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David Chen

Juli E Jones, Samuel M Cadena, Chenguang Gong, Xiaomei Wang, Zhiping Chen, Sharon X Wang, Chad Vickers, Hong Chen, Estelle Lach-Trifilieff, John R Hadcock, David J Glass
No abstract text is available yet for this article.
March 20, 2018: Cell Reports
Robert J Motzer, Nizar M Tannir, David F McDermott, Osvaldo Arén Frontera, Bohuslav Melichar, Toni K Choueiri, Elizabeth R Plimack, Philippe Barthélémy, Camillo Porta, Saby George, Thomas Powles, Frede Donskov, Victoria Neiman, Christian K Kollmannsberger, Pamela Salman, Howard Gurney, Robert Hawkins, Alain Ravaud, Marc-Oliver Grimm, Sergio Bracarda, Carlos H Barrios, Yoshihiko Tomita, Daniel Castellano, Brian I Rini, Allen C Chen, Sabeen Mekan, M Brent McHenry, Megan Wind-Rotolo, Justin Doan, Padmanee Sharma, Hans J Hammers, Bernard Escudier
Background Nivolumab plus ipilimumab produced objective responses in patients with advanced renal-cell carcinoma in a pilot study. This phase 3 trial compared nivolumab plus ipilimumab with sunitinib for previously untreated clear-cell advanced renal-cell carcinoma. Methods We randomly assigned adults in a 1:1 ratio to receive either nivolumab (3 mg per kilogram of body weight) plus ipilimumab (1 mg per kilogram) intravenously every 3 weeks for four doses, followed by nivolumab (3 mg per kilogram) every 2 weeks, or sunitinib (50 mg) orally once daily for 4 weeks (6-week cycle)...
March 21, 2018: New England Journal of Medicine
Shivaji Thadke, J Dinithi R Perera, V M Hridya, Kirti Bhatt, Ashif Yasin Shaikh, Wei-Che Hsieh, Mengshen David Chen, Chakicherla Gayathri, Roberto R Gil, Gordon S Rule, Arnab Mukherjee, Charles A Thornton, Danith H Ly
We report the development of a new class of nucleic acid ligands that is comprised of Janus bases and MPPNA backbone and is capable of binding rCAG-repeats in a sequence-specific and selective manner via, inference, bivalent H-bonding interactions. Individually, the interactions between ligands and RNA are weak and transient. However, upon the installation of C-terminal thioester and N-terminal cystine and the reduction of disulfide bond, they undergo template-directed native chemical ligation to form concatenated oligomeric products that bind tightly to the RNA template...
March 21, 2018: Biochemistry
Chen Ben David, Nicola L Bragazzi, Abdulla Watad, Kassem Sharif, Aaron Whitby, Howard Amital, Mohammad Adawi
RATIONALE: Hidradenitis suppurativa (HS) is a chronic inflammatory condition characterized by recurrent swollen, deep, and painful abscesses. Several autoimmune conditions have been shown to be associated with HS including inflammatory bowel disease and spondyloarthropathies. PATIENT CONCERNS: 40-year-old female with systemic lupus erythematous (SLE) presented with recurrent abscesses and nodules on her extremities. DIAGNOSIS: Early considerations related the described dermatologic findings to the dermatologic manifestations of SLE, however findings from lesion biopsy were suggestive of HS...
March 2018: Medicine (Baltimore)
Yi Dong, Kun Fang, Xin Wang, Shengdi Chen, Xueyuan Liu, Yuwu Zhao, Yangtai Guan, Dingfang Cai, Gang Li, Jianmin Liu, Jianren Liu, Jianhua Zhuang, Panshi Wang, Xin Chen, Haipeng Shen, David Z Wang, Ying Xian, Wuwei Feng, Bruce Cv Campbell, Mark Parsons, Qiang Dong
Background Several stroke outcome and quality control projects have demonstrated the success in stroke care quality improvement through structured process. However, Chinese health-care systems are challenged with its overwhelming numbers of patients, limited resources, and large regional disparities. Aim To improve quality of stroke care to address regional disparities through process improvement. Method and design The Shanghai Stroke Service System (4S) is established as a regional network for stroke care quality improvement in the Shanghai metropolitan area...
January 1, 2018: International Journal of Stroke: Official Journal of the International Stroke Society
Daniel O'Nolan, David G Madden, Amrit Kumar, Kai-Jie Chen, Tony Pham, Katherine A Forrest, Ewa Patyk-Kazmierczak, Qing-Yuan Yang, Claire A Murray, Chiu C Tang, Brian Space, Michael J Zaworotko
Phases of a 2-fold pcu hybrid ultramicroporous material (HUM), SIFSIX-14-Cu-i, exhibiting 99%, 93%, 89%, and 70% partial interpenetration have been obtained. 1 : 99 C2H2/C2H4 gas separation studies reveal that as the proportion of interpenetrated component decreases, so does the separation performance.
March 21, 2018: Chemical Communications: Chem Comm
Lianghua Fang, Hui Chen, Zhenya Tang, Neda Kalhor, Ching-Hua Liu, Hui Yao, Shimin Hu, Pei Lin, Jin Zhao, Raja Luthra, Rajesh R Singh, Mark J Routbort, David Hong, L Jeffrey Medeiros, Xinyan Lu
To investigate the prognostic impact of MET copy number ( MET -CN) in patients with non-small cell lung cancer (NSCLC), we retrospectively reviewed clinical and pathologic data of NSCLC patients whose tumors were assessed for MET -CN using fluorescence in situ hybridization (FISH). We correlated MET -CN status with patient overall survival (OS) and optimized MET -FISH reporting criteria. The study group included 384 patients with NSCLC of which 88% were adenocarcinoma and 55.7% of patients had distant metastases...
February 27, 2018: Oncotarget
Joshua P Bobko, Mrinal Sinha, David Chen, Stephen Patterson, Todd Baldridge, Michael Eby, William Harris, Ryan Starling, Ofer Lichtman
No abstract text is available yet for this article.
March 2018: Western Journal of Emergency Medicine
Zehuai Wen, Jia Wei, Huiling Xue, Yunqin Chen, David Melnick, Jesus Gonzalez, Judith Hackett, Xiaoyan Li, Zhaolong Cao
Background: The etiology, epidemiology, treatment patterns, and clinical outcomes of neonatal and pediatric pneumonia patients in China are not well reported. This retrospective chart review study aimed to describe such information among neonatal (0 to 27 days) and pediatric (28 days to <18 years) pneumonia patients in two regions of China. Methods: Electronic medical records of pneumonia hospitalizations (aged <18 years) admitted between 2008 and 2013 from four hospitals under Guangdong Provincial Hospital of Chinese Medicine (Southern China) and between 2010 and 2014 at Peking University People's Hospital (Beijing, Northern China) were reviewed...
2018: Therapeutics and Clinical Risk Management
Xiaomu Wei, M Nieves Calvo-Vidal, Siwei Chen, Gang Wu, Maria V Revuelta, Jian Sun, Jinghui Zhang, Michael F Walsh, Kim E Nichols, Vijai Joseph, Carrie Snyder, Celine M Vachon, James D McKay, Shu-Ping Wang, David S Jayabalan, Lauren M Jacobs, Dina Becirovic, Rosalie G Waller, Mykyta Artomov, Agnes Viale, Jayeshkumar Patel, Jude M Phillip, Selina Chen-Kiang, Karen Curtin, Mohamed Salama, Djordje Atanackovic, Ruben Niesvizky, Ola Landgren, Susan L Slager, Lucy A Godley, Jane Churpek, Judy E Garber, Kenneth C Anderson, Mark J Daly, Robert G Roeder, Charles Dumontet, Henry T Lynch, Charles G Mullighan, Nicola J Camp, Kenneth Offit, Robert J Klein, Haiyuan Yu, Leandro Cerchietti, Steven M Lipkin
Given the frequent and largely incurable occurrence of multiple myeloma (MM), identification of germline genetic mutations that predispose cells to MM may provide insight into disease etiology and the developmental mechanisms of its cell of origin, the plasma cell. Here we identified familial and early-onset MM kindreds with truncating mutations in lysine-specific demethylase 1 (LSD1/KDM1A), an epigenetic transcriptional repressor that primarily demethylates histone H3 on lysine 4 and regulates hematopoietic stem cell self-renewal...
March 20, 2018: Cancer Research
Alejandra M Wiedeman, Kyly C Whitfield, Kaitlin M March, Nancy N Chen, Hou Kroeun, Ly Sokhoing, Prak Sophonneary, Roger A Dyer, Zhaoming Xu, David D Kitts, Timothy J Green, Sheila M Innis, Susan I Barr
Choline has critical roles during periods of rapid growth and development, such as infancy. In human milk, choline is mostly present in water-soluble forms (free choline, phosphocholine, and glycerophosphocholine). It is thought that milk choline concentration is influenced by maternal choline intake, and the richest food sources for choline are of animal origin. Scarce information exists on milk choline from countries differing in animal-source food availability. In this secondary analysis of samples from previous trials, the concentrations of the water-soluble forms of choline were quantified by liquid chromatography-tandem mass spectrometry in mature milk samples collected from lactating women in Canada ( n = 301) and in Cambodia ( n = 67)...
March 20, 2018: Nutrients
David Dreizin, Uttam Bodanapally, Alexis Boscak, Nikki Tirada, Ghada Issa, Jason W Nascone, Louis Bivona, Daniel Mascarenhas, Robert V O'Toole, Erika Nixon, Rong Chen, Eliot Siegel
Purpose To develop and test a computed tomography (CT)-based predictive model for major arterial injury after blunt pelvic ring disruptions that incorporates semiautomated pelvic hematoma volume quantification. Materials and Methods A multivariable logistic regression model was developed in patients with blunt pelvic ring disruptions who underwent arterial phase abdominopelvic CT before angiography from 2008 to 2013. Arterial injury at angiography requiring transarterial embolization (TAE) served as the outcome...
March 20, 2018: Radiology
Ming Li Wang, Charles Y Chen, Brandon Tonnis, David Pinnow, Jerry Davis, Y Q An, Phat Dang
The level of oleic acid in peanut seed is one of the most important factors in determining seed quality and is controlled by two pairs of homeologous genes (FAD2A and FAD2B). The genotypes of eight F8 breeding lines were determined as AABB, aaBB, AAbb, and aabb by real-time PCR and sequencing. Fresh seeds were collected from five seed developmental stages and, after drying, were used for chemical analysis. Our results showed (1) as seeds developed, seed weight, oil content, and oleic acid level significantly increased, whereas four other fatty acid levels decreased, but protein content and another four fatty acid levels did not significantly change...
March 20, 2018: Journal of Agricultural and Food Chemistry
Simeon U Springer, Chung-Hsin Chen, Maria Del Carmen Rodriguez Pena, Lu Li, Christopher Douville, Yuxuan Wang, Joshua David Cohen, Diana Taheri, Natalie Silliman, Joy Schaefer, Janine Ptak, Lisa Dobbyn, Maria Papoli, Isaac Kinde, Bahman Afsari, Aline C Tregnago, Stephania M Bezerra, Christopher VandenBussche, Kazutoshi Fujita, Dilek Ertoy, Isabela W Cunha, Lijia Yu, Trinity J Bivalacqua, Arthur P Grollman, Luis A Diaz, Rachel Karchin, Ludmila Danilova, Chao-Yuan Huang, Chia-Tung Shun, Robert J Turesky, Byeong Hwa Yun, Thomas A Rosenquist, Yeong-Shiau Pu, Ralph H Hruban, Cristian Tomasetti, Nickolas Papadopoulos, Ken W Kinzler, Bert Vogelstein, Kathleen G Dickman, George J Netto
Current non-invasive approaches for detection of urothelial cancers are suboptimal. We developed a test to detect urothelial neoplasms using DNA recovered from cells shed into urine. UroSEEK incorporates massive parallel sequencing assays for mutations in 11 genes and copy number changes on 39 chromosome arms. In 570 patients at risk for bladder cancer (BC), UroSEEK was positive in 83% of those who developed BC. Combined with cytology, UroSEEK detected 95% of patients who developed BC. Of 56 patients with upper tract urothelial cancer, 75% tested positive by UroSEEK, including 79% of those with non-invasive tumors...
March 20, 2018: ELife
Fatemeh Mahmoodani, Conrad O Perera, Grant Abernethy, Bruno Fedrizzi, David Greenwood, Hong Chen
In a successful fortification program, the stability of micronutrients added to the food is one of the most important factors. The added vitamin D3 is known to sometimes decline during storage of fortified milks, and oxidation through fatty acid lipoxidation could be suspected as the likely cause. Identification of vitamin D3 oxidation products (VDOPs) in natural foods is a challenge due to the low amount of their contents and their possible transformation to other compounds during analysis. The main objective of this study was to find a method to extract VDOPs in simulated whole milk powder and to identify these products using LTQ-ion trap, Q-Exactive Orbitrap and triple quadrupole mass spectrometry...
March 19, 2018: Journal of the American Society for Mass Spectrometry
Marcello Panagia, Howard H Chen, Dominique Croteau, Yin-Ching Iris Chen, Chongzhao Ran, Ivan Luptak, Lee Josephson, Wilson S Colucci, David E Sosnovik
BACKGROUND: Substrate utilization in tissues with high energetic requirements could play an important role in cardiometabolic disease. Current techniques to assess energetics are limited by high cost, low throughput, and the inability to resolve multiple readouts simultaneously. Consequently, we aimed to develop a multiplexed optical imaging platform to simultaneously assess energetics in multiple organs in a high throughput fashion. METHODS AND RESULTS: The detection of 18F-Fluordeoxyglucose uptake via Cerenkov luminescence and free fatty acid uptake with a fluorescent C16 free fatty acid was tested...
March 2018: Circulation. Cardiovascular Imaging
Bradley A Perkins, C Thomas Caskey, Pamila Brar, Eric Dec, David S Karow, Andrew M Kahn, Ying-Chen Claire Hou, Naisha Shah, Debbie Boeldt, Erin Coughlin, Gabby Hands, Victor Lavrenko, James Yu, Andrea Procko, Julia Appis, Anders M Dale, Lining Guo, Thomas J Jönsson, Bryan M Wittmann, Istvan Bartha, Smriti Ramakrishnan, Axel Bernal, James B Brewer, Suzanne Brewerton, William H Biggs, Yaron Turpaz, J Craig Venter
Reducing premature mortality associated with age-related chronic diseases, such as cancer and cardiovascular disease, is an urgent priority. We report early results using genomics in combination with advanced imaging and other clinical testing to proactively screen for age-related chronic disease risk among adults. We enrolled active, symptom-free adults in a study of screening for age-related chronic diseases associated with premature mortality. In addition to personal and family medical history and other clinical testing, we obtained whole-genome sequencing (WGS), noncontrast whole-body MRI, dual-energy X-ray absorptiometry (DXA), global metabolomics, a new blood test for prediabetes (Quantose IR), echocardiography (ECHO), ECG, and cardiac rhythm monitoring to identify age-related chronic disease risks...
March 19, 2018: Proceedings of the National Academy of Sciences of the United States of America
Chao Nie, Huimin Wang, Rui Wang, David Ginsburg, Xiao-Wei Chen
The flow of cargo vesicles along the secretory pathway requires concerted action among various regulators. The COPII complex, assembled by the activated SAR1 GTPases on the surface of the endoplasmic reticulum, orchestrates protein interactions to package cargos and generate transport vesicles en route to the Golgi. The dynamic nature of COPII, however, hinders analysis with conventional biochemical assays. Here we apply proximity-dependent biotinylation labeling to capture the dynamics of COPII transport in cells...
March 19, 2018: Proceedings of the National Academy of Sciences of the United States of America
Huiying Ma, Keke Zhang, Qing Jiang, Diya Dai, Hongli Li, Wentao Bi, David Da Yong Chen
Plant polysaccharides have numerous medicinal functions. Due to the differences in their origins, regions of production, and cultivation conditions, the quality and the functions of polysaccharides can vary significantly. They are macromolecules with large molecular weight (MW) and complex structure, and pose great challenge for the analytical technology used. Taking Dendrobium officinale (DO) from various origins and locations as model samples. In this investigation, mechanochemical extraction method was used to successfully extract polysaccharides from DO using water as solvent, the process is simple, fast (40 s) and with high yield...
March 13, 2018: Journal of Chromatography. A
Wei Zhang, Lei Zhang, Ying Li, Yuling Tian, Xiaoran Li, Xue Zhang, Arthur P J Mol, David A Sonnenfeld, Jianguo Liu, Zeyu Ping, Long Chen
"Supply-side structural reform" (SSSR) has been the most important ongoing economic reform in China since 2015, but its important environmental health effects have not been properly assessed. The present study addresses that gap by focusing on reduction of overcapacity in the coal, steel, and iron sectors, combined with reduction of emissions of sulfur dioxide (SO2 ), nitrogen oxide (NOx ), and fine particulate matter (PM2.5 ), and projecting resultant effects on air quality and public health across cities and regions in China...
March 15, 2018: Environment International
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