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https://www.readbyqxmd.com/read/28822899/a-coupled-diffusion-fluid-pressure-model-to-predict-cell-density-distribution-for-cells-encapsulated-in-a-porous-hydrogel-scaffold-under-mechanical-loading
#1
Feihu Zhao, Ted J Vaughan, Myles J Mc Garrigle, Laoise M McNamara
Tissue formation within tissue engineering (TE) scaffolds is preceded by growth of the cells throughout the scaffold volume and attachment of cells to the scaffold substrate. It is known that mechanical stimulation, in the form of fluid perfusion or mechanical strain, enhances cell differentiation and overall tissue formation. However, due to the complex multi-physics environment of cells within TE scaffolds, cell transport under mechanical stimulation is not fully understood. Therefore, in this study, we have developed a coupled multiphysics model to predict cell density distribution in a TE scaffold...
August 3, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28820402/does-signaling-of-estrogen-related-receptors-affect-structure-and-function-of-bank-vole-leydig-cells
#2
P Pawlicki, A Milon, M Zarzycka, J Galas, W Tworzydlo, A Kaminska, L Pardyak, K Lesniak, A Pacwa, B Bilinska, E Gorowska-Wojtowicz, M Kotula-Balak
To get a deeper insight into the function of estrogen-related receptors (ERRs) and dissect underlying mechanism in Leydig cells, ERRs (type α, β and γ) were blocked or activated in testes of adult bank voles (Myodes glareolus) which show seasonal changes in the intratesticular sex hormones level. Both actively reproducing animals (long day conditions; LD) and those with regression of the reproductive system (short day conditions; SD) received intraperitoneal injections of selective ERRα antagonist 3-[4-(2,4-Bis-trifluoromethylbenzyloxy)-3-methoxyphenyl]-2-cyano-N-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl)acrylamide (XCT 790) or selective ERRβ/ERRγ agonist N-(4-(Diethylaminobenzylidenyl)-N'-(4-hydroxybenzoyl)-hydrazine (DY131) (50 μ/kg bw; six doses every other day)...
June 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28818762/reflector-guided-breast-tumor-localization-versus-wire-localization-for-lumpectomies-a-comparison-of-surgical-outcomes
#3
Sejal N Patel, Victoria L Mango, Priya Jadeja, Lauren Friedlander, Elise Desperito, Ralph Wynn, Sheldon Feldman, Richard Ha
PURPOSE: To compare surgical outcomes of SAVI SCOUT reflector localization (SSL) versus wire localization (WL) for breast tumors. METHODS: Retrospective review of 42 SSL cases and 42 WL cases. WL patients were consecutively matched for clinical-pathologic features. Final surgical outcome measures were tumor specimen volume, margin status, and re-excision rates. RESULTS: No significant differences were present in median specimen volumes (SSL-15...
August 1, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28816160/the-impact-of-cardiac-radiation-dosimetry-on-survival-after-radiation-therapy-for-non-small-cell-lung-cancer
#4
S Vivekanandan, D B Landau, N Counsell, D R Warren, A Khwanda, S D Rosen, E Parsons, Y Ngai, L Farrelly, L Hughes, M A Hawkins, J D Fenwick
PURPOSE: The heart receives high radiation doses during radiation therapy of advanced-stage lung cancer. We have explored associations between overall survival, cardiac radiation doses, and electrocardiographic (ECG) changes in patients treated in IDEAL-CRT, a trial of isotoxically escalated concurrent chemoradiation delivering tumor doses of 63 to 73 Gy. METHODS AND MATERIALS: Dosimetric and survival data were analyzed for 78 patients. The whole heart, pericardium, AV node, and walls of left and right atria (LA/RA-Wall) and ventricles (LV/RV-Wall) were outlined on radiation therapy planning scans, and differential dose-volume histograms (dDVHs) were calculated...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28816146/quality-assessment-of-stereotactic-radiosurgery-of-a-melanoma-brain-metastases-model-using-a-mouselike-phantom-and-the-small-animal-radiation-research-platform
#5
Cheng-Chia Wu, Kunal R Chaudhary, Yong Hum Na, David Welch, Paul J Black, Adam M Sonabend, Peter Canoll, Yvonne M Saenger, Tony J C Wang, Cheng-Shie Wuu, Tom K Hei, Simon K Cheng
PURPOSE: To establish a novel preclinical model for stereotactic radiosurgery (SRS) with combined mouselike phantom quality assurance in the setting of brain metastases. METHODS AND MATERIALS: C57B6 mice underwent intracranial injection of B16-F10 melanoma cells. T1-weighted postcontrast magnetic resonance imaging (MRI) was performed on day 11 after injection. The MRI images were fused with cone beam computed tomography (CBCT) images using the Small Animal Radiation Research Platform (SARRP)...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28815257/-effect-of-functional-appliance-on-upper-airway-in-adolescent-patients-with-skeletal-class-ii-malocclusion
#6
Xuan Li, Hui-Ling Zhou, Xin-Tian Lou, Zheng Hu, Gang Shen
PURPOSE: To investigate the effect of functional appliance on upper airway in adolescent patients with skeletal Class II malocclusion based on cone-beam CT (CBCT). METHODS: Thirty adolescent patients (male:female=1:1) with skeletal Class II malocclusion and their 30 counterparts with skeletal Class I malocclusion were selected. Skeletal Class II malocclusion patients were treated with Activator for 12 months on average, meanwhile skeletal Class I malocclusion patients were treated with fixed appliance without extraction...
April 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28812230/simulation-of-left-ventricular-dynamics-using-a-low-order-mathematical-model
#7
Michael J Moulton, Brian D Hong, Timothy W Secomb
The eventual goal of this study is to develop methods for estimating dynamic stresses in the left ventricle (LV) that could be used on-line in clinical settings, based on routinely available measurements. Toward this goal, a low-order theoretical model is presented, in which LV shape is represented using a small number of parameters, allowing rapid computational simulations of LV dynamics. The LV is represented as a thick-walled prolate spheroid containing helical muscle fibers with nonlinear passive and time-dependent active contractile properties...
August 15, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/28812201/effectiveness-of-navigation-guided-cyst-aspiration-before-resection-of-large-cystic-brain-tumors-a-proof-of-concept-for-more-radical-surgery
#8
Tae Hoon Roh, Kyoung Su Sung, Seok-Gu Kang, Ju Hyung Moon, Eui Hyun Kim, Sun Ho Kim, Jong Hee Chang
BACKGROUND: Resection of tumors close to the corticospinal tract (CST) carries a high risk of damage to the CST. For cystic tumors, aspirating the cyst before resection may reduce the risk of damage to vital structures. This study evaluated the effectiveness of cyst aspiration, by comparing the results before and after aspiration of diffusion tensor image (DTI) tractography. METHODS: This study enrolled 23 patients with large cystic brain tumors (>20 cm(3)) between 2012 and 2016...
August 16, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28810963/treating-decompression-sickness-military-flight-simulation-site-community-hospital-partnership
#9
Whitney C Rhodes, George Hertner, Robert Price, Lani Finck, Claudia Temmer, Tracy Cushing, Kathleen Flarity
BACKGROUND: High-altitude flight simulation familiarizes military trainees with the symptoms of hypoxia to prepare them for emergency situations. Decompression sickness (DCS) can occur as a result of these simulations. In cases when ground-level supplemental oxygen does not resolve symptoms, hyperbaric oxygen (HBO) therapy is indicated. Many military hyperbaric chambers have been closed because of cost reductions, necessitating partnerships with community hospitals to ensure access to treatment...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810831/application-of-a-bayesian-non-linear-model-hybrid-scheme-to-sequence-data-for-genomic-prediction-and-qtl-mapping
#10
Tingting Wang, Yi-Ping Phoebe Chen, Iona M MacLeod, Jennie E Pryce, Michael E Goddard, Ben J Hayes
BACKGROUND: Using whole genome sequence data might improve genomic prediction accuracy, when compared with high-density SNP arrays, and could lead to identification of casual mutations affecting complex traits. For some traits, the most accurate genomic predictions are achieved with non-linear Bayesian methods. However, as the number of variants and the size of the reference population increase, the computational time required to implement these Bayesian methods (typically with Monte Carlo Markov Chain sampling) becomes unfeasibly long...
August 15, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28808745/parathyroid-hormone-1-34-promotes-fracture-healing-in-ovariectomized-rats-with-type-2-diabetes-mellitus
#11
G Y Liu, G L Cao, F M Tian, H P Song, L L Yuan, L D Geng, Z Y Zheng, L Zhang
Ovariectomized (OVX) rats with type 2 diabetes mellitus (T2DM) with femur fracture received vehicle, insulin, or insulin plus parathyroid hormone (PTH) treatment for 2 and 3 weeks. Radiography, histomorphometry, histology, and immunohistochemistry in callus were evaluated. INTRODUCTION: Reports about effects of PTH plus insulin on callus formation of osteoporotic fracture with T2DM were limited. This study was designed to investigate the effects of the combination of PTH and insulin on fracture healing in OVX rats with T2DM...
August 14, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28808265/study-of-dynamical-heterogeneities-in-colloidal-nanoclay-suspensions-approaching-dynamical-arrest
#12
Paramesh Gadige, Debasish Saha, Sanjay Kumar Behera, Ranjini Bandyopadhyay
The dynamics of aqueous Laponite clay suspensions slow down with increasing sample waiting time (t w ). This behavior, and the material fragility that results, closely resemble the dynamical slowdown in fragile supercooled liquids with decreasing temperature, and are typically ascribed to the increasing sizes of distinct dynamical heterogeneities in the sample. In this article, we characterize the dynamical heterogeneities in Laponite suspensions by invoking the three-point dynamic susceptibility formalism...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807986/a-turbine-driven-ventilator-improves-adherence-to-advanced-cardiac-life-support-guidelines-during-a-cardiopulmonary-resuscitation-simulation
#13
Scott G Allen, Lara Brewer, Erik S Gillis, Nathan L Pace, Derek J Sakata, Joseph A Orr
BACKGROUND: Research has shown that increased breathing frequency during cardiopulmonary resuscitation is inversely correlated with systolic blood pressure. Rescuers often hyperventilate during cardiopulmonary resuscitation (CPR). Current American Heart Association advanced cardiac life support recommends a ventilation rate of 8 -10 breaths/min. We hypothesized that a small, turbine-driven ventilator would allow rescuers to adhere more closely to advanced cardiac life support (ACLS) guidelines...
August 14, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28806622/case-report-on-the-non-operative-management-of-a-retrievable-inferior-vena-cava-filter-perforating-the-duodenum
#14
Joseph S Fernandez-Moure, Keemberly Kim, M Haseeb Zubair, Wade R Rosenberg
INTRODUCTION: Deep vein thrombosis (DVT) continues to be a significant source of morbidity for surgical patients. Placement of a retrievable inferior vena cava (IVC) filter is used when patients have contraindications to anticoagulation or recurrent pulmonary embolism despite therapeutic anticoagulation. Although retrievable IVC filters are often used, they carry a unique set of risks. PRESENTATION OF CASE: A 67-year-old man presents to the Emergency Room (ER) following large volume melena and complaining of syncope...
July 10, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28804517/update-on-the-role-of-nanoliposomal-irinotecan-in-the-treatment-of-metastatic-pancreatic-cancer
#15
REVIEW
Fnu Asad Ur Rahman, Saeed Ali, Muhammad Wasif Saif
Median survival for patients with metastatic pancreatic cancer (MPC) treated with combination chemotherapeutic agents such as gemcitabine-based regimens and FOLFIRINOX is currently less than 12 months. This highlights the need for more efficacious first-line, as well as second-line therapies. Nanoliposomal irinotecan, in combination with 5-fluorouracil (5-FU)/folinic acid has recently been assessed as second-line therapy after initial gemcitabine-based therapy. It is the first, second-line treatment approved by the US Food and Drug Administration to treat patients with MPC based on results of the NAnoliPOsomaL Irinotecan (NAPOLI-1) study, which showed that this regimen significantly prolonged progression-free survival (3...
July 2017: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/28803402/actin-filaments-regulate-the-adhesion-between-the-plasma-membrane-and-the-cell-wall-of-tobacco-guard-cells
#16
Qin Yu, Jing-Jing Ren, Lan-Jing Kong, Xiu-Ling Wang
During the opening and closing of stomata, guard cells undergo rapid and reversible changes in their volume and shape, which affects the adhesion of the plasma membrane (PM) to the cell wall (CW). The dynamics of actin filaments in guard cells are involved in stomatal movement by regulating structural changes and intracellular signaling. However, it is unclear whether actin dynamics regulate the adhesion of the PM to the CW. In this study, we investigated the relationship between actin dynamics and PM-CW adhesion by the hyperosmotic-induced plasmolysis of tobacco guard cells...
August 13, 2017: Protoplasma
https://www.readbyqxmd.com/read/28801918/motion-compensation-in-the-region-of-the-coronary-arteries-based-on-partial-angle-reconstructions-from-short-scan-ct-data
#17
Juliane Hahn, Herbert Bruder, Christopher Rohkohl, Thomas Allmendinger, Karl Stierstorfer, Thomas Flohr, Marc Kachelrieß
PURPOSE: In order to mitigate motion-induced artifacts, several motion compensation (MoCo) methods have been developed, which are either able to a) compensate for severe artifacts, but utilize the data for the reconstruction of several cardiac phases, or b) improve image quality of a single reconstruction with only moderate motion artifacts. We propose a method combining both benefits: dose efficiency by utilizing only the data needed for a single short-scan reconstruction while still being able to compensate for severe artifacts...
August 12, 2017: Medical Physics
https://www.readbyqxmd.com/read/28801280/-regression-analysis-of-red-cell-distribution-width-and-mean-platelet-volume-in-patients-with-acute-myocardial-infarction
#18
Qi Liang, Xin-Jun Lei, Hong-Bing Li, Yang-Rong Yin, Jie Ren, Li-Hong Fan, Xin Huang, Zu-Yi Yuan
OBJECTIVE: To investigate clinical implications of changes in red cell distribution width (RDW) and mean platelet volume (MPV) in patients with acute myocardial infarction. METHODS: A total of 127 patients (90 men and 37 women) were enrolled in this analysis, including 66 with acute myocardial infarction (AMI) and 61 with unstable angina (UA). The patients' baseline demographic and clinical data were compared between the two groups including age, hypertension, diabetes, smoking, BMI, blood biochemical profiles, cardiac functions and platelet and red blood cell parameters...
August 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28800952/the-best-single-measurement-for-assessing-splenomegaly-in-patients-with-cirrhotic-liver-morphology
#19
Zachary Nuffer, Thomas Marini, Andrey Rupasov, Stephen Kwak, Shweta Bhatt
RATIONALE AND OBJECTIVES: There is little agreement within the radiology literature as to the best single measurement for assessing splenomegaly. In this study, we evaluate the correlation of multiple unidirectional measurements of the spleen with splenic volume in patients with cirrhotic liver morphology on computed tomography (CT). MATERIALS AND METHODS: Splenic volume was retrospectively calculated from CT examinations of 179 adult patients, 47 of whom were approved as renal donors, and 132 of whom were referred for various other indications, and were found to have cirrhotic liver morphology on CT...
August 8, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28800785/mir-26b-mimic-inhibits-glioma-proliferation-in-vitro-and-in-vivo-suppressing-cox-2-expression
#20
Zheng-Gang Chen, Chuan-Yi Zheng, Wang-Qing Cai, Da-Wei Li, Fu-Yue Ye, Jian Zhou, Ran Wu, Kun Yang
Glioma is the most common malignant tumor of the nervous system. Studies have shown the microRNA (miR)-26b/cyclooxygenase (COX)-2 axis in the development and progression in many tumor cells. Our study aims to investigate the effect and mechanism of miR-26b/COX-2 axis in glioma. Decreased expression of miR-26b with increased level of COX-2 was found in glioma tissues compared with matched normal tissues. A strong negative correlation was observed between the level of miR-26b and COX-2 in 30 glioma tissues. The miR-26b was then overexpressed by transfecting miR-26b mimic into U-373 cells...
August 11, 2017: Oncology Research
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