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https://www.readbyqxmd.com/read/29767959/stabilization-of-immobilized-enzymes-via-the-chaperone-like-activity-of-mixed-lipid-bilayers
#1
Andres F Chaparro Sosa, Daniel F Kienle, Rebecca M Falatach, Jessica Flanagan, Joel L Kaar, Daniel K Schwartz
Biomimetic lipid bilayers represent intriguing materials for enzyme immobilization, which is critical for many biotechnological applications. Here, through the creation of mixed lipid bilayers, the retention of immobilized enzyme structure and catalytic activity are dramatically enhanced. The enhancement in the retention of enzyme structure, which correlated with an increase in enzyme activity, is observed using dynamic single-molecule (SM) fluorescence methods. The results of SM analysis specifically show that lipid bilayers composed of mixtures of 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and 1,2-dioleoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (DOPG) stabilize the folded state of nitroreductase (NfsB) increasing the rate of re-folding relative to unfolding of enzyme molecules on the bilayer surface...
May 16, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29757347/role-of-inhibitory-control-in-modulating-focal-seizure-spread
#2
Jyun-You Liou, Hongtao Ma, Michael Wenzel, Mingrui Zhao, Eliza Baird-Daniel, Elliot H Smith, Andy Daniel, Ronald Emerson, Rafael Yuste, Theodore H Schwartz, Catherine A Schevon
Focal seizure propagation is classically thought to be spatially contiguous. However, distribution of seizures through a large-scale epileptic network has been theorized. Here, we used a multielectrode array, wide field calcium imaging, and two-photon calcium imaging to study focal seizure propagation pathways in an acute rodent neocortical 4-aminopyridine model. Although ictal neuronal bursts did not propagate beyond a 2-3-mm region, they were associated with hemisphere-wide field potential fluctuations and parvalbumin-positive interneuron activity outside the seizure focus...
May 10, 2018: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29733722/patient-centered-precision-health-in-a-learning-health-care-system-geisinger-s-genomic-medicine-experience
#3
Marc S Williams, Adam H Buchanan, F Daniel Davis, W Andrew Faucett, Miranda L G Hallquist, Joseph B Leader, Christa L Martin, Cara Z McCormick, Michelle N Meyer, Michael F Murray, Alanna K Rahm, Marci L B Schwartz, Amy C Sturm, Jennifer K Wagner, Janet L Williams, Huntington F Willard, David H Ledbetter
Health care delivery is increasingly influenced by the emerging concepts of precision health and the learning health care system. Although not synonymous with precision health, genomics is a key enabler of individualized care. Delivering patient-centered, genomics-informed care based on individual-level data in the current national landscape of health care delivery is a daunting challenge. Problems to overcome include data generation, analysis, storage, and transfer; knowledge management and representation for patients and providers at the point of care; process management; and outcomes definition, collection, and analysis...
May 2018: Health Affairs
https://www.readbyqxmd.com/read/29730037/parental-hormones-are-associated-with-crop-loss-and-family-sickness-following-catastrophic-flooding-in-lowland-bolivia
#4
Benjamin C Trumble, Jonathan Stieglitz, Adrian V Jaeggi, Bret Beheim, Matthew Schwartz, Edmond Seabright, Daniel Cummings, Hillard Kaplan, Michael Gurven
The physiology of fatherhood is a growing field of study, and variability in hormonal mediators of reproductive effort (e.g. testosterone, cortisol) can predict variability in paternal investment. Studies often find that lower testosterone levels are associated with increased paternal investment, though most studies are conducted under relatively stable ecological conditions. In this paper, we examine parental physiological correlates of crop loss and family health problems among Tsimane forager-horticulturalists following a catastrophic flood in lowland Bolivia...
May 2, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29729322/methamphetamine-augment-hiv-1-tat-mediated-memory-deficits-by-altering-the-expression-of-synaptic-proteins-and-neurotrophic-factors
#5
Anantha Ram Nookala, Daniel C Schwartz, Nitish S Chaudhari, Alexy Glazyrin, Edward B Stephens, Nancy E J Berman, Anil Kumar
Methamphetamine (METH) abuse is common among individuals infected with HIV-1 and has been shown to affect HIV replication and pathogenesis. These HIV-1 infected individuals also exhibit greater neuronal injury and higher cognitive decline. HIV-1 proteins, specifically gp120 and HIV-1 Tat, have been earlier shown to affect neurocognition. HIV-1 Tat, a viral protein released early during HIV-1 replication, contributes to HIV-associated neurotoxicity through various mechanisms including production of pro-inflammatory cytokines, reactive oxygen species and dysregulation of neuroplasticity...
May 2, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29704651/pediatric-program-director-minimum-milestone-expectations-before-allowing-supervision-of-others-and-unsupervised-practice
#6
Su-Ting T Li, Daniel J Tancredi, Alan Schwartz, Ann Guillot, Ann E Burke, R Franklin Trimm, Susan Guralnick, John D Mahan, Kimberly Gifford
BACKGROUND: The Accreditation Council for Graduate Medical Education requires semiannual Milestone reporting on all residents. Milestone expectations of performance are unknown. OBJECTIVE: Determine pediatric program director (PD) minimum Milestone expectations for residents prior to being ready to supervise and prior to being ready to graduate. METHODS: Mixed methods survey of pediatric PDs on their programs' Milestone expectations before residents are ready to supervise and before they are ready to graduate, and in what ways PDs use Milestones to make supervision and graduation decisions...
April 25, 2018: Academic Pediatrics
https://www.readbyqxmd.com/read/29700637/lateral-preoptic-and-ventral-pallidal-roles-in-locomotion-and-other-movements
#7
Suriya Subramanian, Rhett A Reichard, Hunter S Stevenson, Zachary M Schwartz, Kenneth P Parsley, Daniel S Zahm
The lateral preoptic area (LPO) and ventral pallidum (VP) are structurally and functionally distinct territories in the subcommissural basal forebrain. It was recently shown that unilateral infusion of the GABAA receptor antagonist, bicuculline, into the LPO strongly invigorates exploratory locomotion, whereas bicuculline infused unilaterally into the VP has a negligible locomotor effect, but when infused bilaterally, produces vigorous, abnormal pivoting and gnawing movements and compulsive ingestion. This study was done to further characterize these responses...
April 26, 2018: Brain Structure & Function
https://www.readbyqxmd.com/read/29688108/a-novel-workplace-based-assessment-for-competency-based-decisions-and-learner-feedback
#8
Patricia J Hicks, Melissa J Margolis, Carol L Carraccio, Brian E Clauser, Kathleen Donnelly, H Barrett Fromme, Kimberly A Gifford, Sue E Poynter, Daniel J Schumacher, Alan Schwartz
BACKGROUND: Increased recognition of the importance of competency-based education and assessment has led to the need for practical and reliable methods to assess relevant skills in the workplace. METHODS: A novel milestone-based workplace assessment system was implemented in 15 pediatrics residency programs. The system provided: (1) web-based multisource feedback (MSF) and structured clinical observation (SCO) instruments that could be completed on any computer or mobile device; and (2) monthly feedback reports that included competency-level scores and recommendations for improvement...
April 24, 2018: Medical Teacher
https://www.readbyqxmd.com/read/29660848/international-collaborative-study-to-assess-cardiovascular-risk-and-evaluate-long-term-health-in-cats-with-preclinical-hypertrophic-cardiomyopathy-and-apparently-healthy-cats-the-reveal-study
#9
Philip R Fox, Bruce W Keene, Kenneth Lamb, Karsten A Schober, Valerie Chetboul, Virginia Luis Fuentes, Gerhard Wess, Jessie Rose Payne, Daniel F Hogan, Alison Motsinger-Reif, Jens Häggström, Emilie Trehiou-Sechi, Deborah M Fine-Ferreira, Reid K Nakamura, Pamela M Lee, Manreet K Singh, Wendy A Ware, Jonathan A Abbott, Geoffrey Culshaw, Sabine Riesen, Michele Borgarelli, Michael B Lesser, Nicole Van Israël, Etienne Côté, John E Rush, Barret Bulmer, Roberto A Santilli, Andrea C Vollmar, Maribeth J Bossbaly, Nadine Quick, Claudio Bussadori, Janice M Bright, Amara H Estrada, Dan G Ohad, Maria Josefa Fernández-Del Palacio, Jenifer Lunney Brayley, Denise S Schwartz, Christina M Bové, Sonya G Gordon, Seung Woo Jung, Paola Brambilla, N Sydney Moïse, Christopher D Stauthammer, Rebecca L Stepien, Cecilia Quintavalla, Christophe Amberger, Ferenc Manczur, Yong-Wei Hung, Remo Lobetti, Marie De Swarte, Alice Tamborini, Carmel T Mooney, Mark A Oyama, Andrey Komolov, Yoko Fujii, Romain Pariaut, Masami Uechi, Victoria Yukie Tachika Ohara
BACKGROUND: Hypertrophic cardiomyopathy is the most prevalent heart disorder in cats and principal cause of cardiovascular morbidity and mortality. Yet, the impact of preclinical disease is unresolved. HYPOTHESIS/OBJECTIVES: Observational study to characterize cardiovascular morbidity and survival in cats with preclinical nonobstructive (HCM) and obstructive (HOCM) hypertrophic cardiomyopathy and in apparently healthy cats (AH). ANIMALS: One thousand seven hundred and thirty client-owned cats (430 preclinical HCM; 578 preclinical HOCM; 722 AH)...
April 16, 2018: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29648617/society-of-behavioral-medicine-sbm-position-statement-enact-taxes-on-sugar-sweetened-beverages-to-prevent-chronic-disease
#10
Daniel R Taber, Akilah Dulin-Keita, Megan Fallon, Frank J Chaloupka, Tatiana Andreyeva, Marlene B Schwartz, Jennifer L Harris
The Society of Behavioral Medicine (SBM) encourages stakeholders to implement a sugar sweetened beverage excise tax. Sugar sweetened beverages are the largest source of added sugars in the USA and have detrimental effects on population health by increasing risks for chronic diseases. Based on existing research evidence, SBM supports an excise tax equivalent to at least 20% to meaningfully affect consumption patterns. As evidenced by research studies in Mexico and the USA, sugar sweetened beverage taxes can have positive impacts on population health and can raise significant tax revenue...
April 10, 2018: Translational Behavioral Medicine
https://www.readbyqxmd.com/read/29625879/tivantinib-for-second-line-treatment-of-met-high-advanced-hepatocellular-carcinoma-metiv-hcc-a-final-analysis-of-a-phase-3-randomised-placebo-controlled-study
#11
Lorenza Rimassa, Eric Assenat, Markus Peck-Radosavljevic, Marc Pracht, Vittorina Zagonel, Philippe Mathurin, Elena Rota Caremoli, Camillo Porta, Bruno Daniele, Luigi Bolondi, Vincenzo Mazzaferro, William Harris, Nevena Damjanov, Davide Pastorelli, María Reig, Jennifer Knox, Francesca Negri, Jörg Trojan, Carlos López López, Nicola Personeni, Thomas Decaens, Marie Dupuy, Wolfgang Sieghart, Giovanni Abbadessa, Brian Schwartz, Maria Lamar, Terri Goldberg, Dale Shuster, Armando Santoro, Jordi Bruix
BACKGROUND: Tivantinib (ARQ 197), a selective, oral MET inhibitor, improved overall survival and progression-free survival compared with placebo in a randomised phase 2 study in patients with high MET expression (MET-high) hepatocellular carcinoma previously treated with sorafenib. The aim of this phase 3 study was to confirm the results of the phase 2 trial. METHODS: We did a phase 3, randomised, double-blind, placebo-controlled study in 90 centres in Australia, the Americas, Europe, and New Zealand...
April 3, 2018: Lancet Oncology
https://www.readbyqxmd.com/read/29617535/association-of-methylation-signals-with-incident-coronary-heart-disease-in-an-epigenome-wide-assessment-of-circulating-tumor-necrosis-factor-%C3%AE
#12
Stella Aslibekyan, Golareh Agha, Elena Colicino, Anh N Do, Jari Lahti, Symen Ligthart, Riccardo E Marioni, Carola Marzi, Michael M Mendelson, Toshiko Tanaka, Matthias Wielscher, Devin M Absher, Luigi Ferrucci, Oscar H Franco, Christian Gieger, Harald Grallert, Dena Hernandez, Tianxiao Huan, Stella Iurato, Roby Joehanes, Allan C Just, Sonja Kunze, Honghuang Lin, Chunyu Liu, James B Meigs, Joyce B J van Meurs, Ann Zenobia Moore, Annette Peters, Holger Prokisch, Katri Räikkönen, Wolfgang Rathmann, Michael Roden, Katharina Schramm, Joel D Schwartz, John M Starr, André G Uitterlinden, Pantel Vokonas, Melanie Waldenberger, Chen Yao, Degui Zhi, Andrea A Baccarelli, Stefania Bandinelli, Ian J Deary, Abbas Dehghan, Johan Eriksson, Christian Herder, Marjo-Riitta Jarvelin, Daniel Levy, Donna K Arnett
Importance: Tumor necrosis factor α (TNF-α) is a proinflammatory cytokine with manifold consequences for mammalian pathophysiology, including cardiovascular disease. A deeper understanding of TNF-α biology may enhance treatment precision. Objective: To conduct an epigenome-wide analysis of blood-derived DNA methylation and TNF-α levels and to assess the clinical relevance of findings. Design, Setting, and Participants: This meta-analysis assessed epigenome-wide associations in circulating TNF-α concentrations from 5 cohort studies and 1 interventional trial, with replication in 3 additional cohort studies...
April 4, 2018: JAMA Cardiology
https://www.readbyqxmd.com/read/29617494/transcatheter-aortic-valve-replacement-the-experience-of-one-brazilian-health-care-center
#13
Fabiula Schwartz Azevedo, Marcelo Goulart Correa, Débora Holanda Gonçalves Paula, Alex Dos Santos Felix, Luciano Herman Juaçaba Belém, Ana Paula Chedid Mendes, Valeria Gonçalves Silva, Bruno Miranda Marques, Andrey José de Oliveira Monteiro, Clara Weksler, Alexandre Siciliano Colafranceschi, Daniel Arthur Barata Kasal
OBJECTIVE: Transcatheter aortic valve replacement has been an alternative to invasive treatment for symptomatic severe aortic stenosis in high risk patients. The primary endpoint was 30-day and 1-year mortality from any cause. Secondary endpoints were to compare the clinical and echocardiographic variation pre-and post- transcatheter aortic valve replacement, and the occurrence of complications throughout a 4-year follow-up period. METHODS: This prospective cohort, nestled to a multicenter study (Registro Brasileiro de Implante de Bioprótese por Cateter), describes the experience of a public tertiary center in transcatheter aortic valve replacement...
January 2018: Brazilian Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29578108/initiative-for-early-lung-cancer-research-on-treatment-development-of-study-design-and-pilot-implementation
#14
Raja Flores, Emanuela Taioli, David F Yankelevitz, Betsy Jane Becker, Artit Jirapatnakul, Anthony Reeves, Rebecca Schwartz, Rowena Yip, Esther Fevrier, Kathleen Tam, Benjamin Steiger, Claudia I Henschke, Raja Flores, Andrew Kaufman, Dong-Seok Lee, Daniel Nicastri, Andrea Wolf, Kenneth Rosenzweig, Jorge Gomez, Mary Beth Beasley, Maureen Zakowski, Michael Chung, David Yankelevitz, Claudia Henschke, Rita Futamura, Sydney Kantor, Carly Wallace, Faiz Bhora, Wissam Raad, Andrew Evans, Walter Choi, Zrzu Buyuk, Adie Friedman, Ronald Dreifuss, Stacey Verzosa, Mariya Yakubox, Karina Aloferdova, Patricia Stacey, Simone De Nobrega, Rita Futamura, Sydney Kantor, Carly Wallace, Ardeshir Hakami, Kathleen Tam, Carly Wallace, Harvey Pass, Berne Crawford, Jessica Donnington, Benjamin Cooper, Andre Moreirea, Audrey Sorensen, Leslie Kohman, Robert Dunton, Jason Wallen, Christopher Curtiss, Ernest Scalzetti, Linda Ellinwood, Ralph Aye, Eric Vallieres, Brian Louie, Alex Frivar, Vivek Mehta, Kristin Manning, Maria Chona, Andrew Smith, Clifford P Connery, Emilo Torres, Dan Cruzer, Bruce Gendron, Sonya Alyea, Daniel Lackaye, Lauren Studer, Raja Flores, Claudia Henschke, Emanuela Taioli, David Yankelevitz, Betsy Becker, Artit Jirapatnakul, Anthony Reeves, Rebecca Schwartz, Rowena Yip, Esther Fevrier, Kathleen Tam, Benjamin Steiger
PURPOSE: To maximize the benefits of CT screening for lung cancer, optimal treatment is for small, early lung cancers is needed. Limiting the extent of surgery spares lung tissue, preserves pulmonary function, and decreases operative time, complications, and morbidities. It also increases the likelihood of resecting future new primary lung cancers. The goal is to assess alternative treatments in a timely manner. METHODS: The focus sessions with patients and physicians separately highlighted the need to consider their perceptions...
March 22, 2018: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/29550906/stress-and-resilience-key-correlates-of-mental-health-and-substance-use-in-the-hispanic-community-health-study-of-latino-youth
#15
Krista M Perreira, Ashley N Marchante, Seth J Schwartz, Carmen R Isasi, Mercedes R Carnethon, Heather L Corliss, Robert C Kaplan, Daniel A Santisteban, Denise C Vidot, Linda Van Horn, Alan M Delamater
This study examined associations of immigrant generation, acculturation, and sources of stress and resilience with four outcomes-depression symptoms, anxiety symptoms, alcohol susceptibility, and smoking susceptibility. We used data from 1466 youth (ages 8-16) enrolled in the Hispanic Community Health Study of Latino Youth (SOL Youth), a probability sample of Hispanic/Latino youth living in Chicago (IL), Miami (FL), Bronx (NY), and San Diego (CA). We found no evidence of an immigrant paradox. Greater children's acculturative stress was associated with depression/anxiety symptoms; greater parent's acculturative stress was associated with smoking susceptibility...
March 17, 2018: Journal of Immigrant and Minority Health
https://www.readbyqxmd.com/read/29527571/comparative-study-of-multicellular-tumor-spheroid-formation-methods-and-implications-for-drug-screening
#16
Maria F Gencoglu, Lauren E Barney, Christopher L Hall, Elizabeth A Brooks, Alyssa D Schwartz, Daniel C Corbett, Kelly R Stevens, Shelly R Peyton
Improved in vitro models are needed to better understand cancer progression and bridge the gap between in vitro proof-of-concept studies, in vivo validation, and clinical application. Multicellular tumor spheroids (MCTS) are a popular method for three-dimensional (3D) cell culture, because they capture some aspects of the dimensionality, cell-cell contact, and cell-matrix interactions seen in vivo. Many approaches exist to create MCTS from cell lines, and they have been used to study tumor cell invasion, growth, and how cells respond to drugs in physiologically relevant 3D microenvironments...
February 12, 2018: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/29526795/consensus-recommendations-for-trabecular-meshwork-cell-isolation-characterization-and-culture
#17
Kate E Keller, Sanjoy K Bhattacharya, Theresa Borrás, Thomas M Brunner, Sunee Chansangpetch, Abbott F Clark, W Michael Dismuke, Yiqin Du, Michael H Elliott, C Ross Ethier, Jennifer A Faralli, Thomas F Freddo, Rudolf Fuchshofer, Michael Giovingo, Haiyan Gong, Pedro Gonzalez, Alex Huang, Murray A Johnstone, Paul L Kaufman, Mary J Kelley, Paul A Knepper, Casey C Kopczynski, John G Kuchtey, Rachel W Kuchtey, Markus H Kuehn, Raquel L Lieberman, Shan C Lin, Paloma Liton, Yutao Liu, Elke Lütjen-Drecoll, Weiming Mao, Marisse Masis-Solano, Fiona McDonnell, Colleen M McDowell, Darryl R Overby, Padmanabhan P Pattabiraman, Vijay K Raghunathan, P Vasanth Rao, Douglas J Rhee, Uttio Roy Chowdhury, Paul Russell, John R Samples, Donald Schwartz, Evan B Stubbs, Ernst R Tamm, James C Tan, Carol B Toris, Karen Y Torrejon, Janice A Vranka, Mary K Wirtz, Thomas Yorio, Jie Zhang, Gulab S Zode, Michael P Fautsch, Donna M Peters, Ted S Acott, W Daniel Stamer
Cultured trabecular meshwork (TM) cells are a valuable model system to study the cellular mechanisms involved in the regulation of conventional outflow resistance and thus intraocular pressure; and their dysfunction resulting in ocular hypertension. In this review, we describe the standard procedures used for the isolation of TM cells from several animal species including humans, and the methods used to validate their identity. Having a set of standard practices for TM cells will increase the scientific rigor when used as a model, and enable other researchers to replicate and build upon previous findings...
March 9, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29518404/microrna-signatures-discriminate-between-uterine-and-ovarian-serous-carcinomas
#18
Pei Hui, Stefan M Gysler, Mohamed Uduman, Taiwo A Togun, Daniel E Prado, Christine E Richter, Sunitha Nallur, Peter E Schwartz, Thomas J Rutherford, Alessandro D Santin, Joanne B Weidhaas, Elena S Ratner
Synchronous endometrial and ovarian malignancies occur in 5% of women presenting with endometrial cancer and 10% of patients presenting with ovarian malignancy. When a high-grade serous carcinoma concurrently involves both ovary and endometrium, pathological determination of whether they are synchronous primaries or metastatic tumors from one primary site can be challenging. MicroRNAs (miRNA) are 22-nucleotide noncoding RNAs that are aberrantly expressed in cancer cells and may inherit their cellular linage characteristics...
March 5, 2018: Human Pathology
https://www.readbyqxmd.com/read/29509546/a-pet-imaging-agent-for-evaluating-parp-1-expression-in-ovarian-cancer
#19
Mehran Makvandi, Austin Pantel, Lauren Schwartz, Erin Schubert, Kuiying Xu, Chia-Ju Hsieh, Catherine Hou, Hyoung Kim, Chi-Chang Weng, Harrison Winters, Robert Doot, Michael D Farwell, Daniel A Pryma, Roger A Greenberg, David A Mankoff, Fiona Simpkins, Robert H Mach, Lilie L Lin
BACKGROUND: Poly(ADP-ribose) polymerase (PARP) inhibitors are effective in a broad population of patients with ovarian cancer; however, resistance caused by low enzyme expression of the drug target PARP-1 remains to be clinically evaluated in this context. We hypothesize that PARP-1 expression is variable in ovarian cancer and can be quantified in primary and metastatic disease using a novel PET imaging agent. METHODS: We used a translational approach to describe the significance of PET imaging of PARP-1 in ovarian cancer...
May 1, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29501670/amino-acid-level-signal-to-noise-analysis-of-incidentally-identified-variants-in-genes-associated-with-long-qt-syndrome-during-pediatric-whole-exome-sequencing-reflects-background-genetic-noise
#20
Andrew P Landstrom, Ernesto Fernandez, Jill A Rosenfeld, Yaping Yang, Andrew L Dailey-Schwartz, Christina Y Miyake, Hugh D Allen, Daniel J Penny, Jeffrey J Kim
BACKGROUND: Due to rapid expansion of clinical genetic testing, an increasing number of genetic variants of undetermined significance and unclear diagnostic value are being identified in children. Variants found in genes associated with heritable channelopathies, such as long QT syndrome (LQTS), are particularly difficult to interpret given the risk of sudden cardiac death associated with pathologic mutations. OBJECTIVE: The purpose of this study was to determine whether variants in LQTS-associated genes from whole exome sequencing (WES) represent disease-associated biomarkers or background genetic "noise...
March 2, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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