University, Ariel, Israel
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Conradi N, Rosenberg F, Biermann L, Haag A, Hermsen A, Gorny I, von Podewils V, Gurschi M, Keil F, Hattingen E, Menzler K, Bauer S, Schubert-Bast S, Knake S, Rosenow F, Strzelczyk A. Advantages of methohexital over amobarbital in determining hemispheric language and memory lateralization in the Wada test - A retrospective study. Epilepsy Behav 2020; 113:107551. [PMID: 33246234 DOI: 10.1016/j.yebeh.2020.107551] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 10/01/2020] [Accepted: 10/02/2020] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Due to supply shortage, amobarbital, the traditional anesthetic agent in Wada testing, was replaced by methohexital in many epilepsy centers. This study aimed to compare the two barbiturates to identify possible advantages or disadvantages of methohexital as compared to amobarbital with regard to the adequacy of language and memory testing during the Wada test. METHODS Data from 75 patients with temporal lobe epilepsy who underwent bilateral Wada tests using either amobarbital (n = 53) or methohexital (n = 22) as part of presurgical work-up were analyzed retrospectively. The two subgroups were compared regarding hemispheric language and memory lateralization results and Wada testing characteristics, and the adequacy of language and memory testing was assessed. RESULTS We observed shorter durations of motor-, speech-, and EEG recovery after each injection in patients receiving methohexital compared to amobarbital. In addition, significantly more items could be presented during effective hemispheric inactivation in the methohexital group. Moreover, significant correlations of Wada memory scores with standard neuropsychological memory test scores could be found in the methohexital group. SIGNIFICANCE Our findings confirm that methohexital is not only equally suitable for Wada testing but has several advantages over amobarbital. Wada testing can be performed more efficiently and under more constant hemispheric inactivation using methohexital. Furthermore, the adequacy of language and memory testing during the Wada test might be affected by the anesthetic agent used.
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Affiliation(s)
- Nadine Conradi
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany; LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany.
| | - Friederike Rosenberg
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany
| | - Louise Biermann
- Epilepsy Center Hessen, Department of Neurology, Philipps-University Marburg, Marburg, Germany
| | - Anja Haag
- Epilepsy Center Hessen, Department of Neurology, Philipps-University Marburg, Marburg, Germany
| | - Anke Hermsen
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany; LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
| | - Iris Gorny
- Epilepsy Center Hessen, Department of Neurology, Philipps-University Marburg, Marburg, Germany
| | - Viola von Podewils
- Department of Neurology, University Medicine Greifswald, Greifswald, Germany
| | - Marianna Gurschi
- Department of Neuroradiology, Philipps-University Marburg, Marburg, Germany
| | - Fee Keil
- Institute of Neuroradiology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany
| | - Elke Hattingen
- Institute of Neuroradiology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany
| | - Katja Menzler
- Epilepsy Center Hessen, Department of Neurology, Philipps-University Marburg, Marburg, Germany
| | - Sebastian Bauer
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany; LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
| | - Susanne Schubert-Bast
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany; LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany; Department of Neuropediatrics, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany
| | - Susanne Knake
- LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany; Epilepsy Center Hessen, Department of Neurology, Philipps-University Marburg, Marburg, Germany
| | - Felix Rosenow
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany; LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
| | - Adam Strzelczyk
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany; LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
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Norman JE, Aung HH, Otoki Y, Zhang Z, Taha AY, Rutledge JC. A single meal has the potential to alter brain oxylipin content. Prostaglandins Leukot Essent Fatty Acids 2020; 154:102062. [PMID: 32062416 PMCID: PMC7067679 DOI: 10.1016/j.plefa.2020.102062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/06/2020] [Accepted: 01/28/2020] [Indexed: 12/13/2022]
Abstract
Our objective was to determine whether consumption of a single meal has the potential to alter brain oxylipin content. We examined the cerebrum of mice fed a single high-fat/high-sucrose Western meal or a low-fat/low-sucrose control meal, as well as fasted mice. We found no changes in fatty acid composition of cerebrum across the groups. The cerebral oxylipin profile of mice fed a Western meal is distinct from the profile of mice fed a low-fat/low-sucrose meal. Cerebral gene expression of cyclooxygenase 1, cyclooxygenase 2, and epoxide hydrolase 1 were elevated in Western meal-fed mice compared to low-fat/low-sucrose meal-fed mice. Mice that consumed either meal had lower gene expression of cytochrome P450, family 2, subfamily j, polypeptide 12 than fasted mice. Our data in this hypothesis-generating study indicates that the composition of a single meal has the potential to alter brain oxylipins and the gene expression of the enzymes responsible for their production.
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Affiliation(s)
- J E Norman
- University of California, Davis, School of Medicine, Department of Internal Medicine, Division of Cardiovascular Medicine, United States.
| | - H H Aung
- University of California, Davis, School of Medicine, Department of Internal Medicine, Division of Cardiovascular Medicine, United States
| | - Y Otoki
- University of California, Davis, Department of Food Science and Technology, United States; Tohoku University, Graduate School of Agricultural Science, Food and Biodynamic Chemistry Laboratory, Japan
| | - Z Zhang
- University of California, Davis, Department of Food Science and Technology, United States
| | - A Y Taha
- University of California, Davis, Department of Food Science and Technology, United States
| | - J C Rutledge
- University of California, Davis, School of Medicine, Department of Internal Medicine, Division of Cardiovascular Medicine, United States
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Takahashi T, Kim MS, Iwai-Shimada M, Hoshi T, Fujimura M, Toyama T, Fujiwara Y, Naganuma A, Hwang GW. Induction of chemokine CCL3 by NF-κB reduces methylmercury toxicity in C17.2 mouse neural stem cells. Environ Toxicol Pharmacol 2019; 71:103216. [PMID: 31260942 DOI: 10.1016/j.etap.2019.103216] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 06/07/2019] [Accepted: 06/24/2019] [Indexed: 06/09/2023]
Abstract
Methylmercury is an environmental pollutant that shows selective toxicity to the central nervous system. We previously reported that brain-specific expression of chemokine CCL3 increases in mice administered methylmercury. However, the relationship between CCL3 and methylmercury toxicity has not been elucidated. Here, we confirmed that induction of CCL3 expression occurs before pathological change by methylmercury treatment was observed in the mouse brain. This induction was also observed in C17.2 mouse neural stem cells before methylmercury-induced cytotoxicity. In addition, cells in which CCL3 was knocked-down showed higher methylmercury sensitivity than did control cells. Moreover, activation of transcription factor NF-κB was observed following methylmercury treatment, and methylmercury-mediated induction of CCL3 expression was partially suppressed by knockdown of p65, an NF-κB subunit. Our results suggest that NF-κB plays a role in the induction of methylmercury-mediated CCL3 expression and that this action may be a cellular response to methylmercury toxicity.
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Affiliation(s)
- Tsutomu Takahashi
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba-ku, Sendai 980-8578, Japan; Department of Environmental Health, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Min-Seok Kim
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba-ku, Sendai 980-8578, Japan; Department of Inhalation Toxicology Research, Korea Institute of Toxicology, Jeonbuk 56212, Republic of Korea
| | - Miyuki Iwai-Shimada
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba-ku, Sendai 980-8578, Japan; Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Onogawa16-2, Tsukuba, Ibaraki 305-8506, Japan
| | - Takayuki Hoshi
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Masatake Fujimura
- Department of Basic Medical Science, National Institute for Minamata Disease, Kumamoto, 867-0008, Japan
| | - Takashi Toyama
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Yasuyuki Fujiwara
- Department of Environmental Health, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Akira Naganuma
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Gi-Wook Hwang
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba-ku, Sendai 980-8578, Japan.
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Piao F, Zhang Y, Yang L, Zhang C, Shao J, Liu X, Li Y, Li S. Taurine Attenuates As 2O 3-Induced Autophagy in Cerebrum of Mouse Through Nrf2 Pathway. Adv Exp Med Biol 2018; 975 Pt 2:863-870. [PMID: 28849506 DOI: 10.1007/978-94-024-1079-2_68] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We previously reported that the impairment of cerebrum may relate with neurotoxicity induced by arsenic (As) exposure. In the present study, we investigated whether autophagy of the cerebrum neurons were responsible for As-induced neurotoxicity and the protective role of taurine (Tau). Forty mice were randomly divided into control group, Tau control group, As exposure group and Tau protection group. The results showed that LC3 II expression was elevated and P62 expression was lower after As exposure, whereas the effects were obviously attenuated by Tau treatment. More important, As induced increase of MDA level and decrease of Nrf2 expression were significantly inversed in protective group. In sum, autophagy inhibition might play a strong role in the neuroprotection of Tau in As-induced toxicity via Nrf2 pathway.
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Affiliation(s)
- Fengyuan Piao
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Yan Zhang
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
- Xunyi Center for Disease Control and Prevention, Xunyi, China
| | - Lijun Yang
- Dalian Center for Disease Control and Prevention, Dalian, China
| | - Cong Zhang
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Jing Shao
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Xiaohui Liu
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Yachen Li
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China
| | - Shuangyue Li
- Department of Occupational and Environmental Health, Dalian Medical University, Dalian, China.
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Lin J, Zhao HS, Qin L, Li XN, Zhang C, Xia J, Li JL. Atrazine Triggers Mitochondrial Dysfunction and Oxidative Stress in Quail ( Coturnix C. coturnix) Cerebrum via Activating Xenobiotic-Sensing Nuclear Receptors and Modulating Cytochrome P450 Systems. J Agric Food Chem 2018; 66:6402-6413. [PMID: 29865786 DOI: 10.1021/acs.jafc.8b01413] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The residues from the widely used broad-spectrum environmental herbicide, atrazine (ATR), result in the exposure of nontarget organisms and persist as a global major public health hazard. ATR is neurotoxic and may cause adverse health effects in mammals, birds, and fishes. Nevertheless, the molecular mechanism of ATR induced neurotoxicity remains unclear. To assess the molecular mechanisms of ATR-induced cerebral toxicity through potential oxidative damage, quail were treated with ATR by oral gavage administration at doses of 0, 50, 250, and 500 mg/kg body weight daily for 45 days. Markedly, increases in the amount of swelling of neuronal cells, the percentage of mean damaged mitochondria, mitochondrial malformation, and mitochondrial vacuolar degeneration as well as decreases in the mitochondrial cristae and mitochondrial volume density were observed by light and electron microscopy in the cerebrum of quail. ATR induced toxicities in the expression of mitochondrial function-related genes and promoted oxidative damage, as indicated by effects on oxidative stress indices. These results indicated that ATR exposure can cause neurological disorders and cerebral injury. ATR may initiate apoptosis by activating Bcl-2, Bax, and Caspase3 protein expression but failed to induce autophagy (LC3B has not cleaved to LC3BI/II). Furthermore, ATR induced CYP-related enzymes metabolism disorders by activating the nuclear xenobiotic receptors response (NXRs including AHR, CAR, and PXR) and increased expression of several CYP isoforms (including CYP1B1 and CYP2C18) and thereby producing mitochondrial dysfunction. In this study, we observed ATR exposure resulted in oxidative stress and mitochondrial dysfunction by activating the NXR response and interfering the CYP450s homeostasis in quail cerebrum that supported the molecular mechanism of ATR induced cerebrum toxicity. In conclusion, these results provided new evidence on molecular mechanism of ATR induced neurotoxicity.
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Affiliation(s)
| | | | - Lei Qin
- Laboratory Animal Centre , Qiqihar Medical University , Qiqihar 161006 , P.R. China
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9
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Suwannasual U, Lucero J, McDonald JD, Lund AK. Exposure to traffic-generated air pollutants mediates alterations in brain microvascular integrity in wildtype mice on a high-fat diet. Environ Res 2018; 160:449-461. [PMID: 29073573 PMCID: PMC5705467 DOI: 10.1016/j.envres.2017.10.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 10/16/2017] [Accepted: 10/17/2017] [Indexed: 05/03/2023]
Abstract
Air pollution-exposure is associated with detrimental outcomes in the central nervous system (CNS) such as cerebrovascular disorders, including stroke, and neurodegenerative diseases. While the mechanisms of these CNS-related outcomes involved have not been fully elucidated, exposure to traffic-generated air pollutants has been associated with altered blood brain barrier (BBB) integrity and permeability. The current study investigated whether inhalation exposure to mixed vehicle emissions (MVE) alters cerebral microvascular integrity in healthy 3 mo old C57BL/6 mice, as well as whether exposure-mediated effects were exacerbated by a high-fat (HF) vs. low-fat (LF) diet. Mice on each diet were randomly assigned to be exposed to either filtered air (FA) or MVE [100PM/m3 vehicle emissions mixture: 30µg PM/m3 gasoline engine + 70µg PM/m3 diesel engine emissions; median size ~ 60nm; particle mass size distribution median of ~ 1µm (range: < 0.5-20µm)] for 6h/d, 7d/wk, for 30d. Using sodium fluorescein as a tracer, we observed a significant increase in BBB permeability in both HF + MVE exposed and HF + FA animals, compared to LF + FA controls. Exposure to HF + MVE also led to a significant increase plasma ox-LDL and ox-LDL scavenger receptors (LOX-1 and CD-36) expression in the cerebral vasculature. Histological analysis revealed decreased expression of TJ protein, claudin-5, associated with increased matrix metalloproteinase (MMP)-9 activity and oxidative stress in the cerebral vasculature of HF + MVE mice, compared to LF + MVE. Such findings indicate that inhalation exposure to traffic-generated pollutants, coupled with a HF diet, results in altered BBB integrity and increased ox-LDL signaling in the cerebral vasculature in a wildtype animal model.
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Affiliation(s)
- Usa Suwannasual
- Advanced Environmental Research Institute, Department of Biological Sciences, University of North Texas, Denton, TX 76201, USA
| | - JoAnn Lucero
- Advanced Environmental Research Institute, Department of Biological Sciences, University of North Texas, Denton, TX 76201, USA
| | - Jacob D McDonald
- Lovelace Biomedical and Environmental Research Institute, Albuquerque, NM 87108, USA
| | - Amie K Lund
- Advanced Environmental Research Institute, Department of Biological Sciences, University of North Texas, Denton, TX 76201, USA.
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Pedroso TF, Oliveira CS, Fonseca MM, Oliveira VA, Pereira ME. Effects of Zinc and N-Acetylcysteine in Damage Caused by Lead Exposure in Young Rats. Biol Trace Elem Res 2017; 180:275-284. [PMID: 28389902 DOI: 10.1007/s12011-017-1009-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 03/31/2017] [Indexed: 12/22/2022]
Abstract
This study investigated the toxicity of rats exposed to lead acetate (AcPb) during the second phase of brain development (8-12 days postnatal) in hematological and cerebral parameters. Moreover, the preventive effect of zinc chloride (ZnCl2) and N-acetylcysteine (NAC) was investigated. Pups were injected subcutaneously with saline (0.9% NaCl solution), ZnCl2 (27 mg/kg/day), NAC (5 mg/kg/day) or ZnCl2 plus NAC for 5 days (3rd-7th postnatal days), and with saline (0.9% NaCl solution) or AcPb (7 mg/kg/day) in the five subsequent days (8th-12th postnatal days). Animals were sacrificed 21 days after the last AcPb exposure. Pups exposed to AcPb presented inhibition of blood porphobilinogen-synthase (PBG-synthase) activity without changes in hemoglobin content. ZnCl2 pre-exposure partially prevented PBG-synthase inhibition. Regarding neurotoxicity biomarkers, animals exposed to AcPb presented a decrease in cerebrum acetylcholinesterase (AChE) activity and an increase in Pb accumulation in blood and cerebrum. These changes were prevented by pre-treatment with ZnCl2, NAC, and ZnCl2 plus NAC. AcPb exposure caused no alteration in behavioral tasks. In short, results show that AcPb inhibited the activity of two important enzymatic biomarkers up to 21 days after the end of the exposure. Moreover, ZnCl2 and NAC prevented the alterations induced by AcPb.
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Affiliation(s)
- Taíse F Pedroso
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Cláudia S Oliveira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Mariana M Fonseca
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Vitor A Oliveira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil
| | - Maria Ester Pereira
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.
- Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Santa Maria, RS, 97105-900, Brazil.
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11
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Zhang K, Zhu Y, Wang X, Zhao X, Li S, Teng X. Excess Manganese-Induced Apoptosis in Chicken Cerebrums and Embryonic Neurocytes. Biol Trace Elem Res 2017; 180:297-305. [PMID: 28361387 DOI: 10.1007/s12011-017-0992-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 03/08/2017] [Indexed: 11/25/2022]
Abstract
There were many studies about the effect of excess manganese (Mn) on nervous system apoptosis; however, Mn-induced apoptosis in chicken cerebrums and embryonic neurocytes was unclear. The purpose of this study was to investigate the effect of excess Mn on chicken cerebrum and embryonic neurocyte apoptosis. Seven-day-old Hyline male chickens were fed either a commercial diet or three levels of manganese chloride (MnCl2)-added commercial diets containing 600-, 900-, and 1800-mg/kg-Mn diet, respectively. On the 30th, 60th, and 90th days, cerebrums were collected. Fertilized Hyline chicken eggs were hatched for 6-8 days and were selected. Embryonic neurocytes with 0, 0.5, 1, 1.5, 2, 2.5, and 3 mM Mn were collected and were cultured for 12, 24, 36, and 48 h, respectively. The following research contents were performed: superoxide dismutase (SOD) and total antioxidant capacity (T-AOC) activities; tumor protein p53 (p53), B cell lymphoma-2 (Bcl-2), B cell lymphoma extra large (Bcl-x), Bcl-2-associated X protein (Bax), Bcl-2 homologous antagonist/killer (Bak), fas, and caspase-3 messenger RNA (mRNA) expression; and morphologic observation. The results indicated that excess Mn inhibited SOD and T-AOC activities; induced p53, Bax, Bak, fas, and caspase-3 mRNA expression; and inhibited Bcl-2 and Bcl-x mRNA expression in chicken cerebrums and embryonic neurocytes. There were dose-dependent manners on all the above factors at all the time points and time-dependent manners on SOD activity of 1800-mg/kg-Mn group, T-AOC activity, and apoptosis-related gene mRNA expression in all the treatment groups in chicken cerebrums. Excess Mn induced chicken cerebrum and embryonic neurocyte apoptosis.
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Affiliation(s)
- Kun Zhang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Yihao Zhu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Xiaoyu Wang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Xin Zhao
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Shu Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Xiaohua Teng
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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12
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Ben Saad H, Kharrat N, Driss D, Gargouri M, Marrakchi R, Jammoussi K, Magné C, Boudawara T, Ellouz Chaabouni S, Zeghal KM, Hakim A, Ben Amara I. Effects of vanillin on potassium bromate-induced neurotoxicity in adult mice: impact on behavior, oxidative stress, genes expression, inflammation and fatty acid composition. Arch Physiol Biochem 2017; 123:165-174. [PMID: 28276710 DOI: 10.1080/13813455.2017.1283527] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
CONTEXT Vanillin is known to possess important antioxidant activity. OBJECTIVE The current study was conducted to establish the therapeutic efficiency of vanillin against potassium bromate (KBrO3)-induced depression-like behavior and oxidative stress in mice. MATERIAL AND METHODS Mice were exposed during 15 days either to potassium bromate (KBrO3), KBrO3+ vanillin or to only vanillin. RESULTS Our results revealed a significant modification in the fatty acid composition of the KBrO3-treated mice. In addition, KBrO3 induced a significant reduction in enzymatic activities and gene expressions, Na+ -K+ and Mg2+-ATPases, acetylcholinesterase and butylcholinesterase activities. The gene expression of tumor necrosis factor-α, interleukin-1β, interleukin-6 and COX2, significantly increased in the cerebrum of KBrO3-treated group. Histopathological observations were consistent with these effects. Co-treatment with vanillin significantly attenuated KBrO3-induced oxidative stress and inflammation. CONCLUSION This work suggests that vanillin mitigates KBrO3-induced depression, and that this neuroprotective effect proceeds through anti-oxidant and anti-inflammatory activities.
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Affiliation(s)
- Hajer Ben Saad
- a Faculty of Medicine , Laboratory of Pharmacology, University of Sfax , Tunisia
| | - Nadia Kharrat
- b Laboratory of Biochemistry and Enzymatic Engineering of Lipases , Sfax University , Tunisia
| | - Dorra Driss
- c Enzymes and Bioconversions Laboratory, National Engineering School, University of Sfax , Tunisia
| | - Manel Gargouri
- d EA 2219 Géoarchitecture, University of Western Brittany, UFR Sciences & Techniques , Brest , France
| | - Rim Marrakchi
- e Biochemistry Laboratory, CHU Hedi Chaker, University of Sfax , Tunisia
| | - Kamel Jammoussi
- e Biochemistry Laboratory, CHU Hedi Chaker, University of Sfax , Tunisia
| | - Christian Magné
- d EA 2219 Géoarchitecture, University of Western Brittany, UFR Sciences & Techniques , Brest , France
| | - Tahia Boudawara
- f Anatomopathology Laboratory, Habib Bourguiba Hospital, University of Sfax , Tunisia , and
| | - Samia Ellouz Chaabouni
- c Enzymes and Bioconversions Laboratory, National Engineering School, University of Sfax , Tunisia
| | - Khaled Mounir Zeghal
- a Faculty of Medicine , Laboratory of Pharmacology, University of Sfax , Tunisia
| | - Ahmed Hakim
- a Faculty of Medicine , Laboratory of Pharmacology, University of Sfax , Tunisia
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13
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Hsueh PT, Wang HH, Liu CL, Ni WF, Chen YL, Liu JK. Expression of cerebral serotonin related to anxiety-like behaviors in C57BL/6 offspring induced by repeated subcutaneous prenatal exposure to low-dose lipopolysaccharide. PLoS One 2017. [PMID: 28650979 PMCID: PMC5484498 DOI: 10.1371/journal.pone.0179970] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Prenatal exposure to lipopolysaccharide (LPS), which likely occurs due to infection or contact with environmental allergens during pregnancy, is a proposed risk factor that induces anxiety- and autism spectrum disorder-like behaviors in offspring. However, the molecular and behavioral changes in offspring after maternal immune activation have not been completely identified. We hypothesized that a subcutaneous injection of LPS in a pregnant mouse would induce changes in cerebral serotonin (5-HT) in parallel to the appearance of anxiety-like behaviors in the dam’s offspring. After LPS injections (total, 100 μg/Kg), the time spent in the central region during the open field test and the number of times that the mice moved between the light and dark boxes and between the open and closed arms on the elevated plus maze test revealed anxiety-like behaviors in offspring at 5, 6 and 9 weeks of age. The mRNA expression levels of tph2 (5-HT synthesizing enzyme) and slc6a4 (5-HT transporter) were down-regulated in both adolescent (5 weeks of age) and adult (8 weeks of age) brains. Immunohistochemistry revealed that the numbers and sizes of tph2-expressing cells were notably decreased in the raphe nuclei of the midbrain of adults. Moreover, compared with controls (phosphate-buffered saline-treated offspring), the cerebral 5-HT concentration at adolescence and adulthood in LPS-induced offspring was significantly decreased. We concluded that maternal immune activation induced by exposure to a low dose of LPS decreased cerebral 5-HT levels in parallel to the down-regulation of the tph2 and slc6a4 genes and in conjunction with anxiety-like behaviors in offspring.
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Affiliation(s)
- Pei-Tan Hsueh
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Hsuan-Han Wang
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Chiu-Lin Liu
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Wei-Fen Ni
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Ya-Lei Chen
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
- * E-mail: (LJK); (CYL)
| | - Jong-Kang Liu
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
- * E-mail: (LJK); (CYL)
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14
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Mahmoud AM, Abd El-Twab SM. Caffeic acid phenethyl ester protects the brain against hexavalent chromium toxicity by enhancing endogenous antioxidants and modulating the JAK/STAT signaling pathway. Biomed Pharmacother 2017; 91:303-311. [PMID: 28463793 DOI: 10.1016/j.biopha.2017.04.073] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 04/13/2017] [Accepted: 04/17/2017] [Indexed: 12/26/2022] Open
Abstract
Hexavalent chromium [Cr(VI)] is commonly used in industry, and is a proven toxin and carcinogen. However, the information regarding its neurotoxic mechanism is not completely understood. The present study was designed to scrutinize the possible protective effects of caffeic acid phenethyl ester (CAPE), a bioactive phenolic of propolis extract, on Cr(VI)-induced brain injury in rats, with an emphasis on the JAK/STAT signaling pathway. Rats received 2mg/kgK2CrO4 and concurrently treated with 20mg/kg CAPE for 30 days. Cr(VI)-induced rats showed a significant increase in cerebral lipid peroxidation, nitric oxide and pro-inflammatory cytokines, with concomitantly declined antioxidants and acetylcholinesterase. CAPE attenuated oxidative stress and inflammation and enhanced antioxidant defenses in the cerebrum of rats. Cr(VI) significantly up-regulated JAK2, STAT3 and SOCS3, an effect that was reversed by CAPE. In conclusion, CAPE protects the brain against Cr(VI) toxicity through abrogation of oxidative stress, inflammation and down-regulation of JAK2/STAT3 signaling in a SOCS3-independent mechanism.
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Affiliation(s)
- Ayman M Mahmoud
- Physiology Division, Zoology Department, Faculty of Science, Beni-Suef University, Egypt.
| | - Sanaa M Abd El-Twab
- Physiology Division, Zoology Department, Faculty of Science, Beni-Suef University, Egypt
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15
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Delwing-de Lima D, Fröhlich M, Dalmedico L, Aurélio JGM, Delwing-Dal Magro D, Pereira EM, Wyse ATS. Galactose alters markers of oxidative stress and acetylcholinesterase activity in the cerebrum of rats: protective role of antioxidants. Metab Brain Dis 2017; 32:359-368. [PMID: 27714582 DOI: 10.1007/s11011-016-9915-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 09/23/2016] [Indexed: 12/27/2022]
Abstract
We evaluated the in vitro effects of galactose at 0.1, 3.0, 5.0 and 10.0 mM on thiobarbituric acid-reactive substances (TBA-RS), total sulfhydryl content, protein carbonyl content, on the activities of the antioxidant enzymes catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) and on acetylcholinesterase (AChE) activity in the cerebral cortex, cerebellum and hippocampus of rats. We also investigated the influence of the antioxidants (each at 1 mM), α-tocopherol, ascorbic acid and glutathione, on the effects elicited by galactose on the parameters tested. Results showed that galactose, at a concentration of 3.0 mM, enhanced TBA-RS levels in the hippocampus, cerebral cortex and cerebellum of rats. In the cerebral cortex, galactose at concentrations of 5.0 and 10.0 mM increased TBA-RS and protein carbonyl content, and at 10.0 mM increased CAT activity and decreased AChE activity. In the cerebellum, galactose at concentrations of 5.0 and 10.0 mM increased TBA-RS, SOD and GSH-Px activities. In the hippocampus, galactose at concentrations of 5.0 and 10.0 mM increased TBA-RS and CAT activity and at 10.0 mM decreased GSH-Px. Data showed that at the pathologically high concentration (greater than 5.0 mM), galactose induces lipid peroxidation, protein carbonylation, alters antioxidant defenses in the cerebrum, and also alters cholinesterase activity. Trolox, ascorbic acid and glutathione addition prevented the majority of alterations in oxidative stress parameters and the decrease in AChE activity that were caused by galactose. Our findings lend support to a potential therapeutic strategy for this condition, which may include the use of appropriate antioxidants for ameliorating the damage caused by galactose.
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Affiliation(s)
- Daniela Delwing-de Lima
- Departamento de Medicina, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
- Programa de Pós-Graduação em Saúde e Meio Ambiente, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Monique Fröhlich
- Programa de Pós-Graduação em Saúde e Meio Ambiente, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Leticia Dalmedico
- Departamento de Farmácia, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Juliana Gruenwaldt Maia Aurélio
- Departamento de Farmácia, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Débora Delwing-Dal Magro
- Departamento de Ciências Naturais, Centro de Ciências Exatas e Naturais, Universidade Regional de Blumenau, Rua Antônio da Veiga, 140, Blumenau, SC, CEP 89012-900, Brazil
| | - Eduardo Manoel Pereira
- Departamento de Farmácia, Universidade da Região de Joinville- UNIVILLE, Rua Paulo Malschitzki, 10 - Zona Industrial Norte, Joinville, SC, CEP 89201-972, Brazil
| | - Angela T S Wyse
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo, Porto Alegre, RS, Brazil
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16
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Cacciottolo M, Wang X, Driscoll I, Woodward N, Saffari A, Reyes J, Serre ML, Vizuete W, Sioutas C, Morgan TE, Gatz M, Chui HC, Shumaker SA, Resnick SM, Espeland MA, Finch CE, Chen JC. Particulate air pollutants, APOE alleles and their contributions to cognitive impairment in older women and to amyloidogenesis in experimental models. Transl Psychiatry 2017; 7:e1022. [PMID: 28140404 PMCID: PMC5299391 DOI: 10.1038/tp.2016.280] [Citation(s) in RCA: 260] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 11/27/2016] [Indexed: 12/13/2022] Open
Abstract
Exposure to particulate matter (PM) in the ambient air and its interactions with APOE alleles may contribute to the acceleration of brain aging and the pathogenesis of Alzheimer's disease (AD). Neurodegenerative effects of particulate air pollutants were examined in a US-wide cohort of older women from the Women's Health Initiative Memory Study (WHIMS) and in experimental mouse models. Residing in places with fine PM exceeding EPA standards increased the risks for global cognitive decline and all-cause dementia respectively by 81 and 92%, with stronger adverse effects in APOE ɛ4/4 carriers. Female EFAD transgenic mice (5xFAD+/-/human APOE ɛ3 or ɛ4+/+) with 225 h exposure to urban nanosized PM (nPM) over 15 weeks showed increased cerebral β-amyloid by thioflavin S for fibrillary amyloid and by immunocytochemistry for Aβ deposits, both exacerbated by APOE ɛ4. Moreover, nPM exposure increased Aβ oligomers, caused selective atrophy of hippocampal CA1 neurites, and decreased the glutamate GluR1 subunit. Wildtype C57BL/6 female mice also showed nPM-induced CA1 atrophy and GluR1 decrease. In vitro nPM exposure of neuroblastoma cells (N2a-APP/swe) increased the pro-amyloidogenic processing of the amyloid precursor protein (APP). We suggest that airborne PM exposure promotes pathological brain aging in older women, with potentially a greater impact in ɛ4 carriers. The underlying mechanisms may involve increased cerebral Aβ production and selective changes in hippocampal CA1 neurons and glutamate receptor subunits.
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Affiliation(s)
- M Cacciottolo
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA
| | - X Wang
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - I Driscoll
- Department of Psychology, University of Wisconsin, Milwaukee, WI, USA
| | - N Woodward
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA
| | - A Saffari
- USC Viterbi School of Engineering, University of Southern California, Los Angeles, CA, USA
| | - J Reyes
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - M L Serre
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - W Vizuete
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - C Sioutas
- USC Viterbi School of Engineering, University of Southern California, Los Angeles, CA, USA
| | - T E Morgan
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA
| | - M Gatz
- Department of Psychology, University of Southern California, Los Angeles, CA, USA
- Memory and Aging Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - H C Chui
- Memory and Aging Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Neurology, Keck School of Medicine, University of Southern California,, Los Angeles, CA, USA
| | - S A Shumaker
- Department of Social Sciences and Health Policy, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - S M Resnick
- Laboratory of Behavioral Neuroscience, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - M A Espeland
- Division of Public Health Services, Department of Biostatistical Sciences, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - C E Finch
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles, CA, USA
- Memory and Aging Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - J C Chen
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Memory and Aging Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
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17
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Akgun B, Sarı A, Ozturk S, Erol FS, Ozercan IH, Ulu R. Effects of Mucuna pruriens on Free Fatty Acid Levels and Histopathological Changes in the Brains of Rats Fed a High Fructose Diet. Med Princ Pract 2017; 26:561-566. [PMID: 28898884 PMCID: PMC5848471 DOI: 10.1159/000481402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 09/11/2017] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To investigate free fatty acid levels and histopathological changes in the brain of rats fed a high fructose diet (HFrD) and to evaluate the effects of Mucuna pruriens, known to have antidiabetic activity, on these changes. MATERIALS AND METHODS The study comprised 28 mature female Wistar rats. The rats were divided into 4 groups, each included 7 rats. Group 1: control; group 2: fed an HFrD; group 3: fed normal rat chow and M. pruriens; group 4: fed an HFrD and M. pruriens for 6 weeks. At the end of 6 weeks, the rats were decapitated, blood and brain tissues were obtained. Serum glucose and triglyceride levels were measured. Free fatty acid levels were measured in 1 cerebral hemisphere of each rat and histopathological changes in the other. The Mann-Whitney U test was used to compare quantitative continuous data between 2 independent groups, and the Kruskal-Wallis test was used to compare quantitative continuous data between more than 2 independent groups. RESULTS Arachidonic acid and docosahexaenoic acid levels were significantly higher in group 2 than in group 1 (p < 0.05). Free arachidonic acid and docosahexaenoic acid levels in group 4 were significantly less than in group 2 (p < 0.05). Histopathological examination of group 2 revealed extensive gliosis, neuronal hydropic degeneration, and edema. In group 4, gliosis was much lighter than in group 2, and edema was not observed. Neuronal structures in group 4 were similar to those in group 1. CONCLUSIONS The HFrD increased the levels of free arachidonic acid and docosahexaenoic acid probably due to membrane degradation resulting from possible oxidative stress and inflammation in the brain. The HFrD also caused extensive gliosis, neuronal hydropic degeneration, and edema. Hence, M. pruriens could have therapeutic effects on free fatty acid metabolism and local inflammatory responses in the brains of rats fed an HFrD.
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Affiliation(s)
- Bekir Akgun
- Department of Neurosurgery, Firat University, Elazig, Turkey
- *Bekir Akgun, MD, Department of Neurosurgery, Firat University Hospital, TR-23119 Elazig (Turkey), E-Mail
| | - Aysel Sarı
- Department of Chemistry/Biochemistry, Firat University, Elazig, Turkey
| | - Sait Ozturk
- Department of Neurosurgery, Firat University, Elazig, Turkey
| | | | | | - Ramazan Ulu
- Department of Internal Medicine, Firat University, Elazig, Turkey
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18
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Wang C, Yan M, Jiang H, Wang Q, Guan X, Chen J, Wang C. Protective effects of puerarin on acute lung and cerebrum injury induced by hypobaric hypoxia via the regulation of aquaporin (AQP) via NF-κB signaling pathway. Int Immunopharmacol 2016; 40:300-309. [PMID: 27643664 DOI: 10.1016/j.intimp.2016.09.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 09/06/2016] [Accepted: 09/13/2016] [Indexed: 01/21/2023]
Abstract
OBJECTIVE Hypobaric hypoxia, frequently encountered at high altitude, may lead to lung and cerebrum injury. Our study aimed to investigate whether puerarin could exert ameliorative effects on rats exposed to hypobaric hypoxia via regulation of aquaporin (AQP) and NF-κB signaling pathway in lung and cerebrum. MATERIALS AND METHODS 40 Sprague Dawley rats were divided into four groups (normal control group, hypobaric hypoxia group, puerarin group and dexamethasone group). Wet/dry ratio, blood gas, pathological changes of lung and cerebrum and spatial memory were observed in each group. Inflammatory cytokines in bronchoalveolar lavage fluid (BALF) were determined with ELISA and expression of AQP1, AQP4, NF-κB signaling pathway in lung and cerebrum with western blot RESULTS: Puerarin showed significant preventative effects on tissue injury and behavioral changes, as evidenced by histopathological findings and Morris water maze. In addition, levels of inflammatory cytokines in BALF decreased in the two preventative groups compared with those of hypobaric hypoxia group. AQP in lung and cerebrum increased under the condition of hypobaric hypoxia while was down regulated in both two preventative groups. NF-κB and IκB was also inhibited by puerarin. CONCLUSION Our study suggested that lung and cerebrum injury, increased inflammatory cytokines in BALF and increased AQP1, AQP4 and NF-κB signaling pathway occurred under the condition of hypobaric hypoxia. Moreover, puerarin could prevent lung and cerebrum injury of rats exposed to hypobaric hypoxia via down-regulation of inflammatory cytokines, AQP1 and AQP4 expression and NF-κB signaling pathway.
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Affiliation(s)
- Chi Wang
- Department of Clinical Laboratory, PLA General Hospital, 100853 Beijing, People's Republic of China
| | - Muyang Yan
- Department of Hyperbaric Chamber, PLA General Hospital, 100853 Beijing, People's Republic of China
| | - Hui Jiang
- Department of Hyperbaric Chamber, PLA General Hospital, 100853 Beijing, People's Republic of China
| | - Qi Wang
- Outpatient Department of Chinese People's Liberation Army Aviation School, 101023 Beijing, People's Republic of China
| | - Xu Guan
- Department of Hyperbaric Chamber, PLA General Hospital, 100853 Beijing, People's Republic of China
| | - Jingwen Chen
- Department of Hyperbaric Chamber, PLA General Hospital, 100853 Beijing, People's Republic of China
| | - Chengbin Wang
- Department of Clinical Laboratory, PLA General Hospital, 100853 Beijing, People's Republic of China.
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Abstract
BACKGROUND We have previously shown that the selective serotonergic reuptake inhibitor, citalopram, reduces the neural response to reward and aversion in healthy volunteers. We suggest that this inhibitory effect might underlie the emotional blunting reported by patients on these medications. Bupropion is a dopaminergic and noradrenergic reuptake inhibitor and has been suggested to have more therapeutic effects on reward-related deficits. However, how bupropion affects the neural responses to reward and aversion is unclear. METHOD Seventeen healthy volunteers (9 female, 8 male) received 7 days bupropion (150 mg/day) and 7 days placebo treatment, in a double-blind crossover design. Our functional magnetic resonance imaging task consisted of three phases; an anticipatory phase (pleasant or unpleasant cue), an effort phase (button presses to achieve a pleasant taste or to avoid an unpleasant taste) and a consummatory phase (pleasant or unpleasant tastes). Volunteers also rated wanting, pleasantness and intensity of the tastes. RESULTS Relative to placebo, bupropion increased activity during the anticipation phase in the ventral medial prefrontal cortex (vmPFC) and caudate. During the effort phase, bupropion increased activity in the vmPFC, striatum, dorsal anterior cingulate cortex and primary motor cortex. Bupropion also increased medial orbitofrontal cortex, amygdala and ventral striatum activity during the consummatory phase. CONCLUSIONS Our results are the first to show that bupropion can increase neural responses during the anticipation, effort and consummation of rewarding and aversive stimuli. This supports the notion that bupropion might be beneficial for depressed patients with reward-related deficits and blunted affect.
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Affiliation(s)
- Z Dean
- School of Psychology and Clinical Language Sciences, University of Reading,Reading,UK
| | - S Horndasch
- School of Psychology and Clinical Language Sciences, University of Reading,Reading,UK
| | - P Giannopoulos
- School of Psychology and Clinical Language Sciences, University of Reading,Reading,UK
| | - C McCabe
- School of Psychology and Clinical Language Sciences, University of Reading,Reading,UK
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Bake S, Okoreeh AK, Alaniz RC, Sohrabji F. Insulin-Like Growth Factor (IGF)-I Modulates Endothelial Blood-Brain Barrier Function in Ischemic Middle-Aged Female Rats. Endocrinology 2016; 157:61-9. [PMID: 26556536 PMCID: PMC4701884 DOI: 10.1210/en.2015-1840] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In comparison with young females, middle-aged female rats sustain greater cerebral infarction and worse functional recovery after stroke. These poorer stroke outcomes in middle-aged females are associated with an age-related reduction in IGF-I levels. Poststroke IGF-I treatment decreases infarct volume in older females and lowers the expression of cytokines in the ischemic hemisphere. IGF-I also reduces transfer of Evans blue dye to the brain, suggesting that this peptide may also promote blood-brain barrier function. To test the hypothesis that IGF-I may act at the blood-brain barrier in ischemic stroke, 2 approaches were used. In the first approach, middle-aged female rats were subjected to middle cerebral artery occlusion and treated with IGF-I after reperfusion. Mononuclear cells from the ischemic hemisphere were stained for CD4 or triple-labeled for CD4/CD25/FoxP3 and subjected to flow analyses. Both cohorts of cells were significantly reduced in IGF-I-treated animals compared with those in vehicle controls. Reduced trafficking of immune cells to the ischemic site suggests that blood-brain barrier integrity is better maintained in IGF-I-treated animals. The second approach directly tested the effect of IGF-I on barrier function of aging endothelial cells. Accordingly, brain microvascular endothelial cells from middle-aged female rats were cultured ex vivo and subjected to ischemic conditions (oxygen-glucose deprivation). IGF-I treatment significantly reduced the transfer of fluorescently labeled BSA across the endothelial monolayer as well as cellular internalization of fluorescein isothiocyanate-BSA compared with those in vehicle-treated cultures, Collectively, these data support the hypothesis that IGF-I improves blood-brain barrier function in middle-aged females.
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MESH Headings
- Aging
- Animals
- Blood-Brain Barrier/drug effects
- Blood-Brain Barrier/immunology
- Blood-Brain Barrier/metabolism
- Blood-Brain Barrier/pathology
- Brain Ischemia/drug therapy
- Brain Ischemia/immunology
- Brain Ischemia/metabolism
- Brain Ischemia/pathology
- Capillary Permeability/drug effects
- Cell Hypoxia/drug effects
- Cells, Cultured
- Cerebrum/drug effects
- Cerebrum/immunology
- Cerebrum/metabolism
- Cerebrum/pathology
- Drug Implants
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/immunology
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Female
- Humans
- Hypoglycemia/etiology
- Insulin-Like Growth Factor I/administration & dosage
- Insulin-Like Growth Factor I/genetics
- Insulin-Like Growth Factor I/pharmacology
- Insulin-Like Growth Factor I/therapeutic use
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/immunology
- Leukocytes, Mononuclear/metabolism
- Leukocytes, Mononuclear/pathology
- Microvessels/drug effects
- Microvessels/immunology
- Microvessels/metabolism
- Microvessels/pathology
- Nerve Tissue Proteins/agonists
- Nerve Tissue Proteins/antagonists & inhibitors
- Nerve Tissue Proteins/metabolism
- Rats, Sprague-Dawley
- Receptor, IGF Type 1/agonists
- Receptor, IGF Type 1/metabolism
- Recombinant Proteins/administration & dosage
- Recombinant Proteins/pharmacology
- Recombinant Proteins/therapeutic use
- Signal Transduction/drug effects
- Stroke/drug therapy
- Stroke/immunology
- Stroke/metabolism
- Stroke/pathology
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Affiliation(s)
- Shameena Bake
- Women's Health in Neuroscience Program (S.B., A.K.O., F.S.), Department of Neuroscience and Experimental Therapeutics and Department of Microbial Pathogenesis and Immunology (R.C.A.), Texas A&M University Health Science Center, Bryan, Texas 77807
| | - Andre K Okoreeh
- Women's Health in Neuroscience Program (S.B., A.K.O., F.S.), Department of Neuroscience and Experimental Therapeutics and Department of Microbial Pathogenesis and Immunology (R.C.A.), Texas A&M University Health Science Center, Bryan, Texas 77807
| | - Robert C Alaniz
- Women's Health in Neuroscience Program (S.B., A.K.O., F.S.), Department of Neuroscience and Experimental Therapeutics and Department of Microbial Pathogenesis and Immunology (R.C.A.), Texas A&M University Health Science Center, Bryan, Texas 77807
| | - Farida Sohrabji
- Women's Health in Neuroscience Program (S.B., A.K.O., F.S.), Department of Neuroscience and Experimental Therapeutics and Department of Microbial Pathogenesis and Immunology (R.C.A.), Texas A&M University Health Science Center, Bryan, Texas 77807
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Daniele G, Iozzo P, Molina-Carrion M, Lancaster J, Ciociaro D, Cersosimo E, Tripathy D, Triplitt C, Fox P, Musi N, DeFronzo R, Gastaldelli A. Exenatide Regulates Cerebral Glucose Metabolism in Brain Areas Associated With Glucose Homeostasis and Reward System. Diabetes 2015; 64:3406-12. [PMID: 26116695 PMCID: PMC6908417 DOI: 10.2337/db14-1718] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 06/21/2015] [Indexed: 01/01/2023]
Abstract
Glucagon-like peptide 1 receptors (GLP-1Rs) have been found in the brain, but whether GLP-1R agonists (GLP-1RAs) influence brain glucose metabolism is currently unknown. The study aim was to evaluate the effects of a single injection of the GLP-1RA exenatide on cerebral and peripheral glucose metabolism in response to a glucose load. In 15 male subjects with HbA1c of 5.7 ± 0.1%, fasting glucose of 114 ± 3 mg/dL, and 2-h glucose of 177 ± 11 mg/dL, exenatide (5 μg) or placebo was injected in double-blind, randomized fashion subcutaneously 30 min before an oral glucose tolerance test (OGTT). The cerebral glucose metabolic rate (CMRglu) was measured by positron emission tomography after an injection of [(18)F]2-fluoro-2-deoxy-d-glucose before the OGTT, and the rate of glucose absorption (RaO) and disposal was assessed using stable isotope tracers. Exenatide reduced RaO0-60 min (4.6 ± 1.4 vs. 13.1 ± 1.7 μmol/min ⋅ kg) and decreased the rise in mean glucose0-60 min (107 ± 6 vs. 138 ± 8 mg/dL) and insulin0-60 min (17.3 ± 3.1 vs. 24.7 ± 3.8 mU/L). Exenatide increased CMRglu in areas of the brain related to glucose homeostasis, appetite, and food reward, despite lower plasma insulin concentrations, but reduced glucose uptake in the hypothalamus. Decreased RaO0-60 min after exenatide was inversely correlated to CMRglu. In conclusion, these results demonstrate, for the first time in man, a major effect of a GLP-1RA on regulation of brain glucose metabolism in the absorptive state.
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Affiliation(s)
| | | | | | - Jack Lancaster
- University of Texas Health Science Center, San Antonio, TX
| | | | | | | | | | - Peter Fox
- University of Texas Health Science Center, San Antonio, TX
| | - Nicolas Musi
- University of Texas Health Science Center, San Antonio, TX
| | - Ralph DeFronzo
- University of Texas Health Science Center, San Antonio, TX
| | - Amalia Gastaldelli
- University of Texas Health Science Center, San Antonio, TX Institute of Clinical Physiology, Pisa, Italy
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22
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Gastón MS, Schiöth HB, De Barioglio SR, Salvatierra NA. Gabaergic control of anxiety-like behavior, but not food intake, induced by ghrelin in the intermediate medial mesopallium of the neonatal chick. Horm Behav 2015; 67:66-72. [PMID: 25499794 DOI: 10.1016/j.yhbeh.2014.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 11/21/2014] [Accepted: 11/24/2014] [Indexed: 12/20/2022]
Abstract
Ghrelin (Grh) is an endogenous ligand of the growth hormone secretagogue receptor. In neonatal chicks, central Ghr induces anxiogenic-like behavior but strongly inhibits food intake. The intermediate medial mesopallium (IMM) of the chick forebrain has been identified to be a site of the memory formation, and the modulation of the GABAA receptors that are present here modifies the expression of behavior. Thus, the GABAergic system may constitute a central pathway for Ghr action in regulating the processes of food intake and stress-related behaviors. Therefore, we investigated if the effect of systemic administration of bicuculline (GABAA receptor antagonist) and diazepam (benzodiazepine receptor agonist) on the anxiety in an Open Field test and inhibition in food intake induced by Grh (30pmol) when injected into IMM, were mediated by GABAergic transmission. In Open Field test, bicuculline was able to block the anxiogenic-like behavior induced by Ghr, whereas diazepam did not produce it. However, the co-administration of bicuculline or diazepam plus Ghr did not show any change in food intake at 30, 60 and 120min after injection compared to Ghr alone. Our results indicate for the first time that Ghr, injected into the forebrain IMM area, induces an anxiogenic-like behavior, which was blocked by bicuculline but not diazepam, thus suggesting that Ghr plays an important role in the response pattern to acute stressor, involving the possible participation of the GABAergic system. Nevertheless, as neither drug affected the hypophagia induced by intra-IMM Ghr, this suggests that it may be mediated by different mechanisms.
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Affiliation(s)
- M S Gastón
- Departamento de Química, Facultad de Ciencias Exactas Físicas y Naturales, Universidad Nacional de Córdoba, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT-CONICET), Av. Vélez Sarsfield 1611, 5016 Córdoba, Argentina
| | - H B Schiöth
- Section of Functional Pharmacology, Department of Neuroscience, Uppsala University, Institutionen för Neurovetenskap BMC, Box 593, 751 24 Uppsala, Sweden
| | - S R De Barioglio
- Departamento de Farmacología, Facultad de Ciencias Químicas, Instituto de Farmacología Experimental Córdoba (IFEC-CONICET), Haya de la Torre y Medina Allende, Universidad Nacional de Córdoba, Ciudad Universitaria, 5016 Córdoba, Argentina
| | - N A Salvatierra
- Departamento de Química, Facultad de Ciencias Exactas Físicas y Naturales, Universidad Nacional de Córdoba, Instituto de Investigaciones Biológicas y Tecnológicas (IIByT-CONICET), Av. Vélez Sarsfield 1611, 5016 Córdoba, Argentina.
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23
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Hao HF, Liu LM, Liu YY, Liu J, Yan L, Pan CS, Wang MX, Wang CS, Fan JY, Gao YS, Han JY. Inhibitory effect of rhynchophylline on contraction of cerebral arterioles to endothelin 1: role of rho kinase. J Ethnopharmacol 2014; 155:147-153. [PMID: 24814318 DOI: 10.1016/j.jep.2014.04.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 04/13/2014] [Accepted: 04/28/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Rhynchophylline (Rhy) is a major ingredient of Uncaria rhynchophylla (UR) used to reduce blood pressure and ameliorate brain ailments. This study was to examine the role of Rho kinase (ROCK) in the inhibition of Rhy on contraction of cerebral arterioles caused by endothelin 1 (ET-1). MATERIALS AND METHODS Cerebral arterioles of male Wistar rats were constricted with ET-1 for 10 min followed by perfusion of Rhy for 20 min. Changes in the diameters of the arterioles were recorded. The effects of Rhy on contraction of middle cerebral arteries (MCAs) were determined by a Multi-Myograph. Western blotting and immunofluorescent staining were used to examine the effects of Rhy on RhoA translocation and myosin phosphatase target subunit 1 (MYPT1) phosphorylation. RESULTS In vivo, Rhy (30-300 µM) relaxed cerebral arterioles constricted with ET-1 dose-dependently. In vitro, Rhy at lower concentrations (1-100 µM) caused relaxation of rat MCAs constricted with KCl and Bay-K8644 (an agonist of L-type voltage-dependent calcium channels (L-VDCCs)). Rhy at higher concentrations (>100 µM) caused relaxation of rat MCAs constricted with ET-1, which was inhibited by Y27632, a ROCK׳s inhibitor. Western blotting of rat aortas showed that Rhy inhibited RhoA translocation and MYPT1 phosphorylation. Immunofluorescent staining of MCAs confirmed that phosphorylation of MYPT1 caused by ET-1 was inhibited by Rhy. CONCLUSIONS These results demonstrate that Rhy is a potent inhibitor of contraction of cerebral arteries caused by ET-1 in vivo and in vitro. The effect of Rhy was in part mediated by inhibiting RhoA-ROCK signaling.
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Affiliation(s)
- Hui-Feng Hao
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China; Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, 38 Xue Yuan Road, Beijing 100191, China
| | - Li-Mei Liu
- Department of Physiology and Pathophysiology, Peking University Health Science Center, 38 Xue Yuan Road, Beijing 100191, China
| | - Yu-Ying Liu
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
| | - Juan Liu
- Department of Physiology and Pathophysiology, Peking University Health Science Center, 38 Xue Yuan Road, Beijing 100191, China
| | - Li Yan
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
| | - Chun-Shui Pan
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
| | - Ming-Xia Wang
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
| | - Chuan-She Wang
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China; Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, 38 Xue Yuan Road, Beijing 100191, China
| | - Jing-Yu Fan
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China
| | - Yuan-Sheng Gao
- Department of Physiology and Pathophysiology, Peking University Health Science Center, 38 Xue Yuan Road, Beijing 100191, China.
| | - Jing-Yan Han
- Tasly Microcirculation Research Center, Peking University Health Science Center, Beijing 100191, China; Department of Integration of Chinese and Western Medicine, School of Basic Medical Sciences, Peking University, 38 Xue Yuan Road, Beijing 100191, China.
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Abd-Elsameea AA, Moustaf AA, Mohamed AM. Modulation of the oxidative stress by metformin in the cerebrum of rats exposed to global cerebral ischemia and ischemia/reperfusion. Eur Rev Med Pharmacol Sci 2014; 18:2387-2392. [PMID: 25219842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVES Oxidative stress plays a major role in the pathogenesis of ischemic and reperfusion injury to many organs, including the brain. Chronic metformin treatment is associated with a lower risk of stroke in clinical populations. The aim of the present study was to investigate the effect of metformin on the oxidative stress induced in experimental model of incomplete global cerebral ischemia and ischemia/reperfusion in adult male Wistar rats. MATERIALS AND METHODS Metformin was administered to rats orally by gavage 500 mg/kg once daily for one week before induction of cerebral ischemia (rats were subjected to 30 min of ischemia before decapitation) and ischemia/reperfusion (rats were subjected to 30 min of ischemia then 60 minutes of reperfusion before decapitation). The selected parameters for oxidative stress were the activities of the antioxidant enzymes: glutathione peroxidase (GSHPx), superoxide dismutase (SOD), and catalase as well as malondialdehyde (MDA) levels. RESULTS Metformin reduced the elevated activites of GSHPx, SOD and catalase as well as MDA levels in cerebrum of rats exposed to ischemia and ischemia/reperfusion injures. CONCLUSIONS Metformin improved the oxidative stress induced by ischemia and ischemia/reperfusion injuries. This may be a mechanism that explains the cerebroprotective effect of the drug.
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Affiliation(s)
- A A Abd-Elsameea
- Department of Pharmacology, Faculty of Medicine, Zagazig University, Egypt.
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25
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Lu H, Wang SS, Wang WL, Zhang L, Zhao BY. Effect of swainsonine in Oxytropis kansuensis on Golgi α-mannosidase II expression in the brain tissues of Sprague-Dawley rats. J Agric Food Chem 2014; 62:7407-7412. [PMID: 24741992 DOI: 10.1021/jf501299d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The purpose of this study was to observe the effects of swainsonine in Oxytropis kansuensis on the expression of Golgi α-mannosidase II (MAN2A1) in the brain tissues of Sprague-Dawley (SD) rats. Twenty-four SD rats were randomly divided into four groups (experimental groups I, II, and III and a control group) of six animals each. The rats were penned as groups and fed feeds containing either 15% (swainsonine content = 0.003%), 30% (swainsonine content = 0.006%), or 45% (swainsonine content = 0.009%) O. kansuensis for experimental groups I-III, respectively, or complete feed for the control group. One hundred and nineteen days after poisoning, all rats showed neurological disorders at different degrees, which were considered to be successful establishment of a chronic poisoning model of O. kansuensis. Rats were sacrificed, and MAN2A1 expression of brain tissues was detected by immunohistochemistry and RT-PCR. The results showed that MAN2A1 was either not expressed or lowly expressed in the molecular layer of the cerebral cortex and hippocampal layers, but was found to be highly expressed in other areas of the brain. MAN2A1 expression decreased in the cerebrum and cerebellum in experimental groups when compared to the control group, whereas the expression of MAN2A1 mRNA was inhibited in cerebral and cerebellar tissues by O. kansuensis. These results indicated that O. kansuensis treatment could reduce the expression of MAN2A1 in brain tissues of SD rats.
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Affiliation(s)
- Hao Lu
- College of Veterinary Medicine, Northwest A&F University , Yangling, Shaanxi 712100, China
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Michinaga S, Nagase M, Matsuyama E, Yamanaka D, Seno N, Fuka M, Yamamoto Y, Koyama Y. Amelioration of cold injury-induced cortical brain edema formation by selective endothelin ETB receptor antagonists in mice. PLoS One 2014; 9:e102009. [PMID: 25000290 PMCID: PMC4084986 DOI: 10.1371/journal.pone.0102009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 06/13/2014] [Indexed: 12/13/2022] Open
Abstract
Brain edema is a potentially fatal pathological condition that often occurs in stroke and head trauma. Following brain insults, endothelins (ETs) are increased and promote several pathophysiological responses. This study examined the effects of ETB antagonists on brain edema formation and disruption of the blood-brain barrier in a mouse cold injury model (Five- to six-week-old male ddY mice). Cold injury increased the water content of the injured cerebrum, and promoted extravasation of both Evans blue and endogenous albumin. In the injury area, expression of prepro-ET-1 mRNA and ET-1 peptide increased. Intracerebroventricular (ICV) administration of BQ788 (ETB antagonist), IRL-2500 (ETB antagonist), or FR139317 (ETA antagonist) prior to cold injury significantly attenuated the increase in brain water content. Bolus administration of BQ788, IRL-2500, or FR139317 also inhibited the cold injury-induced extravasation of Evans blue and albumin. Repeated administration of BQ788 and IRL-2500 beginning at 24 h after cold injury attenuated both the increase in brain water content and extravasation of markers. In contrast, FR139317 had no effect on edema formation when administrated after cold injury. Cold injury stimulated induction of glial fibrillary acidic protein-positive reactive astrocytes in the injured cerebrum. Induction of reactive astrocytes after cold injury was attenuated by ICV administration of BQ788 or IRL-2500. These results suggest that ETB receptor antagonists may be an effective approach to ameliorate brain edema formation following brain insults.
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Affiliation(s)
- Shotaro Michinaga
- Laboratory of Pharmacology, Faculty of Pharmacy, Osaka Ohtani University, Tonda-bayashi, Osaka, Japan
| | - Marina Nagase
- Laboratory of Pharmacology, Faculty of Pharmacy, Osaka Ohtani University, Tonda-bayashi, Osaka, Japan
| | - Emi Matsuyama
- Laboratory of Pharmacology, Faculty of Pharmacy, Osaka Ohtani University, Tonda-bayashi, Osaka, Japan
| | - Daisuke Yamanaka
- Laboratory of Pharmacology, Faculty of Pharmacy, Osaka Ohtani University, Tonda-bayashi, Osaka, Japan
| | - Naoki Seno
- Laboratory of Pharmacology, Faculty of Pharmacy, Osaka Ohtani University, Tonda-bayashi, Osaka, Japan
| | - Mayu Fuka
- Laboratory of Pharmacology, Faculty of Pharmacy, Osaka Ohtani University, Tonda-bayashi, Osaka, Japan
| | - Yui Yamamoto
- Laboratory of Pharmacology, Faculty of Pharmacy, Osaka Ohtani University, Tonda-bayashi, Osaka, Japan
| | - Yutaka Koyama
- Laboratory of Pharmacology, Faculty of Pharmacy, Osaka Ohtani University, Tonda-bayashi, Osaka, Japan
- * E-mail:
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27
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Belichenko VM, Turganbaeva AS, Shoshenko KA. [Reactivity of microvessels in the cerebral hemispheres and the skeletal muscles in chicken during second half of embryogenesis]. Ross Fiziol Zh Im I M Sechenova 2014; 100:177-186. [PMID: 25470895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
At Leghorn hens in the second half of embryogenesis and in 4-day-old chicks are studied reaction volume flow velocity (VF) in the superficial layers of the cerebral hemispheres and in skeletal muscle (Lazer Doppler FIowmetry) after the local influence of norepinephrine and sodium nitroprusside. It is shown that the response to these substances begins to manifest itself in the hemisphere in the last quarter of embryogenesis and authentically expressed by the end of it and in the chickens. It is noted that the response to these substances skeletal muscle VF (according to the new and previously published data on gastrocnemius and pectoral muscle) is also clearly manifested by the end of embryogenesis.
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Wang KW, Chen HJ, Lu K, Liliang PC, Liang CL, Tsai YD, Cho CL. Simvastatin attenuates the cerebral vascular endothelial inflammatory response in a rat traumatic brain injury. Ann Clin Lab Sci 2014; 44:145-150. [PMID: 24795052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM Traumatic brain injury (TBI) leads to important and deleterious inflammation, as evidenced by edema, cytokine production, induction of nitric oxide synthase, and leukocyte infiltration. After TBI, the activation of cerebral vascular endothelial cells plays a crucial role in the pathogenesis of inflammation. In this study, we hypothesized that the activation of cerebral vascular endothelial cells plays a crucial role in the pathogenesis of inflammation and outcome after TBI. It may represent a key cellular target for statin therapy. METHODS In our study, cortical contusions were induced, and the effect of continuous treatment of simvastatin on behavior and inflammation in adult rats following experimental TBI was evaluated. The treatment group received 15 mg/kg of simvastatin daily for 3 days. Neurological function was assessed with the grip test. RESULTS The results showed that the non-treatment control group had a significantly greater increase in ICAM-1 expression from pre-injury to the post-injury 72 h time point as compared to the expression in treatment group. The treatment group had better neurological function as evidenced in a grip test performed from baseline to 72 h. The analysis of a western blot test and pathology also demonstrated reduced ICAM-1 expression and a smaller area of damage and tissue loss. CONCLUSION Our findings suggest that simvastatin could attenuate the activation of cerebral vascular endothelial inflammatory response and decrease the loss of neurological function and brain tissue.
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Affiliation(s)
- Kuo-Wei Wang
- PhD; Department of Biological Sciences, National Sun Yat-sen University, 70 LienHai Road, Kaohsiung 804, Taiwan; phone: 886 7 6150011 5327; fax: 886 7 6155352; e-mail:
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29
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Li S, Wu C, Chen J, Lu P, Chen C, Fu M, Fang J, Gao J, Zhu L, Liang R, Shen X, Yang H. An effective solution to discover synergistic drugs for anti-cerebral ischemia from traditional Chinese medicinal formulae. PLoS One 2013; 8:e78902. [PMID: 24236065 PMCID: PMC3827340 DOI: 10.1371/journal.pone.0078902] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 09/17/2013] [Indexed: 12/30/2022] Open
Abstract
Recently, the pharmaceutical industry has shifted to pursuing combination therapies that comprise more than one active ingredient. Interestingly, combination therapies have been used for more than 2500 years in traditional Chinese medicine (TCM). Understanding optimal proportions and synergistic mechanisms of multi-component drugs are critical for developing novel strategies to combat complex diseases. A new multi-objective optimization algorithm based on least angle regression-partial least squares was proposed to construct the predictive model to evaluate the synergistic effect of the three components of a novel combination drug Yi-qi-jie-du formula (YJ), which came from clinical TCM prescription for the treatment of encephalopathy. Optimal proportion of the three components, ginsenosides (G), berberine (B) and jasminoidin (J) was determined via particle swarm optimum. Furthermore, the combination mechanisms were interpreted using PLS VIP and principal components analysis. The results showed that YJ had optimal proportion 3(G): 2(B): 0.5(J), and it yielded synergy in the treatment of rats impaired by middle cerebral artery occlusion induced focal cerebral ischemia. YJ with optimal proportion had good pharmacological effects on acute ischemic stroke. The mechanisms study demonstrated that the combination of G, B and J could exhibit the strongest synergistic effect. J might play an indispensable role in the formula, especially when combined with B for the acute stage of stroke. All these data in this study suggested that in the treatment of acute ischemic stroke, besides restoring blood supply and protecting easily damaged cells in the area of the ischemic penumbra as early as possible, we should pay more attention to the removal of the toxic metabolites at the same time. Mathematical system modeling may be an essential tool for the analysis of the complex pharmacological effects of multi-component drug. The powerful mathematical analysis method could greatly improve the efficiency in finding new combination drug from TCM.
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Affiliation(s)
- Shaojing Li
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Chuanhong Wu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jianxin Chen
- Information Center, Beijing University of Chinese Medicine, Beijing, China
| | - Peng Lu
- Institute of Automation, Chinese Academy of Sciences, Beijing, China
| | - Chang Chen
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Meihong Fu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jing Fang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jian Gao
- College of Pharmaceutical Science, Hebei University, Baoding, Hebei, China
| | - Li Zhu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
- Jiangxi University of Traditional Chinese Medicine of pharmacy, Jiangxi University of Traditional Chinese Medicine, NanChang, Jiangxi, China
| | - Rixin Liang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xin Shen
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Hongjun Yang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
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Lu H, Zhang L, Wang SS, Wang WL, Zhao BY. The study of the Oxytropis kansuensis-induced apoptotic pathway in the cerebrum of SD rats. BMC Vet Res 2013; 9:217. [PMID: 24148892 PMCID: PMC4015804 DOI: 10.1186/1746-6148-9-217] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 10/18/2013] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Locoweeds cause significant livestock poisoning and economic loss all over the world. Animals can develop locoism, a chronic neurological disease, after grazing on locoweeds. Oxytropis kansuensis is a variety of locoweed that contains swainsonine as its main toxic ingredient. The purpose of this study was to investigate the apoptotic pathway induced in the cerebrum by swainsonine. RESULTS Twenty-four Sprague-Dawley rats were randomly divided into four groups (experimental groups I, II, III and a control group) and 6 SD rats of each group were feed in 3 cages separately. Rats were penned as groups and fed with feeds containing 15% (SW content 0.03‰), 30% (SW content 0.06‰), or 45% (SW content 0.09‰) O. kansuensis for experimental groups I, II, and III, respectively, or complete feed in the case of the control group. One hundred and nineteen days after poisoning, and all rats showed neurological disorders at different degrees, which were considered to be successful established a chronic poisoning model of O. kansuensis. rats were sacrificed and the expression of Fas, FasL, Bcl-2, Bax as well as cleaved caspase-3, -8 and -9 proteins in brain tissues were detected by Western blot. The results showed that SW treatment up-regulated Fas and Fas ligand (FasL) (P < 0.05), and that there was an increase in Bax and a decrease in Bcl-2 protein (P < 0.01). Moreover, SW treatment significantly increases the activation of caspase-3, 8 and -9, the key effectors in apoptosis pathway (P < 0.01). CONCLUSION Our data suggest that SW induces apoptosis in cells of the brain through death receptor and mitochondria-mediated, caspase-dependent apoptotic pathways in the brain tissue of SD rats.
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Affiliation(s)
- Hao Lu
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
| | - Liang Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
| | - Shan-shan Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
| | - Wen-long Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
| | - Bao-yu Zhao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, People’s Republic of China
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31
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Garoui E, Amara IB, Driss D, Elwej A, Chaabouni SE, Boudawara T, Zeghal N. Effects of cobalt on membrane ATPases, oxidant, and antioxidant values in the cerebrum and cerebellum of suckling rats. Biol Trace Elem Res 2013; 154:387-95. [PMID: 23857379 PMCID: PMC3744383 DOI: 10.1007/s12011-013-9746-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 06/25/2013] [Indexed: 01/13/2023]
Abstract
Chronic overexposure to cobalt (Co) may result in neurotoxic effects, but the mechanism of Co-induced neurotoxicity is not yet well established. Our study was conducted to determine whether Co is associated to the induction of central nervous system damage in pregnant rats and their progeny. Twelve pregnant female rats were randomly divided into 2 groups: group I served as controls and group II received Co (350 mg/L, orally). Treatments started from the 14th day of pregnancy until day 14 after delivery. Co concentration in plasma was higher in the treated groups than in the controls. Exposure to Co also increased the levels of MDA, PCO, H2O2, and AOPP, while Na(+)K(+)-ATPase and Mg(2+)-ATPase, AChE, and BuChE activities decreased in the cerebrum and cerebellum of suckling pups. A smear without ladder formation on agarose gel was also shown in the cerebrum and cerebellum, indicating random DNA degradation. A reduction in GPx, SOD, CAT, GSH, NPSH, and vitamin C values was observed. The changes were confirmed by histological results. In conclusion, these data showed that the exposure of pregnant and lactating rats to Co resulted in the development of oxidative stress and the impairment of defense systems in the cerebrum and cerebellum of their suckling pups.
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Affiliation(s)
- Elmouldi Garoui
- Animal Physiology Laboratory, Life Sciences Department, Sfax Faculty of Sciences, University of Sfax, BP 1171, 3000 Sfax, Tunisia
| | - Ibtissem Ben Amara
- Animal Physiology Laboratory, Life Sciences Department, Sfax Faculty of Sciences, University of Sfax, BP 1171, 3000 Sfax, Tunisia
| | - Dorra Driss
- Enzymes and Bioconversions Laboratory, National Engineering School, University of Sfax, BP 1173, 3038 Sfax, Tunisia
| | - Awatef Elwej
- Animal Physiology Laboratory, Life Sciences Department, Sfax Faculty of Sciences, University of Sfax, BP 1171, 3000 Sfax, Tunisia
| | - Semia Ellouze Chaabouni
- Enzymes and Bioconversions Laboratory, National Engineering School, University of Sfax, BP 1173, 3038 Sfax, Tunisia
| | - Tahia Boudawara
- Anatomopathology Laboratory, CHU Habib Bourguiba, University of Sfax, 3029 Sfax, Tunisia
| | - Najiba Zeghal
- Animal Physiology Laboratory, Life Sciences Department, Sfax Faculty of Sciences, University of Sfax, BP 1171, 3000 Sfax, Tunisia
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Marquet F, Boch AL, Pernot M, Montaldo G, Seilhean D, Fink M, Tanter M, Aubry JF. Non-invasive ultrasonic surgery of the brain in non-human primates. J Acoust Soc Am 2013; 134:1632-1639. [PMID: 23927203 DOI: 10.1121/1.4812888] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
High-intensity focused ultrasound causes selective tissue necrosis efficiently and safely, namely, in the prostate, liver, and uterine fibroid. Nevertheless, ablation of brain tissue using focused ultrasound remains limited due to strong aberrations induced by the skull. To achieve ultrasonic transcranial brain ablation, such aberrations have to be compensated. In this study, non-invasive therapy was performed on monkeys using adaptive correction of the therapeutic beam and 3D simulations of transcranial wave propagation based on 3D computed tomographic (CT) scan information. The aim of the study was two-fold: induce lesions in a non-human primate brain non-invasively and investigate the potential side effects. Stereotactic targeting was performed on five Macaca fascicularis individuals. Each hemisphere was treated separately with a 15-day interval and animals were sacrificed two days after the last treatment. The ultrasonic dose delivered at the focus was increased from one treatment location to the other to estimate the thermal dose for tissue alteration. Thermal doses in the brain were determined by numerical computations. Treatment efficiency and safety were evaluated histologically. The threshold for tissue damage in the brain was measured to be between 90 and 280 cumulative equivalent minutes at 43 °C. Intravenous injection of corticoids before the treatment limited the side effects.
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Affiliation(s)
- Fabrice Marquet
- Institut Langevin, ESPCI-ParisTech, CNRS UMR7587, INSERM U979, Paris, France
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Abstract
The effect of phenobarbital, carbamazepine, valproate sodium, depakine, topiramate and lamotrigine on the content of NO and NO-synthase activity in white rat brain tissues has been studied. It was established that the action of carbamazepine, valproate sodium, topiramate and lamotrigine decreases the activity of NO-synthase and the level of NO in the brain tissues. The amount of NO does not change while NO-synthase activity increases with the introduction of phenobarbital. The involvement of nitric oxide in the mechanism of action of the studied anticonvulsant drugs is discussed.
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Sakamoto M, Yasutake A, Kakita A, Ryufuku M, Chan HM, Yamamoto M, Oumi S, Kobayashi S, Watanabe C. Selenomethionine protects against neuronal degeneration by methylmercury in the developing rat cerebrum. Environ Sci Technol 2013; 47:2862-2868. [PMID: 23398308 DOI: 10.1021/es304226h] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Although many experimental studies have shown that selenium protects against methylmercury (MeHg) toxicity at different end points, the direct interactive effects of selenium and MeHg on neurons in the brain remain unknown. Our goal is to confirm the protective effects of selenium against neuronal degeneration induced by MeHg in the developing postnatal rat brain using a postnatal rat model that is suitable for extrapolating the effects of MeHg to the fetal brain of humans. As an exposure source of selenium, we used selenomethionine (SeMet), a food-originated selenium. Wistar rats of postnatal days 14 were orally administered with vehicle (control), MeHg (8 mg Hg/kg/day), SeMet (2 mg Se/kg/day), or MeHg plus SeMet coexposure for 10 consecutive days. Neuronal degeneration and reactive astrocytosis were observed in the cerebral cortex of the MeHg-group but the symptoms were prevented by coexposure to SeMet. These findings serve as a proof that dietary selenium can directly protect neurons against MeHg toxicity in the mammalian brain, especially in the developing cerebrum.
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Affiliation(s)
- Mineshi Sakamoto
- National Institute for Minamata Disease, Minamata, Kumamoto 867-0008, Japan.
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Chastre A, Bélanger M, Beauchesne E, Nguyen BN, Desjardins P, Butterworth RF. Inflammatory cascades driven by tumor necrosis factor-alpha play a major role in the progression of acute liver failure and its neurological complications. PLoS One 2012; 7:e49670. [PMID: 23166746 PMCID: PMC3499491 DOI: 10.1371/journal.pone.0049670] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 10/12/2012] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND/AIMS Acute liver failure (ALF) due to ischemic or toxic liver injury is a clinical condition that results from massive loss of hepatocytes and may lead to hepatic encephalopathy (HE), a serious neuropsychiatric complication. Although increased expression of tumor necrosis factor-alpha (TNF-α) in liver, plasma and brain has been observed, conflicting results exist concerning its roles in drug-induced liver injury and on the progression of HE. The present study aimed to investigate the therapeutic value of etanercept, a TNF-α neutralizing molecule, on the progression of liver injury and HE in mice with ALF resulting from azoxymethane (AOM) hepatotoxicity. METHODS/PRINCIPAL FINDINGS Mice were administered saline or etanercept (10 mg/kg; i.p.) 30 minutes prior to, or up to 6 h after AOM. Etanercept-treated ALF mice were sacrificed in parallel with vehicle-treated comatose ALF mice and controls. AOM induced severe hepatic necrosis, leading to HE, and etanercept administered prior or up to 3 h after AOM significantly delayed the onset of coma stages of HE. Etanercept pretreatment attenuated AOM-induced liver injury, as assessed by histological examination, plasma ammonia and transaminase levels, and by hepatic glutathione content. Peripheral inflammation was significantly reduced by etanercept as shown by decreased plasma IL-6 (4.1-fold; p<0.001) and CD40L levels (3.7-fold; p<0.001) compared to saline-treated ALF mice. Etanercept also decreased IL-6 levels in brain (1.2-fold; p<0.05), attenuated microglial activation (assessed by OX-42 immunoreactivity), and increased brain glutathione concentrations. CONCLUSIONS These results indicate that systemic sequestration of TNF-α attenuates both peripheral and cerebral inflammation leading to delayed progression of liver disease and HE in mice with ALF due to toxic liver injury. These results suggest that etanercept may provide a novel therapeutic approach for the management of ALF patients awaiting liver transplantation.
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Affiliation(s)
- Anne Chastre
- Neuroscience Research Unit, Hôpital Saint-Luc, CRCHUM, Montreal, Canada
| | - Mireille Bélanger
- Neuroscience Research Unit, Hôpital Saint-Luc, CRCHUM, Montreal, Canada
| | | | - Bich N. Nguyen
- Département de pathologie, Hôpital Saint-Luc, CHUM, Montreal, Canada
| | - Paul Desjardins
- Neuroscience Research Unit, Hôpital Saint-Luc, CRCHUM, Montreal, Canada
| | - Roger F. Butterworth
- Neuroscience Research Unit, Hôpital Saint-Luc, CRCHUM, Montreal, Canada
- * E-mail:
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Abstract
A positivity advantage is known in emotional word recognition in that positive words are consistently processed faster and with fewer errors compared to emotionally neutral words. A similar advantage is not evident for negative words. Results of divided visual field studies, where stimuli are presented in either the left or right visual field and are initially processed by the contra-lateral brain hemisphere, point to a specificity of the language-dominant left hemisphere. The present study examined this effect by showing that the intake of caffeine further enhanced the recognition performance of positive, but not negative or neutral stimuli compared to a placebo control group. Because this effect was only present in the right visual field/left hemisphere condition, and based on the close link between caffeine intake and dopaminergic transmission, this result points to a dopaminergic explanation of the positivity advantage in emotional word recognition.
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Affiliation(s)
- Lars Kuchinke
- Department of Psychology, Ruhr University Bochum, Bochum, Germany.
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Khudoerkov RM, Voronkov DN, Yamshchikova NG. Immunohistochemical and morphological changes in neurons and neuroglia in the cerebral nigrostriatal structures under conditions of experimental nigral neurodegeneration. Bull Exp Biol Med 2012; 153:893-7. [PMID: 23113312 DOI: 10.1007/s10517-012-1853-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The count of dopamine-containing neurons decreased by 77%, the area of the remaining cells shrank by 75%, and the neuroglia doubled 4 weeks after injection of toxin (6-hydroxydopamine) into the compact part of the substantia nigra of the right cerebral hemisphere of rats, while no changes in the substantia nigra of the left hemisphere were observed. Neurons of the caudate nucleus were virtually unchanged in comparison with the intact control, while the neuroglia was activated: its total volume in the right hemisphere increased by 33% (50% increase in astrocyte count and a 25% increase of the rest neuroglia), while in the left hemisphere only astrocyte count increased by 20%. Astrocyte nuclei in the caudate nuclei of both hemispheres were enlarged by 22-23%. Hence, unilateral destruction of the nigral dopamine-containing neurons stimulated the neuroglia (particularly astroglia) in the caudate nuclei, especially on the side of damage.
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Affiliation(s)
- R M Khudoerkov
- Center of Neurology, Russian Academy of Medical Sciences, Moscow, Russia.
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38
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Chung HH, Yang TT, Chen MF, Chou MT, Cheng JT. Improvement of hyperphagia by activation of cerebral I(1)-imidazoline receptors in streptozotocin-induced diabetic mice. Horm Metab Res 2012; 44:645-9. [PMID: 22674473 DOI: 10.1055/s-0032-1314835] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Imidazoline I1-receptors (I1R) are known to regulate blood pressure and rilmenidine, an agonist, is widely used as antihypertensive agent in clinic. However, the role of I1R in feeding behavior is still unclear. In the present study, we used the agonist of I1R to investigate the effect on hyperphagia in streptozotocin (STZ)-induced diabetic mice. Rilmenidine decreased the food intake of STZ-diabetic mice in a dose-dependent manner. The reduction of food intake was abolished by pretreatment with efaroxan at the dose sufficient to block I1R. Intracerebroventricular (icv) administration of rilmenidine into STZ-diabetic mice also significantly reduced hyperphagia, which was reversed by icv administration of efaroxan. In addition, similar results were observed in STZ-diabetic mice, which received chronic treatment with rilmenidine 3 times daily (t.i.d.) for 7 days. Moreover, the hypothalamic neuropeptide Y (NPY) level was reduced by rilmenidine that was also reversed by pretreatment with efaroxan. In conclusion, the obtained results suggest that rilmenidine can decrease food intake in STZ-diabetic mice through an activation of I1R to lower hypothalamic NPY level.
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Affiliation(s)
- H H Chung
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan City, Taiwan
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Zeng LL, Liu L, Liu Y, Shen H, Li Y, Hu D. Antidepressant treatment normalizes white matter volume in patients with major depression. PLoS One 2012; 7:e44248. [PMID: 22957005 PMCID: PMC3431303 DOI: 10.1371/journal.pone.0044248] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 07/31/2012] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE To investigate white matter volume abnormalities in patients with major depression and the effects of antidepressant treatment on white matter volume. METHOD Magnetic resonance imaging (MRI) was performed on 32 treatment-naïve depressed patients, 17 recovered patients who had received antidepressant treatment and subsequently achieved clinical recovery and 34 matched controls. RESULTS Relative to the healthy controls, the treatment-naïve depressed patients showed increased white matter volumes in the left dorsolateral prefrontal cortex (DLPFC) and left putamen and reduced white matter volumes in the left cerebellum posterior lobe and left inferior parietal lobule. For the treatment-naïve patients, the length in months of the current depressive episode was positively correlated with the white matter volumes in both the left DLPFC and left putamen. In the recovered patients, the differences in white matter volume were no longer statistically significant relative to healthy controls. No significant difference was found in the total white matter volume among the three groups. CONCLUSIONS This study demonstrates that there were alterations in the white matter volumes of depressed patients, which might disrupt the neural circuits that are involved in emotional and cognitive function and thus contribute to the pathophysiology of depression. The finding of the significant correlations between refractoriness and the white matter volumes in the left DLPFC and left putamen combined with the finding that antidepressant treatment normalized the white matter volume of recovered patients, suggests that a quantitative, structural MRI measurement could act as a potential biomarker in depression therapy for individual subjects.
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Affiliation(s)
- Ling-Li Zeng
- College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, People’s Republic of China
| | - Li Liu
- Department of Psychiatry, First Affiliated Hospital, China Medical University, Shenyang, Liaoning, People’s Republic of China
| | - Yadong Liu
- College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, People’s Republic of China
| | - Hui Shen
- College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, People’s Republic of China
| | - Yaming Li
- Department of Nuclear Medicine, First Affiliated Hospital, China Medical University, Shenyang, Liaoning, People’s Republic of China
- * E-mail: (DH); (YML)
| | - Dewen Hu
- College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, People’s Republic of China
- * E-mail: (DH); (YML)
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Cassone CG, Taylor JJ, O'Brien JM, Williams A, Yauk CL, Crump D, Kennedy SW. Transcriptional profiles in the cerebral hemisphere of chicken embryos following in ovo perfluorohexane sulfonate exposure. Toxicol Sci 2012; 129:380-91. [PMID: 22790973 DOI: 10.1093/toxsci/kfs219] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
In a recent egg injection study, we showed that in ovo exposure to perfluorohexane sulfonate (PFHxS) affects the pipping success of developing chicken (Gallus gallus domesticus) embryos. We also found evidence of thyroid hormone (TH) pathway interference at multiple levels of biological organization (i.e., somatic growth, messenger RNA expression, and circulating free thyroxine levels). Based on these findings, we hypothesize that PFHxS exposure interferes with TH-dependent neurodevelopmental pathways. This study investigates global transcriptional profiles in cerebral hemispheres of chicken embryos following exposure to a solvent control, 890 or 38,000 ng PFHxS/g egg (n = 4-5 per group); doses that lead to the adverse effects indicated above. PFHxS significantly alters the expression (≥ 1.5-fold, p ≤ 0.001) of 11 transcripts at the low dose (890 ng/g) and 101 transcripts at the high dose (38,000 ng/g). Functional enrichment analysis shows that PFHxS affects genes involved in tissue development and morphology, cellular assembly and organization, and cell-to-cell signaling. Pathway and interactome analyses suggest that genes may be affected through several potential regulatory molecules, including integrin receptors, myelocytomatosis viral oncogene, and CCAAT/enhancer-binding protein. This study identifies key functional and regulatory modes of PFHxS action involving TH-dependent and -independent neurodevelopmental pathways. Some of these TH-dependent mechanisms that occur during embryonic development include tight junction formation, signal transduction, and integrin signaling, whereas TH-independent mechanisms include gap junction intercellular communication.
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Affiliation(s)
- Cristina G Cassone
- Environment Canada, National Wildlife Research Centre, Ottawa, Ontario, Canada K1A 0H3
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Han Z, Cheng ZH, Liu S, Yang JL, Xiao MJ, Zheng RY, Hou ST. Neurovascular protection conferred by 2-BFI treatment during rat cerebral ischemia. Biochem Biophys Res Commun 2012; 424:544-8. [PMID: 22771326 DOI: 10.1016/j.bbrc.2012.06.152] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 06/28/2012] [Indexed: 11/19/2022]
Abstract
Stroke is caused by vascular dysfunction and currently there are no effective therapeutics to stroke induced brain damage. In contrast to an intense emphasis on neuroprotection, relatively few studies have addressed means of vascular protection in cerebral ischemia. Here we discovered that the ligand to immidazolin receptor, 2-BFI, not only provided potent neuroprotection during middle cerebral artery occlusion in rat, which confirmed our previous reports, but also protected the integrity of the cerebral vasculature. Treatment with 2-BFI twice daily after the occlusion of the middle cerebral artery for 14 d significantly improved the neurological deficits, reduced brain infarction, and importantly, protected the cerebral vasculature as evidenced by the increased expression of an endothelial marker, von Willebrand factor, and better preservation of the cerebral vasculature, as viewed under a confocal microscope on rat brain perfused with FITC-labeled dextran. These results indicated that 2-BFI contributes to protection of neurovasculature. Understanding the molecular mechanisms could eventually lead to development of more effective therapies for stroke.
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Affiliation(s)
- Zhao Han
- Division of Stroke Medicine, Department of Neurology, The First Affiliated Hospital and Research Institute of Experimental Neurobiology, Wenzhou Medical College, No. 2 Fuxue Lane, Wenzhou City, Zhejiang Province 325000, PR China.
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Thimm E, Richter-Werkle R, Kamp G, Molke B, Herebian D, Klee D, Mayatepek E, Spiekerkoetter U. Neurocognitive outcome in patients with hypertyrosinemia type I after long-term treatment with NTBC. J Inherit Metab Dis 2012; 35:263-8. [PMID: 22069142 DOI: 10.1007/s10545-011-9394-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 09/04/2011] [Accepted: 09/08/2011] [Indexed: 10/15/2022]
Abstract
OBJECTIVE The implementation of NTBC into treatment of hypertyrosinemia type I (HT I) greatly improved survival by prevention of acute liver failure and hepatocellular carcinoma. However, there are first reports of cognitive impairment in patients with elevated plasma tyrosine concentrations. METHODS We here assess the neurocognitive development using standardized psychometric test batteries with respect to cognition, motor abilities and speech in nine early-treated patients with HT I under long-term NTBC treatment. RESULTS High plasma tyrosine concentrations were frequently documented resulting in elevated 12-month median plasma tyrosine concentrations in seven out of nine patients. Plasma NTBC concentrations were generally in the lower therapeutic range. Five out of seven patients (71%) above 3 years of age had a total IQ score below the average. In addition, five out of seven patients above 3 years showed an inhomogenous test profile with significant differences between the different testing scales. Motor abilities were subnormal in four out of seven patients(57%). Cerebral MRI revealed no abnormalities. Logopedic evaluation in children at school age documented dysfunction or retardation in language development in all but one of the tested patients (80%), however, all but one patients had a migration background. CONCLUSIONS A high number of patients performed below normal in the assessment of development, motor function and speech. We propose intellectual impairment as long-term complication in HT type I with elevated plasma tyrosine under NTBC treatment as observed in other hypertyrosinemias. These findings remain to be reproduced in greater patient numbers.
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Affiliation(s)
- Eva Thimm
- Department of General Pediatrics, Medical Faculty, University Dusseldorf, Moorenstrasse 5, 40225, Düsseldorf, Germany.
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Savos'ko SI, Chaĭkovs'kyĭ IB, Pogoriela NK, Makarenko OM. [Histostructural changes of rat cerebral cortex during hemorrhagic stroke modeling]. Fiziol Zh (1994) 2012; 58:28-35. [PMID: 23233944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Pathological changes during modeling of primary and secondary acute hemorrhagic stroke were studied in rats. We revealed differences in the activity of pharmacological action of medications under condition of acute stroke. The action of medications increased viability of neurons in both hemispheres of rat cerebrum at a right-side primary and secondary hemorrhagic stroke. Following secondary stroke, the amount of degenerative neurons amounted 25.5 +/- 0.8 cells/mm2, following the action ofcerebrolysin this value was 17.6 +/- 1.7 cells/ mm2 and after the action of cortexine and cerebral this value amounted 18.0 +/- 0.9 cells/mm2 and 10.7 +/- 0.4 cells/ mm2, respectively. In control animals the number of degenerative neurons did not exceed 2% and averaged 1.5 +/- 0.1 cells/mm2. Analysis of the morphological and statistical data showed that the most effective remedies under the primary and secondary hemorrhagic insult are cortexine and cerebral. Cerebral was found to be more effective.
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Simon L, Toth J, Molnar L, Agoston DV. MRI analysis of mGluR5 and mGluR1 antagonists, MTEP and R214127 in the cerebral forebrain of awake, conscious rats. Neurosci Lett 2011; 505:155-9. [PMID: 22015763 DOI: 10.1016/j.neulet.2011.10.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 08/18/2011] [Accepted: 10/04/2011] [Indexed: 12/18/2022]
Abstract
Metabotropic glutamate receptors mGluR5 and mGluR1 mediate key neuropsychiatric functions in health and disease and their antagonists hold promise to treat anxiety, depression, inflammation, and neuropathic pain. Pharmacological magnetic resonance imaging (phMRI) using a functional MRI approach in awake, conscious rodents can determine the activities of receptor ligands without the potential interference of anesthetics and independent of the specific biochemical mechanism of action of the candidate molecule. In this study we determined the neuronal activation patterns of 3-[(2-methyl-1,3-thiazol-4-yl)ethynyl]pyridine (MTEP) and 1-(3,4-dihydro-2H-pyrano[2,3-b]quinolin-7-yl0-2phenyl-1-ethanone (R214127), antagonists of mGluR5 and mGluR1 receptors by phMRI. We found that MTEP and R214127 activated specific primary somatosensory, piriform, entorhinal and motor cortices and the caudateputamen each to a different extent and in partly overlapping manners. Additional analysis of the activation data indicated that these brain regions and their connections are involved in mediating neuropathic pain and also, reward and olfaction. Using awake, conscious animals in phMRI can be a useful approach in characterizing candidate mGluR5 and mGlR1 antagonists also allowing a more direct comparison of animal and human phMRI studies.
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Affiliation(s)
- Laszlo Simon
- Neuronomix Inc., 5620 Sonoma Rd., Bethesda, MD 20817, USA
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Greifzu F, Schmidt S, Schmidt KF, Kreikemeier K, Witte OW, Löwel S. Global impairment and therapeutic restoration of visual plasticity mechanisms after a localized cortical stroke. Proc Natl Acad Sci U S A 2011; 108:15450-5. [PMID: 21873250 PMCID: PMC3174619 DOI: 10.1073/pnas.1016458108] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We tested the influence of a photothrombotic lesion in somatosensory cortex on plasticity in the mouse visual system and the efficacy of anti-inflammatory treatment to rescue compromised learning. To challenge plasticity mechanisms, we induced monocular deprivation (MD) in 3-mo-old mice. In control animals, MD induced an increase of visual acuity of the open eye and an ocular dominance (OD) shift towards this eye. In contrast, after photothrombosis, there was neither an enhancement of visual acuity nor an OD-shift. However, OD-plasticity was present in the hemisphere contralateral to the lesion. Anti-inflammatory treatment restored sensory learning but not OD-plasticity, as did a 2-wk delay between photothrombosis and MD. We conclude that (i) both sensory learning and cortical plasticity are compromised in the surround of a cortical lesion; (ii) transient inflammation is responsible for impaired sensory learning, suggesting anti-inflammatory treatment as a useful adjuvant therapy to support rehabilitation following stroke; and (iii) OD-plasticity cannot be conceptualized solely as a local process because nonlocal influences are more important than previously assumed.
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Affiliation(s)
- Franziska Greifzu
- Institut für Allgemeine Zoologie und Tierphysiologie, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany; and
| | - Silvio Schmidt
- Hans-Berger Klinik für Neurologie, Universitätsklinikum Jena, D-07747 Jena, Germany
| | - Karl-Friedrich Schmidt
- Institut für Allgemeine Zoologie und Tierphysiologie, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany; and
| | - Klaus Kreikemeier
- Institut für Allgemeine Zoologie und Tierphysiologie, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany; and
| | - Otto W. Witte
- Hans-Berger Klinik für Neurologie, Universitätsklinikum Jena, D-07747 Jena, Germany
| | - Siegrid Löwel
- Institut für Allgemeine Zoologie und Tierphysiologie, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany; and
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Guan W, Somanath PR, Kozak A, Goc A, El-Remessy AB, Ergul A, Johnson MH, Alhusban A, Soliman S, Fagan SC. Vascular protection by angiotensin receptor antagonism involves differential VEGF expression in both hemispheres after experimental stroke. PLoS One 2011; 6:e24551. [PMID: 21912702 PMCID: PMC3164729 DOI: 10.1371/journal.pone.0024551] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Accepted: 08/12/2011] [Indexed: 11/18/2022] Open
Abstract
We identified that the angiotensin receptor antagonist, candesartan, has profound neurovascular protective properties when administered after ischemic stroke and was associated with a proangiogenic state at least partly explained by vascular endothelial growth factor A (VEGFA). However, the spatial distribution of vascular endothelial growth factor (VEGF) isoforms and their receptors remained unknown. Protein analysis identified a significant increase in vascular endothelial grow factor B (VEGFB) in the cerebrospinal fluid (CSF) and the ischemic hemispheres (with increased VEGF receptor 1 activation) of treated animals (p<0.05) which was co-occurring with an increase in protein kinase B (Akt) phosphorylation (p<0.05). An increase in VEGFA protein in the contralesional hemisphere corresponded to a significant increase in vascular density at seven days (p<0.01) after stroke onset. Vascular restoration by candesartan after stroke maybe related to differential regional upregulation of VEGFB and VEGFA, promoting a “prosurvival state” in the ischemic hemisphere and angiogenesis in the contralesional side, respectively. These vascular changes in both hemispheres after effective treatment are likely to contribute to enhanced recovery after stroke.
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Affiliation(s)
- Weihua Guan
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
| | - Payaningal R. Somanath
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
| | - Anna Kozak
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
| | - Anna Goc
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
| | - Azza B. El-Remessy
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
| | - Adviye Ergul
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
- Departments of Physiology, Georgia Health Sciences University, Augusta, Georgia, United States of America
| | - Maribeth H. Johnson
- Department of Biostatistics, Georgia Health Sciences University, Augusta, Georgia, United States of America
| | - Ahmed Alhusban
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
| | - Sahar Soliman
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
| | - Susan C. Fagan
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, Augusta, Georgia, United States of America
- Charlie Norwood VA Medical Center, Augusta, Georgia, United States of America
- Department of Neurology, Georgia Health Sciences University, Augusta, Georgia, United States of America
- * E-mail:
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Wisor JP, Schmidt MA, Clegern WC. Cerebral microglia mediate sleep/wake and neuroinflammatory effects of methamphetamine. Brain Behav Immun 2011; 25:767-76. [PMID: 21333736 DOI: 10.1016/j.bbi.2011.02.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Revised: 01/27/2011] [Accepted: 02/04/2011] [Indexed: 02/06/2023] Open
Abstract
Methamphetamine and modafinil exert their wake-promoting effects by elevating monoaminergic tone. The severity of hypersomnolence that occurs subsequent to induced wakefulness differs between these two agents. Microglia detects and modulates CNS reactions to agents such as D-methamphetamine that induce cellular stress. We therefore hypothesized that changes in the sleep/wake cycle that occur subsequent to administration of D-methamphetamine are modulated by cerebral microglia. In CD11b-herpes thymidine kinase transgenic mice (CD11b-TK(mt-30)), activation of the inducible transgene by intracerebroventricular (icv) ganciclovir results in toxicity to CD11b-positive cells (i.e. microglia), thereby reducing cerebral microglial cell counts. CD11b-TK(mt-30)and wild type mice were subjected to chronic icv ganciclovir or vehicle administration with subcutaneous mini-osmotic pumps. D-methamphetamine (1 and 2 mg/kg), modafinil (30 and 100 mg/kg) and vehicle were administered intraperitoneally to these animals. In CD11b-TK(mt-30) mice, but not wild type, icv infusion of ganciclovir reduced the duration of wake produced by D-methamphetamine at 2 mg/kg by nearly 1h. Nitric oxide synthase (NOS) activity, studied ex vivo, and NOS expression were elevated in CD11b-positive cerebral microglia from wild type mice acutely exposed to d-methamphetamine. Additionally, CD11b-positive microglia, but not other cerebral cell populations, exhibited changes in sleep-regulatory cytokine expression in response to d-METH. Finally, CD11b-positive microglia exposed to d-methamphetamine in vitro exhibited increased NOS activity relative to pharmacologically-naïve cells. CD11b-positive microglia from the brains of neuronal NOS (nNOS)-knockout mice failed to exhibit this effect. We propose that the effects of D-METH on sleep/wake cycles are mediated in part by actions on microglia, including possibly nNOS activity and cytokine synthesis.
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Affiliation(s)
- Jonathan P Wisor
- Department of Veterinary Comparative Anatomy, Pharmacology and Physiology, WWAMI Medical Education Program, Washington State University, Spokane, WA 99202, USA.
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Zhang YN, Piao FY, Lv FY, Lv H. [Screening the proteins of organophosphoms ester-induced delayed neurotoxicity in the cerebral tissue of hens exposed to tri-ortho-cresyl phosphate]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2011; 29:364-366. [PMID: 21972534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To screen the proteins with differential expression levels in the cerebral tissue of hens exposed to tri-ortho-cresyl phosphate (TOCP), and to provide target proteins for studying the mechanism of organophosphoms ester-induced delayed neurotoxicity (OPIDN). METHODS Thirty two adult Roman hens were randomly divided into four groups: TOCP group was exposed to 1000 mg/kg TOCP, PMSF group was exposed to 40 mg/kg PMSF, PMSF plus TOCP group was exposed to 40 mg/kg PMSF and after 24 h exposed to 1000 mg/kg TOCP, control group was exposed to normal saline. All hens exposed to chemicals by gastro-intestine for 5 days were sacrificed, and the cerebral tissue were dissected and homogenized in ice bath. Total proteins extracted from the cerebral tissue were separated by isoelectric focusing as the first dimension and SDS-PAGE as the second dimension. The 2-DE maps were visualized after silver staining and analyzed by Image Master 2D software. At last ,the expressed protein spots were identified by Mass spectrometry. RESULTS From total proteins in TOCP group, the PMSF plus TOCP group and PMSF group, 1185, 1294 and 1063 spots were detected, respectively. One thousand three hundred thirty two spots from total proteins in control group were detected. The match rates of protein spots in TOCP group, the PMSF plus TOCP group and PMSF group were 78.32 %, 79.56 % and 80.93%, respectively. There were 235 protein spots with differential expression levels between TOCP group and control group, which included 158 up regulation spots and 77 down regulation spots. According to the PMSF features, there were 102 spots with differential expression levels between TOCP group and control group and without differential expression levels between TOCP group and PMSF plus TOCP group, among them there were 13 spots with 4 fold differential expression levels between TOCP group and control group and without differential expression levels between TOCP group and PMSF group. Seven protein spots (homer-1b, Destrin, heat shock protein 70, eukaryotic translation initiation factors, proteasome alpha1 subunit, lactate dehydrogenase B, glutamine synthetase) were detected by Mass spectrometry. CONCLUSION There are 112 protein spots with differential expression levels of the cerebral tissue in TOCP group, which may be related to OPIDN, among them 13 protein spots with differential expression levels are associated closely with OPIDN. Seven protein spots detected by Mass spectrometry may be related to the mechanism induced by OPIDN.
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Affiliation(s)
- Yan-ning Zhang
- Department of Occupational and Environment Health, Dalian Medical University, Dalian 116044, China
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Affiliation(s)
- Anshoo Malhotra
- Department of Biophysics, Panjab University, Chandigarh, India
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50
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Pederzolli CD, Mescka CP, Zandoná BR, de Moura Coelho D, Sgaravatti AM, Sgarbi MB, de Souza Wyse AT, Duval Wannmacher CM, Wajner M, Vargas CR, Dutra-Filho CS. Acute administration of 5-oxoproline induces oxidative damage to lipids and proteins and impairs antioxidant defenses in cerebral cortex and cerebellum of young rats. Metab Brain Dis 2010; 25:145-54. [PMID: 20431931 DOI: 10.1007/s11011-010-9190-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2009] [Accepted: 07/27/2009] [Indexed: 02/07/2023]
Abstract
5-Oxoproline accumulates in glutathione synthetase deficiency, an autossomic recessive inherited disorder clinically characterized by hemolytic anemia, metabolic acidosis, and severe neurological symptoms whose mechanisms are poorly known. In the present study we investigated the effects of acute subcutaneous administration of 5-oxoproline to verify whether oxidative stress is elicited by this metabolite in vivo in cerebral cortex and cerebellum of 14-day-old rats. Our results showed that the acute administration of 5-oxoproline is able to promote both lipid and protein oxidation, to impair brain antioxidant defenses, to alter SH/SS ratio and to enhance hydrogen peroxide content, thus promoting oxidative stress in vivo, a mechanism that may be involved in the neuropathology of gluthatione synthetase deficiency.
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Affiliation(s)
- Carolina Didonet Pederzolli
- Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, Porto Alegre, RS, Brazil
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