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https://www.readbyqxmd.com/read/29097081/paraneoplastic-autoimmune-movement-disorders
#1
Thien Thien Lim
PURPOSE OF REVIEW: To provide an overview of paraneoplastic autoimmune disorders presenting with various movement disorders. RECENT FINDINGS: The spectrum of paraneoplastic autoimmune disorders has been expanding with the discovery of new antibodies against cell surface and intracellular antigens. Many of these paraneoplastic autoimmune disorders manifest as a form of movement disorder. With the discovery of new neuronal antibodies, an increasing number of idiopathic or neurodegenerative movement disorders are now being reclassified as immune-mediated movement disorders...
October 13, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28966575/pi3k-mtor-s6k-signaling-mediates-neuronal-viability-via-collapsin-response-mediator-protein-2-expression
#2
Eun J Na, Hye Yeon Nam, Jiyoung Park, Myung Ah Chung, Hyun Ae Woo, Hwa-Jung Kim
Collapsin response mediator protein (CRMP)-2 and the mammalian target of rapamycin complex 1 (mTORC1) signaling pathway are associated with common physiological functions such as neuronal polarity, axonal outgrowth and synaptic strength, as well as various brain disorders including epilepsy. But, their regulatory and functional links are unclear. Alterations in CRMP-2 expression that lead to its functional changes are implicated in brain disorders such as epilepsy. Here, we investigate whether changes in CRMP-2 expression, possibly regulated by mTOR-related signaling, correlates with neuronal growth and viability...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28895489/effects-of-mild-running-on-substantia-nigra-during-early-neurodegeneration
#3
Michael F Almeida, Carolliny M Silva, Rodrigo S Chaves, Nathan C R Lima, Renato S Almeida, Karla P Melo, Marilene Demasi, Tiago Fernandes, Edilamar M Oliveira, Luis E S Netto, Sandra M Cardoso, Merari F R Ferrari
Moderate physical exercise acts at molecular and behavioural levels, such as interfering in neuroplasticity, cell death, neurogenesis, cognition and motor functions. Therefore, the aim of this study is to analyse the cellular effects of moderate treadmill running upon substantia nigra during early neurodegeneration. Aged male Lewis rats (9-month-old) were exposed to rotenone 1mg/kg/day (8 weeks) and 6 weeks of moderate treadmill running, beginning 4 weeks after rotenone exposure. Substantia nigra was extracted and submitted to proteasome and antioxidant enzymes activities, hydrogen peroxide levels and Western blot to evaluate tyrosine hydroxylase (TH), alpha-synuclein, Tom-20, PINK1, TrkB, SLP1, CRMP-2, Rab-27b, LC3II and Beclin-1 level...
September 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28864883/transcriptional-regulation-of-crmp5-controls-neurite-outgrowth-through-sox5
#4
Nicolas Naudet, Aubin Moutal, Hong Nhung Vu, Naura Chounlamountri, Chantal Watrin, Sylvie Cavagna, Céline Malleval, Claire Benetollo, Claire Bardel, Marie-Aimée Dronne, Jérôme Honnorat, Claire Meissirel, Roger Besançon
Transcriptional regulation of proteins involved in neuronal polarity is a key process that underlies the ability of neurons to transfer information in the central nervous system. The Collapsin Response Mediator Protein (CRMP) family is best known for its role in neurite outgrowth regulation conducting to neuronal polarity and axonal guidance, including CRMP5 that drives dendrite differentiation. Although CRMP5 is able to control dendritic development, the regulation of its expression remains poorly understood...
September 1, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28859089/flavin-monooxygenases-regulate-caenorhabditis-elegans-axon-guidance-and-growth-cone-protrusion-with-unc-6-netrin-signaling-and-rac-gtpases
#5
Mahekta R Gujar, Aubrie M Stricker, Erik A Lundquist
The guidance cue UNC-6/Netrin regulates both attractive and repulsive axon guidance. Our previous work showed that in C. elegans, the attractive UNC-6/Netrin receptor UNC-40/DCC stimulates growth cone protrusion, and that the repulsive receptor, an UNC-5:UNC-40 heterodimer, inhibits growth cone protrusion. We have also shown that inhibition of growth cone protrusion downstream of the UNC-5:UNC-40 repulsive receptor involves Rac GTPases, the Rac GTP exchange factor UNC-73/Trio, and the cytoskeletal regulator UNC-33/CRMP, which mediates Semaphorin-induced growth cone collapse in other systems...
August 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28677754/active-exercise-promotes-achilles-tendon-healing-and-is-accompanied-by-the-upregulation-of-collapsin-response-mediator-protein%C3%A2-2-in-rats
#6
Bayixiati Qianman, Ayidaer Jialihasi, Batiza Asilehan, Aliya Kubai, Rakimbaiev Aibek, Aikeremu Wupuer, Wulanbai Tangkejie, Abudouheilil Maimaitiaili, Nuerai Shawutali, Aynaz Badelhan, Adili Aizezi, Amuding Aisaiding, Jianati Wuerliebieke, Yerzat Bakyt, Elihaer Makemutibieke, Jiasharete Jielile
Collapsin response mediator protein-2 (CRMP-2) is involved in neurite elongation and regeneration; however, its role in wound healing remains to be elucidated. The present study aimed to investigate the effects of active mobilization treatment on Achilles tendon healing and to determine the role of CRMP‑2 in the healing process. Sprague Dawley rats were subjected to Achilles tendon injury, which was verified by hematoxylin and eosin staining and scanning electronic microscopy. Immobilization induced the disruption of collagen fibril arrangement and promoted collagen fibril damage...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28663724/activation-of-transient-receptor-potential-vanilloid-4-impairs-the-dendritic-arborization-of-newborn-neurons-in-the-hippocampal-dentate-gyrus-through-the-ampk-and-akt-signaling-pathways
#7
Yujing Tian, Mengwen Qi, Zhouqing Wang, Chunfeng Wu, Zhen Sun, Yingchun Li, Sha Sha, Yimei Du, Lei Chen, Ling Chen
Neurite growth is an important process for the adult hippocampal neurogenesis which is regulated by a specific range of the intracellular free Ca(2+) concentration ([Ca(2+)]i). Transient receptor potential vanilloid 4 (TRPV4) is a calcium-permeable channel and activation of it causes an increase in [Ca(2+)]i. We recently reported that TRPV4 activation promotes the proliferation of stem cells in the adult hippocampal dentate gyrus (DG). The present study aimed to examine the effect of TRPV4 activation on the dendrite morphology of newborn neurons in the adult hippocampal DG...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28638935/jip1-and-jip3-cooperate-to-mediate-trkb-anterograde-axonal-transport-by-activating-kinesin-1
#8
Tao Sun, Yuan Li, Ting Li, Huixian Ma, Yunyun Guo, Xingyu Jiang, Ming Hou, Shuhong Huang, Zheyu Chen
Long-range anterograde axonal transport of TrkB is important for neurons to exert appropriate BDNF responses. TrkB anterograde axonal delivery is mediated by kinesin-1, which associates with TrkB via the adaptor protein JIP3 or the Slp1/Rab27B/CRMP-2 protein complex. However, little is known about the activation mechanisms of TrkB-loaded kinesin-1. Here, we show that JIP1 mediates TrkB anterograde axonal transport using JIP1 knockout mice, sciatic nerve ligation analysis and live imaging. Next, we proved that JIP1 and JIP3 cooperate to mediate TrkB anterograde axonal transport...
November 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28630144/crmp-1-enhances-evl-mediated-actin-elongation-to-build-lamellipodia-and-the-actin-cortex
#9
Hui-Chia Yu-Kemp, James P Kemp, William M Brieher
Cells can control actin polymerization by nucleating new filaments or elongating existing ones. We recently identified CRMP-1 as a factor that stimulates the formation of Listeria monocytogenes actin comet tails, thereby implicating it in actin assembly. We now show that CRMP-1 is a major contributor to actin assembly in epithelial cells, where it works with the Ena/VASP family member EVL to assemble the actin cytoskeleton in the apical cortex and in protruding lamellipodia. CRMP-1 and EVL bind to one another and together accelerate actin filament barbed-end elongation...
August 7, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28330852/a-controlled-release-mitochondrial-protonophore-reverses-hypertriglyceridemia-nonalcoholic-steatohepatitis-and-diabetes-in-lipodystrophic-mice
#10
Abudukadier Abulizi, Rachel J Perry, João Paulo G Camporez, Michael J Jurczak, Kitt Falk Petersen, Patricia Aspichueta, Gerald I Shulman
Lipodystrophy is a rare disorder characterized by complete or partial loss of adipose tissue. Patients with lipodystrophy exhibit hypertriglyceridemia, severe insulin resistance, type 2 diabetes, and nonalcoholic steatohepatitis (NASH). Efforts to ameliorate NASH in lipodystrophies with pharmacologic agents have met with limited success. We examined whether a controlled-release mitochondrial protonophore (CRMP) that produces mild liver-targeted mitochondrial uncoupling could decrease hypertriglyceridemia and reverse NASH and diabetes in a mouse model (fatless AZIP/F-1 mice) of severe lipodystrophy and diabetes...
July 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28322729/reprint-of-standardisation-and-use-of-the-alcohol-biomarker-carbohydrate-deficient-transferrin-cdt
#11
Anders Helander, Jos Wielders, Raymond Anton, Torsten Arndt, Vincenza Bianchi, Jean Deenmamode, Jan-Olof Jeppsson, John B Whitfield, Cas Weykamp, François Schellenberg
Carbohydrate-deficient transferrin (CDT) is a glycoform profile of serum transferrin that increases in response to sustained high alcohol intake and over the last decades has become an important alcohol biomarker with clinical and forensic applications. However, the wide range of CDT measurement procedures has resulted in lack of uniform results and reference limits, and hampered comparison of results. In 2005, the IFCC therefore founded a special working group (WG) aiming for standardisation of CDT measurement...
March 18, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28228834/anti-collapsing-response-mediating-protein-5-antibody-positive-paraneoplastic-perioptic-neuritis-without-typical-neurological-symptoms
#12
Nozomi Igarashi, Hiromasa Sawamura, Toshikatsu Kaburaki, Makoto Aihara
A 68-year-old male presented with blurred vision in both eyes. Ophthalmoscopy revealed bilateral prominent disc swelling and vitritis. No systematic neurological symptoms were observed. Magnetic resonance imaging revealed bilateral meningeal enhancement of the optic nerve. Small cell carcinoma was found, and antibodies against collapsing response-mediating protein-5 (CRMP-5) were detected in the serum. Ophthalmological manifestations disappeared during a decrease in tumour size with treatment for the malignancy...
February 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28117739/affinin-spilanthol-isolated-from-heliopsis-longipes-induces-vasodilation-via-activation-of-gasotransmitters-and-prostacyclin-signaling-pathways
#13
Jesús Eduardo Castro-Ruiz, Alejandra Rojas-Molina, Francisco J Luna-Vázquez, Fausto Rivero-Cruz, Teresa García-Gasca, César Ibarra-Alvarado
Heliopsis longipes roots have been widely used in Mexican traditional medicine to relieve pain, mainly, toothaches. Previous studies have shown that affinin, the major alkamide of these roots, induces potent antinociceptive and anti-inflammatory activities. However, the effect of H. longipes root extracts and affinin on the cardiovascular system have not been investigated so far. In the present study, we demonstrated that the dichloromethane and ethanolic extracts of H. longipes roots, and affinin, isolated from these roots, produce a concentration-dependent vasodilation of rat aorta...
January 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28074593/microtubule-associated-protein-1b-novel-paraneoplastic-biomarker
#14
Avi Gadoth, Thomas J Kryzer, Jim Fryer, Andrew McKeon, Vanda A Lennon, Sean J Pittock
OBJECTIVE: To report the identification of microtubule-associated protein (MAP) 1B as the antigen of the previously described Purkinje cell cytoplasmic antibody type 2 (PCA-2) antibody, its frequency, and clinical, oncological, and serological associations. METHODS: Archival serum or cerebrospinal fluid (CSF) specimens were available from 96 of 118 consecutive PCA-2-IgG-seropositive patients identified during 1993-2016. The autoantigen, defined in mouse brain lysate by Western blot and mass spectrometry, was confirmed by dual immunohistochemical staining using commercial antibodies...
February 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28044206/collapsin-response-mediator-protein-2-high-resolution-crystal-structure-sheds-light-on-small-molecule-binding-post-translational-modifications-and-conformational-flexibility
#15
Matti Myllykoski, Anne Baumann, Kenneth Hensley, Petri Kursula
Collapsin response mediator protein 2 (CRMP-2) is a neuronal protein involved in axonal pathfinding. Intense research is focusing on its role in various neurological diseases. Despite a wealth of studies, not much is known about the molecular mechanisms of CRMP-2 function in vivo. The detailed structure-function relationships of CRMP-2 have also largely remained unknown, in part due to the fact that the available crystal structures lack the C-terminal tail, which is known to be a target for many post-translational modifications and protein interactions...
April 2017: Amino Acids
https://www.readbyqxmd.com/read/28025028/ifcc-approved-hplc-reference-measurement-procedure-for-the-alcohol-consumption-biomarker-carbohydrate-deficient-transferrin-cdt-its-validation-and-use
#16
François Schellenberg, Jos Wielders, Raymond Anton, Vincenza Bianchi, Jean Deenmamode, Cas Weykamp, John Whitfield, Jan-Olof Jeppsson, Anders Helander
Carbohydrate-deficient transferrin (CDT) is used as a biomarker of sustained high alcohol consumption. The currently available measurement procedures for CDT are based on various analytical techniques (HPLC, capillary electrophoresis, nephelometry), some differing in the definition of the analyte and using different reference intervals and cut-off values. The Working Group on Standardization of CDT (WG-CDT), initiated by the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC), has validated an HPLC candidate reference measurement procedure (cRMP) for CDT (% disialotransferrin to total transferrin based on peak areas), demonstrating that it is suitable as a reference measurement procedure (RMP) for CDT...
February 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28019696/crmp4-inhibits-bone-formation-by-negatively-regulating-bmp-and-rhoa-signaling
#17
Basem M Abdallah, Florence Figeac, Kenneth H Larsen, Nicholas Ditzel, Pankaj Keshari, Adiba Isa, Abbas Jafari, Thomas L Andersen, Jean-Marie Delaisse, Yoshio Goshima, Toshio Ohshima, Moustapha Kassem
We identified the neuroprotein collapsing response mediator protein-4 (CRMP4) as a noncanonical osteogenic factor that regulates the differentiation of mouse bone marrow skeletal stem cells (bone marrow stromal stem cells [mBMSCs]) into osteoblastic cells. CRMP4 is the only member of the CRMP1-CRMP5 family to be expressed by mBMSCs and in osteoprogenitors of both adult mouse and human bones. In vitro gain-of-function and loss-of-function of CRMP4 in murine stromal cells revealed its inhibitory effect on osteoblast differentiation...
May 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/27836492/crmp1-and-crmp4-are-required-for-proper-orientation-of-dendrites-of-cerebral-pyramidal-neurons-in-the-developing-mouse-brain
#18
Ryosuke Takaya, Jun Nagai, Wenfui Piao, Emi Niisato, Takeru Nakabayashi, Yuki Yamazaki, Fumio Nakamura, Naoya Yamashita, Papachan Kolattukudy, Yoshio Goshima, Toshio Ohshima
Neural circuit formation is a critical process in brain development. Axon guidance molecules, their receptors, and intracellular mediators are important to establish neural circuits. Collapsin response mediator proteins (CRMPs) are known intercellular mediators of a number of repulsive guidance molecules. Studies of mutant mice suggest roles of CRMPs in dendrite development. However, molecular mechanisms of CRMP-mediated dendritic development remain to elucidate. In this study, we show abnormal orientation of basal dendrites (extension to deeper side) of layer V pyramidal neurons in the cerebral cortex of CRMP4-/- mice...
January 15, 2017: Brain Research
https://www.readbyqxmd.com/read/27787857/micro-cali-to-study-localized-roles-of-the-semaphorin-signaling-component-crmp-in-axon-growth
#19
Yoshio Goshima, Kohtaro Takei
Elucidating the local function of proteins is essential for understanding not only the individual proteins but also the organization of the cell or even tissue as a whole. However, until now, few attempts have been made to understand local proteins function in cells because of a lack of acute inactivation technique of local proteins with high versatility. Here we describe the application of the chromophore-assisted light inactivation (CALI) method to elucidate the role of the semaphorin signaling component CRMP located within the growth cone area in axon growth and growth cone turning...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27759576/paraneoplastic-optic-neuropathy-associated-with-purkinje-cell-antibody-2-in-a-patient-with-small-cell-lung-cancer
#20
Jonathan A Micieli, Edward A Margolin
Paraneoplastic optic neuropathy (PON) is a rare cause of vision loss usually associated with small cell lung cancer. Patients with this condition usually test positive for anti-collapsin response mediating protein-5 (CRMP-5). We describe a case of a 57-year-old woman with bilateral vision loss with the characteristic features of CRMP-5 PON including bilateral optic disc edema and vitreous cells. However, she was negative for anti-CRMP-5 including a negative Western blot on two occasions, but positive for Purkinje Cell Antibody (PCA)-2...
March 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
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