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Neuroprotective effect

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https://www.readbyqxmd.com/read/29684862/antioxidant-effects-of-lycium-barbarum-polysaccharides-on-photoreceptor-degeneration-in-the-light-exposed-mouse-retina
#1
Liujiu Tang, Shuyin Bao, Yu Du, Zengyan Jiang, A O Wuliji, Xiang Ren, Chenghong Zhang, Haiying Chu, Li Kong, Haiying Ma
We assessed the neuroprotective effects of Lycium barbarum Polysaccharides (LBP) on photoreceptor degeneration and the mechanisms involved in oxidative stress in light-exposed mouse retinas. Mice were given a gavage of LBP (150 mg/kg or 300 mg/kg) or phosphate buffered saline (PBS) for 7 days before exposure to light (5000 lx for 24 h). We found that LBP significantly improved the electroretinography (ERG) amplitudes of the a- and b-waves that had been attenuated by light exposure. In addition, changes caused by light exposure including photoreceptor cell loss, nuclear condensation, an increased number of mitochondria vacuoles, outer membrane disc swelling and cristae fractures were distinctly ameliorated by LBP...
April 20, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29684590/a-synthetic-snake-venom-based-tripeptide-glu-val-trp-protects-pc12-cells-from-mpp-toxicity-by-activating-the-ngf-signaling-pathway
#2
Carolina P Bernardes, Neife A G Santos, Flavia M Sisti, Rafaela Scalco Ferreira, Norival A Santos-Filho, Adélia C O Cintra, Eduardo M Cilli, Suely V Sampaio, Antonio C Santos
Venom small peptides that target neurotrophin receptors might be beneficial in neurodegeneration, including Parkinsońs disease (PD). Their small size, ease of synthesis, structural stability and target selectivity make them important tools to overcome the limitations of endogenous neurotrophins as therapeutic agents. Additionally, they might be optimized to improve resistance to enzymatic degradation, bioavailability, potency and, mainly, lipophilicity, important to cross the blood brain barrier (BBB). Here, we evaluated the neuroprotective effects and mechanisms of the synthetic snake-venom-based peptide p-BTX-I (Glu-Val-Trp) in PC12 cells treated with MPP+ (1-methyl-4-phenylpyridinium), a dopaminergic neurotoxin that induces Parkinsonism in vivo...
April 20, 2018: Peptides
https://www.readbyqxmd.com/read/29684508/methylene-blue-ameliorates-olfactory-dysfunction-and-motor-deficits-in-a-chronic-mptp-probenecid-mouse-model-of-parkinson-s-disease
#3
K C Biju, Robert C Evans, Kripa Shrestha, Daniel C B Carlisle, Jonathan Gelfond, Robert A Clark
Mitochondrial dysfunction and oxidative stress are very prominent and early features in Parkinson's disease (PD) and in animal models of PD. Thus, antioxidant therapy for PD has been proposed, but in clinical trials such strategies have met with very limited success. Methylene blue (MB), a small-molecule synthetic heterocyclic organic compound that acts as a renewable electron cycler in the mitochondrial electron transport chain, manifesting robust antioxidant and cell energetics-enhancing properties, has recently been shown to have significant beneficial effects in reducing nigrostriatal dopaminergic loss and motor impairment in acute toxin models of PD...
April 20, 2018: Neuroscience
https://www.readbyqxmd.com/read/29684474/environmental-enrichment-cognitive-neuroprotection-in-an-experimental-model-of-cerebral-ischemia-biochemical-and-molecular-aspects
#4
Lara Vezula Gonçalves, Alice Laschuk Herlinger, Tamara Andrea Alarcon Ferreira, Juliana Barbosa Coitinho, Rita Gomes Wanderley Pires, Cristina Martins-Silva
Stroke is considered a major cause of global morbidity. Currently, there are no effective treatments for post-stroke cognitive impairment. Enriched environment (EE) has been brought forward as a preconditioning method to induce cerebral tolerance in an ischemic event. However, the subjacent mechanisms involved in this tolerance are not yet clear. Herein we aimed to identify the mechanisms of neuroprotection triggered by EE preconditioning in a murine model of ischemic stroke. In order to do so, C57Bl/6 mice were kept for five weeks either in EE or in standard environment (SC) prior to ischemic injury through bilateral carotid occlusion (BCCAo) or sham surgery...
April 20, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29683870/isosteviol-sodium-injection-improves-outcomes-by-modulating-tlrs-nf-%C3%AE%C2%BAb-dependent-inflammatory-responses-following-experimental-traumatic-brain-injury-in-rats
#5
Jie Zan, Hao Zhang, Min-Yi Lu, Hui-Min Beng, Kai-Lun Zhong, Xiao-Ou Sun, Wen Tan
Previous studies have shown that isosteviol sodium (STVNa) protects against permanent cerebral ischemia injury by inhibition of the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB)-mediated inflammatory responses. Overwhelming evidence shows that toll-like receptors (TLRs) are the upstream regulators of NF-κB. On the basis of the similarity of the pathology caused by traumatic brain injury (TBI) and stroke, we speculated that STVNa may have a therapeutic effect against TBI through regulation of the TLRs/NF-κB signaling-mediated inflammatory response...
April 20, 2018: Neuroreport
https://www.readbyqxmd.com/read/29683322/furoxans-oxadiazole-4n-oxides-with-attenuated-reactivity-are-neuroprotective-cross-the-blood-brain-barrier-and-improve-passive-avoidance-memory
#6
Austin Horton, Kevin Nash, Ethel Tackie-Yarboi, Alexander Kostrevski, Adam Novak, Aparna Raghavan, Jatin Tulsulkar, Qasim Alhadidi, Nathan Wamer, Bryn Langenderfer, Kalee Royster, Maxwell Ducharme, Katelyn Hagood, Megan Post, Zahoor A Shah, Isaac T Schiefer
Nitric oxide (NO) mimetics and other agents capable of enhancing NO/cGMP signaling have demonstrated efficacy as potential therapies for Alzheimer's disease. A group of thiol-dependent NO mimetics known as furoxans may be designed to exhibit attenuated reactivity to provide slow onset NO effects. The present study describes the design, synthesis, and evaluation of a furoxan library resulting in the identification of a prototype furoxan, 5a, which was profiled for use in the CNS. 5a demonstrated negligible reactivity toward generic cellular thiols under physiological conditions...
April 23, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29682609/prolonged-cannabidiol-treatment-effects-on-hippocampal-subfield-volumes-in-current-cannabis-users
#7
Camilla Beale, Samantha J Broyd, Yann Chye, Chao Suo, Mark Schira, Peter Galettis, Jennifer H Martin, Murat Yücel, Nadia Solowij
Introduction: Chronic cannabis use is associated with neuroanatomical alterations in the hippocampus. While adverse impacts of cannabis use are generally attributed to Δ9 -tetrahydrocannabinol, emerging naturalistic evidence suggests cannabidiol (CBD) is neuroprotective and may ameliorate brain harms associated with cannabis use, including protection from hippocampal volume loss. This study examined whether prolonged administration of CBD to regular cannabis users within the community could reverse or reduce the characteristic hippocampal harms associated with chronic cannabis use...
2018: Cannabis and Cannabinoid Research
https://www.readbyqxmd.com/read/29682587/therapeutic-potential-of-pien-tze-huang-on-experimental-autoimmune-encephalomyelitis-rat
#8
Xuemei Qiu, Hui Luo, Xue Liu, Qingqing Guo, Kang Zheng, Danping Fan, Jiawen Shen, Cheng Lu, Xiaojuan He, Ge Zhang, Aiping Lu
Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system (CNS). There is still lack of commercially viable treatment currently. Pien Tze Huang (PZH), a traditional Chinese medicine, has been proved to have anti-inflammatory, neuroprotective, and immunoregulatory effects. This study investigated the possible therapeutic effects of PZH on experimental autoimmune encephalomyelitis (EAE) rats, a classic animal model of MS. Male Lewis rats were immunized with myelin basic protein (MBP) peptide to establish an EAE model and then treated with three doses of PZH...
2018: Journal of Immunology Research
https://www.readbyqxmd.com/read/29682085/prostaglandin-e-2-produced-by-alginate-encapsulated-mesenchymal-stromal-cells-modulates-the-astrocyte-inflammatory-response
#9
Elizabeth C Stucky, Joshua Erndt-Marino, Rene S Schloss, Martin L Yarmush, David I Shreiber
Astroglia are well known for their role in propagating secondary injury following brain trauma. Modulation of this injury cascade, including inflammation, is essential to repair and recovery. Mesenchymal stromal cells (MSCs) have been demonstrated as trophic mediators in several models of secondary CNS injury, however, there has been varied success with the use of direct implantation due to a failure to persist at the injury site. To achieve sustained therapeutic benefit, we have encapsulated MSCs in alginate microspheres and evaluated the ability of these encapsulated MSCs to attenuate neuro-inflammation...
June 2017: Nano LIFE
https://www.readbyqxmd.com/read/29682007/possible-neuroprotective-role-of-p2x2-in-the-retina-of-diabetic-rats
#10
Jorge E Mancini, Gustavo Ortiz, Constanza Potilinstki, Juan P Salica, Emiliano S Lopez, J Oscar Croxatto, Juan E Gallo
Background: Purinergic receptors are expressed in different tissues including the retina. These receptors are involved in processes like cell growth, proliferation, activation and survival. ATP is the major activator of P2 receptors. In diabetes, there is a constant ATP production and this rise of ATP leads to a persistent activation of purinergic receptors. Antagonists of these receptors are used to evaluate their inhibition effects. Recently, the P2X2 has been reported to have a neuroprotective role...
2018: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/29681884/glutathione-s-transferase-alpha-4-prevents-dopamine-neurodegeneration-in-a-rat-alpha-synuclein-model-of-parkinson-s-disease
#11
Michael Jewett, Elna Dickson, Kajsa Brolin, Matilde Negrini, Itzia Jimenez-Ferrer, Maria Swanberg
Parkinson's disease (PD) is a common, progressive neurodegenerative disease, which typically presents itself with a range of motor symptoms, like resting tremor, bradykinesia, and rigidity, but also non-motor symptoms such as fatigue, constipation, and sleep disturbance. Neuropathologically, PD is characterized by loss of dopaminergic cells in the substantia nigra pars compacta (SNpc) and Lewy bodies, neuronal inclusions containing α-synuclein (α-syn). Mutations and copy number variations of SNCA , the gene encoding α-syn, are linked to familial PD and common SNCA gene variants are associated to idiopathic PD...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29681183/neonatal-hypoxic-ischemic-encephalopathy-emerging-therapeutic-strategies-based-on-pathophysiologic-phases-of-the-injury
#12
Qiuli Wang, Hongyan Lv, Lixin Lu, Pengshun Ren, Lianxiang Li
Neonatal hypoxic ischemic encephalopathy (HIE) is an important cause of neonatal death and disability. At present, there is no unified standard and specialized treatment method for neonatal HIE. In clinical practice, we have found that a gap remains between preclinical medical research and clinical application in treatment of neonatal HIE. To promote an organic combination of preclinical research and clinical application, we propose the different phases as intervention targets, based on the pathophysiologic changes in phases I, II, and III of neonatal HIE; moreover, we suggest transformative medicine as a principle that may improve the therapeutic effect by blocking the progression of the disease to an irreversible stage...
April 22, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29681009/effect-of-trigonella-foenum-graecum-linn-seeds-methanol-extract-on-learning-and-memory
#13
Tahira Assad, Rafeeq Alam Khan, Muhammad Ali Rajput
Prevention and delay in the onset of memory disorders will have a great impact on society by reducing the disease burden and finances. Drugs available for the treatment of learning and memory disorders are few. There is need to develop a better drug, several studies have shown the therapeutic effectiveness of herbal extracts for the learning and memory disorders because of their neuroprotective effects, hence herbs should be evaluated scientifically to form a basis for the future discovery of newer drugs. In this study, effect of Trigonella-foenum graecum L...
April 21, 2018: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29680709/parkinson-s-disease-like-burst-firing-activity-in-subthalamic-nucleus-induced-by-aav-%C3%AE-synuclein-is-normalized-by-lrrk2-modulation
#14
Michael Aagaard Andersen, Kenneth Vielsted Christensen, Lassina Badolo, Garrick Paul Smith, Ross Jeggo, Poul Henning Jensen, Kathrine Just Andersen, Florence Sotty
Parkinson's disease (PD) affects motor function through degenerative processes and synaptic transmission impairments in the basal ganglia. None of the treatments available delays or stops the progression of the disease. While α-synuclein pathological accumulation represents a hallmark of the disease in its idiopathic form, leucine rich repeat kinase 2 (LRRK2) is genetically associated with familial and sporadic forms of PD. The genetic information suggests that LRRK2 kinase activity plays a role in the pathogenesis of the disease...
April 19, 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29680708/sirt1-mediates-apelin-13-in-ameliorating-chronic-normobaric-hypoxia-induced-anxiety-like-behavior-by-suppressing-nf-%C3%AE%C2%BAb-pathway-in-mice-hippocampus
#15
Junming Fan, Hui Guang, Haizeng Zhang, Danyang Chen, Lu Ding, Xiaofang Fan, Feng Xue, Zhuohui Gan, Yongyu Wang, Sunzhong Mao, Lianggang Hu, Yongsheng Gong
We previously showed that apelin-13 ameliorates chronic normobaric hypoxia (CNH)-induced anxiety-like behavior in mice, the mechanism, however, is not well known. This study aims to investigate whether SIRT1 is involved in the anxiolytic effect of apelin-13 in CNH-treated mice, and to illustrate the potential underlying mechanism. We showed that apelin-13 treatment reversed a decrease of SIRT1 and an increase of acetylated p65 (lysine 310) proteins expression in hippocampus of CNH-treated mice, indicating that apelin-13 inhibited NF-κB signaling pathway by activating SIRT1...
April 19, 2018: Neuroscience
https://www.readbyqxmd.com/read/29680698/effectiveness-of-memantine-on-depression-like-behavior-memory-deficits-and-brain-mrna-levels-of-bdnf-and-trkb-in-rats-subjected-to-repeated-unpredictable-stress
#16
Meysam Amidfar, Yong-Ku Kim, Ove Wiborg
BACKGROUND: Previous clinical and preclinical studies have indicated that the N-methyl-d-aspartate (NMDA) receptor antagonist, memantine, has neuroprotective properties as well as antidepressant effects. The present study was designed to examine behavioral and molecular effects of memantine administration in rats subjected to the repeated unpredictable stress (RUS) paradigm. METHODS: Rats were split into four groups at random including control + saline, control + memantine, stressed + saline and stressed + memantine...
December 20, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29680240/peptide-derivatives-of-erythropoietin-in-the-treatment-of-neuroinflammation-and-neurodegeneration
#17
Ilkcan Ercan, Kemal Ugur Tufekci, Ezgi Karaca, Sermin Genc, Kursad Genc
During the past 35 years, recombinant DNA technology has allowed the production of a wide range of hematopoietic and neurotrophic growth factors including erythropoietin (EPO). These have emerged as promising protein drugs in various human diseases. Accumulated evidences have recently demonstrated the neuroprotective effect of EPO in preclinical models of acute and chronic degenerative disorders. Nevertheless, tissue protective effect of EPO could not be translated to the clinical trials because of common lethal thromboembolic events, erythropoiesis and hypertension...
2018: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/29679979/acute-dose-of-melatonin-via-nrf2-dependently-prevents-acute-ethanol-induced-neurotoxicity-in-the-developing-rodent-brain
#18
Tahir Ali, Shafiq Ur Rehman, Fawad Ali Shah, Myeong Ok Kim
BACKGROUND: Melatonin is a well-known potent endogenous antioxidant pharmacological agent with significant neuroprotective actions. Here in the current study, we explored the nuclear factor erythroid 2-related factor 2 (Nrf2) gene-dependent antioxidant mechanism underlying the neuroprotective effects of the acute melatonin against acute ethanol-induced elevated reactive oxygen species (ROS)-mediated neuroinflammation and neurodegeneration in the developing rodent brain. METHODS: In vivo rat pups were co-treated with a single dose of acute ethanol (5 g/kg, subcutaneous (S...
April 21, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29679909/mechanisms-of-the-active-components-from-korean-pine-nut-preventing-and-treating-d-galactose-induced-aging-rats
#19
Jianmei Zhang, Weiwei Lin, Ruijun Wu, Yanmeng Liu, Kai Zhu, Jinyu Ren, Sufang Zhang, Xiaomei Ling
Age-related neuronal injury and oxidative damage are the predominant factors for neurodegenerative diseases like Alzheimer's disease (AD). The aim of this study was to explore whether chronic administration of d-galactose (d-gal) can cause neuronal injury and oxidative damage, and to investigate the neuroprotective and antioxidative effects of the active components (UPNO-1) from Korean pine nut (Pinus koraiensis). Two dosing regimens were designed, one for the evaluation of preventive effects in which the rats were simultaneously administrated d-gal and UPNO-1/fishoil for 12 weeks, the other for the evaluation of therapeutic effects in which the rats were given d-gal for 8 weeks before treated with UPNO-1/selegiline for 8 weeks...
April 18, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29679699/amaryllidaceae-alkaloids-as-agents-with-protective-effects-against-oxidative-neural-cell-injury
#20
Natalie Cortes, Carol Castañeda, Edison H Osorio, Gloria Patricia Cardona-Gomez, Edison Osorio
AIMS: Determine a relationship between the neuroprotective activity and the antioxidant capacity of the Amaryllidaceae alkaloids in a model of Glu excitotoxicity in rat cortical neurons. MATERIALS AND METHODS: Was evaluated several alkaloidal fractions isolated from Amaryllidaceae species, a family known to contain neuroprotective alkaloids, in a model of Glu excitotoxicity in rat cortical neurons. In addition, several mechanisms of antioxidant activity were used, and a theoretical study of the antioxidants was performed...
April 18, 2018: Life Sciences
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