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Γ-Aminobutyric acid promotes methionine-choline deficient diet-induced nonalcoholic steatohepatitis

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The Journal of Biomedical Research 2017年第1期31卷 65-73页

作者： Yoon Seok Roh Ara Cho Zixiong Zhou Hyuneui Jeong Jeong-Eun Park youn-soo cha Suk-Heung Oh chae-Woong Lim Bumseok Kim Biosafety Research Institute and Laboratory of Pathology College of Veterinary Medicine Chonbuk National University lksan-si Jeollabuk-do 54596 Republic of Korea Department of Food Science and Human Nutrition Fermented Food Research Center Chonbuk National University Jeonju-si Jeollabuk-do 54896 Republic of Korea Department of Food & Biotechnology Woosuk University Jeonju 565701 Republic of Kore Animal Disease & Biosecurity Team National Institute of Animal Science Rural Development Administration Wanjugun 55365 Republic of Korea

Nonalcoholic steatohepatitis（NASH） is one of the most common liver diseases and a major cause of liver fibrosis worldwide.r-Aminobutyric acid（GABA） is one of the most abundant inhibitory neurotransmitters in the central nervous ***,it has been reported that GABAergic signaling pathways are found in various non-neuronal tissues including the immune system and play a functional *** the present study,we investigated whether administration of GABA has effects on NASH through its immunomodulatory *** test this hypothesis,C57BL/6 mice were fed a methionine-choline-deficient（MCD） diet for 8 *** four weeks into MCD feeding,mice were provided with plain water（control） or water containing 2 mg/mL of GABA for the subsequent 4 *** this MCD diet-induced NASH model,we found that mice receiving GABA showed more severe steatohepatitis and liver fibrosis than control *** increased liver damage was confirmed by higher levels of serum alanine transaminase（ALT） and aspartate aminotransferase（AST） compared to the control *** accordance with increased liver steatohepatitis,NASH-related and inflammatory gene expression（collagen al,tissue inhibitor of metalloproteinase-1,TNF-α） in the liver was markedly increased in GABA-treated ***,GABA directly enhanced production of inflammatory cytokines including IL-6 and TNF-α in LPS activated RAW macrophage cells and increased TIB-73 hepatocyte *** effects were abolished when GABA was treated with bicuculline,a competitive antagonist of GABA *** results suggest that oral administration of GABA may be involved in changes of the liver immune milieu and conferred detrimental effects on NASH progression.

关键词： Γ-Aminobutyric acid nonalcoholic steatohepatitis methionine-choline-deficient diet mice GABA

Interfacial engineering through lead binding using crown ethers in perovskite solar cells

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Journal of Energy Chemistry 2024年第5期92卷 263-270页

作者： Sun-Ju Kim YeonJu Kim Ramesh Kumar Chitumalla Gayoung Ham Thanh-Danh Nguyen Joonkyung Jang Hyojung cha Jovana Milić Jun-Ho Yum Kevin Sivula Ji-youn Seo Department of Nano Fusion Technology Pusan National UniversityBusan 46241Republic of Korea Laboratory for Molecular Engineering of Optoelectronic Nanomaterials Institute of Chemical Sciences and EngineeringÉcole Polytechnique Fédérale de Lausanne(EPFL)1015 LausanneSwitzerland Department of Energy Convergence and Climate change Kyungpook National UniversityDaegu 41566Republic of Korea Department of Hydrogen and Renewable Energy Kyungpook National UniversityDaegu 41566Republic of Korea Adolphe Merkle Institute University of FribourgCH-1700 FribourgSwitzerland

In the domain of perovskite solar cells(PSCs),the imperative to reconcile impressive photovoltaic performance with lead-related issue and environmental stability has driven innovative *** study pioneers an approach that not only rectifies lead leakage but also places paramount importance on the attainment of rigorous interfacial *** ethers,notably benzo-18-crown-6-ether(B18C6),were strategically integrated at the perovskite-hole transport material *** ethers exhibit a dual role:efficiently sequestering and immobilizing Pb^(2+)ions through host-guest complexation and simultaneously establishing a robust interfacial passivation *** crown ether candidates,guided by density functional theory(DFT)calculations,demonstrated proficiency in binding Pb2+ions and optimizing interfacial *** devices incorporating these materials achieved exceptional power conversion efficiency(PCE),notably 21.7%for B18C6,underscoring their efficacy in lead binding and interfacial *** techniques,including time-of-flight secondary ion mass spectrometry(ToF-SIMS),ultraviolet photoelectron spectroscopy(UPS),time-resolved photoluminescence(TRPL),and transient absorption spectroscopy(TAS),unequivocally affirmed Pb^(2+)ion capture and suppression of non-radiative ***,these PSCs maintained efficiency even after enduring 300 h of exposure to 85%relative *** research underscores the transformative potential of crown ethers,simultaneously addressing lead binding and stringent interfacial passivation for sustainable PSCs poised to commercialize and advance renewable energy applications.

关键词： Perovskite solar cells Interfacial passivation Crown ether materials Stability

胶陀螺菌丝体液态发酵条件及体外抗氧化活性分析

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贵州农业科学 2019年第12期47卷 64-69页

作者：钟宝李应华李凤林刘超 youn-soo cha 吉林农业科技学院食品工程学院吉林吉林132101 漯河职业技术学院食品学院河南漯河462002 韩国全北国立大学食品科学与人类营养韩国全罗北道全州54896

为胶陀螺菌作为抗氧化剂的开发应用提供参考依据,采用单因素试验与响应面法相结合筛选胶陀螺菌丝体液态发酵最优条件,并在此基础上测定其抗氧化活性。结果表明:最优发酵条件为葡萄糖、酵母浸膏、KH2PO4和MgSO4·7H2O的添加量分别为4.6%... 详细信息

为胶陀螺菌作为抗氧化剂的开发应用提供参考依据,采用单因素试验与响应面法相结合筛选胶陀螺菌丝体液态发酵最优条件,并在此基础上测定其抗氧化活性。结果表明:最优发酵条件为葡萄糖、酵母浸膏、KH2PO4和MgSO4·7H2O的添加量分别为4.6%、0.3%、0.5%和1%,装液量为100 mL/250 mL,接种量为10%,发酵温度25℃,转速150 r/min摇床培养6 d可获得菌丝体生物量14.95 g/L;菌丝体浓度为1.3 mg/mL时,对DPPH和ABTS自由基的清除率分别达68.25%和78.38%。胶陀螺菌丝体具有较好的抗氧化能力,可作为抗氧化剂产品进行开发。

关键词：胶陀螺菌丝体液态发酵发酵条件抗氧化性

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胶陀螺多糖超高压辅助提取响应面工艺优化

吉林农业科技学院学报 2019年第3期28卷 1-4,11,115页

作者：钟宝李凤林王英臣刘静雪 youn-soo cha 吉林农业科技学院食品工程学院吉林132101 不详韩国全北国立大学

以胶陀螺为原料,运用超高压辅助萃取技术,提取胶陀螺多糖,通过单因素实验和响应面法对提取工艺进行优化,胶陀螺多糖得率作为优化的响应值,考察超高压压力、保压时间、料液比3个因素对提取得率的影响。研究结果表明:在保压时间5min、料液... 详细信息

以胶陀螺为原料,运用超高压辅助萃取技术,提取胶陀螺多糖,通过单因素实验和响应面法对提取工艺进行优化,胶陀螺多糖得率作为优化的响应值,考察超高压压力、保压时间、料液比3个因素对提取得率的影响。研究结果表明:在保压时间5min、料液比1∶20g/mL、超高压力300Mpa的条件下,胶陀螺多糖提取得率最高,得率为5.03%。

关键词：胶陀螺多糖超高压响应面法

The SARS-CoV-2 spike protein induces lung cancer migration and invasion in a TLR2-dependent manner

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Cancer Communications 2024年第2期44卷 273-277页

作者： Mi-Jeong Kim Ji young Kim Ji Hye Shin Juhee Son Yeeun Kang soo-Kyung Jeong Duk-Hwan Kim Kyun-Hwan Kim Eunyoung Chun Ki-young Lee Department of Immunology Samsung Biomedical Research InstituteSungkyunkwan University School of MedicineSuwonRepublic of Korea Research and Development Center CHA Vaccine InstituteSeongnam-siRepublic of Korea Department of Molecular Cell Biology Sungkyunkwan University School of MedicineSuwonRepublic of Korea Department of Precision Medicine Sungkyunkwan University School of MedicineSuwonRepublic of Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences&TechnologySamsung Medical CenterSungkyunkwan UniversitySeoulRepublic of Korea

Dear editor,Severe acute respiratory syndrome coronavirus2(SARS-CoV-2)infection can lead to severe outcomes in patients with cancer[1].It has been reported that patients with lung cancers disproportionately manifest severe COVID-19 with a high rate of hospitalization and death[2].Notably,the SARS-CoV-2 Spike(S)protein can induce hyper-inflammation in both epithelial cells and macrophages through toll-like receptor(TLR)1/TLR2 or TLR2/6-dependent nuclear factor-kappaB(NF-κB)path-way[3].However,molecular and cellular evidence on whether the SARS-CoV-2 virus affects the severity of lung cancer patients through TLR1/2 or TLR2/6 signaling remains unclear.

关键词： lung TLR2 invasion

Obesity is an important determinant of severity in newly defined metabolic dysfunction-associated fatty liver disease

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Hepatobiliary & Pancreatic Diseases International 2022年第3期21卷 241-247页

作者： Ji Hye Huh Kwang Joon Kim Seung Up Kim Bong-soo cha Byung-Wan Lee Division of Endocrinology and Metabolism Department of Internal MedicineHallym University Sacred Heart HospitalAnyang 14068Korea Division of Geriatrics Department of Internal MedicineYonsei University College of MedicineSeoul 03722Korea Division of Endocrinology and Metabolism Department of Internal MedicineYonsei University College of MedicineSeoul 03722Korea Institute of Gastroenterology Department of Internal MedicineYonsei University College of MedicineSeoul 03722Korea

Background: The recently proposed definition of metabolic dysfunction-associated fatty liver disease(MAFLD) is based on the co-existence of hepatic steatosis with other metabolic disorders, including obesity and metabolic risk abnormalities such as hyperglycemia, high blood pressure and dyslipidemia. This study aimed to assess MAFLD severity according to the presence of metabolic abnormalities and obesity. Methods: Using transient elastography, hepatic steatosis and fibrosis severity were assessed by measuring the controlled attenuation parameter and liver stiffness measurement. A total of 1163 patients with MAFLD were categorized into the following four groups according to metabolic risk abnormalities and obesity presence: non-obese without metabolic risk abnormality group(Group 1;reference group);nonobese with metabolic risk abnormality group(Group 2);obese without metabolic risk abnormality group(Group 3);and obese with metabolic risk abnormality group(Group 4). A multiple logistic regression analysis was performed to determine severe hepatic steatosis and fibrosis risk in each group in both unadjusted and adjusted models. Results: In the adjusted model, the odds ratios(ORs) [95% confidence interval(CI)] for severe hepatic steatosis in Groups 2, 3, and 4 were 1.07(0.61-1.88), 2.43(1.44-4.08), and 4.07(2.56-6.48), respectively( P trend < 0.001). For liver fibrosis, compared with Group 1, Group 2 showed no significant increases in OR, whereas Groups 3 and 4(obese groups) showed significant increases(OR = 4.70, 95% CI: 1.24-17.82 and OR = 6.43, 95% CI: 1.88-22.02, respectively). Conclusions: Obesity, rather than metabolic abnormality, is the principal determinant of severe hepatic steatosis and fibrosis in patients with MAFLD.

关键词： Metabolic dysfunction-associated fatty liver disease Metabolically-healthy obesity Liver fibrosis

High-performance solid-solution potassium-ion intercalation mechanism of multilayered turbostratic graphene nanosheets

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Journal of Energy Chemistry 2022年第4期31卷 814-823页

作者： Jiae Um Seung Uk Yoon Hoseong Kim Beom Sik youn Hyoung-Joon Jin Hyung-Kyu Lim young soo Yun Program in Environmental and Polymer Engineering Inha Universityncheon 22212 South Korea Department of Polymer Science and Engineering Inha UniversityIncheon 22212South Korea Division of Chemical Engineering and Bioengineering Kangwon National University Chuncheon Gangwon-do 24341 South Korea KU-KIST Graduate School of Converging Science and Technologyea University 145 Anam-roSeongbuk-guSoul02841 South Korea Department of Integrative Energy Engineering 145 Anam-roSongbuk-guKorea UniversitySeoul 02841 South Korea

The solid-solution reaction between an alkali cation and an active host material is known as a singlephase redox mechanism,and it is typically accompanied by a continuous voltage *** is distinct from the typical alkali cation intercalation reaction at an equivalent site of the active host material,which exhibits a voltage ***,we report an unusual solid-solution potassium-ion intercalation mechanism with a low-voltage plateau capacity on multilayered turbostratic graphene nanosheets(T-GNSs).Despite the disordered graphitic structure with a broad range of d-spacings(3.65–4.18À),the T-GNSs showed a reversible plateau capacity of~200 m A h g^(-1),which is higher than that of a well-ordered graphite nanoplate(~120 m A h g^(-1)).In addition,a sloping capacity of~220 m A h g^(-1)was delivered with the plateau capacity,and higher rate capabilities,better reversibility,and a more stable cycling performance were confirmed on the turbostratic ***-principles calculations suggest that the multitudinous lattice domains of the T-GNSs contain diverse intercalation sites with strong binding energies,which could be the origin of the high-performance solid-solution potassium-ion intercalation behavior when the turbostratic graphene stacks have a d-spacing smaller than that of equilibrium potassium–graphite intercalation compounds(5.35À).

关键词： Turbostratic graphite Graphene nanosheet Defective carbon Anode Potassium-ion batteries

Effect of lifestyle modification on hepatocellular carcinoma incidence and mortality among patients with chronic hepatitis B

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World Journal of Gastroenterology 2023年第24期29卷 3843-3854页

作者： Yewan Park Danbee Kang Dong Hyun Sinn Hyunsoo Kim Yun soo Hong Juhee Cho Geum-youn Gwak Department of Internal Medicine Kyung Hee University HospitalSeoul 02447South Korea Department of Digital Health SAIHSTSungkyunkwan UniversitySeoul 06355South Korea Department of Clinical Research Design and Evaluation SAIHSTSungkyunkwan UniversitySeoul 06355South Korea Center for Clinical Epidemiology Samsung Medical CenterSungkyunkwan UniversitySeoul 06351South Korea Department of Medicine Samsung Medical CenterSungkyunkwan University School of MedicineSeoul 06351South Korea Departments of Epidemiology and Medicine and Welch Center for PreventionEpidemiology and Clinical ResearchJohns Hopkins Medical InstitutionsBaltimoreMD 21287United States

BACKGROUND Research exploring the influence of healthier lifestyle modification(LSM)on the risk of hepatocellular carcinoma(HCC)in patients with chronic hepatitis B(CHB)is *** To emulate a target trial to determine the effect of LSM on HCC incidence and mortality among patients with CHB by large-scale population-based observational *** Among the patients with CHB enrolled in the Korean National Health Insurance Service between January 1,2009,and December 31,2017,those aged≥20 years who drank alcohol,smoked cigarettes,and were sedentary were *** included at least one LSM,including alcohol abstinence,smoking cessation,and regular *** primary outcome was HCC development,and the secondary outcome was liver-related *** used 2:1 propensity score matching to account for *** With 48766 patients in the LSM group and 103560 in the control group,the adjusted hazard ratio(HR)for incident HCC and liver-related mortality was 0.92[95%confidence interval(CI):0.87-0.96]and 0.92(95%CI:0.86-0.99)in the LSM group,respectively,compared with the control *** the LSM group,the adjusted HR(95%CI)for incident HCC was 0.84(0.76-0.94),0.87(0.81-0.94),and 1.08(1.00-1.16)for alcohol abstinence,smoking cessation,and regular exercise,*** adjusted HR(95%CI)for liver-related mortality was 0.92(0.80-1.06),0.81(0.72-0.91),and 1.15(1.04-1.27)for alcohol abstinence,smoking cessation,and regular exercise,*** LSM lowered the risk of HCC and mortality in patients with ***,active LSM,particularly alcohol abstinence and smoking cessation,should be encouraged in patients with CHB.

关键词： Lifestyle modification Chronic hepatitis B Hepatocellular carcinoma Cancer Mortality

Evaluation of the Validity of chaos Theory Based on Systems Thinking for Non-Physicists

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Open Journal of Applied Sciences 2022年第5期12卷 845-854页

作者： Deok-soo cha Kyoung-Il Kim Eho Technology Co. Seoul S. Korea Soong-Sil University Seoul Korea Electrical Power Division Seoul in S. Korea Chung-Ang University Seoul Korea

chaos theory was born in the 18th century, physicists still solve the nonlinear dynamic systematic problems within closed-loop systems such as ecosystems, three-body problems involving complexity, and others. Moreover, it has been resolved these problems based on logical thinking using logical solutions with algebra and statistics such as chaos theory. The reason is determinism. Nevertheless, other scientists do not welcome the old chaos theory because the chaos theory is very imperfect and vague. Amazingly, in 2021, there is emerged, and an advanced and systematic solution based on system thinking;it was resolved by a non-physicist on behalf of physicists through interdisciplinary science and it is more perfect than the old chaos theory. Therefore, it is similar to the New World discovered by Columbus. This paper will prove that the existing chaos theory is invalid as a new solution emerges. Nevertheless, current physicists avoid approaching this study as much as possible. Therefore, other scientists have no reason to follow their invalid chaos theory unless physicists prove the validity of chaos theory.

关键词： Nonlinear Dynamics Control Theory MATLAB Systems Thinking