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radiation cognition

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https://www.readbyqxmd.com/read/28893524/-hippocampus-brainstem-and-brain-dose-volume-constraints-for-fractionated-3-d-radiotherapy-and-for-stereotactic-radiation-therapy-limits-and-perspectives
#1
M Gérard, R Jumeau, B Pichon, J Biau, E Blais, J Horion, G Noël
Cerebral radiation-induced toxicities after radiotherapy (RT) of brain tumors are frequent. The protection of organs at risk (OAR) is crucial, especially for brain tumors, to preserve cognition in cancer survivors. Dose constraints of cerebral OAR used in conventional RT, radiosurgery (SRS) and stereotactic radiotherapy (SRT) are debated. In fact, they are based on historical cohorts or calculated with old mathematical models. Values of α/β ratio of cerebral OAR are also controversial leading to misestimate the equivalent dose in 2Gy fractions or the biological equivalent dose, especially during hypofractionated RT...
September 8, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28891655/longitudinal-intra-individual-variability-in-neuropsychological-performance-relates-to-white-matter-changes-in-hiv
#2
Jacob D Jones, Taylor Kuhn, Zanjbeel Mahmood, Elyse J Singer, Charles H Hinkin, April D Thames
OBJECTIVES: Recent studies suggest that intraindividual variability (IIV) of neuropsychological performance may be sensitive to HIV-associated neurologic compromise. IIV may be particularly dependent upon the integrity of frontal-subcortical systems, and therefore may be a meaningful phenotype in HIV. We examined the relationship between change in IIV and white matter integrity among HIV seropositive (HIV+) and HIV seronegative (HIV-) individuals. METHOD: The sample consisted of 38 HIV+ participants and 26 HIV- control participants who underwent neuroimaging and a neuropsychological evaluation at baseline and at 2-year follow-up evaluation...
September 11, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28883530/study-on-dose-dependent-frequency-dependent-and-accumulative-effects-of-1-5%C3%A2-ghz-and-2-856%C3%A2-ghz-microwave-on-cognitive-functions-in-wistar-rats
#3
Shengzhi Tan, Hui Wang, Xinping Xu, Li Zhao, Jing Zhang, Ji Dong, Binwei Yao, Haoyu Wang, Hongmei Zhou, Yabing Gao, Ruiyun Peng
Many studies have revealed the cognitive decline induced by microwave radiation. However, the systematic study on dose-dependent, frequency-dependent and accumulative effects of microwave exposure at different frequencies was lacking. Here, we studied the relationship between the effects and the power and frequency of microwave and analyzed the accumulative effects of two different frequency microwaves with the same average power density. After microwave radiation, declines in spatial learning and memory and fluctuations of brain electric activities were found in the 10 mW/cm(2) single frequency exposure groups and accumulative exposure groups...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28870792/multicenter-phase-1-dose-escalation-study-of-hypofractionated-stereotactic-radiation-therapy-with-bevacizumab-for-recurrent-glioblastoma-and-anaplastic-astrocytoma
#4
Jennifer Clarke, Elizabeth Neil, Robert Terziev, Philip Gutin, Igor Barani, Thomas Kaley, Andrew B Lassman, Timothy A Chan, Josh Yamada, Lisa DeAngelis, Ase Ballangrud, Robert Young, Katherine S Panageas, Kathryn Beal, Antonio Omuro
PURPOSE: To establish the maximum tolerated dose of a 3-fraction hypofractionated stereotactic reirradiation schedule when delivered with concomitant bevacizumab to treat recurrent high-grade gliomas. METHODS AND MATERIALS: Patients with recurrent high-grade glioma with Karnofsky performance status ≥60, history of standard fractionated initial radiation, tumor volume at recurrence ≤40 cm(3), and absence of brainstem or corpus callosum involvement were eligible...
June 30, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28868253/relationships-between-regional-radiation-doses-and-cognitive-decline-in-children-treated-with-cranio-spinal-irradiation-for-posterior-fossa-tumors
#5
Elodie Doger de Speville, Charlotte Robert, Martin Perez-Guevara, Antoine Grigis, Stephanie Bolle, Clemence Pinaud, Christelle Dufour, Anne Beaudré, Virginie Kieffer, Audrey Longaud, Jacques Grill, Dominique Valteau-Couanet, Eric Deutsch, Dimitri Lefkopoulos, Catherine Chiron, Lucie Hertz-Pannier, Marion Noulhiane
Pediatric posterior fossa tumor (PFT) survivors who have been treated with cranial radiation therapy often suffer from cognitive impairments that might relate to IQ decline. Radiotherapy (RT) distinctly affects brain regions involved in different cognitive functions. However, the relative contribution of regional irradiation to the different cognitive impairments still remains unclear. We investigated the relationships between the changes in different cognitive scores and radiation dose distribution in 30 children treated for a PFT...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28866326/progesterone-improves-neurocognitive-outcomes-following-therapeutic-cranial-irradiation-in-mice
#6
Seema Yousuf, Daniel J Brat, Hui-Kuo Shu, Ya Wang, Donald G Stein, Fahim Atif
Despite improved therapeutic methods, CNS toxicity resulting from cancer treatment remains a major cause of post-treatment morbidity. More than half of adult patients with cranial irradiation for brain cancer develop neurobehavioral/cognitive deficits that severely impact quality of life. We examined the neuroprotective effects of the neurosteroid progesterone (PROG) against ionizing radiation (IR)-induced neurobehavioral/cognitive deficits in mice. Male C57/BL mice were exposed to one of two fractionated dose regimens of IR (3Gy×3 or 3Gy×5)...
September 14, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28866028/long-term-impairment-of-cognitive-functions-and-alterations-of-nmdar-subunits-after-continuous-microwave-exposure
#7
Hui Wang, Shengzhi Tan, Xinping Xu, Li Zhao, Jing Zhang, Binwei Yao, Yabing Gao, Hongmei Zhou, Ruiyun Peng
OBJECTIVE: The long term effects of continuous microwave exposure cannot be ignored for the simulation of the real environment and increasing concerns about the negative cognitive effects of microwave exposure. METHODS: In this study, 220 male Wistar rats were exposed by a 2.856GHz radiation source with the average power density of 0, 2.5, 5 and 10mW/cm(2) for 6min/day, 5days/week and up to 6weeks. The MWM task, the EEG analysis, the hippocampus structure observation and the western blot were applied until the 12months after microwave exposure to detect the spatial learning and memory abilities, the cortical electrical activity, changes of hippocampal structure and the NMDAR subunits expressions...
September 1, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28862111/how-can-we-improve-education-of-breast-surgeons-across-europe
#8
Agnieszka Kolacinska
The proposed global curriculum developed by the American Society of Surgical Oncology (SSO) and the European Society of Surgical Oncology (ESSO) and the textbook: provides a state-of- the- art of breast cancer surgery, complements the syllabus and curriculum of the Union Europeenne des Medecins Specialistes (UEMS) examination in breast surgery/ European Board of Surgery Qualification in Breast Surgery (EBSQinBS) administered by ESSO (1) Knowledge and understanding of the principles of breast cancer incidence, aetiology, risk factors, genetics, premalignant and high-risk lesions, pathology, prognostic and predictive factors, risk prediction models, screening, diagnosis and imaging, breast cancer, oncoplastic, reconstructive breast surgery, axillary surgery and future perspective for this, radiation therapy, neoadjuvant and adjuvant systemic treatment- endocrine-, immuno- and chemotherapy, side effects and toxicities of treatment, locoregional recurrence, follow-up, locally advanced breast cancer, metastatic breast cancer, breast cancer in young and elderly patients, survivor issues, lymphedema, palliative care, chroni pain, body image and sexuality, fertility issues, cognitive functions, etc...
July 2017: Chirurgia
https://www.readbyqxmd.com/read/28861706/xerostomia-quality-of-life-scale-xeqols-questionnaire-validation-of-italian-version-in-head-and-neck-cancer-patients
#9
Luciana Lastrucci, Silvia Bertocci, Vittorio Bini, Simona Borghesi, Roberta De Majo, Andrea Rampini, Pietro Giovanni Gennari, Paola Pernici
AIM: To translate the Xerostomia Quality-of-Life Scale (XeQoLS) into Italian language (XeQoLS-IT). Xerostomia is the most relevant acute and late toxicity in patients with head and neck cancer treated with radiotherapy (RT). Patient-reported outcome (PRO) instruments are subjective report on patient perception of health status. The XeQoLS consists of 15 items and measures the impact of salivary gland dysfunction and xerostomia on the four major domains of oral health-related QoL. METHODS: The XeQoLS-IT was created through a linguistic validation multi-step process: forward translation (TF), backward translation (TB) and administration of the questionnaire to 35 Italian patients with head and neck cancer...
August 31, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28860216/arterial-spin-labeling-perfusion-mr-imaging-demonstrates-regional-cbf-decrease-in-idiopathic-normal-pressure-hydrocephalus
#10
J Virhammar, K Laurell, A Ahlgren, E-M Larsson
BACKGROUND AND PURPOSE: Regional cerebral blood flow has previously been studied in patients with idiopathic normal pressure hydrocephalus with imaging methods that require an intravenous contrast agent or expose the patient to ionizing radiation. The purpose of this study was to assess regional CBF in patients with idiopathic normal pressure hydrocephalus compared with healthy controls using the noninvasive quantitative arterial spin-labeling MR imaging technique. A secondary aim was to compare the correlation between symptom severity and CBF...
August 31, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28855404/cognition-and-gray-and-white-matter-characteristics-of-presymptomatic-c9orf72-repeat-expansion
#11
Janne M Papma, Lize C Jiskoot, Jessica L Panman, Elise G Dopper, Tom den Heijer, Laura Donker Kaat, Yolande A L Pijnenburg, Lieke H Meeter, Rick van Minkelen, Serge A R B Rombouts, John C van Swieten
OBJECTIVE: To investigate cognitive function, gray matter volume, and white matter integrity in the presymptomatic stage of chromosome 9 open reading frame 72 repeat expansion (C9orf72RE). METHODS: Presymptomatic C9orf72RE carriers (n = 18) and first-degree family members without a pathogenic expansion (healthy controls [HC], n = 15) underwent a standardized protocol of neuropsychological tests, T1-weighted MRI, and diffusion tensor imaging within our cohort study of autosomal dominant frontotemporal dementia (FTD)...
August 30, 2017: Neurology
https://www.readbyqxmd.com/read/28844239/personal-samplers-of-bioavailable-pesticides-integrated-with-a-hair-follicle-assay-of-dna-damage-to-assess-environmental-exposures-and-their-associated-risks-in-children
#12
Pierre-Alexandre Vidi, Kim A Anderson, Haiying Chen, Rebecca Anderson, Naike Salvador-Moreno, Dana C Mora, Carolyn Poutasse, Paul J Laurienti, Stephanie S Daniel, Thomas A Arcury
Agriculture in the United States employs youth ages ten and older in work environments with high pesticide levels. Younger children in rural areas may also be affected by indirect pesticide exposures. The long-term effects of pesticides on health and development are difficult to assess and poorly understood. Yet, epidemiologic studies suggest associations with cancer as well as cognitive deficits. We report a practical and cost-effective approach to assess environmental pesticide exposures and their biological consequences in children...
October 2017: Mutation Research
https://www.readbyqxmd.com/read/28844078/long-term-effects-of-radiation-therapy-on-white-matter-of-the-corpus-callosum-a-diffusion-tensor-imaging-study-in-children
#13
Monwabisi Makola, M Douglas Ris, E Mark Mahone, Keith Owen Yeates, Kim M Cecil
BACKGROUND: Despite improving survival rates, children are at risk for long-term cognitive and behavioral difficulties following the diagnosis and treatment of a brain tumor. Surgery, chemotherapy and radiation therapy have all been shown to impact the developing brain, especially the white matter. OBJECTIVE: The purpose of this study was to determine the long-term effects of radiation therapy on white matter integrity, as measured by diffusion tensor imaging, in pediatric brain tumor patients 2 years after the end of radiation treatment, while controlling for surgical interventions...
August 26, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28837952/association-of-obesity-with-cognitive-function-and-brain-structure-in-patients-with-major-depressive-disorder
#14
Shinsuke Hidese, Miho Ota, Junko Matsuo, Ikki Ishida, Moeko Hiraishi, Sumiko Yoshida, Takamasa Noda, Noriko Sato, Toshiya Teraishi, Kotaro Hattori, Hiroshi Kunugi
BACKGROUND: Obesity has been implicated in the pathophysiology of major depressive disorder (MDD), which prompted us to examine the possible association of obesity with cognitive function and brain structure in patients with MDD. METHODS: Three hundred and seven patients with MDD and 294 healthy participants, matched for age, sex, ethnicity (Japanese), and handedness (right) were recruited for the study. Cognitive function was assessed using the Brief Assessment of Cognition in Schizophrenia (BACS)...
August 16, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28830646/dynamics-of-patient-reported-quality-of-life-and-symptoms-in-the-acute-phase-of-online-adaptive-external-beam-radiation-therapy-for-locally-advanced-cervical-cancer
#15
S T Heijkoop, R A Nout, S Quint, J W M Mens, B J M Heijmen, M S Hoogeman
OBJECTIVE: For locally advanced cervical cancer patients, treated with External Beam Radiotherapy (EBRT), Quality of Life (QoL) questionnaires arefrequently used to evaluate treatment-related symptoms and functioning scales. Currently, it is unknown how those evolve during the radiation treatment course. In this prospective study we report on weekly-captured patient-reported QoL and symptoms during image-guided adaptive radiotherapy (IGART) of cervical cancer patients. MATERIAL AND METHODS: Between January 2012 and September 2016, all locally advanced cervical cancer patients treated with IGART and brachytherapy with or without chemotherapy or hyperthermia, were eligible...
August 19, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28826419/state-dependent-microstructural-white-matter-changes-in-drug-na%C3%A3-ve-patients-with-first-episode-psychosis
#16
M H Serpa, J Doshi, G Erus, T M Chaim-Avancini, M Cavallet, M T van de Bilt, P C Sallet, W F Gattaz, C Davatzikos, G F Busatto, M V Zanetti
BACKGROUND: Diffusion tensor imaging (DTI) studies have consistently shown white matter (WM) microstructural abnormalities in schizophrenia. Whether or not such alterations could vary depending on clinical status (i.e. acute psychosis v. remission) remains to be investigated. METHODS: Twenty-five treatment-naïve first-episode psychosis (FEP) patients and 51 healthy-controls (HC) underwent MRI scanning at baseline. Twenty-one patients were re-scanned as soon as they achieved sustained remission of symptoms; 36 HC were also scanned twice...
August 22, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28822836/fty720-fingolimod-an-oral-s1pr-modulator-mitigates-radiation-induced-cognitive-deficits
#17
Alexander M Stessin, Matei A Banu, Mariano Guardia Clausi, Nicholas Berry, John A Boockvar, Samuel Ryu
PURPOSE: This study evaluates FTY720/Fingolimod, modulator of sphingosine-1-phosphate (S1P) receptor, as a potential mitigator of radiation-induced neurocognitive dysfunction. METHODS AND MATERIALS: To study radiation-induced neurocognitive deficits, 6 week-old C57/Bl/6J mice received 0 or 7Gy cranial irradiation and were treated with FTY720 or vehicle for seven weeks. Fear conditioning and Morris water maze were then employed to test learning and memory. Immunohistochemical staining for neural progenitor cells (NPCs) and mature neurons was used to assess changes in hippocampal neurogenesis...
August 16, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28812301/changing-treatment-paradigms-for-brain-metastases-from-melanoma-part-1-diagnosis-prognosis-symptom-control-and-local-treatment
#18
REVIEW
Vyshak Alva Venur, Pauline Funchain, Rupesh Kotecha, Samuel T Chao, Manmeet S Ahluwalia
Melanoma is the third most common cause of brain metastases, after lung and breast cancer. The management of melanoma brain metastases can be broadly divided into symptom control and therapeutic strategies. Supportive treatments include corticosteroids to reduce peritumoral edema, antiepileptics for seizure control, and medications to preserve cognitive function. Until recently, therapeutic strategies consisted primarily of local treatments, including surgery, whole-brain radiation therapy (WBRT), and stereotactic radiosurgery (SRS)...
August 15, 2017: Oncology (Williston Park, NY)
https://www.readbyqxmd.com/read/28797847/cytokine-gene-polymorphisms-associated-with-symptom-clusters-in-oncology-patients-undergoing-radiation-therapy
#19
Christine Miaskowski, Yvette P Conley, Judy Mastick, Steven M Paul, Bruce A Cooper, Jon D Levine, Mitchell Knisely, Kord M Kober
CONTEXT: Most of the reviews on the biological basis for symptom clusters suggest that inflammatory processes are involved in the development and maintenance of the symptom clusters. However, no studies have evaluated for associations between genetic polymorphisms and common symptom clusters (e.g., mood disturbance, sickness behavior). OBJECTIVES: Examine the associations between cytokine gene polymorphisms and the severity of three distinct symptom clusters (i...
August 7, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/28797254/relationship-between-radiation-dose-and-microbleed-formation-in-patients-with-malignant-glioma
#20
Michael Wahl, Mekhail Anwar, Christopher P Hess, Susan M Chang, Janine M Lupo
BACKGROUND: Cranial irradiation is associated with long-term cognitive changes. Cerebral microbleeds (CMBs) have been identified on susceptibility-weighted MRI (SWI) in patients who have received prior cranial radiation, and serve as radiographic markers for microvascular injury thought to contribute to late cognitive decline. The relationship between CMB formation and radiation dose has not previously been quantified. METHODS: SWI was performed on 13 patients with stable WHO grade III-IV gliomas between 2 and 4 years after chemoradiotherapy to 60 Gy...
August 10, 2017: Radiation Oncology
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