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https://www.readbyqxmd.com/read/28938636/patz1-is-a-new-prognostic-marker-of-glioblastoma-associated-with-the-stem-like-phenotype-and-enriched-in-the-proneural-subtype
#1
Elia Guadagno, Michela Vitiello, Paola Francesca, Gaetano Calì, Federica Caponnetto, Daniela Cesselli, Simona Camorani, Giorgio Borrelli, Marialuisa Califano, Paolo Cappabianca, Claudio Arra, Elvira Crescenzi, Laura Cerchia, Maria Laura Del Basso De Caro, Monica Fedele
Glioblastoma (GBM), the most malignant of the brain tumors, has been classified on the basis of molecular signature into four subtypes: classical, mesenchymal, proneural and neural, among which the mesenchymal and proneural subtypes have the shortest and longest survival, respectively. Here we show that the transcription factor PATZ1 gene is upregulated in gliomas compared to normal brain and, among GBMs, is particularly enriched in the proneural subtype and co-localize with stemness markers. Accordingly, in GBM-derived glioma-initiating stem cells (GSCs) PATZ1 is overexpressed compared to differentiated tumor cells and its expression significantly correlates with the characteristic stem cell capacity to grow as neurospheres in vitro...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28937975/umbilical-cord-blood-cells-for-treatment-of-cerebral-palsy-timing-and-treatment-options
#2
REVIEW
Courtney A McDonald, Michael C Fahey, Graham Jenkin, Suzanne L Miller
Cerebral palsy is the most common cause of physical disability in children, and there is no cure. Umbilical cord blood (UCB) cell therapy for the treatment of children with cerebral palsy is currently being assessed in clinical trials. While there is much interest in the use of UCB stem cells for neuroprotection and neuroregeneration, the mechanisms of action are not fully understood. Further, UCB contains many stem and progenitor cells of interest, and we will point out that individual cell types within UCB may elicit specific effects...
September 22, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28937342/do-chimeras-have-minds
#3
Benjamin Capps
Suppose that a colleague proposed a fantastic experiment: to introduce human stem cells into a neonatal mouse so that its entire brain developed into "human-like" neuronal structures. The colleague claimed it would still be a mouse, and that its chimeric brain would be nothing like a "human" one. It would not, as a result, have a moral status beyond its nonhuman animal origins. Thus, the "human neuron mouse" would allow scientists to tinker with human-like neurology in ways that would be precluded if it were a human being, and that would promise to lead to substantial understanding of the destructive and incurable brain diseases that befall humanity...
October 2017: Cambridge Quarterly of Healthcare Ethics: CQ: the International Journal of Healthcare Ethics Committees
https://www.readbyqxmd.com/read/28937044/priming-of-the-cells-hypoxic-preconditioning-for-stem-cell-therapy
#4
REVIEW
Zheng Z Wei, Yan-Bing Zhu, James Y Zhang, Myles R McCrary, Song Wang, Yong-Bo Zhang, Shan-Ping Yu, Ling Wei
OBJECTIVE: Stem cell-based therapies are promising in regenerative medicine for protecting and repairing damaged brain tissues after injury or in the context of chronic diseases. Hypoxia can induce physiological and pathological responses. A hypoxic insult might act as a double-edged sword, it induces cell death and brain damage, but on the other hand, sublethal hypoxia can trigger an adaptation response called hypoxic preconditioning or hypoxic tolerance that is of immense importance for the survival of cells and tissues...
October 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28936798/conditioned-medium-of-human-adipose-mesenchymal-stem-cells-increases-wound-closure-and-protects-human-astrocytes-following-scratch-assay-in-vitro
#5
Eliana Baez-Jurado, Oscar Hidalgo-Lanussa, Gina Guio-Vega, Ghulam Md Ashraf, Valentina Echeverria, Gjumrakch Aliev, George E Barreto
Astrocytes perform essential functions in the preservation of neural tissue. For this reason, these cells can respond with changes in gene expression, hypertrophy, and proliferation upon a traumatic brain injury event (TBI). Different therapeutic strategies may be focused on preserving astrocyte functions and favor a non-generalized and non-sustained protective response over time post-injury. A recent strategy has been the use of the conditioned medium of human adipose mesenchymal stem cells (CM-hMSCA) as a therapeutic strategy for the treatment of various neuropathologies...
September 21, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28935704/the-splicing-co-factor-barricade-tat-sf1-is-required-for-cell-cycle-and-lineage-progression-in-drosophila-neural-stem-cells
#6
Monika K Abramczuk, Thomas R Burkard, Vivien Rolland, Victoria Steinmann, Peter Duchek, Yanrui Jiang, Sebastian Wissel, Heinrich Reichert, Juergen A Knoblich
Stem cells need to balance self-renewal and differentiation for correct tissue development and homeostasis. Defects in this balance can lead to developmental defects or tumor formation. In recent years, mRNA splicing has emerged as one important mechanism regulating cell fate decisions. Here we address the role of the evolutionary conserved splicing co-factor Barricade (Barc)/Tat-SF1/CUS2 in Drosophila neural stem cell (neuroblast) lineage formation. We show that Barc is required for the generation of neurons during Drosophila brain development by ensuring correct neural progenitor proliferation and differentiation...
September 21, 2017: Development
https://www.readbyqxmd.com/read/28934395/abnormal-polyamine-metabolism-is-unique-to-the-neuropathic-forms-of-mps-potential-for-biomarker-development-and-insight-into-pathogenesis
#7
Christian Hinderer, Nathan Katz, Jean-Pierre Louboutin, Peter Bell, Jakub Tolar, Paul J Orchard, Troy C Lund, Mohamad Nayal, Liwei Weng, Clementina Mesaros, Carolina F M de Souza, Amauri Dalla Corte, Roberto Giugliani, James M Wilson
The mucopolysaccharidoses (MPS) are rare genetic disorders marked by severe somatic and neurological symptoms. Development of treatments for the neurological manifestations of MPS has been hindered by the lack of objective measures of central nervous system disease burden. Identification of biomarkers for central nervous system disease in MPS patients would facilitate the evaluation of new agents in clinical trials. High throughput metabolite screening of cerebrospinal fluid (CSF) samples from a canine model of MPS I revealed a marked elevation of the polyamine, spermine, in affected animals, and gene therapy studies demonstrated that reduction of CSF spermine reflects correction of brain lesions in these animals...
October 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28934393/neurofibromatosis-type-1-alternative-splicing-is-a-key-regulator-of-ras-erk-signaling-and-learning-behaviors-in-mice
#8
Hieu T Nguyen, Melissa N Hinman, Xuan Guo, Alok Sharma, Hiroyuki Arakawa, Guangbin Luo, Hua Lou
Appropriate activation of the Ras/extracellular signal-regulated kinase (ERK) protein signaling cascade within the brain is crucial for optimal learning and memory. One key regulator of this cascade is the Nf1 Ras GTPase activating protein (RasGAP), which attenuates Ras/ERK signaling by converting active Ras is bound to guanosine triphosphate, activating Ras into inactive Ras is bound to guanosine diphosphate, inactivating Ras. A previous study using embryonic stem cells and embryonic stem cell-derived neurons indicated that Nf1 RasGAP activity is modulated by the highly regulated alternative splicing of Nf1 exon 23a...
October 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28934108/markers-of-microbial-translocation-and-immune-activation-predict-cognitive-processing-speed-in-heavy-drinking-men-living-with-hiv
#9
Mollie A Monnig, Christopher W Kahler, Patricia A Cioe, Peter M Monti, Kenneth H Mayer, David W Pantalone, Ronald A Cohen, Bharat Ramratnam
HIV infection and alcohol use disorder are associated with deficits in neurocognitive function. Emerging evidence points to pro-inflammatory perturbations of the gut-brain axis as potentially contributing to neurocognitive impairment in the context of HIV and chronic heavy alcohol use. This study examined whether plasma markers of microbial translocation (LPS) from the gastrointestinal tract and related immune activation (sCD14, EndoCAb) were associated with neurocognition in 21 men living with HIV who were virally suppressed on antiretroviral therapy...
September 21, 2017: Microorganisms
https://www.readbyqxmd.com/read/28933221/neural-stem-cell-transplantation-is-associated-with-inhibition-of-apoptosis-bcl-xl-upregulation-and-recovery-of-neurological-function-in-a-rat-model-of-traumatic-brain-injury
#10
Ai-Lan Pang, Liu-Lin Xiong, Qing-Jie Xia, Fen Liu, You-Cui Wang, Fei Liu, Piao Zhang, Bu-Liang Meng, Sheng Tan, Ting-Hua Wang
Traumatic brain injury (TBI) is a common disease that usually causes severe neurological damage, and current treatment is far from satisfactory. The neuroprotective effects of neural stem cell (NSC) transplantation in the injured nervous system have largely been known, but the underlying mechanisms remain unclear, and their limited sources impede their clinical application. Here, we established a rat model of TBI by dropping a weight onto the cortical motor area of the brain and explored the effect of engrafted NSCs (passage 3, derived from the hippocampus of embryonic 12- to 14-d green fluorescent protein transgenic mice) on TBI rats...
July 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28933218/effects-of-human-es-derived-neural-stem-cell-transplantation-and-kindling-in-a-rat-model-of-traumatic-brain-injury
#11
Stefania Beretta, Kelly M Cunningham, Daniel L Haus, Eric M Gold, Harvey Perez, Luci López-Velázquez, Brian J Cummings
Traumatic brain injury (TBI) is one of the leading causes of death and disability in the population worldwide, with a broad spectrum of symptoms and disabilities. Posttraumatic hyperexcitability is one of the most common neurological disorders that affect people after a head injury. A reliable animal model of posttraumatic hyperexcitability induced by TBI which allows one to test effective treatment strategies is yet to be developed. To address these issues, in the present study, we tested human embryonic stem cell-derived neural stem cell (NSC) transplantation in an animal model of posttraumatic hyperexcitability in which the brain injury was produced in one hemisphere of immunodeficient athymic nude rats by controlled cortical impact, and spontaneous seizures were produced by repeated electrical stimulation (kindling) in the contralateral hemisphere...
July 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28933214/magnetic-enhancement-of-stem-cell-targeted-delivery-into-the-brain-following-mr-guided-focused-ultrasound-for-opening-the-blood-brain-barrier
#12
Wei-Bin Shen, Pavlos Anastasiadis, Ben Nguyen, Deborah Yarnell, Paul J Yarowsky, Victor Frenkel, Paul S Fishman
Focused ultrasound (FUS)-mediated blood-brain barrier disruption (BBBD) can enable even large therapeutics such as stem cells to enter the brain from the bloodstream. However, the efficiency is relatively low. Our previous study showed that human neural progenitor cells (hNPCs) loaded with superparamagnetic iron oxide nanoparticles (SPIONs) in culture were attracted by an external magnetic field. In vivo, enhanced brain retention was observed near a magnet mounted on the skull in a rat model of traumatic brain injury, where BBBD also occurs...
July 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28932245/electromagnetic-fields-for-the-regulation-of-neural-stem-cells
#13
REVIEW
Mengchu Cui, Hongfei Ge, Hengli Zhao, Yongjie Zou, Yujie Chen, Hua Feng
Localized magnetic fields (MFs) could easily penetrate the scalp, skull, and meninges, thus inducing an electrical current in both the central and peripheral nervous systems, which is primarily used in transcranial magnetic stimulation (TMS) for inducing specific effects on different regions or cells that play roles in various brain activities. Studies of repetitive transcranial magnetic stimulation (rTMS) have led to novel attractive therapeutic approaches. Neural stem cells (NSCs) in adult human brain are able to self-renew and possess multidifferential ability to maintain homeostasis and repair damage after acute central nervous system...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28932115/the-long-term-fate-of-mesenchymal-stem-cells-labeled-with-magnetic-resonance-imaging-visible-polymersomes-in-cerebral-ischemia
#14
Xiaohui Duan, Liejing Lu, Yong Wang, Fang Zhang, Jiaji Mao, Minghui Cao, Bingling Lin, Xiang Zhang, Xintao Shuai, Jun Shen
Understanding the long-term fate and potential mechanisms of mesenchymal stem cells (MSCs) after transplantation is essential for improving functional benefits of stem cell-based stroke treatment. Magnetic resonance imaging (MRI) is considered an attractive and clinically translatable tool for longitudinal tracking of stem cells, but certain controversies have arisen in this regard. In this study, we used SPION-loaded cationic polymersomes to label green fluorescent protein (GFP)-expressing MSCs to determine whether MRI can accurately reflect survival, long-term fate, and potential mechanisms of MSCs in ischemic stroke therapy...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28931212/temozolomide-resistant-human-brain-tumor-stem-cells-are-susceptible-to-recombinant-vesicular-stomatitis-virus-and-double-deleted-vaccinia-virus-in-vitro
#15
Bin Jiang, Xueqing Lun, Xiaoguang Hao, Yihua Wang, Xin Yin, Dezhang Huang, Wei He, Zhigang Wang
BACKGROUND: Malignant glioma still has a poor prognosis and remains incurable. Although temozolomide (TMZ) has demonstrated antitumor activity, its use recently has been halted because of some patients' resistance to this drug. New treatments are desperately needed. An oncolytic virus (virotherapy) is being developed as a novel cancer therapy. We have previously reported that recombinant Vesicular Stomatitis Virus (VSV-ΔM51) and double deleted Vaccinia Virus (vvDD) infected and killed glioma cell lines in vitro and prolonged survival in animal glioma models...
September 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28930691/dna-methylome-analysis-identifies-transcription-factor-based-epigenomic-signatures-of-multilineage-competence-in-neural-stem-progenitor-cells
#16
Tsukasa Sanosaka, Takuya Imamura, Nobuhiko Hamazaki, MuhChyi Chai, Katsuhide Igarashi, Maky Ideta-Otsuka, Fumihito Miura, Takashi Ito, Nobuyuki Fujii, Kazuho Ikeo, Kinichi Nakashima
Regulation of the epigenome during in vivo specification of brain stem cells is still poorly understood. Here, we report DNA methylome analyses of directly sampled cortical neural stem and progenitor cells (NS/PCs) at different development stages, as well as those of terminally differentiated cortical neurons, astrocytes, and oligodendrocytes. We found that sequential specification of cortical NS/PCs is regulated by two successive waves of demethylation at early and late development stages, which are responsible for the establishment of neuron- and glia-specific low-methylated regions (LMRs), respectively...
September 19, 2017: Cell Reports
https://www.readbyqxmd.com/read/28929517/neural-differentiation-of-bone-marrow-mesenchymal-stem-cells-with-human-brain-derived-neurotrophic-factor-gene-modified-in-functionalized-self-assembling-peptide-hydrogel-in-vitro
#17
Hongbin Luo, Changsheng Xu, Zhiwei Liu, Lin Yang, Yunda Hong, Guisheng Liu, Huifen Zhong, Xinyi Cai, Xuping Lin, Xiaokun Chen, Changsheng Wang, Nanwen Zhang, Weihong Xu
OBJECTIVE: To investigate the biocompatibility and differentiation of human brain-derived neurotrophic factor (hBDNF) gene-modified bone marrow mesenchymal stem cells (hBDNF-rMSCs) in a functionalized self-assembling peptide hydrogel. METHODS: hBDNF were engineered in rMSCs using adenovirus vector and the enhanced green fluorescence protein (eGFP) was used as a reporter gene. MSC-specific surface markers (CD90,CD29 and CD45)were used for identifying rMSCs. Fluorescence microscope was used to detect the transfection of rMSCs...
September 19, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28929335/convection-enhanced-delivery-of-sulfasalazine-prolongs-survival-in-a-glioma-stem-cell-brain-tumor-model
#18
Shinya Haryu, Ryuta Saito, Wenting Jia, Takuhiro Shoji, Yui Mano, Aya Sato, Masayuki Kanamori, Yukihiko Sonoda, Oltea Sampetrean, Hideyuki Saya, Teiji Tominaga
Expression of CD44 in glioma cells was previously correlated with tumor grade and is considered a stem cell marker. CD44 stabilizes the cystine-glutamate transporter (xCT) and inhibits apoptosis in cancer stem cells (CSCs). Recently it was found that Sulfasalazine (SSZ), an anti-inflammatory drug, acts as an inhibitor of xCT and therefore has potential as a targeted therapy for CSCs. In this study, we tested an efficacy of SSZ against glioma stem cell model developed in rats. As poor penetration of blood-brain barrier resulted in insufficient efficacy of systemic SSZ treatment, SSZ was delivered locally with convection-enhanced delivery (CED)...
September 19, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28929029/association-of-rs1801157-single-nucleotide-polymorphism-of-cxcl12-gene-in-breast-cancer-in-pakistan-and-in-silico-expression-analysis-of-cxcl12-cxcr4-associated-biological-regulatory-network
#19
Samra Khalid, Rumeza Hanif
BACKGROUND: C-X-C chemokine ligand 12 (CXCL12) has important implications in breast cancer (BC) pathogenesis. It is selectively expressed on B and T lymphocytes and is involved in hematopoiesis, thymocyte trafficking, stem cell motility, neovascularization, and tumorigenesis. The single nucleotide polymorphism (SNP) rs1801157 of CXCL12 gene has been found to be associated with higher risk of BC. METHODS: Our study focuses on the genotypic and allelic distribution of SNP (rs1801157; G/A) in Pakistani population as well as its association with the clinico-pathological features...
2017: PeerJ
https://www.readbyqxmd.com/read/28928414/disruption-to-schizophrenia-associated-gene-fez1-in-the-hippocampus-of-hdac11-knockout-mice
#20
Dale T Bryant, Christian Landles, Aikaterini S Papadopoulou, Agnesska C Benjamin, Joshua K Duckworth, Thomas Rosahl, Caroline L Benn, Gillian P Bates
Histone Deacetylase 11 (HDAC11) is highly expressed in the central nervous system where it has been reported to have roles in neural differentiation. In contrast with previous studies showing nuclear and cytoplasmic localisation, we observed synaptic enrichment of HDAC11. Knockout mouse models for HDACs 1-9 have been important for guiding the development of isoform specific HDAC inhibitors as effective therapeutics. Given the close relationship between HDAC11 and neural cells in vitro, we examined neural tissue in a previously uncharacterised Hdac11 knockout mouse (Hdac11 (KO/KO))...
September 19, 2017: Scientific Reports
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