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https://www.readbyqxmd.com/read/28323540/identification-of-multipotent-stem-cells-in-human-brain-tissue-following-stroke
#1
Kotaro Tatebayashi, Yasue Tanaka, Akiko Nakano-Doi, Rika Sakuma, Saeko Kamachi, Manabu Shirakawa, Kazutaka Uchida, Hiroto Kageyama, Toshinori Takagi, Shinichi Yoshimura, Tomohiro Matsuyama, Takayuki Nakagomi
Perivascular regions of the brain harbor multipotent stem cells. We previously demonstrated that brain pericytes near blood vessels also develop multipotency following experimental ischemia in mice, and that these ischemia-induced multipotent stem cells (iSCs) can contribute to neurogenesis. However, it is essential to understand the traits of iSCs in the post-stroke human brain for possible applications in stem cell-based therapies for stroke patients. Here we report for the first time that iSCs can be isolated from the post-stroke human brain...
March 21, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28320116/in-vitro-non-viral-murine-pro-neurotrophin-3-gene-transfer-into-rat-bone-marrow-stromal-cells
#2
Shahram Darabi, Taki Tiraihi, AliReza Delshad, Majid Sadeghizadeh, Wisam Khalil, Taher Taheri
Neurotrophin 3 (NT-3) is an important factor for promoting prenatal neural development, as well as regeneration, axogenesis and plasticity in postnatal life. Therapy with NT-3 was reported to improve the condition of patients suffering from degenerative diseases and traumatic injuries, however, the disadvantage of NT-3 protein delivery is its short half-life, thus our alternative approach is the use of NT-3 gene therapy. In this study, the bone marrow stromal cells (BMSCs) were isolated from adult rats, cultured for 4 passages and transfected with either pEGFP-N1 or a constructed vector containing murine proNT-3 (pSecTag2/HygroB-murine proNT-3) using Lipofectamine 2000 followed by Hygromycin B (200mg/kg)...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28317947/parietal-operculum-and-motor-cortex-activities-predict-motor-recovery-in-moderate-to-severe-stroke
#3
Firdaus Fabrice Hannanu, Thomas A Zeffiro, Laurent Lamalle, Olivier Heck, Félix Renard, Antoine Thuriot, Alexandre Krainik, Marc Hommel, Olivier Detante, Assia Jaillard
While motor recovery following mild stroke has been extensively studied with neuroimaging, mechanisms of recovery after moderate to severe strokes of the types that are often the focus for novel restorative therapies remain obscure. We used fMRI to: 1) characterize reorganization occurring after moderate to severe subacute stroke, 2) identify brain regions associated with motor recovery and 3) to test whether brain activity associated with passive movement measured in the subacute period could predict motor outcome six months later...
2017: NeuroImage: Clinical
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
#4
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/28306359/spinal-cord-injuries-how-could-cell-therapy-help
#5
Anna Badner, Ahad M Siddiqui, Michael G Fehlings
Spinal cord injury (SCI) is a devastating condition, where regenerative failure and cell loss lead to paralysis. The heterogeneous and time-sensitive pathophysiology has made it difficult to target tissue repair. Despite many medical advances, there are no effective regenerative therapies. As stem cells offer multi-targeted and environmentally responsive benefits, cell therapy is a promising treatment approach. Areas covered: This review highlights the cell therapies being investigated for SCI, including Schwann cells, olfactory ensheathing cells, mensenchymal stem/stromal cells, neural precursors, oligodendrocyte progenitors, embryonic stem cells, and induced pluripotent stem cells...
March 17, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28304188/the-effect-of-unilateral-thalamic-deep-brain-stimulation-on-the-vocal-dysfunction-in-a-patient-with-spasmodic-dysphonia-interrogating-cerebellar-and-pallidal-neural-circuits
#6
Anujan Poologaindran, Zurab Ivanishvili, Murray D Morrison, Linda A Rammage, Mini K Sandhu, Nancy E Polyhronopoulos, Christopher R Honey
Spasmodic dysphonia (SD) is a neurological disorder of the voice where a patient's ability to speak is compromised due to involuntary contractions of the intrinsic laryngeal muscles. Since the 1980s, SD has been treated with botulinum toxin A (BTX) injections into the throat. This therapy is limited by the delayed-onset of benefits, wearing-off effects, and repeated injections required every 3 months. In a patient with essential tremor (ET) and coincident SD, the authors set out to quantify the effects of thalamic deep brain stimulation (DBS) on vocal function while investigating the underlying motor thalamic circuitry...
March 17, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28303738/neural-stem-cell-transplantation-in-ischemic-stroke-a-role-for-preconditioning-and-cellular-engineering
#7
Joshua D Bernstock, Luca Peruzzotti-Jametti, Daniel Ye, Florian A Gessler, Dragan Maric, Nunzio Vicario, Yang-Ja Lee, Stefano Pluchino, John M Hallenbeck
Ischemic stroke continues to be a leading cause of morbidity and mortality throughout the world. To protect and/or repair the ischemic brain, a multitiered approach may be centered on neural stem cell (NSC) transplantation. Transplanted NSCs exert beneficial effects not only via structural replacement, but also via immunomodulatory and/or neurotrophic actions. Unfortunately, the clinical translation of such promising therapies remains elusive, in part due to their limited persistence/survivability within the hostile ischemic microenvironment...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28303298/ultrasound-guided-therapeutic-injections-for-neural-pathology-about-the-foot-and-ankle-a-4%C3%A2-year-retrospective-review
#8
William R Walter, Christopher J Burke, Ronald S Adler
OBJECTIVE: To describe a 4-year clinical experience with ultrasound-guided therapeutic perineural injections of peripheral nerves about the foot and ankle. MATERIALS AND METHODS: Retrospective analysis of foot and ankle perineural injections performed between January 2012 and August 2016. Demographics, clinical indications, presence of structural pathology, immediate and interval pain relief, as well as complications were recorded. RESULTS: Fifty-nine therapeutic injections were performed among 46 patients, accounting for multiple injections in a single visit or multiple visits [mean age = 43 years (range 18-75), 31 female (67%) and 15 male (33%)]...
March 16, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28301770/imaging-and-optically-manipulating-neuronal-ensembles
#9
Luis Carrillo-Reid, Weijian Yang, Jae-Eun Kang Miller, Darcy S Peterka, Rafael Yuste
The neural code that relates the firing of neurons to the generation of behavior and mental states must be implemented by spatiotemporal patterns of activity across neuronal populations. These patterns engage selective groups of neurons, called neuronal ensembles, which are emergent building blocks of neural circuits. We review optical and computational methods, based on two-photon calcium imaging and two-photon optogenetics, to detect, characterize, and manipulate neuronal ensembles in three dimensions. We review data using these methods in the mammalian cortex that demonstrate the existence of neuronal ensembles in the spontaneous and evoked cortical activity in vitro and in vivo...
March 15, 2017: Annual Review of Biophysics
https://www.readbyqxmd.com/read/28299433/mri-guided-cryoablation-of-the-posterior-femoral-cutaneous-nerve-for-the-treatment-of-neuropathy-mediated-sitting-pain
#10
Dharmdev H Joshi, Gaurav K Thawait, Filippo Del Grande, Jan Fritz
Neuropathy of the posterior femoral cutaneous nerve may manifest as pain and paresthesia in the skin over the inferior buttocks, posterior thigh, and popliteal region. Current treatment options include physical and oral pain therapy, perineural injections, and surgical neurectomy. Perineural steroid injections may provide short-term pain relief; however, to our knowledge, there is currently no minimally invasive denervation procedure for sustained pain relief that could serve as an alternative to surgical neurectomy...
March 15, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28299207/zinc-in-the-monoaminergic-theory-of-depression-its-relationship-to-neural-plasticity
#11
REVIEW
Urszula Doboszewska, Piotr Wlaź, Gabriel Nowak, Maria Radziwoń-Zaleska, Ranji Cui, Katarzyna Młyniec
Preclinical and clinical studies have demonstrated that zinc possesses antidepressant properties and that it may augment the therapy with conventional, that is, monoamine-based, antidepressants. In this review we aim to discuss the role of zinc in the pathophysiology and treatment of depression with regard to the monoamine hypothesis of the disease. Particular attention will be paid to the recently described zinc-sensing GPR39 receptor as well as aspects of zinc deficiency. Furthermore, an attempt will be made to give a possible explanation of the mechanisms by which zinc interacts with the monoamine system in the context of depression and neural plasticity...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28298418/disrupting-the-cd47-sirp%C3%AE-anti-phagocytic-axis-by-a-humanized-anti-cd47-antibody-is-an-efficacious-treatment-for-malignant-pediatric-brain-tumors
#12
Sharareh Gholamin, Siddhartha S Mitra, Abdullah H Feroze, Jie Liu, Suzana A Kahn, Michael Zhang, Rogelio Esparza, Chase Richard, Vijay Ramaswamy, Marc Remke, Anne K Volkmer, Stephen Willingham, Anitha Ponnuswami, Aaron McCarty, Patricia Lovelace, Theresa A Storm, Simone Schubert, Gregor Hutter, Cyndhavi Narayanan, Pauline Chu, Eric H Raabe, Griffith Harsh, Michael D Taylor, Michelle Monje, Yoon-Jae Cho, Ravi Majeti, Jens P Volkmer, Paul G Fisher, Gerald Grant, Gary K Steinberg, Hannes Vogel, Michael Edwards, Irving L Weissman, Samuel H Cheshier
Morbidity and mortality associated with pediatric malignant primary brain tumors remain high in the absence of effective therapies. Macrophage-mediated phagocytosis of tumor cells via blockade of the anti-phagocytic CD47-SIRPα interaction using anti-CD47 antibodies has shown promise in preclinical xenografts of various human malignancies. We demonstrate the effect of a humanized anti-CD47 antibody, Hu5F9-G4, on five aggressive and etiologically distinct pediatric brain tumors: group 3 medulloblastoma (primary and metastatic), atypical teratoid rhabdoid tumor, primitive neuroectodermal tumor, pediatric glioblastoma, and diffuse intrinsic pontine glioma...
March 15, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28298263/a-proof-of-principle-simulation-for-closed-loop-control-based-on-preexisting-experimental-thalamic-dbs-enhanced-instrumental-learning
#13
Ching-Fu Wang, Shih-Hung Yang, Sheng-Huang Lin, Po-Chuan Chen, Yu-Chun Lo, Han-Chi Pan, Hsin-Yi Lai, Lun-De Liao, Hui-Ching Lin, Hsu-Yan Chen, Wei-Chen Huang, Wun-Jhu Huang, You-Yin Chen
Deep brain stimulation (DBS) has been applied as an effective therapy for treating Parkinson's disease or essential tremor. Several open-loop DBS control strategies have been developed for clinical experiments, but they are limited by short battery life and inefficient therapy. Therefore, many closed-loop DBS control systems have been designed to tackle these problems by automatically adjusting the stimulation parameters via feedback from neural signals, which has been reported to reduce the power consumption...
February 24, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28297573/magnetic-resonance-imaging-guided-delivery-of-neural-stem-cells-into-the-basal-ganglia-of-nonhuman-primates-reveals-a-pulsatile-mode-of-cell-dispersion
#14
Kristen E Malloy, Jinqi Li, Gourav R Choudhury, April Torres, Shruti Gupta, Chris Kantorak, Tim Goble, Peter T Fox, Geoffrey D Clarke, Marcel M Daadi
Optimal stem cell delivery procedures are critical to the success of the cell therapy approach. Variables such as flow rate, suspension solution, needle diameter, cell density, and tissue mechanics affect tissue penetration, backflow along the needle, and the dispersion and survival of injected cells during delivery. Most cell transplantation centers engaged in human clinical trials use custom-designed cannula needles, syringes, or catheters, sometimes precluding the use of magnetic resonance imaging (MRI)-guided delivery to target tissue...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28296571/efficient-generation-of-functional-schwann-cells-from-adipose-derived-stem-cells-in-defined-conditions
#15
Songtao Xie, Fan Lu, Juntao Han, Ke Tao, Hongtao Wang, Alfred Simental, Dahai Hu, Hao Yang
Schwann cells (SCs) are hitherto regarded as the most promising candidates for viable cell-based therapy to peripheral nervous system (PNS) injuries or degenerative diseases. However, the extreme drawbacks of transplanting autologous SCs for clinical applications still represent a significant bottleneck in neural regenerative medicine, mainly owing to the need of sacrificing a functional nerve to generate autologous SCs and the nature of slow expansion of the SCs. Thus, it is of great importance to establish an alternative cell system for the generation of sufficient SCs...
March 15, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28296277/effect-of-icariin-in-combination-with-daily-sildenafil-on-penile-atrophy-and-erectile-dysfunction-in-a-rat-model-of-bilateral-cavernous-nerves-injury
#16
Y Xu, H Xin, Y Wu, R Guan, H Lei, X Fu, Z Xin, Y Yang
The commonly utilized phosphodiesterase type 5 inhibitors do not lead to satisfactory penile erection after radical prostatectomy mainly because of insufficient nitric oxide drive from the damaged cavernous nerves. The aim of this study was to assess the efficacy and mechanisms of icariin in combination with daily sildenafil on neurogenic erectile dysfunction and penile atrophy in a rat model of bilateral cavernous nerves injury. Sixty male Sprague-Dawley rats injected with 5-ethynyl-2-deoxyuridine (50 mg/kg) at postnatal day 1 for the purpose of tracking endogenous stem cells in penis...
March 10, 2017: Andrology
https://www.readbyqxmd.com/read/28295275/pannexin-hemichannels-a-novel-promising-therapy-target-for-oxidative-stress-related-diseases
#17
REVIEW
Jin Xu, Linxi Chen, Lanfang Li
Pannexins, which contain three subtypes: pannexin-1, pannexin-2 and pannexin-3, are vertebrate glycoproteins that form non-junctional plasma membrane intracellular hemichannels via oligomerization. Oxidative stress refers to an imbalance of the generation and elimination of reactive oxygen species (ROS). Studies have shown that elevated ROS levels are pivotal in the development of a variety of diseases. Recent studies indicate that the occurrence of these oxidative stress related diseases is associated with pannexin hemichannels...
March 14, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28294478/the-predictive-value-of-dorsal-cingulate-activity-and-fractional-anisotropy-on-long-term-ptsd-symptom-severity
#18
Mitzy Kennis PhD, Sanne J H van Rooij PhD, Alieke Reijnen MSc, Elbert Geuze PhD
BACKGROUND: Posttraumatic stress disorder (PTSD) can be treated with trauma-focused therapy, although only about 50% of the patients recover on the short-term. In order to improve response rates it is important to identify who will and will not recover from trauma-focused therapy. Although previous studies reported dorsal anterior cingulate cortex (ACC) activity, as well as dorsal cingulum bundle white matter microstructure integrity as markers for the persistence of PTSD symptoms on the short-term, it remains unclear whether these markers also predict long-term PTSD symptom severity...
March 15, 2017: Depression and Anxiety
https://www.readbyqxmd.com/read/28293185/hypoconnectivity-of-resting-state-networks-in-persons-with-aphasia-compared-with-healthy-age-matched-adults
#19
Chaleece W Sandberg
Aphasia is a language disorder affecting more than one million people in the US. While language function has traditionally been the focus of neuroimaging research, other cognitive functions are affected in this population, which has implications not only for those specific processes but also for the interaction of language and other cognitive functions. Resting state fMRI (rs-fMRI) is a practical and informative way to explore and characterize general cognitive engagement and/or health in this population, but it is currently underutilized...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28291038/psychotherapy-research-and-the-nimh-an-either-or-or-both-and-research-agenda
#20
Eric M Plakun
There is a need for psychotherapy research to determine the effective, nonspecific or shared elements of psychotherapy regardless of therapy school. In an apparent "either/or" rather than "both/and" choice, the National Institute of Mental Health (NIMH) has committed its research resources to study of neural mechanisms and biomarkers, while greatly reducing funding for research into clinical methods, including psychotherapy. This column explores the potential effect of this decision on patient care and reviews questions raised by some about whether the underlying "big idea" behind the NIMH research approach is supported by the results of several decades of brain and genomics research...
March 2017: Journal of Psychiatric Practice
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