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neurotrophins

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https://www.readbyqxmd.com/read/29663315/pro-region-engineering-of-nerve-growth-factor-by-deep-mutational-scanning-enables-a-yeast-platform-for-conformational-epitope-mapping-of-anti-ngf-monoclonal-antibodies
#1
Angélica V Medina-Cucurella, Yaqi Zhu, Scott J Bowen, Lisa M Bergeron, Timothy A Whitehead
Nerve growth factor (NGF) plays a central role in multiple chronic pain conditions. As such, anti-NGF monoclonal antibodies (mAbs) that function by antagonizing NGF downstream signaling are leading drug candidates for non-opioid pain relief. To evaluate anti-canine NGF (cNGF) mAbs we sought a yeast surface display platform of cNGF. Both mature cNGF and pro-cNGF displayed on the yeast surface but bound conformationally sensitive mAbs at most 2.5-fold in mean fluorescence intensity above background, suggesting that cNGF was mostly misfolded...
April 16, 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29661832/kinase-activity-in-the-olfactory-bulb-is-required-for-odor-memory-consolidation
#2
Michelle T Tong, Tae-Young P Kim, Thomas A Cleland
Long-term fear memory formation in the hippocampus and neocortex depends upon brain-derived neurotrophic factor (BDNF) signaling after acquisition. Incremental, appetitive odor discrimination learning is thought to depend substantially on the differentiation of adult-born neurons within the olfactory bulb (OB)-a process that is closely associated with BDNF signaling. We sought to elucidate the role of neurotrophin signaling within the OB on odor memory consolidation. Male mice were trained on odor-reward associative discriminations after bilateral infusion of the kinase inhibitor K252a, or vehicle control, into the OB...
May 2018: Learning & Memory
https://www.readbyqxmd.com/read/29657092/the-critical-chemical-and-mechanical-regulation-of-folic-acid-on-neural-engineering
#3
Gloria B Kim, Yongjie Chen, Weibo Kang, Jinshan Guo, Russell Payne, Hui Li, Qiong Wei, Julianne Baker, Cheng Dong, Sulin Zhang, Pak Kin Wong, Elias B Rizk, Jiazhi Yan, Jian Yang
The mandate of folic acid supplementation in grained products has reduced the occurrence of neural tube defects by one third in the U.S since its introduction by the Food and Drug Administration in 1998. However, the advantages and possible mechanisms of action of using folic acid for peripheral nerve engineering and neurological diseases still remain largely elusive. Herein, folic acid is described as an inexpensive and multifunctional niche component that modulates behaviors in different cells in the nervous system...
April 3, 2018: Biomaterials
https://www.readbyqxmd.com/read/29656342/prosaposin-and-its-receptors-are-differentially-expressed-in-the-salivary-glands-of-male-and-female-rats
#4
Farzana Islam, Md Sakirul Islam Khan, Hiroaki Nabeka, Shouichiro Saito, Xuan Li, Tetsuya Shimokawa, Kimiko Yamamiya, Naoto Kobayashi, Seiji Matsuda
Salivary glands produce various neurotrophins that are thought to regulate salivary function during normal and pathological conditions. Prosaposin (PSAP) is a potent neurotrophin found in several tissues and various biological fluids and may play roles in the regulation of salivary function. However, little is known about PSAP in salivary glands. As the functions of salivary glands are diverse based on age and sex, this study examines whether PSAP and its receptors, G protein-coupled receptor 37 (GPR37) and GPR37L1, are expressed in the salivary glands of rats and whether sex and aging affect their expression...
April 14, 2018: Cell and Tissue Research
https://www.readbyqxmd.com/read/29655371/platelet-derived-growth-factor-predicts-prolonged-relapse-free-period-in-multiple-sclerosis
#5
Mario Stampanoni Bassi, Ennio Iezzi, Girolama A Marfia, Ilaria Simonelli, Alessandra Musella, Georgia Mandolesi, Diego Fresegna, Patrizio Pasqualetti, Roberto Furlan, Annamaria Finardi, Giorgia Mataluni, Doriana Landi, Luana Gilio, Diego Centonze, Fabio Buttari
BACKGROUND: In the early phases of relapsing-remitting multiple sclerosis (RR-MS), a clear correlation between brain lesion load and clinical disability is often lacking, originating the so-called clinico-radiological paradox. Different factors may contribute to such discrepancy. In particular, synaptic plasticity may reduce the clinical expression of brain damage producing enduring enhancement of synaptic strength largely dependent on neurotrophin-induced protein synthesis. Cytokines released by the immune cells during acute inflammation can alter synaptic transmission and plasticity possibly influencing the clinical course of MS...
April 14, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29651949/nerve-growth-factor-early-studies-and-recent-clinical-trials
#6
Maria Luisa Rocco, Marzia Soligo, Luigi Manni, Luigi Aloe
Since its discovery, nerve growth factor (NGF) has long occupied a critical role in developmental and adult neurobiology for its many important regulatory functions on the survival, growth and differentiation of nerve cells in the peripheral and central nervous system. NGF is the first discovered member of a family of neurotrophic factors, collectively indicated as neurotrophins, (which include brain-derived neurotrophic factor, neurotrophin-3 and neurotrophin 4/5). NGF was discovered for its action on the survival and differentiation of selected populations of peripheral neurons...
April 11, 2018: Current Neuropharmacology
https://www.readbyqxmd.com/read/29644656/pro-region-engineering-of-nerve-growth-factor-by-deep-mutational-scanning-enables-a-yeast-platform-for-conformational-epitope-mapping-of-anti-ngf-monoclonal-antibodies
#7
Angélica V Medina-Cucurella, Yaqi Zhu, Scott J Bowen, Lisa M Bergeron, Timothy A Whitehead
Nerve growth factor (NGF) plays a central role in multiple chronic pain conditions. As such, anti-NGF monoclonal antibodies (mAbs) that function by antagonizing NGF downstream signaling are leading drug candidates for non-opioid pain relief. To evaluate anti-canine NGF (cNGF) mAbs we sought a yeast surface display platform of cNGF. Both mature cNGF and pro-cNGF displayed on the yeast surface but bound conformationally sensitive mAbs at most 2.5-fold in mean fluorescence intensity above background, suggesting that cNGF was mostly misfolded...
April 12, 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29643634/tanezumab-therapy-targeting-nerve-growth-factor-in-pain-pathogenesis
#8
Mona K Patel, Alan D Kaye, Richard D Urman
In recent years, nerve growth factor (NGF) and the NGF receptor have become potential therapeutic targets in the treatment of acute and chronic pain states. NGF is a neurotrophin involved in regulating the function of sensory and sympathetic neurons during development. Numerous pain states have been linked to elevated levels of NGF and its role in increasing the perception of pain. Tanezumab, a recombinant humanized monoclonal antibody (IgG), was developed to target NGF, binding both circulating and local tissue NGF preventing interaction with the tropomyosin-related kinase-A and p75 receptors...
January 2018: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/29643001/immune-cell-bdnf-expression-in-treatment-na%C3%A3-ve-relapsing-remitting-multiple-sclerosis-patients-and-following-one-year-of-immunomodulation-therapy
#9
Alicja Kalinowska-Łyszczarz, Mikołaj A Pawlak, Aleksandra Wyciszkiewicz, Krystyna Osztynowicz, Wojciech Kozubski, Sławomir Michalak
Although neurons are the main source of neurotrophins in the healthy brain, neurotrophins can also be expressed in the immune system. We have previously shown that in relapsing-remitting multiple sclerosis (RRMS) lower immune-cell neurotrophin levels are associated with brain atrophy and cognitive impairment. The aim of the present study was to assess if immune-cell neurotrophin expression is impaired in MS as compared with the healthy controls, and to describe if these levels change in treatment-naïve RRMS patients, following one year of immunomodulation...
March 29, 2018: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/29625589/intramuscular-transplantation-of-bone-marrow-cells-prolongs-the-lifespan-of-sod1-g93a-mice-and-modulates-expression-of-prognosis-biomarkers-of-the-disease
#10
Amaya Rando, Diego Pastor, Mari Carmen Viso-León, Anna Martínez, Raquel Manzano, Xavier Navarro, Rosario Osta, Salvador Martínez
BACKGROUND: Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder characterized by progressive muscle weakness, paralysis and death. There is no effective treatment for ALS and stem cell therapy has arisen as a potential therapeutic approach. METHODS: SOD1 mutant mice were used to study the potential neurotrophic effect of bone marrow cells grafted into quadriceps femoris muscle. RESULTS: Bone marrow intramuscular transplants resulted in increased longevity with improved motor function and decreased motoneuron degeneration in the spinal cord...
April 6, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29625493/characterization-of-a-spontaneously-immortalized-murine-m%C3%A3-ller-glial-cell-line-qmmuc-1
#11
Josy Augustine, Sofia Pavlou, Michael O'Hare, Kevin Harkin, Alan Stitt, Tim Curtis, Heping Xu, Mei Chen
Purpose: Müller glia are critical for the survival of retinal neurons and the integrity of retinal blood vessels. Müller glial cultures are important tools for investigating Müller glial pathophysiology. Here, we report a spontaneously immortalized Müller glial cell line originally cultured and subsequently cloned from mouse pups. The cell line, Queen's University Murine Müller glia Clone-1 (QMMuC-1), has been cultured for over 60 passages, has morphologic features like primary Müller cell (PMC) cultures and remains stable...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29621637/exploiting-natural-polysaccharides-to-enhance-in-vitro-bio-constructs-of-primary-neurons-and-progenitor-cells
#12
Manuela Medelin, Davide Porrelli, Emily Rose Aurand, Denis Scaini, Andrea Travan, Massimiliano Antonio Borgogna, Michela Cok, Ivan Donati, Eleonora Marsich, Chiara Scopa, Raffaella Scardigli, Sergio Paoletti, Laura Ballerini
Current strategies in Central Nervous System (CNS) repair focus on the engineering of artificial scaffolds for guiding and promoting neuronal tissue regrowth. Ideally, one should combine such synthetic structures with stem cell therapies, encapsulating progenitor cells and instructing their differentiation and growth. We used developments in the design, synthesis, and characterization of polysaccharide-based bioactive polymeric materials for testing the ideal composite supporting neuronal network growth, synapse formation and stem cell differentiation into neurons and motor neurons...
April 2, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29621559/neurotrophins-and-cholinergic-enzyme-regulated-by-calpain-2-new-insights-into-neuronal-apoptosis-induced-by-polybrominated-diphenyl-ether-153
#13
Hongmei Zhang, Xiaorong Yang, Huajun Zhang, Xin Li, Zhihong Zhang, Lifang Hou, Zemin Wang, Qiao Niu, Tong Wang
Polybrominated diphenyl ether-153 (BDE-153) has been demonstrated to induce neuronal apoptosis in rat cerebral cortex and primary neurons. Neurotrophins and cholinergic enzymes play critical roles in the neuronal survival, maintenance, synaptic plasticity and learning memory, however, their roles in neuronal apoptosis following the BDE-153 treatment remain unclear. In this study, we firstly explored the possible predominant pathway underlying the neuronal apoptotic induced by the BDE-153 treatment in rat cerebral cortex, by measuring expression levels (protein and mRNA) of p53, caspase-3, 8, 9, calpain-1, and calpain-2, detected the expression levels (protein and mRNA) of neurotrophins including brain-derived neurotrophic factor (BDNF), glial-derived neurotrophic factor (GDNF), nerve growth factor (NGF), neurotrophin-3 (NT-3), and neurotrophin-4 (NT-4), and measured acetylcholinesterase (AchE) and choline acetyltransferase (ChaT) activities in rat cerebral cortex and primary neurons following BDE-153 treatment with or without pretreatment with inhibitors...
April 2, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29620059/erectile-dysfunction-neurotrophins-to-recover-erectile-function
#14
Clemens Thoma
No abstract text is available yet for this article.
April 5, 2018: Nature Reviews. Urology
https://www.readbyqxmd.com/read/29617282/inhibiting-trk-proteins-in-clinical-cancer-therapy
#15
REVIEW
Allison M Lange, Hui-Wen Lo
Gene rearrangements resulting in the aberrant activity of tyrosine kinases have been identified as drivers of oncogenesis in a variety of cancers. The tropomyosin receptor kinase (TRK) family of tyrosine receptor kinases is emerging as an important target for cancer therapeutics. The TRK family contains three members, TRKA, TRKB, and TRKC, and these proteins are encoded by the genes NTRK1, NTRK2, and NTRK3, respectively. To activate TRK receptors, neurotrophins bind to the extracellular region stimulating dimerization, phosphorylation, and activation of downstream signaling pathways...
April 4, 2018: Cancers
https://www.readbyqxmd.com/read/29609077/compromise-of-cortical-prongf-maturation-causes-selective-retrograde-atrophy-in-cholinergic-nucleus-basalis-neurons
#16
Simon Allard, Marie L Jacobs, Sonia Do Carmo, A Claudio Cuello
The degeneration of basal forebrain cholinergic neurons (BFCNs) in Alzheimer's disease (AD) contributes to cognitive impairment. Nerve growth factor (NGF) secreted in the cerebral cortex is necessary for the phenotypic maintenance of BFCNs. AD is associated with disturbances in NGF metabolism, leading to reduced mature NGF levels and to an accumulation of its precursor, proNGF. We previously described that, in rats, this neurotrophic imbalance is sufficient to induce a loss of cortical cholinergic synapses...
March 9, 2018: Neurobiology of Aging
https://www.readbyqxmd.com/read/29604364/the-p75-neurotrophin-receptor-might-mediate-sepsis-induced-synaptic-and-cognitive-impairments
#17
Muhuo Ji, Hong-Mei Yuan, Shan-Wu Feng, Jiangyan Xia, Jianjun Yang
Systemic inflammation induces cognitive impairment, yet the mechanism involved in this process is unclear. Neurotrophin receptor p75 (p75NTR ) signaling is a key pathological factor contributing to neurobehavioral abnormalities in many neurodegenerative diseases. However, the role of p75NTR signaling in the regulation of sepsis-induced cognitive impairment remains largely to be elucidated. In this study, systemic inflammation was induced by cecal ligation and puncture (CLP). Neurobehavioral performances were evaluated by open field, novel object recognition, and fear conditioning tests...
March 28, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29601811/perineural-invasion-in-human-cutaneous-squamous-cell-carcinoma-is-linked-to-neurotrophins-epithelial-mesenchymal-transition-and-ncam1
#18
C Brugière, M El Bouchtaoui, C Leboeuf, G Gapihan, R Ait El Far, M Sy, A L Lepage, P Ratajczak, A Janin, L Verneuil
No abstract text is available yet for this article.
March 27, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29600349/delivery-of-brain-derived-neurotrophic-factor-by-3d-biocompatible-polymeric-scaffolds-for-neural-tissue-engineering-and-neuronal-regeneration
#19
T Limongi, A Rocchi, F Cesca, H Tan, E Miele, A Giugni, M Orlando, M Perrone Donnorso, G Perozziello, Fabio Benfenati, Enzo Di Fabrizio
Biopolymers are increasingly employed for neuroscience applications as scaffolds to drive and promote neural regrowth, thanks to their ability to mediate the upload and subsequent release of active molecules and drugs. Synthetic degradable polymers are characterized by different responses ranging from tunable distension or shrinkage to total dissolution, depending on the function they are designed for. In this paper we present a biocompatible microfabricated poly-ε-caprolactone (PCL) scaffold for primary neuron growth and maturation that has been optimized for the in vitro controlled release of brain-derived neurotrophic factor (BDNF)...
March 29, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29596897/mechanisms-of-neurotrophin-trafficking-via-trk-receptors
#20
REVIEW
Emily Scott-Solomon, Rejji Kuruvilla
In neurons, long-distance communication between axon terminals and cell bodies is a critical determinant in establishing and maintaining neural circuits. Neurotrophins are soluble factors secreted by post-synaptic target tissues that retrogradely control axon and dendrite growth, survival, and synaptogenesis of innervating neurons. Neurotrophins bind Trk receptor tyrosine kinases in axon terminals to promote endocytosis of ligand-bound phosphorylated receptors into signaling endosomes. Trk-harboring endosomes function locally in axons to acutely promote growth events, and can also be retrogradely transported long-distances to remote cell bodies and dendrites to stimulate cytoplasmic and transcriptional signaling necessary for neuron survival, morphogenesis, and maturation...
March 26, 2018: Molecular and Cellular Neurosciences
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