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Goyang, South Korea

Lee J.E.,Yonsei University | Lee Y.K.,Ilsan Hospital | Choi E.J.,Yonsei University | Nam J.S.,Yonsei University | And 2 more authors.
The Scientific World Journal | Year: 2013

Background. The prevalence of coronary artery stenosis (CAS) at the initiation of renal replacement therapy (RRT) in chronic kidney disease (CKD) patients has not been fully elucidated. Although coronary angiography is the gold standard in diagnosing CAS its invasiveness and economic burden lead to searching for a noninvasive alternative method. In this study, we evaluated the prevalence of CAS by multidetector row computed tomography (MDCT) and related risk factor to articulate the usefulness of MDCT. Method. Seventy-four asymptomatic CKD patients who began dialysis were evaluated with echocardiography and MDCT. The patients were stratified into two groups according to CAS and coronary artery calcification score (CACS) by MDCT to detect silent CAS and evaluate its predictability for cardiac events. Results. CAS was seen in 24 (32.4%) of 74 asymptomatic CKD patients on MDCT. Both groups showed increasing frequencies of CAS with age (P < 0.01), presence of diabetes (P < 0.05), uric acid level (P < 0.01), and calcium score (P < 0.01). Multiple regression analysis revealed that age and uric acid level were independent risk factors for CAS and high CACS in asymptomatic CKD patients at the initiation of dialysis. Patients with both CAS and high CACS were presented with higher cardiac events rates compared to those without any of them. In Cox regression model, age and the presence of CAS and high CACS on MDCT were an independent risk factor for cardiac events in these patients. Conclusion. We showed that CAS was highly seen in asymptomatic CKD patients starting dialysis. Moreover, both high CACS and CAS on MDCT might predict cardiac events in these patients and MDCT can be a useful screening tool for evaluating coronary artery disease and predicting cardiovascular mortality noninvasively. © 2013 Jung Eun Lee et al. Source


Lee Y.,University of Utah | Nam H.Y.,University of Utah | Kim J.,University of Utah | Lee M.,University of Utah | And 5 more authors.
Molecular Therapy | Year: 2012

Erythropoiesis-stimulating agents are widely used to treat anemia for chronic kidney disease (CKD) and cancer, however, several clinical limitations impede their effectiveness. Nonviral gene therapy systems are a novel solution to these problems as they provide stable and low immunogenic protein expression levels. Here, we show the application of an arginine-grafted bioreducible poly(disulfide amine) (ABP) polymer gene delivery system as a platform for in vivo transfer of human erythropoietin plasmid DNA (phEPO) to produce long-term, therapeutic erythropoiesis. A single systemic injection of phEPO/ABP polyplex led to higher hematocrit levels over a 60-day period accompanied with reticulocytosis and high hEPO protein expression. In addition, we found that the distinct temporal and spatial distribution of phEPO/ABP polyplexes contributed to increased erythropoietic effects compared to those of traditional EPO therapies. Overall, our study suggests that ABP polymer-based gene therapy provides a promising clinical strategy to reach effective therapeutic levels of hEPO gene. © The American Society of Gene & Cell Therapy. Source


Lee S.,Yonsei University | Kim D.-K.,Ilsan Hospital | Narm K.S.,Yonsei University | Cho S.-H.,Yonsei University
Korean Journal of Thoracic and Cardiovascular Surgery | Year: 2011

A 43-year-old woman was diagnosed with an intravenous leiomyomatosis at a previous hospital and transferred to our hospital to undergo surgical treatment. Emergency one-stage operation for coincidental removal of intra-abdominal, right atrial, and intravenous masses were planned. Upon arriving at the operating room, she suffered a sudden onset of severe dyspnea and showed hemodynamic instability. Intraoperative TEE showed pulmonary embolization of a right atrial mass. Removal of the pulmonary artery mass and the intra-abdominal mass, and the cardiopulmonary bypass were performed without any complications. © The Korean Society for Thoracic and Cardiovascular Surgery. 2011. Source


Park Y.S.,Korea University | Park Y.S.,Yonsei University | Min K.T.,CHA Medical University | Kim T.-G.,Korea University | And 6 more authors.
Child's Nervous System | Year: 2011

Objective: We conducted a case-control study to investigate whether polymorphisms in eNOS are related to the age-specific onset of moyamoya disease. Materials and methods: Ninety-three Korean patients [mean age, 23.0±16.1 years; 59 female (63.4%) and 34 male (36.6%)] with moyamoya disease were consecutively recruited for this study. Three hundred twenty-eight healthy subjects [mean age, 27.7±16.2 years; 217 female (66.2%), 111 male (33.8%)] were consecutively included in the control group. The subjects were divided into pediatric (<20 years) and adult (≥20 years) groups. We further divided the moyamoya group into ischemic and hemorrhagic groups based on clinical and MRI findings. The frequencies and distributions of four eNOS polymorphisms (eNOS -922A>G, -786T>C, 4a4b, and 894G>T) were assessed in pediatric and adult patients with moyamoya disease and compared to the frequencies and distribution in the control group. Results: No differences in eNOS polymorphisms were observed between control and moyamoya disease group. However, we found that the 4a4b sequences was less frequent in the adult group (p=0.029). Compared to the control group, there were differences in the haplotype distribution of the study group, specifically the A-4b-G haplotype, which was seen more frequently in the adult patient group. Conclusion: Our results suggest that pediatric and adult-onset moyamoya disease have different genetic backgrounds. These genetic differences can affect age-specific clinical characteristics, such as cerebral ischemia and hemorrhage. © 2011 Springer-Verlag. Source


Choi Y.S.,Korea University | Hwang S.W.,Catholic University of Korea | Hwang I.C.,Gachon University | Lee Y.J.,University of Seoul | And 5 more authors.
Psycho-Oncology | Year: 2016

Objective Limited research has examined the quality of life (QOL) and its correlates among family caregivers (FCs) during the final stage of terminal cancer. The purpose of this study was to investigate the determinants of overall QOL and its subdomains among Korean FCs at the very end of life. Methods For this cross-sectional study, we enrolled 299 FCs of terminal cancer patients from seven palliative care units. To assess FCs' QOL and its predictors, we used the Caregiver Quality Of Life Index-Cancer, which contains four domains. Possible determinants of caregiver QOL were categorized into patient, caregiver, and environmental factors. A multiple regression model was used to identify factors associated with FCs' QOL. Results Variance in each Caregiver Quality Of Life Index-Cancer domain was explained by different factors. FCs of younger patient felt more burden but were more likely to adapt positively. Emotional distress of FCs was strongly associated with total QOL, burdensomeness, and disruptiveness. Positive adaptation was related to more visits for care, FCs' religiousness, more social support, and satisfactory perceived quality of care. Financial concerns were more likely in married FCs, FCs with less social support, or low incomes. Conclusion Emotional distress of FCs was the most important factor determining the overall and negative aspects of FCs' QOL, whereas various environmental factors were associated with positive coping. Appropriate support programs directed at these factors are needed to maintain and improve FCs' QOL. © 2015 John Wiley & Sons, Ltd. Source

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