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https://www.readbyqxmd.com/read/28441284/comparison-of-homogeneous-and-particulate-lung-dose-rates-for-small-mammals
#1
Emily Caffrey, Mathew Johansen, Jarvis Caffrey, Kathryn Higley
Small, highly radioactive fragments of material incorporated into metallic matrices are commonly found at nuclear weapons test and accident sites and can be inhaled by wildlife. Inhaled particles often partition heterogeneously in the lungs, with aggregation occurring in the periphery of the lung, and are tenaciously retained. However, dose rates are typically calculated as if the material were homogeneously distributed throughout the entire organ. Here the authors quantify the variation in dose rates for alpha-, beta-, and gamma-emitting radionuclides with particle sizes from 0...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28440737/heart-rate-variability-depression-in-porcine-peritonitis-induced-sepsis-without-organ-failure
#2
Dagmar Jarkovska, Lenka Valesova, Jiri Chvojka, Jan Benes, Vojtech Danihel, Jitka Sviglerova, Lukas Nalos, Martin Matejovic, Milan Stengl
Depression of heart-rate variability (HRV) in conditions of systemic inflammation has been shown in both patients and experimental animal models and HRV has been suggested as an early indicator of sepsis. The sensitivity of HRV-derived parameters to the severity of sepsis, however, remains unclear. In this study we modified the clinically relevant porcine model of peritonitis-induced sepsis in order to avoid the development of organ failure and to test the sensitivity of HRV to such non-severe conditions. In 11 anesthetized, mechanically ventilated and instrumented domestic pigs of both sexes, sepsis was induced by fecal peritonitis...
May 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28440431/gdf-15-gene-expression-alterations-in-human-lymphoblastoid-cells-and-peripheral-blood-lymphocytes-following-exposure-to-ionizing-radiation
#3
Shuang Li, Qing-Zhao Zhang, De-Qin Zhang, Jiang-Bin Feng, Qun Luo, Xue Lu, Xin-Ru Wang, Kun-Peng Li, De-Qing Chen, Xiao-Feng Mu, Ling Gao, Qing-Jie Liu
The identification of rapid, sensitive and high‑throughput biomarkers is imperative in order to identify individuals harmed by radiation accidents, and accurately evaluate the absorbed doses of radiation. DNA microarrays have previously been used to evaluate the alterations in growth/differentiation factor 15 (GDF15) gene expression in AHH‑1 human lymphoblastoid cells, following exposure to γ‑rays. The present study aimed to characterize the relationship between the dose of ionizing radiation and the produced effects in GDF‑15 gene expression in AHH‑1 cells and human peripheral blood lymphocytes (HPBLs)...
April 12, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28440041/ultrasound-assisted-versus-conventional-catheter-directed-thrombolysis-for-acute-ilio-femoral-deep-vein-thrombosis-one-year-follow-up-data-of-a-randomized-controlled-trial
#4
Rolf P Engelberger, Anna Stuck, David Spirk, Torsten Willenberg, Axel Haine, Daniel Périard, Iris Baumgartner, Nils Kucher
BACKGROUND: In patients with acute ilio-femoral deep vein thrombosis (IFDVT), catheter-directed thrombolysis (CDT) aims to prevent the post-thrombotic syndrome (PTS). Adding intravascular high-frequency, low-power ultrasound energy to CDT does not seem to improve the immediate thrombolysis results but its impact on clinical outcomes at 12 months is not known. PATIENTS/METHODS: In this randomized-controlled trial, 48 patients (mean age 50±21 years, 52% women) with acute IFDVT were randomized to conventional CDT (n=24) or ultrasound-assisted CDT (USAT; n=24)...
April 25, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28439953/feasibility-trial-for-primary-stroke-prevention-in-children-with-sickle-cell-anemia-in-nigeria-spin-trial
#5
Najibah Galadanci, Shehu Umar Abdullahi, Leah D Vance, Abdulkadir Musa Tabari, Shehi Ali, Raymond Belonwu, Auwal Salihu, Aisha Amal Galadanci, Binta Wudil Jibir, Halima Bello-Manga, Kathleen Neville, Fenella J Kirkham, Yu Shyr, Sharon Phillips, Brittany V Covert, Adetola A Kassim, Lori C Jordan, Muktar H Aliyu, Michael R DeBaun
The vast majority of children with sickle cell anemia (SCA) live in Africa, where evidence-based guidelines for primary stroke prevention are lacking. In Kano, Nigeria, we conducted a feasibility trial to determine the acceptability of hydroxyurea therapy for primary stroke prevention in children with abnormal transcranial Doppler (TCD) measurements. Children with SCA and abnormal non-imaging TCD measurements (≥ 200 cm/s) received moderate fixed-dose hydroxyurea therapy (∼20 mg/kg/day). A comparison group of children with TCD measurements < 200 cm/s was followed prospectively...
April 25, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28439721/incidence-of-thromboembolic-events-after-use-of-gelatin-thrombin-based-hemostatic-matrix-during-intracranial-tumor-surgery
#6
Roberto Gazzeri, Marcelo Galarza, Carlo Conti, Costanzo De Bonis
Association between the use of hemostatic agents made from collagen/gelatin mixed with thrombin and thromboembolic events in patients undergoing tumor resection has been suggested. This study evaluates the relationship between flowable hemostatic matrix and deep vein thrombosis in a large cohort of patients treated for brain tumor removal. The authors conducted a retrospective, multicenter, clinical review of all craniotomies for tumor removal performed between 2013 and 2014. Patients were classified in three groups: group I (flowable gelatin hemostatic matrix with thrombin), group II (gelatin hemostatic without thrombin), and group III (classical hemostatic)...
April 24, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28439485/treatment-of-atypical-hemolytic-uremic-syndrome-in-the-era-of-eculizumab
#7
Rawaa Ebrahem, Salam Kadhem, Quoc Truong
Hemolytic-uremic syndrome (HUS) is the triad of microangiopathic hemolytic anemia (MAHA), thrombocytopenia, and acute kidney injury (AKI); the main cause of multi-organ failure is related to thrombotic microangiopathy (TMA). Atypical HUS (aHUS) is a disease of uncontrolled complement activation associated with a high mortality rate and most cases progress to end-stage renal disease. About 50% of patients with this syndrome carry mutations in genes that encode complement proteins. Also, aHUS constitutes an over-activation of the complement pathway which is either inherited, acquired, or both...
March 23, 2017: Curēus
https://www.readbyqxmd.com/read/28438760/use-of-the-hyperinsulinemic-euglycemic-clamp-to-assess-insulin-sensitivity-in-guinea-pigs-dose-response-partitioned-glucose-metabolism-and-species-comparisons
#8
Dane M Horton, David A Saint, Julie A Owens, Kathryn L Gatford, Karen L Kind
The guinea pig is an alternate small animal model for the study of metabolism, including insulin sensitivity. However, only one study to date has reported the use of the hyperinsulinemic-euglycemic clamp (HEC) in anaesthetized animals in this species, and the dose-response has not been reported. We therefore characterized the dose-response curve for whole-body glucose uptake using recombinant human insulin in the adult guinea pig. Inter-species comparisons with published data showed species differences in maximal whole body responses (guinea pig ≈ human < rat < mouse), and the insulin concentrations at which half-maximal insulin responses occurred (guinea pig > human ≈ rat > mouse)...
April 24, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28438225/meta-analysis-of-the-parasitic-phase-traits-of-haemonchus-contortus-infection-in-sheep
#9
Mathilde Saccareau, Guillaume Sallé, Christèle Robert-Granié, Tom Duchemin, Philippe Jacquiet, Alexandra Blanchard, Jacques Cabaret, Carole R Moreno
BACKGROUND: The parasitic nematode Haemonchus contortus shows highly variable life history traits. This highlights the need to have an average estimate and a quantification of the variation around it to calibrate epidemiological models. METHODS: This paper aimed to quantify the main life history traits of H. contortus and to identify explanatory factors affecting these traits using a powerful method based on a systematic review and meta-analysis of current literature...
April 24, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28438118/predictors-of-delayed-culture-conversion-among-ugandan-patients
#10
Daniel Atwine, Patrick Orikiriza, Ivan Taremwa, Arnold Ayebare, Suzan Logoose, Juliet Mwanga-Amumpaire, Amina Jindani, Maryline Bonnet
BACKGROUND: Estimates of month-2 culture conversion, a proxy indicator of tuberculosis (TB) treatment efficacy in phase-2 trials can vary by culture-type and geographically with lower rates reported among African sites. The sub-study aimed at comparing TB detection rates of different culture media, within and across rifampicin-based regimens (R10, 15 and 20 mg/Kg) over a 6-month treatment follow-up period, and to establish predictors of month-2 culture non-conversion among HIV-negative TB patients enrolled at RIFATOX trial site in Uganda...
April 24, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28437864/linear-no-threshold-default-assumptions-are-unwarranted-for-cytotoxic-endpoints-independently-triggered-by-ultrasensitive-molecular-switches
#11
Kenneth T Bogen
Crump's response in this issue to my critique of linear-no-threshold (LNT) default assumptions for noncancer and nongenotoxic cancer risks (Risk Analysis 2016; 36(3):589-604) is rebutted herein. Crump maintains that distinguishing between a low-dose linear dose response and a threshold dose response on the basis of dose-response data is impossible even for endpoints involving increased cytotoxicity. My rebuttal relies on descriptions and specific illustrations of two well-characterized ultrasensitive molecular switches that govern two key cytoprotective responses to cellular stress-heat shock response and antioxidant response element activation, respectively-each of which serve to suppress stress-induced apoptotic cell death unless overwhelmed...
April 24, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28437565/relaxed-ordered-subset-preconditioned-alternating-projection-algorithm-for-pet-reconstruction-with-automated-penalty-weight-selection
#12
C Ross Schmidtlein, Yizun Lin, Si Li, Andrzej Krol, Bradley J Beattie, John L Humm, Yuesheng Xu
PURPOSE: Performance of the preconditioned alternating projection algorithm (PAPA) using relaxed ordered subsets (ROS) with a non-smooth penalty function was investigated in positron emission tomography (PET). A higher order total variation (HOTV) regularizer was applied and a method for unsupervised selection of penalty weights based on the measured data is introduced. METHODS: A ROS version of PAPA with HOTV penalty (ROS-HOTV-PAPA) for PET image reconstruction was developed and implemented...
April 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28437202/low-dose-morphine-for-dyspnea-in-terminally-ill-patients-with-idiopathic-interstitial-pneumonias
#13
Yoshinobu Matsuda, Isseki Maeda, Kazunobu Tachibana, Keiko Nakao, Yumiko Sasaki, Chikatoshi Sugimoto, Toru Arai, Akihiro Tokoro, Masanori Akira, Yoshikazu Inoue
BACKGROUND: Dyspnea is highly prevalent in patients with idiopathic interstitial pneumonias (IIPs). OBJECTIVE: The objective of this study is to examine the effectiveness and safety of continuous subcutaneous morphine for dyspnea in terminally ill IIP patients. SETTING/SUBJECTS: We retrospectively reviewed cases of terminally ill IIP patients who received continuous subcutaneous morphine for dyspnea. MEASUREMENTS: We reviewed dyspnea severity measured using numerical rating scale (NRS) and respiratory rate (RR) before and two and four hours after morphine initiation...
February 16, 2017: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/28437190/consuming-a-ketogenic-diet-while-receiving-radiation-and-chemotherapy-for-locally-advanced-lung-cancer-and-pancreatic-cancer-the-university-of-iowa-experience-of-two-phase-1-clinical-trials
#14
Amir Zahra, Melissa A Fath, Emyleigh Opat, Kranti A Mapuskar, Sudershan K Bhatia, Daniel C Ma, Samuel N Rodman Iii, Travis P Snyders, Catherine A Chenard, Julie M Eichenberger-Gilmore, Kellie L Bodeker, Logan Ahmann, Brian J Smith, Sandy A Vollstedt, Heather A Brown, Taher Abu Hejleh, Gerald H Clamon, Daniel J Berg, Luke I Szweda, Douglas R Spitz, John M Buatti, Bryan G Allen
Ketogenic diets are low in carbohydrates and high in fat, which forces cells to rely more heavily upon mitochondrial oxidation of fatty acids for energy. Relative to normal cells, cancer cells are believed to exist under a condition of chronic mitochondrial oxidative stress that is compensated for by increases in glucose metabolism to generate reducing equivalents. In this study we tested the hypothesis that a ketogenic diet concurrent with radiation and chemotherapy would be clinically tolerable in locally advanced non-small cell lung cancer (NSCLC) and pancreatic cancer and could potentially exploit cancer cell oxidative metabolism to improve therapeutic outcomes...
April 24, 2017: Radiation Research
https://www.readbyqxmd.com/read/28437188/further-characterization-of-the-mitigation-of-radiation-lethality-by-protective-wounding
#15
Joseph R Dynlacht, Joy Garrett, Rebecca Joel, Katharina Lane, Marc S Mendonca, Christie M Orschell
There continues to be a major effort in the United States to develop mitigators for the treatment of mass casualties that received high-intensity acute ionizing radiation exposures from the detonation of an improvised nuclear device during a radiological terrorist attack. The ideal countermeasure should be effective when administered after exposure, and over a wide range of absorbed doses. We have previously shown that the administration of a subcutaneous incision of a defined length, if administered within minutes after irradiation, protected young adult female C57BL/6 mice against radiation-induced lethality, and increased survival after total-body exposure to an LD50/30 X-ray dose from 50% to over 90%...
April 24, 2017: Radiation Research
https://www.readbyqxmd.com/read/28436974/high-dose-thiotepa-based-chemotherapy-with-autologous-stem-cell-support-in-elderly-patients-with-primary-central-nervous-system-lymphoma-a-european-retrospective-study
#16
E Schorb, C P Fox, K Fritsch, L Isbell, A Neubauer, A Tzalavras, R Witherall, S Choquet, O Kuittinen, D De-Silva, K Cwynarski, C Houillier, K Hoang-Xuan, V Touitou, N Cassoux, J-P Marolleau, J Tamburini, R Houot, V Delwail, G Illerhaus, C Soussain, B Kasenda
In this retrospective multicentre study, we investigated the outcomes of elderly primary central nervous system lymphoma (PCNSL) patients (⩾65 years) who underwent high-dose chemotherapy followed by autologous stem cell transplantation (HDT-ASCT) at 11 centres between 2003 and 2016. End points included remission, progression-free survival (PFS), overall survival (OS) and treatment-related mortality. We identified 52 patients (median age 68.5 years, median Karnofsky Performance Status before HDT-ASCT 80%) who all underwent thiotepa-based HDT-ASCT...
April 24, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28436634/-antiendotoxin-effect-of-jinhuaqingre-capsules
#17
Jiafu Hou, Leilei Wu, Yuting Cai, Changjiu Gao, Jindan An, Zhongcheng Yu
Objective: To investigate the anti-pyretic and anti-endotoxin effect of Chinese herb medicine Jinhuaqingre capsules. Methods: Thirty healthy male New Zealand rabbits with lipopolysaccharide-induced fever were divided into 5 groups (6 rabbits in each): animals in model group were given normal saline by gavage, animals in positive control group were given aspirin (0.2 g/kg), and animals in Jinhuaqingre groups were given Jinhuaqingre capsules 6.0, 3.0 or 1.5 g/kg, respectively. The changes in body temperature of rabbits were observed...
January 25, 2017: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28436582/phase-i-study-of-bortezomib-in-combination-with-irinotecan-in-patients-with-relapsed-refractory-high-risk-neuroblastoma
#18
Rajen Mody, Lili Zhao, Gregory Anthony Yanik, Valerie Opipari
PURPOSE: Prognosis for relapsed/refractory high-risk neuroblastoma (HR-NBL) remains poor. Bortezomib, a proteasome inhibitor, has shown preclinical activity against NBL as a single agent and in combination with cytotoxic chemotherapy including irinotecan. PATIENTS AND METHODS: Eighteen HR-NBL patients with primary refractory (n = 8) or relapsed (n = 10) disease were enrolled in a Phase I study using modified Time To Event Continual Reassessment Method. Bortezomib (1...
April 24, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28436395/phase-iib-study-of-intranasal-glutathione-in-parkinson-s-disease
#19
Laurie K Mischley, Richard C Lau, Eric G Shankland, Timothy K Wilbur, Jeannie M Padowski
BACKGROUND: Reduced glutathione (GSH) is an endogenously synthesized tripeptide depleted early in the course of Parkinson's disease (PD) and GSH augmentation has been proposed as a therapeutic strategy in PD. OBJECTIVE: This Phase IIb study was designed to evaluate whether a Phase III study of intranasal GSH, (in)GSH, for symptomatic relief is warranted and to determine the most appropriate trial design for a disease-modification study. METHODS: This was a double-blind, placebo-controlled trial of 45 individuals with Hoehn & Yahr Stage 1-3 PD...
April 20, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28436094/dosimetric-validation-of-a-magnetic-resonance-image-gated-radiotherapy-system-using-a-motion-phantom-and-radiochromic-film
#20
James M Lamb, John S Ginn, Dylan P O'Connell, Nzhde Agazaryan, Minsong Cao, David H Thomas, Yingli Yang, Mircea Lazea, Percy Lee, Daniel A Low
PURPOSE: Magnetic resonance image (MRI) guided radiotherapy enables gating directly on the target position. We present an evaluation of an MRI-guided radiotherapy system's gating performance using an MRI-compatible respiratory motion phantom and radiochromic film. Our evaluation is geared toward validation of our institution's clinical gating protocol which involves planning to a target volume formed by expanding 5 mm about the gross tumor volume (GTV) and gating based on a 3 mm window about the GTV...
April 24, 2017: Journal of Applied Clinical Medical Physics
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