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Alexander Lee

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https://www.readbyqxmd.com/read/29666432/genetic-validation-of-bipolar-disorder-identified-by-automated-phenotyping-using-electronic-health-records
#1
Chia-Yen Chen, Phil H Lee, Victor M Castro, Jessica Minnier, Alexander W Charney, Eli A Stahl, Douglas M Ruderfer, Shawn N Murphy, Vivian Gainer, Tianxi Cai, Ian Jones, Carlos N Pato, Michele T Pato, Mikael Landén, Pamela Sklar, Roy H Perlis, Jordan W Smoller
Bipolar disorder (BD) is a heritable mood disorder characterized by episodes of mania and depression. Although genomewide association studies (GWAS) have successfully identified genetic loci contributing to BD risk, sample size has become a rate-limiting obstacle to genetic discovery. Electronic health records (EHRs) represent a vast but relatively untapped resource for high-throughput phenotyping. As part of the International Cohort Collection for Bipolar Disorder (ICCBD), we previously validated automated EHR-based phenotyping algorithms for BD against in-person diagnostic interviews (Castro et al...
April 18, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29662686/patterns-of-physical-activity-in-sedentary-older-individuals-with-type-2-diabetes
#2
Pearl G Lee, Jinkyung Ha, Caroline S Blaum, Kimberlee Gretebeck, Neil B Alexander
Background: The Community Healthy Activities Model Program for Seniors (CHAMPS) survey, summarized into weekly caloric expenditures, is a common physical activity (PA) assessment tool among older adults. Specific types of PA reported in the CHAMPS have not been systematically analyzed. We applied latent class analysis to identify the patterns of PA among sedentary older adults with diabetes reported in the CHAMPS survey. Methods: Latent class models of PA were identified using the CHAMPS survey data reported by 115 individuals aged ≥60 years with type 2 diabetes whom volunteered for a clinical study of PA...
2018: Clinical Diabetes and Endocrinology
https://www.readbyqxmd.com/read/29660514/early-life-predictors-of-brain-development-at-term-equivalent-age-in-infants-born-across-the-gestational-age-spectrum
#3
REVIEW
Deanne K Thompson, Claire E Kelly, Jian Chen, Richard Beare, Bonnie Alexander, Marc L Seal, Katherine Lee, Lillian G Matthews, Peter J Anderson, Lex W Doyle, Alicia J Spittle, Jeanie L Y Cheong
BACKGROUND: It is well established that preterm infants have altered brain development compared with full-term (FT; ≥37 weeks' gestational age [GA]) infants, however the perinatal factors associated with brain development in preterm infants have not been fully elucidated. In particular, perinatal predictors of brain development may differ between very preterm infants (VP; <32 weeks' GA) and infants born moderate (MP; 32-33 weeks' GA) and late (LP; 34-36 weeks' GA) preterm, but this has not been studied...
April 13, 2018: NeuroImage
https://www.readbyqxmd.com/read/29656892/cancer-germline-antigen-expression-discriminates-clinical-outcome-to-ctla-4-blockade
#4
Sachet A Shukla, Pavan Bachireddy, Bastian Schilling, Christina Galonska, Qian Zhan, Clyde Bango, Rupert Langer, Patrick C Lee, Daniel Gusenleitner, Derin B Keskin, Mehrtash Babadi, Arman Mohammad, Andreas Gnirke, Kendell Clement, Zachary J Cartun, Eliezer M Van Allen, Diana Miao, Ying Huang, Alexandra Snyder, Taha Merghoub, Jedd D Wolchok, Levi A Garraway, Alexander Meissner, Jeffrey S Weber, Nir Hacohen, Donna Neuberg, Patrick R Potts, George F Murphy, Christine G Lian, Dirk Schadendorf, F Stephen Hodi, Catherine J Wu
CTLA-4 immune checkpoint blockade is clinically effective in a subset of patients with metastatic melanoma. We identify a subcluster of MAGE-A cancer-germline antigens, located within a narrow 75 kb region of chromosome Xq28, that predicts resistance uniquely to blockade of CTLA-4, but not PD-1. We validate this gene expression signature in an independent anti-CTLA-4-treated cohort and show its specificity to the CTLA-4 pathway with two independent anti-PD-1-treated cohorts. Autophagy, a process critical for optimal anti-cancer immunity, has previously been shown to be suppressed by the MAGE-TRIM28 ubiquitin ligase in vitro...
April 6, 2018: Cell
https://www.readbyqxmd.com/read/29649280/evolution-of-structural-diversity-of-trichothecenes-a-family-of-toxins-produced-by-plant-pathogenic-and-entomopathogenic-fungi
#5
Robert H Proctor, Susan P McCormick, Hye-Seon Kim, Rosa E Cardoza, April M Stanley, Laura Lindo, Amy Kelly, Daren W Brown, Theresa Lee, Martha M Vaughan, Nancy J Alexander, Mark Busman, Santiago Gutiérrez
Trichothecenes are a family of terpenoid toxins produced by multiple genera of fungi, including plant and insect pathogens. Some trichothecenes produced by the fungus Fusarium are among the mycotoxins of greatest concern to food and feed safety because of their toxicity and frequent occurrence in cereal crops, and trichothecene production contributes to pathogenesis of some Fusarium species on plants. Collectively, fungi produce over 150 trichothecene analogs: i.e., molecules that share the same core structure but differ in patterns of substituents attached to the core structure...
April 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29643768/mirna-431-prevents-amyloid-%C3%AE-induced-synapse-loss-in-neuronal-cell-culture-model-of-alzheimer-s-disease-by-silencing-kremen1
#6
Sean P Ross, Kelly E Baker, Amanda Fisher, Lee Hoff, Elena S Pak, Alexander K Murashov
Synapse loss is well regarded as the underlying cause for the progressive decline of memory function over the course of Alzheimer's disease (AD) development. Recent observations suggest that the accumulation of the Wnt antagonist Dickkopf-1 (Dkk1) in the AD brain plays a critical role in triggering synaptic degeneration. Mechanistically, Dkk1 cooperates with Kremen1 (Krm1), its transmembrane receptor, to block the Wnt/β-catenin signaling pathway. Here, we show that silencing Krm1 with miR-431 prevents amyloid-β-mediated synapse loss in cortico-hippocampal cultures isolated from triple transgenic 3xTg-AD mice...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29626205/origin-of-vertical-orientation-in-two-dimensional-metal-halide-perovskites-and-its-effect-on-photovoltaic-performance
#7
Alexander Z Chen, Michelle Shiu, Jennifer H Ma, Matthew R Alpert, Depei Zhang, Benjamin J Foley, Detlef-M Smilgies, Seung-Hun Lee, Joshua J Choi
Thin films based on two-dimensional metal halide perovskites have achieved exceptional performance and stability in numerous optoelectronic device applications. Simple solution processing of the 2D perovskite provides opportunities for manufacturing devices at drastically lower cost compared to current commercial technologies. A key to high device performance is to align the 2D perovskite layers, during the solution processing, vertical to the electrodes to achieve efficient charge transport. However, it is yet to be understood how the counter-intuitive vertical orientations of 2D perovskite layers on substrates can be obtained...
April 6, 2018: Nature Communications
https://www.readbyqxmd.com/read/29625055/an-integrated-tcga-pan-cancer-clinical-data-resource-to-drive-high-quality-survival-outcome-analytics
#8
Jianfang Liu, Tara Lichtenberg, Katherine A Hoadley, Laila M Poisson, Alexander J Lazar, Andrew D Cherniack, Albert J Kovatich, Christopher C Benz, Douglas A Levine, Adrian V Lee, Larsson Omberg, Denise M Wolf, Craig D Shriver, Vesteinn Thorsson, Hai Hu
For a decade, The Cancer Genome Atlas (TCGA) program collected clinicopathologic annotation data along with multi-platform molecular profiles of more than 11,000 human tumors across 33 different cancer types. TCGA clinical data contain key features representing the democratized nature of the data collection process. To ensure proper use of this large clinical dataset associated with genomic features, we developed a standardized dataset named the TCGA Pan-Cancer Clinical Data Resource (TCGA-CDR), which includes four major clinical outcome endpoints...
April 5, 2018: Cell
https://www.readbyqxmd.com/read/29608304/cations-modulate-actin-bundle-mechanics-assembly-dynamics-and-structure
#9
Nicholas Castaneda, Tianyu Zheng, Hector J Rivera-Jacquez, Hyun-Ju Lee, Jaekyung Hyun, Alexander Balaeff, Qun Huo, Hyeran Kang
Actin bundles are key factors in the mechanical support and dynamic reorganization of the cytoskeleton. High concentrations of multivalent counterions promote bundle formation through electrostatic attraction between actin filaments that are negatively charged polyelectrolytes. In this study, we evaluate how physiologically relevant divalent cations affect the mechanical, dynamic, and structural properties of actin bundles. Using a combination of total internal reflection fluorescence microscopy, transmission electron microscopy, and dynamic light scattering, we demonstrate that divalent cations modulate bundle stiffness, length distribution, and lateral growth...
April 2, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29601787/prevalence-of-the-apolipoprotein-e-%C3%AE%C2%B54-allele-in-amyloid-%C3%AE-positive-subjects-across-the-spectrum-of-alzheimer-s-disease
#10
Niklas Mattsson, Colin Groot, Willemijn J Jansen, Susan Landau, Victor Villemagne, Sebastiaan Engelborghs, Mark Mintun, Alberto Lleo, José Luis Molinuevo, William Jagust, Giovanni B Frisoni, Adrian Ivanoiu, Gaël Chételat, Catarina Resende de Oliveira, Karen M Rodrigue, Johannes Kornhuber, Anders Wallin, Aleksandra Klimkowicz-Mrowiec, Ramesh Kandimella, Julius Popp, Pauline P Aalten, Dag Aarsland, Daniel Alcolea, Ina S Almdahl, Inês Baldeiras, Mark A van Buchem, Enrica Cavedo, Kewei Chen, Ann D Cohen, Stefan Förster, Juan Fortea, Kristian S Frederiksen, Yvonne Freund-Levi, Kiran Dip Gill, Olymbia Gkatzima, Timo Grimmer, Harald Hampel, Sanna-Kaisa Herukka, Peter Johannsen, Koen van Laere, Mony de Leon, Wolfgang Maier, Jan Marcusson, Olga Meulenbroek, Hanne M Møllergård, John C Morris, Barbara Mroczko, Arto Nordlund, Sudesh Prabhakar, Oliver Peters, Lorena Rami, Eloy Rodríguez-Rodríguez, Catherine M Roe, Eckart Rüther, Isabel Santana, Johannes Schröder, Sang W Seo, Hilkka Soininen, Luiza Spiru, Erik Stomrud, Hanne Struyfs, Charlotte E Teunissen, Frans R J Verhey, Stephanie J B Vos, Linda J C van Waalwijk van Doorn, Gunhild Waldemar, Åsa K Wallin, Jens Wiltfang, Rik Vandenberghe, David J Brooks, Tormod Fladby, Christopher C Rowe, Alexander Drzezga, Marcel M Verbeek, Marie Sarazin, David A Wolk, Adam S Fleisher, William E Klunk, Duk L Na, Pascual Sánchez-Juan, Dong Young Lee, Agneta Nordberg, Magda Tsolaki, Vincent Camus, Juha O Rinne, Anne M Fagan, Henrik Zetterberg, Kaj Blennow, Gil D Rabinovici, Oskar Hansson, Bart N M van Berckel, Wiesje M van der Flier, Philip Scheltens, Pieter Jelle Visser, Rik Ossenkoppele
INTRODUCTION: Apolipoprotein E (APOE) ε4 is the major genetic risk factor for Alzheimer's disease (AD), but its prevalence is unclear because earlier studies did not require biomarker evidence of amyloid β (Aβ) pathology. METHODS: We included 3451 Aβ+ subjects (853 AD-type dementia, 1810 mild cognitive impairment, and 788 cognitively normal). Generalized estimating equation models were used to assess APOE ε4 prevalence in relation to age, sex, education, and geographical location...
March 27, 2018: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/29599443/genome-wide-identification-of-natural-rna-aptamers-in-prokaryotes-and-eukaryotes
#11
Sidika Tapsin, Miao Sun, Yang Shen, Huibin Zhang, Xin Ni Lim, Teodorus Theo Susanto, Siwy Ling Yang, Gui Sheng Zeng, Jasmine Lee, Alexander Lezhava, Ee Lui Ang, Lian Hui Zhang, Yue Wang, Huimin Zhao, Niranjan Nagarajan, Yue Wan
RNAs are well-suited to act as cellular sensors that detect and respond to metabolite changes in the environment, due to their ability to fold into complex structures. Here, we introduce a genome-wide strategy called PARCEL that experimentally identifies RNA aptamers in vitro, in a high-throughput manner. By applying PARCEL to a collection of prokaryotic and eukaryotic organisms, we have revealed 58 new RNA aptamers to three key metabolites, greatly expanding the list of natural RNA aptamers. The newly identified RNA aptamers exhibit significant sequence conservation, are highly structured and show an unexpected prevalence in coding regions...
March 29, 2018: Nature Communications
https://www.readbyqxmd.com/read/29593640/vestibular-dysfunction-in-wernicke-s-encephalopathy-predominant-impairment-of-the-horizontal-semicircular-canals
#12
Seung-Han Lee, Sang-Hoon Kim, Ji-Min Kim, Alexander Andrea Tarnutzer
Background: Wernicke's encephalopathy (WE), a metabolic disorder due to thiamine deficiency, manifests with various neurological symptoms and signs. It has been known as a cause of vestibular dysfunction. Preliminary reports have proposed predominant involvement of the horizontal semicircular canals (HSCs). Objective: To better characterize the pattern of vestibular impairment in patients with WE using quantitative video head-impulse testing and to review the literature regarding this topic...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29580932/postradiation-hypothyroidism-in-head-and-neck-cancers-a-department-of-veterans-affairs-single-institution-case-control-dosimetry-study
#13
Alexander J Lin, Juying Zhang, Jennie Cho-Lim, Warren Inouye, Steve P Lee
We performed a case-control study to characterize the dose-volume relationship and other variables leading to hypothyroidism after head and neck (H&N) cancer radiation therapy (RT) in a homogenous Veterans Affairs (VA) population. All records of patients receiving RT for various H&N cancers at a single VA medical center between 2007 and 2013 (n = 143) were screened for post-RT thyroid stimulating hormone (TSH) levels (n = 77). The thyroid gland was contoured on each slice of the planning computed tomography scan when available (hypothyroid: n = 18; euthyroid > 2 years: n = 16), and dose-volume histograms based on physical dose and biologically equivalent dose (BED) were compared systematically to find the significant dose-volume thresholds that distinguish the patients who developed clinical hypothyroidism...
March 23, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29566273/appropriate-use-criteria-in-dermatopathology-initial-recommendations-from-the-american-society-of-dermatopathology
#14
Claudia I Vidal, Eric A Armbrect, Aleodor A Andea, Angela K Bohlke, Nneka I Comfere, Sarah R Hughes, Jinah Kim, Jessica A Kozel, Jason B Lee, Konstantinos Linos, Brandon R Litzner, Tricia A Missall, Roberto A Novoa, Uma Sundram, Brian L Swick, M Yadira Hurley, Murad Alam, Zsolt Argenyi, Lyn M Duncan, Dirk M Elston, Patrick O Emanuel, Tammie Ferringer, Maxwell A Fung, Gregory A Hosler, Alexander J Lazar, Lori Lowe, Jose A Plaza, Victor G Prieto, June K Robinson, Andras Schaffer, Antonio Subtil, Wei-Lien Wang
BACKGROUND: Appropriate use criteria (AUC) provide physicians guidance in test selection, can affect health care delivery, reimbursement policy, and physician decision-making. OBJECTIVES: The American Society of Dermatopathology (ASDP), with input from the American Academy of Dermatology (AAD) and the College of American Pathologists (CAP), sought to develop AUC in dermatopathology. METHODS: The RAND/UCLA appropriateness methodology, which combines evidence-based medicine, clinical experience and expert judgment, was used to develop AUC in dermatopathology...
March 22, 2018: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/29558496/variation-in-lung-function-and-alterations-in-cardiac-structure-and-function-analysis-of-the-uk-biobank-cardiovascular-magnetic-resonance-imaging-substudy
#15
Ross J Thomson, Nay Aung, Mihir M Sanghvi, Jose Miguel Paiva, Aaron M Lee, Filip Zemrak, Kenneth Fung, Paul E Pfeffer, Alexander J Mackay, Tricia M McKeever, Elena Lukaschuk, Valentina Carapella, Young Jin Kim, Charlotte E Bolton, Stefan K Piechnik, Stefan Neubauer, Steffen E Petersen
BACKGROUND: Reduced lung function is common and associated with increased cardiovascular morbidity and mortality, even in asymptomatic individuals without diagnosed respiratory disease. Previous studies have identified relationships between lung function and cardiovascular structure in individuals with pulmonary disease, but the relationships in those free from diagnosed cardiorespiratory disease have not been fully explored. METHODS: UK Biobank is a prospective cohort study of community participants in the United Kingdom...
2018: PloS One
https://www.readbyqxmd.com/read/29557636/dirac-point-shift-by-carrier-injection-barrier-in-graphene-field-effect-transistor-operation-at-room-temperature
#16
Sungsik Lee, Arokia Nathan, Jack Alexander-Webber, Philipp Braeuninger-Weimer, Abhay A Sagade, Haichang Lu, David Hasko, John Robertson, Stephan Hofmann
A positive shift in the Dirac point in graphene field-effect transistors was observed with Hall-effect measurements coupled with Kelvin-probe measurements at room temperature. This shift can be explained by the asymmetrical behavior of the contact resistance by virtue of the electron injection barrier at the source contact. As an outcome, an intrinsic resistance is given to allow a retrieval of an intrinsic carrier mobility found to be decreased with increasing gate bias, suggesting the dominance of short-range scattering in a single-layer graphene field-effect transistor...
March 21, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29552989/at-the-crossroads-between-neurodegeneration-and-cancer-a-review-of-overlapping-biology-and-its-implications
#17
Alexander Lee Houck, Sahba Seddighi, Jane Ann Driver
BACKGROUND: A growing body of epidemiologic evidence suggests that neurodegenerative diseases occur less frequently in cancer survivors, and vice versa. While unusual, this inverse comorbidity is biologically plausible and could be explained, in part, by the evolutionary tradeoffs made by neurons and cycling cells to optimize performance of their very different functions. The two cell types utilize the same proteins and pathways in different, and sometimes opposite, ways. However, cancer and neurodegeneration also share many pathophysiological features...
February 23, 2018: Current Aging Science
https://www.readbyqxmd.com/read/29552574/do-age-and-weightbearing-radiographs-affect-lateral-joint-space-and-fibular-height-measurements-in-patients-with-discoid-lateral-meniscus
#18
Matthew D Milewski, Ryan Krochak, Andrew J Duarte, Joseph W Marchese, Regina O Kostyun, J Lee Pace, Alexander M Broom, Matthew J Solomito
Background: Several radiographic parameters have been associated with a discoid lateral meniscus. However, limited information is available regarding the radiographic findings of a discoid meniscus in the pediatric population. Purpose: To determine the effect of age and weightbearing (WB) on radiographic parameters associated with discoid lateral menisci in pediatric patients. Study Design: Cohort study (diagnosis); Level of evidence, 3. Methods: Radiographs of pediatric patients with arthroscopically confirmed lateral discoid menisci were compared with age-, side-, and sex-matched individuals with confirmed normal menisci...
March 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29552282/identification-and-preclinical-evaluation-of-the-small-molecule-nsc745887-for-treating-glioblastomas-via-suppressing-dcr3-associated-signaling-pathways
#19
Li-Yun Fann, Ying Chen, Da-Chen Chu, Shao-Ju Weng, Heng-Cheng Chu, Alexander T H Wu, Jiann-Fong Lee, Ahmed Atef Ahmed Ali, Tsung-Chih Chen, Hsu-Shan Huang, Kuo-Hsing Ma
The small-molecule naphtha [2,3-f]quinoxaline-7,12-dione (NSC745887) can effectively inhibit the proliferation of various cancers by trapping DNA-topoisomerase cleavage. The aim of this study was to elucidate cellular responses of NSC745887 in human glioblastoma multiforme (GBM, U118MG and U87MG cells) and investigate the underlying molecular mechanisms. NSC745887 reduced the cell survival rate and increased the sub-G1 population in dose- and time-dependent manners in GBM cells. Moreover, NSC745887 increased expression of γH2AX and caused DNA fragmentation leading to DNA damage...
February 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29550351/peripubertal-serum-dioxin-concentrations-and-subsequent-sperm-methylome-profiles-of-young-russian-adults
#20
J Richard Pilsner, Alex Shershebnev, Yulia Medvedeva, Alexander Suvorov, Haotian Wu, Andrey Goltsov, Evgeny Loukianov, Tatiana Andreeva, Fedor Gusev, Andrey Manakhov, Luidmila Smigulina, Maria Logacheva, Victoria Shtratnikova, Irina Kuznetsova, Peter Speranskiy-Podobed, Jane S Burns, Paige L Williams, Susan Korrick, Mary M Lee, Evgeny Rogaev, Russ Hauser, Oleg Sergeyev
BACKGROUND: The association of exposure to endocrine disrupting chemicals in the peripubertal period with subsequent sperm DNA methylation is unknown. OBJECTIVE: We examined the association of peripubertal serum 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) concentrations with whole-genome bisulfite sequencing (WGBS) of sperm collected in young adulthood. METHODS: The Russian Children's Study is a prospective cohort of 516 boys who were enrolled at 8-9 years of age and provided semen samples at 18-19 years of age...
March 14, 2018: Reproductive Toxicology
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