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radiation cognition

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https://www.readbyqxmd.com/read/29351056/remediation-of-radiation-induced-cognitive-dysfunction-through-oral-administration-of-the-neuroprotective-compound-nsi-189
#1
Barrett Allen, Munjal M Acharya, Celine Lu, Erich Giedzinski, Nicole Chmielewski, David Quach, Mike Hefferan, Karl K Johe, Charles L Limoli
Clinical management of primary and secondary central nervous system (CNS) malignancies frequently includes radiotherapy to forestall tumor growth and recurrence after surgical resection. While cranial radiotherapy remains beneficial, adult and pediatric brain tumor survivors suffer from a wide range of debilitating and progressive cognitive deficits. Although this has been recognized as a significant problem for decades, there remains no clinical recourse for the unintended neurocognitive sequelae associated with these types of cancer treatments...
January 19, 2018: Radiation Research
https://www.readbyqxmd.com/read/29346028/biophysics-model-of-heavy-ion-degradation-of-neuron-morphology-in-mouse-hippocampal-granular-cell-layer-neurons
#2
Murat Alp, Francis A Cucinotta
Exposure to heavy-ion radiation during cancer treatment or space travel may cause cognitive detriments that have been associated with changes in neuron morphology and plasticity. Observations in mice of reduced neuronal dendritic complexity have revealed a dependence on radiation quality and absorbed dose, suggesting that microscopic energy deposition plays an important role. In this work we used morphological data for mouse dentate granular cell layer (GCL) neurons and a stochastic model of particle track structure and microscopic energy deposition (ED) to develop a predictive model of high-charge and energy (HZE) particle-induced morphological changes to the complex structures of dendritic arbors...
January 18, 2018: Radiation Research
https://www.readbyqxmd.com/read/29344423/age-related-gray-and-white-matter-changes-in-normal-adult-brains
#3
Farnaz Farokhian, Chunlan Yang, Iman Beheshti, Hiroshi Matsuda, Shuicai Wu
Normal aging is associated with both structural changes in many brain regions and functional declines in several cognitive domains with advancing age. Advanced neuroimaging techniques enable explorative analyses of structural alterations that can be used as assessments of such age-related changes. Here we used voxel-based morphometry (VBM) to investigate regional and global brain volume differences among four groups of healthy adults from the IXI Dataset: older females (OF, mean age 68.35 yrs; n=69), older males (OM, 68...
December 2017: Aging and Disease
https://www.readbyqxmd.com/read/29332539/whole-body-oxygen-16o-ion-exposure-induced-impairments-in-social-odor-recognition-memory-in-rats-are-dose-and-time-dependent
#4
Ami Mange, Yuqing Cao, SiYuan Zhang, Robert D Hienz, Catherine M Davis
Future long-duration space missions will involve travel outside of the Earth's magnetosphere, which will result in increased radiation exposure for astronauts. Exposure could permanently damage multiple tissues, including the central nervous system (CNS), and result in deleterious effects on cognition and behavior during and beyond the mission. Here, we assessed the effects of whole-body oxygen ion (16O; 1,000 MeV/n) exposure (5 or 25 cGy) on social odor recognition memory in male Long-Evans rats at one and six months after exposure...
January 13, 2018: Radiation Research
https://www.readbyqxmd.com/read/29310710/photobiomodulation-using-low-level-laser-therapy-lllt-for-patients-with-chronic-traumatic-brain-injury-a-randomized-controlled-trial-study-protocol
#5
Guilherme da Cruz Ribeiro Poiani, Ana Luiza Zaninotto, Ana Maria Costa Carneiro, Renato Amaro Zangaro, Afonso Shiguemi Inoue Salgado, Rodolfo Borges Parreira, Almir Ferreira de Andrade, Manoel Jacobsen Teixeira, Wellingson Silva Paiva
BACKGROUND: Photobiomodulation using low-level laser therapy (LLLT) has been tested as a new technique to optimize recovery of patients with traumatic brain injury (TBI). The aim of this study is to evaluate inhibitory attentional control after 18 sessions of active LLLT and compare with the placebo group (sham LLLT). Our exploratory analysis will evaluate the efficacy of the active LLLT on verbal and visuospatial episodic memory, executive functions (working memory, verbal and visuospatial fluency, attentional processes), and anxiety and depressive symptoms compared to the sham group...
January 8, 2018: Trials
https://www.readbyqxmd.com/read/29288597/fractionation-enhances-acute-oligodendrocyte-progenitor-cell-radiation-sensitivity-and-leads-to-long-term-depletion
#6
Sage Begolly, John A Olschowka, Tanzy Love, Jacqueline P Williams, M Kerry O'Banion
Ionizing radiation (IR) is commonly used to treat central nervous system (CNS) cancers and metastases. While IR promotes remission, frequent side effects including impaired cognition and white matter loss occur following treatment. Fractionation is used to minimize these CNS late side effects, as it reduces IR effects in differentiated normal tissue, but not rapidly proliferating normal or tumor tissue. However, side effects occur even with the use of fractionated paradigms. Oligodendrocyte progenitor cells (OPCs) are a proliferative population within the CNS affected by radiation...
December 30, 2017: Glia
https://www.readbyqxmd.com/read/29288061/the-effect-of-brain-derived-neurotrophic-factor-on-radiation-induced-neuron-architecture-impairment-is-associated-with-the-nfatc4-3-pathway
#7
Qixian Zhang, Xiaoyang Li, Ru He, Quanhong Ma, Rui Sun, Shengjun Ji, Bei Wang, Ye Tian
Irradiation to developing brains results in progressive cognitive dysfunction. Changes in the morphology of mature neurons are thought to be related to impairments of cognitive function. However, little is known about the effects of radiation on neurite outgrowth of immature neurons. Therefore, we sought to evaluate the structural alterations of immature neurons following X-ray irradiation and determine potential strategies to reverse it. Our data revealed damage to the neurite outgrowths of cultured neurons after 2 Gy and 8 Gy irradiation at 1 d and 3 d, respectively...
December 26, 2017: Brain Research
https://www.readbyqxmd.com/read/29287892/-neurocognition-impact-of-radiotherapy
#8
REVIEW
Antoni Delphine
The cognitive evaluation is essential to arrest the impact of brain tumours on brain functions. Radiation therapy on the brain has side effects, which can impact on the cognitive functioning. The cognitive disorders constitute a predictive factor of the quality of life of the patients impacting on their autonomy, as well as on their social and professional life. This problem thus takes a more and more important place in the reflection on the cancer care. A better detection of these cognitive disorders requires a better cognitive evaluation from the diagnosis...
December 26, 2017: Bulletin du Cancer
https://www.readbyqxmd.com/read/29286511/cerebral-impact-of-prenatal-irradiation-by-131i-an-experimental-model-of-clinical-neuroradioembryological-effects
#9
V V Talko, K M Loganovsky, I P Drozd, Ye V Tukalenko, T K Loganovska, S Yu Nechayev, S V Masiuk, Ye M Prokhorova
Human brain in prenatal period is a most vulnerable to ionizing radiation body structure. Unlike atomic bombings or radiological interventions in healthcare leading at most to external irradiation the intensive internal exposure may occur upon nuclear reactor accidents followed by substantial release and fallout of radioactive 131I. The latter can lead to specific neuroradioembryological effects. OBJECTIVE: To create an experimental model of prenatal cerebral radiation effects of 131I in human and to determine the experimental and clinical neuroradioembryological effects...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29286496/evoked-bioelectrical-brain-activity-following-exposure-to-ionizing-radiation
#10
K Loganovsky, K Kuts
The article provides an overview of modern physiological evidence to support the hypothesis on cortico limbic sys tem dysfunction due to the hippocampal neurogenesis impairment as a basis of the brain interhemispheric asym metry and neurocognitive deficit after radiation exposure. The importance of the research of both evoked poten tials and fields as a highly sensitive and informative method is emphasized.Particular attention is paid to cerebral sensor systems dysfunction as a typical effect of ionizing radiation...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29286493/twenty-five-years-of-the-national-academy-of-medical-sciences-of-ukraine-progress-and-priorities-for-future-of-radiation-medicine-and-biology
#11
D Bazyka
After the creation of the Academy of Medical Sciences of Ukraine in 1993 the Research Center for Radiation Medicine was among the first institutions to join the Academy (fig. 1). Estab lishing the Academy was among the first steps of the independent Ukrainian government and aimed to provide a high level health care for population. It was extremely needed for the minimization of Chornobyl medical consequences. This choice was related to a growing recognition of the scientific research in fulfilling the Сenter's mission - study of the effects of low dose radiation on human body and radiation protection of the exposed population...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29277407/skin-cancer-interventions-across-the-cancer-control-continuum-review-of-technology-environment-and-theory
#12
REVIEW
Jennifer M Taber, Barbra A Dickerman, Jean-Phillip Okhovat, Alan C Geller, Laura A Dwyer, Anne M Hartman, Frank M Perna
The National Cancer Institute's Skin Cancer Intervention across the Cancer Control Continuum model was developed to summarize research and identify gaps concerning skin cancer interventions. We conducted a mapping review to characterize whether behavioral interventions addressing skin cancer prevention and control from 2000 to 2015 included (1) technology, (2) environmental manipulations (policy and/or built environment), and (3) a theoretical basis. We included 85 studies with a randomized controlled or quasi-experimental design that targeted behavioral intervention in skin cancer for children and/or adults; seven of these were dissemination or implementation studies...
December 22, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/29246925/a%C3%AE-mediates-f-actin-disassembly-in-dendritic-spines-leading-to-cognitive-deficits-in-alzheimer-s-disease
#13
Reddy Peera Kommaddi, Debajyoti Das, Smitha Karunakaran, Siddharth Nanguneri, Deepti Bapat, Ajit Ray, Eisha Shaw, David A Bennett, Deepak Nair, Vijayalakshmi Ravindranath
Dendritic spine loss is recognized as an early feature of Alzheimer's disease, however the underlying mechanisms are poorly understood. Dendritic spine structure is defined by filamentous actin (F-actin) and we observed depolymerization of synaptosomal F-actin accompanied by increased G-actin, as early as 1 month of age in a mouse model of Alzheimer's disease (AD; APPswe/PS1ΔE9, male mice). This led to recall deficit after contextual fear conditioning (cFC) at 2 months of age in APPswe/PS1ΔE9 male mice, which could be reversed by actin polymerizing agent, jasplakinolide...
December 15, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29228390/altered-brain-morphology-after-focal-radiation-reveals-impact-of-off-target-effects-implications-for-white-matter-development-and-neurogenesis
#14
Kiran G Beera, Yu-Qing Li, Jun Dazai, James Stewart, Shannon Egan, Mashal Ahmed, C Shun Wong, David A Jaffray, Brian J Nieman
Background: Children with brain tumors treated with cranial radiation therapy (RT) often exhibit cognitive late effects, commonly associated with reduced white matter (WM) volume and decreased neurogenesis. The impact of radiation damage in particular regions or tissues on brain development as a whole has not been elucidated. Methods: We delivered whole-brain or focal radiation (8 Gy single dose) to infant mice. Focal treatments targeted white matter (anterior commissure), neuronal (olfactory bulbs), or neurogenic (subventricular zone) regions...
November 2, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/29214403/executive-functioning-academic-skills-and-quality-of-life-in-pediatric-patients-with-brain-tumors-post-proton-radiation-therapy
#15
Lea M Ventura, Julie A Grieco, Casey L Evans, Karen A Kuhlthau, Shannon M MacDonald, Nancy J Tarbell, Torunn I Yock, Margaret B Pulsifer
Radiation therapy (RT) is integral in the treatment of pediatric brain tumors; however, photon RT (XRT) often results in intellectual decline, executive functioning (EF) deficits, academic underachievement/failure, and lower health-related quality of life (HRQoL). Proton RT (PRT) provides more targeted therapy, minimizing damage to the developing brain, yet few studies have examined its neuropsychological effects. This study investigated the role of EF in academic skills and HRQoL in a sample of children treated with PRT...
December 6, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29204530/hippocampal-dose-volume-histogram-predicts-hopkins-verbal-learning-test-scores-after-brain-irradiation
#16
Catherine Okoukoni, Emory R McTyre, Diandra N Ayala Peacock, Ann M Peiffer, Roy Strowd, Christina Cramer, William H Hinson, Steve Rapp, Linda Metheny-Barlow, Edward G Shaw, Michael D Chan
Purpose: Radiation-induced cognitive decline is relatively common after treatment for primary and metastatic brain tumors; however, identifying dosimetric parameters that are predictive of radiation-induced cognitive decline is difficult due to the heterogeneity of patient characteristics. The memory function is especially susceptible to radiation effects after treatment. The objective of this study is to correlate volumetric radiation doses received by critical neuroanatomic structures to post-radiation therapy (RT) memory impairment...
October 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29200112/epidemiology-treatment-and-complications-of-central-nervous-system-metastases
#17
Amy A Pruitt
PURPOSE OF REVIEW: Neurologic problems resulting from systemic cancer metastases to brain parenchyma, dura, spinal cord, and leptomeninges are among the most common types of consultations addressed by neurologists. With patients surviving longer from systemic cancer, along with the rapidly evolving therapeutic options, the treatment of these devastating complications has become both more effective and more complicated. This article reviews current patterns of metastatic disease and the increasingly nuanced landscape of evolving therapies, their complications, and their impact on quality of survival...
December 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/29200111/low-grade-gliomas
#18
David Schiff
PURPOSE OF REVIEW: Low-grade gliomas present vexing management issues for neuro-oncologists. The relatively long survival compared to other brain tumors makes consideration of treatment toxicity, and thus timing of potentially damaging interventions such as surgery, radiation, and chemotherapy, crucial. Moreover, the rarity of these tumors makes clinical trials to ascertain optimal care challenging. RECENT FINDINGS: The discovery that most low-grade gliomas harbor isocitrate dehydrogenase (IDH) mutations that confer a favorable prognosis has improved diagnosis and risk stratification of these tumors...
December 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/29191480/preterm-birth-leads-to-hyper-reactive-cognitive-control-processing-and-poor-white-matter-organization-in-adulthood
#19
Alexander Olsen, Emily L Dennis, Kari Anne I Evensen, Ingrid Marie Husby Hollund, Gro C C Løhaugen, Paul M Thompson, Ann-Mari Brubakk, Live Eikenes, Asta K Håberg
Individuals born preterm with very low birth weight (VLBW; birth weight ≤ 1500 g) are at high risk for perinatal brain injuries and deviant brain development, leading to increased chances of later cognitive, emotional, and behavioral problems. Here we investigated the neuronal underpinnings of both reactive and proactive cognitive control processes in adults with VLBW. We included 32 adults born preterm with VLBW (before 37th week of gestation) and 32 term-born controls (birth weight ≥10th percentile for gestational age) between 22 and 24 years of age that have been followed prospectively since birth...
November 27, 2017: NeuroImage
https://www.readbyqxmd.com/read/29184694/survivorship-after-treatment-of-pancreatic-cancer-insights-via-an-internet-based-survivorship-care-plan-tool
#20
REVIEW
Melissa A Frick, Carolyn C Vachani, Margaret K Hampshire, Christina Bach, Karen Arnold-Korzeniowski, James M Metz, Christine E Hill-Kayser
Pancreatic cancer survivors face a unique set of challenges in survivorship, yet structured survivorship care planning is lacking in practice. Survivorship care plans (SCPs) are an essential part of quality cancer care and can facilitate the transition following active treatment; the use of SCPs in pancreatic cancer survivors, however, has not been explored. With a convenience sample of 117 pancreatic cancer survivors and proxies who used an Internet-based SCP tool, we examined treatment details, patient-reported outcomes, and survivorship practices...
October 2017: Journal of Gastrointestinal Oncology
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