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Corrosion characteristics of single-phase Mg-3Zn alloy thin film for biodegradable electronics

Journal of Magnesium and Alloys 2023年第9期11卷 3241-3254页

作者： Ji-woo Gu Jae-Young Bae Guangzhe Li Hae Won Hwang So-Hyeon Lee Sung-Geun Choi Ju-Young Kim Myoung-Ryul Ok Yu-chan Kim Seung-Kyun Kang Department of Materials Science and Engineering Seoul National University(SNU)Seoul 08826Republic of Korea Research Institute of Advanced Materials(RIAM) Seoul National UniversitySeoul 08826Republic of Korea Soft Foundry Nano Systems Institute(NSI) Seoul National UniversitySeoul 08826Republic of Korea Biomaterials Research Center Biomedical Research DivisionKorea Institute of Science and Technology(KIST)Seoul 34141Republic of Korea Division of Bio-Medical Science and Technology KIST SchoolKorea University of Science and TechnologySeoul 02792Republic of Korea Department of Materials Science and Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea

Biodegradable metals as electrodes, interconnectors, and device conductors are essential components in the emergence of transient electronics, either for passive implants or active electronic devices, especially in the fields of biomedical electronics. Magnesium and its alloys are strong candidates for biodegradable and implantable conducting materials because of their high conductivity and biocompatibility, in addition to their well-understood dissolution behavior. One critical drawback of Mg and its alloys is their considerably high dissolution rates originating from their low anodic potential, which disturbs the compatibility to biomedical applications. Herein, we introduce a single-phase thin film of a Mg-Zn binary alloy formed by sputtering, which enhances the corrosion resistance of the device electrode, and verify its applicability in biodegradable electronics. The formation of a homogeneous solid solution of single-phase Mg-3Zn was confirmed through X-ray diffraction and transmission electron microscopy. In addition, the dissolution behavior and chemistry was also investigated in various biological fluids by considering the effect of different ion species. Micro-tensile tests showed that the Mg-3Zn alloy electrode exhibited an enhanced yield strain and elongation in relation to a pure Mg electrode. Cell viability test revealed the high biocompatibility rate of the Mg-3Zn binary alloy thin film. Finally, the fabrication of a wireless heater demonstrated the integrability of biodegradable electrodes and highlighted the ability to prolong the lifecycle of thermotherapy-relevant electronics by enhancing the dissolution resistance of the Mg alloy.

关键词： Biodegradable alloy Mg-3Zn binary alloy Solid-solution thin film electrode Biodegradable conductor Transient electronics

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Prevalence of clonorchiasis in patients with gastrointestinal disease: A Korean nationwide multicenter survey

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World Journal of Gastroenterology 2009年第1期15卷 86-94页

作者： Ho Gak Kim Jimin Han Myung-Hwan Kim Kyu Hyun Cho Im Hee Shin Gwang Ha Kim Jae Seon Kim Jin Bong Kim Tae Nyeun Kim Tae Hyeon Kim Tae Hyo Kim Jae woo Kim Ji Kon Ryu Young-Soo Moon Jong Ho Moon Sung Jae Park chan Guk Park Sung-Jo bang chang Heon Yang Kyo-Sang Yoo Byung Moo Yoo Kyu Taek Lee Dong Ki Lee Byung Seok Lee Sang Soo Lee Seung Ok Lee woo Jin Lee chang Min Cho Young-Eun Joo Gab Jin Cheon Young woo Choi Jae Bok Chung Yong Bum Yoon Department of Internal Medicine Catholic University of Daegu School of Medicine Daegu 705-718 South Korea Department of Internal Medicine Asan Medical Center University of Ulsan College of Medicine Seoul 138-736 South Korea Department of Medical Statistics Catholic University of Daegu School of Medicine Daegu 705-718 South Korea Department of Internal Medicine Pusan National University School of Medicine Busan 602-739 South Korea Department of Internal Medicine Korea University College of Medicine Seoul 136-705 South Korea Department of Internal Medicine Hallym University College of Medicine Chuncheon 200-704 South Korea Department of Internal Medicine Yeungnam University College of Medicine Daegu 705-717 South Korea Department of Internal Medicine Wonkwang University College of Medicine Iksan Jeonbuk 570-711 South Korea Department of Internal Medicine Gyeongsang National University School of Medicine Jinju Gyeongnam 660-702 South Korea Department of Internal Medicine Yonsei University Wonju College of Medicine Wonju Gangwon 220-701 South Korea Department of Internal Medicine Seoul National University College of Medicine Seoul 110-799 South Korea Department of Internal Medicine lnje University College of Medicine Seoul 139-713 South Korea Department of Internal Medicine Soonchunhyang University College of Medicine Bucheon Gyunggi 420-767 South Korea Department of Internal Medicine Inje University College of Medicine Busan 614-735 South Korea Department of Internal Medicine Chosun University College of Medicine Gwangju Jeonbuk 501-717 South Korea Department of Internal Medicine Ulsan University Hospital University of Ulsan College of Medicine Ulsan 681-714 South Korea Department of Internal Medicine Dongguk University College of Medicine Gyeongju Gyeongbuk 791-707 South Korea Department of Internal Medicine Hallym University College of Medicine Anyang Gyeonggi 431-070 South Korea Department of Internal Medicine Ajou University School of Medicine Suwon

AIM： To investigate prevalence of C/onorchis sinensis in patients with gastrointestinal symptoms, and the relation of the infection to hepatobiliary diseases in 26 hospitals in Korea. METHODS： Consecutive patients who had been admitted to the Division of Gastroenterology with gastrointestinal symptoms were enrolled from March to April 2005. Of those who had been diagnosed with clonorchiasis, epidemiology and correlation between infection and hepatobiliary diseases were surveyed by questionnaire. RESULTS： Of 3080 patients with gastrointestinal diseases, 396 （12.9%） had clonorchiasis and 1140 patients （37.2%） had a history of eating raw freshwater fish. Of those with a history of raw freshwater fish ingestion, 238 （20.9%） patients had clonorchiasis. Cholangiocarcinoma was more prevalent in C. sinensis-infected patients than nonnfected patients [34/396 （8.6%） vs 145/2684 （5.4%）, P = 0.015]. Cholangiocarcinoma and clonorchiasis showed statistically significant positive cross-relation （P = 0.008）. Choledocholithiasis, cholecystolithiasis, cholangitis, hepatocellular carcinoma, and biliary pancreatitis did not correlate with clonorchiasis. CONCLUSION： Infection rate of clonorchiasis was still high in patients with gastrointestinal diseases in Korea, and has not decreased very much during the last two decades. Cholangiocarcinoma was related to clonorchiasis, which suggested an etiological role for the parasite.

关键词： Clonorchis sinensis Epidemiology Cholangiocarcinoma Korea Multicenter study Clonorchiasis

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P21-activated kinase 1 (PAK1)-mediated cytoskeleton rearrangement promotes SARS-CoV-2 entry and ACE2 autophagic degradation

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Signal Transduction and Targeted Therapy 2023年第11期8卷 5353-5367页

作者： Ming Liu Bingtai Lu Yue Li Shuofeng Yuan Zhen Zhuang Guangyu Li Dong Wang Liuheyi Ma Jianheng Zhu Jinglu Zhao Chris Chung-Sing chan Vincent Kwok-Man Poon Kenn Ka-Heng Chik Zhiyao Zhao Huifang Xian Jingxian Zhao Jincun Zhao Jasper Fuk-woo chan Yuxia Zhang Guangzhou Institute of Pediatrics Guangzhou Women and Children's Medical CentreState Key Laboratory of Respiratory DiseasesGuangzhou Medical University510623 GuangzhouGuangdongChina Medical Research Institute Guangdong Provincial People's Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangdongChina State Key Laboratory of Emerging Infectious Diseases Carol Yu Centre for InfectionDepartment of MicrobiologySchool of Clinical MedicineLi Ka Shing Faculty of MedineThe University of Hong KongPokfulamHong KongChina Department of Clinical Microbiology and Infection Control The University of Hong Kong Shenzhen HospitalShenzhenGuangdongChina Centre for Virology Vaccinology and TherapeuticsHong Kong Science and Technology ParkHong KongChina State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory Healththe First Affliated Hospital of Guangzhou Medical UniversityGuangzhouChina The Third Afliated Hospital of Zhengzhou University 450052 ZhengzhouChina Guangzhou Laboratory GuangzhouGuangdong ProvinceChina Chongqing International Institute for Immunology ChongqingChina

Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),the causative agent of coronavirus disease 2019(COVID-19),has had a significant impact on healthcare systems and economies *** continuous emergence of new viral strains presents a major challenge in the development of effective antiviral *** that possess broad-spectrum antiviral activities are desirable to control SARS-CoV-2 ***2,an angiotensin-containing enzyme that prevents the overactivation of the renin angiotensin system,is the receptor for ***2 interacts with the spike protein and facilitates viral attachment and entry into host ***,SARS-CoV-2 infection also promotes ACE2 *** restoring ACE2 surface expression has an impact on SARS-CoV-2 infection is yet to be ***,we show that the ACE2-spike complex is endocytosed and degraded via autophagy in a manner that depends on clathrin-mediated endocytosis and PAK1-mediated cytoskeleton *** contrast,free cellular spike protein is selectively cleaved into S1 and s2 subunits in a lysosomal-dependent ***,we show that the pan-PAK inhibitor FRAX-486 restores ACE2 surface expression and suppresses infection by different SARS-CoV-2 ***-486-treated Syrian hamsters exhibit significantly decreased lung viral load and alleviated pulmonary inflammation compared with untreated *** summary,our findings have identified novel pathways regulating viral entry,as well as therapeutic targets and candidate compounds for controlling the emerging strains of SARS-CoV-2 infection.

关键词： ACE2 inflammation rearrangement

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Suppression of innate antiviral response by severe acute respiratory syndrome coronavirus M protein is mediated through the first transmembrane domain

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Cellular & Molecular Immunology 2014年第2期11卷 141-149页

作者： Kam-Leung Siu Chi-Ping chan Kin-Hang Kok Patrick Chiu-Yat woo Dong-Yan Jin Department of Biochemistry The University of Hong Kong Pokfulam Hong Kong Department of Microbiology The University of Hong KongPokfulam Hong Kong

Coronaviruses have developed various measures to evade innate immunity, We have previously shown that severe acute respiratory syndrome （SARS） coronavirus M protein suppresses type I interferon （IFN） production by impeding the formation of functional TRAF3-containing complex. In this study, we demonstrate that the IFN-antagonizing activity is specific to SARS coronavirus M protein and is mediated through its first transmembrane domain （TM 1） located at the N terminus. M protein from human coronavirus HKU 1 does not inhibit IFN production. Whereas N-linked glycosylation of SARS coronavirus M protein has no influence on IFN antagonism, TM1 is indispensable for the suppression of IFN production. TM 1 targets SARS coronavirus M protein and heterologous proteins to the Golgi apparatus, yet Golgi localization is required but not sufficient for IFN antagonism. Mechanistically, TM 1 is capable of binding with RIG-I, TRAF3, TBK1 and IKK~, and preventing the interaction of TRAF3 with its downstream effectors. Our work defines the molecular architecture of SARS coronavirus M orotein reouired for suooression of innate antiviral re^nnn^e.

关键词： human coronavirus HKU1 innate antiviral response SARS coronavirus TRAF3 type I interferons

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Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodes

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npj Computational Materials 2021年第1期7卷 1116-1126页

作者： Sung-Min Jung Tae Hoon Lee Sang Yun bang Soo Deok Han Dong-wook Shin Sanghyo Lee Hyung woo Choi Yo-Han Suh Xiang-Bing Fan Jeong-Wan Jo Shijie Zhan Jiajie Yang Chatura Samarakoon Yoonwoo Kim Luigi GOcchipinti Gehan Amaratunga Jong Min Kim Electrical Engineering Division Department of EngineeringUniversity of CambridgeCambridgeUnited Kingdom

Quantum dot light-emitting diodes(QD-LEDs)are considered as competitive candidate for next-generation displays or *** advances in the synthesis of core/shell quantum dots(QDs)and tailoring procedures for achieving their high quantum yield have facilitated the emergence of high-performance ***,the charge-carrier dynamics in QD-LED devices,which constitutes the remaining core research area for further improvement of QD-LEDs,is,however,poorly understood ***,we propose a charge transport model in which the charge-carrier dynamics in QD-LEDs are comprehensively described by computer *** charge-carrier injection is modelled by the carrier-capturing process,while the effect of electric fields at their interfaces is *** simulated electro-optical characteristics of QD-LEDs,such as the luminance,current density and external quantum efficiency(EQE)curves with varying voltages,show excellent agreement with ***,our computational method proposed here provides a useful means for designing and optimising high-performance QD-LED devices.

关键词： quantum charge competitive

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Collision tumor of the rectum: A case report of metastatic gastric adenocarcinoma plus primary rectal adenocarcinoma

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World Journal of Gastroenterology 2006年第34期12卷 5569-5572页

作者： Young-Hoon Roh Hyoun-wook Lee Min-chan Kim Kyeong-woo Lee Mee-Sook Roh Department of Surgery Dong-A University College of Medicine Busan 602-715 South Korea Department of Pathology Dong-A University College of Medicine Busan 602-715 South Korea Department of Rehabilitation Medicine Dong-A University College of Medicine Busan 602-715 South Korea Department of Pathology Dong-A University College of Medicine Busan 602-715 South Korea Medical Research Center for Cancer Molecular Therapy Dong-A University College of Medicine Busan 602-715 South Korea

Collision tumors are thought to arise from the accidental meeting and interpenetration of two independent tumors. We report here a highly unusual case of a 61-year old man who had a unique tumor that was composed of a metastatic adenocarcinoma from the stomach to the rectum, which harbored a collision tumor of primary rectal adenocarcinoma. The clonalities of the two histologically distinct lesions of the rectal mass were confirmed by immunohistochemical and molecular analysis. Although histologic examination is the cornerstone in pathology, immunohistochemical and molecular analysis can provide evidence regarding whether tumors originate from the same clone or different clones. To the best of our knowledge, this is the fi rst reported case of such an occurrence.

关键词： Collision tumor Rectum Clonality

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Individual having a parent with early-onset gastric cancer may need screening at younger age

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World Journal of Gastroenterology 2015年第15期21卷 4592-4598页

作者： Hee-Won Kwak Il Ju Choi chan Gyoo Kim Jong Yeul Lee Soo-Jeong Cho bang wool Eom Hong Man Yoon Jungnam Joo Keun Won Ryu Young-woo Kim Center for Gastric Cancer National Cancer Center Biometric Research Branch National Cancer Center

AIM: To evaluate whether individuals with gastric cancer(GC) are diagnosed earlier if they have firstdegree relatives with ***: A total of 4282 patients diagnosed with GC at National Cancer Center Hospital from 2002 to 2012 were enrolled in this retrospective study. We classified the patients according to presence or absence of first-degree family history of GC and compared age at diagnosis and clinicopathologic characteristics. In addition, we further classified patients according to specific family member with GC(father, mother, sibling, or offspring) and compared age at GC diagnosis among these patient groups. Baseline characteristics were obtained from a prospectively collected database. Information about the family member's age at GC diagnosis was obtained by ***: A total of 924 patients(21.6%) had a firstdegree family history of GC. The mean age at GC diagnosis in patients having paternal history of GC was 54.4 ± 10.4 years and was significantly younger than in those without a first-degree family history(58.1 ± 12.0 years, P < 0.001). However, this finding was not observed in patients who had an affected mother(57.2 ± 10.0 years) or sibling(62.2 ± 9.8 years). Among patients with family member having early-onset GC(< 50 years old), mean age at diagnosis was 47.7 ± 10.3 years for those with an affected father, 48.6 ± 10.4 years for those with an affected mother, and 57.4 ± 11.5 years for those with an affected sibling. Thus, patients with a parent diagnosed before 50 years of age developed GC 10.4 or 9.5 years earlier than individuals without a family history of GC(both P <0.001).CONCLUSION: Early-onset GC before age of 50 was associated with parental history of early-onset of GC. Individual having such family history need to start screening earlier.

关键词： Gastric cancer Family history Family member Age at diagnosis Screening

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Oligomerization between BSU1 Family Members Potentiates Brassinosteroid Signaling in Arabidopsis

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Molecular Plant 2016年第1期9卷 178-181页

作者： Eun-Ji Kim Ji-Hyun Youn chan-Ho Park Tae-woo Kim Shenheng Guan Shouling Xu AlmaL. Burlingame Young-Pil Kim Seong-Ki Kim Zhi-Yong Wang Tae-Wuk Kim Research Institute for Natural Sciences Hanyang University Seoul 133-791 Korea

Brassinosteroid （BR） regulates diverse physiological and devel- opmental processes in plants （Choudhary et al., 2012）. BR binds to the receptor kinase BRI1 to trigger a phosphorylation/ dephosphorylation cascade, which includes phosphorylation of Brassinosteroid Signaling Kinase 1 （BSK1） and Constitutive Differential Growth 1 （CDG1） by BRI1, phosphorylation of BSU1 by CDG1, and dephosphorylation of BIN2 （a GSK3-1ike kinase） by BSU1 （Kim et al., 2009, 2011; Wang et al., 2014）. Almost all the downstream components of BR signaling are encoded by multiple genes of a family.

关键词： PROTEIN PHOSPHATASES REPEAT DOMAINS TRANSDUCTION KINASE

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Does the bile duct angulation affect recurrence of choledocholithiasis?

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World Journal of Gastroenterology 2011年第36期17卷 4118-4123页

作者： Dong Beom Seo Byoung wook bang Seok Jeong Don Haeng Lee Shin Goo Park Yong Sun Jeon Jung Il Lee Jin-woo Lee Division of Gastroenterology Department of Internal MedicineInha University School of MedicineIncheon 400-711South Korea Division of Gastroenterology Department of Internal Medicine and Center for Advanced Medical Education by BK21 ProjectInha University School of Medicineand Utah-Inha DDS and Advanced Therapeutics Research CenterIncheon 400-711South Korea Department of Occupational and Environmental Medicine Inha University School of MedicineIncheon 400-711South Korea Department of Radiology Inha University School of MedicineIncheon400-711South Korea

AIM:To investigate whether bile duct angulation and T-tube choledochostomy influence the recurrence of ***:We conducted a retrospective study including 259 patients who underwent endoscopic sphincterotomy and cholecystectomy for choledocholithiasis between 2000 and *** imaginary line was drawn along the center of the bile duct and each internal angle was measured at the two angulation sites ofthe bile duct *** values of both angles were added *** then tested our hypothesis by examining whether T-tube choledochostomy was performed and stone recurrence occurred by reviewing each subject's medical ***:The overall recurrence rate was 9.3% (24 of 259 patients).The mean value of sums of angles in the recurrence group was 268.3°± 29.6°,while that in the non-recurrence group was 314.8°± 19.9° (P < 0.05).Recurrence rate of the T-tube group was 15.9% (17 of 107),while that of the non T-tube group was 4.6% (7 of 152) (P < 0.05).Mean value of sums of angles after T-tube drainage was 262.5°± 24.6° and that before T-tube drainage was 298.0°± 23.9° in 22 patients (P < 0.05).CONCLUSION:The bile duct angulation and T-tube choledochostomy may be risk factors of recurrence of bile duct stones.

关键词： Choledocholithiasis Common bile duct Cholecystectomy Recurrence Endoscopic retrograde cholangio pancreatography

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Saeng-Kankunbi-Tang(生肝健脾汤) Protects Liver against Oxidative Damage through Activation of ERK/Nrf2 Pathway

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Chinese Journal of Integrative Medicine 2016年第8期22卷 619-628页

作者： In woo Lee Hee Yoon Choi Ju-Hee Lee Sun-Dong Park Seung Mo Kim Sae Kwang Ku 赵容杰 Sang chan Kim Young woo Kim Hong Sik Choi Department of Internal Oriental Medicine of Hepatology College of Oriental Medicine Daegu Haany University Daegu 38610 Korea Medical Research Center for Globalization of Herbal Formulation College of Oriental Medicine Daegu Haany University Daegu 38610 Korea College of Oriental Medicine Dongguk University Gyeongju 38066 Korea School of Mental Health Jining Medical University JiningShandong Province 272067 China

Objective： To investigate the cytoprotective effects of Saeng-kankunbi-tang（生肝健脾汤, SKT）, a herbal prescription consisting of Artemisia capillaris and Alisma canaliculatum, and its underlying mechanism involved. Methods： In mice, blood biochemistry and histopathology were assessed in carbon tetrachloride（CCl4）-induced oxidative hepatic injury in vivo. The animal groups included vehicle-treated control, CCl4, SKT 500 mg/（kg·day） CCl4＋SKT 200 or 500 mg/（kg·day）. In Hep G2 cell, tert-butyl hydroperoxide（t BHP） induced severe oxidative stress and mitochondrial dysfunction in vitro. The cyto-protective effects of SKT were determined by 3-（4,5-dimethylthiazol）-2,5-diphenyltetrazolium bromide（MTT） assay, fluorescence activated cell sorting analysis and western blotting. Results： The administration of SKT prevented liver damage induced by CCl4 in mice, by inhibition of hepatocyte degeneration and inflammatory cell infiltration as well as plasma parameters such as alanine aminotransferase（P〈0.01）. Moreover, treatment with t BHP induced hepatocyte death and cellular reactive oxygen species production in hepatocyte cell line. However, SKT pretreatment（30–300 μg/m L） reduced this cell death and oxidative stress（P〈0.01）. More importantly, SKT inhibited the ability of t BHP to induce changes in mitochondrial membrane transition in cell stained with rhodamine 123（P〈0.01）. Furthermore, treatment with SKT induced extracellular signal-regulated kinases-mediated nuclear factor erythroid-2-related factor 2（Nrf2） activation as well as the expressions of heme oxygenase 1 and glutamate-cystein ligase catalytic, Nrf2 target genes. Conclusion： SKT has the ability to protect hepatocyte against oxidative stress and mitochondrial damage mediated by Nrf2 activation.

关键词： Saeng-kankunbi-tang mitochondria nuclear factor erythroid-2-related factor 2 oxidative stress liver mouse

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