1,277 results on '"Y H Kim"'
Search Results
102. Gravity wave reflection and its influence on the consistency of temperature- and wind-based momentum fluxes simulated above Typhoon Ewiniar
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Y.-H. Kim, H.-Y. Chun, P. Preusse, M. Ern, and S.-Y. Kim
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Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
For a case study of Typhoon Ewiniar performed with a mesoscale model, we compare stratospheric gravity wave (GW) momentum flux determined from temperature variances by applying GW polarization relations and by assuming upward propagating waves, with GW momentum flux calculated from model winds which is considered as a reference. The temperature-based momentum-flux profile exhibits positive biases relative to the reference, which fluctuate significantly with altitude. The vertically-averaged magnitude of the positive biases is about 14% of the reference momentum flux. We found that this deviation from the reference stems from the interference between upward and downward propagating waves. The downward propagating GWs are due mainly to partial reflections of upward propagating waves at altitudes where the background wind and stability change with height. When the upward and downward propagating waves are decomposed and their momentum fluxes are calculated separately from temperature perturbations, the fraction of the momentum flux arising from the downward propagating waves is about 4.5–8.2% of that from the upward propagating waves. The net momentum flux of upward and downward propagating GWs agrees well with the reference from the model wind perturbations. The implications of this study for the GW momentum-flux observations from satellites are discussed.
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- 2012
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103. Consistency between Fourier transform and small-volume few-wave decomposition for spectral and spatial variability of gravity waves above a typhoon
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C. I. Lehmann, Y.-H. Kim, P. Preusse, H.-Y. Chun, M. Ern, and S.-Y. Kim
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Environmental engineering ,TA170-171 ,Earthwork. Foundations ,TA715-787 - Abstract
Convective gravity wave (GW) sources are spatially localized and emit at the same time waves with a wide spectrum of phase speeds. Any wave analysis therefore compromises between spectral and spatial resolution. Future satellite borne limb imagers will for a first time provide real 3-D volumes of observations. These volumes will be however limited which will impose further constraints on the analysis technique. In this study a three dimensional few-wave approach fitting sinusoidal waves to limited 3-D volumes is introduced. The method is applied to simulated GWs above typhoon Ewiniar and GW momentum flux is estimated from temperature fluctuations. Phase speed spectra as well as average profiles of positive, negative and net momentum fluxes are compared to momentum flux estimated by Fourier transform as well as spatial averaging of wind fluctuations. The results agree within 10–20%. The few-wave method can also reveal the spatial orientation of the GWs with respect to the source. The relevance of the results for different types of measurements as well as its applicability to model data is discussed.
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- 2012
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104. ASO Author Reflections: Could VAMLA be a Therapeutic Strategy in Selected Patients with Left-sided NSCLC?
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J K, Yun and Y-H, Kim
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Lung Neoplasms ,Mediastinoscopy ,Carcinoma, Non-Small-Cell Lung ,Humans - Published
- 2021
105. Source identification and budget analysis on elevated levels of formaldehyde within the ship plumes: a ship-plume photochemical/dynamic model analysis
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C. H. Song, H. S. Kim, R. von Glasow, P. Brimblecombe, J. Kim, R. J. Park, J. H. Woo, and Y. H. Kim
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Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Elevated levels of formaldehyde (HCHO) along the ship corridors have been observed by satellite sensors, such as ESA/ERS-2 GOME (Global Ozone Monitoring Experiment), and were also simulated by global 3-D chemistry-transport models. In this study, three likely sources of the elevated HCHO levels in the ship plumes as well as their contributions to the elevated HCHO levels (budget) were investigated using a newly-developed ship-plume photochemical/dynamic model: (1) primary HCHO emission from ships; (2) secondary HCHO production via the atmospheric oxidation of non-methane volatile organic compounds (NMVOCs) emitted from ships; and (3) atmospheric oxidation of CH4 within the ship plumes. For this ship-plume modelling study, the ITCT 2K2 (Intercontinental Transport and Chemical Transformation 2002) ship-plume experiment, which was carried out about 100 km off the coast of California on 8 May 2002 (11:00 local standard time), was chosen as a base study case because it is the best defined in terms of (1) meteorological data, (2) in-plume chemical composition, and (3) background chemical composition. From multiple ship-plume model simulations for the ITCT 2K2 ship-plume experiment case, CH4 oxidation by elevated levels of in-plume OH radicals was found to be the main factor responsible for the elevated levels of HCHO in the ITCT 2K2 ship-plume. More than ~88% of the HCHO for the ITCT 2K2 ship-plume is produced by this atmospheric chemical process, except in the areas close to the ship stacks where the main source of the elevated HCHO levels would be primary HCHO from the ships (due to the deactivation of CH4 oxidation from the depletion of in-plume OH radicals). Because of active CH4 oxidation by OH radicals, the instantaneous chemical lifetime of CH4 (τCH4) decreased to ~0.45 yr inside the ship plume, which is in contrast to τCH4 of ~1.1 yr in the background (up to ~41% decrease) for the ITCT 2K2 ship-plume case. A variety of likely ship-plume situations at three different latitudinal locations within the global ship corridors was also studied to determine the enhancements in the HCHO levels in the marine boundary layer (MBL) influenced by ship emissions. It was found that the ship-plume HCHO levels could be 19.9–424.9 pptv higher than the background HCHO levels depending on the latitudinal locations of the ship plumes (i.e., intensity of solar radiation and temperature), MBL stability and NOx emission rates. On the other hand, NMVOC emissions from ships were not found to be a primary source of photochemical HCHO production inside ship plumes due to their rapid and individual dilution. However, the diluted NMVOCs would contribute to the HCHO productions in the background air.
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- 2010
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106. Seasonal Characteristics of the Longitudinal Wavenumber-4 Structure in the Equatorial Ionospheric Anomaly
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E. Kim, G. Jee, and Y. H. Kim
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equatorial ionosphere ,equatorial anomaly ,total electron content (TEC) ,tidal winds ,upper and lower atmospheres coupling ,Astronomy ,QB1-991 - Abstract
Using the global total electron contents (TEC) measured by the TOPEX satellite from Aug. 1992 to Oct. 2005, we investigate the variations of the longitudinal wavenumber-4 (LW-4) structure in the equatorial anomaly (EA) crests with season, local time, and solar activity. Our study shows that the LW-4 structure in the EA crests (5~20 degrees) MLAT in both hemispheres) has clear four peaks at fixed longitude sectors during the daytime for both equinoxes and June solstice. In spite of being called a wavelike structure, however, the magnitudes and spatial intervals of the four peaks are far from being the same or regular. After sunset, the four-peak structure begins to move eastward with gradual weakening in its amplitude during equinoxes and this weakening proceeds much faster during June solstice. Interestingly, the longitudinal variations during December solstice do not show clear four-peak structure. All these features of the LW-4 structure are almost the same for both low and high solar activity conditions although the ion densities are greatly enhanced from low to high solar activities. With the irrelevancy of the magnetic activity in the LW-4, this implies that the large changes of the upper atmospheric ion densities, one of the important factors for ion-neutral interactions, have little effect on the formation of the LW-4 structure. On the other hand, we found that the monthly variation of the LW-4 is remarkably similar to that of the zonal component of wavenumber-3 diurnal tides at low latitudes, which implies that the lower atmospheric tidal forcing, transferred to the upper atmosphere, seems to have a dominant role in producing the LW-4 structure in the EA crests via the E-region dynamo.
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- 2008
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107. The role of the vertical E×B drift for the formation of the longitudinal plasma density structure in the low-latitude F region
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S.-J. Oh, H. Kil, W.-T. Kim, L. J. Paxton, and Y. H. Kim
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
The formation of a longitudinally periodic plasma density structure in the low-latitude F region by the effect of vertical E×B drift was investigated by analyzing the ROCSAT-1 satellite data and conducting SAMI2 model simulations. The daytime equatorial ionosphere observed during the equinox in 1999–2002 from ROCSAT-1 showed the formation of wave number-4 structures in the plasma density and vertical plasma drift. The coincidence of the longitudes of the peak density with the longitudes of the peak upward drift velocity during the daytime supported the association of the longitudinal density structure with the vertical E×B drift. The reproduction capability of the observed wave-4 structure by the effect of vertical E×B drift was tested by conducting SAMI2 model simulations during the equinox under solar maximum condition. When the ROCSAT-1 vertical drift data were used, the SAMI2 model could reproduce the observed wave-4 density structure in the low-latitude F region. On the other hand, the SAMI2 model could not reproduce the observed wave-4 structure using the Scherliess and Fejer vertical E×B drift model. The observation and model simulation results demonstrated that the formation of the longitudinally periodic plasma density structure can be explained by the longitudinal variation of the daytime vertical E×B drift.
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- 2008
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108. Prediction of radiation-related cardiotoxicity using F-18 FDG PET in non-small-cell lung cancer
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S G Cho, Y H Kim, H J Park, K S Park, J H Kim, S J Ahn, and H S Bom
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Cardiology and Cardiovascular Medicine - Abstract
Background Radiation-related cardiotoxicity has been refocused nowadays as the follow-up was increased amomg the patients with advanced lung cancer. The early recognition of the occult cardiotoxicity enables the early intervention preventing clinically significant cardiac events or worsening of severity. Purpose We aim to search whether the F-18 fluorodeoxyglucose positron emission tomography (FDG PET) performed immediately after radiotherapy could predict the late cardiac events. Methods We retrospectively enrolled 133 patients with locally advanced, unresectable stage III NSCLC who underwent F-18 fluorodeoxyglucose positron emission tomography (FDG PET) immediately after CCRT for the response evaluation and survived at least for 6 months. Heart was recontoured according to the RTOG 0617 secondary analysis atlas for the dose volume analysis. Standardized uptake values (SUV) of the left ventricular myocardium were measured on FDG PET images. The patients were regularly followed up for the disease progression and complications. The primary end-point was the cardiac events grade ≥2 based on the Common Terminology Criteria for Adverse Events (version 5.0). Results FDG PET was performed at median interval of 11 days after CCRT. Fourty-two patients experienced cardiotoxicity during a median follow-up of 47 months (range, 12 – 123 months). In univariable analysis, mean heart dose, maximum SUV of the left ventricle (LV SUVmax), white blood cell count, and diabetes were associated with the risk of cardiotoxicity. In multivariable analysis, only higher mean heart dose (>11.1 Gy, hazard ratio 3.930 [95% confidence interval 1.933–7.988]; p=0.0002) and higher LV SUVmax (>12.84, 2.189 [1.162–4.124]; p=0.0152) were independently associated with increased risk of cardiotoxicity. In subgroup analyses, LV SUVmax remained predictive of cardiotoxicity among those with higher mean heart dose, but not among those with lower mean heart dose. Conclusion Early FDG PET after CCRT for NSCLC could predict the late cardiac events, especially in patients with high dose cardiac irradiation. Funding Acknowledgement Type of funding sources: Public Institution(s). Main funding source(s): This work was supported by a grant of the Basic Science Research Program through the National Research Foundation funded by the Ministry of Education, Republic of Korea (Principal Investigator: Sang-Geon Cho)
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- 2021
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109. Temporal trend of clinical events in patients with atrial fibrillation on edoxaban therapy: results from the non-interventional global ETNA-AF program
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Takanori Yamashita, Cathy Chen, Y.-H Kim, Ladislav Pecen, Paulus Kirchhof, R. De Caterina, P.E. Reimitz, Leon Dinshaw, Doralisa Morrone, Yukihiro Koretsune, W Jiang, Martin Unverdorben, and C.-C Wang
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medicine.medical_specialty ,Clinical events ,business.industry ,Atrial fibrillation ,medicine.disease ,chemistry.chemical_compound ,chemistry ,Edoxaban ,Internal medicine ,Non interventional ,Cardiology ,medicine ,In patient ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background Patients with atrial fibrillation (AF) who initiated vitamin K antagonist (VKA) were at highest risk of stroke and bleeding in the first few months of therapy. Understanding of the temporal trend of clinical events in AF patients on non-VKA oral anticoagulant (NOAC) therapy should aid therapeutic decisions. Purpose To evaluate the temporal trend of clinical events in AF patients receiving edoxaban in routine clinical practice in the Global ETNA-AF program. Methods Global ETNA-AF is a multicentre, prospective, noninterventional program evaluating the safety and effectiveness of edoxaban in patients from European and Asian countries. Thromboembolic, bleeding and death events were analysed separately for the 1st and 2nd year of the follow-up period, using a time-to-first-event estimation of cumulative incidence and annual rate via Kaplan-Meier method. Results A total of 27,617 patients were included in this analysis, 48.6% from Europe and 51.4% from Japan, Korea, and Taiwan. Baseline characteristics were consistent with typical AF population in real world studies (Table 1). Approximately 83% of patients received the recommended edoxaban dose. Annualized rates of ischaemic stroke and major bleeding (ISTH) were lower in the 2nd year than in the 1st year: ischaemic stroke 0.59% (95% CI, 0.50–0.70) vs 0.86% (95% CI, 0.75–0.98), p=0.015; major bleeding 0.87% (95% CI, 0.75–1.00) vs 1.15% (95% CI, 1.02–1.29), p=0.036. The trend toward lower rates of ischaemic stroke and major bleeding in the 2nd year was consistent across regions. All-cause mortality increased slightly from the 1st year to the 2nd year, which was not statistically significant and was not driven by cardiovascular (CV) mortality (Table 2). Conclusion In routine clinical practice in the Global ETNA-AF program, major bleeding and ischaemic stroke rates in >27,000 patients on edoxaban therapy declined from 1st year to 2nd year. Further analyses will investigate whether such trend is influenced by selection for healthier patients over time. Longer follow-up is needed to better understand long-term trends. Funding Acknowledgement Type of funding sources: Private company. Main funding source(s): Daiichi Sankyo Table 1. Baseline characteristicsTable 2. Annualised clinical event rates
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- 2021
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110. Edoxaban treatment in real-world practice is highly concordant with ESC atrial fibrillation guidelines: results from the non-interventional global ETNA-AF program
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D Morrone, C Chen, L Dinshaw, W Jiang, Y.-H Kim, P Kirchhof, Y Koretsune, L Pecen, P.-E Reimitz, C.-C Wang, T Yamashita, M Unverdorben, and R De Caterina
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Cardiology and Cardiovascular Medicine - Abstract
Background The ESC atrial fibrillation management guidelines recommend a risk-based approach to oral anticoagulant (OAC) therapy. How clinical practice aligns with these recommendations is of interest. Purpose To analyse real world data from Global ETNA-AF program in patient groups stratified by stroke and bleeding risk scores according to ESC guidelines. Methods Global ETNA-AF is a multicentre, prospective, noninterventional program evaluating the safety and effectiveness of edoxaban in patients from European and Asian countries. Baseline characteristics and clinical event data at 2-year follow-up were analysed in 4 subgroups defined by CHA2DS2-VASc score (≥3 for female / ≥2 for male [OAC recommended] vs 2 for female / 1 for male [OAC should be considered]) and HAS-BLED score (≥3 [Bleeding risk high] vs Results Of 27,616 patients included in this analysis, 23,152 (83.8%) were in the “OAC recommended” category and 3,539 (12.8%) were in the “OAC should be considered” category. Only 3.3% of patients did not meet ESC guideline criteria for OAC initiation. Among patients with high bleeding risk, 98% were in the “OAC recommended” category. A similar distribution was observed across regions (Table 2). The recommended edoxaban dose was used in the vast majority (>80%) of patients across all risk stratification subgroups. In the “OAC recommended” category, patients with high bleeding risk had higher rates of thromboembolic, bleeding, and death events than those with low bleeding risk. Conclusion Data from routine clinical practice in Global ETNA-AF demonstrate high concordance of edoxaban treatment with ESC guidelines. Edoxaban dose is consistent with label recommendation in the vast majority (>80%) of patients. Clinical event rates were generally low across all risk groups, including acceptable bleeding rates in anticoagulated patients with high bleeding risk. Funding Acknowledgement Type of funding sources: Private company. Main funding source(s): Daiichi Sankyo Table 1. Subgroups as per ESC guidelinesTable 2. Patient characteristics & events
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- 2021
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111. Drag Effect of Kompsat-1 During Strong Solar and Geomagnetic Activity
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J. Park, Y.-J. Moon, K.-H. Kim, K.-S. Cho, H.-D. Kim, Y.-H. Kim, Y.-D. Park, and Y. Yi
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satellite drag ,flare ,CMEs ,geomagnetic storms ,Astronomy ,QB1-991 - Abstract
In this paper, we analyze the orbital variation of the KOrea Multi-Purpose SATellite-1(KOMPSAT-1) in a strong space environment due to satellite drag by solar and geomagnetic activities. The satellite drag usually occurs slowly, but becomes serious satellite drag when the space environment suddenly changes via strong solar activity like a big flare eruption or coronal mass ejections(CMEs). Especially, KOMPSAT-1 as a low earth orbit satellite has a distinct increase of the drag acceleration by the variations of atmospheric friction. We consider factors of solar activity to have serious effects on the satellite drag from two points of view. One is an effect of high energy radiation when the flare occurs in the Sun. This radiation heats and expands the upper atmosphere of the Earth as the number of neutral particles is suddenly increased. The other is an effect of Joule and precipitating particle heating caused by current of plasma and precipitation of particles during geomagnetic storms by CMEs. It also affects the density of neutral particles by heating the upper atmosphere. We investigate the satellite drag acceleration associated with the two factors for five events selected based on solar and geomagnetic data from 2001 to 2002. The major results can be summarized as follows. First, the drag acceleration started to increase with solar EUV radiation with the best cross-correlation (r = 0.92) for 1 day delayed F10.7. Second, the drag acceleration and Dst index have similar patterns when the geomagnetic storm is dominant and the drag acceleration abruptly increases during the strong geomagnetic storm. Third, the background variation of the drag accelerations is governed by the solar radiation, while their short term (less than a day) variations is governed by geomagnetic storms.
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- 2007
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112. A CaMoO4 Crystal Low Temperature Detector for the AMoRE Neutrinoless Double Beta Decay Search
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G. B. Kim, S. Choi, F. A. Danevich, A. Fleischmann, C. S. Kang, H. J. Kim, S. R. Kim, Y. D. Kim, Y. H. Kim, V. A. Kornoukhov, H. J. Lee, J. H. Lee, M. K. Lee, S. J. Lee, J. H. So, and W. S. Yoon
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Physics ,QC1-999 - Abstract
We report the development of a CaMoO4 crystal low temperature detector for the AMoRE neutrinoless double beta decay (0νββ) search experiment. The prototype detector cell was composed of a 216 g CaMoO4 crystal and a metallic magnetic calorimeter. An overground measurement demonstrated FWHM resolution of 6–11 keV for full absorption gamma peaks. Pulse shape discrimination was clearly demonstrated in the phonon signals, and 7.6 σ of discrimination power was found for the α and β/γ separation. The phonon signals showed rise-times of about 1 ms. It is expected that the relatively fast rise-time will increase the rejection efficiency of two-neutrino double beta decay pile-up events which can be one of the major background sources in 0νββ searches.
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- 2015
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113. Self-Consolidation Mechanism of Nanostructured Ti5Si3 Compact Induced by Electrical Discharge
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W. H. Lee, Y. W. Cheon, Y. H. Jo, J. G. Seong, Y. J. Jo, Y. H. Kim, M. S. Noh, H. G. Jeong, C. J. Van Tyne, and S. Y. Chang
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Technology ,Medicine ,Science - Abstract
Electrical discharge using a capacitance of 450 μF at 7.0 and 8.0 kJ input energies was applied to mechanical alloyed Ti5Si3 powder without applying any external pressure. A solid bulk of nanostructured Ti5Si3 with no compositional deviation was obtained in times as short as 159 μsec by the discharge. During an electrical discharge, the heat generated is the required parameter possibly to melt the Ti5Si3 particles and the pinch force can pressurize the melted powder without allowing the formation of pores. Followed rapid cooling preserved the nanostructure of consolidated Ti5Si3 compact. Three stepped processes during an electrical discharge for the formation of nanostructured Ti5Si3 compact are proposed: (a) a physical breakdown of the surface oxide of Ti5Si3 powder particles, (b) melting and condensation of Ti5Si3 powder by the heat and pinch pressure, respectively, and (c) rapid cooling for the preservation of nanostructure. Complete conversion yielding a single phase Ti5Si3 is primarily dominated by the solid-liquid mechanism.
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- 2015
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114. On developing an adaptive neural-fuzzy control system.
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Seok Hyeon Kim, Y.-H. Kim, Kwee-Bo Sim, and Hong-Tae Jeon
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- 1993
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115. The Pre-impact Fall Detection using the quantization based on ResNet
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B. M. Koo, J. M. Kim, S. M. Yang, S. H. Lee, M. H. Hong, and Y. H. Kim
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Biomedical Engineering ,Geriatrics and Gerontology ,Gerontology - Published
- 2022
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116. Determination of gait parameters based on multi-sensors
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S. M. Yang, J. M. Kim, B. M. Koo, Y. J. Nam, and Y. H. Kim
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Biomedical Engineering ,Geriatrics and Gerontology ,Gerontology - Published
- 2022
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117. sEMG-based hand posture recognition and visual-feedback training
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J. M. Kim, B. M. Koo, S. M. Yang, Y. J. Nam, and Y. H. Kim
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Biomedical Engineering ,Geriatrics and Gerontology ,Gerontology - Published
- 2022
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118. 1724P Secreted kinase FAM20C promotes stromal remodeling via inflammatory cancer-associated fibroblast activation in pancreatic cancer microenvironment
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M.R. Lee, Y-S. Lee, S. Kang, H.W. Shon, S.M. Woo, and Y-H. Kim
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Oncology ,Hematology - Published
- 2022
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119. What Research Ethics (Often) Gets Wrong about Minimal Risk
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Jonathan Kimmelman, Scott Y. H. Kim, and Patrick Bodilly Kane
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Issues, ethics and legal aspects ,Research ethics ,Scientific Experimental Error ,Nursing ,Minimal risk ,Health Policy ,Usual care ,MEDLINE ,Psychology ,Healthcare system - Abstract
Trials that randomize patients to different “usual care” treatments play a crucial role in helping healthcare systems optimize the delivery of care. Yet, as illustrated by controversies surrounding...
- Published
- 2020
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120. ASO Author Reflections: Could VAMLA be a Therapeutic Strategy in Selected Patients with Left-sided NSCLC?
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J. K. Yun and Y.-H. Kim
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Oncology ,Surgery - Published
- 2022
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121. Productino of KSR-III Airglow Photometers to Measure MUV Airglows of the Upper Atmosphere Above the Korean Peninsular
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T. H. Oh, K. C. Park, Y. H. Kim, Y. Yi, and J. Kim
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ultaraviolet airglow ,photometer ,thermosphere ,Astronomy ,QB1-991 - Abstract
We have constructed two flight models of airglow photometer system (AGP) to be onboard Korea Sounding Rocket-III (KSR-III) for detection of MUV dayglow above the Korean peninsular. The AGP system is designed to detect dayglow emissions of OI 2972 Å, N_2 VK (0,6) 2780Å, N_2 2PG 3150Å and background 3070Å toward the horizon at altitudes between 100 km and 300 km. The AGP system consists of a photometer body, a baffle, an electronic control unit and a battery unit. The MUV dayglow emissions enter through a narrow band interference filter and focusing lens of the photometer, which contains an ultraviolet sensitive photomultiplier tube. The photometer is equipped with an in-flight calibration light source on a circular plane that will rotate at the rocket's apogee. A baffle tube is installed at the entry of the photometer in order to block strong scattering lights from the lower atmosphere. We have carried out laboratory measurements of sensitivity and in-flight calibration light source for the AGP flight models. Although absolute sensitivities of the AGP flight models could not be determined in the country, relative sensitivities among channels are well measured so that observation data during rocket flight in the future can be analyzed with confidence.
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- 2002
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122. Effects of β-carotene on Expression of Selected MicroRNAs, Histone Acetylation, and DNA Methylation in Colon Cancer Stem Cells
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Yuri Kim, Daeun Kim, and Y.-H. Kim
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0301 basic medicine ,Beta carotene ,Epigenomics ,Methyltransferase ,DNA methylation ,biology ,Colorectal neoplasms ,microRNAs ,03 medical and health sciences ,Histone H3 ,030104 developmental biology ,0302 clinical medicine ,Histone ,Acetylation ,030220 oncology & carcinogenesis ,microRNA ,Cancer research ,biology.protein ,Original Article ,Epigenetics - Abstract
Background Beta-carotene (BC) is a carotenoid which exerts anti-cancer effects in several types of cancer, including colorectal cancer. Epigenetic modifications of genes, such as histone deacetylation and DNA hypermethylation, have also been detected in various types of cancer. To understand the molecular mechanism underlying cancer preventive and therapeutic effects of BC, microRNAs (miRNAs), histone acetylation, and global DNA methylation in colon cancer stem cells (CSCs) were investigated. Methods HCT116 colon cancer cells positive for expression of CD44 and CD133 were sorted by flow cytometry and used in subsequent experiments. Cell proliferation was examined by the MTT assay and self-renewal capacity was analyzed by the sphere formation assay. The miRNA sequencing array was used to detect miRNAs regulated by BC. Histone acetylation levels were measured by the Western blot analysis. mRNA expression of DNA methyltransferases (DNMTs) was examined by qPCR and global DNA methylation levels were determined by enzyme-linked immunosorbent assay. Results Treatment of CD44+CD133+ colon CSCs with BC caused a reduction in both cell proliferation and sphere formation. Analysis of the miRNA sequencing array showed that BC regulated expression of miRNAs associated with histone acetylation. Histone H3 and H4 acetylation levels were elevated by BC treatment. In addition, BC treatment down-regulated DNMT3A mRNA expression and global DNA methylation in colon CSCs. Conclusions These results suggest that BC regulates epigenetic modifications for its anti-cancer effects in colon CSCs.
- Published
- 2019
123. l-histidine and l-carnosine accelerate wound healing via regulation of corticosterone and PI3K/Akt phosphorylation in d-galactose-induced aging models in vitro and in vivo
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Yuri Kim, Y.-H. Kim, and Eunju Kim
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0301 basic medicine ,Senescence ,Medicine (miscellaneous) ,Carnosine ,Wound healing ,Pharmacology ,d-galactose ,03 medical and health sciences ,chemistry.chemical_compound ,0404 agricultural biotechnology ,Skin aging ,In vivo ,TX341-641 ,PI3K/AKT/mTOR pathway ,Histidine ,chemistry.chemical_classification ,l-histidine ,030109 nutrition & dietetics ,Nutrition and Dietetics ,Chemistry ,Nutrition. Foods and food supply ,l-carnosine ,04 agricultural and veterinary sciences ,040401 food science ,In vitro ,Amino acid ,Corticosterone ,Food Science - Abstract
Impaired skin wound healing in the elderly can lead to medical issues and increased mortality. Although l -histidine and l -carnosine are potent anti-aging amino acids, the wound healing effects of these amino acids in aging remain to be elucidated. Here, we investigated the regenerative potential of l -histidine and l -carnosine in in vitro and in vivo aging models. l -histidine (1 mM), l -carnosine (10 mM), or a combination improved proliferation, migration, senescence, and epithelial-mesenchymal transition (EMT) in d -galactose-induced aged keratinocytes. An in vivo mouse aging model was established with injection of d -galactose (s.c. 500 mg/kg) daily for eight weeks. Supplementation with l -histidine (2 g/L), l -carnosine (2 g/L), or a combination improved collagen and wound healing with EMT markers, E-cadherin, N-cadherin, and MMP-2. These effects were concomitant with reduced circulating levels of corticosterone and increased PI3K/Akt phosphorylation. These results suggest that l -histidine and l -carnosine have the potential to facilitate wound healing in aging skin.
- Published
- 2019
124. Fabrication and Gamma-Ray Irradiation Effect on Optical and Mechanical Properties of Germano-Silicate Glass Fibers with Inner Cladding of B and F Doped Silica Glasses
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Y. H. Kim, Seong Gu Kang, Y.-T. Ryu, Seongmin Ju, Y. Kim, Y. Lee, Won-Taek Han, Pramod R. Watekar, and K. Linganna
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Optical fiber ,Materials science ,Fabrication ,Silica glass ,Doping ,Physics::Optics ,Gamma ray irradiation ,02 engineering and technology ,Cladding (fiber optics) ,Condensed Matter::Disordered Systems and Neural Networks ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,Condensed Matter::Soft Condensed Matter ,010309 optics ,Condensed Matter::Materials Science ,020210 optoelectronics & photonics ,law ,Condensed Matter::Superconductivity ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Composite material ,Silicate glass - Abstract
The effect of glass composition, pure silica glass, boron-doped and fluorine-doped silica glasses of inner cladding, in the germano-silicate glass core fibers on optical and mechanical prop...
- Published
- 2019
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125. Euthanasia and assisted suicide of persons with psychiatric disorders: the challenge of personality disorders
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Scott Y. H. Kim, G Kevin Donovan, John R. Peteet, and Marie E Nicolini
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,media_common.quotation_subject ,Comorbidity ,Psychological Trauma ,Personality Disorders ,Suicide, Assisted ,Young Adult ,03 medical and health sciences ,Psychiatric treatments ,0302 clinical medicine ,Physicians ,medicine ,Humans ,Personality ,030212 general & internal medicine ,Assisted suicide ,Psychiatry ,Applied Psychology ,Aged ,Netherlands ,media_common ,Aged, 80 and over ,Euthanasia ,business.industry ,Middle Aged ,medicine.disease ,Personality disorders ,030227 psychiatry ,Psychiatry and Mental health ,Physician managing ,Female ,Clinical Ethics ,business ,Self-Injurious Behavior - Abstract
BackgroundEuthanasia or assisted suicide (EAS) for psychiatric disorders, legal in some countries, remains controversial. Personality disorders are common in psychiatric EAS. They often cause a sense of irremediable suffering and engender complex patient–clinician interactions, both of which could complicate EAS evaluations.MethodsWe conducted a directed-content analysis of all psychiatric EAS cases involving personality and related disorders published by the Dutch regional euthanasia review committees (N = 74, from 2011 to October 2017).ResultsMost patients were women (76%, n = 52), often with long, complex clinical histories: 62% had physical comorbidities, 97% had at least one, and 70% had two or more psychiatric comorbidities. They often had a history of suicide attempts (47%), self-harming behavior (27%), and trauma (36%). In 46%, a previous EAS request had been refused. Past psychiatric treatments varied: e.g. hospitalization and psychotherapy were not tried in 27% and 28%, respectively. In 50%, the physician managing their EAS were new to them, a third (36%) did not have a treating psychiatrist at the time of EAS request, and most physicians performing EAS were non-psychiatrists (70%) relying on cross-sectional psychiatric evaluations focusing on EAS eligibility, not treatment. Physicians evaluating such patients appear to be especially emotionally affected compared with when personality disorders are not present.ConclusionsThe EAS evaluation of persons with personality disorders may be challenging and emotionally complex for their evaluators who are often non-psychiatrists. These factors could influence the interpretation of EAS requirements of irremediability, raising issues that merit further discussion and research.
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- 2019
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126. Effect of Pedicle Screw Fixation on Biomechanical Behavior \in Lumbar Spine with Osteoporosis and Disc Degeneration
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E. Y. Park, S. J. Lee, and Y. H. Kim
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business.industry ,Disc degeneration ,Osteoporosis ,Medicine ,Lumbar spine ,Anatomy ,Adjacent segment disease ,Pedicle screw fixation ,business ,medicine.disease - Published
- 2019
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127. Alzheimer's Prevention Initiative Generation Program: Development of an APOE genetic counseling and disclosure process in the context of clinical trials
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Fonda Liu, Pierre N. Tariot, J. Scott Roberts, Angela R. Bradbury, Marie-Emmanuelle Riviere, Carolyn Langlois, Eric M. Reiman, Scott Y. H. Kim, Jessica B. Langbaum, Elisabeth M. Wood, and Jason Karlawish
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0301 basic medicine ,Apolipoprotein E ,Genetic counseling ,Context (language use) ,Disease ,Session (web analytics) ,Clinical research ,Generation Program ,03 medical and health sciences ,Clinical trials ,0302 clinical medicine ,medicine ,Genetic testing ,Operationalization ,medicine.diagnostic_test ,Prevention ,Featured Article ,Alzheimer's disease ,3. Good health ,Clinical trial ,Psychiatry and Mental health ,030104 developmental biology ,Genetic disclosure ,Alzheimer's Prevention Initiative ,ComputingMilieux_COMPUTERSANDSOCIETY ,Neurology (clinical) ,Psychology ,APOE ,030217 neurology & neurosurgery ,Clinical psychology - Abstract
Introduction As the number of Alzheimer's disease (AD) prevention studies grows, many individuals will need to learn their genetic and/or biomarker risk for the disease to determine trial eligibility. An alternative to traditional models of genetic counseling and disclosure is needed to provide comprehensive standardized counseling and disclosure of apolipoprotein E (APOE) results efficiently, safely, and effectively in the context of AD prevention trials. Methods A multidisciplinary Genetic Testing, Counseling, and Disclosure Committee was established and charged with operationalizing the Alzheimer's Prevention Initiative (API) Genetic Counseling and Disclosure Process for use in the API Generation Program trials. The objective was to provide consistent information to research participants before and during the APOE counseling and disclosure session using standardized educational and session materials. Results The Genetic Testing, Counseling, and Disclosure Committee created a process consisting of eight components: requirements of APOE testing and reports, psychological readiness assessment, determination of AD risk estimates, guidance for identifying providers of disclosure, predisclosure education, APOE counseling and disclosure session materials, APOE counseling and disclosure session flow, and assessing APOE disclosure impact. Discussion The API Genetic Counseling and Disclosure Process provides a framework for large-scale disclosure of APOE genotype results to study participants and serves as a model for disclosure of biomarker results. The process provides education to participants about the meaning and implication(s) of their APOE results while also incorporating a comprehensive assessment of disclosure impact. Data assessing participant safety and psychological well-being before and after APOE disclosure are still being collected and will be presented in a future publication., Highlights • Participants may need to learn their risk for Alzheimer's disease to enroll in studies. • Alternatives to traditional models of apolipoprotein E counseling and disclosure are needed. • An alternative process was developed by the Alzheimer's Prevention Initiative. • This process has been implemented by the Alzheimer's Prevention Initiative Generation Program.
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- 2019
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128. First Direct Measurement of an Astrophysical p-Process Reaction Cross Section Using a Radioactive Ion Beam
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A. Lennarz, Corina Andreoiu, G. Hackman, D. Walter, A. M. Amthor, M. Williams, Barry Davids, N. E. Esker, V. Bildstein, J. Williams, Thomas Rauscher, D. Yates, F. H. Garcia, W. N. Catford, B. Wallis, A. R. L. Kennington, A. B. Garnsworthy, S. A. Gillespie, S. S. Bhattacharjee, C. Paxman, C. R. Natzke, C. Burbadge, Gavin Lotay, Eva Kasanda, Martín Alcorta, H. Behnamian, R. S. Lubna, N. Nishimura, B. Olaizola, S. Jazrawi, G. C. Ball, D. T. Doherty, Y. H. Kim, K. A. Hudson, D. Baal, S. Hallam, A. Psaltis, and C. E. Svensson
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Physics ,Ion beam ,Projectile ,FOS: Physical sciences ,General Physics and Astronomy ,Kinetic energy ,01 natural sciences ,p-process ,3. Good health ,Core (optical fiber) ,Nuclear physics ,Cross section (physics) ,Supernova ,0103 physical sciences ,Nuclear Experiment (nucl-ex) ,010306 general physics ,Nuclear Experiment ,010303 astronomy & astrophysics ,Radioactive beam - Abstract
We have performed the first direct measurement of the 83Rb(p,g) radiative capture reaction cross section in inverse kinematics using a radioactive beam of 83Rb at incident energies of 2.4 and 2.7 A MeV. The measured cross section at an effective relative kinetic energy of Ecm = 2.393 MeV, which lies within the relevant energy window for core collapse supernovae, is smaller than the prediction of statistical model calculations. This leads to the abundance of 84Sr produced in the astrophysical p process being higher than previously calculated. Moreover, the discrepancy of the present data with theoretical predictions indicates that further experimental investigation of p-process reactions involving unstable projectiles is clearly warranted., 6 pages, 4 figures, published in Physical Review Letters
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- 2021
129. Low bleeding and stroke rates with minor age-dependent increase confirm the safety and effectiveness of edoxaban in patients with atrial fibrillation across age groups: Two-year results from ETNA-AF
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Ladislav Pecen, Cathy Chen, R. De Caterina, Doralisa Morrone, Leon Dinshaw, C.-C Wang, W Jiang, Yukihiro Koretsune, P.E. Reimitz, Takanori Yamashita, Y.-H Kim, Martin Unverdorben, and P Kirchhof
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Gastrointestinal bleeding ,medicine.medical_specialty ,business.industry ,Ischemia ,Atrial fibrillation ,medicine.disease ,chemistry.chemical_compound ,chemistry ,Age groups ,Edoxaban ,Physiology (medical) ,Heart failure ,Internal medicine ,medicine ,Cardiology ,In patient ,Cardiology and Cardiovascular Medicine ,business ,Stroke - Abstract
Funding Acknowledgements Type of funding sources: Private company. Main funding source(s): Daiichi Sankyo Background Age is a risk factor for ischemic stroke and bleeding in patients with atrial fibrillation (AF). The large dataset from the global prospective, noninterventional ETNA-AF program allows for analysis of the impact of age on clinical events in AF patients treated with edoxaban. Purpose Evaluate the safety and effectiveness of edoxaban by age subgroups and the impact of age on clinical events. Methods Baseline patient characteristics, thromboembolic and bleeding events, and mortality data were collected from patients with 2-year follow-up in ETNA-AF program and analyzed in defined age subgroups. Cox regression analysis was conducted using age as a continuous variable and clinical events as outcome variables. Results A total of 27,617 patients were categorized into four age subgroups: Conclusion Two-year follow-up data from the global ETNA-AF program support the use of edoxaban as a safe and effective treatment for AF patients across all age groups, including the very elderly, in routine clinical care. The impact of age on the risk of ICH was smaller than that of ischemic stroke and major bleeding.
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- 2021
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130. Annualized clinical event rates during two-year follow-up are low in 27,617 atrial fibrillation patients on edoxaban: results from the global noninterventional ETNA-AF program
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P.E. Reimitz, Takanori Yamashita, P Kirchhof, R. De Caterina, Doralisa Morrone, Yukihiro Koretsune, W Jiang, Martin Unverdorben, Ladislav Pecen, C.-C Wang, Cathy Chen, Y.-H Kim, and Leon Dinshaw
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medicine.medical_specialty ,Gastrointestinal bleeding ,business.industry ,Clinical events ,Intracranial Hemorrhages ,Atrial fibrillation ,medicine.disease ,chemistry.chemical_compound ,chemistry ,Edoxaban ,Physiology (medical) ,Stroke prevention ,Internal medicine ,Ischemic stroke ,CHA2DS2–VASc score ,Cardiology ,Medicine ,Cardiology and Cardiovascular Medicine ,business - Abstract
Funding Acknowledgements Type of funding sources: Private company. Main funding source(s): Daiichi Sankyo Background and Purpose The large global Edoxaban Treatment in routiNe clinical prActice (ETNA)-AF program was designed to assess the safety and effectiveness of edoxaban, complementing randomized clinical trials. Methods ETNA collects data on patient characteristics and clinical events in unselected AF patients treated with edoxaban for stroke prevention, integrating data from prospective, noninterventional studies conducted in Europe, Japan, South Korea, and Taiwan. Results The 2-year follow-up analysis included 27,617 patients, the majority of whom (82.6%) received the recommended dose according to the local label. At baseline, the mean age was 73.6 ± 9.8 years and 58.1% were male. Half of the patients (50.5%) were 75 years or older. The CHA2DS2-VASc score was 3.3 ± 1.5, and the modified HAS-BLED score was 2.4 ± 1.1. The rate of ischemic stroke was 0.74%/yr, major bleeding 1.02%/yr, intracranial hemorrhage 0.29%/yr, and major gastrointestinal (GI) bleeding 0.51%/yr. All-cause mortality was 3.13%/yr, and cardiovascular (CV) mortality 1.45%/yr (see Table). Conclusion The rates of ischemic stroke and major bleeding events remained low globally and across regions during the two-year follow-up period in AF patients treated with edoxaban. Global(N = 27,617) Japan(N = 11,330) Korea/Taiwan(N = 2,870) Europe(N = 13,417) Age, mean (SD) 73.6 (9.8) 74.2 (10.1) 71.6 (9.5) 73.6 (9.5) Gender, male, % 58.1 59.4 60.2 56.6 Weight [kg], median (IQR) 69 (58, 81) 59 (51, 68) 65 (57, 73) 80 (70, 90) CrCL [mL/min], mean (SD) 68.7 (28.4) 63.9 (25.8) 63.4 (23.7) 74.4 (30.5) CHA2DS2-VASc, mean (SD) 3.3 (1.5) 3.5 (1.7) 3.1 (1.4) 3.2 (1.4) Mod. HAS-BLED≠, mean (SD) 2.4 (1.1) 2.4 (1.1) 2.3 (1.1) 2.5 (1.1) Edoxaban 60mg/30mg, % 53.5 / 46.5 27.6 / 72.4 48.8 / 51.2 76.4 / 23.6 2-year clinical events, N (%/year), [95% CI] Major Bleeding (ISTH) 477 (1.02) [0.93; 1.11] 188 (1.09) [0.94; 1.25] 51 (1.00) [0.74; 1.31] 238 (0.97) [0.85; 1.11] Intracranial Hemorrhage 135 (0.29) [0.24; 0.34] 68 (0.39) [0.30; 0.50] 17 (0.33) [0.19; 0.53] 50 (0.20) [0.15; 0.27] Major GI Bleeding 241 (0.51) [0.45; 0.58] 122 (0.70) [0.58; 0.84] 18 (0.35) [0.21; 0.55] 101 (0.41) [0.33; 0.50] Any Stroke 455 (0.97) [0.88; 1.06] 244 (1.41) [1.24; 1.60] 54 (1.06) [0.80; 1.38] 157 (0.64) [0.54; 0.75] Ischemic Stroke 347 (0.74) [0.66; 0.82] 179 (1.03) [0.89; 1.20] 43 (0.84) [0.61; 1.13] 125 (0.51) [0.42; 0.61] Hemorrhagic Stroke 99 (0.21) [0.17; 0.26] 67 (0.39) [0.30; 0.49] 9 (0.17) [0.08; 0.33] 23 (0.09) [0.06; 0.14] All-cause Death 1479 (3.13) [2.98; 3.30] 470 (2.70) [2.46; 2.96] 72 (1.40) [1.09; 1.76] 937 (3.80) [3.56; 4.05] CV Death 684 (1.45) [1.34; 1.56] 140 (0.80) [0.68; 0.95] 26 (0.50) [0.33; 0.74] 518 (2.10) [1.92; 2.29] ≠Excluding labile INR.
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- 2021
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131. Artificial intelligence-predicted poor responders to catheter ablation for atrial fibrillation
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Y H Kim, Ji Choi, Tae Hoon Kim, OS Kwon, Hui Nam Pak, Jaemin Shim, Moon Hyoung Lee, Hee Tae Yu, Jae Sun Uhm, Jy. Kim, Boyoung Joung, and Je Wook Park
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Poor responder ,Atrial fibrillation ,Catheter ablation ,Cardiac Ablation ,medicine.disease ,Physiology (medical) ,Internal medicine ,CHA2DS2–VASc score ,Cardiology ,medicine ,Sinus rhythm ,PR interval ,Cardiology and Cardiovascular Medicine ,business ,Anti-Arrhythmia Agents - Abstract
Funding Acknowledgements Type of funding sources: None. Introduction Although atrial fibrillation (AF) catheter ablation is effective for rhythm control, in some patients it is hard to maintain sinus rhythm in spite of repeated AF catheter ablation (AFCA) procedures and anti-arrhythmic drugs (AADs). We explored the pre-procedural predictors for poor responders to AFCA and tested whether artificial intelligence (AI) assists the prediction of poor responders in the independent cohort by determining the invasive parameters. Methods Among 1,214 patients who underwent AFCA and regular rhythm follow-up for 56.2 ± 33.8 months (59 ± 11 years, 73.5% male, 68.6% paroxysmal AF), we differentiated 92 poor responders defined as those with sustained AF despite repeat AFCAs, AADs, or electrical cardioversion. Using the Youden index, we identified advanced LA remodeling with lower LA voltage under 1.109mV. AI model, which was derived from development cohort using medical record, was applied to predict LA voltage Results The patients with lower LA voltage under 1.109mV showed significantly poorer rhythm outcomes (Log-rank p Conclusions The patients with advanced atrial remodeling with low LA voltage, which can be predicted by an AI, showed significantly higher recurrence of AF after AFCA with AADs or cardioversion. AI may assist to select these poor responder patients before the AFCA procedure. Abstract Figure.
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- 2021
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132. Accessing tens-to-hundreds femtoseconds nuclear state lifetimes with low-energy binary heavy-ion reactions
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M. Zieblinski, J. Grebosz, K. Mazurek, Simone Coelli, S. Brambilla, H. J. Li, B. Million, M. Rejmund, Bertrand Jacquot, P. Bednarczyk, N. Cieplicka-Oryńczak, M. Ciemala, M. Bast, S. Ziliani, O. Dorvaux, S. Erturk, Eric Clément, Ł. W. Iskra, C. Fransen, S. M. Lenzi, B. Fornal, P. J. Napiorkowski, C. Müller-Gatermann, M. Zielińska, B. Wasilewska, I. Matea, A. Maj, M. Kmiecik, Y. H. Kim, M. Kicińska-Habior, C. Michelagnoli, I. Stefan, M. Beckers, F. C. L. Crespi, O. Wieland, M. Lewitowicz, R. Palit, D. R. Napoli, Ch. Schmitt, A. V. Karpov, M. Stanoiu, F. Camera, Emanuele Vardaci, M. Matejska-Minda, A. Bracco, G. Benzoni, S. Bottoni, S. Leoni, V. Nanal, C. Boiano, A. Lemasson, Mohsen Harakeh, Thomas Braunroth, A. Goldkuhle, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Ciemala, M., Ziliani, S., Crespi, F. C. L., Leoni, S., Fornal, B., Maj, A., Bednarczyk, P., Benzoni, G., Bracco, A., Boiano, C., Bottoni, S., Brambilla, S., Bast, M., Beckers, M., Braunroth, T., Camera, F., Cieplicka-Orynczak, N., Clement, E., Coelli, S., Dorvaux, O., Erturk, S., De France, G., Fransen, C., Goldkuhle, A., Grebosz, J., Harakeh, M. N., Iskra, L. W., Jacquot, B., Karpov, A., Kicinska-Habior, M., Kim, Y. -H., Kmiecik, M., Lemasson, A., Lenzi, S. M., Lewitowicz, M., Li, H., Matea, I., Mazurek, K., Michelagnoli, C., Matejska-Minda, M., Million, B., Muller-Gatermann, C., Nanal, V., Napiorkowski, P., Napoli, D. R., Palit, R., Rejmund, M., Schmitt, C., Stanoiu, M., Stefan, I., Vardaci, E., Wasilewska, B., Wieland, O., Zieblinski, M., Zielinska, M., H. Niewodniczanski Institute of Nuclear Physics, Polska Akademia Nauk = Polish Academy of Sciences (PAN), Dipartimento di Fisica (Milano), Università degli Studi di Milano [Milano] (UNIMI), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), Istituto Nazionale di Fisica Nucleare (INFN), Institut für Kernphysik der Universität zu Köln, Universität zu Köln, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano = University of Milan (UNIMI), Universität zu Köln = University of Cologne, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Nuclear Energy
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Nuclear reaction ,Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,Monte Carlo method ,Hadron ,FOS: Physical sciences ,Binary number ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,01 natural sciences ,Excited state ,0103 physical sciences ,Nuclear fusion ,AGATA ,Nuclear Experiment (nucl-ex) ,Connection (algebraic framework) ,Atomic physics ,Nuclear Experiment ,010306 general physics - Abstract
A novel Monte Carlo technique has been developed to determine lifetimes of excited states in the tens-to-hundreds femtoseconds range in products of low-energy heavy-ion binary reactions, with complex velocity distributions. The method is based on a detailed study of Doppler-broadened $$\gamma $$ γ -ray lineshapes. Its relevance is demonstrated in connection with the $$^{18}\text {O}(7.0\, \text {MeV/u})+\,^{181}\text {Ta}$$ 18 O ( 7.0 MeV/u ) + 181 Ta experiment, performed at GANIL with the AGATA+VAMOS+PARIS setup, to study neutron-rich O, C, N, ... nuclei. Excited states in $$^{17}\text {O}$$ 17 O and $$^{19}\text {O}$$ 19 O , with known lifetimes, are used to validate the method over the $$\sim 20{-}400\,\text {fs}$$ ∼ 20 - 400 fs lifetime-sensitivity range. Emphasis is given to the unprecedented position resolution provided by $$\gamma $$ γ -tracking arrays, which turns out to be essential for reaching the required accuracy in Doppler-shift correction. The technique is anticipated to be an important tool for lifetime investigations in exotic neutron-rich nuclei, produced with intense ISOL-type beams.
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- 2021
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133. Parental Enrollment Decision-Making for a Neonatal Clinical Trial
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Joern-Hendrik Weitkamp, Scott Y. H. Kim, Brenda J. Stanley, Erin M. Havrilla, Uchenna E. Anani, Juanita Dudley, Carrie B. Torr, Sandra E. Juul, Rakesh Rao, David Riley, Alexandra C. O’Kane, David G. Russell, Amit M. Mathur, Elliott Mark Weiss, Ellen M. Bendel-Stenzel, Brooke E. Magnus, Krystle Perez, Benjamin S. Wilfond, Aleksandra E. Olszewski, Zeynep N. Inanc Salih, Kaashif A. Ahmad, Anita R. Shah, Yvonne W. Wu, Natalia Isaza, Seema K. Shah, John Flibotte, Katherine Guttmann, Sijia Li, Andrea L. Lampland, and Taeun Chang
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Asphyxia ,Clinical team ,Parents ,medicine.medical_specialty ,business.industry ,Patient Selection ,Decision Making ,Infant, Newborn ,Infant ,Decisional conflict ,Article ,Clinical trial ,Cross-Sectional Studies ,Family medicine ,Intensive care ,Intensive Care Units, Neonatal ,Surveys and Questionnaires ,Pediatrics, Perinatology and Child Health ,medicine ,Humans ,medicine.symptom ,business ,Randomized Controlled Trials as Topic - Abstract
To describe the parental experience of recruitment and assess differences between parents who participated and those who declined to enroll in a neonatal clinical trial.This was a survey conducted at 12 US neonatal intensive care units of parents of infants who enrolled in the High-dose Erythropoietin for Asphyxia and encephaLopathy (HEAL) trial or who were eligible but declined enrollment. Questions assessed 6 factors of the parental experience of recruitment: (1) interactions with research staff; (2) the consent experience; (3) perceptions of the study; (4) decisional conflict; (5) reasons for/against participation; and (6) timing of making the enrollment decision.In total, 269 of 387 eligible parents, including 183 of 242 (75.6%) of those who enrolled their children in HEAL and 86 of 145 (59.3%) parents who declined to enroll their children in HEAL, were included in analysis. Parents who declined to enroll more preferred to be approached by clinical team members rather than by research team members (72.9% vs 49.2%, P = .005). Enrolled parents more frequently reported positive initial impressions (54.9% vs 10.5%, P .001). Many parents in both groups made their decision early in the recruitment process. Considerations of reasons for/against participation differed by enrollment status.Understanding how parents experience recruitment, and how this differs by enrollment status, may help researchers improve recruitment processes for families and increase enrollment. The parental experience of recruitment varied by enrollment status. These findings can guide future work aiming to inform optimal recruitment strategies for neonatal clinical trials.
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- 2021
134. Editorial: Human Rights and Mental Health: Current Developments in Competence Assessment and Supported Decision-Making
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Scott Y. H. Kim, Jochen Vollmann, Matthé Scholten, and Penelope June Weller
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Psychiatry ,mental health care ,Human rights ,supported decision-making ,media_common.quotation_subject ,informed consent ,RC435-571 ,mental capacity ,Mental health ,Psychiatry and Mental health ,Editorial ,Nursing ,Informed consent ,Mental capacity ,Mental health care ,UN-CRPD ,Competence assessment ,competence to consent ,substitute decision-making ,Psychology ,media_common - Published
- 2021
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135. Ways of Debating Assisted Suicide and Euthanasia: Implications for Psychiatry
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Scott Y. H. Kim
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Psychiatry ,medicine.medical_specialty ,Scope (project management) ,Euthanasia ,Health Policy ,media_common.quotation_subject ,Context (language use) ,General Medicine ,Suicide, Assisted ,Issues, ethics and legal aspects ,History and Philosophy of Science ,Physicians ,medicine ,Humans ,Sociology ,Assisted suicide ,Autonomy ,Prerogative ,media_common ,Netherlands - Abstract
Euthanasia or assisted suicide (EAS) is permitted in a handful of jurisdictions. But its scope (ranging from being restricted to the end of life to no restrictions save those of autonomy) and its legal basis (ranging from a necessary prerogative of physicians to a human right) vary greatly. The debate over psychiatric EAS (pEAS) needs to be understood within this complex context. This essay addresses one specific aspect: can pEAS be grounded on a basic human right? The author argues against pEAS as grounded on a basic human right by showing that such a view has several implications we ought not accept.
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- 2021
136. Thin-Slice Pituitary MRI with Deep Learning-Based Reconstruction for Preoperative Prediction of Cavernous Sinus Invasion by Pituitary Adenoma: A Prospective Study
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M. Kim, H.S. Kim, J.E. Park, S.Y. Park, Y.-H. Kim, S.J. Kim, J. Lee, and M.R. Lebel
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Deep Learning ,Humans ,Radiology, Nuclear Medicine and imaging ,Cavernous Sinus ,Female ,Neoplasm Invasiveness ,Pituitary Neoplasms ,Neurology (clinical) ,Prospective Studies ,Middle Aged ,Magnetic Resonance Imaging ,Head & Neck - Abstract
BACKGROUND AND PURPOSE: Accurate radiologic prediction of cavernous sinus invasion by pituitary adenoma remains challenging. We aimed to assess whether 1-mm-slice-thickness MRI with deep learning–based reconstruction can better predict cavernous sinus invasion by pituitary adenoma preoperatively and to estimate the depth of invasion and degree of contact in relation to the carotid artery, compared with 3-mm-slice-thickness MRI. MATERIALS AND METHODS: This single-institution, prospective study included 67 consecutive patients (mean age, 53 [SD, 12] years; 28 women), between January and August 2020, who underwent a combined contrast-enhanced T1-weighted imaging protocol of 1-mm-slice-thickness MRI + deep learning–based reconstruction and 3-mm-slice-thickness MRI. An expert neuroradiologist who was blinded to the imaging protocol determined cavernous sinus invasion using the modified Knosp classification on 1-mm-slice-thickness MRI + deep learning–based reconstruction and 3-mm-slice-thickness MRI, respectively. Reference standards were established by the consensus of radiologic, intraoperative, pathologic, and laboratory findings. The primary end point was the diagnostic performance of each imaging protocol, and the secondary end points included depth of invasion and degree of contact in relation to the carotid artery. RESULTS: The diagnostic performance of 1-mm-slice-thickness MRI + deep learning–based reconstruction (area under the curve, 0.79; 95% CI, 0.69 − 0.89) in predicting cavernous sinus invasion by pituitary adenoma was higher than that of 3-mm-slice-thickness MRI (area under the curve, 0.61; 95% CI, 0.52–0.70; P 270°, 38.8% versus 16.4%, P
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- 2021
137. Applying decision-making capacity criteria in practice: A content analysis of court judgments
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Scott Y H Kim, Nuala Kane, Gareth Owen, and Alex Ruck Keene
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Value (ethics) ,Male ,Eating Disorders ,Applied psychology ,Social Sciences ,0302 clinical medicine ,Cognition ,Medical Conditions ,Sociology ,Intellectual disability ,Medicine and Health Sciences ,Psychology ,Mental Competency ,030212 general & internal medicine ,Reliability (statistics) ,Cognitive Impairment ,Multidisciplinary ,Cognitive Neurology ,Middle Aged ,16. Peace & justice ,Preference ,Neurology ,Medicine ,Female ,Research Article ,Typology ,Adult ,Adolescent ,Science ,Cognitive Neuroscience ,Disabilities ,Decision Making ,Appeal ,03 medical and health sciences ,Judgment ,Young Adult ,Intellectual Disability ,Mental Health and Psychiatry ,medicine ,Humans ,Aged ,Cognitive Psychology ,Biology and Life Sciences ,Psychoses ,Reasoning ,medicine.disease ,Transparency (behavior) ,Communications ,030227 psychiatry ,Content analysis ,Cognitive Science ,Dementia ,Neuroscience - Abstract
Background/Objectives Many jurisdictions use a functional model of capacity with similar legal criteria, but there is a lack of agreed understanding as to how to apply these criteria in practice. We aimed to develop a typology of capacity rationales to describe court practice in making capacity determinations and to guide professionals approaching capacity assessments. Methods We analysed all published cases from courts in England and Wales [Court of Protection (CoP) judgments, or Court of Appeal cases from the CoP] containing rationales for incapacity or intact capacity(n = 131). Qualitative content analysis was used to develop a typology of capacity rationales or abilities. Relationships between the typology and legal criteria for capacity [Mental Capacity Act (MCA)] and diagnoses were analysed. Results The typology had nine categories (reliability: kappa = 0.63): 1) to grasp information or concepts, 2) to imagine/ abstract, 3) to remember, 4) to appreciate, 5) to value/ care, 6) to think through the decision non-impulsively, 7) to reason, 8) to give coherent reasons, and 9) to express a stable preference. Rationales most frequently linked to MCA criterion ‘understand’ were ability to grasp information or concepts (43%) or to appreciate (42%), and to MCA criterion ‘use or weigh’ were abilities to appreciate (45%) or to reason (32%). Appreciation was the most frequently cited rationale across all diagnoses. Judges often used rationales without linking them specifically to any MCA criteria (42%). Conclusions A new typology of rationales could bridge the gap between legal criteria for decision-making capacity and phenomena encountered in practice, increase reliability and transparency of assessments, and provide targets for decision-making support.
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- 2021
138. Molecular insights into the development of hepatic metastases in colorectal cancer: a metastasis prediction study
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J, Yang, H, Kim, K, Shin, Y, Nam, H J, Heo, G H, Kim, B-Y, Hwang, J, Kim, S, Woo, H S, Choi, D S, Ko, D, Lee, and Y H, Kim
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Area Under Curve ,Liver Neoplasms ,Multivariate Analysis ,Humans ,Kaplan-Meier Estimate ,Colorectal Neoplasms ,Prognosis ,Survival Analysis - Abstract
Colorectal cancer is presently the third most commonly diagnosed cancer in the United States. In this study, we identified molecular differences between hepatic and non-hepatic metastases in colorectal cancer and evaluated their prognostic significance.We downloaded primary data from the NCBI Gene Expression Omnibus (GSE6988, GSE62321, GSE50760, and GSE28722). To identify the molecular differences, we used the Significance Analysis of Microarray method. We selected nine prognostic genes (SYTL2, PTPLAD1, CDS1, RNF138, PIGR, WDR78, MYO7B, TSPAN3, and ATP5F1) with hepatic metastasis prediction score in colorectal cancer (hereafter referred to as LASSO Score). We confirmed the prognostic significance of the LASSO Score by using Kaplan-Meier survival analysis, multivariate analysis, the time-dependent area under the curve (AUC) of Uno's C-index, and the AUC of the receiver operating characteristic curve at 1-5 years.Survival analysis revealed that a high LASSO Score is associated with a poor prognosis in colorectal cancer patients with hepatic metastases (p = 0). Analysis of C-indices and AUC values from the receiver operating characteristic curve further supported this prediction by the LASSO Score. Multivariate analysis confirmed the prognostic significance of the LASSO Score (p = 1.13e-06).This study reveals the biological mechanisms underlying hepatic metastases in colorectal cancer and will help in developing targeted therapies for colorectal cancer.
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- 2020
139. Meteor radar observations of vertically propagating low-frequency inertia-gravity waves near the southern polar mesopause region
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I.-S. Song, C. Lee, J.-H. Kim, G. Jee, Y.-H. Kim, H.-J. Choi, H.-Y. Chun, and Y. H. Kim
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010504 meteorology & atmospheric sciences ,Gravitational wave ,media_common.quotation_subject ,Geophysics ,Meteor radar ,Low frequency ,Inertia ,01 natural sciences ,Space and Planetary Science ,0103 physical sciences ,Mesopause ,Polar ,010303 astronomy & astrophysics ,Geology ,0105 earth and related environmental sciences ,media_common - Published
- 2017
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140. How important is 'accuracy' of surrogate decision-making for research participation?
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Scott Y H Kim, H Myra Kim, Kerry A Ryan, Paul S Appelbaum, David S Knopman, Laura Damschroder, and Raymond De Vries
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Medicine ,Science - Abstract
BackgroundThere is a longstanding concern about the accuracy of surrogate consent in representing the health care and research preferences of those who lose their ability to decide for themselves. We sought informed, deliberative views of the older general public (≥50 years old) regarding their willingness to participate in dementia research and to grant leeway to future surrogates to choose an option contrary to their stated wishes.Methodology/principal findings503 persons aged 50+ recruited by random digit dialing were randomly assigned to one of three groups: deliberation, education, or control. The deliberation group attended an all-day education/peer deliberation session; the education group received written information only. Participants were surveyed at baseline, after the deliberation session (or equivalent time), and one month after the session, regarding their willingness to participate in dementia research and to give leeway to surrogates, regarding studies of varying risk-benefit profiles (a lumbar puncture study, a drug randomized controlled trial, a vaccine randomized controlled trial, and an early phase gene transfer trial). At baseline, 48% (gene transfer scenario) to 92% (drug RCT) were willing to participate in future dementia research. A majority of respondents (57-71% depending on scenario) were willing to give leeway to future surrogate decision-makers. Democratic deliberation increased willingness to participate in all scenarios, to grant leeway in 3 of 4 scenarios (lumbar puncture, vaccine, and gene transfer), and to enroll loved ones in research in all scenarios. On average, respondents were more willing to volunteer themselves for research than to enroll their loved ones.Conclusions/significanceMost people were willing to grant leeway to their surrogates, and this willingness was either sustained or increased after democratic deliberation, suggesting that the attitude toward leeway is a reliable opinion. Eliciting a person's current preferences about future research participation should also involve eliciting his or her leeway preferences.
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- 2013
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141. Anti-inflammatory effects of Stephania tetrandra S. Moore on interleukin-6 production and experimental inflammatory disease models
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H-S. Kang, Y-H. Kim, C-S. Lee, J-J. Lee, I. Choi, and K-H. Pyun
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Pathology ,RB1-214 - Abstract
Deregulation of interleukin-6 (IL-6) expression caused the synthesis and release of many inflammatory mediators. It is involved in chronic inflammation, autoimmune diseases, and malignancy. Stephania tetrandra S. Moore is a Chinese medicinal herb which has been used traditionary as a remedy for neuralgia and arthritis in China. To investigate the anti-inflammatory effects of S. tetrandra S. Moore in vitro and in vivo, its effects on the production of IL-6 and inflammatory mediators were analysed. When human monocytes/macrophages stimulated with silica were treated with 0.1–10 μg/ml S. tetranda S. Moore, the production of IL-6 was inhibited up to 50%. At these concentrations, it had no cytotoxicity effect on these cells. It also suppressed the production of IL-6 by alveolar macrophages stimulated with silica. In addition, it inhibited the release of superoxide anion and hydrogen peroxide from human monocytes/macrophages. To assess the anti-fibrosis effects of S. tetrandra S. Moore, its effects on in vivo experimental inflammatory models were evaluated. In the experimental silicosis model, IL-6 activities in the sera and in the culture supernatants of pulmonary fibroblasts were also inhibited by it. In vitro and in vivo treatment of S. tetrandra S. Moore reduced collagen production by rat lung fibroblasts and lung tissue. Also, S. tetrandra S. Moore reduced the levels of serum GOT and GPT in the rat cirrhosis model induced by CCL4, and it was effective in reducing hepatic fibrosis and nodular formation. Taken together, these data indicate that it has a potent anti-inflammatory and antifibrosis effect by reducing IL-6 production.
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- 1996
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142. Leucrose, a natural sucrose isomer, suppresses dextran sulfate sodium (DSS)-induced colitis in mice by regulating macrophage polarization via JAK1/STAT6 signaling
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Y.-H. Kim, Yuri Kim, Pu Reum Seok, Eunju Kim, Jae Ho Shin, Sang-Ho Yoo, and Jihye Lee
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0301 basic medicine ,Macrophage polarization ,Medicine (miscellaneous) ,Inflammation ,Pharmacology ,RAW 264.7 cell ,Proinflammatory cytokine ,Leucrose ,03 medical and health sciences ,0404 agricultural biotechnology ,In vivo ,JAK1/STAT6 ,medicine ,TX341-641 ,Colitis ,DSS-induced colitis ,STAT6 ,030109 nutrition & dietetics ,Nutrition and Dietetics ,biology ,Chemistry ,Nutrition. Foods and food supply ,04 agricultural and veterinary sciences ,medicine.disease ,M2 Macrophage ,040401 food science ,Myeloperoxidase ,biology.protein ,medicine.symptom ,M2 macrophage polarization ,Food Science - Abstract
The purpose of the present study was to investigate the anti-inflammatory effects of a sugar isomer, leucrose (D-glucopyranosyl-α-(1–5)-D-fructopyranose) in a dextran sulfate sodium (DSS)-induced colitis mouse model and in RAW 264.7 macrophages. Colitis was induced in vivo with administration of two cycles of DSS (2.5%). Two groups of mice received an AIN-93G diet with 25% or 50% of the total sucrose content replaced with leucrose. This leucrose supplementation improved disease activity index (DAI) scores, colon length, histopathological damage, and myeloperoxidase (MPO) activity levels. In addition, the expression of pro-inflammatory mediators and cytokines decreased in the leucrose supplementation groups compared with the DSS alone treatment group. Furthermore, leucrose supplementation increased M2 macrophage polarization. Leucrose treatment suppressed IL-4-induced M2 polarization and increased JAK1/STAT6 phosphorylation in RAW264.7 cells. Taken together, these results indicate that leucrose exerts an anti-inflammatory effect by regulating M2 macrophage polarization via inflammatory cytokines and the JAK1/STAT6 signaling pathway.
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- 2020
143. Edoxaban treatment of elderly patients with atrial fibrillation in routine clinical practice: 1-year results of the non-interventional Global ETNA-AF program
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R. De Caterina, C.-C Wang, P.E. Reimitz, Martin Unverdorben, Y.-H Kim, Paulus Kirchhof, Cathy Chen, Takanori Yamashita, and Yukihiro Koretsune
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chemistry.chemical_compound ,medicine.medical_specialty ,chemistry ,business.industry ,Edoxaban ,Non interventional ,Emergency medicine ,Medicine ,Atrial fibrillation ,Routine clinical practice ,Cardiology and Cardiovascular Medicine ,business ,medicine.disease - Abstract
Background The prevalence of atrial fibrillation (AF) and the need for appropriate anticoagulation increase with age. The benefit/risk profile of direct oral anticoagulants such as edoxaban in elderly population with AF in regular clinical practice is therefore of particular interest. Purpose Analyses of Global ETNA-AF data were performed to report patient characteristics, edoxaban treatment, and 1-year clinical events by age subgroups. Methods Global ETNA-AF is a multicentre, prospective, noninterventional program conducted in Europe, Japan, Korea, Taiwan, and other Asian countries. Demographics, baseline characteristics, and 1-year clinical event data were analysed in four age subgroups. Results Of 26,823 patients included in this analysis, 50.4% were ≥75 years old and 11.6% were ≥85 years. Increase in age was generally associated with lower body weight, lower creatinine clearance, higher CHA2DS2-VASc and HAS-BLED scores, and a higher percentage of patients receiving the reduced dose of 30 mg daily edoxaban. At 1-year, rates of ISTH major bleeding and ischaemic stroke were generally low across all age subgroups. The proportion of intracranial haemorrhage within major bleeding events was similar across age groups. All-cause mortality increased with age more than cardiovascular mortality. Conclusion Data from Global ETNA-AF support the safety and effectiveness of edoxaban in elderly AF patients (including ≥85 years) in routine clinical care with only a small increase in intracranial haemorrhage. The higher all-cause mortality with increasing age is not driven by cardiovascular causes. Funding Acknowledgement Type of funding source: Private company. Main funding source(s): Daiichi Sankyo
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- 2020
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144. Electrical posterior box isolation in persistent atrial fibrillation changed to paroxysmal atrial fibrillation: a multi-center, prospective, randomized study
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Y H Kim, Jae Sun Uhm, Hui Nam Pak, Boyoung Joung, M H Lee, Junbeom Park, Hee Tae Yu, Jaemin Shim, and Tae Hoon Kim
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medicine.medical_specialty ,Paroxysmal atrial fibrillation ,business.industry ,medicine.medical_treatment ,Pulmonary vein ablation ,Electric countershock ,Ablation ,Internal medicine ,Persistent atrial fibrillation ,medicine ,Cardiology ,Sinus rhythm ,Prospective randomized study ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,Atrial tachycardia - Abstract
Background Persistent atrial fibrillation (PeAF) can change to paroxysmal AF (PAF) after antiarrhythmic drug medication and cardioversion. Purpose We investigated whether electrical posterior box isolation (POBI) may improve rhythm outcome of catheter ablation in those patient group. Methods We prospectively randomized 114 patients with PeAF to PAF (male 75%, 59.8±9.9 years old) to circumferential pulmonary vein isolation (CPVI) alone group (n=57) and additional POBI group (n=57). The primary end-point was AF recurrence after a single procedure, and the secondary end-point was a recurrence pattern, cardioversion rate, and the response to antiarrhythmic drugs (AADs). Results After a mean follow-up of 22.5±9.4 months, the clinical recurrence rate did not significantly differ between the two groups (29.8% vs. 28.1%, p=0.836; log rank p=0.815) The recurrence rate for atrial tachycardias (17.6% vs. 43.8%, p=0.141) was higher in POBI group, but the cardioversion rates (13.5% vs. 8.5%, p=0.434) were not significantly different between two groups. At the final follow-up, sinus rhythm was maintained without antiarrhythmic drug in 52.6% in CPVI group and 59.7% of POBI group (p=0.452). No significant difference was found in the major complication rates between the two groups (5.3% vs. 1.8%, p=0.618), but the total ablation time was significantly longer in the POBI group (4397±842 sec vs. 5337±1517 sec, p Conclusion In patients with persistent AF converted to paroxysmal AF by AAD, the addition of POBI to CPVI did not improve the rhythm outcome of catheter ablation nor influence overall safety. Funding Acknowledgement Type of funding source: None
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- 2020
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145. High-spin states above the isomers in neutron-rich iodine nuclei near N=82
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R. Banik, S. Bhattacharyya, M. Rejmund, A. Lemasson, S. Biswas, A. Navin, Y. H. Kim, C. Michelagnoli, I. Stefan, P. Bednarczyk, Soumik Bhattacharya, E. Clément, H. L. Crawford, G. de France, P. Fallon, G. Frémont, J. Goupil, B. Jacquot, H. J. Li, J. Ljungvall, A. Maj, L. Ménager, V. Morel, G. Mukherjee, R. Palit, R. M. Pérez-Vidal, J. Ropert, C. Schmitt, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)
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[PHYS]Physics [physics] ,Physics ,[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] ,Spin states ,Isotope ,010308 nuclear & particles physics ,Fission ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,01 natural sciences ,Excited state ,0103 physical sciences ,Neutron ,AGATA ,Atomic physics ,010306 general physics ,Spin (physics) ,Spectroscopy ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience; Excited states of neutron rich Iodine isotopes 130−134 I above the high spin isomers have been identified using prompt-delayed γ-ray spectroscopy. The Iodine isotopes have been produced as fission fragments of fusion-fission and transfer induced fission of 9 Be(238 U, f) at a beam energy of 6.2 MeV/u. The complete (A, Z) identification was obtained using the large acceptance magnetic spectrometer VAMOS++. The AGATA γ-ray tracking array was used to detect the prompt γ rays while the delayed γ rays (in the time range of 100 ns to 200 µs) from the isomeric states were identified by the EXOGAM segmented Clover detectors, placed behind the focal plane of VAMOS++ spectrometer. The high spin states above the (8 −) isomers in 130,132 I have been populated for the first time and a new isomer in 132 I has been identified. New γ-ray transition has also been assigned to the level structure of 134 I. Prompt transitions above the 19/2 − isomer have been identified in 131,133 I, for the first time. The level structures are interpreted in terms of the systematics of odd-Z nuclei above Z = 50 shell closure and large scale shell model calculations.
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- 2020
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146. Comparative Effectiveness Research, Learning Health Systems, and Pragmatic Randomized Controlled Trials
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Scott Y. H. Kim
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Standard of care ,Randomized controlled trial ,Nursing ,Informed consent ,law ,Comparative effectiveness research ,Real world evidence ,Psychology ,Pragmatic trial ,Healthcare system ,law.invention - Abstract
Pragmatic clinical trials (PCTs) comparing interventions “within the standard of care” can efficiently yield important real-world evidence for healthcare practice and policymaking. But since PCTs attempt to mimic real-world procedures, any requirements added to the PCTs—even ethical requirements such as informed consent—can compromise the pragmatic nature of the trials. Many therefore treat such PCTs as ethically exceptional and propose that if PCTs compare two standard interventions, by that mere fact they pose no more than minimal risk—making them candidates for waivers of informed consent. This chapter argues that such an approach misunderstands research risks, is dangerous, and is unnecessary. Using a rigorous research analysis model, the chapter argues that instead of discarding the research–treatment distinction, it is better to pragmatically integrate research and clinical ethics.
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- 2020
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147. Proton wires mediate the optical signal for ArcLight-type Genetically Encoded Voltage Indicators
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William N. Ross, Bok Eum Kang, Y. H. Kim, Lee Min Leong, Bradley J. Baker, and Kenichi Miyazaki
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Proton ,Chemistry ,Voltage clamp ,Biophysics ,Chromophore ,Electrostatics ,Signal ,Fluorescence ,Excitation ,Fluorescence spectroscopy - Abstract
The genetically encoded voltage indicators, ArcLight and its derivatives, mediate voltage dependent optical signals by intermolecular, electrostatic interactions between neighboring fluorescent proteins (FPs) via proton wires. A random mutagenesis event placed a negative charge on the exterior of the FP resulting in a greater than 10-fold improvement of the voltage-dependent optical signal. Repositioning this negative charge on the exterior of the FP reversed the polarity of voltage-dependent optical signals suggesting the presence of ‘hot spots’ capable of interacting with the negative charge on a neighboring FP thereby changing the fluorescent output. To explore the potential effect on the chromophore state, voltage-clamp fluorometry was performed with alternating excitation at 390 nm followed by excitation at 470 nm resulting in several mutants exhibiting voltage-dependent, ratiometric optical signals of opposing polarities. However, the kinetics, voltage ranges, and optimal FP fusion sites were different depending on the wavelength of excitation. These results suggest that the FP has external, electrostatic pathways capable of quenching fluorescence that are wavelength specific. ArcLight-derived GEVIs may therefore offer a novel way to map how conditions external to the β-can structure can affect the fluorescence of the chromophore and transiently manipulate those pathways via conformational changes mediated by whole cell voltage clamp.Statement of SignificanceArcLight-type GEVIs utilize proton pathways that send charge information outside of the FP to the internal chromophore enabling voltage induced conformational changes to affect fluorescence. These pathways are excitation wavelength specific suggesting that different external positions affect the protonated and deprotonated states of the chromophore.
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- 2020
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148. Mechanism of ArcLight derived GEVIs involves electrostatic interactions that can affect proton wires
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Y. H. Kim, Bok Eum Kang, Bradley J. Baker, Kenichi Miyazaki, Lee Min Leong, and William N. Ross
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Membrane potential ,0303 health sciences ,Chemistry ,Intermolecular force ,Static Electricity ,Biophysics ,Chromophore ,Electrostatics ,Fluorescence ,Fluorescence spectroscopy ,Membrane Potentials ,03 medical and health sciences ,Luminescent Proteins ,0302 clinical medicine ,HEK293 Cells ,Excited state ,Humans ,Protons ,030217 neurology & neurosurgery ,Excitation ,030304 developmental biology - Abstract
The genetically encoded voltage indicators ArcLight and its derivatives mediate voltage-dependent optical signals by intermolecular, electrostatic interactions between neighboring fluorescent proteins (FPs). A random mutagenesis event placed a negative charge on the exterior of the FP, resulting in a greater than 10-fold improvement of the voltage-dependent optical signal. Repositioning this negative charge on the exterior of the FP reversed the polarity of voltage-dependent optical signals, suggesting the presence of “hot spots” capable of interacting with the negative charge on a neighboring FP, thereby changing the fluorescent output. To explore the potential effect on the chromophore state, voltage-clamp fluorometry was performed with alternating excitation at 390 nm followed by excitation at 470 nm, resulting in several mutants exhibiting voltage-dependent, ratiometric optical signals of opposing polarities. However, the kinetics, voltage ranges, and optimal FP fusion sites were different depending on the wavelength of excitation. These results suggest that the FP has external, electrostatic pathways capable of quenching fluorescence that are wavelength specific. One mutation to the FP (E222H) showed a voltage-dependent increase in fluorescence when excited at 390 nm, indicating the ability to affect the proton wire from the protonated chromophore to the H222 position. ArcLight-derived sensors may therefore offer a novel way to map how conditions external to the β-can structure can affect the fluorescence of the chromophore and transiently affect those pathways via conformational changes mediated by manipulating membrane potential.
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- 2020
149. Association between immunotherapy biomarkers and glucose metabolism from F-18 FDG PET
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B S, Kim, J, Kang, S, Jun, H, Kim, K, Pak, G H, Kim, H J, Heo, and Y H, Kim
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Aged, 80 and over ,Male ,Glucose ,Fluorodeoxyglucose F18 ,Positron-Emission Tomography ,Biomarkers, Tumor ,Carcinoma, Squamous Cell ,Humans ,Female ,Immunotherapy ,Adenocarcinoma ,Middle Aged ,Aged - Abstract
To assess associations between parameters derived from F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) and mRNA expression levels of immune checkpoint biomarkers such as programmed death receptor 1 (PD-1), programmed death-ligand 1 (PD-L1), cytotoxic T-lymphocyte antigen 4 (CTLA-4) as well as tumor mutation burden (TMB) in non-small cell lung cancer (NSCLC) patients.Integrated data were downloaded from Genomic Data Common Data Portal. Clinical, mRNA-seq, and whole exome-seq data of lung adenocarcinoma and squamous cell carcinoma from The Cancer Genome Atlas (TCGA) database were analyzed. TMB was defined as the total number of somatic missense mutations per megabase of the genome examined. Expression levels of PD-1, PD-L1, CTLA4 mRNA and TMB were collected. Correlations between imaging parameters of glucose metabolism and the expression levels of genomic biomarkers from cancers were evaluated. Bonferroni correction (adjusted p0.0027) was applied to reduce type 1 error.Of 31 NSCLC cases, 11 cases were adenocarcinoma (LUAD) and 20 were squamous cell carcinoma (LUSC). In linear regression analysis, texture parameters such as low gray-level run emphasis (LGRE, R2=0.48, p0.0001), short run low gray-level emphasis (SRLGE, R2=0.45, p0.0001) and long run low gray-level emphasis (LRLGE, R2=0.41, p=0.0001) derived from gray-level run length matrix (GLRLM) showed remarkable correlation with PD-L1 mRNA expression. Expression of PD-1, CTLA-4, and TMB failed to show any significant correlation with parameters of the F-18 FDG PET/CT.Texture parameters derived from PET, known to indicate glucose uptake distribution, were correlated with expression of PD-L1 mRNA but not with expression of PD-1, CTLA-4 and TMB. Thus, tumoral heterogeneity could be a surrogate marker for the identification of PD-L1 level in NSCLC.
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- 2020
150. Biphasic Electrical Pulse by a Micropillar Electrode Array Enhances Maturation and Drug Response of Reprogrammed Cardiac Spheroids
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Y. H. Kim, Heon Jin Choi, Hyo Jung Lee, Yoonhee Jin, Sungjin Min, Seung Woo Cho, and Jaesuk Sung
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Heartbeat ,Pulse (signal processing) ,Chemistry ,Mechanical Engineering ,Induced Pluripotent Stem Cells ,Spheroid ,Bioengineering ,General Chemistry ,Condensed Matter Physics ,Regenerative medicine ,Cell biology ,Electrophysiology ,Tissue engineering ,Pharmaceutical Preparations ,Heart Rate ,cardiovascular system ,Electrode array ,General Materials Science ,Myocytes, Cardiac ,Reprogramming ,Electrodes - Abstract
Direct reprogramming is an efficient strategy to produce cardiac lineage cells necessary for cardiac tissue engineering and drug testing for cardiac toxicity. However, functional maturation of reprogrammed cardiomyocytes, which is of great importance for their regenerative potential and drug response, still remains challenging. In this study, we propose a novel electrode platform to promote direct cardiac reprogramming and improve the functionality of reprogrammed cardiac cells. Nonviral cardiac reprogramming was improved via a three-dimensional spheroid culture of chemically induced cardiomyocytes exposed to a small-molecule cocktail. A micropillar electrode array providing biphasic electrical pulses mimicking the heartbeat further enhanced maturation and electrophysiological properties of reprogrammed cardiac spheroids, leading to proper responses and increased sensitivity to drugs. On the basis of our results, we conclude that our device may have a wider application in the generation of functional cardiac cells for regenerative medicine and screening of novel drugs.
- Published
- 2020
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