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https://www.readbyqxmd.com/read/28108322/effect-of-zbd-2-on-chronic-pain-depressive-like-behaviors-and-recovery-of-motor-function-following-spinal-cord-injury-in-mice
#1
Xiao-Ming Li, Jia Meng, Lin Tao Li, Ting Guo, Liu-Kun Yang, Qi-Xin Shi, Xu-Bo Li, Yong Chen, Qi Yang, Jian-Ning Zhao
In addition to debilitating sensory and motor deficits, patients with spinal cord injury (SCI) may experience chronic hyperpathic pain (SCI-pain). Recent studies have revealed that translocator protein (TSPO) is involved in repairing neural cells as well as reducing anxiety and depression. However, the role of TSPO in SCI-pain and pain-induced depression remains unknown. The present study aimed to determine the effects of a new TSPO ligand, ZBD-2, on SCI-pain and consequent pain-induced depressive-like behaviors in mice...
January 17, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28096485/murine-cytomegalovirus-deubiquitinase-regulates-viral-chemokine-levels-to-control-inflammation-and-pathogenesis
#2
Adam T Hilterbrand, Daniel R Boutz, Edward M Marcotte, Jason W Upton
: Maintaining control over inflammatory processes represents a paradox for viral pathogens. Although many viruses induce host inflammatory responses to facilitate infection, control is necessary to avoid overactivation. One way is through the manipulation of proinflammatory chemokine levels, both host and viral. Murine cytomegalovirus (MCMV), a model betaherpesvirus, encodes a viral C-C chemokine, MCK2, which promotes host inflammatory responses and incorporates into virions to facilitate viral dissemination...
January 17, 2017: MBio
https://www.readbyqxmd.com/read/28092413/disruption-of-right-posterior-parietal-cortex-by-ctbs-alters-the-control-of-body-balance-in-quiet-stance
#3
David Kaulmann, Joachim Hermsdörfer, Leif Johannsen
Control of body balance relies on the integration of multiple sensory modalities. Lightly touching an earth-fixed reference augments the control of body sway. We aimed to advance the understanding of cortical integration of an afferent signal from light fingertip contact (LT) for the stabilisation of standing body balance. Assuming that right-hemisphere Posterior Parietal Cortex (rPPC) is involved in the integration and processing of touch for postural control, we expected that disrupting rPPC would attenuate any effects of light touch...
January 16, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28091556/vegf-b-promotes-recovery-of-corneal-innervations-and-trophic-functions-in-diabetic-mice
#4
Guohu Di, Xiaowen Zhao, Xia Qi, Songmei Zhang, Lu Feng, Weiyun Shi, Qingjun Zhou
Vascular endothelial growth factor (VEGF)-B possesses the capacity of promoting injured peripheral nerve regeneration and restore their sensory and trophic functions. However, the contribution and mechanism of VEGF-B in diabetic peripheral neuropathy remains unclear. In the present study, we investigated the expression and role of VEGF-B in diabetic corneal neuropathy by using type 1 diabetic mice and cultured trigeminal ganglion (TG) neurons. Hyperglycemia attenuated the endogenous expression of VEGF-B in regenerated diabetic corneal epithelium, but not that of VEGF receptors in diabetic TG neurons and axons...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28089665/dissociation-of-morphine-analgesic-effects-in-the-sensory-and-affective-components-of-formalin-induced-spontaneous-pain-in-male-and-female-rats
#5
Lisa R Harton, Janell R Richardson, Alexander Armendariz, Arbi Nazarian
Sex differences in the analgesic effects of morphine have been previously reported in various models that represent the sensory component of pain. However, pain sensation is a complex process that consists of both sensory and affective components. It is presently unclear whether the analgesic effects of morphine between the sensory and affective components of pain are sexually dimorphic. Moreover, differences in morphine dose-response in the two components of pain have not been examined in male and female rats...
January 12, 2017: Brain Research
https://www.readbyqxmd.com/read/28079757/pathogenesis-of-abdominal-pain-in-bowel-obstruction-role-of-mechanical-stress-induced-upregulation-of-nerve-growth-factor-in-gut-smooth-muscle-cells
#6
You-Min Lin, Yu Fu, John Winston, Ravi Radhakrishnan, Sushil K Sarna, Li-Yen M Huang, Xuan-Zheng Shi
Abdominal pain is one of the major symptoms in bowel obstruction (BO); its cellular mechanisms remain incompletely understood. We tested the hypothesis that mechanical stress in obstruction upregulates expression of nociception mediator nerve growth factor (NGF) in gut smooth muscle cells (SMC), and NGF sensitizes primary sensory nerve to contribute to pain in BO. Partial colon obstruction was induced with a silicon band implanted in the distal bowel of Sprague-Dawley rats. Colon-projecting sensory neurons in the dorsal root ganglia (DRG, T13 to L2) were identified for patch clamp and gene expression studies...
January 6, 2017: Pain
https://www.readbyqxmd.com/read/28079163/steady-state-and-dynamic-network-modes-for-perceptual-expectation
#7
Uk-Su Choi, Yul-Wan Sung, Seiji Ogawa
Perceptual expectation can attenuate repetition suppression, the stimulus-induced neuronal response generated by repeated stimulation, suggesting that repetition suppression is a top-down modulatory phenomenon. However, it is still unclear which high-level brain areas are involved and how they interact with low-level brain areas. Further, the temporal range over which perceptual expectation can effectively attenuate repetition suppression effects remains unclear. To elucidate the details of this top-down modulatory process, we used two short and long inter-stimulus intervals for a perceptual expectation paradigm of paired stimulation...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28079157/feeling-touched-emotional-modulation-of-somatosensory-potentials-to-interpersonal-touch
#8
N Ravaja, V Harjunen, I Ahmed, G Jacucci, M M Spapé
Although the previous studies have shown that an emotional context may alter touch processing, it is not clear how visual contextual information modulates the sensory signals, and at what levels does this modulation take place. Therefore, we investigated how a toucher's emotional expressions (anger, happiness, fear, and sadness) modulate touchee's somatosensory-evoked potentials (SEPs) in different temporal ranges. Participants were presented with tactile stimulation appearing to originate from expressive characters in virtual reality...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28077721/temporal-expectations-guide-dynamic-prioritization-in-visual-working-memory-through-attenuated-%C3%AE-oscillations
#9
Freek van Ede, Marcel Niklaus, Anna C Nobre
: Although working memory is generally considered a highly dynamic mnemonic store, popular laboratory tasks used to understand its psychological and neural mechanisms (such as change detection and continuous reproduction) often remain relatively "static," involving the retention of a set number of items throughout a shared delay interval. In the current study, we investigated visual working memory in a more dynamic setting, and assessed the following: (1) whether internally guided temporal expectations can dynamically and reversibly prioritize individual mnemonic items at specific times at which they are deemed most relevant; and (2) the neural substrates that support such dynamic prioritization...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28056109/postural-ataxia-in-cerebellar-downbeat-nystagmus-its-relation-to-visual-proprioceptive-and-vestibular-signals-and-cerebellar-atrophy
#10
Christoph Helmchen, Jan-Birger Kirchhoff, Martin Göttlich, Andreas Sprenger
BACKGROUND: The cerebellum integrates proprioceptive, vestibular and visual signals for postural control. Cerebellar patients with downbeat nystagmus (DBN) complain of unsteadiness of stance and gait as well as blurred vision and oscillopsia. OBJECTIVES: The aim of this study was to elucidate the differential role of visual input, gaze eccentricity, vestibular and proprioceptive input on the postural stability in a large cohort of cerebellar patients with DBN, in comparison to healthy age-matched control subjects...
2017: PloS One
https://www.readbyqxmd.com/read/28039782/reduced-sensitivity-to-social-priors-during-action-prediction-in-adults-with-autism-spectrum-disorders
#11
Valerian Chambon, Chlöé Farrer, Elisabeth Pacherie, Pierre O Jacquet, Marion Leboyer, Tiziana Zalla
An extensive amount of evidence has documented a diminished ability to predict and understand other people's action in individuals with autism spectrum disorders (ASD). Recently, two theoretical accounts, the "Hypo-priors" and the "Aberrant precision" hypotheses, have suggested that attenuated Bayesian priors or an imbalance of the precision ascribed to sensory evidence relative to prior expectations may be responsible for the atypical perceptual experience and difficulties with action understanding in ASD...
December 28, 2016: Cognition
https://www.readbyqxmd.com/read/28032561/expression-of-transient-receptor-potential-ankyrin-1-correlating-to-the-recovery-of-colonic-transit-after-pelvic-nerve-denervation-in-rats
#12
Weidong Tong, Yue Tian, Hanyong Yang, Li Wang, Song Zhao, Huiwen Shi, Feixiang Dai, Jingwang Ye
BACKGROUND: It has been reported that colorectal motility dysfunction due to pelvic nerve (PN) damage is restored overtime. However, the adaptive mechanism is unknown. Previous studies implied that transient receptor potential ankyrin 1 (TRPA1) mediated sensory nerve signal input plays a crucial role in gut motility regulation. The present study aimed to observe the colorectal motility restoration in rats after PN transection and to explore the change of TRPA1 protein expression in this adaptive process...
October 4, 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/28030474/therapeutic-benefits-of-the-methyl-donor-s-adenosylmethionine-sam-on-nerve-injury-induced-mechanical-hypersensitivity-and-cognitive-impairment-in-mice
#13
Stéphanie Grégoire, Magali Millecamps, Lina Naso, Sonia Do Carmo, A Claudio Cuello, Moshe Szyf, Laura S Stone
Despite considerable advances in understanding mechanisms involved in chronic pain, effective treatment remains elusive. Co-morbid conditions including anxiety, depression and cognitive impairment further impact quality of life. Chronic pain is associated with reversible changes in brain anatomy and function and with long-term changes in gene expression. Epigenetic mechanisms, including DNA methylation, contribute to wide-spread and long-lasting reprogramming of gene expression. We previously reported decreases in global DNA methylation in the mouse frontal cortex six months following induction of neuropathic pain using the Spared Nerve Injury (SNI) model...
December 22, 2016: Pain
https://www.readbyqxmd.com/read/28025063/was-it-me-filling-the-interval-between-action-and-effects-increases-agency-but-not-sensory-attenuation
#14
Lisa Weller, Katharina A Schwarz, Wilfried Kunde, Roland Pfister
Sensory stimuli resulting from one's own actions are perceptually attenuated compared to identical but externally produced stimuli. This may enable the organism to discriminate between self-produced events and externally produced events, suggesting a strong link between sensory attenuation and a subjective sense of agency. To investigate this supposed link, we compared the influence of filled and unfilled action-effect delays on both, judgements of agency for self-produced sounds and attenuation of the event-related potential (ERP)...
December 23, 2016: Biological Psychology
https://www.readbyqxmd.com/read/28024908/hyp-17-a-novel-voltage-gated-sodium-channel-blocker-relieves-inflammatory-and-neuropathic-pain-in-rats
#15
Jee Youn Lee, Yoo Lim Kam, Jungae Oh, Dong Hyun Kim, Jin-Sung Choi, Hae Young Choi, Sungmin Han, Inchan Youn, Hea-Young Park Choo, Tae Young Yune
Clinical and experimental studies suggest that voltage-gated sodium channels (VGSCs) play a key role in the pathogenesis of neuropathic pain and that blocking agents against these channels can be potentially therapeutic. In the current study, we investigated whether a novel compound, (-)-2-Amino-1-(4-((4-chlorophenyl)(phenyl)methyl)piperazin-1-yl)-propan-1-one(HYP-17), binds to VGSCs and evaluated its inhibitory effect on Na(+) currents of the rat dorsal root ganglia (DRG) sensory neurons and its analgesic effect on inflammatory and neuropathic pain...
December 24, 2016: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28018178/associations-of-unilateral-whisker-and-olfactory-signals-induce-synapse-formation-and-memory-cell-recruitment-in-bilateral-barrel-cortices-cellular-mechanism-for-unilateral-training-toward-bilateral-memory
#16
Zilong Gao, Lei Chen, Ruicheng Fan, Wei Lu, Dangui Wang, Shan Cui, Li Huang, Shidi Zhao, Sudong Guan, Yan Zhu, Jin-Hui Wang
Somatosensory signals and operative skills learned by unilateral limbs can be retrieved bilaterally. In terms of cellular mechanism underlying this unilateral learning toward bilateral memory, we hypothesized that associative memory cells in bilateral cortices and synapse innervations between them were produced. In the examination of this hypothesis, we have observed that paired unilateral whisker and odor stimulations led to odorant-induced whisker motions in bilateral sides, which were attenuated by inhibiting the activity of barrel cortices...
2016: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28011952/role-of-sensory-afferent-nerves-lipid-peroxidation-and-antioxidative-enzymes-in-the-carbon-monoxide-induced-gastroprotection-against-stress-ulcerogenesis
#17
S Kwiecien, K Magierowska, M Magierowski, M Surmiak, M Hubalewska-Mazgaj, R Pajdo, Z Sliwowski, A Chmura, D Wojcik, T Brzozowski
Carbon monoxide (CO) is a physiological gaseous mediator recently implicated in the mechanism of gastric mucosal defense due to its vasodilatory and antioxidative properties. Small quantities of endogenous CO are produced during heme degradation by heme oxygenase (HO-1), however, the involvement of the capsaicin-sensitive afferent neurons releasing calcitonin gene related peptide (CGRP) and anti-oxidative factors and mechanisms in the CO-induced gastroprotection against stress ulcerogenesis has been little studied...
October 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28007572/methane-ameliorates-spinal-cord-ischemia-reperfusion-injury-in-rats-antioxidant-anti-inflammatory-and-anti-apoptotic-activity-mediated-by-nrf2-activation
#18
Liping Wang, Ying Yao, Rong He, Yan Meng, Na Li, Dan Zhang, Jiajun Xu, Ouyang Chen, Jin Cui, Jinjun Bian, Yan Zhang, Guozhong Chen, Xiaoming Deng
Methane is reported to have antioxidant, anti-inflammatory and anti-apoptotic properties. We investigated the potential neuroprotective effects of methane-rich saline (MS) on spinal cord ischemia-reperfusion injury and determined that its therapeutic benefits are associated with the activation of nuclear factor erythroid 2-related factor 2 (Nrf2). Rats received 9min of spinal cord ischemia induced by occlusion of the descending thoracic aorta plus systemic hypotension followed by a single MS treatment (10ml/kg, ip) and 72h reperfusion...
December 20, 2016: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/27999940/fhf2-isoforms-differentially-regulate-nav1-6-mediated-resurgent-sodium-currents-in-dorsal-root-ganglion-neurons
#19
Cindy Barbosa, Yucheng Xiao, Andrew J Johnson, Wenrui Xie, Judith A Strong, Jun-Ming Zhang, Theodore R Cummins
Nav1.6 and Nav1.6-mediated resurgent currents have been implicated in several pain pathologies. However, our knowledge of how fast resurgent currents are modulated in neurons is limited. Our study explored the potential regulation of Nav1.6-mediated resurgent currents by isoforms of fibroblast growth factor homologous factor 2 (FHF2) in an effort to address the gap in our knowledge. FHF2 isoforms colocalize with Nav1.6 in peripheral sensory neurons. Cell line studies suggest that these proteins differentially regulate inactivation...
December 20, 2016: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27997532/phosphatidylserine-ameliorates-neurodegenerative-symptoms-and-enhances-axonal-transport-in-a-mouse-model-of-familial-dysautonomia
#20
Shiran Naftelberg, Ziv Abramovitch, Shani Gluska, Sivan Yannai, Yuvraj Joshi, Maya Donyo, Keren Ben-Yaakov, Tal Gradus, Jonathan Zonszain, Chen Farhy, Ruth Ashery-Padan, Eran Perlson, Gil Ast
Familial Dysautonomia (FD) is a neurodegenerative disease in which aberrant tissue-specific splicing of IKBKAP exon 20 leads to reduction of IKAP protein levels in neuronal tissues. Here we generated a conditional knockout (CKO) mouse in which exon 20 of IKBKAP is deleted in the nervous system. The CKO FD mice exhibit developmental delays, sensory abnormalities, and less organized dorsal root ganglia (DRGs) with attenuated axons compared to wild-type mice. Furthermore, the CKO FD DRGs show elevated HDAC6 levels, reduced acetylated α-tubulin, unstable microtubules, and impairment of axonal retrograde transport of nerve growth factor (NGF)...
December 2016: PLoS Genetics
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