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Neuroblastoma

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https://www.readbyqxmd.com/read/28224327/effects-of-in-vivo-and-in-vitro-administration-of-neuro-behcet-s-disease-igg
#1
Ece Erdağ, Ceren Şahin, Cem İsmail Küçükali, Sinem Bireller, Melike Küçükerden, Murat Kürtüncü, Recai Türkoğlu, Bedia Cakmakoglu, Erdem Tüzün, Feyza Arıcıoğlu
Antibodies directed against membrane antigens of neuronal axonal processes (neuropil) have been recently identified in neuro-Behcet's disease (NBD) patients. To delineate the potential pathogenic action of these antibodies, pooled sera from seven NBD patients with neuropil antibodies and seven healthy controls were divided into purified IgG and IgG-depleted serum (IgG-DS) fractions and each fraction was administered into lateral ventricles of rats. NBD IgG-injected rats showed reduced locomotor activity in the open field test as compared to NBD IgG-DS, healthy control IgG, healthy control IgG-DS and PBS injected rats (n = 10 for each group)...
February 21, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28223827/common-variations-within-hace1-gene-and-neuroblastoma-susceptibility-in-a-southern-chinese-population
#2
Zhuorong Zhang, Ruizhong Zhang, Jinhong Zhu, Fenghua Wang, Tianyou Yang, Yan Zou, Jing He, Huimin Xia
Neuroblastoma is a common fatal pediatric cancer of the developing sympathetic nervous system, which accounts for ~10% of all pediatric cancer deaths. To investigate genetic risk factors related to neuroblastoma, many genome-wide association studies have been performed, and single nucleotide polymorphisms (SNPs) within HACE1 gene have been identified to associate with neuroblastoma risk. However, the association of the HACE1 SNPs with neuroblastoma needs to be validated in Southern Chinese children. We genotyped five SNPs located in the HACE1 gene (rs4336470 C>T, rs9404576 T>G, rs4079063 A>G, rs2499663 T>C, and rs2499667 A>G) in 256 Southern Chinese patients in comparison with 531 ethnically matched healthy controls...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28223126/targeted-inhibition-of-hdac8-increases-the-doxorubicin-sensitivity-of-neuroblastoma-cells-via-up-regulation-of-mir-137
#3
Gang Zhao, Guoliang Wang, Hongmin Bai, Tiandong Li, Fanghe Gong, Huan Yang, Jinchong Wen, Weimin Wang
Histone deacetylases (HDACs) have been suggested to be potential therapeutic targets for cancer treatment. Recent studies revealed that HDAC8 expression was associated with poor prognostic markers and poor overall survival rate of neuroblastoma (NB). Our present study revealed that among the four members of class I HDACs, HDAC8 is significantly over expressed in NB cells as compared with the normal fibroblast 3T3 cells or primary normal human astrocytes (NHA) cells. Targeted inhibition of HDAC8 by its specific siRNA (si-HDAC8) can inhibit the in vitro growth of NB cells...
February 18, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28220846/cmt-linked-loss-of-function-mutations-in-gdap1-impair-store-operated-ca-2-entry-stimulated-respiration
#4
Paloma González-Sánchez, David Pla-Martín, Paula Martínez-Valero, Carlos B Rueda, Eduardo Calpena, Araceli Del Arco, Francesc Palau, Jorgina Satrústegui
GDAP1 is an outer mitochondrial membrane protein involved in Charcot-Marie-Tooth (CMT) disease. Lack of GDAP1 gives rise to altered mitochondrial networks and endoplasmic reticulum (ER)-mitochondrial interactions resulting in a decreased ER-Ca(2+) levels along with a defect on store-operated calcium entry (SOCE) related to a misallocation of mitochondria to subplasmalemmal sites. The defect on SOCE is mimicked by MCU silencing or mitochondrial depolarization, which prevent mitochondrial calcium uptake. Ca(2+) release from de ER and Ca(2+) inflow through SOCE in neuroblastoma cells result in a Ca(2+)-dependent upregulation of respiration which is blunted in GDAP1 silenced cells...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28219718/a-novel-regulatory-role-of-rgs4-in-stat5b-activation-neurite-outgrowth-and-neuronal-differentiation
#5
Paschalina Pallaki, Eirini-Maria Georganta, Ioannis Serafimidis, Maria-Pagona Papakonstantinou, Vassilis Papanikolaou, Sofia Koutloglou, Elsa Papadimitriou, Adamantia Agalou, Aggeliki Tserga, Alexandra Simeonof, Dimitra Thomaidou, Maria Gaitanou, Zafiroula Georgoussi
The Regulator of G protein Signalling 4 (RGS4) is a multitask protein that interacts with and negatively modulates opioid receptor signalling. Previously, we showed that the δ-opioid receptor (δ-OR) forms a multiprotein signalling complex consisting of Gi/Go proteins and the Signal Transducer and Activator of Transcription 5B (STAT5B) that leads to neuronal differentiation and neurite outgrowth upon δ-ΟR activation. Here, we investigated whether RGS4 could participate in signalling pathways to regulate neurotropic events...
February 17, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28217170/neuroblastoma-presenting-as-opsoclonus-myoclonus-a-series-of-six-cases-and-review-of-literature
#6
Jagdish P Meena, Rachna Seth, Biswaroop Chakrabarty, Sheffali Gulati, Sandeep Agrawala, Priyanka Naranje
The opsoclonus-myoclonus ataxia syndrome (OMAS) also called "Kinsbourne syndrome" or "dancing eye syndrome" is a rare but serious disorder characterized by opsoclonus, myoclonus, and ataxia, along with extreme irritability and behavioural changes. Data on its epidemiology, clinical features, and outcome are limited worldwide. The aim of the study was to evaluate the clinical profile and outcome of children with OMAS. A retrospective data of all children presented to Pediatric oncology clinic with a diagnosis of opsoclonus-myoclonus from 2013 to 2016 were collected...
October 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28216878/nardostachys-jatamansi-root-extract-modulates-the-growth-of-imr-32-and-sk-n-mc-neuroblastoma-cell-lines-through-mycn-mediated-regulation-of-mdm2-and-p53
#7
Snehal Suryavanshi, Prerna Raina, Rashmi Deshpande, Ruchika Kaul-Ghanekar
AIM: The present study evaluated the effect of ethanolic extract of Nardostachys jatamansi roots (NJet) on MYCN mediated regulation of expression of MDM2 and p53 proteins in neuroblastoma cell lines, IMR-32 and SK-N-MC. MATERIALS AND METHODS: The effect of NJet on cell viability was determined by MTT; and on growth kinetics was evaluated by trypan blue dye exclusion method and soft agar assay. The expression of p53, MDM2 and MYCN proteins in response to NJet treatment was evaluated by immunoblotting...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28216621/dual-anti-ischemic-effects-of-rosmarinic-acid-n-butyl-ester-via-alleviation-of-dapk-p53-mediated-neuronal-damage-and-microglial-inflammation
#8
Lei Wu, Hong-Min Wang, Jin-Long Li, Hong-Xuan Feng, Wei-Min Zhao, Hai-Yan Zhang
The discovery of efficacious anti-ischemic drugs remains a challenge. Recently we have found that rosmarinic acid n-butyl ester (RABE), a derivative of rosmarinic acid, significantly protects SH-SY5Y cells against oxygen glucose deprivation (OGD)-induced cell death. In the present study we simultaneously investigated the effects of RABE on the two key players in the pathophysiology of cerebral ischemia, ischemic neuronal damage and microglial inflammation. Pretreatment with RABE (1, 10 μmol/L) dose-dependently attenuated OGD- or H2O2-induced reduction of the viability of SH-SY5Y neuroblastoma cells...
February 20, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28216044/radiolabeling-and-initial-biological-evaluation-of-18-f-kbm-1-for-imaging-rar-%C3%AE-receptors-in-neuroblastoma
#9
Kiran Kumar Solingapuram Sai, Bhaskar C Das, Anirudh Sattiraju, Frankis G Almaguel, Suzanne Craft, Akiva Mintz
Retinoic acid receptor alpha (RAR-α) plays a significant role in a number of diseases, including neuroblastoma. Children diagnosed with high-risk neuroblastoma are treated13-cis-retinoic acid, which reduces risk of cancer recurrence. Neuroblastoma cell death is mediated via RAR-α, and expression of RAR-α is upregulated after treatment. A molecular imaging probe that binds RAR-α will help clinicians to diagnose and stratify risk for patients with neuroblastoma, who could benefit from retinoid-based therapy...
February 1, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28214999/e6-associated-protein-dependent-estrogen-receptor-regulation-of-protein-kinase-a-regulatory-subunit-r2a-expression-in-neuroblastoma
#10
Jean-Pierre Obeid, Youssef H Zeidan, Nawal Zafar, Jimmy El Hokayem
E6ap is a known transcriptional coregulator for estrogen receptor alpha (Er, Erα) in the presence of estrogen. Protein kinase A (PKA) contains two regulatory subunits derived from four genes. Recent evidence demonstrates that PKA regulates E6ap activity. Data generated in our lab indicated estrogen dependent regulation of Pkar2a levels. Our project sets to investigate a possible feedback mechanism constituting of Erα and E6ap transcriptional regulation of Pkar2a expression. Western blot evaluated protein regulation correlations with E2 in mouse neuroblastoma lines...
February 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28214660/enhancer-of-zeste-homologue-2-plays-an-important-role-in-neuroblastoma-cell-survival-independent-of-its-histone-methyltransferase-activity
#11
Laurel T Bate-Eya, Hinco J Gierman, Marli E Ebus, Jan Koster, Huib N Caron, Rogier Versteeg, M Emmy M Dolman, Jan J Molenaar
Neuroblastoma is predominantly characterised by chromosomal rearrangements. Next to V-Myc Avian Myelocytomatosis Viral Oncogene Neuroblastoma Derived Homolog (MYCN) amplification, chromosome 7 and 17q gains are frequently observed. We identified a neuroblastoma patient with a regional 7q36 gain, encompassing the enhancer of zeste homologue 2 (EZH2) gene. EZH2 is the histone methyltransferase of lysine 27 of histone H3 (H3K27me3) that forms the catalytic subunit of the polycomb repressive complex 2. H3K27me3 is commonly associated with the silencing of genes involved in cellular processes such as cell cycle regulation, cellular differentiation and cancer...
February 16, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28214632/synthesis-of-new-heterocyclic-compounds-based-on-pyrazolopyridine-scaffold-and-evaluation-of-their-neuroprotective-potential-in-mpp-induced-neurodegeneration
#12
Jabrane Jouha, Mohammed Loubidi, Jamila Bouali, Salha Hamri, Abderrafia Hafid, Franck Suzenet, Gérald Guillaumet, Taner Dagcı, Mostafa Khouili, Fadime Aydın, Luciano Saso, Güliz Armagan
Neurodegenerative disorders including Alzheimer's disease, Parkinson's disease, and Huntington's disease affect millions of people in the world. Thus several new approaches to treat brain disorders are under development. The aim of the present study is to synthesize potential neuroprotective heterocyclic compounds based on pyrazolopyridine derivatives and then to evaluate their effects in MPP(+)-induced neurodegeneration in human neuroblastoma cell line (SH-SY5Y cells). The effects of the compounds on cell viability were measured by MTT assay and the changes in apoptosis-related proteins including bax, Bcl-2, Bcl-xl and caspase-3 were investigated by western blot technique...
February 11, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28212331/analysis-of-epidermal-growth-factor-receptor-related-gene-expression-changes-in-a-cellular-and-animal-model-of-parkinson-s-disease
#13
In-Su Kim, Sushruta Koppula, Shin-Young Park, Dong-Kug Choi
We employed transcriptome analysis of epidermal growth factor receptor related gene expression changes in cellular and animal models of Parkinson's disease (PD). We used a well-known Parkinsonian toxin 1-methyl-4-phenylpyridine (MPP⁺) to induce neuronal apoptosis in the human neuroblastoma SH-SY5Y cell line. The MPP⁺-treatment of SH-SY5Y cells was capable of inducing neuro-apoptosis, but it remains unclear what kinds of transcriptional genes are affected by MPP⁺ toxicity. Therefore the pathways that were significantly perturbed in MPP⁺ treated human neuroblastoma SH-SY5Y cells were identified based on genome-wide gene expression data at two time points (24 and 48 h)...
February 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28209620/the-histone-methyltransferase-dot1l-promotes-neuroblastoma-by-regulating-gene-transcription
#14
Matthew Wong, Andrew El Tee, Giorgio Milazzo, Jessica L Bell, Rebecca C Poulos, Bernard Atmadibrata, Yuting Sun, Duohui Jing, Nicholas Ho, Dora Ling, Pei Yan Liu, Xu Dong Zhang, Stefan Hüttelmaier, Jason W H Wong, Jenny Wang, Patsie Polly, Giovanni Perini, Christopher J Scarlett, Tao Liu
Myc oncoproteins exert tumorigenic effects by regulating expression of target oncogenes. Histone H3 lysine 79 (H3K79) methylation at Myc-responsive elements of target gene promoters is a strict prerequisite for Myc-induced transcriptional activation, and DOT1L is the only known histone methyltransferase that catalyses H3K79 methylation. Here we show that N-Myc upregulatsd DOT1L mRNA and protein expression by binding to the DOT1L gene promoter. shRNA-mediated depletion of DOT1L reduced mRNA and protein expression of N-Myc target genes ODC1 and E2F2...
February 16, 2017: Cancer Research
https://www.readbyqxmd.com/read/28208865/adult-neuroblastoma-case-report-and-literature-review
#15
Vishwapriya Mahadev Godkhindi, Maheboob M Basade, Kamran Khan, Kiran Thorat
Neuroblastoma is the most common solid malignant neoplasm in the paediatric age group; accounting for 7% of all childhood malignancies, but neuroblastoma in adult, is a rare occurrence, finding mention in aeons of medical literature with an overall incidence of 1 in 10 million adults/year. We report the case of a 24-year-old male patient presenting with the complaints of progressive abdominal distention of 2 months duration. Multiple Detector Computed Tomography (MD-CT) of abdomen revealed a huge enhancing mass in the retroperitoneum abutting the left kidney, and a subsequent CT-guided biopsy and immunohistochemistry confirmed the diagnosis of ganglioneuroblastoma...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28206967/calcium-regulatory-proteins-as-modulators-of-chemotherapy-in-human-neuroblastoma
#16
Ana-Maria Florea, Elizabeth Varghese, Jennifer E McCallum, Safa Mahgoub, Irfan Helmy, Sharon Varghese, Neha Gopinath, Steffen Sass, Fabian J Theis, Guido Reifenberger, Dietrich Büsselberg
Neuroblastoma (NB) is a pediatric cancer treated with poly-chemotherapy including platinum complexes (e.g. cisplatin (CDDP), carboplatin), DNA alkylating agents, and topoisomerase I inhibitors (e.g. topotecan (TOPO)). Despite aggressive treatment, NB may become resistant to chemotherapy. We investigated whether CDDP and TOPO treatment of NB cells interacts with the expression and function of proteins involved in regulating calcium signaling. Human neuroblastoma cell lines SH-SY5Y, IMR-32 and NLF were used to investigate the effects of CDDP and TOPO on cell viability, apoptosis, calcium homeostasis, and expression of selected proteins regulating intracellular calcium concentration ([Ca2+]i)...
February 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28204825/morroniside-protects-sk-n-sh-human-neuroblastoma-cells-against-h2o2-induced-damage
#17
Jing-Xing Zhang, Rui Wang, Jin Xi, Lin Shen, An-You Zhu, Qi Qi, Qi-Yi Wang, Lun-Jun Zhang, Feng-Chao Wang, He-Zuo Lü, Jian-Guo Hu
Oxidative stress-induced cell injury has been linked to the pathogenesis of neurodegenerative disorders such as spinal cord injury, Parkinson's disease, and multiple sclerosis. Morroniside is an antioxidant derived from the Chinese herb Shan-Zhu-Yu. The present study investigated the neuroprotective effect of morroniside against hydrogen peroxide (H2O2)-induced cell death in SK-N-SH human neuroblastoma cells. H2O2 increased cell apoptosis, as determined by flow cytometry and Hoechst 33342 staining. This effect was reversed by pretreatment with morroniside at concentrations of 1-100 µM...
March 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28197362/prognostic-impact-of-the-expression-of-ncr1-and-ncr3-nk-cell-receptors-and-pd-l1-on-advanced-non-small-cell-lung-cancer
#18
Laetitia Fend, Sylvie Rusakiewicz, Julien Adam, Bérangère Bastien, Anne Caignard, Meriem Messaoudene, Christina Iribarren, Isabelle Cremer, Aurélien Marabelle, Christophe Borg, Michaela Semeraro, Luc Barraud, Jean-Marc Limacher, Alexander Eggermont, Guido Kroemer, Laurence Zitvogel
The putative contribution of natural killer (NK) cells to immunosurveillance in non-small cell lung cancer (NSCLC) has been an ongoing conundrum. Here, we used a readily standardizable quantitative real time polymerase chain reaction (qRT-PCR) to measure the expression of NK cell receptors in total peripheral blood mononuclear cells (PBMC) from healthy volunteers (HV), patients with gastrointestinal stromal tumors (GIST), neuroblastoma (NB), melanoma or NSCLC. We quantified NCR1 (which codes for NKp46) and NCR3 (which codes for NKp30), as well as that of three NCR3 splice variants (which give rise to immunostimulatory NKp30A and NKp30B, as well as to immunosuppressive NKp30C)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28197071/chemosensitivity-of-u251-cells-to-the-co-treatment-of-d-penicillamine-and-copper-possible-implications-on-wilson-disease-patients
#19
Meghri Katerji, Kassem Barada, Mustapha Jomaa, Firas Kobeissy, Ahmad-Kareem Makkawi, Wassim Abou-Kheir, Julnar Usta
D-Penicillamine (PA), a copper chelator, and one of the recommended drugs for treatment of Wilson disease (WD) has been reported to worsen the symptoms of patients with neurologic presentations. However, the cause of this paradoxical response has not been fully elucidated and requires further investigations. Accordingly, we have studied the in vitro effect of Copper (Cu) and/or PA treatment on human glioblastoma U251 cells as an in vitro model of Cu cytotoxicity. Treatment of U251 cells with either Cu or PA exerted no significant effect on their morphology, viability or ROS level...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28195906/prominent-pulmonary-metastases-without-concurrent-osseous-involvement-in-patients-with-high-risk-neuroblastoma
#20
Xia Bai, Hongming Zhuang
Metastases from high-risk neuroblastomas generally are to the bone or bone marrow. Multiple lung metastases are rare, especially when there was no concurrent osseous metastasis. We report 2 cases of high-risk neuroblastomas having prominent lung metastases without concurrent osseous lesion observed.
February 13, 2017: Clinical Nuclear Medicine
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