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https://www.readbyqxmd.com/read/28072885/functional-role-of-intracellular-calcium-receptor-inositol-1-4-5-trisphosphate-type-1-in-rat-hippocampus-after-neonatal-anoxia
#1
Juliane Midori Ikebara, Silvia Honda Takada, Débora Sterzeck Cardoso, Natália Myuki Moralles Dias, Beatriz Crossiol Vicente de Campos, Talitha Amanda Sanches Bretherick, Guilherme Shigueto Vilar Higa, Mariana Sacrini Ayres Ferraz, Alexandre Hiroaki Kihara
Anoxia is one of the most prevalent causes of neonatal morbidity and mortality, especially in preterm neonates, constituting an important public health problem due to permanent neurological sequelae observed in patients. Oxygen deprivation triggers a series of simultaneous cascades, culminating in cell death mainly located in more vulnerable metabolic brain regions, such as the hippocampus. In the process of cell death by oxygen deprivation, cytosolic calcium plays crucial roles. Intracellular inositol 1,4,5-trisphosphate receptors (IP3Rs) are important regulators of cytosolic calcium levels, although the role of these receptors in neonatal anoxia is completely unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28066149/neuroprotective-effect-of-lithium-after-pilocarpine-induced-status-epilepticus-in-mice
#2
Namgue Hong, Yun-Sik Choi, Seong Yun Kim, Hee Jung Kim
Status epilepticus is the most common serious neurological condition triggered by abnormal electrical activity, leading to severe and widespread cell loss in the brain. Lithium has been one of the main drugs used for the treatment of bipolar disorder for decades, and its anticonvulsant and neuroprotective properties have been described in several neurological disease models. However, the therapeutic mechanisms underlying lithium's actions remain poorly understood. The muscarinic receptor agonist pilocarpine is used to induce status epilepticus, which is followed by hippocampal damage...
January 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28038986/differential-effects-of-minocycline-on-microglial-activation-and-neurodegeneration-following-closed-head-injury-in-the-neonate-rat
#3
L A Hanlon, R Raghupathi, J W Huh
The role of microglia in the pathophysiology of injury to the developing brain has been extensively studied. In children under the age of 4 who have sustained a traumatic brain injury (TBI), markers of microglial/macrophage activation were increased in the cerebrospinal fluid and were associated with worse neurologic outcome. Minocycline is an antibiotic that decreases microglial/macrophage activation following hypoxic-ischemia in neonatal rodents and TBI in adult rodents thereby reducing neurodegeneration and behavioral deficits...
December 27, 2016: Experimental Neurology
https://www.readbyqxmd.com/read/27965534/inhibition-of-histone-deacetylase-3-hdac3-mediates-ischemic-preconditioning-and-protects-cortical-neurons-against-ischemia-in-rats
#4
Xiaoyu Yang, Qimei Wu, Lei Zhang, Linyin Feng
Brain ischemic preconditioning (PC) provides vital insights into the endogenous protection against stroke. Genomic and epigenetic responses to PC condition the brain into a state of ischemic tolerance. Notably, PC induces the elevation of histone acetylation, consistent with evidence that histone deacetylase (HDAC) inhibitors protect the brain from ischemic injury. However, less is known about the specific roles of HDACs in this process. HDAC3 has been implicated in several neurodegenerative conditions. Deletion of HDAC3 confers protection against neurotoxicity and neuronal injury...
2016: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/27932944/role-of-homocysteine-in-the-ischemic-stroke-and-development-of-ischemic-tolerance
#5
REVIEW
Ján Lehotský, Barbara Tothová, Maria Kovalská, Dušan Dobrota, Anna Beňová, Dagmar Kalenská, Peter Kaplán
Homocysteine (Hcy) is a toxic, sulfur-containing intermediate of methionine metabolism. Hyperhomocysteinemia (hHcy), as a consequence of impaired Hcy metabolism or defects in crucial co-factors that participate in its recycling, is assumed as an independent human stroke risk factor. Neural cells are sensitive to prolonged hHcy treatment, because Hcy cannot be metabolized either by the transsulfuration pathway or by the folate/vitamin B12 independent remethylation pathway. Its detrimental effect after ischemia-induced damage includes accumulation of reactive oxygen species (ROS) and posttranslational modifications of proteins via homocysteinylation and thiolation...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27901472/effects-of-low-and-high-deprenyl-dose-on-antioxidant-enzyme-activities-in-the-adult-rat-brain
#6
Maria Lalkovicova, Frantiska Horvathova, Igor Sulla, Jozef Mihalik, Viera Danielisova
We evaluated the effects of low dose deprenyl (LDD, 0.0025 mg/kg per day) and high dose deprenyl (HDD, 0.25 mg/kg per day) treatment of male Wistar rats for 30 days on the activities of SOD and CAT in the cortex, striatum, and hippocampus. Total SOD and MnSOD activities were increased with LDD (p <0.05) in the cortex (0.74 ± 0.03; 0.31 ± 0.02), striatum (0.75 ± 0.02; 0.27 ± 0.03) and CA1 region of the hippocampus (0.75 ± 0.02; 0.29 ± 0.03) compared to the control (0.53 ± 0.02; 0.15 ± 0.02), but reduced (p <0...
January 2017: General Physiology and Biophysics
https://www.readbyqxmd.com/read/27865203/minocycline-prevents-cerebral-malaria-confers-neuroprotection-and-increases-survivability-of-mice-during-plasmodium-berghei-anka-infection
#7
Thittayil Suresh Apoorv, Phanithi Prakash Babu
Cerebral malaria (CM) is a neurological complication arising due to Plasmodium falciparum or Plasmodium vivax infection. Minocycline, a semi-synthetic tetracycline, has been earlier reported to have a neuroprotective role in several neurodegenerative diseases. In this study, we investigated the effect of minocycline treatment on the survivability of mice during experimental cerebral malaria (ECM). The currently accepted mouse model, C57BL/6 mice infected with Plasmodium berghei ANKA, was used for the study...
November 16, 2016: Cytokine
https://www.readbyqxmd.com/read/27856824/all-trans-retinoic-acid-augments-the-histopathological-outcome-of-neuroinflammation-and-neurodegeneration-in-lupus-prone-mrl-lpr-mice
#8
Michelle H Theus, Joshua B Sparks, Xiaofeng Liao, Jingjing Ren, Xin M Luo
Recently, we demonstrated that treatment with all-trans-retinoic acid (tRA) induced a paradoxical effect on immune activation during the development of autoimmune lupus. Here, we further describe its negative effects on mediating neuroinflammation and neurodegeneration. Female MRL/lpr mice were orally administered tRA or VARA (retinol mixed with 10% tRA) from 6 to 14 weeks of age. Both treatments had a significant effect on brain weight, which correlated with histopathological evidence of focal astrogliosis, meningitis, and ventriculitis...
November 16, 2016: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/27855137/garcinol-upregulates-gabaa-and-gad65-expression-modulates-bdnf-trkb-pathway-to-reduce-seizures-in-pentylenetetrazole-ptz-induced-epilepsy
#9
Fang Hao, Li-Hua Jia, Xiao-Wan Li, Ying-Rui Zhang, Xue-Wu Liu
BACKGROUND Epilepsy is the most predominant neurological disorder characterized by recurrent seizures. Despite treatment with antiepileptic drugs, epilepsy still is a challenge to treat, due to the associated adverse effects of the drugs. Previous investigations have shown critical roles of BDNF-TrkB signalling and expression of glutamic acid decarboxylase 65 (GAD65) and GABAA in the brain during epilepsy. Thus, drugs that could modulate BDNF-TrkB signal and expression of GAD65 and GABAA could aid in therapy...
November 17, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27825902/neuroprotective-effects-of-clarithromycin-against-neuronal-damage-in-cerebral-ischemia-and-in-cultured-neuronal-cells-after-oxygen-glucose-deprivation
#10
Yasuo Katayama, Toshiki Inaba, Chikako Nito, Satoshi Suda, Masayuki Ueda
AIMS: Rats subjected to transient focal ischemia and cultured neuronal cells subjected to oxygen-glucose deprivation (OGD) were treated with clarithromycin (CAM) to evaluate the effects of CAM in protecting against neuronal damage. MAIN METHODS: Sprague-Dawley rats were subjected to middle cerebral artery occlusion (MCAO) for 90min and then reperfused. Each animal was given an oral dose clarithromycin (CAM, 100mg/kg) or vehicle alone just after the ischemia was commenced...
January 1, 2017: Life Sciences
https://www.readbyqxmd.com/read/27769789/protective-effect-of-resveratrol-against-nigrostriatal-pathway-injury-in-striatum-via-jnk-pathway
#11
Dan Li, Nan Liu, Liang Zhao, Lei Tong, Hitoshi Kawano, Hong-Jing Yan, Hong-Peng Li
Nigrostriatal pathway injury is one of the traumatic brain injury models that usually lead to neurological dysfunction or neuron necrosis. Resveratrol-induced benefits have recently been demonstrated in several models of neuronal degeneration diseases. However, the protective properties of resveratrol against neurodegeneration have not been explored definitely. Thus, we employ the nigrostriatal pathway injury model to mimic the insults on the brain. Resveratrol decreased the p-ERK expression and increased the p-JNK expression compared to the DMSO group, but not alter the p38 MAPK proteins around the lesion site by Western blot...
October 18, 2016: Brain Research
https://www.readbyqxmd.com/read/27763892/neuroinflammatory-response-to-experimental-stroke-is-inhibited-by-boldine
#12
Neila Maria R de Lima, Emerson de O Ferreira, Mara Yone S D Fernandes, Francisco Arnaldo V de Lima, Kelly Rose T Neves, Marta Regina S do Carmo, Geanne M de Andrade
Inflammation plays a pivotal role in the development of ischemic brain damage. Astrocyte activation promotes the production of several proinflammatory mediators, such as TNF-α and iNOS. Eventually, neuronal death occurs, leading to the development of motor and memory deficits in patients. Boldine is the main alkaloid in the leaves and bark of the Peumus boldus Molina, and has anti-inflammatory and antioxidant properties. The aim of this work was to investigate the neuroprotective effect of boldine on neuroinflammation and memory deficits induced by permanent middle cerebral artery occlusion (pMCAO) in mice...
October 19, 2016: Behavioural Pharmacology
https://www.readbyqxmd.com/read/27757991/cannabinoids-prevent-the-amyloid-%C3%AE-induced-activation-of-astroglial-hemichannels-a-neuroprotective-mechanism
#13
Rosario Gajardo-Gómez, Valeria C Labra, Carola J Maturana, Kenji F Shoji, Cristian A Santibañez, Juan C Sáez, Christian Giaume, Juan A Orellana
The mechanisms involved in Alzheimer's disease are not completely understood and how astrocytes and their gliotransmission contribute to this neurodegenerative disease remains to be fully elucidated. Previous studies have shown that amyloid-β peptide (Aβ) induces neuronal death by a mechanism that involves the excitotoxic release of ATP and glutamate associated to astroglial hemichannel opening. We have demonstrated that synthetic and endogenous cannabinoids (CBs) reduce the opening of astrocyte Cx43 hemichannels evoked by activated microglia or inflammatory mediators...
January 2017: Glia
https://www.readbyqxmd.com/read/27755955/rapamycin-protects-against-neuronal-death-and-improves-neurological-function-with-modulation-of-microglia-after-experimental-intracerebral-hemorrhage-in-rats
#14
D Li, F Liu, T Yang, T Jin, H Zhang, X Luo, M Wang
Intracerebral hemorrhage (ICH) results in a devastating brain disorder with high mortality and poor prognosis and effective therapeutic intervention for the disease remains a challenge at present. The present study investigated the neuroprotective effects of rapamycin on ICH-induced brain damage and the possible involvement of activated microglia. ICH was induced in rats by injection of type IV collagenase into striatum. Different dose of rapamycin was systemically administrated by intraperitoneal injection beginning at 1 h after ICH induction...
September 30, 2016: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/27737807/cognitive-assessment-of-pycnogenol-therapy-following-traumatic-brain-injury
#15
Stephen W Scheff, Kelly N Roberts
We have previously shown that pycnogenol (PYC) increases antioxidants, decreases oxidative stress, suppresses neuroinflammation and enhances synaptic plasticity following traumatic brain injury (TBI). Here, we investigate the effects of PYC on cognitive function following a controlled cortical impact (CCI). Adult Sprague-Dawley rats received a CCI injury followed by an intraperitoneal injection of PYC (50 or 100mg/kg). Seven days post trauma, subjects were evaluated in a Morris water maze (MWM) and evaluated for changes in lesion volume...
November 10, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27730512/anthocyanin-loaded-peg-gold-nanoparticles-enhanced-the-neuroprotection-of-anthocyanins-in-an-a%C3%AE-1-42-mouse-model-of-alzheimer-s-disease
#16
Tahir Ali, Min Ju Kim, Shafiq Ur Rehman, Ashfaq Ahmad, Myeong Ok Kim
Nanomedicine is an emerging research area. In this study, we investigated the neuroprotective efficacy of anthocyanin-loaded polyethylene glycol-gold nanoparticles (PEG-AuNPs) for enhancing the neuroprotective efficacy of anthocyanins in an amyloid beta (Aβ)1-42 mouse model of Alzheimer's disease. We observed that both anthocyanin-loaded PEG-AuNPs and anthocyanins treatment (12 μg/g/day for 14 days) ameliorated memory impairments in the Aβ1-42-injected mice. However, the anthocyanin-loaded PEG-AuNPs were more effective than free anthocyanins...
October 11, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27720798/blast-waves-from-detonated-military-explosive-reduce-glur1-and-synaptophysin-levels-in-hippocampal-slice-cultures
#17
Marquitta Smith, Thuvan Piehler, Richard Benjamin, Karen L Farizatto, Morgan C Pait, Michael F Almeida, Vladimir V Ghukasyan, Ben A Bahr
Explosives create shockwaves that cause blast-induced neurotrauma, one of the most common types of traumatic brain injury (TBI) linked to military service. Blast-induced TBIs are often associated with reduced cognitive and behavioral functions due to a variety of factors. To study the direct effects of military explosive blasts on brain tissue, we removed systemic factors by utilizing rat hippocampal slice cultures. The long-term slice cultures were briefly sealed air-tight in serum-free medium, lowered into a 37°C water-filled tank, and small 1...
October 5, 2016: Experimental Neurology
https://www.readbyqxmd.com/read/27696902/age-dependent-acute-interference-with-stem-and-progenitor-cell-proliferation-in-the-hippocampus-after-exposure-to-1800-mhz-electromagnetic-radiation
#18
Falin Xu, Qiongdan Bai, Kai Zhou, Li Ma, Jiajia Duan, Fangli Zhuang, Cuicui Xie, Wenli Li, Peng Zou, Changlian Zhu
To investigate the effects of exposure to an 1800 MHz electromagnetic field on cell death and cell proliferation in the developing brain, postnatal day 7 (P7) and P21 healthy Kunming mice were randomly assigned into the experimental and control groups. The experimental groups were exposed to an 1800 MHz electromagnetic field for 8 h daily for three consecutive days. The thymidine analog 5-bromo-2-deoxyuridine (BrdU) was injected intraperitoneally 1 h before each exposure session, and all animals were sacrificed 24 h after the last exposure...
2017: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/27687316/-effect-of-equipotent-doses-of-bupivacaine-and-ropivacaine-in-high-fat-diet-fed-neonatal-rodent-model
#19
Ying-Dong Lian, Zong-Xiang Chen, Kang-Ru Zhu, Shu-Yin Sun, Li-Ping Zhu
OBJECTIVES: The increase in the prevalence of obesity presents a significant health and economic problem. Obesity has been reported to be a major contributor to variety of chronic diseases. Childhood obesity has been rising over the past decades leading to various complications in health. Millions of infants and children undergo surgery every year on various health grounds. The present investigation was undertaken to evaluate the effect of spinal anesthesia of equipotent doses of ropivacaine and bupivacaine on over-weight neonatal rats...
September 26, 2016: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/27683877/intranasal-administration-of-interferon-beta-attenuates-neuronal-apoptosis-via-the-jak1-stat3-bcl-2-pathway-in-a-rat-model-of-neonatal-hypoxic-ischemic-encephalopathy
#20
Brandon J Dixon, Di Chen, Yang Zhang, Jerry Flores, Jay Malaguit, Derek Nowrangi, John H Zhang, Jiping Tang
Neonatal hypoxic-ischemic encephalopathy (HIE) is an injury that often leads to detrimental neurological deficits. Currently, there are no established therapies for HIE and it is critical to develop treatments that provide protection after HIE. The objective of this study was to investigate the ability of interferon beta (IFNβ) to provide neuroprotection and reduce apoptosis after HIE. Postnatal Day 10 rat pups were subjected to unilateral carotid artery ligation followed by 2.5 hr of exposure to hypoxia (8% O2)...
October 2016: ASN Neuro
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