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( Ji Young Eum ),( Yeoung Kyun Kim ),( Eun Ji Park ),( Ju Hee Lee ),( Ji Eun Lee ),( Jin Ju Lim ),( Man Ho Choi ),( Hyun Hee Kim ) 물리치료재활과학회 2015 Physical therapy rehabilitation science Vol.4 No.1
Objective: Jump training helps increase the muscle power by improving the muscle strength and reaction time of the muscle in operation. The purpose of this study was to identify the effects of strengthening, stretching exercise and meditation on electromyographic (EMG) onset timing of rectus femoris and gastrocnemius muscle during vertical jump performance. Design: Cross-sectional study. Methods: Ten healthy adults (5 male and 5 female) who were familiar with the vertical jumping task and had no lower extremity injuries or any bone or joint disorders, were recruited for this study. Muscle onset timing was measured by surface EMG. After EMG onset timing were measured during performing three baseline vertical jump trials, strengthening and stretching exercises of the rectus femoris and gastrocnemius, and meditation were performed in random order. EMG onset timing was measured during vertical jump after intervention, respectively. EMG value was averaged for the three trials and analyzed using one-way repeated ANOVA. Results: During vertical jump, EMG onset timing of gastrocnemius was a significant difference after intervention (p<0.05), and then there was significantly faster in strengthening exercise than meditation (p<0.05). Conclusions: These results indicate the potential positive effect of performing strengthening exercise of the gastrocnemius before a jumping event. Future research is required to identify the effects of intervention over a long period.
Eum, Ji Young,Hwang, Sang Youn,Ju, Youngjun,Shim, Jong Min,Piao, Yunxian,Lee, Jinwoo,Kim, Hak-Sung,Kim, Jungbae The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.27
<P>A highly sensitive immunoassay was developed by using antibody-conjugated spherical mesoporous silica with immobilized enzymes. The higher ratio of enzyme/antibody than conventional ELISA improved both the sensitivity and dynamic range. Especially, the use of spherical mesoporous silica could achieve a limit of detection (LOD) with a sensitivity that is 20 times more than that of ELISA using amorphous silica.</P> <P>Graphic Abstract</P><P>A highly sensitive immunoassay was developed by using antibody-conjugated spherical mesoporous silica with immobilized enzymes. High ratio of enzyme to antibody improved both the sensitivity and dynamic range. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3cc48044e'> </P>
Eum, Ji Young,Kim, Yeoung Kyun,Park, Eun Ji,Lee, Ju Hee,Lee, Ji Eun,Lim, Jin Ju,Choi, Man Ho,Kim, Hyun Hee korean Academy of Physical Therapy Rehabilitation 2015 Physical therapy rehabilitation science Vol.4 No.1
Objective: Jump training helps increase the muscle power by improving the muscle strength and reaction time of the muscle in operation. The purpose of this study was to identify the effects of strengthening, stretching exercise and meditation on electromyographic (EMG) onset timing of rectus femoris and gastrocnemius muscle during vertical jump performance. Design: Cross-sectional study. Methods: Ten healthy adults (5 male and 5 female) who were familiar with the vertical jumping task and had no lower extremity injuries or any bone or joint disorders, were recruited for this study. Muscle onset timing was measured by surface EMG. After EMG onset timing were measured during performing three baseline vertical jump trials, strengthening and stretching exercises of the rectus femoris and gastrocnemius, and meditation were performed in random order. EMG onset timing was measured during vertical jump after intervention, respectively. EMG value was averaged for the three trials and analyzed using one-way repeated ANOVA. Results: During vertical jump, EMG onset timing of gastrocnemius was a significant difference after intervention (p<0.05), and then there was significantly faster in strengthening exercise than meditation (p<0.05). Conclusions: These results indicate the potential positive effect of performing strengthening exercise of the gastrocnemius before a jumping event. Future research is required to identify the effects of intervention over a long period.
Kim, So Mi,Hwang, In Koo,Yoo, Dae Young,Eum, Won Sik,Kim, Dae Won,Shin, Min Jea,Ahn, Eun Hee,Jo, Hyo Sang,Ryu, Eun Ji,Yong, Ji In,Cho, Sung-Woo,Kwon, Oh-Shin,Lee, Keun Wook,Cho, Yoon Shin,Han, Kyu Hyu BlackWell Publishing Ltd 2015 JOURNAL OF CELLULAR AND MOLECULAR MEDICINE Vol.19 No.6
<P>Oxidative stress-induced reactive oxygen species (ROS) are responsible for various neuronal diseases. Antioxidant 1 (Atox1) regulates copper homoeostasis and promotes cellular antioxidant defence against toxins generated by ROS. The roles of Atox1 protein in ischaemia, however, remain unclear. In this study, we generated a protein transduction domain fused Tat-Atox1 and examined the roles of Tat-Atox1 in oxidative stress-induced hippocampal HT-22 cell death and an ischaemic injury animal model. Tat-Atox1 effectively transduced into HT-22 cells and it protected cells against the effects of hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>)-induced toxicity including increasing of ROS levels and DNA fragmentation. At the same time, Tat-Atox1 regulated cellular survival signalling such as p53, Bad/Bcl-2, Akt and mitogen-activate protein kinases (MAPKs). In the animal ischaemia model, transduced Tat-Atox1 protected against neuronal cell death in the hippocampal CA1 region. In addition, Tat-Atox1 significantly decreased the activation of astrocytes and microglia as well as lipid peroxidation in the CA1 region after ischaemic insult. Taken together, these results indicate that transduced Tat-Atox1 protects against oxidative stress-induced HT-22 cell death and against neuronal damage in animal ischaemia model. Therefore, we suggest that Tat-Atox1 has potential as a therapeutic agent for the treatment of oxidative stress-induced ischaemic damage.</P>
Kim, Kyun Ha,Kim, Eun Jung,Kwun, Min Jung,Lee, Ji Yeon,Bach, Tran The,Eum, Sang Mi,Choi, Jun Yong,Cho, Sayeon,Kim, Sang-Jun,Jeong, Seung-Il,Joo, Myungsoo Elsevier 2018 Journal of Ethnopharmacology Vol.217 No.-
<P><B>Abstract</B></P> <P><B>Ethnopharmacological relevance</B></P> <P>Although <I>Spilanthes acmella</I> has been used to relieve inflammation, fever, pain, or infection in traditional Asian medicine, experimental evidence supporting these functions is scarce. Here, we examined an anti-inflammatory function and a possible underlying mechanism of <I>S. acmella</I> Murray (SAM).</P> <P><B>Materials and method</B></P> <P>The methanol extract of SAM was fingerprinted by HPLC. C57BL/6 mice were administered with a single intratracheal (i.t.) LPS and 2 h later with a single i.t. SAM. The effect of SAM on lung inflammation was assessed by histology, semi-quantitative RT-PCR, and MPO assay of lung tissue. The effects of SAM on a pro-inflammatory factor NF-κB and an anti-inflammatory factor Nrf2 were analyzed by immunoblotting of nuclear proteins and by semi-quantitative RT-PCR analysis of mRNA of the genes governed by these transcription factors. V5-Nrf2 was precipitated by an anti-V5 antibody and the ubiquitinated V5-Nrf2 was revealed by immunoblotting of HA-tagged ubiquitin.</P> <P><B>Results</B></P> <P>The i.t. SAM robustly diminished a neutrophilic lung inflammation induced by i.t. LPS treatment of mice. In RAW 264.7 cells, SAM suppressed the nuclear localization of NF-κB and the expression of NF-κB-dependent cytokine genes. SAM increased the level of Nrf2 in the nucleus and the expression of Nrf2-dependent genes while suppressing ubiquitination of Nrf2.</P> <P><B>Conclusion</B></P> <P>Our results suggest that SAM can suppress a neutrophilic inflammation in mouse lungs, which is associated with suppressed NF-κB and activated Nrf2. Our results provide experimental evidence supporting the anti-inflammatory function of <I>S. acmella</I>.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Eum, Won Sik,Shin, Min Jea,Lee, Chi Hern,Yeo, Hyeon Ji,Yeo, Eun Ji,Choi, Yeon Joo,Kwon, Hyun Jung,Kim, Duk-Soo,Kwon, Oh Shin,Lee, Keun Wook,Han, Kyu Hyung,Park, Jinseu,Kim, Dae Won,Choi, Soo Young Elsevier 2019 Biochimie Vol.156 No.-
<P><B>Abstract</B></P> <P>Parkinson's disease (PD), a neurodegenerative disorder, is characterized by a loss of dopaminergic neurons in the substantia nigra (SN) of the brain and it is well known that the pathogenesis of PD is related to a number of risk factors including oxidative stress. Antioxidant 1 (ATOX1) protein plays a crucial role in various diseases as an antioxidant and chaperone. In this study, we determined whether Tat-ATOX1 could protect against 1-methyl-4-phenylpyridinium ion (MPP<SUP>+</SUP>)-induced SH-SY5Y cell death and in a 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced animal model of PD. In the MPP<SUP>+</SUP> exposed SH-SY5Y cells, Tat-ATOX1 markedly inhibited cell death and toxicities. In addition, Tat-ATOX1 markedly suppressed the activation of Akt and mitogen activated protein kinases (MAPKs) as well as cleavage of caspase-3 and Bax expression levels. In a MPTP-induced animal model, Tat-ATOX1 transduced into brain and protected dopaminergic neuronal cell loss. Taken together, Tat-ATOX1 inhibits dopaminergic neuronal death through the suppression of MAPKs and apoptotic signal pathways. Thus, Tat-ATOX1 represents a potential therapeutic protein drug candidate for PD.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Tat-ATOX1 transduces into SH-SY5Y cells and inhibited MPP<SUP>+</SUP>-induced cell death. </LI> <LI> Tat-ATOX1 suppressed the activation of Akt and MAPKs in MPP<SUP>+</SUP> exposed SH-SY5Y cells. </LI> <LI> Tat-ATOX1 inhibited dopaminergic neuronal cell loss in MPTP-induced animal model. </LI> <LI> Tat-ATOX1 represent a potential therapeutic agent for PD. </LI> </UL> </P>
Kim, Hyun Jong,Choi, Ji Hyun,Hwang, Jung-Hwan,Kim, Kyong-Shim,Noh, Jung-Ran,Choi, Dong-Hee,Moon, Sung Je,Kim, Hyun-Yong,Kim, Sang-Woo,Choi, Sangho,Eum, Sang Mi,Bach, Tran The,Rho, Jaerang,Lee, Ju Yong UNKNOWN 2018 INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE Vol.42 No.5
<P><I>Melicope ptelefolia</I> has been traditionally used to treat rheumatism and fever. The present study aimed to investigate the therapeutic effect of 3,5-di-C-<I>β</I>-<SUB><SMALL>D</SMALL></SUB>-glucopyranosyl phloroacetophenone (βGP), a main component of <I>M. ptelefolia</I>, on rheumatoid arthritis (RA). A model of collagen-induced arthritis (CIA) was established in mice using the RAW 264.7 murine macrophage cell line and mouse embryonic fibroblasts (MEFs). The clinical scores of arthritis, swelling, histopathological findings, and micro-computed tomography in CIA mouse paws were assessed. The levels of anti-type II collagen antibody and cytokines were determined in the plasma and cell culture supernatant, respectively. Protein and gene expression levels were analyzed by western blot and reverse transcription-quantitative polymerase chain reaction analyses. βGP significantly decreased the gross arthritic scores of CIA mice and joint swelling, and decreased articular inflammation, cartilage degradation and bone erosion. However, βGP did not exert any effect on anti-type II collagen immunoglobulin G plasma levels or inflammatory cytokine expression in macrophages. βGP significantly suppressed the expression of interleukin-6 and leukemia inhibitory factor and decreased the phosphorylation of signal transducer and activator of transcription 3, and expression of receptor activator of nuclear factor-κB ligand in tumor necrosis factor-α-stimulated MEFs and in CIA mouse paws. Osteoclast-related gene expression was significantly reduced in CIA mouse paws. Taken together, βGP suppressed the development of RA by regulating the activation of synovial fibroblasts.</P>
Parts per trillion detection of Ni(II) ions by nanoparticle-enhanced surface plasmon resonance.
Kim, Eum Ji,Chung, Bong Hyun,Lee, Hye Jin American Chemical Society 2012 ANALYTICAL CHEMISTRY - Vol.84 No.22
<P>This paper demonstrates the development of a novel nanoparticle-enhanced surface plasmon resonance (SPR) sensing platform for the selective and sensitive in situ detection of nickel(II) ions at concentrations as low as 50 parts per trillion (211 pM). An enhancement in selectivity was achieved by designing a surface sandwich assay involving two different ligands each selective toward nickel(II) ions, namely, N-[5-(3'-maleimidopropylamido)-1-carboxypentyl]iminodiacetic acid (NTA) and polyhistidine. Maleimido-modified NTA was first immobilized on an alkanedithiol-modified gold thin film, followed by the sequential adsorption of Ni(II) ions. Next, polyhistidine-functionalized quasispherical gold nanoparticles, designed to enhance the SPR sensitivity, were specifically adsorbed onto surface Ni(II)-NTA complexes. This process was monitored by real-time SPR. The ability to detect Ni(II) ions as low as 50 parts per trillion (ppt) is a remarkable improvement compared to other optical and colorimetric techniques utilizing nanoparticles and is comparable to what can be achieved by state-of-the-art inductively coupled plasma mass spectrometry (ICP-MS). The improved selectivity for Ni(II) ions by the sandwich assay approach was confirmed by comparing measurements involving other divalent cations such as Zn(II), Pb(II), and Cu(II), some of which individually possess binding affinities toward either the NTA or histidine moieties.</P>
Neuraminidase Inhibitors from the Fruiting Body of Phellinus igniarius
( Ji-yul Kim ),( Dae-won Kim ),( Byung Soon Hwang ),( E-eum Woo ),( Yoon-ju Lee ),( Kyeong-woon Jeong ),( In-kyoung Lee ),( Bong-sik Yun ) 한국균학회 2016 Mycobiology Vol.44 No.2
During our ongoing investigation of neuraminidase inhibitors from medicinal fungi, we found that the fruiting bodies of Phellinus igniarius exhibited significant inhibitory activity against neuraminidase from recombinant H3N2 influenza viruses. Two active compounds were isolated from the methanolic extract of P. igniarius through solvent partitioning and Sephadex LH-20 column chromatography. The active compounds were identified as phelligridins E and G on proton nuclear magnetic resonance (1H NMR) and electrospray ionization mass measurements. These compounds inhibited neuraminidases from recombinant rvH1N1, H3N2, and H5N1 influenza viruses, with IC50 values in the range of 0.7~8.1 μM.