Yun Hee Kim

Sungkyunkwan University, Sŏul, Seoul, South Korea

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Publications (74)185.46 Total impact

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    ABSTRACT: The purpose of this study was to analyze the status of inpatient care for acute first-ever stroke at three general hospitals in Korea to provide basic data and useful information on the development of comprehensive and systematic rehabilitation care for stroke patients. This study conducted a retrospective complete enumeration survey of all acute first-ever stroke patients admitted to three distinct general hospitals for 2 years by reviewing medical records. Both ischemic and hemorrhagic strokes were included. Survey items included demographic data, risk factors, stroke type, state of rehabilitation treatment, discharge destination, and functional status at discharge. A total of 2159 patients were reviewed. The mean age was 61.5±14.4 years and the ratio of males to females was 1.23:1. Proportion of ischemic stroke comprised 54.9% and hemorrhagic stroke 45.1%. Early hospital mortality rate was 8.1%. Among these patients, 27.9% received rehabilitation consultation and 22.9% underwent inpatient rehabilitation treatment. The mean period from admission to rehabilitation consultation was 14.5 days. Only 12.9% of patients were transferred to a rehabilitation department and the mean period from onset to transfer was 23.4 days. Improvements in functional status were observed in the patients who had received inpatient rehabilitation treatment after acute stroke management. Our analysis revealed that a relatively small portion of patients who suffered from an acute first-ever stroke received rehabilitation consultation and inpatient rehabilitation treatment. Thus, applying standardized clinical practice guidelines for post-acute rehabilitation care is needed to provide more effective and efficient rehabilitation services to patients with stroke.
    Yonsei Medical Journal 01/2015; 56(1):262-70. DOI:10.3349/ymj.2015.56.1.262 · 1.26 Impact Factor
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    ABSTRACT: The R2R3-type protein IbMYB1 is a key regulator of anthocyanin biosynthesis in the storage roots of sweetpotato [Ipomoea batatas (L.) Lam]. Previously, we demonstrated that IbMYB1 expression stimulated anthocyanin pigmentation in tobacco leaves and Arabidopsis. Here, we generated dual-pigmented transgenic sweetpotato plants that accumulated high levels of both anthocyanins and carotenoids in a single sweetpotato storage root. An orange-fleshed cultivar with high carotenoid levels was transformed with the IbMYB1 gene under the control of either the storage root-specific sporamin 1 (SPO1) promoter or the oxidative stress-inducible peroxidase anionic 2 (SWPA2) promoter. The SPO1-MYB transgenic lines exhibited higher anthocyanin levels in storage roots than empty vector control (EV) or SWPA2-MYB plants, but carotenoid content was unchanged. SWPA2-MYB transgenic lines exhibited higher levels of both anthocyanin and carotenoids than EV plants. Analysis of hydrolyzed anthocyanin extracts indicated that cyanidin and peonidin predominated in both overexpression lines. Quantitative RT-PCR analysis demonstrated that IbMYB1 expression in both IbMYB1 transgenic lines strongly induced the up-regulation of several genes in the anthocyanin biosynthetic pathway, whereas the expression of carotenoid biosynthetic pathway genes varied between transgenic lines. Increased anthocyanin levels in transgenic plants also promoted the elevation of proanthocyanidin and total phenolic levels in fresh storage roots. Consequently, all IbMYB1 transgenic plants displayed much higher antioxidant activities than EV plants. In field cultivations, storage root yields varied between the transgenic lines. Taken together, our results indicate that overexpression of IbMYB1 is a highly promising strategy for the generation of transgenic plants with enhanced antioxidant capacity.
    Physiologia Plantarum 09/2014; 153(4). DOI:10.1111/ppl.12281 · 3.26 Impact Factor
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    ABSTRACT: Background The purpose of present study was to examine biological and psychological characteristics of people according to the Sasang typology, which is popular in Korea. We evaluated the Sasang Personality Questionnaire (SPQ) as a measure of temperament, and Body Mass Index (BMI) as a measure of the somatic properties of each Sasang type. Methods Subjects were 2506 (877 males, 1629 females) outpatients between the ages of 20 through 70 who requested traditional medical assessment and treatment in Korea. The structural validity of the SPQ was examined and its correlation with BMI was analyzed. The SPQ and BMI measures of each Sasang type across age and gender were presented and their differences were analyzed with Analysis of Variance. Results Confirmatory factor analysis and path analysis identified an acceptable three-factor structure of the SPQ measuring differences in individual’s behavior, emotion, and cognition. SPQ scores (29.71 ± 1.00, 28.29 ± 0.19 and 26.14 ± 0.22) and BMI scores (22.92 ± 0.09, 25.56 ± 0.10 and 21.44 ± 0.10) were significantly (p < 0.001) different among So-Yang, Tae-Eum and So-Eum Sasang types, respectively. Conclusions The results showed that the SPQ and BMI is a reliable measure for quantifying the biopsychological characteristics of each types, and useful for guiding personalized and type-specific treatment with medical herbs and acupuncture.
    BMC Complementary and Alternative Medicine 08/2014; 14(1):315. DOI:10.1186/1472-6882-14-315 · 1.88 Impact Factor
  • Journal of Anesthesia 07/2014; 29(1). DOI:10.1007/s00540-014-1880-0 · 1.12 Impact Factor
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    ABSTRACT: Bone marrow-derived mesenchymal stem cells (BMSCs) are a good cell source for regeneration of cartilage as they can migrate directly to the site of cartilage injury and differentiate into articular chondrocytes. Articular cartilage defects do not heal completely due to the lack of chondrocytes or BMSCs at the site of injury. In this study, the chemotaxis of BMSCs toward chemokines, which may give rise to a complete regeneration of the articular cartilage, was investigated. CCR2, CCR4, CCR6, CXCR1, and CXCR2 were expressed in normal BMSCs and were increased significantly upon treatment with pro-inflammatory cytokines. BMSC migration was increased by MIP-3a and IL-8 more than by MCP-1 or SDF-1?. IL-8 and MIP-3? significantly enhanced the chemotaxis of BMSCs compared with MCP-1, SDF-1?, or the PBS. Human BMSC recruitment to transplanted scaffolds containing either IL-8 or MIP-3? significantly increased in vivo compared with that to scaffolds containing the PBS. Furthermore, IL-8- and MIP-3?-containing scaffolds enhanced tissue regeneration of ostechondral defect site formed in beagle knee articular cartilage. Therefore, this study suggests that IL-8 and MIP-3? are the candidates that induce the regeneration of damaged articular cartilage.
    Cell Transplantation 04/2014; 24(6). DOI:10.3727/096368914X681018 · 3.57 Impact Factor
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    ABSTRACT: Bone marrow-derived mesenchymal stromal cells (BM-MSCs) are a heterogeneous population of cells that differ in size and morphology. BM-MSCs become committed to the osteogenic lineage as senescence approaches and lose multipotency. Nevertheless, little is known about the effects of cell-cell interaction between different populations on stemness loss and lineage commitment. The current study aimed to identify mechanisms by which cell-cell interactions between heterogeneous BM-MSCs affect stemness and lineage commitment of multipotent subpopulation. The lineage commitment of primitive multipotent cells was strongly induced in the presence of cytokines secreted by senescent-like cells in a cell culture insert system. Senescent-like cells secreted higher levels of interleukin-6 (IL-6) than primitive multipotent cells in a human cytokine array. IL-6 induced the lineage commitment and stemness loss in multipotent cells by decreasing Sox2 expression. Furthermore, we confirmed that IL-6 decreased the transcriptional activity of Sox2 through up-regulation of Runx2 and Dlx5. We suggest a mechanism by which IL-6 modulates the expression of Sox2, resulting in decreased multipotency and causing primitive multipotent cells to undergo osteogenic lineage commitment. This is the first study to identify mechanisms in which the cell-cell interactions between the different populations play important roles in the stemness loss and lineage commitment of multipotent populations.-Yoon, D. S., Kim, Y. H., Lee, S., Lee, K.-M., Park, K. H., Jang, Y., Lee, J. W. Interleukin-6 induces the lineage commitment of bone marrow-derived mesenchymal multipotent cells through down-regulation of Sox2 by osteogenic transcription factors.
    The FASEB Journal 04/2014; 28(7). DOI:10.1096/fj.13-248567 · 5.48 Impact Factor
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    ABSTRACT: It was reported that 64% of tic disorder patients used complementary and alternative medicine. This review aims to evaluate the efficacy of herbal medicines in treating tic disorders. We searched eight databases including MEDLINE and CINAHL from their respective inceptions up to September 2013. The search terms were related to the concept of "herbal medicine" AND "tic disorder OR Tourette's syndrome". We included randomised controlled trials (RCTs) of any type of herbal medicines. We assessed the methodological quality of the trials according to the Cochrane risk of bias criteria. Sixty one studies were identified, and four RCTs met the inclusion criteria. Two types of herbal medicines, Qufeng Zhidong Recipe (QZR) decoction and Ningdong (ND) granules, were used in the included RCTs. All four RCTs had a high risk of bias. Two RCTs tested the effects of QZR on the Yale Global Tic Severity Scale (YGTSS) score and response rate compared with conventional medicine. The meta-analysis showed significant effects of QZR on the YGTSS score with high statistical heterogeneity (n = 142; weighted mean difference: -18.34; 95% confidence interval (CI): -23.07 to -13.60; I2 = 97%) and the response rate (n = 142; risk ratio: 1.69; 95% CI: 1.39 to 2.06; I2 = 0%). One RCT compared ND granules with placebo and showed significant effects on the YGTSS score and response rate. The other RCT show significant effects of ND granules plus conventional medicine on the response rate compared with conventional medicine only. This systematic review provided first piece of limited meta-analytic evidence for the effectiveness of herbal medicines in improving the symptoms of tic disorders.
    Chinese Medicine 02/2014; 9(1):6. DOI:10.1186/1749-8546-9-6 · 2.34 Impact Factor
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    ABSTRACT: The purpose of this systematic review is to investigate the efficacy of the oral administration of herbal medicines for otitis media with effusion through analysing trial data. Electronic searches of the following 11 databases will be performed: MEDLINE, CINAHL, EMBASE, AMED, the Cochrane CENTRAL, 3 Chinese databases (CNKI, Wangfang Data and VIP Information) and 5 Korean databases (KoreaMed, Research Information Service System, Korea Studies Information System, Oriental Medicine Advanced Searching Integrated System (OASIS) and DBpia). The selection of the studies, data abstraction and validations will be performed independently by two researchers. The systematic review will be published in a peer-reviewed journal. The review will also be disseminated electronically and in print. The review will be updated to inform and guide healthcare practice and policy. PROSPERO 2013: CRD42013005430.
    BMJ Open 01/2014; 4(2):e004095. DOI:10.1136/bmjopen-2013-004095 · 2.06 Impact Factor
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    ABSTRACT: In children with cerebral palsy (CP), the never-learned-to-use (NLTU) effect and underutilization suppress the normal development of cortical plasticity in the paretic limb, which further inhibits its functional use and increases associated muscle weakness. To highlight the effects of a novel comprehensive hand repetitive intensive strengthening training system on neuroplastic changes associated with upper extremity (UE) muscle strength and motor performance in children with spastic hemiplegic CP. Two children with spastic hemiplegic CP were recruited. Intervention with the comprehensive hand repetitive intensive strengthening training system was provided for 60 min a day, three times a week, for 10 weeks. Neuroplastic changes, muscle size, strength, and associated motor function were measured using functional magnetic resonance imaging (MRI), ultrasound imaging, and standardized motor tests, respectively. The functional MRI data showed that the comprehensive hand repetitive intensive strengthening training intervention produced measurable neuroplastic changes in the neural substrates associated with motor control and learning. These neuroplastic changes were associated with increased muscle size, strength and motor function. These results provide compelling evidence of neuroplastic changes and associated improvements in muscle size and motor function following innovative upper extremity strengthening exercise.
    Neurorehabilitation 01/2014; 35(1). DOI:10.3233/NRE-131036 · 1.74 Impact Factor
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    Kwang Hoon Song, Yun Hee Kim, Bu-Yeo Kim
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    ABSTRACT: Sho-saiko-to (SST) (also known as so-shi-ho-tang or xiao-chai-hu-tang) has been widely prescribed for chronic liver diseases in traditional Oriental medicine. Despite the substantial amount of clinical evidence for SST, its molecular mechanism has not been clearly identified at a genome-wide level. By using a microarray, we analyzed the temporal changes of messenger RNA (mRNA) and microRNA expression in primary mouse hepatocytes after SST treatment. The pattern of genes regulated by SST was identified by using time-series microarray analysis. The biological function of genes was measured by pathway analysis. For the identification of the exact targets of the microRNAs, a permutation-based correlation method was implemented in which the temporal expression of mRNAs and microRNAs were integrated. The similarity of the promoter structure between temporally regulated genes was measured by analyzing the transcription factor binding sites in the promoter region. The SST-regulated gene expression had two major patterns: (1) a temporally up-regulated pattern (463 genes) and (2) a temporally down-regulated pattern (177 genes). The integration of the genes and microRNA demonstrated that 155 genes could be the targets of microRNAs from the temporally up-regulated pattern and 19 genes could be the targets of microRNAs from the temporally down-regulated pattern. The temporally up-regulated pattern by SST was associated with signaling pathways such as the cell cycle pathway, whereas the temporally down-regulated pattern included drug metabolism-related pathways and immune-related pathways. All these pathways could be possibly associated with liver regenerative activity of SST. Genes targeted by microRNA were moreover associated with different biological pathways from the genes not targeted by microRNA. An analysis of promoter similarity indicated that co-expressed genes after SST treatment were clustered into subgroups, depending on the temporal expression patterns. We are the first to identify that SST regulates temporal gene expression by way of microRNA. MicroRNA targets and non-microRNA targets moreover have different biological roles. This functional segregation by microRNA would be critical for the elucidation of the molecular activities of SST.
    BMC Complementary and Alternative Medicine 01/2014; 14(1):14. DOI:10.1186/1472-6882-14-14 · 1.88 Impact Factor
  • European Journal of Anaesthesiology 01/2014; 31:206. DOI:10.1097/00003643-201406001-00590 · 3.01 Impact Factor
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    ABSTRACT: Lycii Fructus was used as natural products with therapeutic properties for a long time. Betaine is a natural amino acid and one of the major constituents of Lycii Fructus. It is reported that this fruit plays a role in reducing blood levels of homocysteine, a toxic byproduct of the amino acid metabolism. This study was used to establish infra based on oriental medicine through the analysis of correlation of taste, contents of betaine, %Brix and physico-chemical properties of Lycii Fructus. To investigate betaine, quantitative analysis was performed using HPLC separation system. In addition, %Brix and saccharide were estimated. Taste pattern analysis was measured using the taste sensing system, SA402B equipped with six taste sensors including newly developed sweetness sensor. Betaine quantitative analysis showed that L. barbarum 0.64 ± 0.15% (n = 6) was significantly higher than L. chinense 0.55 ± 0.1% (n = 12). And %Brix and saccharide composition of Lycii Fructus analysis showed that L. barbarum was significantly higher than L. chinense. The results of taste pattern analysis between L. barbarum and L. chinense showed a significant difference in almost every taste. In contrast, sweetness of L. barbarum was higher than L. chinense. When clustering with sweetness and bitterness, the two species are distinctly separated. In conclusion, these taste patterns, %Brix, betaine, and saccharide composition analysis could be applied to the establishment of herbal medicine marker for identification of different species in various regions.
    International Journal of Clinical and Experimental Medicine 01/2014; 7(8):2053-9. · 1.42 Impact Factor
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    Korean journal of anesthesiology 12/2013; 65(6 Suppl):S28-9. DOI:10.4097/kjae.2013.65.6S.S28
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    ABSTRACT: The aim of this systematic review is to analyse the trial data on the efficacy of herbal medicines for acute otitis media. The following 11 databases will be searched from their inception: MEDLINE, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), EMBASE, Allied and Complementary Medicine Database (AMED), the Cochrane Central Register of Controlled Trials (CENTRAL), China Network Knowledge Infrastructure (CNKI) and five Korean databases (Oriental Medicine Advanced Searching Integrated System (OASIS), DBPIA, KoreaMed, Research Information Service System (RISS) and the Korean Studies Information Service System (KISS)). The selection of the studies, the data abstraction and the validations will be performed independently by two researchers. The systematic review will be published in a peer-reviewed journal. The review will also be disseminated electronically and in print. Updates of the review will be conducted to inform and guide the healthcare practice and policy. PROSPERO 2013:CRD42013005100.
    BMJ Open 11/2013; 3(11):e003728. DOI:10.1136/bmjopen-2013-003728 · 2.06 Impact Factor
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    ABSTRACT: The purpose of this study was to review clinical studies on digestive system-related pathophysiological symptoms of each Sasang type to obtain the generalizable typespecific clinical features, which are important for the diagnosis of the Sasang type and subsequent disease treatment. Sasang typology and digestive system symptom-related keywords were used to search through eight domestic and foreign databases up to March 2012. The results were organized and analyzed based on four categories [digestive function, appetite, eating pattern, and body mass index (BMI)] to elucidate type-specific symptoms. Sasang type-specific digestive system-related symptoms were identified by reviewing 30 related articles that were gathered by searching through the databases. The Tae-Eum (TE) type had the highest digestive functions and the So-Eum (SE) type had the lowest. The TE type appeared to have larger volume with fast eating speed compared with the SE type and individuals in the TE category preferred fatty or salty food, which is responsible for the high occurrence rates of organic digestive diseases such as gastritis. Moreover, BMI was higher in the TE type and lower in the SE type. We systematically reviewed previously published clinical reports on digestive functions, which can be used to meet the objective of Sasang-type differentiation and pathophysiological pattern identification.
    06/2013; 2(2):39–48. DOI:10.1016/j.imr.2013.04.001
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    ABSTRACT: Rotenone is an inhibitor of mitochondrial complex I-induced neurotoxicity in PC12 cells and has been widely studied to elucidate the pathogenesis of Parkinson's disease. We investigated the neuroprotective effects of betaine on rotenone-induced neurotoxicity in PC12 cells. Betaine inhibited rotenone-induced apoptosis in a dose-dependent manner, with cell viability increasing from 50 % with rotenone treatment alone to 71 % with rotenone plus 100-μM betaine treatment. Flow cytometric analysis demonstrated cell death in the rotenone-treated cells to be over 50 %; the number of live cells increased with betaine pretreatment. Betaine pretreatment of PC12 cells attenuated rotenone-mediated mitochondrial dysfunction, including nuclear fragmentation, ATP depletion, mitochondrial membrane depolarization, caspase-3/7 activation, and reactive oxygen species production. Western blots demonstrated activation of caspase-3 and caspase-9, and their increased expression levels in rotenone-treated cells; betaine decreased caspase-3 and caspase-9 expression levels and suppressed their activation. Together, these results suggest that betaine may serve as a neuroprotective agent in the treatment of neurodegenerative diseases.
    Cellular and Molecular Neurobiology 04/2013; DOI:10.1007/s10571-013-9921-z · 2.20 Impact Factor
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    ABSTRACT: PurposeInterest in the association of epilepsy and pseudobulbar palsy was rekindled since the identification through magnetic resonance imaging (MRI) of bilateral perisylvian polymicrogyria (PMG). Seizures are often intractable, but resective epilepsy surgery has not been recommended. However, a similar clinical picture can be encountered in patients with bilateral perisylvian destructive lesions, which fit the description of ulegyria (ULG). We report a series of patients with epilepsy and pseudobulbar palsy due to bilateral perisylvian ULG (BP-ULG), show that hippocampal sclerosis (HS) is often associated and highlight the fact that in this entity, unlike in malformative bilateral perisylvian PMG, seizures may be surgically treated.Methods The motor, cognitive, epileptologic, and imaging features of 12 patients with perisylvian ULG followed at three institutions are described. For patients with refractory seizures, we detail extracranial and intracranial electrographic recordings, surgical strategies, histopathologic analyses of the resected tissue, and outcome of surgical treatment. Descriptive statistics were used for quantitative and categorical variables. Student's t-test was used to compare means, and a p < 0.05 was considered significant.Key FindingsPseudobulbar palsy and mental retardation were present in all patients with symmetrical BP-ULG. Five had refractory seizures. There was no relationship between the severity of the pseudobulbar palsy or of the mental retardation and the degree of seizure control with medication. The five patients in whom seizures were refractory to medication had significantly earlier age of onset and longer duration of epilepsy (p < 0.05). Dual pathology with associated unilateral HS was present in four. One patient with dual pathology had a temporolimbic electroclinical picture and had an anterior temporal lobectomy (ATL) based upon noninvasive evaluation. The other four had ictal semiology suggesting involvement of both temporolimbic and perisylvian cortex. Intracranial electroencephalography (EEG) showed concomitant seizure onset in the anterior temporal region and in the ipsilateral ULG in three of the four with dual pathology and in the ulegyric cortex in the one without HS. Resection guided by a combination of semiology, MRI, and extra and intracranial EEG led to complete seizure control in two and almost complete seizure control (Engel class II) in two other patients. The only surgical failure was an isolated ATL in a patient with dual pathology, and concomitant seizure onset in both lesions according to semiology and intracranial EEG.SignificanceOur findings suggest that BP-ULG mimics the clinical features of bilateral perisylvian PMG. In patients with refractory seizures, recognition of this entity should lead to consideration of resective surgery despite the bilateral ULG.
    Epilepsia 04/2013; 54(8). DOI:10.1111/epi.12160 · 4.58 Impact Factor
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    ABSTRACT: Antimycin A (AMA) damages the mitochondria through inhibition of mitochondrial electron transport. In this study, exposure of L6 rat skeletal muscle cells to AMA induced a decrease in ATP content, followed by a decrease in mitochondrial membrane potential, leading to apoptosis. We evaluated the protective effects of water and ethanol extracts of Nelumbo nucifera seeds on L6 cells with AMA-induced oxidative stress. We found that the extracts reduced cellular apoptosis; preserved the mitochondrial membrane potential; protected mitochondrial ATP production; inhibited p53, Bax, and caspase 3 activities; and induced Bcl-2 production. Our results suggested that AMA induced apoptosis in L6 cells via impairment of mitochon- drial function. N. nucifera extracts protected the cells from this mitochondria-mediated cell death.
    Environmental Toxicology and Pharmacology 03/2013; 36(1):19-29. DOI:10.1016/j.etap.2013.02.015 · 2.08 Impact Factor
  • 11/2012; 27(6):37-42. DOI:10.6116/kjh.2012.27.6.37

Publication Stats

710 Citations
185.46 Total Impact Points

Institutions

  • 2005–2015
    • Sungkyunkwan University
      • • Samsung Medical Center
      • • Institute of Basic Science
      Sŏul, Seoul, South Korea
  • 2014
    • Yonsei University
      • Department of Orthopaedic Surgery
      Sŏul, Seoul, South Korea
    • Gyeongsang National University
      • Institute of Agriculture and Life Science
      Shinshū, Gyeongsangnam-do, South Korea
  • 2012–2014
    • Korea Institute of Oriental Medicine
      Bucheon, Gyeonggi Province, South Korea
    • National Cancer Center Korea
      Kōyō, Gyeonggi-do, South Korea
  • 2008–2014
    • Yonsei University Hospital
      • Department of Internal Medicine
      Sŏul, Seoul, South Korea
    • Kyung Hee University
      Sŏul, Seoul, South Korea
    • Gwangju Institute of Science and Technology
      • Department of Life Sciences
      Gwangju, Gwangju, South Korea
  • 2007–2014
    • Daejeon University
      • College of Oriental Medicine
      Daiden, Daejeon, South Korea
    • Ulsan University Hospital
      Urusan, Ulsan, South Korea
    • Seoul National University
      • Department of Biological Sciences
      Sŏul, Seoul, South Korea
  • 2013
    • Pusan National University
      • School of Korean Medicine
      Busan, Busan, South Korea
  • 2011–2012
    • Korea University
      • Department of Anesthesiology and Pain Medicine
      Seoul, Seoul, United States
    • Dong-A University
      • Department of Nursing
      Pusan, Busan, South Korea
  • 2010
    • Dong-Pusan College
      Tsau-liang-hai, Busan, South Korea
    • Catholic University of Korea
      • Department of Obstetrics and Gynecology
      Sŏul, Seoul, South Korea
    • Ajou University
      • Department of Physiology
      Seoul, Seoul, South Korea
  • 2006–2010
    • Chonnam National University
      • College of Veterinary Medicine
      Gwangju, Gwangju, South Korea
  • 2009
    • Kosin University
      Tsau-liang-hai, Busan, South Korea
  • 2003–2009
    • Chungnam National University
      • • College of Veterinary Medicine
      • • Department of Pharmacology
      Seongnam, Gyeonggi, South Korea
    • Pohang University of Science and Technology
      • Department of Life Sciences
      Antō, North Gyeongsang, South Korea