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Effect of extracts from Stachys sieboldii Miq. on cellular reactive oxygen species and glutathione production and genomic DNA oxidation

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Asian Pacific Journal of Tropical Biomedicine 2018年第10期8卷 485-489页

作者： JW lee W Wu SY lim Division of Marine Bioscience Korea Maritime and Ocean University Department of Marine Bio-Pharmacology Shanghai Ocean University

Objective: To evaluate the antioxidant activity of extracts and fractions from Stachys sieboldii Miq., and to examine its effect on the cellular reactive oxygen species(ROS) and glutathione(GSH) production and genomic DNA oxidation in HT-1080 cells. Methods: The ROS generation induced by H2 O2 was measured by the dichlorofluorescein-diacetate assay. GSH levels were measured using a fluorescent method with mBBr. Genomic DNA oxidative damage was measured with levels of oxidative DNA induced by the reaction of ferritin with H2 O2. Results: The n-hexane, 85% aqueous methanol and n-butanol fractions(0.05 mg/mL concentrations) inhibited H2 O2-induced ROS generation by 63%, 35% and 45%, respectively. GSH levels were significantly increased in both acetone+methylene chloride and methanol extracts(P<0.05). Supplementation of cells with n-hexane significantly increased GSH levels at concentrations of 0.05 mg/mL(P<0.05). Both the acetone+methylene chloride and methanol extracts, as well as all fractions significantly inhibited oxidative DNA damage(P<0.05). Conclusions: These results indicate that cellular oxidation was inhibited by the n-hexane fraction and this fraction may contain valuable active compounds.

关键词： Stachys sieboldii Miq. Reactive oxygen species Glutathione DNA oxidation Antioxidant

Novel Time-dependent Multi-omics Integration in Sepsis-associated Liver Dysfunction

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Genomics, Proteomics & Bioinformatics 2023年第6期21卷 1101-1116页

作者： Ann-yae Na Hyojin lee Eun Ki Min Sanjita Paudel So Young Choi HyunChae Sim Kwang-Hyeon Liu Ki-Tae Kim Jong-Sup Bae Sangkyu lee Research Institute of Pharmaceutical Sciences Kyungpook National UniversityDaegu 41566Republic of Korea Department of Environmental Engineering Seoul National University of Science and TechnologySeoul 01811Republic of Korea BK21 FOUR Community-Based Intelligent Novel Drug Discovery Education Unit College of PharmacyKyungpook National UniversityDaegu 41566Republic of Korea School of Pharmacy Sungkyunkwan UniversitySuwon 16419Republic of Korea

The recently developed technologies that allow the analysis of each single omics have provided an unbiased insight into ongoing disease ***,it remains challenging to specify the study design for the subsequent integration strategies that can associate sepsis pathophysiology and clinical ***,we conducted a time-dependent multi-omics integration(TDMI)in a sepsis-associated liver dysfunction(SALD)*** successfully deduced the relation of the Toll-like receptor 4(TLR4)pathway with *** TLR4 is a critical factor in sepsis progression,it is not specified in single-omics analyses but only in the TDMI *** finding indicates that the TDMI-based approach is more advantageous than single-omics analyses in terms of exploring the underlying pathophysiological mechanism of ***,TDMI-based approach can be an ideal paradigm for insightful biological interpretations of multi-omics datasets that will potentially reveal novel insights into basic biology,health,and diseases,thus allowing the identification of promising candidates for therapeutic strategies.

关键词： Multi-omics Omics technology Sepsis-associated liver dysfunction Single omics Time-dependent integration

Development of CAD/CAM system and profile measuring device for CNC grinding machine to obtain an optimal grinding speed

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Journal of Central South University 2011年第1期18卷 146-152页

作者： lim Sang-Heon KIM Jae-Hyun lee Choon-Man Agency of Promoting Technology Innovation Gyeongnam TechnoparkChangwon 641-465Korea School of Mechatronics Changwon National University

Cam mechanics is one of the most popular devices for generating irregular motions and is widely used in automatic equipment,such as textile machines,internal combustion engines,and other automatic *** order to obtain a positive motion from the follower using a rotating cam,its shape should be correctly designed and *** development of an adequate CAD/CAM system for a cam profile CNC grinding machine is necessary to manufacture high-precision *** purpose of this study is the development of a CAD/CAM system and profile measuring device for a CNC grinding machine to obtain an optimal grinding speed with a constant surface *** types of disk cams were manufactured using the proposed algorithm and procedures to verify effectiveness of the developed CAD/CAM system.

关键词： cam CAD/CAM system CNC grinding machine optimal grinding speed

Improvement of light uniformity by lighting arrangement for standardized crop production

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Journal of Central South University 2014年第11期21卷 4311-4319页

作者： lee Hwa-Soo Kwon Sook-Youn lim Jae-Hyun Department of Computer Science and Engineering Kongju National UniversityCheonan 331-717 Korea

In a commercialized, fully artificial plant factory, artificial luminaire is arranged in a unified way using a general illumination theory, an actual measurement, or an empirical methodology. However, with these methods, lightings are implemented without considering specific optical characteristics of lighting or material characteristics of each component that constructs a cultivation system, resulting in an amount of light that becomes irregular. The amount of lighting is closely related with the growth and quality of crops, and the deviation between points where cultivated crops are located causes quality difference in the produced crops, thus impairing the economic feasibility of a plant factory. In this regard, a simulation to figure out an optimum lighting layout was performed. Arrangements based on the spectrum distribution of light source and reflector materials were implemented to ascertain the distance between lighting and height of lighting and gather information in the pre-treatment process to improve the uniformity of light in the plant cultivation system. Improvement of around 15% in light uniformity is achieved compared with the existing system after the simulation is carried out. This result would reduce the deviation in crop growth to make uniform quality crop production possible.

关键词： high-quality crop light uniformity improvement optimal lighting layout fully artificial plant factory Relux simulation

Gene editing of authentic Brassica rapa flavonol synthase 1 generates dihydroflavonol-accumulating Chinese cabbage

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Horticulture Research 2023年第12期10卷 58-69页

作者： Sangkyu Park Hyo lee Jaeeun Song Chan Ju lim Jinpyo Oh Sang Hoon lee Saet Buyl lee Jong-Yeol lee Sunhyung lim Jin A.Kim Beom-Gi Kim Metabolic Engineering Division National Institute of Agricultural SciencesRural Development AdministrationJeonju54874South Korea Institute of Biotechnology and Breeding Asiaseed Inc.Icheon17414South Korea Food and Nutrition Division National Institute of Agricultural SciencesRural Development AdministrationWanju55365South Korea Department of Horticultural Biotechnology School of BiotechnologyHankyong National UniversityAnseong17579South Korea

Flavonols are the major class of flavonoids of green Chinese cabbage(Brassica rapa ***).The *** genome harbors seven flavonol synthase genes(BrFLSs),but they have not been functionally ***,transcriptome analysis showed four BrFLSs mainly expressed in Chinese *** them,only BrFLS1 showed major FLS activity and additional flavanone 3β-hydroxylase(F3H)activity,while BrFLS2 and BrFLS3.1 exhibited only marginal F3H *** generated BrFLS1-knockout(BrFLS1-KO)Chinese cabbages using CRISPR/Cas9-mediated genome editing and obtained transgene-free homozygous plants without off-target mutation in the T1 generation,which were further advanced to the T2 generation showing normal ***-ESI-QTOF-MS analysis revealed that flavonol glycosides were dramatically decreased in the T2 plants,while dihydroflavonol glycosides accumulated concomitantly to levels corresponding to the reduced levels of *** PCR analysis revealed that the early steps of phenylpropanoid and flavonoid biosynthetic pathway were upregulated in the BrFLS1-KO *** accordance,total phenolic contents were slightly enhanced in the BrFLS1-KO plants,which suggests a negative role of flavonols in phenylpropanoid and flavonoid biosynthesis in Chinese *** surveys revealed that the BrFLS1-KO Chinese cabbages showed normal head formation and reproductive phenotypes,but subtle morphological changes in their heads were *** addition,their seedlings were susceptible to osmotic stress compared to the controls,suggesting that flavonols play a positive role for osmotic stress tolerance in *** *** this study,we showed that CRISPR/Cas9-mediated BrFLS1-KO successfully generated a valuable breeding resource of Chinese cabbage with distinctive metabolic traits and that CRISPR/Cas9 can be efficiently applied in functional Chinese cabbage breeding.

关键词： steps slightly phenolic

Design and use of group-specific primers and probes for real-time quantitative PCR

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Frontiers of Environmental Science & Engineering 2011年第1期5卷 28-39页

作者： Juntaek lim Seung Gu SHIN Seungyong lee Seokhwan HWANG School of Environmental Science and Engineering Pohang University of Science and TechnologyPohangGyungbuk 790-784The Republic of Korea

Real-time quantitative polymerase chain reaction(qPCR)has gained popularity as a technique to detect and quantify a specific group of target microorganisms from various environmental samples including soil,water,sediments,and *** qPCR is a very useful technique for nucleic acid quantification,accurately quantifying the target microbial group strongly depends on the quality of the primer and probe *** aspects of conducting qPCR assays have become increasingly routine and automated;however,one of the most important aspects,designing and selecting primer and probe sets,is often a somewhat arcane *** many cases,failed or non-specific amplification can be attributed to improperly designed primer-probe *** paper is intended to provide guidelines and general principles for designing group-specific primers and probes for qPCR *** demonstrate the effectiveness of these guidelines by reviewing the use of qPCR to study anaerobic processes and biologic nutrient removal *** assays using group-specific primers and probes designed with this method,have been used to successfully quantify 16S ribosomal Ribonucleic Acid(16S rRNA)gene copy numbers from target methanogenic and ammoniaoxidizing bacteria in various laboratory-and full-scale biologic *** with a good command of primer and probe design can use qPCR as a valuable tool to study biodiversity and to develop more efficient control strategies for biologic processes.

关键词： absolute quantification design guideline primer probe real-time quantitative polymerase chain reaction(qPCR)

Extracellular vesicles for neural regeneration after spinal cord injury

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Neural Regeneration Research 2024年第3期19卷 491-492页

作者： Young-Ju lim Wook-Tae Park Gun Woo lee Department of Orthopedic Surgery Yeungnam University Medical CenterYeungnam University College of MedicineDaeguKorea

What is spinal cord injury:Spinal cord injury(SCI)is the damage to the structure of the bundles of cells and nerves that communicate signals from the brain to the body and *** pathology of SCI includes both primary and secondary injuries(Morales et al.,2016).Physical forces such as compression,shearing,contusion,and tearing are major causes of primary injury in *** are two main processes in primary injury:acute and *** acute phase includes traumatic disruption of axons and hemorrhage of the blood vessels around the spinal *** injury to the vessels can lead to increased edema within the neural and cord tissues,susceptibility to infiltration by microglia and astrocytes,excitotoxicity,and ***,disruption of the blood-spinal cord barrier results in the release of inflammatory cytokines from specific cells and vessels.

关键词： acute injuries nerves

Capacitive Control of Spontaneously Induced Electrical Charge of Droplet by Electric Field-Assisted Pipetting

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Nano-Micro Letters 2015年第4期7卷 341-346页

作者： Horim lee Dongwhi Choi Dong Sung Kim Geunbae lim Department of Mechanical Engineering Pohang University of Science and Technology (POSTECH) Analysis Science & Engineering Team Semiconductor R&D Center Samsung Electronics Co. Ltd.

The spontaneously generated electrical charge of a droplet dispensed from conventional pipetting is undesirable and unpredictable for most experiments that use ***,a method for controlling and removing the electrical charge needs to be *** this study,by using the electrode-deposited pipet tip(E-pipet tip),the charge-controlling system is newly developed and the electrical charge of a droplet is precisely *** effect of electrolyte concentration and volume of the transferred solution to the electrical charge of a dispensed droplet is theoretically and experimentally investigated by using the equivalent capacitor ***,a proof-of-concept example of the self-alignment and self-assembly of sequentially dispensed multiple droplets is demonstrated as one of the potential *** that the electrical charge of the various aqueous droplets can be precisely and simply controlled,the fabricated E-pipet tip can be broadly utilized not only as a general charge-controlling platform of aqueous droplets but also as a powerful tool to explore fundamental scientific research regarding electrical charge of a droplet,such as the surface oscillation and evaporation of charged droplets.

关键词： Pipet tip Capacitive control Electrical charge Self-assembly

Hepatic adenoma mimicking a metastatic lesion on computed tomography-positron emission tomography scan

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World Journal of Gastroenterology 2013年第27期19卷 4432-4436页

作者： Darryl lim Ser Yee lee Kiat Hon lim Chung Yip Chan Department of General Surgery Singapore General Hospital Department of Hepatopancreatobiliary and Transplant Surgery Singapore General Hospital Department of Surgical Oncology National Cancer Centre Duke-National University of Singapore (NUS) Graduate Medical School Department of Pathology Singapore General Hospital

Positron emission tomography (PET) using 18F-fluorodeoxyglucose ( 18F-FDG) is an imaging modality which reflects cellular glucose metabolism. Most malignant cells accumulate and trap 18F-FDG, allowing the visualisation of increased uptake. It is hence widely used to differentiate malignant from benign lesions. "False positive" findings of hepatic lesions have been described in certain instances such as hepatic abscesses, but are rare in cases involving hepatocellular adenomas. To our knowledge, there have been only 7 reports in the English literature documenting PET-avid hepatocellular adenomas; 6 of the 7 reports were published in the last 3 years with the first report by Patel et al. We report the case of a 44-year-old Chinese female patient with a history of cervical adenocarcinoma, referred for a hepatic lesion noted on a surveillance computed tomography (CT) scan. A subsequent CT-PET performed showed a hypermetabolic lesion (standardized uptake value 7.9) in segment Ⅳb of the liver. After discussion at a multidisciplinary hepato-pancreato-biliary conference, the consensus was that of a metastatic lesion from her previous cervical adenocarcinoma, and a resection of the hepatic lesion was performed. Histology revealed features consistent with a hepatocyte nuclear factor-1 α inactivated steatotic hepatocellular adenoma.

关键词： Hepatic adenoma Positron emission tomography 18F-fluorodeoxyglucose Hepatocellular adenoma Hepatocyte nuclear factor-1 α