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Pediatric brain cancer

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https://www.readbyqxmd.com/read/28521298/insulin-like-growth-factor-2-axis-supports-the-serum-independent-growth-of-malignant-rhabdoid-tumor-and-is-activated-by-microenvironment-stress
#1
Ting Li, Jin Wang, Pengfei Liu, Jiadong Chi, Han Yan, Lei Lei, Zexing Li, Bing Yang, Xi Wang
Malignant rhabdoid tumors (MRTs) are rare, lethal, pediatric tumors predominantly found in the kidney, brain and soft tissues. MRTs are driven by loss of tumor suppressor SNF5/INI1/SMARCB1/BAF47. The prognosis of MRT is poor using currently available treatments, so new treatment targets need to be identified to expand treatment options for patients experiencing chemotherapy resistance. The growth hormone insulin-like growth factor 2 (IGF2) signaling pathway is a promising target to overcome drug resistance in many cancers...
May 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28510691/nf-%C3%AE%C2%BAb-upregulation-through-epigenetic-silencing-of-ldoc1-drives-tumor-biology-and-specific-immunophenotype-in-group-a-ependymoma
#2
Andrea M Griesinger, Davis A Witt, Sydney T Grob, Sabrina R Georgio Westover, Andrew M Donson, Bridget Sanford, Jean M Mulcahy Levy, Randall Wong, Daniel C Moreira, John A DeSisto, Ilango Balakrishnan, Lindsey M Hoffman, Michael H Handler, Kenneth L Jones, Rajeev Vibhakar, Sujatha Venkataraman, Nicholas K Foreman
Background.: Inflammation has been identified as a hallmark of high-risk Group A (GpA) ependymoma (EPN). Chronic interleukin (IL)-6 secretion from GpA tumors drives an immune suppressive phenotype by polarizing infiltrating monocytes. This study determines the mechanism by which IL-6 is dysregulated in GpA EPN. Methods.: Twenty pediatric GpA and 21 pediatric Group B (GpB) EPN had gene set enrichment analysis for MSigDB Hallmark gene sets performed. Protein and RNA from patients and cell lines were used to validate transcriptomic findings...
May 16, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28495911/intratumoral-injection-of-hsv1716-an-oncolytic-herpes-virus-is-safe-and-shows-evidence-of-immune-response-and-viral-replication-in-young-cancer-patients
#3
Keri A Streby, James I Geller, Mark A Currier, Patrick S Warren, John M Racadio, Alexander J Towbin, Michele R Vaughan, Melinda Triplet, Kristy Ott-Napier, Devon J Dishman, Lori R Backus, Beth Stockman, Marianne Brunner, Kathleen Simpson, Robert Spavin, Joe Conner, Timothy P Cripe
Purpose: HSV1716 is an oncolytic herpes simplex virus-1 (HSV-1) studied in adults via injection into the brain and superficial tumors. To determine the safety of administering HSV1716 to pediatric patients with cancer, we conducted a phase I trial of image-guided injection in young patients with relapsed or refractory extracranial cancers.Experimental Design: We delivered a single dose of 10(5) to 10(7) infectious units of HSV1716 via computed tomography-guided intratumoral injection and measured tumor responses by imaging...
May 11, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28486100/using-epigenetic-reprogramming-to-treat-pediatric-brain-cancer
#4
Milan G Chheda, David H Gutmann
In this issue of Cancer Cell, Nagaraja et al. dissect the molecular mechanisms underlying therapeutic responses to transcriptional disruptors in the fatal pediatric brain tumor, diffuse intrinsic pontine glioma (DIPG). Moreover, they identify super-enhancers mediating these effects, highlighting how normal brain developmental programs can be hijacked in cancer.
May 8, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28485351/pediatric-brain-tumors-an-analysis-of-5-years-of-data-from-a-tertiary-cancer-care-center-india
#5
R Madhavan, B P Kannabiran, A M Nithya, J Kani, P Balasubramaniam, S Shanmugakumar
BACKGROUND: Pediatric brain tumors are the most common solid tumors in children and a leading cause of mortality and morbidity in children worldwide. Even though there are enough data about the epidemiology of pediatric brain tumors in western population, there are only a few reports from developing countries like India. AIMS: To study the epidemiological patterns of brain tumors in children, to study the patterns of care, and to assess the treatment response. MATERIALS AND METHODS: A retrospective epidemiological approach is used...
October 2016: Indian Journal of Cancer
https://www.readbyqxmd.com/read/28481580/neurocognitive-deficits-in-children-with-chronic-health-conditions
#6
Bruce E Compas, Sarah S Jaser, Kristen Reeslund, Niral Patel, Janet Yarboi
Over 4 million children in the United States suffer from chronic health conditions, including cancer, sickle cell disease, and diabetes. Because of major advances in the early identification and treatment of these conditions, survival rates for these children continue to rise, and the majority now lives into adulthood. However, increases in survival have come with costs related to long-term effects of disease processes and treatments. Foremost among these consequences is impairment in brain development and neurocognitive function that may affect a substantial portion of children with chronic health conditions and follow many into adulthood...
May 2017: American Psychologist
https://www.readbyqxmd.com/read/28474256/pediatric-imaging-in-dicer1-syndrome
#7
Marta Tijerin Bueno, Claudia Martínez-Ríos, Alejandro De la Puente Gregorio, Rayan A Ahyad, Anita Villani, Harriet Druker, Kalene van Engelen, Bailey Gallinger, Laura Aronoff, Ronald Grant, David Malkin, Mary-Louise C Greer
BACKGROUND: DICER1 syndrome, arising from a mutation in the DICER1 gene mapped to chromosome 14q32, is associated with an increased risk of a range of benign and malignant neoplasms. OBJECTIVE: To determine the spectrum of abnormalities and imaging characteristics in patients with DICER1 syndrome at a tertiary pediatric hospital. MATERIALS AND METHODS: This retrospective analysis evaluated imaging in patients ≤18 years with DICER1 germline variants between January 2004 and July 2016...
May 4, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28469330/profile-of-primary-pediatric-brain-and-spinal-cord-tumors-from-north-india
#8
Nadia Shirazi, Meenu Gupta, Nowneet Kumar Bhat, Braham Prakash Kalra, Ranjit Kumar, Manju Saini
BACKGROUND AND OBJECTIVE: The study was carried out to find the profile of pediatric brain and spinal cord tumors during 2006-2015 in a tertiary referral center of North India. MATERIALS AND METHODS: It was a retrospective medical record-based observational study. All children <18 years of age with confirmed histopathological diagnosis of cancer were included in the study. RESULTS: Central nervous system (CNS) tumors constituted 5.6% of all pediatric solid malignancies in our hospital...
January 2017: Indian Journal of Medical and Paediatric Oncology
https://www.readbyqxmd.com/read/28457820/differential-roles-for-akt-and-mtorc1-in-the-hypertrophy-of-pten-mutant-neurons-a-cellular-model-of-brain-overgrowth-disorders
#9
Ina Nikolaeva, Tatiana M Kazdoba, Beth Crowell, Gabriella D'Arcangelo
Mutations in the PI3K/Akt/mTOR signaling pathway or in the upstream negative regulator Pten cause human brain overgrowth disorders, such as focal cortical dysplasia and megalencephaly, and are characterized by the presence of hypertrophic neurons. These disorders often have a pediatric onset and a high comorbidity with drug-resistant epilepsy; however, effective pharmacological treatments are lacking. We established forebrain excitatory neuron-specific Pten-deficient cultures as an in vitro model of brain overgrowth disorders, and investigated the effects of this Pten mutation on PI3K/Akt/mTOR signaling and neuronal growth...
April 27, 2017: Neuroscience
https://www.readbyqxmd.com/read/28455399/drug-blocks-synaptic-hijacking-in-gliomas
#10
(no author information available yet)
An enzyme called ADAM10 cleaves a protein found in synaptic membranes, creating a soluble factor that can fuel the growth of brain tumors. Blocking this enzyme shrinks tumors in xenograft models of pediatric glioblastoma and diffuse intrinsic pontine glioma, two brain cancers with few to no effective drug options, researchers reported at the American Academy of Neurology 2017 Annual Meeting.
April 28, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28453743/targeted-next-generation-sequencing-of-pediatric-neuro-oncology-patients-improves-diagnosis-identifies-pathogenic-germline-mutations-and-directs-targeted-therapy
#11
Cassie N Kline, Nancy M Joseph, James P Grenert, Jessica van Ziffle, Eric Talevich, Courtney Onodera, Mariam Aboian, Soonmee Cha, David R Raleigh, Steve Braunstein, Joseph Torkildson, David Samuel, Michelle Bloomer, Alejandra G de Alba Campomanes, Anuradha Banerjee, Nicholas Butowski, Corey Raffel, Tarik Tihan, Andrew W Bollen, Joanna J Phillips, W Michael Korn, Iwei Yeh, Boris C Bastian, Nalin Gupta, Sabine Mueller, Arie Perry, Theodore Nicolaides, David A Solomon
Background.: Molecular profiling is revolutionizing cancer diagnostics and leading to personalized therapeutic approaches. Herein we describe our clinical experience performing targeted sequencing for 31 pediatric neuro-oncology patients. Methods.: We sequenced 510 cancer-associated genes from tumor and peripheral blood to identify germline and somatic mutations, structural variants, and copy number changes. Results.: Genomic profiling was performed on 31 patients with tumors including 11 high-grade gliomas, 8 medulloblastomas, 6 low-grade gliomas, 1 embryonal tumor with multilayered rosettes, 1 pineoblastoma, 1 uveal ganglioneuroma, 1 choroid plexus carcinoma, 1 chordoma, and 1 high-grade neuroepithelial tumor...
May 1, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28450183/hematopoietic-stem-cell-transplant-activity-in-pediatric-cancer-between-2008-and-2014-in-the-united-states-a-cibmtr-report
#12
Pooja Khandelwal, Heather R Millard, Elizabeth Thiel, Hisham Abdel-Azim, Allistair A Abraham, Jeffery J Auletta, Farid Boulad, Valerie I Brown, Bruce M Camitta, Ka Wah Chan, Sonali Chaudhury, Morton J Cowan, Miguel Angel-Diaz, Shahinaz M Gadalla, Robert Peter Gale, Gregory Hale, Kimberly A Kasow, Amy K Keating, Carrie L Kitko, Margaret L MacMillan, Richard F Olsson, Kristin M Page, Adriana Seber, Angela R Smith, Anne B Warwick, Baldeep Wirk, Parinda A Mehta
This CIBMTR report describes the use of hematopoietic stem cell transplantation (HSCT) in 4408 pediatric patients with cancer undergoing allogeneic (allo) and 3076 undergoing autologous (auto) HSCT in the United States between 2008 and 2014. In both settings, there was a greater proportion of males (n=4327; 57%), children<10 years of age (n=4412; 59%), Caucasians (n=5787; 77%) and children with a performance score ≥ 90% at HSCT (n=6187; 83%). Leukemia was the most common indication for an allo-transplant (n=4170; 94%), and among these, acute lymphoblastic leukemia (ALL) in second complete remission (n=829; 20%) and acute myeloid leukemia in first complete remission (n=800; 19%) were the most common...
April 24, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28449393/a-phase-1-study-of-the-c-met-inhibitor-tivantinib-arq197-in-children-with-relapsed-or-refractory-solid-tumors-a-children-s-oncology-group-study-phase-1-and-pilot-consortium-trial-advl1111
#13
James I Geller, John P Perentesis, Xiaowei Liu, Charles G Minard, Rachel A Kudgus, Joel M Reid, Elizabeth Fox, Susan M Blaney, Brenda J Weigel
BACKGROUND: The c-Met receptor tyrosine kinase is dysregulated in many pediatric cancers. Tivantinib is an oral small molecule that inhibits the c-Met receptor tyrosine kinase. A phase 1 and pharmacokinetic (PK) trial evaluating tivantinib was conducted in children with relapsed/refractory solid tumors. METHODS: Oral tivantinib capsules were administered twice daily with food, continuously in 28-day cycles. Dose levels 170, 200, and 240 mg/m(2) /dose were evaluated using a rolling-six design (Part A)...
April 27, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28445970/acid-ceramidase-is-a-novel-drug-target-for-pediatric-brain-tumors
#14
Ninh B Doan, Ha S Nguyen, Andrew Montoure, Mona M Al-Gizawiy, Wade M Mueller, Shekar Kurpad, Scott D Rand, Jennifer M Connelly, Christopher R Chitambar, Kathleen M Schmainda, Shama P Mirza
Pediatric brain tumors are the most common solid tumors in children and are also a leading culprit of cancer-related fatalities in children. Pediatric brain tumors remain hard to treat. In this study, we demonstrated that medulloblastoma, pediatric glioblastoma, and atypical teratoid rhabdoid tumors express significant levels of acid ceramidase, where levels are highest in the radioresistant tumors, suggesting that acid ceramidase may confer radioresistance. More importantly, we also showed that acid ceramidase inhibitors are highly effective at targeting these pediatric brain tumors with low IC50 values (4...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28442918/targeting-the-pd-1-pathway-in-pediatric-solid-tumors-and-brain-tumors
#15
REVIEW
Lars M Wagner, Val R Adams
While remarkable advances have been made in the treatment of pediatric leukemia over the past decades, new therapies are needed for children with advanced solid tumors and high-grade brain tumors who fail standard chemotherapy regimens. Immunotherapy with immune checkpoint inhibitors acting through the programmed cell death-1 (PD-1) pathway has shown efficacy in some chemotherapy-resistant adult cancers, generating interest that these agents may also be helpful to treat certain refractory pediatric malignancies...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28414399/current-understanding-of-the-health-effects-of-electromagnetic-fields
#16
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
#17
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
#18
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 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
#19
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
#20
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) 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
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