538 results on '"KYUNG HO LEE"'
Search Results
52. Effectiveness and Tolerability of Korean Red Ginseng Augmentation in Major Depressive Disorder Patients with Difficult-to-treat in Routine Practice
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Kyung Ho Lee, Soo-Jung Lee, Chi-Un Pae, and Won-Myong Bahk
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0301 basic medicine ,medicine.medical_specialty ,Therapeutics ,03 medical and health sciences ,Behavioral Neuroscience ,Ginseng ,0302 clinical medicine ,Rating scale ,Internal medicine ,medicine ,Clinical endpoint ,Pharmacology (medical) ,Red ginseng ,Adverse effect ,Depression (differential diagnoses) ,Depressive disorder ,Difficult-to-treat ,business.industry ,Brief Report ,Antidepressants ,medicine.disease ,Clinical trial ,Psychiatry and Mental health ,030104 developmental biology ,Tolerability ,Major depressive disorder ,business ,030217 neurology & neurosurgery - Abstract
Objective : To test clinical effectiveness and tolerability of Korean Red Ginseng augmentation (RGA) in major depressive disorder (MDD) patients with difficult-to-treat. Methods Thirty six patients were enrolled in this 6 weeks, prospective, clinical trial. Rating scales were MontgomeryAsberg Depression Rating Scale (MADRS), Patient Health Questionnaire-15, Clinical Global Impression-improvement (CGI-I), and Patient Satisfaction Score. The primary endpoint was a remission rate measured by MADRS score at the end of study (≤ 10). Clinical outcomes and tolerability were assessed at baseline, week 2, and week 6. Results Among 36 patients, 26 patients completed the study and 28 patients had post-baseline visit data. The remission rate by MADRS score was 39.3% (11/28) and 57.1% by CGI-I scores of 1 or 2 at the end of the study. The mean change of MADRS score was significantly decreased by 44.4% from baseline to the end of study. The most frequent adverse events were headache (7/28, 25.0%) during the study. Conclusion Our study indicates the putative effectiveness and tolerability of RGA for treating MDD with difficult-to-treat in clinical practice. However, adequately powered, randomized, controlled trials will be needed to confirm these results.
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- 2020
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53. The Usefulness and Clinical Characteristics of Antidepressant Use for Stroke Patients with Rehabilitation Program: An Exploratory Analysis
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Won-Myong Bahk, Kyung Ho Lee, Soo-Jung Lee, Chi-Un Pae, and Geun-Young Park
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medicine.medical_specialty ,medicine.medical_treatment ,Antidepressant ,03 medical and health sciences ,Behavioral Neuroscience ,0302 clinical medicine ,Modified Rankin Scale ,Rating scale ,medicine ,Pharmacology (medical) ,030212 general & internal medicine ,Stroke ,Depression (differential diagnoses) ,Mini–Mental State Examination ,Rehabilitation ,medicine.diagnostic_test ,Depression ,business.industry ,Brief Report ,Beck Depression Inventory ,medicine.disease ,Psychiatry and Mental health ,Motor ,Berg Balance Scale ,Physical therapy ,Cognitive function ,business ,Activities ,030217 neurology & neurosurgery - Abstract
Objective There has been a lack of data regarding the usefulness and clinical characteristic between patients-treated with and without antidepressants (Pw/Pwo ADs). Methods One hundred and eighty inpatients were recruited and observed for a 6-month. The depressive, cognitive, daily activity, and motor symptoms were evaluated at baseline and tracked at month 6, with the use of rating scales including Beck Depression Inventory (BDI), Mini Mental State Examination (MMSE), Global Deterioration Scale (GDS), modified Rankin Scale (MRS), modified Barthel Index (MBI), and Berg Balance Scale (BBS). Results Among 178 patients, 84 (47.2%) were treated with ADs. PwAD had numerically or significantly higher depressive cognitive, and motor symptoms along with daily activity impairment (8.3 point higher in BDI score, p < 0.001; 3.6 point lower in MMSE, p = 0.003; 0.8 point higher in GDS score, p = nonsignificant; 8.2 point lower in BBS score, p = 0.053, and 0.4 point higher in MBI score, p = nonsignificant) than PwoAD. Psychiatric consultation was also significantly higher in PwAD than in PwoAD (p < 0.001). The numbers need to treat for good clinical outcomes between PwAD and PwoAD were 5.8, 6.0, and 7.5, respectively, by MRS, MBI, and BBS scores. Conclusion Our findings suggest the potential utility of AD treatment and different clinical parameters between patients- treated with and without ADs. Adequately-powered and well-controlled further studies are mandatory to confirm and fully elaborate such association.
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- 2020
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54. Analysis of Hybrid Brush Seal Rotordynamic Coefficients According to Position of Brush and Clearance Using 3D CFD
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Kyung Ho Lee and Tae Woong Ha
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Materials science ,Position (vector) ,law ,business.industry ,Mechanical Engineering ,Fluent ,Brush ,Mechanics ,Computational fluid dynamics ,business ,Seal (mechanical) ,Industrial and Manufacturing Engineering ,law.invention - Published
- 2020
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55. Review of Waste Acceptance Criteria in USA for Establishing Very Low Level Radioactive Waste Acceptance Criteria in the 3rd Step Landfill Disposal Site
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Kihyun Park, SeWon Chung, Kyung Ho Lee, and Unjang Lee
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Fuel Technology ,Nuclear Energy and Engineering ,Waste management ,Renewable Energy, Sustainability and the Environment ,Acceptance testing ,Western europe ,Radioactive waste ,Environmental science ,Management, Monitoring, Policy and Law ,Waste Management and Disposal ,Nuclear decommissioning ,Waste disposal - Abstract
According to the Korea Radioactive Waste Agency’s (KORAD’s) medium and low level radioactive waste management implementation plan, the Domestic 3rd Step Landfill Disposal Facility has planned to accept a total of 104,000 drums (2 trenches) of very low level radioactive waste (VLLW), from the decommissioning site from April 2019 - February 2026 (total budget: 224.6 billion Won). Subsequently, 260,000 drums (5 trenches) will be disposed in a 34,076 m2. Accordingly, KORAD is preparing a waste acceptance criteria (WAC) for this facility. Every disposal facility for VLLW in other countries such as France and Spain, operate their WAC for each VLLW facility with a reasonable application approach, This, paper focuses on analyzing the WAC conditions in VLLW sites in the USA and discusses whether these can be met in domestic VLLW WAC. It also helps in the preparation of WAC for the 3rd Step Landfill Disposal Site in Gyeongju, since the USA has prior experience on decommissioning nuclear waste.
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- 2020
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56. Evaluation of Ductility of Lightweight Aggregate Concrete T-beam Arranged with Maximum Longitudinal Reinforcement Ratio
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Kyung-Ho Lee, Ju-Hyun Mun, and Yang, Keun-Hyeok
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T-beam ,Materials science ,Aggregate (composite) ,Mechanics of Materials ,Materials Science (miscellaneous) ,Building and Construction ,Composite material ,Ductility ,Reinforcement ,Beam (structure) ,Civil and Structural Engineering - Published
- 2020
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57. Urinary C5b-9 as a Prognostic Marker in IgA Nephropathy
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Byung Chul Yu, Jin Hoon Park, Kyung Ho Lee, Young Seung Oh, Soo Jeong Choi, Jin Kuk Kim, and Moo Yong Park
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complement system proteins ,IgA nephropathy ,membrane attack complex ,prognostic marker ,urinary C5b-9 ,Medicine ,chemical and pharmacologic phenomena ,General Medicine ,urologic and male genital diseases ,female genital diseases and pregnancy complications - Abstract
C5b-9 plays an important role in the pathogenesis of immunoglobin A nephropathy (IgAN). We evaluated C5b-9 as a prognostic marker for IgAN. We prospectively enrolled 33 patients with biopsy-proven IgAN. We analyzed the correlation between baseline urinary C5b-9 levels, posttreatment changes in their levels, and clinical outcomes, including changes in proteinuria, estimated glomerular filtration rate (eGFR), and treatment response. Baseline urinary C5b-9 levels were positively correlated with proteinuria (r = 0.548, p = 0.001) at the time of diagnosis. Changes in urinary C5b-9 levels were positively correlated with changes in proteinuria (r = 0.644, p < 0.001) and inversely correlated with changes in eGFR (r = −0.410, p = 0.018) at 6 months after treatment. Changes in urinary C5b-9 levels were positively correlated with time-averaged proteinuria during the follow-up period (r = 0.461, p = 0.007) but were not correlated with the mean annual rate of eGFR decline (r = −0.282, p = 0.112). Baseline urinary C5b-9 levels were not a significant independent factor that could predict the treatment response in logistic regression analyses (odds ratio 0.997; 95% confidence interval, 0.993 to 1.000; p = 0.078). Currently, urinary C5b-9 is not a promising prognostic biomarker for IgAN, and further studies are needed.
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- 2022
58. Anomaly Detection Method for Unknown Protocols in a Power Plant ICS Network with Decision Tree
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Kyoung-Mun Lee, Min-Yang Cho, Jung-Gu Kim, and Kyung-Ho Lee
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Fluid Flow and Transfer Processes ,Process Chemistry and Technology ,ICS ,unknown protocol ,fingerprint ,anomaly detection ,AI ,General Engineering ,General Materials Science ,Instrumentation ,Computer Science Applications - Abstract
This study aimed to enhance the stability and security of power plant control network systems by developing detectable models using artificial intelligence machine learning techniques. Due to the closed system operation policy of facility manufacturers, it is challenging to detect and respond to security threats using standard security systems. With the increasing digitization of control systems, the risk of external malware penetration is also on the rise. To address this, machine learning techniques were applied to extract patterns from network traffic data produced at an average of 6.5 TB per month, and fingerprinting was used to detect unregistered terminals accessing the control network. By setting a threshold between transmission amounts and attempts using one month of data, an anomaly judgment model was learned to define patterns of data communication between the origin and destination. The hypothesis was tested using machine learning techniques if a new pattern occurred and no traffic occurred. The study confirmed that this method can be applied to not only plant control systems but also closed-structured control networks, where availability is critical, and other industries that use large amounts of traffic data. Experimental results showed that the proposed model outperformed existing models in terms of detection efficiency and processing time.
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- 2023
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59. Applying Memory-Based Learning to Indexing of Reference Ships for Case-Based Conceptual Ship Design.
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Dongkon Lee, Jaeho Kang, Kwang Ryel Ryu, and Kyung-Ho Lee
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- 1997
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60. Minimal Change Disease Is Associated with Mitochondrial Injury and STING Pathway Activation
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Byung Chul Yu, Ahrim Moon, Kyung Ho Lee, Young Seung Oh, Moo Yong Park, Soo Jeong Choi, and Jin Kuk Kim
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minimal change disease ,nutritional and metabolic diseases ,Medicine ,General Medicine ,mitochondrial injury ,prognostic marker ,stimulator of interferon genes pathway ,urinary mitochondrial DNA ,eye diseases - Abstract
We hypothesized that minimal change disease (MCD) pathogenesis may be associated with mitochondrial injury, and that the degree of mitochondrial injury at the time of diagnosis may serve as a valuable prognostic marker. We compared urinary mitochondrial DNA (mtDNA) at the time of diagnosis in patients with MCD and age- and sex-matched healthy controls (MHC) (n = 10 each). We analyzed the site and signal intensity of immunohistochemical (IHC) staining of stimulator of interferon genes (STING) using kidney tissues at the time of diagnosis in patients with MCD. Patients with MCD were divided into high (n = 6) and low-intensity (n = 14) subgroups according to the signal intensity. Urinary mtDNA levels were elevated in the MCD groups more than in the MHC group (p < 0.001). Time-averaged proteinuria and frequency of relapses during the follow-up period were higher in the high-intensity than in the low-intensity subgroup (1.18 ± 0.54 vs. 0.57 ± 0.45 g/day, p = 0.022; and 0.72 ± 0.60 vs. 0.09 ± 0.22 episodes/year, p = 0.022, respectively). Mitochondrial injury may be associated with MCD pathogenesis, and the signal intensity of STING IHC staining at the time of diagnosis could be used as a valuable prognostic marker in MCD.
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- 2022
61. Agent-based collaborative design system and conflict resolution based on a case-based reasoning approach.
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Kyung Ho Lee and Kyu-Yeul Lee
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- 2002
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62. Designing a knowledge base for automatic book classification.
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Jeong-Hyen Kim and Kyung-Ho Lee
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- 2002
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63. Smooth fitting with a method for determining the regularization parameter under the genetic programming algorithm.
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Yun Seog Yeun, Kyung Ho Lee, Sang Min Han, and Young Soon Yang
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- 2001
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64. Phosphorylation of β‐catenin Ser60 by polo‐like kinase 1 drives the completion of cytokinesis
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Jin Tae Hong, Ji Eun Yu, Kyung Ho Lee, Sun-Ok Kim, Bo Yeon Kim, Nak-Kyun Soung, Joonsung Hwang, Hyunjoo Cha-Molstad, Yong Tae Kwon, and Jeong-Ah Hwang
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RHOA ,β‐Catenin p‐S60 ,Cell Cycle Proteins ,cytokinesis ,Spindle Apparatus ,Polo-like kinase ,Protein Serine-Threonine Kinases ,Biology ,Biochemistry ,PLK1 ,Article ,Midbody ,Post-translational Modifications & Proteolysis ,Proto-Oncogene Proteins ,Genetics ,Humans ,Phosphorylation ,Telophase ,Kinase activity ,Molecular Biology ,beta Catenin ,Cell Cycle ,Actomyosin ,Articles ,Cell biology ,Plk1 ,Ect2 ,biology.protein ,Cytokinesis ,HeLa Cells ,Signal Transduction - Abstract
β‐Catenin is a multifunctional protein and participates in numerous processes required for embryonic development, cell proliferation, and homeostasis through various molecular interactions and signaling pathways. To date, however, there is no direct evidence that β‐catenin contributes to cytokinesis. Here, we identify a novel p‐S60 epitope on β‐catenin generated by Plk1 kinase activity, which can be found at the actomyosin contractile ring of early telophase cells and at the midbody of late telophase cells. Depletion of β‐catenin leads to cytokinesis‐defective phenotypes, which eventually result in apoptotic cell death. In addition, phosphorylation of β‐catenin Ser60 by Plk1 is essential for the recruitment of Ect2 to the midbody, activation of RhoA, and interaction between β‐catenin, Plk1, and Ect2. Time‐lapse image analysis confirmed the importance of β‐catenin phospho‐Ser60 in furrow ingression and the completion of cytokinesis. Taken together, we propose that phosphorylation of β‐catenin Ser60 by Plk1 in cooperation with Ect2 is essential for the completion of cytokinesis. These findings may provide fundamental knowledge for the research of cytokinesis failure‐derived human diseases., Phosphorylation of β‐catenin Ser60 by Plk1 in cooperation with Ect2 induces RhoA activation and mediates the progression of furrow ingression and subsequent cytokinesis steps.
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- 2021
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65. Potential Engineering to Enhance Transfer Characteristics of Advanced CIS Pixel based on VTG - FDTI scheme
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Sungchul Kim, Dae Sin Kim, Uihui Kwon, Jae-ho Kim, and Kyung-Ho Lee
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Materials science ,Planar ,Pixel ,business.industry ,Transfer (computing) ,Logic gate ,Semiconductor device modeling ,Optoelectronics ,Electric potential ,Image sensor ,business ,Signal - Abstract
The transfer characteristics of the three different CMOS image sensor (CIS) pixel schemes; the vertical transfer gate (VTG) with the front-side deep trench isolation (FDTI), the VTG with the back-side deep trench isolation (BDTI), and the planar transfer gate (PTG) with the BDTI are rigorously studied with 3D TCAD simulation. The electrical potential profiles of photo-diode (PD) region are optimized in terms of full well capacity (FWC) and transfer characteristics for each scheme. The simulated blooming margin potentials are well matched to the experimental blooming signal. According to our TCAD analysis, the VTG with the FDTI scheme showed high full FWC characteristics compared to the PTG with the BDTI and the VTG with the BDTI.
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- 2021
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66. The Effects of Self-monitoring Cognitive Functions Training Program on the Attention-Concentration Ability and the Hyperactivity of the Children with ADHD Tendency
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Kyung Ho Lee
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Attention Concentration ,Self-monitoring ,General Earth and Planetary Sciences ,Cognition ,Training program ,Psychology ,General Environmental Science ,Developmental psychology - Published
- 2019
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67. Shear Friction Characteristics and Modification Factor of Concrete Prepared Using Expanded Bottom Ash and Dredged Soil Granules
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Kyung-Ho Lee and Keun-Hyeok Yang
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shear friction ,Materials science ,Structural material ,Mathematical model ,Ocean Engineering ,modification factor ,Plasticity ,Compressive strength ,Shear (geology) ,Bottom ash ,Solid mechanics ,Ultimate tensile strength ,lcsh:Systems of building construction. Including fireproof construction, concrete construction ,lightweight aggregate concrete ,Composite material ,lcsh:TH1000-1725 ,monolithic interface ,Civil and Structural Engineering - Abstract
The objective of this study is to assess the shear friction characteristics of lightweight aggregate concrete (LWAC) prepared using artificially expanded bottom ash and dredged soil granules. A total of 37 concrete mixtures were prepared under the classification of three series. In the first and second series, the natural sand content for replacing lightweight fine aggregates and the water-to-cement ratio varied to obtain different densities and compressive strengths of concrete. The third series was designed to estimate the effect of the maximum aggregate size on the friction resistance along the shear crack plane of the monolithic interfaces. The frictional angle of the LWAC tested was formulated as a function of the ratio of the effective tensile and compressive strengths of concrete through the expansion of the integrated mathematical models proposed by Kwon et al., based on the upper-bound theorem of concrete plasticity. When predicting the shear friction strength of LWAC, the present mathematical model exhibits relatively good accuracy, yielding the mean and standard deviation of the ratios between experiments and predictions of 1.06 and 0.14, respectively, whereas the empirical equations proposed by the AASHTO provision and Mattock underestimated the results. Ultimately, an advanced modification factor for shear design of LWAC is proposed as a function of the density and compressive strength of concrete and the maximum size of aggregates.
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- 2019
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68. Development of a Prediction Model of Solar Irradiances Using LSTM for Use in Building Predictive Control
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Eui-Jong Kim, Kyung-Ho Lee, and Byung-Ki Jeon
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Model predictive control ,Computer science ,business.industry ,Artificial intelligence ,business ,Machine learning ,computer.software_genre ,computer - Published
- 2019
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69. Cep131 overexpression promotes centrosome amplification and colon cancer progression by regulating Plk4 stability
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Hye-Min Kim, Jong Seog Ahn, In Ja Ryoo, Yang Hoon Huh, Sangku Lee, Jae-Hyuk Jang, Jinyoung Kim, Yong Tae Kwon, Bo Yeon Kim, Nak Kyun Soung, Jin Ok Yang, Eun Joo Song, Kyung Ho Lee, Dong Hyun Kim, Joonsung Hwang, Ho Jin Han, Sung Kyun Ko, Hee Gu Lee, and Hyunjoo Cha-Molstad
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PLK4 ,Cancer Research ,Centriole ,Cell division ,Colorectal cancer ,Immunology ,Cell Cycle Proteins ,Biology ,Protein Serine-Threonine Kinases ,Article ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,Mice ,0302 clinical medicine ,Cell Line, Tumor ,medicine ,Animals ,Humans ,Centrosome duplication ,Phosphorylation ,lcsh:QH573-671 ,030304 developmental biology ,Centrosome ,0303 health sciences ,lcsh:Cytology ,Intracellular Signaling Peptides and Proteins ,Cell Biology ,Oncogenes ,medicine.disease ,HCT116 Cells ,Cell biology ,Gene Expression Regulation, Neoplastic ,Cytoskeletal Proteins ,HEK293 Cells ,030220 oncology & carcinogenesis ,Colonic Neoplasms ,Disease Progression ,Heterografts ,Cancer development - Abstract
The initiation of centrosome duplication is regulated by the Plk4/STIL/hsSAS-6 axis; however, the involvement of other centrosomal proteins in this process remains unclear. In this study, we demonstrate that Cep131 physically interacts with Plk4 following phosphorylation of residues S21 and T205. Localizing at the centriole, phosphorylated Cep131 has an increased capability to interact with STIL, leading to further activation and stabilization of Plk4 for initiating centrosome duplication. Moreover, we found that Cep131 overexpression resulted in centrosome amplification by excessive recruitment of STIL to the centriole and subsequent stabilization of Plk4, contributing to centrosome amplification. The xenograft mouse model also showed that both centrosome amplification and colon cancer growth were significantly increased by Cep131 overexpression. These findings demonstrate that Cep131 is a novel substrate of Plk4, and that phosphorylation or dysregulated Cep131 overexpression promotes Plk4 stabilization and therefore centrosome amplification, establishing a perspective in understanding a relationship between centrosome amplification and cancer development.
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- 2019
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70. Effect of Natural Sand Content on the Mechanical Properties of Lightweight Aggregate Concrete with Different Compressive Strengths
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Byeong-Seok Choi, Kyung-Ho Lee, and Yang, Keun-Hyeok
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Aggregate (composite) ,Mechanics of Materials ,Materials Science (miscellaneous) ,Content (measure theory) ,Environmental science ,Geotechnical engineering ,Building and Construction ,Natural sand ,Civil and Structural Engineering - Published
- 2019
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71. Development of Training System for Radiation Exposure Reduction and Protection of Local Residents against Radioactivity Release Accidents at Nuclear Power Plants
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SeWon Chung, SeungHyun Ha, TaeYoung Kim, Kyung Ho Lee, Unjang Lee, and San Chae
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Radiation exposure ,Reduction (complexity) ,Waste management ,business.industry ,Training system ,Environmental science ,Nuclear power ,business - Published
- 2019
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72. 3D CAD data extraction and conversion for application of augmented/virtual reality to the construction of ships and offshore structures
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Jae-Joon Lee, Jung-Min Lee, Young-Soo Han, Won-Hyuk Lee, and Kyung-Ho Lee
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0209 industrial biotechnology ,Computer science ,Mechanical Engineering ,Aerospace Engineering ,CAD ,02 engineering and technology ,Customer requirements ,Virtual reality ,Industrial engineering ,Computer Science Applications ,020901 industrial engineering & automation ,Data extraction ,Range (aeronautics) ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Augmented reality ,Submarine pipeline ,Electrical and Electronic Engineering - Abstract
Due to the global economic downturn and low oil prices, orders for offshore plants and vessels have declined. Moreover, the range of regulations has increased and customer requirements have...
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- 2019
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73. Development of a Radiological Training Scenario for Local Government Staff in the Case of a Radioactivity Release Accident at a Nuclear Power Plant
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TaeYoung Kim, SeungHyun Ha, San Chae, Kyung Ho Lee, SeWon Chung, and Unjang Lee
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law ,Radiological weapon ,Local government ,Nuclear power plant ,Operations management ,Business ,Training (civil) ,Accident (philosophy) ,law.invention - Published
- 2019
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74. Effects of ATP regeneration systems on the yields and solubilities of cell-free synthesized proteins
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Byeong-Jin Moon, Dong-Myung Kim, and Kyung-Ho Lee
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Chemistry ,General Chemical Engineering ,02 engineering and technology ,Cell free ,010402 general chemistry ,021001 nanoscience & nanotechnology ,ATP regeneration ,01 natural sciences ,0104 chemical sciences ,Atp level ,Protein biosynthesis ,Biophysics ,0210 nano-technology ,Energy source ,Synthesis system - Abstract
We compared the abilities of several ATP regeneration systems to support the production of soluble proteins in a cell-free synthesis system. While changes in the ATP level in the reaction mixture were variable depending on the ATP regeneration system employed, the yields and solubilities of synthesized proteins did not always correlate with the ATP level. Instead, the efficiency of cell-free protein synthesis was substantially affected by changes in the pH of the reaction mixture. These results suggest that measures to maintain the pH of the reaction mixture should be considered when choosing an energy source for cell-free protein synthesis.
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- 2019
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75. Function approximations by coupling neural networks and genetic programming trees with oblique decision trees.
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Yun Seog Yeun, Kyung Ho Lee, and Young Soon Yang
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- 1999
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76. All-Directional Dual Pixel Auto Focus Technology in CMOS Image Sensors
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Jong-Won Choi, Hyun-cheol Kim, Kyungduck Lee, Eun Sub Shim, Junghyung Pyo, Taesub Jung, Jung-Chak Ahn, Seungki Baek, Bum-Suk Kim, Sungsoo Choi, Chanhee Lee, Kyoung-mok Son, Howoo Park, Jun-seok Yang, Duckhyun Chang, Se-Young Kim, Woo-Seok Choi, Jungbin Yun, and Kyung-Ho Lee
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Autofocus ,Very-large-scale integration ,Pixel ,business.industry ,Image quality ,Computer science ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Good image ,law.invention ,Dual (category theory) ,CMOS ,law ,Computer vision ,Artificial intelligence ,Image sensor ,business ,ComputingMethodologies_COMPUTERGRAPHICS - Abstract
We developed a dual pixel with accurate and all-directional auto focus (AF) performance in CMOS image sensor (CIS). The optimized in-pixel deep trench isolation (DTI) provided accurate AF data and good image quality in the entire image area and over whole visible wavelength range. Furthermore, the horizontal-vertical (HV) dual pixel with the slanted in-pixel DTI enabled the acquisition of all-directional AF information by the conventional dual pixel readout method. These technologies were demonstrated in 1.4μm dual pixel and will be applied to the further shrunken pixels.
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- 2021
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77. Wnt5a-induced docking of Plk1 on HEF1 promotes HEF1 translocation and tumorigenesis
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Jeong-Ah, Hwang, Ji Eun, Yu, Sun-Ok, Kim, Dong Hyun, Kim, Kyoung Sang, Cho, and Kyung Ho, Lee
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Male ,Mice, Inbred BALB C ,Carcinogenesis ,Cell Cycle Proteins ,Protein Serine-Threonine Kinases ,Wnt-5a Protein ,Mice ,HEK293 Cells ,Cell Movement ,Proto-Oncogene Proteins ,Animals ,Humans ,Adaptor Proteins, Signal Transducing ,HeLa Cells - Abstract
Upregulation of human enhancer filamentation 1 (HEF1/NEDD9/Cas-L) and Polo-like kinase 1 (Plk1) is closely correlated with metastasis of human cancer. However, the mechanism by which the overexpression of HEF1 or Plk1 stimulates cancer metastasis and induces tumorigenesis remains enigmatic. In addition, the accumulation of HEF1 at the focal adhesion (FA) is known to be an essential event in cancer cell migration, but the mechanism of how HEF1 is targeted to the FA remains yet to be unveiled.This study was performed to elucidate the FA docking mechanism of HEF1 and to determine its effect on tumorigenesis.To confirm the effect of the kinase on HEF1 translocation, various expression-knockdown stable cell lines were generated using a lentivirus system, and the effect of the HEF1-Plk1 complex on tumorigenesis was confirmed using a xenograft mouse model.Here, we show that Wnt5a-dependent Plk1 binding to HEF1 is critically required for HEF1 translocation to the FA. We also confirmed that Plk1 and CK1δ activities essential for HEF1 translocation are induced by Wnt5a. Finally, we confirmed the induction of tumorigenesis by the HEF1-Plk1 complex in the xenograft mouse model.Our data collectively unveil the Wnt5a-CK1δ-HEF1-Plk1-FA remodeling pathway that governs HEF1 transportation to the FA to induce cell migration and tumorigenesis. This study sheds light on a mechanism underlying tumorigenesis and provides new strategies for anticancer therapy.
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- 2021
78. 28.2 A 400-to-1000nm 24μ W Monolithic PPG Sensor with 0.3A/W Spectral Responsivity for Miniature Wearables
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Lim In-Chun, Jihon Kim, Ju-Hwa Kim, Jeongwook Lim, Long Yan, Seoungjae Yoo, Seung-Hoon Lee, Hye-Lim Park, Jeong-Hoon Park, Jang-beom Yang, Park Jeong-Ho, Rae-Young Kim, Byung-Hoon Ko, Kim Jongboo, Haedo Jeong, Bongjin Sohn, Jeil Ryu, Hee-Jae Jo, Kyung-Ho Lee, Chang Soon Park, Yun-Cheol Han, Jesuk Lee, Dae-Geun Jang, Whee Jin Kim, Wang-Hyun Kim, Sung-jin Jung, Yongin Park, and Taeyoul Jang
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Materials science ,business.industry ,Wearable computer ,law.invention ,Power (physics) ,Photodiode ,Wavelength ,CMOS ,law ,Photoplethysmogram ,Optoelectronics ,business ,Wireless sensor network ,Light-emitting diode - Abstract
Incorporating different wavelength (400 to 1000nm) LEDs, photoplethysmography (PPG) sensors allow wearable devices to monitor various health parameters such as heart rate (HR), oxygen saturation (SpO 2 ), and blood pressure (BP). Nowadays, PPG sensing technology at the wrist is well established. To cope with the large degree of motion turbulence presented at the wrist, PPG sensors use Green (Gr) LEDs together with multiple photodiodes (PD), and they are driven by wide-dynamic-range (DR) current-sensing front-ends [1]. It is attractive to use a near-infra-red (nIR) PPG sensor in a True Wireless Stereo (TWS), as the ear provides the best site to measure heart rhythm (more blood flow, constant distance from the heart, and less motion than at the finger or wrist). However, TWS requires a PPG sensor that is more stringent on size and power consumption (shown in Fig. 28.2.1). A promising solution [2, 3] is integrating an array of PDs with an ADC to dramatically reduce power while also providing monolithic integration. However, the limited DR (
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- 2021
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79. p62-Induced Cancer-Associated Fibroblast Activation via the Nrf2-ATF6 Pathway Promotes Lung Tumorigenesis
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Ji In Kang, Nak Kyun Soung, Kyung Ho Lee, Yong Tae Kwon, Joonsung Hwang, Dong Hyun Kim, Hee Gu Lee, Sang Mi Shim, Bo Yeon Kim, Ki Woon Sung, and Hyunjoo Cha-Molstad
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0301 basic medicine ,Cancer Research ,cancer-associated fibroblast ,p62/SQSTM1/Sequestosome-1 ,Activating transcription factor ,medicine.disease_cause ,lcsh:RC254-282 ,Article ,03 medical and health sciences ,0302 clinical medicine ,medicine ,tumor microenvironment ,selective autophagy ,Tumor microenvironment ,biology ,Chemistry ,ATF6 ,Autophagy ,Transforming growth factor beta ,lung adenocarcinoma ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,activating transcription factor 6 ,030104 developmental biology ,Oncology ,nuclear factor erythroid 2-related factor 2 ,Tumor progression ,030220 oncology & carcinogenesis ,Cancer research ,biology.protein ,Signal transduction ,Carcinogenesis - Abstract
Simple Summary Cancer-associated fibroblasts (CAF) arise from normal fibroblasts within the tumor microenvironment (TME) and promote tumorigenesis through metabolic reprograming and secretion of tumor promoting molecules such as transforming growth factor beta (TGFβ). Here, we show that autophagy plays a key role in CAF activation. During CAF activation, fibroblasts induce the mRNA expression of p62, and resulting p62 targets Keap1 for lysosomal degradation, which allows the nuclear translocation of Nrf2 and transcriptional induction of antioxidant responses. The transcriptional targets of Nrf2 include ATF6, which mediates ER stress responses. Taken together, normal fibroblasts are differentiated into CAFs as protective responses to stresses under TME via the p62-Nrf2 pathway. Abstract Cancer-associated fibroblasts (CAFs) are important in tumor progression. The autophagy adaptor protein, p62/SQSTM1/Sequestosome-1, is up-regulated in tumors, but down-regulated in CAFs in the early stages of lung adenocarcinoma. We investigated whether p62-induced autophagy might control CAF activation. Under CAF-inducing conditions, like hypoxia or cancer cell co-cultures, p62 ablation or autophagy inhibition with hydroxychloroquine (HCQ) impaired CAF activation and reduced transforming growth factor beta (TGFβ) production, which impeded tumor growth. During CAF activation, p62-induced autophagy up-regulated the expression of the anti-oxidant signaling protein, nuclear factor erythroid 2-related factor 2 (Nrf2), and the ER-stress response regulator, activating transcription factor 6 (ATF6). Genetically or pharmacologically inhibiting the Nrf2-ATF6 pathway totally blocked CAF activation and tumor progression. These results demonstrate that p62 is a key modulator of primary lung adenocarcinoma progression. Thus, targeting the p62-Nrf2 autophagy signaling pathway might be a novel, stroma-focused, cancer prevention and/or treatment strategy.
- Published
- 2021
80. Cloud-Based RF-Inspection for Ship Maintenance.
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Jung-Min Lee, Kyung-Ho Lee, and Dae-Seok Kim
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- 2013
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81. Correction to: R-catcher, a potent molecular tool to unveil the arginylome
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Bo Yeon Kim, Geul Bang, Goeun Han, Hye Seon Lee, Kyung Ho Lee, Seung Jun Kim, Ho-Chul Shin, Cheolju Lee, Taewook Seo, Laxman Nawale, Joonsung Hwang, Jung Gi Kim, Jeong Kyu Bang, Jihyo Kim, Jin Young Kim, Nak-Kyun Soung, Shinyeong Ju, and Hyunjoo Cha-Molstad
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Pharmacology ,Physics ,Genetic Vectors ,Correction ,Membrane Proteins ,Cell Biology ,Computational biology ,Aminoacyltransferases ,Arginine ,Endoplasmic Reticulum ,Substrate Specificity ,Cellular and Molecular Neuroscience ,Molecular Medicine ,Humans ,Molecular Biology ,Protein Processing, Post-Translational ,HeLa Cells - Abstract
Protein arginylation is a critical regulator of a variety of biological processes. The ability to uncover the global arginylation pattern and its associated signaling pathways would enable us to identify novel disease targets. Here, we report the development of a tool able to capture the N-terminal arginylome. This tool, termed R-catcher, is based on the ZZ domain of p62, which was previously shown to bind N-terminally arginylated proteins. Mutating the ZZ domain enhanced its binding specificity and affinity for Nt-Arg. R-catcher pulldown coupled to LC-MS/MS led to the identification of 59 known and putative arginylated proteins. Among these were a subgroup of novel ATE1-dependent arginylated ER proteins that are linked to diverse biological pathways, including cellular senescence and vesicle-mediated transport as well as diseases, such as Amyotrophic Lateral Sclerosis and Alzheimer's disease. This study presents the first molecular tool that allows the unbiased identification of arginylated proteins, thereby unlocking the arginylome and provide a new path to disease biomarker discovery.
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- 2021
82. Three-dimensional analysis of lateral cortical hinge in medial open-wedge high tibial osteotomy: A computational simulation study of adult cadavers
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Kyung Ho Lee, Gu-Hee Jung, and Lih Wang
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Adult ,Male ,Three dimensional analysis ,Knee Joint ,Hinge ,Computational simulation ,Young Adult ,Imaging, Three-Dimensional ,lcsh:Orthopedic surgery ,High tibial osteotomy ,Cadaver ,Open wedge ,Medicine ,Humans ,Computer Simulation ,Tibia ,Aged ,Orthodontics ,Aged, 80 and over ,business.industry ,Prostheses and Implants ,Middle Aged ,Osteotomy ,lcsh:RD701-811 ,Fibula ,Surgery ,Female ,business ,Tomography, X-Ray Computed - Abstract
Purpose: The objective of this study was to improve the three-dimensional (3D) understanding of optimal lateral cortical hinge in medial open-wedge high tibial osteotomy (MOWHTO) via a computational cadaveric simulation of actual size. Methods: The computed tomography data of 117 adult cadavers were imported into Mimics® software to design 3D models of tibia and fibula. To simulate the MOWTHO, a virtual cutting plane was developed inside the safe zone based on established landmarks. After splitting and distracting through the cutting plane, the 10-mm cylinder (Ø 30 mm; height 10 mm) was placed vertically to be occupied properly in the nonosteotomized lateral cortex. The cross points between the round cylinder and cutting plane represented the anterior and posterior hinge points, which were used to validate the 3D position and direction of cortical hinge. Results: A 10-mm cylinder did not violate the proximal tibiofibular joint (PTFJ) and the protruding segment of the condylar area was less than 2 mm in 115 models. The connecting line between anterior and posterior hinge points was an average of 12.1° (range 0–24.1°, SD 4.64) to the lateral side. In the nonoverlapping anteroposterior projection between proximal fibula and tibia, the posterior hinge point was laid over the PTFJ as close as possible. Based on free 360° rotation and magnification without any tilt, no posterior cortical disruption of PTFJ was observed while securing a minimum width of 10 mm. Conclusion: If the posterior hinge point was placed immediately above the PTFJ without involvement, the nonosteotomized portion carried sufficient width greater than 10 mm, despite lateral rotation at an average hinge direction of 12.1°.
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- 2020
83. Aptamer-linked in vitro expression assay for ultrasensitive detection of biomarkers
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Kyung-Ho Lee, Yong-Beom Shin, Ju-Young Byun, Min-Seok Baek, and Dong-Myung Kim
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Reporter gene ,Chemistry ,Aptamer ,010401 analytical chemistry ,02 engineering and technology ,Computational biology ,Aptamers, Nucleotide ,021001 nanoscience & nanotechnology ,01 natural sciences ,Biochemistry ,In vitro ,0104 chemical sciences ,Analytical Chemistry ,Nucleic acid ,Environmental Chemistry ,Biomarker (medicine) ,0210 nano-technology ,Signal amplification ,Spectroscopy ,Function (biology) ,Biomarkers - Abstract
Signal amplification is a key step that determines the sensitivity of molecular assays. Although studies on aptamers have mostly focused on their target-binding ability, taking advantage of the gene-coding function of nucleic acids, we demonstrate here that aptamers can be engineered into diagnostic reagents that can both recognize a target and generate highly amplified detection signals. We developed a strategy that employs a ‘readable’ aptamer that consists of a single-stranded aptamer and a double-stranded reporter gene. After binding to its target via the aptamer region, the reporter gene of the readable aptamer produces amplified number of signal-generating enzymes through a subsequent in vitro expression reaction. In contrast to conventional enzyme-conjugation methods, this method allows the generation of far more amplified detection signals, thereby markedly increasing the sensitivity of detection enough to analyze a target present in aM concentrations.
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- 2020
84. Translational Detection of Nonproteinogenic Amino Acids Using an Engineered Complementary Cell-Free Protein Synthesis Assay
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Yeon Jae Jang, Dong-Myung Kim, Hye Jin Lim, and Kyung-Ho Lee
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Cell Extracts ,Ornithine ,Proteomics ,Cell ,Argininosuccinate Synthase ,Arginine ,Analytical Chemistry ,Substrate Specificity ,Amino acid analysis ,medicine ,Protein biosynthesis ,Escherichia coli ,Amino Acid Sequence ,Proteinogenic amino acid ,chemistry.chemical_classification ,Cell-free protein synthesis ,In vitro metabolism ,Proteins ,Stereoisomerism ,Argininosuccinate Lyase ,Amino acid ,medicine.anatomical_structure ,Enzyme ,Biochemistry ,chemistry ,Carboxyl and Carbamoyl Transferases ,Citrulline ,Protein Processing, Post-Translational - Abstract
We developed a simple and rapid method for analyzing nonproteinogenic amino acids that does not require conventional chromatographic equipment. In this technique, nonproteinogenic amino acids were first converted to a proteinogenic amino acid through in vitro metabolism in a cell extract. The proteinogenic amino acid generated from the nonproteinogenic precursors were then incorporated into a reporter protein using a cell-free protein synthesis system. The titers of the nonproteinogenic amino acids could be readily quantified by measuring the activity of reporter proteins. This method, which combines the enzymatic conversion of target amino acids with translational analysis, makes amino acid analysis more accessible while minimizing the cost and time requirements. We anticipate that the same strategy could be extended to the detection of diverse biochemical molecules with clinical and industrial implications.
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- 2020
85. Involvement of Wnt signaling in primary cilia assembly and disassembly
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Kyung Ho Lee
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0301 basic medicine ,Cell signaling ,Biology ,Biochemistry ,Microtubules ,03 medical and health sciences ,0302 clinical medicine ,Microtubule ,Ciliogenesis ,medicine ,Basal body ,Animals ,Humans ,Cilia ,Molecular Biology ,Mitosis ,Wnt Signaling Pathway ,Cilium ,Wnt signaling pathway ,Cell Biology ,medicine.disease ,Ciliopathies ,Cell biology ,Ciliopathy ,030104 developmental biology ,030220 oncology & carcinogenesis - Abstract
The primary cilium is a non-motile microtubule-based structure, which functions as an antenna-like cellular sensing organelle. The primary cilium is assembled from the basal body, a mother centriole-based structure, during interphase or a quiescent cell stage, and rapidly disassembles before entering mitosis in a dynamic cycle. Defects in this ciliogenesis dynamics are associated with human diseases such as ciliopathy and cancer, but the molecular mechanisms of the ciliogenesis dynamics are still largely unknown. To date, various cellular signaling pathways associated with primary cilia have been proposed, but the main signaling pathways regulating primary cilia assembly/disassembly remain enigmatic. This review describes recent findings in Wnt-induced primary cilia assembly/disassembly and potential future directions for the study of the cellular signaling related to the primary ciliogenesis dynamics.
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- 2020
86. Efficacy and Safety of Ursodeoxycholic Acid for the Prevention of Gallstone Formation After Gastrectomy in Patients With Gastric Cancer: The PEGASUS-D Randomized Clinical Trial
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Soyeon Ahn, Seong-Yeob Ryu, Bang Wool Eom, Taeil Son, Min-Gew Choi, Hye Seong Ahn, Kyung Ho Lee, Sun-Hwi Hwang, Oh Kyoung Kwon, Kyo Young Song, Han Hong Lee, Hoon Hur, Young Suk Park, Do Joong Park, Hong Man Yoon, Sang-Il Lee, Ji Yeong An, Moon-Won Yoo, Dong Kee Jang, and Sang Hyub Lee
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Male ,medicine.medical_specialty ,Randomization ,medicine.medical_treatment ,Gallstones ,030230 surgery ,Placebo ,Gastroenterology ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Postoperative Complications ,Randomized controlled trial ,Double-Blind Method ,law ,Gastrectomy ,Stomach Neoplasms ,Internal medicine ,Clinical endpoint ,Medicine ,Humans ,Aged ,Original Investigation ,business.industry ,Ursodeoxycholic Acid ,Middle Aged ,medicine.disease ,Ursodeoxycholic acid ,Clinical trial ,Treatment Outcome ,030220 oncology & carcinogenesis ,Surgery ,Female ,business ,medicine.drug - Abstract
IMPORTANCE: The incidence of gallstones has been reported to increase after gastrectomy. However, few studies have been conducted on the prevention of gallstone formation in patients who have undergone gastrectomy. OBJECTIVE: To evaluate the efficacy and safety of ursodeoxycholic acid (UDCA) in preventing gallstone formation after gastrectomy in patients with gastric cancer. DESIGN, SETTING, AND PARTICIPANTS: The PEGASUS-D study (Efficacy and Safety of DWJ1319 in the Prevention of Gallstone Formation after Gastrectomy in Patient with Gastric Cancer: A Multicenter, Randomized, Double-blind, Placebo-controlled Study) was a randomized, double-blind, placebo-controlled clinical trial conducted at 12 institutions in the Republic of Korea. Adults (aged ≥19 years) with a diagnosis of gastric cancer who underwent total, distal, or proximal gastrectomy were enrolled between May 26, 2015, and January 9, 2017; follow-up ended January 8, 2018. Efficacy was evaluated by both the full analysis set, based on the intention-to-treat principle, and the per-protocol set; full analysis set findings were interpreted as the main results. INTERVENTIONS: Eligible participants were randomly assigned to receive 300 mg of UDCA, 600 mg of UDCA, or placebo at a ratio of 1:1:1. Ursodeoxycholic acid and placebo were administered daily for 52 weeks. MAIN OUTCOMES AND MEASURES: Gallstone formation was assessed with abdominal ultrasonography every 3 months for 12 months. Randomization and allocation to trial groups were carried out by an interactive web-response system. The primary end point was the proportion of patients developing gallstones within 12 months after gastrectomy. RESULTS: A total of 521 patients (175 received 300 mg of UDCA, 178 received 600 mg of UDCA, and 168 received placebo) were randomized. The full analysis set included 465 patients (311 men; median age, 56.0 years [interquartile range, 48.0-64.0 years]), with 151 patients in the 300-mg group, 164 patients in the 600-mg group, and 150 patients in the placebo group. The proportion of patients developing gallstones within 12 months after gastrectomy was 8 of 151 (5.3%) in the 300-mg group, 7 of 164 (4.3%) in the 600-mg group, and 25 of 150 (16.7%) in the placebo group. Compared with the placebo group, odds ratios for gallstone formation were 0.27 (95% CI, 0.12-0.62; P = .002) in the 300-mg group and 0.20 (95% CI, 0.08-0.50; P
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- 2020
87. P0369MINOR GLOMERULAR ABNORMALITIES ARE ASSOCIATED WITH DETERIORATION OF LONG-TERM KIDNEY FUNCTION AND MITOCHONDRIAL INJURY
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Ahrim Moon, Soo Jeong Choi, Su Jung Park, Jin Kuk Kim, Seung Duk Hwang, Jin Hoon Park, Byung Chul Yu, Mooyong Park, and Kyung Ho Lee
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Transplantation ,medicine.medical_specialty ,medicine.diagnostic_test ,biology ,business.industry ,Urinary system ,Treatment outcome ,Urology ,Renal function ,Cytochrome c reductase ,Kidney Glomerulus ,Mitochondrion ,Nephrology ,medicine ,biology.protein ,Cytochrome c oxidase ,Renal biopsy ,business - Abstract
Background and Aims Minor glomerular abnormalities (MGAs) are unclassified glomerular lesions indicated by the presence of minor structural abnormalities that are insufficient for a specific pathological diagnosis. The long-term clinical outcomes and pathogenesis have not been examined. We hypothesized that MGAs would be associated with the deterioration of long-term kidney function and increased urinary mitochondrial DNA (mtDNA) copy numbers. Method We retrospectively enrolled patients with MGAs, age-/sex-/estimated glomerular filtration rate (eGFR)-matched patients with IgA nephropathy (IgAN), and similarly matched healthy controls (MHCs; n = 49 each). We analyzed the time×group interaction effects of the eGFR and compared mean annual eGFR decline rates between the groups. We prospectively enrolled patients with MGAs, age- and sex-matched patients with IgAN, and MHCs (n = 15 each) and compared their urinary mtDNA copy numbers. Results Compared to the MHC group, the MGA and IgAN groups displayed differences in the time×group effects of eGFR (Figure 1), higher mean annual rates of eGFR decline (Table), and higher urinary mtDNA copy numbers (Figure 2); however, these groups did not significantly differ from each other. Conclusion The results indicate that MGAs are associated with deteriorating long-term kidney function, and mitochondrial injury, despite few additional pathological changes. We suggest that clinicians conduct close long-term follow-up of patients with MGAs.
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- 2020
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88. Short-Term Electricity Consumption Prediction based on Occupancy Information Using Deep-Learning Network Models
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Younggy Shin, Byung-Ki Jeon, Kyung-Ho Lee, Min-Suk Kong, and Eui-Jong Kim
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Consumption (economics) ,Occupancy ,business.industry ,Computer science ,Deep learning ,Artificial intelligence ,Electricity ,Environmental economics ,business ,Network model ,Term (time) - Published
- 2019
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89. Effect of Sand Content on the Workability and Mechanical Properties of Concrete Using Bottom Ash and Dredged Soil-based Artificial Lightweight Aggregates
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Kyung-Ho Lee, Nguyen Van Tuan, Ju-Hyun Mun, and Keun-Hyeok Yang
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dredged soil ,density ,Materials science ,Structural material ,Bond strength ,0211 other engineering and technologies ,sand content ,020101 civil engineering ,Ocean Engineering ,02 engineering and technology ,Slip (materials science) ,mechanical properties ,0201 civil engineering ,bottom ash ,Compressive strength ,Properties of concrete ,Bottom ash ,021105 building & construction ,Solid mechanics ,Ultimate tensile strength ,lcsh:Systems of building construction. Including fireproof construction, concrete construction ,lightweight aggregate concrete ,Composite material ,lcsh:TH1000-1725 ,Civil and Structural Engineering - Abstract
The objective of this study is to examine the workability and various mechanical properties of concrete using artificial lightweight aggregates produced from expanded bottom ash and dredged soil. Fifteen concrete mixes were classified into three groups with regard to the designed compressive strengths corresponding to 18 MPa, 24 MPa, and 35 MPa. In each group, lightweight fine aggregates were replaced by using natural sand from 0 to 100% at an interval of 25%. Thus, the density of concrete ranged between 1455 and 1860 kg/m3. Based on the regression analysis using test data, a reliable model was proposed to clarify lower early-age strength and higher long-term strength gains of lightweight aggregate concrete (LWAC) when compared with the predictions of the fib model. The proposed model also indicates that a lower water-to-cement ratio is required with the decrease in the natural sand content to achieve the designed compressive strength of concrete. The partial use natural sand is favorable for enhancing the tensile resistance capacity, shear friction strength, and bond behavior with a reinforcing bar of LWAC. The fib model overestimates direct tensile strength, bond strength and the amount of slip at the peak bond stress of LWAC. Therefore, it is necessary to consider the density of concrete as a critical factor in conjunction with its compressive strength to rationally evaluate the various mechanical properties of LWAC.
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- 2019
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90. A Case of Seborrheic Keratosis on the Volar Side of the Fingers after Skin Graft
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Hyo Jin Park, Kyung Ho Lee, and Chul Jong Park
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Dermatology - Published
- 2020
91. Lymphatic endothelial cells promote T lymphocyte migration into lymph nodes under hyperlipidemic conditions
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Kyung Ho Lee, Minhwa Park, Kyung Ah Cho, So Youn Woo, and Yu Hee Kim
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0301 basic medicine ,Male ,Chemokine ,government.form_of_government ,medicine.medical_treatment ,T cell ,Heart Ventricles ,T-Lymphocytes ,Biophysics ,Palmitic Acid ,Neovascularization, Physiologic ,Hyperlipidemias ,Biochemistry ,Cell Line ,03 medical and health sciences ,0302 clinical medicine ,Cell Movement ,Lymphatic vessel ,medicine ,Animals ,Molecular Biology ,biology ,Ventricular Remodeling ,Chemistry ,Endothelial Cells ,Cell Biology ,Cell biology ,Diet ,Mice, Inbred C57BL ,Lymphatic Endothelium ,030104 developmental biology ,medicine.anatomical_structure ,Cytokine ,Lymphatic system ,Vascular endothelial growth factor C ,030220 oncology & carcinogenesis ,government ,biology.protein ,Lymph ,Lymph Nodes ,Chemokines - Abstract
Lymphatic vessels serve as conduits through which immune cells traffic. Because lymphatic vessels are also involved in lipid transport, their function is vulnerable to abnormal metabolic conditions such as obesity and hyperlipidemia. Exactly how these conditions impact immune cell trafficking, however, is not well understood. Here, we found higher numbers of LYVE-1-positive lymphatic endothelial cells and CD3-positive T cells in the lymph nodes of mice fed high-cholesterol or high-fat diets compared with those of mice fed a normal chow diet. To confirm the effect of fat content on immune cell trafficking, the lymphatic endothelial SVEC4-10 cell line was treated with palmitic acid at a 100 μM concentration. After 24 h, palmitic acid-treated cells exhibited increased expression of podoplanin and vascular growth-associated molecules (VEGFC, VEGFD, VEGFR3, and NRP2) and enhanced tube formation. Microarray analysis showed an increase in pro-inflammatory cytokine and chemokine transcription after palmitic acid treatment. Finally, transwell migration assay confirmed that T cell line moved toward medium previously cultured with palmitic acid-treated SVEC4-10 cells. Together, our results suggest that hyperlipidemia drives lymphatic vessel remodeling and T cell migration toward lymphatic endothelial cells.
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- 2020
92. 22.2 An 8.5Gb/s/pin 12Gb-LPDDR5 SDRAM with a Hybrid-Bank Architecture using Skew-Tolerant, Low-Power and Speed-Boosting Techniques in a 2nd generation 10nm DRAM Process
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Kim Sang-Yun, Junghwan Park, Soo-bong Chang, Won-Il Bae, Ki-Won Park, Hyuck-Joon Kwon, Seung-Jun Bae, Geun-Tae Park, Hyung-Joon Chi, Kyung-Ho Lee, Hye-In Choi, Ji-Suk Kwon, Gil-Young Kang, Seung-Jun Lee, Hyunyoon Cho, Jin-Seok Heo, Young-Soo Sohn, Lim Suk-Hyun, Kyung Ryun Kim, Kwang-Il Park, Daesik Moon, Chang-Kyo Lee, Jae-Hoon Jung, Dongkeon Lee, Chang-Ho Shin, Cheol Kim, Jung-Bae Lee, Young-Il Lim, Dae Hyun Kim, Jinsol Park, Seouk-Kyu Choi, Jin-Hun Jang, Ki-Han Kim, Young Hoon Son, Byongwook Na, Isak Hwang, Duk-ha Park, Su-Yeon Doo, and Choi Yeon-Kyu
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Boosting (machine learning) ,business.industry ,Computer science ,law ,Transistor ,Skew ,Process (computing) ,business ,Computer hardware ,Dram ,Power (physics) ,Jitter ,law.invention - Abstract
Energy efficiency in mobile devices is a pivotal criteria from the overall system point of view, Although the 7,5Gb/s 8Gb LPDDR5 [1], with low-power schemes (internal data copy, dynamic-voltage-frequency scaling (DVFS), and a deep-sleep mode (DSM)), achieves improved energy efficiency compared to the previous LPDDR4X [2], the market demands for higher density and speed gradually increase for high-end applications including hand-held artificial intelligence (AI) and advanced driver assistance system (ADAS), To achieve higher density and speed in a power-efficient manner, this paper proposes a 8,5Gb/s 12Gb LPDDR5 with a hybrid bank architecture (split/merged bank), a skew-tolerant scheme, bus-based ROBI AC, and speed-boosting techniques based on 2nd generation 10nm DRAM process, Adopting a hybrid bank architecture and skew-tolerant scheme enables high speed and power-optimization for each bank-mode in high density memories, Moreover, bus-based RDBI AC achieves 2,1 % current gain and command-based WCK control scheme achieves 36mA saving at WCK-always-on mode, The speed-boosting techniques (duty-cycle correction (DCC), an active-resonant load, and at-tap DFE receiver) provide improved operating speeds from 7,5Gb/s to 8,5Gb/s@VDD2H = 1, 05V, where the read/write DQ valid windows are 0,60UI and 0.64UI (1UI = 118ps).
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- 2020
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93. The Effect of Lunge Exercise on the Balance of Unstable Supporting surface of adult in their twenties
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Jin-Kyung Lee, Ji-Woong Hong, Hyung-Sang Park, Mi-Sun Ji, Yoon-Hee Cha, Ji-Hye Kim, Se-Mi Kim, Su-Jeong Song, Hye-Lim Ha, Hye-Min Jeon, Ji-Eun Park, Da-Young Lee, Kyung-Ho Lee, Jong-Bae Lee, and Hyun-Soo Bang
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medicine.medical_specialty ,Balance (accounting) ,Physical medicine and rehabilitation ,Economics ,medicine - Published
- 2018
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94. Cascading Amplification of Immunoassay Signal by Cell-Free Expression of Firefly Luciferase from Detection Antibody-Conjugated DNA in an Escherichia coli Extract
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Dong-Myung Kim, Ju-Young Byun, Kyung-Ho Lee, and Yong-Beom Shin
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Bioengineering ,02 engineering and technology ,medicine.disease_cause ,01 natural sciences ,Antibodies ,chemistry.chemical_compound ,Limit of Detection ,Luciferases, Firefly ,Escherichia coli ,medicine ,Animals ,Humans ,Luciferase ,Instrumentation ,Immunoassay ,Fluid Flow and Transfer Processes ,chemistry.chemical_classification ,Detection limit ,Cell-free protein synthesis ,medicine.diagnostic_test ,biology ,Benzidines ,Process Chemistry and Technology ,010401 analytical chemistry ,Fireflies ,Temperature ,Reproducibility of Results ,DNA ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Enzyme ,chemistry ,Biochemistry ,biology.protein ,Luminol ,Rabbits ,alpha-Fetoproteins ,Antibody ,0210 nano-technology ,Biomarkers - Abstract
An expression immunoassay is a powerful technique that combines unique features of immunosorbent assays and cell-free protein synthesis. The main advantage of the expression immunoassay is a greatly amplified signal, whereas a conventional enzyme-linked immunosorbent assay (ELISA) employs a single enzyme molecule conjugated to a detection antibody to produce a measurable signal. Expression immunoassays utilize a DNA molecule conjugated to a target-bound antibody to generate multiple enzyme molecules that then produce the signal. To date, expression immunoassays have not been widely adopted due to the limited availability of efficient methods for translating antibody-conjugated DNA. We developed a highly efficient translation module for expression immunoassays using an Escherichia coli extract-based cell-free protein synthesis system. When we used our immunoassay technique to detect α-fetoprotein, we achieved a limit of detection of 7 fM. Given the outstanding sensitivity that can be obtained with only minimal modifications to the procedure of standard ELISA, we believe that this method will open up new possibilities for widespread application of expression immunoassays to ultrasensitive detection and diagnostics.
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- 2018
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95. Shrinkage strains of lightweight aggregate concrete using expanded bottom ash and dredged soil granules
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Kyung-Ho Lee, Hyun-Sub Yoon, and Keun-Hyeok Yang
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Materials science ,Shrinkage strain ,0211 other engineering and technologies ,02 engineering and technology ,Building and Construction ,021001 nanoscience & nanotechnology ,Natural sand ,Standard deviation ,Time function ,Bottom ash ,021105 building & construction ,General Materials Science ,Composite material ,0210 nano-technology ,Porosity ,Curing (chemistry) ,Civil and Structural Engineering ,Shrinkage - Abstract
The objective of the present study is to provide a databank and comprehensible design equations for the shrinkage strain curve of lightweight aggregate concrete (LWAC) by using artificially expanded bottom ash and dredged soil granules. A total of 25 concrete mixtures were prepared with regard to the parameters of the substitution level of natural sand for lightweight fine aggregates and water-to-cement ratios. Based on the experimental observations, the time function, and 91-day shrinkage strain as a specific point were formulated by introducing the parameter of an equivalent porosity of aggregates to rationally evaluate the shrinkage strain curve of LWAC. Test results showed that the amount of shrinkage strain at 28 days ranged between 39% and 55% of that measured at 210 days, indicating that the acceleratory period was delayed due to the internal curing effect of lightweight aggregates. The shrinkage strains of LWAC decreased in proportion to the equivalent porosity ( P eq ) of aggregates, showing that the decreasing rates of the shrinkage strains ranged between 16% and 36% at 3 days, and 21% and 23% at 180 days when P eq value increased from 21.8% to 42.9%. For the proposed equations, the mean and standard deviation of the normalized root-mean-square error values between experiments and predictions are 0.44 and 0.21, respectively, resulting in a better accuracy than the code models (fib 2010 and EC 2) of which comparisons resulted in high overestimation, especially at an early age.
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- 2018
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96. Detergent-assisted Enhancement of the Translation Rate during Cell-free Synthesis of Peptides in an Escherichia coli Extract
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Dong-Myung Kim, Seo-Young Go, and Kyung-Ho Lee
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0301 basic medicine ,chemistry.chemical_classification ,Antimicrobial peptides ,Biomedical Engineering ,Bioengineering ,Peptide ,Translation (biology) ,Antimicrobial ,medicine.disease_cause ,Applied Microbiology and Biotechnology ,Chemical synthesis ,03 medical and health sciences ,030104 developmental biology ,chemistry ,Biochemistry ,Yield (chemistry) ,medicine ,Industrial and production engineering ,Escherichia coli ,Biotechnology - Abstract
The open nature of cell-free synthesis allows customization of the reaction conditions for given target molecules using diverse biological and non-biological substances. This study demonstrates that non-ionic detergents can be used to enhance translation during the synthesis of peptides in a cell-free system derived from an Escherichia coli extract. The yield of the antimicrobial peptide Cecropin P1 was markedly increased in the presence of detergents. The stimulatory effect of detergents was not limited to the Cecropin P1 peptide, but the detergent also enhanced the translation of other antimicrobial peptides. Furthermore, the enhanced translation rate by detergents was maintained for extended periods by a continuous exchange cell-free synthesis reaction, leading to production of antimicrobial peptides with markedly improved yields.
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- 2018
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97. Synthesis of (R,R)-2,3-butanediol from starch in a hybrid cell-free reaction system
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Hye Jin Lim, So Jeong Lee, Dong-Myung Kim, Tong Yi, and Kyung-Ho Lee
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0106 biological sciences ,0301 basic medicine ,Cyanobacteria ,chemistry.chemical_classification ,biology ,Starch ,General Chemical Engineering ,biology.organism_classification ,medicine.disease_cause ,01 natural sciences ,Metabolic engineering ,Biological pathway ,03 medical and health sciences ,Metabolic pathway ,chemistry.chemical_compound ,030104 developmental biology ,Enzyme ,chemistry ,Biochemistry ,010608 biotechnology ,medicine ,2,3-Butanediol ,Escherichia coli - Abstract
In this study, we demonstrate the conversion of starch to (R,R)-2,3-butanediol (2,3-BD) in a hybrid cell-free synthesis system containing a mixture of lysates derived from Escherichia coli (E. coli) and cyanobacteria. A sufficient pool of pyruvate required for the synthesis of 2,3-BD was generated by combining metabolic pathways of cyanobacteria and E. coli. Successful synthesis of 2,3-BD was achieved by additional modifications of the hybrid cell-free system with the enzymes required to convert pyruvate to 2,3-BD. The results demonstrate a new approach to harness biological pathways to expand the scope of cell-free metabolic engineering by cross-species combinations of cell lysates.
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- 2018
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98. Rapid determination of effective folding agents by sequential cell-free protein synthesis
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Dong-Myung Kim, Hye Jin Lim, and Kyung-Ho Lee
- Subjects
0106 biological sciences ,0301 basic medicine ,Cell-free protein synthesis ,Environmental Engineering ,biology ,Chemistry ,Biomedical Engineering ,Bioengineering ,Translation (biology) ,biology.organism_classification ,01 natural sciences ,law.invention ,Folding (chemistry) ,03 medical and health sciences ,030104 developmental biology ,Biochemistry ,law ,010608 biotechnology ,Recombinant DNA ,Protein biosynthesis ,Protein folding ,Candida antarctica ,Gene ,Biotechnology - Abstract
Cell-free protein synthesis enables the direct translation of genetic information into the corresponding proteins, and thus provides a powerful platform for functional assays of protein-coding genes. In this study, taking advantage of the configurational flexibility of cell-free protein synthesis, we developed a method to study the effect of molecular chaperones on the functional synthesis of recombinant proteins. After the synthesis of a series of molecular chaperones, the reaction mixture for cell-free protein synthesis was reprogrammed for synthesis of Candida antarctica lipase B (CalB). The effect of a pre-synthesized molecular chaperone on protein folding was determined by measuring the enzymatic activity of CalB synthesized in the second reaction. Using this sequential expression experiment, we could rapidly determine the molecular chaperones that effectively assisted the functional synthesis of CalB. We believe that the presented strategy will provide a versatile platform for the optimal production of functional proteins, and can also be extended to studies of other interacting proteins.
- Published
- 2018
- Full Text
- View/download PDF
99. Alopecia areata and overt thyroid diseases: A nationwide population-based study
- Author
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Tai Kyung Noh, Jung Min Bae, Min Wha Choi, Tae Young Han, Kyung Ho Lee, Jae-Seung Yun, and June Hyunkyung Lee
- Subjects
Adult ,Male ,0301 basic medicine ,medicine.medical_specialty ,Adolescent ,Alopecia Areata ,Graves' disease ,Hashimoto Disease ,Dermatology ,Disease ,Severity of Illness Index ,Gastroenterology ,Young Adult ,030207 dermatology & venereal diseases ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,Internal medicine ,Republic of Korea ,medicine ,Humans ,Child ,Aged ,Aged, 80 and over ,Autoimmune disease ,business.industry ,Incidence ,Thyroid ,Alopecia totalis ,General Medicine ,Odds ratio ,Middle Aged ,Alopecia areata ,medicine.disease ,Graves Disease ,Cross-Sectional Studies ,030104 developmental biology ,medicine.anatomical_structure ,Case-Control Studies ,Alopecia universalis ,Female ,business - Abstract
An association between alopecia areata (AA) and other autoimmune diseases has been reported. We investigated the associations between AA and overt autoimmune thyroid diseases. A nationwide, population-based, cross-sectional study was performed using the Korea National Health Insurance claims database. We defined patients with AA as those whose records showed at least four physician contacts in which AA, alopecia totalis (AT) or alopecia universalis (AU) was the principal diagnosis. We also established an age- and sex-matched control group without AA. In a subgroup analysis, patients with AT or AU were classified into the severe AA group, and the remainder were classified into the mild to moderate AA group. Patients with AA were at an increased risk of Graves' disease (odds ratio [OR], 1.415; 95% confidence interval [CI], 1.317-1.520) and Hashimoto thyroiditis (OR, 1.157; 95% CI, 1.081-1.237), and the associations were stronger in the severe AA group (Graves' disease: OR, 1.714; 95% CI, 1.387-2.118; Hashimoto thyroiditis: OR, 1.398; 95% CI, 1.137-1.719). In conclusion, AA was significantly associated with overt autoimmune thyroid diseases. Furthermore, the risk was much higher in the severe AA group.
- Published
- 2018
- Full Text
- View/download PDF
100. Development of Weather Forecast Models for a Short-term Building Load Prediction
- Author
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Kyung-Ho Lee, Byung-Ki Jeon, and Eui-Jong Kim
- Subjects
Meteorology ,Environmental science ,Numerical weather prediction ,Term (time) - Published
- 2018
- Full Text
- View/download PDF
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