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https://www.readbyqxmd.com/read/28414399/current-understanding-of-the-health-effects-of-electromagnetic-fields
#1
Tayaba Miah, Deepak Kamat
There has been an exponential increase in the use of electronic devices over the past few decades. This has led to increased exposure to electromagnetic fields (EMF). Electric fields result from differences in voltage, whereas magnetic fields result from the flow of electric current. Higher-frequency waves of EMF have more energy than lower-frequency waves, and thus generally tend to be more harmful. An EMF activates cellular stress response and also causes breaks in DNA strands. There are many methodological barriers to effectively measuring the associations of EMF and childhood cancers...
April 1, 2017: Pediatric Annals
https://www.readbyqxmd.com/read/28397028/incidence-and-survival-trends-in-oligodendrogliomas-and-anaplastic-oligodendrogliomas-in-the-united-states-from-2000-to-2013-a-cbtrus-report
#2
Rebecca L Achey, Vishesh Khanna, Quinn T Ostrom, Carol Kruchko, Jill S Barnholtz-Sloan
Measuring tumor-specific trends in incidence is necessary to elucidate tumor-type contribution to overall cancer burden in the US population. Recently, there have been conflicting reports concerning the incidence of oligodendrogliomas (OD) and anaplastic oligodendrogliomas (AOD). Therefore, our goal was to examine trends in OD and AOD incidence and survival by age, gender and race. Data was analyzed from the Central Brain Tumor Registry of the United States (CBTRUS) from 2000 to 2013. Age-adjusted incidence rates per 100,000 person-years with 95% confidence intervals (CI) and annual percent changes (APCs) with 95% CI were calculated for OD and AOD by age, sex and race...
April 10, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28374184/brain-cancer-stem-cells-in-adults-and-children-cell-biology-and-therapeutic-implications
#3
REVIEW
Tamara J Abou-Antoun, James S Hale, Justin D Lathia, Stephen M Dombrowski
Brain tumors represent some of the most malignant cancers in both children and adults. Current treatment options target the majority of tumor cells but do not adequately target self-renewing cancer stem cells (CSCs). CSCs have been reported to resist the most aggressive radiation and chemotherapies, and give rise to recurrent, treatment-resistant secondary malignancies. With advancing technologies, we now have a better understanding of the genetic, epigenetic and molecular signatures and microenvironmental influences which are useful in distinguishing between distinctly different tumor subtypes...
April 3, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28345828/effects-of-a-self-encouragement-program-on-stress-of-mothers-of-children-with-cancer-referred-to-imam-ali-hospital-zahedan-in-2015
#4
Mahdieh Saljughi, Narges Sadeghi
Introduction: In addition to the physical problems for the patients themselves, cancer can cause several social and psychological problems to the family, especially the mother in pediatric cases. This study aimed to investigate the effects of a self-encouragement program on stress of mothers of children with cancer referred to Imam Ali Hospital of Zahedan in 2015. Materials and Methods: This case-control study was performed on 44 mothers with children suffering from cancer, referred to the hospital during October and November of 2015...
February 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28339108/very-high-energy-electron-vhee-beams-in-radiation-therapy-treatment-plan-comparison-between-vhee-vmat-and-ppbs
#5
Emil Schüler, Kjell Eriksson, Elin Hynning, Steven L Hancock, Susan M Hiniker, Magdalena Bazalova-Carter, Tony Wong, Quynh-Thu Le, Billy W Loo, Peter G Maxim
PURPOSE: The aim of this study was to evaluate the performance of very high energy electron beams (VHEE) beams in comparison to clinically derived treatment plans generated with volumetric modulated arc therapy (VMAT) and proton pencil beam scanning (PPBS) technology. We developed a custom optimization script that could be applied automatically across modalities to eliminate operator bias during IMRT optimization. METHODS: Four clinical cases were selected (prostate cancer, lung cancer, pediatric brain tumor, and head and neck cancer (HNC))...
March 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28338501/alk-expression-is-a-novel-marker-for-the-wnt-activated-type-of-pediatric-medulloblastoma-and-an-indicator-of-good-prognosis-for-patients
#6
Maria Łastowska, Joanna Trubicka, Magdalena Niemira, Paczkowska-Abdulsalam, Agnieszka Karkucińska-Więckowska, Magdalena Kaleta, Monika Drogosiewicz, Magdalena Tarasińska, Marta Perek-Polnik, Adam Krętowski, Bożenna Dembowska-Bagińska, Wiesława Grajkowska, Maciej Pronicki, Ewa Matyja
ALK gene rearrangements were identified in a variety of cancers, including neuroblastoma, where the presence of ALK expression is associated with adverse prognosis. ALK mutations have recently been found in the pediatric brain tumor medulloblastoma, and microarray data indicate that ALK is highly expressed in a subset of these tumors. Therefore, we investigated whether ALK expression correlates with transcriptional profiles and clinical features of medulloblastoma. Tumors from 116 medulloblastoma patients were studied at diagnosis for the detection of ALK expression at the RNA level by an application of NanoString technology and at the protein level by immunohistochemistry using antibody ALK clone D5F3...
March 23, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28333115/modeling-and-targeting-myc-genes-in-childhood-brain-tumors
#7
REVIEW
Sonja Hutter, Sara Bolin, Holger Weishaupt, Fredrik J Swartling
Brain tumors are the second most common group of childhood cancers, accounting for about 20%-25% of all pediatric tumors. Deregulated expression of the MYC family of transcription factors, particularly c-MYC and MYCN genes, has been found in many of these neoplasms, and their expression levels are often correlated with poor prognosis. Elevated c-MYC/MYCN initiates and drives tumorigenesis in many in vivo model systems of pediatric brain tumors. Therefore, inhibition of their oncogenic function is an attractive therapeutic target...
March 23, 2017: Genes
https://www.readbyqxmd.com/read/28325818/paper-of-note-in-science-translational-medicine9-381
#8
Leslie K Ferrarelli
This week's article describes a therapy that may enable macrophages to recognize and kill tumor cells in pediatric patients with brain cancer.
March 21, 2017: Science Signaling
https://www.readbyqxmd.com/read/28319448/rationale-and-design-of-a-phase-1-clinical-trial-to-evaluate-hsv-g207-alone-or-with-a-single-radiation-dose-in-children-with-progressive-or-recurrent-malignant-supratentorial-brain-tumors
#9
Alicia M Waters, James M Johnston, Alyssa T Reddy, John Fiveash, Avi Madan-Swain, Kara Kachurak, Asim K Bag, G Yancey Gillespie, James M Markert, Gregory K Friedman
Primary central nervous system tumors are the most common solid neoplasm of childhood and the leading cause of cancer-related death in pediatric patients. Survival rates for children with malignant supratentorial brain tumors are poor despite aggressive treatment with combinations of surgery, radiation, and chemotherapy, and survivors often suffer from damaging lifelong sequelae from current therapies. Novel innovative treatments are greatly needed. One promising new approach is the use of a genetically engineered, conditionally replicating herpes simplex virus (HSV) that has shown tumor-specific tropism and potential efficacy in the treatment of malignant brain tumors...
March 2017: Human Gene Therapy. Clinical Development
https://www.readbyqxmd.com/read/28292958/molecular-mechanisms-and-therapeutic-targets-in-pediatric-brain-tumors
#10
REVIEW
Kun-Wei Liu, Kristian W Pajtler, Barbara C Worst, Stefan M Pfister, Robert J Wechsler-Reya
Brain tumors are among the leading causes of cancer-related deaths in children. Although surgery, aggressive radiation, and chemotherapy have improved outcomes, many patients still die of their disease. Moreover, those who survive often suffer devastating long-term side effects from the therapies. A greater understanding of the molecular underpinnings of these diseases will drive the development of new therapeutic approaches. Advances in genomics and epigenomics have provided unprecedented insight into the molecular diversity of these diseases and, in several cases, have revealed key genes and signaling pathways that drive tumor growth...
March 14, 2017: Science Signaling
https://www.readbyqxmd.com/read/28285334/incidence-of-cns-tumors-in-appalachian-children
#11
Bin Huang, Alice Luo, Eric B Durbin, Ellen Lycan, Thomas Tucker, Quan Chen, Craig Horbinski, John L Villano
Determine whether the risk of astrocytomas in Appalachian children is higher than the national average. We compared the incidence of pediatric brain tumors in Appalachia versus non-Appalachia regions, covering years 2000-2011. The North American Association of Central Cancer Registries (NAACCR) collects population-based data from 55 cancer registries throughout U.S. and Canada. All invasive primary (i.e. non-metastatic tumors), with age at diagnosis 0-19 years old, were included. Nearly 27,000 and 2200 central nervous system (CNS) tumors from non-Appalachia and Appalachia, respectively comprise the cohorts...
March 11, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28260349/somatic-structural-variations-in-pediatric-brain-tumors-an-update
#12
Zhengwei Li, Qingzeng Sun, Yingchun Shi
Pediatrics brain tumours are the second most frequent malignancy in children, and the most common cause of cancer-related deaths in both the 0-14-year and the 15-24-year age group. Although, pediatrics high-grade glioma (pHGG) is a histologically similar tumour to that arising in adults, these are distinct biological diseases, differing in copy number profiles and driver genetic alterations. Recent sequencing initiatives have conclusively shown the existence of subgroups of HGG marked by distinct driver mutations, which are significantly enriched in young children (H3F3A K27M), teenagers and young adults (H3F3A G34R/V), and middle- aged adults (IDH1/2)...
March 3, 2017: Minerva Pediatrica
https://www.readbyqxmd.com/read/28253733/rationale-and-design-of-a-phase-i-clinical-trial-to-evaluate-hsv-g207-alone-or-with-a-single-radiation-dose-in-children-with-progressive-or-recurrent-malignant-supratentorial-brain-tumors
#13
Alicia M Waters, James M Johnston, Alyssa T Reddy, John Fiveash, Avi Madan-Swain, Kara Kachurak, Asim K Bag, G Yancey Gillespie, James M Markert, Gregory K Friedman
Primary central nervous system tumors are the most common solid neoplasm of childhood and the leading cause of cancer related death in pediatric patients. Survival rates for children with malignant supratentorial brain tumors are poor despite aggressive treatment with combinations of surgery, radiation, and chemotherapy; and survivors often suffer from damaging lifelong sequelae from current therapies. Novel innovative treatments are greatly needed. One promising new approach is the use of a genetically engineered, conditionally replicating herpes simplex virus (HSV) that has shown tumor specific tropism and potential efficacy in the treatment of malignant brain tumors...
February 24, 2017: Human Gene Therapy. Clinical Development
https://www.readbyqxmd.com/read/28248691/prospective-evaluation-of-postural-control-and-gait-in-pediatric-patients-with-cancer-after-a-4-week-inpatient-rehabilitation-program
#14
Carsten Müller, Dieter Rosenbaum, Konstantin A Krauth
OBJECTIVE: The aim of the study was to investigate the effects of a 4-wk inpatient rehabilitation program on postural control and gait in pediatric patients with cancer. DESIGN: Eighty-eight patients with brain tumors (n = 59) and bone/soft tissue sarcomas (n = 29) were evaluated. Postural control was assessed examining the velocity of the center of pressure and single-leg stance time on a pressure distribution platform. Walk ratio, a measure of neuromotor control, was used to evaluate intervention effects on gait...
February 28, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28248256/integrated-proteomic-and-transcriptomic-based-approaches-to-identifying-signature-biomarkers-and-pathways-for-elucidation-of-daoy-and-uw228-subtypes
#15
Roger Higdon, Jessie Kala, Devan Wilkins, Julia Fangfei Yan, Manveen K Sethi, Liang Lin, Siqi Liu, Elizabeth Montague, Imre Janko, John Choiniere, Natali Kolker, William S Hancock, Eugene Kolker, Susan Fanayan
Medulloblastoma (MB) is the most common malignant pediatric brain tumor. Patient survival has remained largely the same for the past 20 years, with therapies causing significant health, cognitive, behavioral and developmental complications for those who survive the tumor. In this study, we profiled the total transcriptome and proteome of two established MB cell lines, Daoy and UW228, using high-throughput RNA sequencing (RNA-Seq) and label-free nano-LC-MS/MS-based quantitative proteomics, coupled with advanced pathway analysis...
February 3, 2017: Proteomes
https://www.readbyqxmd.com/read/28245795/in-search-of-druggable-targets-for-gbm-amino-acid-metabolism
#16
Eduard H Panosyan, Henry J Lin, Jan Koster, Joseph L Lasky
BACKGROUND: Amino acid (AA) pathways may contain druggable targets for glioblastoma (GBM). Literature reviews and GBM database ( http://r2.amc.nl ) analyses were carried out to screen for such targets among 95 AA related enzymes. METHODS: First, we identified the genes that were differentially expressed in GBMs (3 datasets) compared to non-GBM brain tissues (5 datasets), or were associated with survival differences. Further, protein expression for these enzymes was also analyzed in high grade gliomas (HGGs) (proteinatlas...
February 28, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28218785/inhibition-of-shh-pathway-mechanisms-by-arsenic-trioxide-in-pediatric-medulloblastomas-a-comprehensive-literature-review
#17
REVIEW
P H S Klinger, A F Andrade, L E A Delsin, R G P Queiroz, C A Scrideli, L G Tone, E T Valera
Recent innovations in the genomic understanding of medulloblastomas have provided new ways to explore this highly invasive malignant brain cancer arising from the cerebellum. Among the four different medulloblastoma subgroups described to date, the sonic hedgehog (SHH) genetic pathway is the pathway activated in the tumorigenesis of medulloblastoma. SHH-related medulloblastomas are usually of nodular/desmoplastic histology and frequently occur in children under the age of three, an age group highly susceptible to the acute and long-term effects of treatment...
February 16, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28214639/congenital-glioblastoma-with-distinct-clinical-and-molecular-characteristics-case-reports-and-a-literature-review
#18
Masahiro Kameda, Yoshihiro Otani, Tomotsugu Ichikawa, Akira Shimada, Koichi Ichimura, Isao Date
BACKGROUND: The molecular diagnosis of brain tumors is important in classifying tumors and determining appropriate treatment. Congenital glioblastoma multiforme (GBM) is a rare tumor that occurs in infants, and the prognosis is poor. Approximately 60 patients diagnosed with congenital GBM have been reported. However, few reports have conducted molecular analyses of congenital GBM. CASE DESCRIPTION: We describe 2 congenital GBM patients treated in our hospital, and report results of immunohistochemistry, fluorescent in situ hybridization (FISH), direct sequencing, and methylation analyses...
February 16, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28213356/otx2-activity-at-distal-regulatory-elements-shapes-the-chromatin-landscape-of-group-3-medulloblastoma
#19
Gaylor Boulay, Mary E Awad, Nicolo Riggi, Tenley C Archer, Sowmya Iyer, Wannaporn E Boonseng, Nikki E Rossetti, Beverly Naigles, Shruthi Rengarajan, Angela Volorio, James C Kim, Jill P Mesirov, Pablo Tamayo, Scott L Pomeroy, Martin J Aryee, Miguel N Rivera
Medulloblastoma is the most frequent malignant pediatric brain tumor and is divided into at least four subgroups known as WNT, SHH, Group 3, and Group 4. Here, we characterized gene regulation mechanisms in the most aggressive subtype, Group 3 tumors, through genome-wide chromatin and expression profiling. Our results show that most active distal sites in these tumors are occupied by the transcription factor OTX2. Highly active OTX2-bound enhancers are often arranged as clusters of adjacent peaks and are also bound by the transcription factor NEUROD1...
March 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28186969/high-oct4a-levels-drive-tumorigenicity-and-metastatic-potential-of-medulloblastoma-cells
#20
Patrícia Benites Gonçalves da Silva, Márcia Cristina Teixeira Dos Santos, Carolina Oliveira Rodini, Carolini Kaid, Márcia Cristina Leite Pereira, Gabriela Furukawa, Daniel Sanzio Gimenes da Cruz, Mauricio Barbugiani Goldfeder, Clarissa Ribeiro Reily Rocha, Carla Rosenberg, Oswaldo Keith Okamoto
Medulloblastoma is a highly aggressive pediatric brain tumor, in which sporadic expression of the pluripotency factor OCT4 has been recently correlated with poor patient survival. However the contribution of specific OCT4 isoforms to tumor aggressiveness is still poorly understood. Here, we report that medulloblastoma cells stably overexpressing the OCT4A isoform displayed enhanced clonogenic, tumorsphere generation, and invasion capabilities. Moreover, in an orthotopic metastatic model of medulloblastoma, OCT4A overexpressing cells generated more developed, aggressive and infiltrative tumors, with tumor-bearing mice attaining advanced metastatic disease and shorter survival rates...
March 21, 2017: Oncotarget
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