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https://www.readbyqxmd.com/read/28315269/sigma-1-receptors-and-neurodegenerative-diseases-towards-a-hypothesis-of-sigma-1-receptors-as-amplifiers-of-neurodegeneration-and-neuroprotection
#1
Linda Nguyen, Brandon P Lucke-Wold, Shona Mookerjee, Nidhi Kaushal, Rae R Matsumoto
Sigma-1 receptors are molecular chaperones that may act as pathological mediators and targets for novel therapeutic applications in neurodegenerative diseases. Accumulating evidence indicates that sigma-1 ligands can either directly or indirectly modulate multiple neurodegenerative processes, including excitotoxicity, calcium dysregulation, mitochondrial and endoplasmic reticulum dysfunction, inflammation, and astrogliosis. In addition, sigma-1 ligands may act as disease-modifying agents in the treatment for central nervous system (CNS) diseases by promoting the activity of neurotrophic factors and neural plasticity...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28298306/il-1%C3%AE-induces-nf-%C3%AE%C2%BAb-and-upregulates-microrna-372-to-inhibit-spinal-cord-injury-recovery
#2
Wei Zhou, Tongzhou Yuan, Youshui Gao, Peipei Yin, Wei Liu, Chenhao Pan, Yingjie Liu, Xiaowei Yu
Excessive inflammation including IL-1β-initiated signaling is among the earlies reactions that can cause neuronal damage following spinal cord injury (SCI). It has been suggested that microRNAs may participate in stem cell repair to facilitate functional recovery after SCI. Here we showed that in cultured human neural stem cells (hNSC) IL-1β reduced the expressions of both KIF3B (kinesin family member 3B) and NOSIP (nitric oxide synthase interacting protein), two key modulators for restricting inflammation and promoting neuronal regeneration...
March 15, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28294240/pegylation-corannulene-enhances-response-of-stress-through-promoting-neurogenesis
#3
Xinyu Li, Dandan Sun, Xu Li, Dashuai Zhu, Zhenzhen Jia, Jiajia Jiao, Kai Wang, Deling Kong, Xin Zhao, Lin Xu, Qiang Zhao, Dongyan Chen, Xizeng Feng
Carbon nanomaterials have been used to treat neurodegenerative diseases and neural disorders due to their diverse molecular structures. Corannulene is a three-dimensional π-bowl carbon nanomaterial that is different from planar PAHs, fullerenes and carbon nanotubes, but little is known about its biological functions. Herein, corannulene was functionalized with mPEG-DESP to prepare PEGylation corannulene nanoparticles (PEGylation CoNps). The synthesized PEGylation CoNps shows enhanced solubility and reduced aggregation when compared corannulene...
March 15, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28292897/inhibition-of-atherogenesis-by-the-cop9-signalosome-subunit-5-in-vivo
#4
Yaw Asare, Miriam Ommer, Florence A Azombo, Setareh Alampour-Rajabi, Marieke Sternkopf, Maryam Sanati, Marion J Gijbels, Corinna Schmitz, Dzmitry Sinitski, Pathricia V Tilstam, Hongqi Lue, André Gessner, Denise Lange, Johannes A Schmid, Christian Weber, Martin Dichgans, Joachim Jankowski, Ruggero Pardi, Menno P J de Winther, Heidi Noels, Jürgen Bernhagen
Constitutive photomorphogenesis 9 (COP9) signalosome 5 (CSN5), an isopeptidase that removes neural precursor cell-expressed, developmentally down-regulated 8 (NEDD8) moieties from cullins (thus termed "deNEDDylase") and a subunit of the cullin-RING E3 ligase-regulating COP9 signalosome complex, attenuates proinflammatory NF-κB signaling. We previously showed that CSN5 is up-regulated in human atherosclerotic arteries. Here, we investigated the role of CSN5 in atherogenesis in vivo by using mice with myeloid-specific Csn5 deletion...
March 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28284836/exciting-and-not-so-exciting-roles-of-pannexins
#5
REVIEW
Eliana Scemes, Jana Velíšková
It is the current view that purinergic signaling regulates many physiological functions. Pannexin1 (Panx1), a member of the gap junction family of proteins is an ATP releasing channel that plays important physio-pathological roles in various tissues, including the CNS. Upon binding to purinergic receptors expressed in neural cells, ATP triggers cellular responses including increased cell proliferation, cell morphology changes, release of cytokines, and regulation of neuronal excitability via release of glutamate, GABA and ATP itself...
March 8, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28270361/morphological-and-immunohistochemical-comparison-of-intrapancreatic-nerves-between-chronic-pancreatitis-and-type-1-autoimmune-pancreatitis
#6
Kota Kato, Tsukasa Ikeura, Masato Yanagawa, Takashi Tomiyama, Toshiro Fukui, Kazushige Uchida, Makoto Takaoka, Akiyoshi Nishio, Yoshiko Uemura, Sohei Satoi, Hisao Yamada, Kazuichi Okazaki
OBJECTIVES: The abdominal pain associated with chronic pancreatitis (CP) may be related to the increased number and size of intrapancreatic nerves. On the other hand, patients with type 1 autoimmune pancreatitis (AIP) rarely suffer from the pain syndrome, and there are no previous studies concerning the histopathological findings of intrapancreatic nerves in patients with type 1 AIP. The current study is aimed at investigating the differences in the histopathological and immunohistochemical findings of intrapancreatic nerves in patients with CP and type 1 AIP...
February 20, 2017: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/28270247/gut-brain-actions-underlying-comorbid-anxiety-and-depression-associated-with-inflammatory-bowel-disease
#7
Áine Abautret-Daly, Elaine Dempsey, Adolfo Parra-Blanco, Carlos Medina, Andrew Harkin
Introduction Inflammatory bowel disease (IBD) is a chronic relapsing and remitting disorder characterised by inflammation of the gastrointestinal tract. There is a growing consensus that IBD is associated with anxiety- and depression-related symptoms. Psychological symptoms appear to be more prevalent during active disease states with no difference in prevalence between Crohn's disease and ulcerative colitis. Behavioural disturbances including anxiety- and depression-like symptoms have also been observed in animal models of IBD...
March 8, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/28250011/microglia-driven-regulation-of-oligodendrocyte-lineage-cells-myelination-and-remyelination
#8
REVIEW
Veronique E Miron
Microglia are the resident macrophages of the CNS and members of the innate immune system. As such, they serve important functions in surveillance for indicators of damage and subsequent initiation of an inflammatory response. Although often implicated in neural damage, recent studies have also suggested beneficial roles of activated microglia and inflammation in developmental and regenerative processes in the CNS. These include regulating events leading to the generation and regeneration of myelin, the insulation surrounding nerve fibers which is critical for nerve health and function...
March 1, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28240738/inflammation-induced-mirna-155-inhibits-self-renewal-of-neural-stem-cells-via-suppression-of-ccaat-enhancer-binding-protein-%C3%AE-c-ebp%C3%AE-expression
#9
Kayoko Obora, Yuta Onodera, Toshiyuki Takehara, John Frampton, Joe Hasei, Toshifumi Ozaki, Takeshi Teramura, Kanji Fukuda
Intracerebral inflammation resulting from injury or disease is implicated in disruption of neural regeneration and may lead to irreversible neuronal dysfunction. Analysis of inflammation-related microRNA profiles in various tissues, including the brain, has identified miR-155 among the most prominent miRNAs linked to inflammation. Here, we hypothesize that miR-155 mediates inflammation-induced suppression of neural stem cell (NSC) self-renewal. Using primary mouse NSCs and human NSCs derived from induced pluripotent stem (iPS) cells, we demonstrate that three important genes involved in NSC self-renewal (Msi1, Hes1 and Bmi1) are suppressed by miR-155...
February 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28236848/the-fibrinolytic-system-a-new-target-for-treatment-of-depression-with-psychedelics
#10
R D Idell, G Florova, A A Komissarov, S Shetty, R B S Girard, S Idell
Current understanding of the neurobiology of depression has grown over the past few years beyond the traditional monoamine theory of depression to include chronic stress, inflammation and disrupted synaptic plasticity. Tissue plasminogen activator (tPA) is a key factor that not only promotes fibrinolysis via the activation of plasminogen, but also contributes to regulation of synaptic plasticity and neurogenesis through plasmin-mediated activation of a probrain derived neurotrophic factor (BDNF) to mature BDNF...
March 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28228489/age-dependent-shift-in-macrophage-polarisation-causes-inflammation-mediated-degeneration-of-enteric-nervous-system
#11
Laren Becker, Linh Nguyen, Jaspreet Gill, Subhash Kulkarni, Pankaj Jay Pasricha, Aida Habtezion
OBJECTIVE: The enteric nervous system (ENS) undergoes neuronal loss and degenerative changes with age. The cause of this neurodegeneration is poorly understood. Muscularis macrophages residing in close proximity to enteric ganglia maintain neuromuscular function via direct crosstalk with enteric neurons and have been implicated in the pathogenesis of GI motility disorders like gastroparesis and postoperative ileus. The aim of this study was to assess whether ageing causes alterations in macrophage phenotype that contributes to age-related degeneration of the ENS...
February 21, 2017: Gut
https://www.readbyqxmd.com/read/28220786/intrauterine-zika-virus-infection-of-pregnant-immunocompetent-mice-models-transplacental-transmission-and-adverse-perinatal-outcomes
#12
Meghan S Vermillion, Jun Lei, Yahya Shabi, Victoria K Baxter, Nathan P Crilly, Michael McLane, Diane E Griffin, Andrew Pekosz, Sabra L Klein, Irina Burd
Zika virus (ZIKV) crosses the placenta and causes congenital disease. Here we develop an animal model utilizing direct ZIKV inoculation into the uterine wall of pregnant, immunocompetent mice to evaluate transplacental transmission. Intrauterine inoculation at embryonic day (E) 10, but not E14, with African, Asian or American strains of ZIKV reduces fetal viability and increases infection of placental and fetal tissues. ZIKV inoculation at E10 causes placental inflammation, placental dysfunction and reduces neonatal brain cortical thickness, which is associated with increased activation of microglia...
February 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28217093/mindfulness-training-for-healthy-aging-impact-on-attention-well-being-and-inflammation
#13
REVIEW
Stephanie Fountain-Zaragoza, Ruchika Shaurya Prakash
The growing interest in mindfulness interventions for use in aging samples has been met with promising evidence of cognitive, emotional, and physiological benefits. The purpose of this review is to provide an overview of the impact of mindfulness training on three areas of functioning in older adults: behavioral and neural correlates of attentional performance, psychological well-being, and systemic inflammation. We have previously proposed that mindfulness training is uniquely suited as a rehabilitative tool for conferring both cognitive and emotional benefits for older adults...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28216088/sex-differences-in-the-neuro-immune-consequences-of-stress-focus-on-depression-and-anxiety
#14
REVIEW
Mandakh Bekhbat, Gretchen N Neigh
Women appear to be more vulnerable to the depressogenic effects of inflammation than men. Chronic stress, one of the most pertinent risk factors of depression and anxiety, is known to induce behavioral and affective-like deficits via neuroimmune alterations including activation of the brain's immune cells, pro-inflammatory cytokine expression, and subsequent changes in neurotransmission and synaptic plasticity within stress-related neural circuitry. Despite well-established sexual dimorphisms in the stress response, immunity, and prevalence of stress-linked psychiatric illnesses, much of current research investigating the neuroimmune impact of stress remains exclusively focused on male subjects...
February 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28194443/sustained-inflammation-after-pericyte-depletion-induces-irreversible-blood-retina-barrier-breakdown
#15
Shuntaro Ogura, Kaori Kurata, Yuki Hattori, Hiroshi Takase, Toshina Ishiguro-Oonuma, Yoonha Hwang, Soyeon Ahn, Inwon Park, Wataru Ikeda, Sentaro Kusuhara, Yoko Fukushima, Hiromi Nara, Hideto Sakai, Takashi Fujiwara, Jun Matsushita, Masatsugu Ema, Masanori Hirashima, Takashi Minami, Masabumi Shibuya, Nobuyuki Takakura, Pilhan Kim, Takaki Miyata, Yuichiro Ogura, Akiyoshi Uemura
In the central nervous system, endothelial cells (ECs) and pericytes (PCs) of blood vessel walls cooperatively form a physical and chemical barrier to maintain neural homeostasis. However, in diabetic retinopathy (DR), the loss of PCs from vessel walls is assumed to cause breakdown of the blood-retina barrier (BRB) and subsequent vision-threatening vascular dysfunctions. Nonetheless, the lack of adequate DR animal models has precluded disease understanding and drug discovery. Here, by using an anti-PDGFRβ antibody, we show that transient inhibition of the PC recruitment to developing retinal vessels sustained EC-PC dissociations and BRB breakdown in adult mouse retinas, reproducing characteristic features of DR such as hyperpermeability, hypoperfusion, and neoangiogenesis...
February 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28188219/distinct-effects-of-mir-210-reduction-on-neurogenesis-increased-neuronal-survival-of-inflammation-but-reduced-proliferation-associated-with-mitochondrial-enhancement
#16
Ludmila A Voloboueva, Xiaoyun Sun, Lijun Xu, Yi-Bing Ouyang, Rona G Giffard
Neurogenesis is essential to brain development and plays a central role in the response to brain injury. Stroke and head trauma stimulate proliferation of endogenous neural stem cells (NSCs); however, the survival of young neurons is sharply reduced by postinjury inflammation. Cellular mitochondria are critical to successful neurogenesis and are a major target of inflammatory injury. Mitochondrial protection was shown to improve survival of young neurons. This study tested whether reducing cellular microRNA-210 (miR-210) would enhance mitochondrial function and improve survival of young murine neurons under inflammatory conditions...
March 15, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28183031/threat-related-amygdala-activity-is-associated-with-peripheral-crp-concentrations-in-men-but-not-women
#17
Johnna R Swartz, Aric A Prather, Ahmad R Hariri
Increased levels of peripheral inflammatory markers, including C-Reactive Protein (CRP), are associated with increased risk for depression, anxiety, and suicidality. The brain mechanisms that may underlie the association between peripheral inflammation and internalizing problems remain to be determined. The present study examines associations between peripheral CRP concentrations and threat-related amygdala activity, a neural biomarker of depression and anxiety risk, in a sample of 172 young adult undergraduate students...
January 25, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28181735/the-innervation-of-the-kidney-in-renal-injury-and-inflammation-a-cause-and-consequence-of-deranged-cardiovascular-control
#18
REVIEW
Mohammed H Abdulla, Edward J Johns
Extensive investigations have revealed that renal sympathetic nerves regulate renin secretion, tubular fluid reabsorption and renal haemodynamics which can impact on cardiovascular homoeostasis normally and in pathophysiological states. The significance of the renal afferent innervation and its role in determining the autonomic control of the cardiovascular system is uncertain. The transduction pathways at the renal afferent nerves have been shown to require pro-inflammatory mediators and TRPV1 channels. Reno-renal reflexes have been described, both inhibitory and excitatory, demonstrating that a neural link exists between kidneys and may determine the distribution of excretory and haemodynamic function between the two kidneys...
February 9, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28176047/gastrointestinal-physiology-and-function
#19
Beverley Greenwood-Van Meerveld, Anthony C Johnson, David Grundy
The gastrointestinal (GI) system is responsible for the digestion and absorption of ingested food and liquids. Due to the complexity of the GI tract and the substantial volume of material that could be covered under the scope of GI physiology, this chapter briefly reviews the overall function of the GI tract, and discusses the major factors affecting GI physiology and function, including the intestinal microbiota, chronic stress, inflammation, and aging with a focus on the neural regulation of the GI tract and an emphasis on basic brain-gut interactions that serve to modulate the GI tract...
February 8, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28170004/inflammation-and-the-neural-diathesis-stress-hypothesis-of-schizophrenia-a-reconceptualization
#20
REVIEW
O D Howes, R McCutcheon
An interaction between external stressors and intrinsic vulnerability is one of the longest standing pathoaetiological explanations for schizophrenia. However, novel lines of evidence from genetics, preclinical studies, epidemiology and imaging have shed new light on the mechanisms that may underlie this, implicating microglia as a key potential mediator. Microglia are the primary immune cells of the central nervous system. They have a central role in the inflammatory response, and are also involved in synaptic pruning and neuronal remodeling...
February 7, 2017: Translational Psychiatry
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