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https://www.readbyqxmd.com/read/29793180/insulin-is-a-potential-antioxidant-for-diabetes-associated-cognitive-decline-via-regulating-nrf2-dependent-antioxidant-enzymes
#1
Ying Song, Wei Ding, Yun Bei, Yan Xiao, Hai-Da Tong, Li-Bo Wang, Li-Yao Ai
PURPOSE: To investigate the neuroprotective effects of insulin on diabetic encephalopathy and its mechanism. EXPERIMENTAL AND APPROACH: The diabetic model was established by injection of streptozotocin. Behavior examinations were conducted by the Morris water maze. Histopathological alterations were detected by HE staining. ROS, CAT levels and SOD activity were measured using a microplate reader. In vitro, the viability of wild type and knock-down PC12 cells was detected by MTT assay, the morphology of cells was monitored under a microscope...
May 21, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29793057/ellagic-acid-protects-from-myelin-associated-sphingolipid-loss-in-experimental-autoimmune-encephalomyelitis
#2
Rebeca Busto, Jorge Serna, Aránzazu Perianes-Cachero, Rocío Quintana-Portillo, David García-Seisdedos, Alberto Canfrán-Duque, Carlos L Paino, Milagros Lerma, María E Casado, Antonia Martín-Hidalgo, Eduardo Arilla-Ferreiro, Miguel A Lasunción, Óscar Pastor
Experimental autoimmune encephalomyelitis (EAE), the most common model for multiple sclerosis, is characterized by inflammatory cell infiltration into the central nervous system and demyelination. Previous studies have demonstrated that administration of some polyphenols may reduce the neurological alterations of EAE. In this work, we show that ellagic acid, a polyphenolic compound, is beneficial in EAE, most likely through stimulation of ceramide biosynthesis within the brain. EAE was induced in Lewis rats by injection of guinea-pig spinal cord tissue along with Freund's complete adjuvant containing Mycobacterium tuberculosis...
May 21, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29792955/fisetin-alleviates-oxidative-stress-after-traumatic-brain-injury-via-the-nrf2-are-pathway
#3
Li Zhang, Handong Wang, Yali Zhou, Yihao Zhu, Maoxin Fei
Fisetin, a natural flavonoid, has neuroprotection properties in many brain injury models. However, its role in traumatic brain injury (TBI) has not been fully explained. In the present study, we aimed to explore the neuroprotective effects of fisetin in a mouse model of TBI. We found that fisetin improved neurological function, reduced cerebral edema, attenuated brain lesion and ameliorated blood-brain barrier (BBB) disruption after TBI. Moreover, the up-regulation of malondialdehyde (MDA) and the activity of glutathione peroxidase (GPx) were reversed by fisetin treatment...
May 21, 2018: Neurochemistry International
https://www.readbyqxmd.com/read/29792933/role-of-neuronal-nitric-oxide-synthase-in-slowly-progressive-dopaminergic-neurodegeneration-in-the-zitter-rat
#4
Ayuka Ehara, Kazuhiko Nakadate, Hiroyuki Sugimoto, Kanji Yoshimoto, Shuichi Ueda
Neuronal nitric oxide synthase (nNOS) is involved in nigrostriatal dopaminergic (DA) neurodegeneration. However, little is known about the distribution patterns and functions of nNOS in slowly progressive DA neurodegeneration. Here we describe the spatiotemporal change in nNOS expression over the course of neurodegeneration and the effect of short- or long-term treatment with the nNOS inhibitor, 7-nitroindazole (7-NI), in zitter (zi/zi) rats. In the substantia nigra pars compacta (SNc), nNOS expression was significantly increased with progression of neurodegeneration...
May 21, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29792848/subthalamic-nucleus-deep-brain-stimulation-protects-neurons-by-activating-autophagy-via-pp2a-inactivation-in-a-rat-model-of-parkinson-s-disease
#5
Ting-Ting Du, Ying-Chuan Chen, Yong-Quan Lu, Fan-Gang Meng, Hui Yang, Jian-Guo Zhang
Deep brain stimulation (DBS) of the subthalamic nucleus (STN) is an effective therapeutic strategy for alleviating disability in patients with moderate to severe Parkinson's disease (PD). Preclinical studies have shown that stimulation of the rat STN can protect against nigral dopaminergic neuron loss. However, the underlying mechanism is unclear. To investigate the molecular basis of the neuroprotective effects of STN stimulation, a rat model of PD was established by unilaterally injecting 6-hydroxydopamine (6-OHDA) into the striatum...
May 21, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29791910/melatonin-attenuates-histopathological-changes-in-the-hippocampus-of-infantile-rats-with-kaolin-induced-hydrocephalus
#6
Mehmet Turgut, Meral Baka, Yiğit Uyanıkgil
OBJECTIVE/AIM: Hydrocephalus is defined as an incapacitating neurological disorder characterized by ventricular enlargement in children, but the effects of melatonin on this hydrocephalus have not yet been fully elucidated. In the present experiment, we attempted to investigate the effects of exogenous melatonin administration on hydrocephalus-induced hippocampal changes in infantile rats. METHODS: In this study, we randomly divided 45 Swiss albino rats aged 2 weeks into 3 groups: group I, the control group received a sham injection with needle insertion only; groups II and III were given kaolin injections before treatment - group II, the hydrocephalus group, was treated with an isotonic NaCl solution, and group III, the hydrocephalus plus melatonin group, was treated with 0...
May 23, 2018: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29791508/does-arterial-hypertension-influence-the-onset-of-huntington-s-disease
#7
Leire Valcárcel-Ocete, Asier Fullaondo, Gorka Alkorta-Aranburu, María García-Barcina, Raymund A C Roos, Lena E Hjermind, Carsten Saft, Marina Frontali, Ralf Reilmann, Hugh Rickards, Ana M Zubiaga, Ana Aguirre
Huntington's disease (HD) age of onset (AO) is mainly determined by the length of the CAG repeat expansion in the huntingtin gene. The remaining AO variability has been attributed to other little-known factors. A factor that has been associated with other neurodegenerative diseases is arterial hypertension (AHT). The aim of this study is to evaluate the contribution of AHT to the AO of HD. We used data from a cohort of 630 European HD patients with adult onset collected by the REGISTRY project of the European Huntington's Disease Network...
2018: PloS One
https://www.readbyqxmd.com/read/29791485/alterations-in-the-brain-interactome-of-the-intrinsically-disordered-n-terminal-domain-of-the-cellular-prion-protein-prpc-in-alzheimer-s-disease
#8
Sarah Ulbrich, Petra Janning, Ralf Seidel, Jakob Matschke, Anika Gonsberg, Sebastian Jung, Markus Glatzel, Martin Engelhard, Konstanze F Winklhofer, Jörg Tatzelt
The cellular prion protein (PrPC) is implicated in neuroprotective signaling and neurotoxic pathways in both prion diseases and Alzheimer's disease (AD). Specifically, the intrinsically disordered N-terminal domain (N-PrP) has been shown to interact with neurotoxic ligands, such as Aβ and Scrapie prion protein (PrPSc), and to be crucial for the neuroprotective activity of PrPC. To gain further insight into cellular pathways tied to PrP, we analyzed the brain interactome of N-PrP. As a novel approach employing recombinantly expressed PrP and intein-mediated protein ligation, we used N-PrP covalently coupled to beads as a bait for affinity purification...
2018: PloS One
https://www.readbyqxmd.com/read/29790836/minocycline-promotes-post-hemorrhagic-neurogenesis-via-m2-microglia-polarization-via-up-regulation-of-the-trkb-bdnf-pathway-in-rats
#9
Miao Hongsheng, Runming Li, Cong Han, Xiuzhen Lu, Hang Zhang
Intracerebral hemorrhage (ICH) is a devastating disease worldwide with increasing mortality. The present study investigated whether minocycline was neuroprotective and induced M2 microglial polarization via up-regulation of the TrkB/BDNF pathway after ICH. ICH was induced via injection of autologous blood into 150 Sprague-Dawley (S-D) rats. A selective TrkB antagonist (ANA 12) and agonist (HIOC) were used to investigate the mechanism of minocycline-induced neuroprotection. Minocycline improved ICH-induced neurological deficits and reduced M1 microglia marker protein (CD68, CD16) expression as well as M2 microglial polarization (CD206 and arginase 1 protein)...
May 23, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29790746/neuroprotective-compound-from-an-endophytic-fungus-colletotrichum-sp-js-0367
#10
Ji Hoon Song, Changyeol Lee, Dahae Lee, Soonok Kim, Sunghee Bang, Myoung-Sook Shin, Jun Lee, Ki Sung Kang, Sang Hee Shim
Colletotrichum sp. JS-0367 was isolated from Morus alba (mulberry), identified, and cultured on a large scale for chemical investigation. One new anthraquinone (1) and three known anthraquinones (2-4) were isolated and identified using spectroscopic methods including 1D/2D-NMR and HRESIMS. Although the neuroprotective effects of some anthraquinones have been reported, the biological activities of the four anthraquinones isolated in this study have not been reported. Therefore, the neuroprotective effects of these compounds were determined against murine hippocampal HT22 cell death induced by glutamate...
May 23, 2018: Journal of Natural Products
https://www.readbyqxmd.com/read/29790724/neuroprotection-in-traumatic-brain-injury
#11
Masoom Desai, Abhi Jain
PURPOSE: Traumatic brain injury has a high incidence worldwide and is associated with significant morbidity and mortality. Moreover, TBI has enduring implications in several domains and limits overall quality of life even in the survivors. Neuroprotective strategies are needed to limit morbidity and mortality associated with this disease process. Insight into the failure of these strategies is required to pursue future research successfully. BACKGROUND: Several different approaches involving pharmacological, surgical and usage of certain devices have been attempted in traumatic brain injury...
May 22, 2018: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/29790427/simulated-microgravity-culture-enhances-the-neuroprotective-effects-of-human-cranial-bone-derived-mesenchymal-stem-cells-in-traumatic-brain-injury
#12
Takashi Otsuka, Takeshi Imura, Kei Nakagawa, Looniva Shrestha, Shinya Takahashi, Yumi Kawahara, Taijiro Sueda, Kaoru Kurisu, Louis Yuge
Fundamental cures of central nervous system (CNS) diseases are rarely achieved due to the low regenerative ability of the CNS. Recently, cell-based therapy using mesenchymal stem cells (MSCs) has been explored as effective treatments for CNS diseases. Among the various tissue-derived MSCs, we have isolated human cranial bone-derived MSCs (cMSCs) in our laboratory. In addition, we have focused on simulated microgravity (MG) as a valuable culture environment of MSCs. However, the detailed mechanisms underlying functional recovery from the transplantation of MSCs cultured under MG conditions remain unclear...
May 23, 2018: Stem Cells and Development
https://www.readbyqxmd.com/read/29790425/hypoxic-preconditioning-reduces-propofol-induced-neuroapoptosis-via-regulation-of-bcl-2-and-bax-and-downregulation-of-activated-caspase-3-in-the-hippocampus-of-neonatal-rats
#13
Jing Lv, Yubing Liang, Youbing Tu, Jing Chen, Yubo Xie
OBJECTIVE:  Evidence has shown that propofol may cause widespread apoptotic neurodegeneration. Hypoxic preconditioning (HPC) was previously demonstrated to provide neuroprotection and brain recovery from either acute or chronic neurodegeneration in several cellular and animal models. Therefore, the present study was designed to investigate the protective effects of hypoxic preconditioning on apoptosis caused by propofol in neonatal rats. METHODS: Propofol (100 mg/kg) was given to 7-day-old (P7) Sprague Dawley pups...
May 23, 2018: Neurological Research
https://www.readbyqxmd.com/read/29790105/physostigmine-restores-impaired-autophagy-in-the-rat-hippocampus-after-surgery-stress-and-lps-treatment
#14
Clarissa von Haefen, Marco Sifringer, Stefanie Endesfelder, Alexander Kalb, Adrián González-López, Annalena Tegethoff, Nadine Paeschke, Claudia D Spies
Tissue damage and pathogen invasion during surgical trauma have been identified as contributing factors leading to neuroinflammation in the hippocampus, which can be protected by stimulation of the cholinergic anti-inflammatory pathway using the acetylcholinesterase inhibitor physostigmine. Macroautophagy, an intracellular degradation pathway used to recycle and eliminate damaged proteins and organelles by lysosomal digestion, seems to be important for cell survival under stress conditions. This study aimed to examine the role of autophagy in physostigmine-mediated hippocampal cell protection in a rat model of surgery stress...
May 22, 2018: Journal of Neuroimmune Pharmacology: the Official Journal of the Society on NeuroImmune Pharmacology
https://www.readbyqxmd.com/read/29790068/neuritin-attenuates-neuronal-apoptosis-mediated-by-endoplasmic-reticulum-stress-in-vitro
#15
Xiaokun Sun, Linzhi Dai, Hang Zhang, Xuejun He, Fandi Hou, Wengao He, Shijun Tang, Dong Zhao
Neuritin is an extracellular glycophosphatidylinositol-linked protein that promotes neuronal survival, differentiation, function, and repair, but the exact mechanism of this neuroprotective effect remains unclear. Meanwhile, endoplasmic reticulum stress (ERS) induced apoptosis is attracting increased attention. In this work, we hypothesized that neuritin inhibited ERS to protect cortical neurons. To check this hypothesis, we exposed primary cultured cortical neurons to oxygen and glucose deprivation (OGD) for 45 min followed by reperfusion (R) to activate ERS...
May 22, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29789578/sk-channel-activation-is-neuroprotective-in-conditions-of-enhanced-er-mitochondrial-coupling
#16
Birgit Honrath, Inge E Krabbendam, Carmen IJsebaart, Valentina Pegoretti, Nadia Bendridi, Jennifer Rieusset, Martina Schmidt, Carsten Culmsee, Amalia M Dolga
Alterations in the strength and interface area of contact sites between the endoplasmic reticulum (ER) and mitochondria contribute to calcium (Ca2+ ) dysregulation and neuronal cell death, and have been implicated in the pathology of several neurodegenerative diseases. Weakening this physical linkage may reduce Ca2+ uptake into mitochondria, while fortifying these organelle contact sites may promote mitochondrial Ca2+ overload and cell death. Small conductance Ca2+ -activated K+ (SK) channels regulate mitochondrial respiration, and their activation attenuates mitochondrial damage in paradigms of oxidative stress...
May 22, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29789575/tamoxifen-induced-knockdown-of-the-mitochondrial-calcium-uniporter-in-thy1-expressing-neurons-protects-mice-from-hypoxic-ischemic-brain-injury
#17
Matthew Nichols, Evgeny V Pavlov, George S Robertson
The mitochondrial calcium uniporter (MCU) mediates high-capacity mitochondrial calcium uptake that stimulates energy production. However, excessive MCU activity can cause ischemic heart injury. To examine if the MCU is also involved in hypoxic/ischemic (HI) brain injury, we have generated conditional MCU knockout mice by tamoxifen (TMX) administration to adult MCU-floxed (MCUfl/fl ) mice expressing a construct encoding Thy1-cre/ERT2-eYFP. Relative to TMX/Thy1-cre/ERT2-eYFP controls, HI-induced sensorimotor deficits, forebrain neuron loss and mitochondrial damage were decreased for conditional MCU knockout mice...
May 22, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29789506/design-and-efficacy-of-nanogels-formulations-for-intranasal-administration
#18
REVIEW
Blessing A Aderibigbe, Tobeka Naki
Nanogels are drug delivery systems that can bypass the blood-brain barrier and deliver drugs to the desired site when administered intranasally. They have been used as a drug delivery platform for the management of brain diseases such as Alzheimer disease, migraine, schizophrenia and depression. nanogels have also been developed as vaccine carriers for the protection of bacterial infections such as influenza, meningitis, pneumonia and as veterinary vaccine carriers for the protection of animals from encephalomyelitis and mouth to foot disease...
May 23, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29789205/genetic-variants-related-to-urate-and-risk-of-parkinson-s-disease
#19
Katherine C Hughes, Xiang Gao, Eilis J O'Reilly, Iris Y Kim, Molin Wang, Marc G Weisskopf, Michael A Schwarzschild, Alberto Ascherio
INTRODUCTION: Higher urate concentrations have been associated with a lower risk of developing Parkinson's disease (PD) and with slower rates of clinical decline in PD patients. Whether these associations reflect a neuroprotective effect of urate is unclear. Our objective was to assess whether genetic variants that modify circulating urate levels are also associated with altered PD risk. METHODS: Participants were from three large ongoing cohort studies: the Nurses' Health Study (NHS), the Health Professionals Follow-up Study (HPFS), and the Cancer Prevention Study II Nutrition Cohort (CPS-IIN)...
May 1, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29789153/adjunct-retrograde-cerebral-perfusion-provides-superior-outcomes-compared-with-hypothermic-circulatory-arrest-alone-a-meta-analysis
#20
David H Tian, Justin Weller, Shaheen Hasmat, Aung Oo, Paul Forrest, Hosen Kiat, Tristan D Yan
OBJECTIVE: Retrograde cerebral perfusion is becoming less frequently used as a method of neuroprotection during aortic surgery. The present meta-analysis aims to compare outcomes after arch surgery with hypothermic circulatory arrest versus hypothermic circulatory arrest + retrograde cerebral perfusion. METHODS: Electronic searches were performed using 7 databases from their inception to September 2016. Relevant comparative studies that included patient groups who underwent aortic arch surgery using hypothermic circulatory arrest with continuous retrograde cerebral perfusion or hypothermic circulatory arrest alone were identified, and data were extracted by 2 independent researchers...
April 21, 2018: Journal of Thoracic and Cardiovascular Surgery
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