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  • Chloroplast Evolution Revealed by Research on Photosynthetic Amoeba

    Biological Sciences Prof. YOON, HWAN SU

    Chloroplast Evolution Revealed by Research on Photosynthetic Amoeba

    A research team led by Prof. Hwan Su Yoon (Department of Biological Sciences at Sungkyunkwan University), together with the research team of Prof. Bhattacharya published a paper on the evolutionary process of chloroplasts in the photosynthetic amoebae, Paulinella micropora. Chloroplasts are the powerhouses of many aquatic and terrestrial ecosystems. The chloroplast in algae and plants originated more than 1 billion years ago and therefore offers limited insights into the initial stages of chloroplast evolution. To address this issue, we focused on the photosynthetic amoeba Paulinella micropora that acquired chloroplast recently (∼124 million years ago) from the independent cyanobacterial origin. Paulinella genome revealed how foreign genes from cyanobacteria and other bacteria affected during the evolution of the chloroplast. In plant cells, proteins involved in photosynthesis are targeted to the chloroplast. Short amino acid sequences called signal peptides are involved in this process. The research team discovered a unique chloroplast signal peptide in Paulinella, which has a plant-independent origin. Moreover, most of the chloroplast targeted proteins were originated from amoeba host, suggesting dominant host contribution to chloroplast evolution. As a model organism showing what happened in the early evolution process of plants, the research on photosynthetic Paulinella is important. Paulinella genome information can be used as basic data for research on applied fields such as synthetic biology and genetic engineering that maximize photosynthesis efficiency. [Image] photosynthetic Paulinella Published article: Duckhyun Lhee, JunMo Lee, Khaoula Ettahi, Chung Hyun Cho, Ji-San Ha, Ya-Fan Chan, Udi Zelzion, Timothy G Stephens, Dana C Price, Arwa Gabr, Eva C M Nowack, Debashish Bhattacharya, Hwan Su Yoon, Amoeba Genome Reveals Dominant Host Contribution to Plastid Endosymbiosis, Molecular Biology and Evolution, Volume 38, Issue 2, February 2021, Pages 344–357, https://doi.org/10.1093/molbev/msaa206

  • Suggests Possibility of Applicable Personalized Cancer Therapy Using Radiation Therapy

    Integrative Biotechnology Prof. JEON, YOUNG-JUN

    Suggests Possibility of Applicable Personalized Cancer Therapy Using Radiation Therapy

    - The current study shows that the mutations in KEAP1/NFE2L2 genes have a power to predict for local recurrence of the patients after radiation therapy. - The resistance evoked by these mutations may allow personalized radiosensitization of KEAP1/NFE2L2-driven NSCLC, suggesting that the concept of the cancer personalization could be extended to radiation therapeutics. Figure 1. Schematic diagram showing the study design about which the KEAP1/NFE2L2 mutations are predictive biomarkers of local recurrence after radiation treatment in NSCLC Image Excepted : Cancer Discovery DOI:10.1158/2159-8290.CD-20-0282 Young-Jun Jeon’s research teams in the department of Integrative Biotechnology, Sungkyunkwan university published that the mutations in KEAP1/NFE2L2 gene could predict local recurrence of the NSCLC patients after radiation therapy. This study was done by collaboration with Stanford University and supported by NRF grant (NRF-2020R1F1A1071579). Personalized cancer therapy has not been routinely applied to the cancer patients using radiation therapy. To this end, the teams analyzed 232 consecutive patients with localized NSCLC using next generation sequencing (NGS) analysis and found that an important anti-oxidant responsible factor, KEAP1/NFE2L2 genes harboring oncogenic mutations were highly correlated with the local recurrence of NSCLC patients after radiation therapy but not surgery. Subsequently they generated CRISPR-knocked out lung cancer cell lines for KEAP1 genes to test whether a patient derived-KEAP1 or NFE2L2 mutation has oncogenic property and found the pathogenic mutations of the critical anti-oxidant responsible genes are associated with radiation resistance. Also, subsequent cell biological approaches revealed that the inhibition of glutamine metabolic pathway known as an addicted pathway in lung cancer may allow personalized re-sensitizing KEAP1/NFE2L2-driven NSCLC. Figure 2. Strategy for assessing KEAP1/NFE2L2 mutation functional classification using isogenic lung cancer cell lines This study not only claimed the cancer personalization applicable to treatment strategy with radiation therapy in other localized cancers but also suggest a new paradigm in the personalized cancer therapeutics. These results featured on the cover in Cancer Discovery (Vol 10, Issue 12), a top ranked journal in the fields of Oncology (Impact factor – 29.497). Young-Jun Jeon’s research team is currently developing a NGS library platform to analyze circulating tumor nucleic acids from patient blood plasma as a liquid biopsy tool, which will be eventually applied to identify novel mechanistic and prognostic biomarkers by combining cancer biological approaches.

  • Development of highly efficient and long-lasting electrocatalyst for water oxidation

    Chemistry Prof. LEE, HYOYOUNG

    Development of highly efficient and long-lasting electrocatalyst for water oxidation

    Abundant. Clean. Flexible. Alluring enough to explain why hydrogen, the most common molecule in the universe happens to have its name as part of an national Hydrogen and Fuel Cell Day. Chosen to signify hydrogen's atomic weight of 1.008, the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy celebrates advances in hydrogen-use technology every October 8 since 2015. When hydrogen is consumed in a fuel cell (which takes the water molecule H2O and seperates it into oxygen and hydrogen, a process called electrolysis), it only produces water, electricity, and heat. As a zero-carbon energy source, the range of its potential use is limitless: transportation, commercial, industrial, residential, and portable. While traditional hydrogen production processes required fossil fuels or CO2, electrolysis produces “green hydrogen” from water molecules. Since water cannot be split into hydrogen and oxygen by itself, the electrochemical hydrogen-water conversion needs highly active electrocatalysts. The conventional water electrolysis, however, faces technological challenges to improve the efficiency of the water-splitting reaction for the sluggish oxygen evolution reaction. Noble metal-based ruthenium oxide (RuO2) and iridium oxide (IrO2) are used to enhance the oxygen generation rate. However, these noble metal catalysts are very expensive and show poor stability under long-term operation. Led by Associate Director LEE Hyoyoung of the Center for Integrated Nanostructure Physics within the Institute for Basic Science (IBS) located at Sungkyunkwan University, the IBS research team developed a highly efficient and long-lasting electrocatalyst for water oxidation using cobalt, iron, and a minimal amount of ruthenium. “We used ‘amphiphilic block copolymers’ to control electrostatic attraction in our single ruthenium (Ru) atom-bimetallic alloy. The copolymers facilitate the synthesis of spherical clusters of hydrocarbon molecules whose soluble and insoluble segments form the core and shell. In this study, their tendency for a unique chemical structure allows the synthesis of the “high-performance” single atomic Ru alloy present atop the stable cobalt iron (Co-Fe) metallic composite surrounded by porous, defective and graphitic carbon shell,” says LEE Jinsun and Kumar Ashwani, the co-first authors of the study. “We were very excited to discover that pre-adsorbed surface oxygen on the Co-Fe alloy surface, absorbed during the synthesis process, stabilizes one of the important intermediates (OOH*) during the oxygen generation reaction, boosting the overall efficiency of the catalytic reaction. The pre-absorbed surface oxygen has been of little interest until our finding,” notes Associate Director Lee, the corresponding author of the study. The researchers found that four hour-annealing at 750°C in an argon atmosphere is the best appropriate condition for the oxygen generating process. In addition to the reaction-friendly environment on the host metal surface, the single Ru atom, where oxygen generation takes place, also fulfills its role by lowering the energy barrier, synergistically enhancing the efficiency of oxygen evolution. The research team evaluated the catalytic efficiency with the overvoltage metrics needed for the oxygen evolution reaction. The advanced noble electrocatalyst required only 180 mV (millivolt) overvoltage to attain a current density of 10 mA (milliampere) per cm2 of catalyst, while ruthenium oxide needed 298 mV. In addition, the single Ru atom-bimetallic alloy showed long-term stability for 100 hours without any change of structure. Furthermore, the cobalt and iron alloy with graphitic carbon also compensated electrical conductivity and enhanced the oxygen evolution rate. Associate Director Lee explains, “This study takes us a step closer to a carbon-free, and green hydrogen economy. This highly efficient and inexpensive oxygen generation electro-catalyst will help us overcome long-term challenges of the fossil fuel refining process: to produce high-purity hydrogen for commercial applications at a low price and in an eco-friendly manner.” The study was published online on November 4 in the journal Energy & Environmental Science. [Image 1] Crystal structure of surface oxygen-rich metal alloy (top left). Oxygen and hydrogen are generated during a water electrolysis reaction (top right). The designed catalyst exhibits the best oxygen evolution activity with minimal overpotential (bottom panels). - References Jinsun Lee, Ashwani Kumar, Taehun Yang, Xinghui Liu, Amol R. Jadhav, G. Hwan Park, Yosep Hwang, Jianmin Yu, Chau T. K. Nguyen, Yang Liu, Sara Ajmal, Min Gyu Kim and Hyoyoung Lee. Stabilizing OOH* intermediate via pre-adsorbed surface oxygen of single Ru atom-bimetallic alloy for ultralow overpotential oxygen generation. Energy & Environmental Science. 2020. DOI: 10.1039/D0EE03183F

  • Suggests the Possibility of Diagnosing Chronic Pain through Neuroimaging

    Biomedical Engineering Prof. WOO, CHOONG-WAN

    Suggests the Possibility of Diagnosing Chronic Pain through Neuroimaging

    Pain is subjective, by definition. No onecan truly experience the others’ pain. Though the need for objective markers ofpain is pressing to help develop more effective diagnosis and treatments, the currentstate-of-the-art pain evaluation method is still self-report by asking patients“how much pain do you feel now?” Pain can be initiated by externalnociceptive input, but multiple factors can influence and modify painexperience, such as emotions, thoughts, beliefs and past memories, andtherefore complex interactions among multiple brain system (a.k.a., functionalconnectome*) are known to be important for pain. Chronic pain, which ruinseveryday life and causes tremendous socio-economic costs, is also known to be adisease of functional brain connectome. However, there has been no objectiveassessment of pain based on the functional brain connectome. * Functional brain connectome: A map ofsystems-level functional interactions across multiple brain regions A new study conducted by a research team ofSungkyunkwan University led by Choong-Wan Woo (Assistant professor, Departmentof Biomedical Engineering) developed a new neuroimaging biomarker of sustainedpain based on functional brain connectome in collaboration with Tor Wager(Professor, Department of Psychological and Brain Sciences) at Dartmouth College.The research team invented an effective and safe way to induce pain for a while(longer than 10 minutes) by applying capsaicin on participants’ tongue. Theyrecorded patterns of brain functional connectivity while participants wereexperiencing sustained pain using functional Magnetic Resonance Imaging (fMRI).The functional connectome-based biomarker not only succeeded to predictsubjective ratings of pain intensity across 109 participants, but it also predictedoverall severity of pain symptoms across 192 patients with clinical back pain. “This study showed brain responses to experimentallyinduced sustained pain are quite similar to the brain activity patterns during clinicalpain”, said Professor Choong-Wan Woo, who is the corresponding author of thiswork. He added, “We believe this study provide new insight into understandingneural mechanisms of clinical pain, and ultimately can help many patientssuffering from chronic pain”, “Our results suggest that not only a set oflocal brain regions known to be related with pain but also the dynamic,functional interactions of whole brain are important for understanding theneural mechanisms of sustained pain” said Jae-Joong Lee, the first author ofthe study and a Ph.D. candidate in the Department of Biomedical Engineering,Sungkyunkwan University. He also added “This is a new evidence that pain is amulti-dimensional experience mediated by functional brain connectome.” This study was supported by Institute forBasic Science (IBS-R015-D1), National Research Foundation of Korea (2019R1C1C1004512),Ministry of Science and ICT, Korea (2019-0-01367-BabyMind), and Korean BrainResearch Institute (18-BR-03). The paper has published in Nature Medicine(Impact Factor 36.130) on Jan 4, Monday. ※ You can find its video abstract via thefollowing YouTube link: https://youtu.be/U_Y7vwGw5So [Figure 1] A functional connectome biomarkerpredictive of sustained pain intensity, named the Tonic Pain Signature (ToPS).Each line represents predictive weights of functional interactions between twodistinct brain regions in the biomarker model. [Figure 2] Selected connections of the functionalconnectome biomarker that are most import in prediction of sustained painintensity.

  • Revealing a Clue to the Solution of the Final Piece of the Puzzle Towards Commercialization of Perovskite Optoelectronic

    SKKU Advanced Institute of Nano Technology Prof. LEE, JIN WOOK

    Revealing a Clue to the Solution of the Final Piece of the Puzzle Towards Commercialization of Perovskite Optoelectronic

    Prof. Jin-Wook Lee's research team at SKKU Advanced Nano Technology (SAINT) and Department of Nano Engineering has published significant research results to uncover the final piece of the puzzle for the commercialization of perovskite optoelectronic devices. The four research papers associated with it were published in Nature Communications, Advanced Functional Materials, Journal of the American Chemical Society, and Joule (impact index=29.155), the top 2% journal in the material research field. Optoelectronic devices based on metal halide perovskite materials exhibit performance comparable to those of the commercialized devices, undertaken to be commercialized by domestic and overseas research institutes and companies. In particular, perovskite solar cells are in the limelight as a next-generation solar cell due to power conversion efficiency exceeding 25%, approaching that of previously commercialized silicon solar cells, and are expected to be much economical in manufacturing cost aspect. The final puzzle for the commercialization of perovskite devices regarding the current issue is the suppression and passivation of crystal defects to improve device lifetime. Low-temperature solution-processed perovskite thin films inevitably possess a high density of ionic defects. These ionic defects are easily migrated under built-in or applied electric field during device operation, degrading the charge transport ability, which ultimately fatal to the device lifetime. Prof. Jin-wook Lee's research team developed core technologies to dramatically reduce the defect concentration in the perovskite thin-film by applying a solid-phase epitaxial crystal growth method (Nat. Commun., 2020, 11, 5514) and developed a method to effectively passivate defects in the grown thin film without side effects. (Joule, 2020, 4, 2426; Adv. Funct. Mater., 2020, 2007520; J. Am. Chem.Soc. 2020, 142, 20071). The solar cell and LED devices based on thetechnologies showed superior performance and lifetime compared to control devices. These technologies developed by Professor Jin-wook Lee's research team not only suggested important scientific clues to resolve the instability issue of perovskite photoelectric devices but are also expected to become source proprietary technologies for the commercialization of perovskite optoelectronic devices in the future. ※Related publications 1)Shallow iodine defects accelerate the degradation of α-phase formamidinium perovskite, Joule, 2020, 4, 2426. (Corresponding author- Prof.Jin-Wook Lee) 2)Solid-phase hetero epitaxial growth of α-phase formamidinium perovskite, Nature Communications, 2020, 11, 5514. (First author and corresponding author-Prof. Jin-Wook Lee) 3)Stable and efficient methylammonium, cesium, and bromide-free perovskite solarcells by in-situ interlayer formation, Advanced Functional Materials,2020, 2007520. (Corresponding author- Prof. Jin-Wook Lee) 4)Molecular interaction regulates performance and longevity of defect passivation for metal halide perovskite solar cells, Journal of the American ChemicalSociety, 2020, 142, 20071. (Corresponding author- Prof. Jin-Wook Lee) Schematic illustration: growth of perovskite thin film by solid-phase epitaxiay (a) Schematic diagram of a solid-phase epitaxy method using a controlled phase conversion. (b) Comparison of phase conversion kinetics between conventional thin film growth and epitaxial growth methods. (c, d) X-ray diffraction patterns (XRD) and photoluminescence (PL) lifetime of the films grown by a conventional method and nano-heteroepitaxial (NHE) growth method.

  • Development of the World's First Fluorescence Amplifier Sensor for Detection of Nitroaromatic Compounds

    Pharmacy Prof. KIM, IN SU

    Development of the World's First Fluorescence Amplifier Sensor for Detection of Nitroaromatic Compounds

    A research team led by Professor In Su Kim from the School of Pharmacy, Sungkyunkwan University (President: Dong Ryeol Shin); Professor Jung Su Park from the School of Chemistry, Sookmyung Women’s University and Professor Jonathan L. Sessler from the School of Chemistry, University of Texas, Austin, U.S. developed the world's first ratiometric fluorescence amplification sensor that can selectively detect nitro-explosive compounds. The findings were selected as a cover page in the October issue of the online edition of Journal of the American Chemical Society (IF = 14.612), a world-renowned journal in the field of chemistry. Nitroaromatic compounds are known to be explosive substances that react vigorously, releasing toxic gases in the atmosphere. Typical explosive substances as trinitrotoluene (TNT) and nitromethane are currently being used as basic raw materials for the manufacture of explosives, including gunpowder. Nitroaromatic compounds are also part of pharmaceutical manufacturing processes of several APIs such as nifedipine, sildenafil (Viagra) etc. Such class of compounds require special attention while handling as they may cause explosion as a result of heat or impact. In this study, Professor In Su Kim's research team and collaborators developed the world's first fluorescence amplifier sensor that can selectively adopt various nitroaromatic compounds by fluorescence indicator displacement assay method depending on binding affinities. In particular, a method was proposed to detect identifiable rate-measurable wavelength changes depending on the type of nitro-compound. Previously reported nitroaromatic sensors rely on fluorescence quenching technique with a simple reduction in luminescence intensity. Lower sensitivity, lack of selectivity and false positives are perceived as major drawbacks related to the previously known sensors as compared to the fluorescence amplification sensors. Professor In Su Kim said, "This study resulted in the development of a new technology that can selectively detect explosive nitro-compounds, especially fluorescence amplification can be visually identified and this technology can be used to develop small explosive detection sensors, that are easy to carry, in the future." This research was conducted with financial support from the National Research Foundation of Korea and the Ministry of Science and ICT (MSIT). Picture Description < Picture Description > First Figure: When NACs (nitroaromatic explosive compounds) are added to a supramolecular structure comprising a large organic molecule (Bz-TTF-C4P) and a fluorescent rylene dye molecule (PDI, perylenediimide); the giant complex selectively recognize NACs, forming supramolecular assembly and subsequently emitting fluorescence. Second Figure: A schematic representation that suggests, fluorescence can be detected using well-known RH-6G (rhodamine-6G) as the fluorescent chemical compound through similar reaction. < Illustration of cover page for the October issue of JACS > < Term Description > Ratiometric: A method for measuring intensities of emission spectra by utilizing two or more wavelengths to detect changes to local environment. This is usually measured by using special sensors that are sensitive to certain environmental parameters such as; pH, polarity, viscosity, or ion concentration. Fluorescence amplification: It is a technique to measure the amplification of the fluorescence signals released by the fluorescent group by utilizing the fluorescence colorimetric unit. Trinitrotoluene (TNT, 2,4,6-trinitrotoluene): Organic aromatic compound containing three nitro groups, which is used as reference material to compare the strength of bombs and explosives.

  • Research team led by Professor In-Su Kim at School of Pharmacy, Sungkyunkwan University proposes signals for developing

    Pharmacy Prof. KIM, IN SU

    Research team led by Professor In-Su Kim at School of Pharmacy, Sungkyunkwan University proposes signals for developing

    A research team led by Professor In-Su Kim at the School of Pharmacy of Sungkyunkwan University (President: Dong-Ryeol Shin) has developed a synthetic methodology to selectively transform nucleoside analogs, known as the core structure of antiviral drugs. The findings were published in the September issue of the online edition of Angewandte Chemie (IF = 12.959), a world-renowned journal in the field of chemistry. A nucleoside analog is a compound that is designed with an aim to resemble a structural unit of DNA or RNA by modifying the sugar or base which are the basic units of DNA and RNA. Nucleoside analogs because of their inherent characteristics could be absorbed into viral cells and control genomic synthesis and so could be used as an antiviral drug. So far, more than 20 nucleoside analogs have been used to treat various viral infections such as Herpes (HSV), AIDS (HIV), and hepatitis B/C (HBV/HCV). In particular, Remdesivir, which is in the spotlight as new COVID-19 treatment, is also known to contain a nucleoside analog. In this study, Professor In-Su Kim's research team developed the first synthetic method for selective alkylation of a nucleobase in nucleoside analogue by utilizing easily available sulfur ylide. Previously reported alkylation methods of nucleobase require organic solvents and complex processes involving multiple steps with low chemical reactivity, in turn, resulting in additional production costs and limitations for application in the pharmaceutical industry. Sulfur ylide is a reagent developed in 1960 by Nobel Prize-winning professor E. J. Corey, which has been used only in the manufacture of trigonal cyclic compounds. Professor In-Su Kim's research team has created an opportunity to showcase the importance of sulfur ylide as an effective reagent to alkylate nucleoside analogs. In this developed synthetic method water or alcohol is used as a reaction solvent that is considered as environmentally green and also largely reduce the production cost. Professor In-Su Kim said, "The results are new discovery of the reactivity of sulfur ylides for direct functionalization of carbon-hydrogen bonds. In particular, this study has presented a new signal to aid the development of antiviral drugs for human suffering from the new viral infection, and can drastically improve the manufacturing method for nucleoside alkylation compared to the existing multi-stage synthetic process." This research was conducted with financial support from the National Research Foundation of Korea and the Ministry of Science and ICT (MSIT). < Picture Description > Graphic above the green line: A reaction scheme indicating the reaction of nucleoside with sulfur ylide and carbon-hydrogen bond in nucleoside analog to be replaced with an alkyl. Graphic below green: The reaction of Pyrazinones and Azaracils with sulfur ylide in water or alcohol as solvent does not result in the known cyclic trigonal compounds, but rather brings about alkylation of C˗H bond. Reaction mechanism by path a is suggested by Nobel Prize-winner Professor Corey, and reaction mechanism by path b is the result of the current research. External environmental factors such as substrates, reagents, solvent and temperature are very important to control the reaction pathways a and b. The description in front of the four bullet points summarizes the originality and excellence of the current research work. < Term Description > Nucleoside analogues: organic compounds that transforms the phosphoric acid, sugar, and base of DNA and RNA to make it structurally similar to DNA or RNA. Nucleobase: nitrogen-containing biological compounds that form nucleosides, which, in turn, are components of nucleotides, with all of these monomers constituting the basic building blocks of nucleic acids. The five nucleobases of adenine (A), guanine (G), cytosine (C), thymine (T), and uracil (U) are called primary or canonical. Sulfur ylides: organic compounds containing negatively charged atoms (carbon anions) within molecules, and negatively charged carbon elements are directly coupled with heterocarbons (sulfur, phosphorus, or nitrogen) that have positive transmission. Alkylation: organic synthesis that introduces alkyl groups through substitution or addition reactions to organic compounds.

  • Trauma, Disaster Psychological Support, and  The Influence of Coronavirus Disease 19(COVID-19) Pademic on Public's Psych

    Education Prof. LEE, DONGHUN

    Trauma, Disaster Psychological Support, and The Influence of Coronavirus Disease 19(COVID-19) Pademic on Public's Psych

    There is always a danger of potential disaster in our lives. Natural disasters such as earthquakes, typhoons, and tsunami, as well as social disasters increasing as human civilization develops, are threatening our lives. Recently, we even have experienced a virus pandemic that we never imagined before. These disasters can cause material and economic damage such as loss of life, property, and job, as well as social and psychological dysfunction for the disaster victims by remaining as threatening events that shake up one’s life. Since the research team led by Professor Dong Hun Lee of the Department of Education had conducted the R&D of the Ministry of Security and Public Administration from 2014 to 2016, the team has continuously made efforts to study the psychological and social effects of large-scale disasters on people and to establish national-level psychological support measures. [1] ‘OMEGA - Journal of Death and Dying‘(SSCI), August 9, 2020 “A Longitudinal Perspective on Bereaved Parent’s Changes in Life Experience” (Yewon Kim, DongHun Lee, HongJin Jeon) • Individuals who experienced traumatic events may experience extreme psychological pain and fear, with losing their prediction and control of their own lives, especially a feeling of changes in themselves. • According to the study, parents who lost their child to disasters not only experience more powerful and continuous grief and mental health difficulties than other kinds of loss experiences, but also may not recover from the negative effects of grief for a long time. The study suggests that psychological supports for victims of disasters need to be continued to the years beyond the early stages of the incidents. [2] The Influence of Public's Fear, and Psycho-social Experiences during Coronavirus Disease 19(COVID-19) Pandemic on Depression, Anxiety in South Korea, The Korean Journal of Counseling and Psychotherapy 2020, 32(4), In Press, (Lee, DongHun, Kim, YeJin, Lee, DeokHee, Hwang HeeHun, Nam, Seulji, Kim, Ji Yun) • The research team led by Prof. Lee, who published a paper titled <‘The Emotional Distress and Fear of Contagion Related to Middle East Respiratory Syndrome(MERS) on General Public in Korea’ (Dong Hun Lee, Ji-Yun Kim, Hyun-Suk Kang)> (in Korean Journal of Psychology: General in 2016), tried to examine the psychological and social effects of infectious social disasters such as coronavirus on the general public and find out the various causes of new infectious diseases affecting the public's negative psychological experiences. • In this study, infectious diseases such as MERS, SARS, and Influenza A (H1N1) have continuously occurred in South Korea, but it is revealed that "technical disease control" and "emotional guard" should be combined to reduce fear, anxiety and depression of the general public. In addition, since it is impossible to prevent the influx of new infectious diseases and these diseases can occur again at any time, it is important to establish a national-level psychological support plan to cope with future infectious social disasters. ※ Reference - Study on COVID-19 1. Donga https://www.donga.com/news/It/article/all/20200908/102839839/1 2. Yonhapnewstv https://www.yonhapnewstv.co.kr/news/MYH20200906003600038 https://www.yna.co.kr/view/AKR20200905044100004 3. Maeil Business Newspaper https://www.mk.co.kr/news/society/view/2020/09/918328/ - Study on MERS 1. https://news.joins.com/article/23720342 [Original Article: JoongAng Daily] suffering from panic due to stress of coronavirus ... ‘mental prevention’ desperately needed in Daegu 2. http://biz.heraldcorp.com/view.php?ud=20160714000138 The Korea Herald

  • Prof. Chun Gwon Park (GBME) develops treatment for severe coronavirus infection-19 and sepsis using nanotechnology

    Biomedical Engineering Prof. PARK, CHUN GWON

    Prof. Chun Gwon Park (GBME) develops treatment for severe coronavirus infection-19 and sepsis using nanotechnology

    A research team led by Prof. Chun Gwon Park (Department of Biomedical Engineering at Sungkyunkwan University), together with the research teams of Dr. Wonhwa Lee (Korea Research Institute of Biomedical Engineering), Prof. Jun hong Ahn (Yeongnam University Hospital), Prof. Hee ho Park (Kangwon University), and Prof. Woo ram Park (Catholic University) discovered a biomarker that can determine the severity of COVID19 and sepsis patient, and developed a nanomaterial-based general-purpose therapeutic candidate using the found biomarker. In 2020, the global COVID19 epidemic including Korea has caused more than 32 million infections and over 1 million deaths to date. Corona 19 infection causes an over-inflammatory reaction, leading to local and systemic tissue damage, as well as complications such as severe progressive pneumonia, acute respiratory syndrome and sepsis in mild respiratory diseases. Currently, there is no vaccine or clear treatment against the coronavirus, and there is no biomarker to predict patients who are seriously deteriorating or dying by severe diseases. Prof. Park and his colleagues found that NETosis - a process in which cells are killed due to an over-inflammatory reaction caused by abnormally activated neutrophils and causes several complications such as sepsis - related factors in the blood of patients with severe coronavirus was expressed significantly higher than those of normal and mild COVID-19 patients. It was confirmed that the concentration of DNase-I in the body that can inhibit NETosis was very low. Prof. Park’s research team focused on the excellent biocompatibility and adhesion properties of 'melanin', the main component of squid ink, and produced nanoparticles that can circulate in the blood for a long time. The biomolecule DNase-I that degraded DNA, the main component of NETosis, was coated on the surface of melanin nanoparticles to inhibit NETosis and to produce biocompatible melanin nanoparticles coated with DNase-I, which can exert therapeutic effects for a long time. Prof. Park’s research team confirmed that DNase-I-coated biocompatible melanin nanoparticles maintained their drug efficacy for a long time in the blood. Administration of DNase-I-coated biocompatible melanin nanoparticles in blood samples of severe coronavirus patients and sepsis animal models showed a meaningful difference compared to the administration of DNase-I alone, and it was confirmed that by suppressing NETosis, the hyperinflammatory response was lowered to alleviate systemic inflammation and lower mortality. Through this, the biocompatible melanin nanoparticles coated with DNase-I can help prevent the progression of acute respiratory syndrome, pneumonia, and sepsis by inhibiting NETosis in severe coronavirus patients, and can have a great effect on coronavirus treatment. Prof. Park’s research team revealed that it is a future plan to develop and apply the developed DNase-I-coated biocompatible melanin nano-therapeutic drug into a new nanoparticle-based drug that can potentially treat the symptoms of coronavirus infection. Published article: Park, H. H., Park, W., Lee, Y. Y., Kim, H., Seo, H. S., Choi, D. W., Kwon, H.-K., Na, D. H., Kim, T.-H., Choy, Y. B., Ahn, J. H.,* Lee, W.,* Park, C. G.*, Bioinspired DNase-I-coated melanin-like nanospheres for modulation of infection-associated NETosis dysregulation, Advanced Science, accepted, 2020 [Image] Diagram of bio-applied and melanin nanoparticles coated with DNase-I production

  • Established the Occurrence Causes of Unmet Medical Care in Patients with Benign Prostatic Hyperplasia

    Medicine Prof. LEE, KYU SUNG ·Prof. Munjae Lee (Department of Medical Device Management and Research)

    Established the Occurrence Causes of Unmet Medical Care in Patients with Benign Prostatic Hyperplasia

    - Need to induce early treatment and prevention of benign prostatic hyperplasia centered on primary medical cares - Suggested that the unmet medical care could be resolved by using ICT-based medical devices and caring robots through the convergence research A paper on the unmet medical care in patients with benign prostatic hyperplasia was published online in the world-renowned academic journal, the "Journal of Clinical Medicine", on March 25 (Wed), which has been jointly studied by Professor Lee Munjae’s research team in the Department of Medical Device Management and Research, SAIHST (Samsung Advanced Institute for Health Sciences & Technology); Professor Lee Kyu-Sung’s research team in the Department of Urology, Samsung Seoul Hospital; and Professor Choi Mankyu's research team at Korea University. Even though not a life-threatening disease, benign prostatic hyperplasia is one of the diseases that may lower the quality of life by bringing about discomfort in daily life due to symptoms, such as urination disorder, etc. In terms of benign prostatic hyperplasia, one of the geriatric diseases, its prevalence has been increasing due to the recently increased patients with metabolic syndrome, such as obesity, diabetes, and hypertension. However, considering this as a process of aging or as a temporary symptom, the unmet medical experience of the patients with benign prostatic hyperplasia tends to increase now because they cannot receive medical services in time. The research team used Andersen's Behavioral Model to analyze the factors of the unmet medical care of patients with benign prostatic hyperplasia. The Andersen's Behavioral Model has been also used in the unmet medical research as it can analyze the predictive factors in using medical services and measure factors influencing medical use. The Andersen's Behavioral Model is categorizing the factors related to the use of medical care services into predisposing factors, possible factors, and necessary factors. Although multiple studies have been conducted on the unmet medical care, there has been no research to establish the fundamental causes inducing the unmet medical care in patients with benign prostatic hyperplasia. Accordingly, the research team investigated and revealed the causes of unmet medical care in patients with benign prostatic hyperplasia, then conducting a study on the measures to effectively manage the patient. According to research findings, in the Andersen's Behavioral Model, age and education level influenced the unmet medical care in predisposing factors, and the medical security type affected it in possible factors. In addition, as for necessary factors, it was found that the sick-in-bed experience had an impact on the unmet medical care of patients with benign prostatic hyperplasia. In other words, it could be seen that relatively younger patients had more unmet medical care experience and patients with the higher the educational level had less unmet medical care experience. Furthermore, for the patients who had benefits from the health insurance, the experience of unmet medical care decreased; the patients lying in bed had more unmet medical care experience. Based on these findings, in order to reduce the unmet medical care experience of patients with benign prostatic hyperplasia, the research team identified that it is necessary to lead the patients to be treated in early stages when symptoms are detected, by providing accurate information about the disease in advance. In addition, they stressed that efforts in the policy to emphasize the importance of prevention and early diagnosis are needed for the disease, like benign prostatic hyperplasia, related to which there are many cases that patients themselves may ignore their own health problems. Particularly, the research team tried to resolve the unmet medical care from a new perspective – through the convergence research of clinic, health sciences, etc. Research Professor Lee Munjae, the lead author of this paper, remarked, “For education on prevention and early diagnosis, the use of primary care is necessary, and it is expected that continuous management of diseases will be conducted through a community care project centered on the primary medical care”, and then stated “Especially in the case of patients with benign prostatic hyperplasia giving a restriction on their physical activity, if medical care services would be provided by utilizing ICT-based medical devices, caring robots, and so on, the unmet medical care could be resolved.” This work was supported by the Ministry of Education of the Republic of Korea and the National Research Foundation of Korea (NRF-2019S1A5A2A03040304). ※ Paper title: Unmet Medical Needs of Patients with Benign Prostate Enlargement ※ Paper source: https://www.mdpi.com/673294

  • Development of a Sticker-like Stretchable Artificial Neural Electronic Epineurium for Peripheral Neuroprosthetics

    Electronic and Electrical Engineering Prof. SON, DONG HEE

    Development of a Sticker-like Stretchable Artificial Neural Electronic Epineurium for Peripheral Neuroprosthetics

    Conventional Cuff-type peripheral nerve interfacing devices have been applied to neuroprosthetic systems to measure neural signals and deliver the programmed electric pulses to the nerves. However, when implanted to the nerve chronically, mechanical mismatch between neural device and tissue induces the formation of an abnormal amount of fibrous tissue on the peripheral nerve, resulting in nerve compression. The long-term compression leads to lethal nerve necrosis. Micro-neurosurgery is also the time-consuming task. These issues remain challenging. To overcome the limitation, Prof. Donghee Son played a major role in leading SKKU-KIST research team gave an idea for realizing mechanically adaptive peripheral neural interfaces using intrinsically stretchable and autonomously self-healing materials. In continuing effort to optimize their individual performances, SKKU-KIST research team developed “Adaptive Self-healing Electronic Epineurium” as a promising candidate for clinic-grade chronic neural interfaces (Figure 1). SKKU-KIST research team addressed that the self-healing property of electronic epineurium allows surgeons to implant the neural interfaces efficiently while reducing operation time even without causing sequela (Figure 2). Additionally, dynamic stress relaxation of electronic epineurium prevents nerve compression chronically, resulting in reliable neural recording and stimulation. After implanting electronic epineurium into sciatic nerve of a rat, SKKU-KIST research team successfully recorded sensory neural signals for 14 weeks while applying mechanical stimuli to rat’s sole. In addition to monitoring of neural signals, electrical stimulation was reliably delivered to rat’s sciatic nerve without causing nerve fatigue. Using electronic epineurium, the team demonstrated a nerve-to-nerve interface to bypass the damaged spinal cord. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1C1C1005567). This work was also supported by Institute of Information & communications Technology Planning & Evaluation (IITP) grant funded by the Korea government (MSIT) (No.S-2020-1443-000, Development of low power/low delay/self-power suppliable RF simultaneous information and power transfer system and stretchable electronic epineurium for wireless nerve bypass implementation). This research was also supported by KIST intramural grants (2E30341, 2E29680, 2E29300). This research was also supported by the National Research Council of Science & Technology grant by the Korea government (MSIT) (No. CAP-18-01-KIST). This research is published on world-renowned International journal, Nature Communications, on August 21, 2020. * Title: Adaptive self-healing electronic epineurium for chronic bidirectional neural interfaces Professor Son Dong-hee explained the significance of the research, saying, "This research result has developed a new paradigm that can overcome the limitations of the existing neuroprosthetics field, and has opened the possibility of implementing smart electronic medicine for the rehabilitation of the human nervous system. It is also expected to be the foundation of robot or artificial neural networking technology for prothetic in the future.” Figure 1 Electronic epineurium implanted to sciatic nerve of a rat Figure 2 Mechanical adaptability of self-healing electronic epineurium Figure 3 Long-term neural recording and stimulation

  • Use of Nonsteroidal Anti-inflammatory Drug Worsens Clinical Outcomes for the COVID-19 Patients

    Pharmacy Prof. SHIN, JU-YOUNG ·Researcher Han Eol Jeong, Researcher Hyesung Lee

    Use of Nonsteroidal Anti-inflammatory Drug Worsens Clinical Outcomes for the COVID-19 Patients

    The research team led by professor Ju-Young Shin, together with researchers Han Eol Jeong and Hyesung Lee, from the School of Pharmacy, Sungkyunkwan University, South Korea found that use of nonsteroidal anti-inflammatory drugs (NSAIDs) resulted in worsened clinical outcomes among adults hospitalized with coronavirus 2019 (COVID-19) by using South Korea’s nationwide healthcare data. These results were concluded by including 18 kinds of NSAIDs which is widely used in South Korea, for example ibuprofen. COVID-19, which was first identified in late 2019, is an ongoing pandemic and respiratory disease that is caused by the infection from the Severe Acute Respiratory Syndrome-Coronavirus 2 (SARS-CoV-2). As of August 25, 2020, there are a total of 214 countries affected worldwide, with more than 24 million confirmed cases and 82 thousand deaths. With the main symptoms of COVID-19 being high fever, cough, shortness of breath, NSAIDs are widely used to in these patients to manage their symptoms of fever and muscle pain. In March, 2020, the French Health Minister raised concerns regarding the potential harms NSAIDs may have when used in patients with COVID-19. This was based on case reports of four COVID-19 patients who developed worsened clinical outcomes following NSAIDs use. In addition, findings from previous studies reported lower incidence of adverse outcomes associated with acetaminophen than NSAIDs. Thus, the French Health Minister recommended acetaminophen be used as first-line agents to alleviate fever symptoms, which was also supported by the World Health Organization (WHO). These claims were based on one animal study, which increased angiotensin-converting enzyme 2 (ACE2) expressions with NSAIDs in various organs, where, ACE2 upregulation induced by NSAIDs could theoretically heighten the infectivity of SARS-CoV-2 to worsen clinical outcomes. Other mechanisms have also been suggested of which, NSAIDs could aggravate infections by upregulating COX-2 in activated B lymphocytes to interfere with antibody productions, or by selectively inhibiting interferon-γ productions that are vital for immunity against foreign pathogens. However, with no conclusive clinical evidence on this topic available, regulatory bodies such as the United States (US) Food and Drug Administration and the European Medicines Agency have released statements that there is insufficient evidence to draw conclusions regarding this safety concern and the WHO revised their initial statement accordingly. For such reasons, current clinical practice should not be changed until further evidence becomes available. Despite the widespread use of NSAIDs, to our knowledge, there is currently no published observational study that specifically assessed the association between NSAIDs use and clinical outcomes among COVID-19 patients. To investigate such concerns, professor Ju-Young Shin assembled an international collaborative research team comprised of a world renown clinical researcher from Harvard University, US, and an esteemed pharmacoepidemiologist from McGill University, Canada, and used the Health Insurance Review and Assessment Service (HIRA) database of South Korea, provided as part of the #OpenData4Covid19 project on March 27, 2020, by the Ministry of Health and Welfare and HIRA. Briefly, this data provided through this platform is real-world data (RWD) of all COVID19 patients in South Korea that contains healthcare utilization information based on a fee-for-service reimbursement system. Study participants were adults (aged ≥19 years) hospitalized with COVID-19 as of April 8, 2020. Based on the history of NSAIDs use in the 7 days before and including the date of hospitalization, patients were classified as either NSAIDs users or nonusers. Moreover, we balanced any differences in sociodemographic or clinical characteristics between NSAIDs users and nonusers by applying the propensity score as weights, which was estimated based on age, sex, health insurance type, history of comorbidities and use of co-medications, to evaluate the risk of adverse clinical outcomes. This study found that there were 1,824 adults hospitalized with COVID-19, of which, there were 354 NSAIDs users and 1,470 nonusers. NSAIDs users, as compared with nonusers, had a 54% increased risk of in-hospital death, intensive care unit admission, mechanical ventilation use, or sepsis. In addition, the study findings suggest the possibility of an elevated risk of cardiovascular complications, comprised of heart failure, myocardial infarction, and stroke, and acute renal failure associated with NSAIDs users. Professor Ju-Young Shin, corresponding author of the study, stated that, “I am excited that our study findings could serve as important scientific and real-world evidence to help clinicians in the decision to use NSAIDs for the treatment of fever or pain among patients with COVID-19 as the harms associated with their use may outweigh their benefits”. Moreover, researchers Han Eol Jeong and Hyesung Lee, joint co-authors of the study, noted that, “We are highly pleased by being able to provide meaningful real-world evidence to clinicians during such difficult times due to the COVID-19 pandemic, and further inform the world of the greatness of South Korea’s healthcare data”. This research was published in Clinical Infectious Diseases (IF=8.313, JCR Ranking 3.2%), a leading journal in the field of infectious disease with a broad international readership, on Monday, July 27, 2020. ※ Research Title: Association Between Nonsteroidal Anti-inflammatory Drug Use and Adverse Clinical Outcomes Among Adults Hospitalized With Coronavirus 2019 in South Korea: A Nationwide Study ※ Research Web Site: https://academic.oup.com/cid/article/doi/10.1093/cid/ciaa1056/5876905?searchresult=1 ※ Relevant News Articles: Yonhapnews: https://www.yna.co.kr/view/AKR20200805147700017 ChosunMedia: https://biz.chosun.com/site/data/html_dir/2020/08/06/2020080601112.html Korea Economic Daily: https://www.hankyung.com/it/article/202008067897Y

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