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Brain Research Bulletin

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https://www.readbyqxmd.com/read/28919433/the-p2x7-receptor-in-dorsal-root-ganglia-is-involved-in-hiv-gp120-associated-neuropathic-pain
#1
Bing Wu, Lichao Peng, Jinyan Xie, Lifang Zou, Qicheng Zhu, Huaide Jiang, Zhihua Yi, Shouyu Wang, Yun Xue, Yun Gao, Guilin Li, Shuangmei Liu, Chunping Zhang, Guodong Li, Shangdong Liang, Huangui Xiong
Human immunodeficiency virus (HIV)-associated neuropathic pain is common, and studies have shown that HIV envelope glycoprotein 120 (gp120) can directly stimulate primary sensory afferent neurons causing hyperalgesia. The P2X7 receptor in the dorsal root ganglia (DRG) is involved in pain transmission and is closely related to the inflammatory and immune response. In this study, we aimed to explore the role of the P2X7 receptor in gp120-induced neuropathic pain using a rat model specific for this type of pain...
September 14, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28916448/molecular-and-synaptic-mechanisms-regulating-drug-associated-memories-towards-a-bidirectional-treatment-strategy
#2
REVIEW
Matthew T Rich, Mary M Torregrossa
The successful treatment of substance use disorders is dependent on the establishment of a long-term abstinent state. Relapse can be suppressed by interfering with memories of drug use that are evoked by re-exposure to drug-associated contexts and cues. Two strategies for accomplishing this goal are either to prevent drug-memory reconsolidation or to induce the formation of a competing, extinction memory. However, clinical attempts to prolong abstinence by behavioral modification of drug-related memories have had limited success...
September 12, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28899796/once-is-too-much-early-development-of-the-opponent-process-in-taste-reactivity-behavior-is-associated-with-later-escalation-of-cocaine-self-administration-in-rats
#3
Elizabeth M Colechio, Danielle N Alexander, Caesar G Imperio, Kelsey Jackson, Patricia S Grigson
Evidence suggests that the addiction process may begin immediately in some vulnerable subjects. Specifically, some rats have been shown to exhibit aversive taste reactivity (gapes) following the intraoral delivery of a cocaine-predictive taste cue after as few as 1 to 2 taste-drug pairings. After only 3 to 4 trials, the number of gapes becomes a reliable predictor of later cocaine self-administration. Given that escalation of drug-taking behavior over time is recognized as a key feature of substance use disorder (SUD) and addiction, the present study examined the relationship between early aversion to the cocaine-predictive flavor cue and later escalation of cocaine self-administration in an extended-access paradigm...
September 9, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28899795/microrna-137-and-its-downstream-target-lsd1-inversely-regulate-anesthetics-induced-neurotoxicity-in-dorsal-root-ganglion-neurons
#4
Lingyang Chen, Xiaodan Wang, Wenguang Huang, Tingting Ying, Minjuan Chen, Jianbin Cao, Mingcang Wang
PURPOSE: Anesthetic reagents, such as bupivacaine (Bv), induce significant neurotoxicity in dorsal root ganglion neurons (DRGNs). In this study, we investigated the expression, function and cross-association of microRNA-137-3p (miR-137-3p) and lysine (K)-specific demethylase 1A (LSD1) in a murine model of Bv-induced neural injury in DRGNs. METHODS: Murine DRGNs were culture in vitro and treated with Bv. QPCR was used to evaluate miR-137-3p expression in Bv-injured DRGNs...
September 9, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28899794/female-rats-exhibit-less-avoidance-than-male-rats-of-a-cocaine-but-not-a-morphine-paired-saccharin-cue
#5
Christopher B Jenney, Jinju Dasalla, Patricia S Grigson
Rats avoid intake of an otherwise palatable taste cue when paired with drugs of abuse (Grigson and Twining, 2002). In male rats, avoidance of drug-paired taste cues is associated with conditioned blunting of dopamine in the nucleus accumbens (Grigson and Hajnal, 2007), conditioned elevation in circulating corticosterone (Gomez et al., 2000), and greater avoidance of the drug-paired cue predicts greater drug-taking (Grigson and Twining, 2002; Twining et al., 2009). While female rats generally are more responsive to drug than male rats, in this self-administration model, female rats consume more of a cocaine-paired saccharin cue and take less drug than males (Cason and Grigson, 2013)...
September 9, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28890284/activity-dependent-changes-in-transporter-and-potassium-currents-in-hippocampal-astrocytes
#6
REVIEW
Albina Lebedeva, Alex Plata, Olga Nosova, Olga Tyurikova, Alexey Semyanov
Astrocytes are involved in maintenance of synaptic microenvironment by glutamate uptake and K(+) clearance. These processes are associated with net charge transfer across the membrane and therefore can be recorded as glutamate transporter (IGluT) and K(+) (IK) currents. It has been previously shown that the blockade of IK with BaCl2 enhances the IGluT. Here we show that activity-dependent facilitation (5 stimuli at 50Hz) of IGluT was not significantly different in BaCl2 compared to facilitation of IGluT isolated by post-hoc subtraction of IK...
September 7, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28842304/establishment-of-a-rhesus-monkey-model-of-chronic-temporal-lobe-epilepsy-using-repetitive-unilateral-intra-amygdala-kainic-acid-injections
#7
Yajie Chi, Bolin Wu, Jianwei Guan, Kuntai Xiao, Ziming Lu, Xiao Li, Yuting Xu, Shan Xue, Qiang Xu, Junhua Rao, Yanwu Guo
OBJECTIVE: Temporal lobe epilepsy (TLE) is a common type of acquired epilepsy refractory to medical treatment. As such, establishing animal models of this disease is critical to developing new and effective treatment modalities. Because of their small head size, rodents are not suitable for comprehensive electroencephalography (EEG) evaluation via scalp or subdural electrodes. Therefore, a larger primate model that closely recapitulates signs of TLE is needed; here we describe a rhesus monkey model resembling chronic TLE...
September 6, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28867384/downregulations-of-trpm8-expression-and-membrane-trafficking-in-dorsal-root-ganglion-mediate-the-attenuation-of-cold-hyperalgesia-in-cci-rats-induced-by-gfr%C3%AE-3-knockdown
#8
Lin Su, Ruichen Shu, Chengcheng Song, Yonghao Yu, Guolin Wang, Yazhuo Li, Changxiao Liu
BACKGROUND: Cold hyperalgesia is an intractable sensory abnormality commonly seen in peripheral neuropathies. Although glial cell line-derived neurotrophic factor family receptor alpha3 (GFRα3) is required for the formation of pathological cold pain has been revealed, potential transduction mechanism is poorly elucidated. We have previously demonstrated the contribution of enhanced activity of transient receptor potential melastatin 8 (TRPM8) to cold hyperalgesia in neuropathic pain using a rat model of chronic constriction injury (CCI) to the sciatic nerve...
September 1, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28867383/protective-effects-of-kinetin-against-aluminum-chloride-and-d-galactose-induced-cognitive-impairment-and-oxidative-damage-in-mouse
#9
Yunpeng Wei, Dan Liu, Yin Zheng, Honglian Li, Chaoshuang Hao, Wuqing Ouyang
Increasing evidence indicates that aluminum exposure and oxidative stress play crucial roles in the initiation and development of Alzheimer's disease (AD). Aluminum chloride (AlCl3) and d-galactose (d-gal) combined treatment of mice is considered as an easy and cheap way to obtain an animal model of AD. Kinetin is a plant cytokinin, which is also reported to exert neuro-protective effects in vivo and in vitro. Thus, in this study, neuro-protective effects of kinetin were investigated in an AD model of mice induced by AlCl3 and d-gal...
September 1, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28866293/attenuation-of-pcreb-and-egr1-expression-in-the-insular-and-anterior-cingulate-cortices-associated-with-enhancement-of-cfa-evoked-mechanical-hypersensitivity-after-repeated-forced-swim-stress
#10
Hiroki Imbe, Akihisa Kimura
The perception and response to pain are severely impacted by exposure to stressors. In some animal models, stress increases pain sensitivity, which is termed stress-induced hyperalgesia (SIH). The insular cortex (IC) and anterior cingulate cortex (ACC), which are typically activated by noxious stimuli, affect pain perception through the descending pain modulatory system. In the present study, we examined the expression of phospho-cAMP response element-binding protein (pCREB) and early growth response 1 (Egr1) in the IC and ACC at 3h (the acute phase of peripheral tissue inflammation) after complete Freund's adjuvant (CFA) injection in naïve rats and rats preconditioned with forced swim stress (FS) to clarify the effect of FS, a stressor, on cortical cell activities in the rats showing SIH induced by FS...
September 1, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28843352/effects-of-rehabilitation-training-on-apoptosis-of-nerve-cells-and-the-recovery-of-neural-and-motor-functions-in-rats-with-ischemic-stroke-through-the-pi3k-akt-and-nrf2-are-signaling-pathways
#11
Xiao-Fei Jin, Shan Wang, Min Shen, Xin Wen, Xin-Rui Han, Jun-Chang Wu, Gao-Zhuo Tang, Dong-Mei Wu, Jun Lu, Yuan-Lin Zheng
This study was designed in order to investigate the effects between rehabilitation training on the apoptosis of nerve cells and the recovery of neural and motor functions of rats with ischemic stroke by way of the phosphatidylinositol 3-kinase/protein kinase B (PI3K/Akt) and nuclear factor E2-related factor 2/antioxidant responsive element (Nrf2/ARE) signaling pathways. In total, 110 healthy adult male Sprague-Dawley (SD) rats were selected in order to take part in this study. Ninety SD rats were used in order to establish the middle cerebral artery occlusion (MCAO), among which 80 rats were randomly assigned as part of the natural recovery, natural recovery+Rp-PI3K (the rats injected with PI3K/Akt inhibitor LY294002), rehabilitation training, and rehabilitation training+Rp-PI3K groups...
August 24, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28842306/berberine-attenuates-depressive-like-behaviors-by-suppressing-neuro-inflammation-in-stressed-mice
#12
Ya-Min Liu, Le Niu, Lin-Lin Wang, Li Bai, Xiao-Yan Fang, Yu-Cheng Li, Li-Tao Yi
Berberine, the major constituent alkaloid originally from the famous Chinese herb Huanglian (Coptis chinensis), has been shown to exert antidepressant-like effects in rodents. However, it is still not clear the involvement of neuro-inflammation suppression in the effects of berberine. The purpose of this study was to determine whether berberine affects the neuro-inflammation system in mice induced by chronic unpredictable mild stress (CUMS). Berberine was orally administrated in normal or CUMS mice for successive four weeks...
August 24, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28842305/antidepressant-like-effects-of-ginsenoside-rg2-in-a-chronic-mild-stress-model-of-depression
#13
Ying Ren, Jin-Liang Wang, Xiang Zhang, Hao Wang, Ying Ye, Lu Song, Ying-Jie Wang, Meng-Jue Tu, Wei-Wei Wang, Lan Yang, Bo Jiang
Major depression is a common neuropsychiatric disease with high lifetime prevalence and high incidence of suicide. This study aimed to evaluate the antidepressant effects of ginsenoside Rg2 in mice, and the possible mechanism was also determined. A single injection of both Rg2 (10 and 20mg/kg) and fluoxetine (positive control, 20mg/kg) induced notable antidepressant-like effects in the forced swim test and tail suspension test without affecting the locomotor activity of mice, and the tests were done 30min after the injection...
August 24, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28842303/aspirin-resistance-are-associated-with-long-term-recurrent-stroke-events-after-ischaemic-stroke
#14
Ning Zhang, Zhenhua Wang, Lihong Zhou
OBJECTIVE: To investigate the prevalent of aspirin resistance (AR) in stroke and its association with recurrent stroke in 214 patients with ischemic stroke who were receiving aspirin before the stroke onset. METHODS: Two hundreds and fourteen acute stroke patients who previously received aspirin therapy (100mg/day for ≥7days) were enrolled. Whole blood samples were collected for platelet aggregation testing. The result is expressed in aspirin reaction units (ARU)...
August 24, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28804008/perk-as-a-hub-of-multiple-pathogenic-pathways-leading-to-memory-deficits-and-neurodegeneration-in-alzheimer-s-disease
#15
REVIEW
Masuo Ohno
Cell signaling in response to an array of diverse stress stimuli converges on the phosphorylation of eukaryotic initiation factor-2α (eIF2α). In the brain, eIF2α is a hub for controlling learning and memory function and for maintaining neuronal integrity in health and disease. Among four eIF2α kinases, PERK is emerging as a key regulator for memory impairments and neurodegeneration in Alzheimer's disease (AD). Genetic and pharmacological manipulations of PERK-eIF2α signaling have revealed that the overactivation of this pathway is not a mere consequence of the neurodegenerative process but play critical roles in AD pathogenesis and the occurrence of memory deficits...
August 10, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28802901/effect-of-vertical-sleeve-gastrectomy-on-alcohol-consumption-and-preferences-in-dietary-obese-rats-and-mice-a-plausible-role-for-altered-ghrelin-signaling
#16
Elise R Orellana, Catherine Jamis, Nelli Horvath, Andras Hajnal
Vertical sleeve gastrectomy (VSG) and Roux-en-Y gastric bypass (RYGB) are the most common surgical options for the treatment of obesity and metabolic disorder. Whereas RYGB may result in greater and more durable weight loss, recent clinical and pre-clinical studies in rats have raised concerns that RYGB surgery may increase risk for alcohol use disorder (AUD). In contrast, recent clinical reports suggest a lesser risk for AUD following VSG, although no preclinical studies have been done to confirm that. Therefore, the present study sought to determine the effects of VSG on ethanol intake and preferences in rodent models using protocols similar to those previously used in animal studies for RYGB...
August 9, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28802900/adolescent-chronic-variable-social-stress-influences-exploratory-behavior-and-nicotine-responses-in-male-but-not-female-balb-cj-mice
#17
M J Caruso, D E Reiss, J I Caulfield, J L Thomas, A N Baker, S A Cavigelli, H M Kamens
Anxiety disorders and nicotine use are significant contributors to global morbidity and mortality as independent and comorbid diseases. Early-life stress, potentially via stress-induced hypothalamic-pituitary-adrenal axis (HPA) dysregulation, can exacerbate both. However, little is known about the factors that predispose individuals to the development of both anxiety disorders and nicotine use. Here, we examined the relationship between anxiety-like behaviors and nicotine responses following adolescent stress...
August 9, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28802899/a-species-dependent-response-to-the-pro-epileptic-drug-pentylentetrazole-in-birds
#18
Faiq Amin, Asim H Dar, Khan Osama, Faezah Khan, Rida Mitha, Arsal Tharwani, Ghulam Haider, Prem Chand, Fazal M Arain
Epilepsy is common disorder that affects over 50 million people worldwide. Birds remain a promising yet largely under-explored model of epilepsy. This study reports the comparison of the response of two species of birds, Australian Parrots (APs) and Sparrows (SPs), to a pro-epileptic drug, Pentylenetetrazole (PTZ). PTZ injections caused myoclonic jerks (MCJs) and tonic clonic seizures (TCSs) in both species. The frequency of MCJs in APs was greater at the dose of 75mg/kg compared to both 50mg/kg and 25mg/kg while it was not significantly different in SPs...
August 9, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28802898/neurochemical-evidence-that-cocaine-and-amphetamine-regulated-transcript-cart-55-102-peptide-modulates-the-dopaminergic-reward-system-by-decreasing-the-dopamine-release-in-the-mouse-nucleus-accumbens
#19
Angelina Rakovska, Maria Baranyi, Katalin Windisch, Polina Petkova-Kirova, Hristo Gagov, Reni Kalfin
CART (Cocaine- and Amphetamine-Regulated Transcript) peptide is a neurotransmitter naturally occurring in the CNS and found mostly in nucleus accumbens, ventrotegmental area, ventral pallidum, amygdalae and striatum, brain regions associated with drug addiction. In the nucleus accumbens, known for its significant role in motivation, pleasure, reward and reinforcement learning, CART peptide inhibits cocaine and amphetamine-induced dopamine-mediated increases in locomotor activity and behavior, suggesting a CART peptide interaction with the dopaminergic system...
August 9, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28802897/the-different-effects-of-lithium-and-tamoxifen-on-memory-formation-and-the-levels-of-neurotrophic-factors-in-the-brain-of-male-and-female-rats
#20
Samira S Valvassori, Cenita P Borges, Roger B Varela, Daniela V Bavaresco, Guilherme Bianchini, Edemilson Mariot, Camila O Arent, Wilson R Resende, Josiane Budni, João Quevedo
Lithium (Li) is a mood-stabilizing drug used in the treatment of bipolar disorder (BD). Recently, preclinical studies have demonstrated the potential of tamoxifen (TMX) in the treatment of acute episodes of BD. However, the prolonged use of TMX for mood disorders treatment is controversial. In this study, we evaluated the effects of TMX or Li on cognitive behavior, as well as the levels of neurotrophic factors in the brain of male and female rats. Male and female Wistar rats received administrations of water (control group), TMX or Li via gavage for a period of 28days; the rats were then subjected to the open-field test (to evaluate spontaneous locomotion), and the novel object recognition and step-down inhibitory avoidance tests (to evaluate cognition)...
August 9, 2017: Brain Research Bulletin
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