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https://www.readbyqxmd.com/read/28944346/falx-cerebri-segmentation-via-multi-atlas-boundary-fusion
#1
Jeffrey Glaister, Aaron Carass, Dzung L Pham, John A Butman, Jerry L Prince
The falx cerebri is a meningeal projection of dura in the brain, separating the cerebral hemispheres. It has stiffer mechanical properties than surrounding tissue and must be accurately segmented for building computational models of traumatic brain injury. In this work, we propose a method to segment the falx using T1-weighted magnetic resonance images (MRI) and susceptibility-weighted MRI (SWI). Multi-atlas whole brain segmentation is performed using the T1-weighted MRI and the gray matter cerebrum labels are extended into the longitudinal fissure using fast marching to find an initial estimate of the falx...
September 2017: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/28943701/automatic-falx-cerebri-and-tentorium-cerebelli-segmentation-from-magnetic-resonance-images
#2
Jeffrey Glaister, Aaron Carass, Dzung L Pham, John A Butman, Jerry L Prince
The falx cerebri and tentorium cerebelli are dural structures found in the brain. Due to the roles both structures play in constraining brain motion, the falx and tentorium must be identified and included in finite element models of the head to accurately predict brain dynamics during injury events. To date there has been very little research work on automatically segmenting these two structures, which is understandable given that their 1) thin structure challenges the resolution limits of in vivo 3D imaging, and 2) contrast with respect to surrounding tissue is low in standard magnetic resonance imaging...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28942647/pore-breathing-of-metal-organic-frameworks-by-environmental-transmission-electron-microscopy
#3
Lucas R Parent, Huy Pham, Joseph P Patterson, Michael S Denny, Seth M Cohen, Nathan C Gianneschi, Francesco Paesani
Metal-organic frameworks (MOFs) have emerged as an effective platform for the rational design of multifunctional materials, combining large specific surface areas with flexible, periodic frameworks that can undergo reversible structural transitions, or "breathing", upon temperature and pressure changes, and through gas adsorption/desorption processes. Although MOF breathing can be inferred from the analysis of adsorption isotherms, direct observation of the structural transitions has been lacking, and the underlying processes of framework-reorganization in individual MOF nanocrystals is largely unknown...
September 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28942323/the-quest-for-more-research-on-painful-diabetic-neuropathy
#4
P P Nawroth, M Bendszus, M Pham, J Jende, S Heiland, S Ries, C Schumann, M Schmelz, S Schuh-Hofer, R D Treede, R Kuner, D Oikonomou, J B Groener, S Kopf
A 62-year-old diabetologist diagnosed himself to have diabetes type-2, with an HbA1c of 9.5. Five months after lifestyle intervention and a multi-drug approach, HbA1c was 6.3, systolic blood pressure was below 135 mmHg and BMI reduced to 27. But he suffered from severe painful diabetic neuropathy. Therefore he decided to visit his friend, a famous neuroscientist at an even more famous university. He asked him several plain questions: 1. What is the natural course of painful diabetic neuropathy? 2. Why do I have, despite almost normalizing HbA1c, more problems than before? 3...
September 20, 2017: Neuroscience
https://www.readbyqxmd.com/read/28941940/mortality-prediction-in-stable-hemodialysis-patients-is-refined-by-ykl-40-a-40-kda-glycoprotein-associated-with-inflammation
#5
Georg Lorenz, Michael Schmalenberg, Stephan Kemmner, Bernhard Haller, Dominik Steubl, Dang Pham, Anita Schreiegg, Quirin Bachmann, Alina Schmidt, Sandra Haderer, Monika Huber, Susanne Angermann, Roman Günthner, Matthias Braunisch, Christine Hauser, Anna-Lena Reichelt, Julia Matschkal, Yana Suttmann, Philipp Moog, Konrad Stock, Claudius Küchle, Klaus Thürmel, Lutz Renders, Axel Bauer, Marcus Baumann, Uwe Heemann, Peter B Luppa, Christoph Schmaderer
Chronic inflammation contributes to increased mortality in hemodialysis (HD) patients. YKL-40 is a novel marker of inflammation, tissue remodeling, and highly expressed in macrophages inside vascular lesions. Elevated levels of YKL-40 have been reported for HD patients but how it integrates into the proinflammatory mediator network as a predictor of mortality remains elusive. We studied serum YKL-40, Interleukin-6 (IL-6), high-sensitivity C-reactive protein, monocyte chemotactic protein-1 (MCP-1), and interferon-gamma induced protein-10 (IP-10) in 475 chronic hemodialysis patients...
September 20, 2017: Kidney International
https://www.readbyqxmd.com/read/28940538/androgenic-to-estrogenic-switch-in-human-adult-prostate-gland-is-regulated-by-epigenetic-silencing-of-steroid-5%C3%AE-reductase-2
#6
Zongwei Wang, Libing Hu, Keyan Salari, Seth Bechis, Rongbin Ge, Shulin Wu, Cyrus Rassoulian, Jonathan Pham, Chin-Lee Wu, Shahin Tabatabaei, Strand W Douglas, Aria F Olumi
Benign prostatic hyperplasia (BPH) is the most common proliferative abnormality of the prostate. While all men experience some prostate growth as they age, the rate of growth varies among individuals. Steroid 5α-reductase 2 (SRD5A2) is a critical enzyme for prostatic development and growth. Previous work indicates that one-third of adult prostate samples do not express SRD5A2, secondary to epigenetic modifications. Here we show that estradiol is dramatically elevated, concomitant with significantly upregulated estrogen response genes, in prostate samples that are methylated at the SRD5A2 promoter...
September 20, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28940125/responses-of-an-american-eel-brain-endothelial-like-cell-line-to-selenium-deprivation-and-to-selenite-selenate-and-selenomethionine-additions-in-different-exposure-media
#7
Sophia R Bloch, John J Kim, Phuc H Pham, Peter V Hodson, Lucy E J Lee, Niels C Bols
The effect of selenium deprivation and addition on the American eel brain endothelial cell line (eelB) was studied in three exposure media: complete growth medium (L15/FBS), serum-free medium (L15), and minimal medium (L15/ex). L15/ex contains only galactose and pyruvate and allowed the deprivation of selenium on cells to be studied. In L15/ex, without any obvious source of selenium, eelB cells survived for at least 7 d, formed capillary-like structures (CLS) on Matrigel, and migrated to heal wounds. Three selenium compounds were added to cultures: selenite, selenate, and selenomethionine (SeMet)...
September 22, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28937764/is-vitamin-a-an-antioxidant-or-a-prooxidant
#8
Duy Quang Dao, Thi Chinh Ngo, Nguyen Minh Thong, Pham Cam Nam
Antioxidant efficiency of all-trans-retinol has been studied on the basis of characteristic thermochemical properties using density functional theory. The influence of the solvent polarity has also been evaluated. It is found that retinol may act in parallel as an effective antioxidant via H-atom donating as well as a prooxidant in yielding reactive hydroxyl radical. In fact, the lowest values of bond dissociation enthalpy were found at C18-H and C18-OH positions. Retinol was also determined as good electron donor but bad acceptor in the single electron transfer (ET) reaction with hydroperoxyl (HOO●) radical...
September 22, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28937458/transpedicular-corpectomy-and-cage-placement-in-the-treatment-of-traumatic-lumbar-burst-fractures
#9
Martin H Pham, Alexander Tuchman, Thomas C Chen, Frank L Acosta, Patrick C Hsieh, John C Liu
STUDY DESIGN: Retrospective review. OBJECTIVE: To review the feasibility of a posterior-only approach for instrumented reconstruction in lumbar burst fractures. BACKGROUND: Burst fractures of the lumbar spine have been treated through a variety of techniques, including anterior, posterior, or combined approaches. Here we review series of patients undergoing posterior-only transpedicular corpectomy with instrumented fusion for traumatic lumbar burst fracture...
October 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28936713/manual-removal-of-primary-posterior-capsular-plaques-using-retinal-end-grasping-forceps
#10
Gennady Landa, Khoa Pham
INTRODUCTION: Primary posterior capsular plaques can be highly adherent to the posterior capsule leading to possible posterior capsular rupture during attempted removal. Here we describe a novel method for posterior capsular plaque removal using a technique inspired by the experience of retina surgeon in the peeling of membranes from the posterior pole. METHODS: Retinal end-grasping forceps were used to peel the plaque from the posterior capsule. RESULTS: We have performed this technique on 12 eyes with successful removal of the posterior capsular plaque in all instances without compromise of the posterior capsule in any case...
September 21, 2017: Ophthalmology and Therapy
https://www.readbyqxmd.com/read/28934457/highly-pathogenic-avian-influenza-a-h5n1-viruses-at-the-animal-human-interface-in-vietnam-2003-2010
#11
Adrian Creanga, Nguyen Le Khanh Hang, Vuong Duc Cuong, Ha T Nguyen, Hoang Vu Mai Phuong, Le Thi Thanh, Nguyen Co Thach, Pham Thi Hien, Nguyen Tung, Yunho Jang, Amanda Balish, Nguyen Hoang Dang, Mai Thuy Duong, Ngo Thu Huong, Do Ngoc Hoa, Nguyen Dang Tho, Alexander Klimov, Bryan K Kapella, Larisa Gubareva, James C Kile, Nguyen Tran Hien, Le Quynh Mai, C Todd Davis
Mutation and reassortment of highly pathogenic avian influenza A(H5N1) viruses at the animal-human interface remain a major concern for emergence of viruses with pandemic potential. To understand the relationship of H5N1 viruses circulating in poultry and those isolated from humans, comprehensive phylogenetic and molecular analyses of viruses collected from both hosts in Vietnam between 2003 and 2010 were performed. We examined the temporal and spatial distribution of human cases relative to H5N1 poultry outbreaks and characterized the genetic lineages and amino acid substitutions in each gene segment identified in humans relative to closely related viruses from avian hosts...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28933705/durability-of-antiretroviral-therapy-regimens-and-determinants-for-change-in-hiv-1-infected-patients-in-the-treat-asia-hiv-observational-database-tahod-lite
#12
Rosario Martinez-Vega, Nicole L De La Mata, Nagalingeswaran Kumarasamy, Penh Sun Ly, Kinh Van Nguyen, Tuti P Merati, Thi Thanh Pham, Man Po Lee, Jun Yong Choi, Jeremy L Ross, Oon Tek Ng
BACKGROUND: The durability of first line regimen is important to achieve long term treatment success for the management of HIV infection. Our analysis describes the duration of sequential ART regimens and identifies the determinants leading to treatment change in HIV-positive patients initiating in Asia. METHODS: All HIV-positive adult patients initiating first-line ART in 2003-2013, from eight clinical sites among seven countries in Asia. Patient follow-up was to May 2014...
September 21, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28932872/self-efficacy-and-barriers-to-disaster-evacuation-in-hong-kong
#13
Elizabeth A Newnham, Satchit Balsari, Rex Pui Kin Lam, Shraddha Kashyap, Phuong Pham, Emily Y Y Chan, Kaylie Patrick, Jennifer Leaning
OBJECTIVES: To investigate specific challenges to Hong Kong's capacity for effective disaster response, we assessed perceived barriers to evacuation and citizens' self-efficacy. METHODS: Global positioning system software was used to determine random sampling locations across Hong Kong, weighted by population density. The resulting sample of 1023 participants (46.5% female, mean age 40.74 years) were invited to complete questionnaires on emergency preparedness, barriers to evacuation and self-efficacy...
September 20, 2017: International Journal of Public Health
https://www.readbyqxmd.com/read/28932482/crystal-structure-of-4-amino-3-thio-phen-3-ylmeth-yl-1h-1-2-4-triazole-5-4h-thione
#14
Trung Vu Quoc, Linh Nguyen Ngoc, Vy Do Truc, Linh Duong Khanh, Hung Ha Manh, Chien Thang Pham, Luc Van Meervelt
In the title compound, C7H8N4S2, the thio-phene ring shows rotational disorder over two orientations in a 0.6957 (15):0.3043 (15) ratio. The plane of the 1,2,4-triazole ring makes a dihedral angle of 75.02 (17)° with the major-disorder component of the thiophene ring. In the crystal, two types of inversion dimers, described by the graph-set motifs R2(2)(8) and R2(2)(10), are formed by N-H⋯S inter-actions. Chains of mol-ecules running in the [101] direction are linked by weaker N-H⋯N inter-actions...
September 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28930228/interaction-of-plant-extracts-with-central-nervous-system-receptors
#15
REVIEW
Kenneth Lundstrom, Huyen Thanh Pham, Long Doan Dinh
Background: Plant extracts have been used in traditional medicine for the treatment of various maladies including neurological diseases. Several central nervous system receptors have been demonstrated to interact with plant extracts and components affecting the pharmacology and thereby potentially playing a role in human disease and treatment. For instance, extracts from Hypericum perforatum (St. John's wort) targeted several CNS receptors. Similarly, extracts from Piper nigrum, Stephania cambodica, and Styphnolobium japonicum exerted inhibition of agonist-induced activity of the human neurokinin-1 receptor...
February 23, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28929035/porcine-urinary-bladder-matrix-for-management-of-infected-radiation-mastectomy-wound
#16
Yana Puckett, Theophilus Pham, Shirley McReynolds, Catherine A Ronaghan
We present a case report on the successful healing of a Pseudomonas infection wound in a 52-year-old female with morbid obesity, noninsulin dependent diabetes mellitus and a history of tobacco use, who presented with Stage IIIA (T3, N2, Mo) infiltrating ductal carcinoma. The patient received neoadjuvant chemotherapy prior to her bilateral skin-sparing total mastectomies with right axillary sentinel lymphadenectomy. She also had staged reconstruction with temporary breast implants and plans for deep inferior epigastric perforator flaps...
July 10, 2017: Curēus
https://www.readbyqxmd.com/read/28928958/exploring-vietnamese-co-authorship-patterns-in-social-sciences-with-basic-network-measures-of-2008-2017-scopus-data
#17
Tung Manh Ho, Ha Viet Nguyen, Thu-Trang Vuong, Quang-Minh Dam, Hiep-Hung Pham, Quan-Hoang Vuong
Background: Collaboration is a common occurrence among Vietnamese scientists; however, insights into Vietnamese scientific collaborations have been scarce. On the other hand, the application of social network analysis in studying science collaboration has gained much attention all over the world. The technique could be employed to explore Vietnam's scientific community. Methods: This paper employs network theory to explore characteristics of a network of 412 Vietnamese social scientists whose papers can be found indexed in the Scopus database...
2017: F1000Research
https://www.readbyqxmd.com/read/28928711/validation-of-a-step-detection-algorithm-during-straight-walking-and-turning-in-patients-with-parkinson-s-disease-and-older-adults-using-an-inertial-measurement-unit-at-the-lower-back
#18
Minh H Pham, Morad Elshehabi, Linda Haertner, Silvia Del Din, Karin Srulijes, Tanja Heger, Matthis Synofzik, Markus A Hobert, Gert S Faber, Clint Hansen, Dina Salkovic, Joaquim J Ferreira, Daniela Berg, Álvaro Sanchez-Ferro, Jaap H van Dieën, Clemens Becker, Lynn Rochester, Gerhard Schmidt, Walter Maetzler
INTRODUCTION: Inertial measurement units (IMUs) positioned on various body locations allow detailed gait analysis even under unconstrained conditions. From a medical perspective, the assessment of vulnerable populations is of particular relevance, especially in the daily-life environment. Gait analysis algorithms need thorough validation, as many chronic diseases show specific and even unique gait patterns. The aim of this study was therefore to validate an acceleration-based step detection algorithm for patients with Parkinson's disease (PD) and older adults in both a lab-based and home-like environment...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28928383/human-stem-cells-alter-the-invasive-properties-of-somatic-cells-via-paracrine-activation-of-mtorc1
#19
Margit Rosner, Ha Thi Thanh Pham, Richard Moriggl, Markus Hengstschläger
Controlled invasion is essential during many physiological processes, whereas its deregulation is a hallmark of cancer. Here we demonstrate that embryonic, induced pluripotent and amniotic fluid stem cells share the property to induce the invasion of primary somatic cells of various origins through insulin-like growth factor I (IGF-I)- or II (IGF-II)-mediated paracrine activation of mechanistic target of rapamycin complex 1 (mTORC1). We propose a model in which downstream of mTORC1 this stem cell-induced invasion is mediated by hypoxia-inducible factor 1-alpha (HIF-1α)-regulated matrix metalloproteinases...
September 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28925262/magnetic-properties-of-cofe2o4-thin-films-synthesized-by-radical-enhanced-atomic-layer-deposition
#20
Calvin D Pham, Jeffrey Chang, Mark A Zurbuchen, Jane P Chang
A radical enhanced atomic layer deposition (RE-ALD) process was developed for growing ferrimagnetic CoFe2O4 thin films. By utilizing bis(2,2,6,6-tetramethyl-3,5-heptanedionato) cobalt (II) (Co(TMHD)2), Fe(TMHD)3, and atomic oxygen as the metal and oxidation sources respectively, amorphous and stoichiometric CoFe2O4 films were deposited onto SrTiO3 (001) substrates at 200 °C. The RE-ALD growth rate obtained for CoFe2O4 is ~2.4 Å/supercycle, significantly higher than the values reported for thermally activated ALD processes...
September 19, 2017: ACS Applied Materials & Interfaces
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