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David Chen

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https://www.readbyqxmd.com/read/29785014/3-utr-shortening-represses-tumor-suppressor-genes-in-trans-by-disrupting-cerna-crosstalk
#1
Hyun Jung Park, Ping Ji, Soyeon Kim, Zheng Xia, Benjamin Rodriguez, Lei Li, Jianzhong Su, Kaifu Chen, Chioniso P Masamha, David Baillat, Camila R Fontes-Garfias, Ann-Bin Shyu, Joel R Neilson, Eric J Wagner, Wei Li
Widespread mRNA 3' UTR shortening through alternative polyadenylation 1 promotes tumor growth in vivo 2 . A prevailing hypothesis is that it induces proto-oncogene expression in cis through escaping microRNA-mediated repression. Here we report a surprising enrichment of 3'UTR shortening among transcripts that are predicted to act as competing-endogenous RNAs (ceRNAs) for tumor-suppressor genes. Our model-based analysis of the trans effect of 3' UTR shortening (MAT3UTR) reveals a significant role in altering ceRNA expression...
May 21, 2018: Nature Genetics
https://www.readbyqxmd.com/read/29784623/regional-myocardial-strain-measurements-from-4dct-in-patients-with-normal-lv-function
#2
Elliot R McVeigh, Amir Pourmorteza, Michael Guttman, Veit Sandfort, Francisco Contijoch, Suhas Budhiraja, Zhennong Chen, David A Bluemke, Marcus Y Chen
BACKGROUND: CT SQUEEZ is a new automated technique to evaluate regional endocardial strain by tracking features on the endocardium from 4D cine CT data. The objective of this study was to measure the range of endocardial regional strain (RSCT ) values obtained with CT SQUEEZ in the normal human left ventricle (LV) from standard clinical 4D coronary CTA exams. METHODS: RSCT was measured over the heart cycle in 25 humans with normal LV function using cine CT from three vendors...
May 9, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29784191/outcomes-of-robot-assisted-partial-nephrectomy-for-clinical-t2-renal-tumors-a-multicenter-analysis-rosula-collaborative-group
#3
Riccardo Bertolo, Riccardo Autorino, Giuseppe Simone, Ithaar Derweesh, Juan D Garisto, Andrea Minervini, Daniel Eun, Sisto Perdona, James Porter, Koon Ho Rha, Alexander Mottrie, Wesley M White, Luigi Schips, Bo Yang, Kenneth Jacobsohn, Robert G Uzzo, Ben Challacombe, Matteo Ferro, Jay Sulek, Umberto Capitanio, Uzoma A Anele, Gabriele Tuderti, Manuela Costantini, Stephen Ryan, Ahmet Bindayi, Andrea Mari, Marco Carini, Aryeh Keehn, Giuseppe Quarto, Michael Liao, Kidon Chang, Alessandro Larcher, Geert De Naeyer, Ottavio De Cobelli, Francesco Berardinelli, Chao Zhang, Peter Langenstroer, Alexander Kutikov, David Chen, Nicolo De Luyk, Chandru P Sundaram, Francesco Montorsi, Robert J Stein, Georges Pascal Haber, Lance J Hampton, Prokar Dasgupta, Michele Gallucci, Jihad Kaouk, Francesco Porpiglia
BACKGROUND: While partial nephrectomy (PN) represents the standard surgical management for cT1 renal masses, its role for cT2 tumors is controversial. Robot-assisted PN (RAPN) is being increasingly implemented worldwide. OBJECTIVE: To analyze perioperative, functional, and oncological outcomes of RAPN for cT2 tumors. DESIGN, SETTING, AND PARTICIPANTS: Retrospective analysis of a large multicenter, multinational dataset of patients with nonmetastatic cT2 masses treated with robotic surgery (ROSULA: RObotic SUrgery for LArge renal mass)...
May 18, 2018: European Urology
https://www.readbyqxmd.com/read/29783043/developmental-changes-in-the-perception-of-visuotactile-simultaneity
#4
Yi-Chuan Chen, Terri L Lewis, David I Shore, Charles Spence, Daphne Maurer
A simultaneity judgment (SJ) task was used to measure the developmental trajectory of visuotactile simultaneity perception in children (aged 7, 9, 11, and 13 years) and adults. Participants were presented with a visual flash in the center of a computer monitor and a tap on their right index finger (located 20° below the flash) with 13 possible stimulus onset asynchronies (SOAs). Participants reported whether the flash and tap were presented at the same time. Compared with the adult group, children aged 7 and 9 years made more simultaneous responses when the tap led by more than 300 ms and when the flash led by more than 200 ms, whereas they made fewer simultaneous responses at the 0 ms SOA...
May 18, 2018: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/29779669/synthesis-and-profiling-of-benzylmorpholine-1-2-4-5-tetraoxane-analogue-n205-towards-tetraoxane-scaffolds-with-potential-for-single-dose-cure-of-malaria
#5
Paul M O' Neill, Paul A Stocks, Sunil Sabbani, Natalie L Roberts, Richard K Amewu, Emma R Shore, Ghaith Aljayyoussi, Iñigo Angulo-Barturén, María Belén, Jiménez-Díaz, Santiago Ferrer Bazaga, María Santos Martínez, Brice Campo, Raman Sharma, Susan A Charman, Eileen Ryan, Gong Chen, David M Shackleford, Jill Davies, Gemma L Nixon, Giancarlo A Biagini, Stephen A Ward
A series of aryl carboxamide and benzylamino dispiro 1,2,4,5-tetraoxane analogues have been designed and synthesized in a short synthetic sequence from readily available starting materials. From this series of endoperoxides, molecules with in vitro IC50s versus Plasmodium falciparum (3D7) as low as 0.84 nM were identified. Based on an assessment of blood stability and in vitro microsomal stability, N205 (10a) was selected for rodent pharmacokinetic and in vivo antimalarial efficacy studies in the mouse Plasmodium berghei and Plasmodium falciparum Pf3D70087/N9 severe combined immunodeficiency (SCID) mouse models...
May 17, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29779398/handoff-tool-enabling-standardized-transitions-between-the-emergency-department-and-the-hospitalist-inpatient-service-at-a-major-cancer-center
#6
Carmen E Gonzalez, Norman Brito-Dellan, Srinivas R Banala, David Rubio, Mohamed Ait Aiss, Terry W Rice, Karen Chen, Diane C Bodurka, Carmelita P Escalante
Communication failures during patient handoff can lead to serious errors. A quality improvement team created a standardized handoff tool/process (DE-PASS: Decisive problem requiring admission, Evaluation time, Patient summary, Acute issues/action list, Situation unfinished/awareness, Signed out to) for admitting patients from the emergency department (ED) to the hospitalist inpatient service of a tertiary cancer center. DE-PASS mirrors the institution's ED workflow, stratifies patients as stable/urgent/emergent, and establishes requirements for verbal and email communications between providers...
May 1, 2018: American Journal of Medical Quality: the Official Journal of the American College of Medical Quality
https://www.readbyqxmd.com/read/29778942/transcriptomic-and-methylomic-analysis-reveal-the-toxicological-effect-of-2-3-7-8-tetrachlorodibenzodioxin-on-human-embryonic-stem-cell
#7
Keng Po Lai, Jing Woei Li, Ting Fung Chan, Andy Chen, Cherie Yin Lau Lee, William Shu Biu Yeung, Chris Kong Chu Wong
Cumulating epidemiological studies demonstrated that environmental exposure to endocrine disrupting chemicals (EDCs) during the early stages of fetal development is associated with the increase in disease susceptibility in later life. The fetal developmental plasticity is considered as a protective mechanism against an undesirable prenatal environment. Dioxin is one of the environmental contaminants and is considered a diabetogenic factor. Experimental animal and human epidemiological studies have revealed that dioxin exposure was associated with insulin resistance and altered beta cell function...
May 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29778504/solitary-chemosensory-cells-are-a-primary-epithelial-source-of-interleukin-25-in-chronic-rhinosinusitis-with-nasal-polyps
#8
Michael A Kohanski, Alan D Workman, Neil N Patel, Li-Yin Hung, Julie P Shtraks, Bei Chen, Mariel Blasetti, Laurel Doghramji, David W Kennedy, Nithin D Adappa, James N Palmer, De'Broski R Herbert, Noam A Cohen
BACKGROUND: IL-25 can function as an early signal for the respiratory Type 2 response characteristic of allergic asthma and chronic rhinosinusitis with nasal polyps (CRSwNP). In the mouse gut, tuft cells are the epithelial source of IL-25. However, the source of human airway epithelial IL-25 has remained elusive. OBJECTIVE: In this study, we sought to determine if the solitary chemosensory cell (SCC) is the predominant source of IL-25 in the sinonasal epithelium...
May 17, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29777878/pulmonary-delivery-of-polyplexes-for-combined-pai-1-gene-silencing-and-cxcr4-inhibition-to-treat-lung-fibrosis
#9
B S Ling Ding, B S Chenfei Zhu, M S Fei Yu, M S Pengkai Wu, M S Gang Chen, B S Aftab Ullah, Kaikai Wang, Minjie Sun, Jing Li, David Oupický
This report describes the development of polyplexes based on CXCR4-inhibiting poly(ethylenimine) derivative (PEI-C) for pulmonary delivery of siRNA to silence plasminogen activator inhibitor-1 (siPAI-1) as a new combination treatment of pulmonary fibrosis (PF). Safety and delivery efficacy of the PEI-C/siPAI-1 polyplexes was investigated in vitro in primary lung fibroblasts isolated from mice with bleomycin-induced PF. Biodistribution analysis following intratracheal administration of fluorescently labeled polyplexes showed prolonged retention in the lungs...
May 16, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29776123/efficient-thermal-diode-with-ballistic-spacer
#10
Shunda Chen, Davide Donadio, Giuliano Benenti, Giulio Casati
Thermal rectification is of importance not only for fundamental physics, but also for potential applications in thermal manipulations and thermal management. However, thermal rectification effect usually decays rapidly with system size. Here, we show that a mass-graded system, with two diffusive leads separated by a ballistic spacer, can exhibit large thermal rectification effect, with the rectification factor independent of system size. The underlying mechanism is explained in terms of the effective size-independent thermal gradient and the match or mismatch of the phonon bands...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29775312/limits-of-directed-self-assembly-in-block-copolymers
#11
Karim Raafat Gadelrab, Yi Ding, Ricardo Pablo-Pedro, Hsieh Chen, Kevin W Gotrik, David G Tempel, Caroline A Ross, Alfredo Alexander-Katz
Understanding the conditions under which defects appear in self-assembling soft-matter systems is of great importance, for example, in the development of block-copolymer (BCP) nanolithography. Here, we explore the limits of directed self-assembly of BCPs by deliberately adding random imperfections in the template. Our results show that defects emerge due to local "shear-like" distortions of the polymer-template system, a new mechanism that is fundamentally different from canonical mechanisms of 2D melting...
May 18, 2018: Nano Letters
https://www.readbyqxmd.com/read/29774853/reassortant-clade-2-3-4-4-of-highly-pathogenic-avian-influenza-a-h5n6-virus-taiwan-2017
#12
Li-Hsuan Chen, Dong-Hun Lee, Yu-Pin Liu, Wan-Chen Li, David E Swayne, Jen-Chieh Chang, Yen-Ping Chen, Fan Lee, Wen-Jane Tu, Yu-Ju Lin
A highly pathogenic avian influenza A(H5N6) virus of clade 2.3.4.4 was detected in a domestic duck found dead in Taiwan during February 2017. The endemic situation and continued evolution of various reassortant highly pathogenic avian influenza viruses in Taiwan warrant concern about further reassortment and a fifth wave of intercontinental spread.
June 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29766324/a-general-lc-ms-ms-method-for-monitoring-potential-%C3%AE-lactam-contamination-in-drugs-and-drug-manufacturing-surfaces
#13
Chen Qiu, Hongbin Zhu, Connie Ruzicka, David Keire, Hongping Ye
Penicillins and some non-penicillin β-lactams may cause potentially life-threatening allergic reactions. Thus, possible cross contamination of β-lactams in food or drugs can put people at risk. Therefore, when there is a reasonable possibility that a non-penicillin product could be contaminated by penicillin, the drug products are tested for penicillin contamination. Here, a sensitive and rapid method for simultaneous determination of multiple β-lactam antibiotics using high performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed and validated...
May 15, 2018: AAPS Journal
https://www.readbyqxmd.com/read/29765150/phase-i-studies-of-azd1208-a-proviral-integration-moloney-virus-kinase-inhibitor-in-solid-and-haematological-cancers
#14
Jorge Cortes, Kenji Tamura, Daniel J DeAngelo, Johann de Bono, David Lorente, Mark Minden, Geoffrey L Uy, Hagop Kantarjian, Lisa S Chen, Varsha Gandhi, Robert Godin, Karen Keating, Kristen McEachern, Karthick Vishwanathan, Janet Elizabeth Pease, Emma Dean
BACKGROUND: Proviral integration Moloney virus (PIM) kinases (PIM1, 2 and 3) are overexpressed in several tumour types and contribute to oncogenesis. AZD1208 is a potent ATP-competitive PIM kinase inhibitor investigated in patients with recurrent or refractory acute myeloid leukaemia (AML) or advanced solid tumours. METHODS: Two dose-escalation studies were performed to evaluate the safety and tolerability, and to define the maximum tolerated dose (MTD), of AZD1208 in AML and solid tumours...
May 16, 2018: British Journal of Cancer
https://www.readbyqxmd.com/read/29763693/influence-of-lipopolysaccharide-on-proinflammatory-gene-expression-in-human-corneal-conjunctival-and-meibomian-gland-epithelial-cells
#15
Di Chen, Afsun Sahin, Wendy R Kam, Yang Liu, Raheleh Rahimi Darabad, David A Sullivan
PURPOSE: Lipopolysaccharide (LPS), a bacterial endotoxin, is known to stimulate leuokotriene B4 (LTB4) secretion by human corneal (HCECs), conjunctival (HConjECs) and meibomian gland (HMGECs) epithelial cells. We hypothesize that this LTB4 effect represents an overall induction of proinflammatory gene expression in these cells. Our objective was to test this hypothesis. METHODS: Immortalized HCECs, HConjECs and HMGECs were cultured in the presence or absence of LPS (15 μg/ml) and ligand binding protein (LBP; 150 ng/ml)...
May 12, 2018: Ocular Surface
https://www.readbyqxmd.com/read/29762872/the-effect-of-onabotulinumtoxina-on-aura-frequency-and-severity-in-patients-with-hemiplegic-migraine-case-series-of-11-patients
#16
Tiffany Y Chen, Ivan Garza, David W Dodick, Carrie E Robertson
BACKGROUND: OnabotulinumtoxinA has been demonstrated to be effective for the preventive treatment of headache in individuals with chronic migraine and has been approved and recommended for this patient population. While the therapeutic effect of onabotulinumtoxinA on migraine headache is well documented, there is limited information on the effect of onabotulinumtoxinA on migraine aura. OBJECTIVE: Given the prolonged and often debilitating nature of aura in patients with hemiplegic migraine, our group sought to examine the effect of onabotulinumtoxinA on aura frequency and severity in this specific subset of migraine patients...
May 15, 2018: Headache
https://www.readbyqxmd.com/read/29762717/durable-complete-responses-in-some-recurrent-high-grade-glioma-patients-treated-with-toca-511-toca-fc
#17
Timothy F Cloughesy, Joseph Landolfi, Michael A Vogelbaum, Derek Ostertag, James B Elder, Stephen Bloomfield, Bob Carter, Clark C Chen, Steven N Kalkanis, Santosh Kesari, Albert Lai, Ian Y Lee, Linda M Liau, Tom Mikkelsen, Phioanh Nghiemphu, David Piccioni, William Accomando, Oscar R Diago, Daniel J Hogan, Dawn Gammon, Noriyuki Kasahara, Thian Kheoh, Douglas J Jolly, Harry E Gruber, Asha Das, Tobias Walbert
Background: Vocimagene amiretrorepvec (Toca 511) is an investigational gamma-retroviral replicating vector encoding cytosine deaminase that, when used in combination with extended-release 5-fluorocytosine (Toca FC), results preclinically in local production of 5-fluorouracil, depletion of immune-suppressive myeloid cells, and subsequent induction of anti-tumor immunity. Recurrent high grade glioma (rHGG) patients have a high unmet need for effective therapies that produce durable responses lasting more than 6 months...
May 12, 2018: Neuro-oncology
https://www.readbyqxmd.com/read/29762663/population-genomic-data-reveal-genes-related-to-important-traits-of-quail
#18
Yan Wu, Yaolei Zhang, Zhuocheng Hou, Guangyi Fan, Jinsong Pi, Shuai Sun, Jiang Chen, Huaqiao Liu, Xiao Du, Jie Shen, Gang Hu, Wenbin Chen, Ailuan Pan, Pingping Yin, Xiaoli Chen, Yuejin Pu, He Zhang, Zhenhua Liang, Jianbo Jian, Hao Zhang, Bin Wu, Jing Sun, Jianwei Chen, Hu Tao, Ting Yang, Hongwei Xiao, Huan Yang, Chuanwei Zheng, Mingzhou Bai, Xiaodong Fang, David W Burt, Wen Wang, Qingyi Li, Xun Xu, Chengfeng Li, Huanming Yang, Jian Wang, Ning Yang, Xin Liu, Jinping Du
Background: Japanese quail (Coturnix japonica), a recently domesticated poultry species, is important not only as an agricultural product, but also as a model bird species for genetic research. However, most of the biological questions concerning genomics, phylogenetics and genetics of some important economic traits have not been answered. It is thus necessary to complete a high-quality genome sequence as well as a series of comparative genomics, evolution and functional studies. Results: Here, we present a quail genome assembly spanning 1...
May 11, 2018: GigaScience
https://www.readbyqxmd.com/read/29762141/pd-1-expression-in-chronic-lymphocytic-leukemia-small-lymphocytic-lymphoma-cll-sll-and-large-b-cell-richter-transformation-dlbcl-rt-a-characteristic-feature-of-dlbcl-rt-and-potential-surrogate-marker-for-clonal-relatedness
#19
Rong He, Wei Ding, David S Viswanatha, Dong Chen, Min Shi, Daniel Van Dyke, Shulan Tian, Linda N Dao, Sameer A Parikh, Tait D Shanafelt, Timothy G Call, Stephen M Ansell, Jose F Leis, Ming Mai, Curtis A Hanson, Karen L Rech
Chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) is a low-grade B-cell neoplasm and ∼2% to 9% patients develop an aggressive lymphoma, most commonly diffuse large B-cell lymphoma (Richter transformation, DLBCL-RT). Programmed death-1 (PD-1) pathway plays a crucial role in tumor host immunity evasion and its blockade has emerged as an effective anti-cancer immunotherapy. PD-L1 and PD-1 expression has shown predictive value in anti-PD cancer immunotherapy; however, it has not been well documented in CLL/SLL and DLBCL-RT...
May 14, 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29762091/rapid-automated-quantification-of-cerebral-leukoaraiosis-on-ct-images-a-multicenter-validation-study
#20
Liang Chen, Anoma Lalani Carlton Jones, Grant Mair, Rajiv Patel, Anastasia Gontsarova, Jeban Ganesalingam, Nikhil Math, Angela Dawson, Basaam Aweid, David Cohen, Amrish Mehta, Joanna Wardlaw, Daniel Rueckert, Paul Bentley
Purpose To validate a random forest method for segmenting cerebral white matter lesions (WMLs) on computed tomographic (CT) images in a multicenter cohort of patients with acute ischemic stroke, by comparison with fluid-attenuated recovery (FLAIR) magnetic resonance (MR) images and expert consensus. Materials and Methods A retrospective sample of 1082 acute ischemic stroke cases was obtained that was composed of unselected patients who were treated with thrombolysis or who were undergoing contemporaneous MR imaging and CT, and a subset of International Stroke Thrombolysis-3 trial participants...
May 15, 2018: Radiology
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