Jun Young Lee

Catholic University of Korea, Sŏul, Seoul, South Korea

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Publications (239)411.82 Total impact

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    ABSTRACT: Pterygium inversum unguis (PIU) is a rare nail abnormality in which the distal nail bed adheres to the ventral surface of the nail plate, with obliteration of the distal groove. Because of the rarity of this condition, its exact origin is unknown. This disorder can be either congenital or acquired, with or without a family history. The acquired forms may be idiopathic or secondary to systemic connective tissue diseases or other causes such as stroke, neurofibromatosis, leprosy, or the use of nail fortifiers. We present an unusual case of acquired idiopathic PIU of the 10 fingernails in a 22-year-old man.
    Annals of Dermatology 06/2014; 26(3):374-6. · 0.61 Impact Factor
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    ABSTRACT: Aims: Urinary cystatin C has been suggested as a useful biomarker for diagnosis of acute kidney injury (AKI). Multiple myeloma is often complicated by AKI. Therefore, we investigated whether the urinary cystatin C was available for diagnosis of AKI in multiple myeloma. Materials and methods: This study included 39 patients with monoclonal gammopathy of undetermined significance (MGUS) or multiple myeloma. We reviewed the medical records retrospectively and investigated whether urinary γ-globulin and myeloma progression had effects on urinary cystatin C excretion. Results: Spearman's correlation analysis showed that serum β2-microglobulin and serum cystatin C had a significant positive correlation with the urinary cystatin C excretion (r = 0.513, p = 0.001, r = 0.659, p < 0.001) and FEcystatinC (r = 0.585, p = 0.002, r = 0.711, p < 0.001). The GFRcr also had a significant negative correlation with the urinary cystatin C excretion (r = -0.582, p < 0.001) and FEcystatinC (r = -0.474, p = 0.002). In addition, the urinary γ-globulin had a significant positive correlation with the urinary cystatin C excretion (r = 0.678, p < 0.001) and FEcystatinC (r = 0.731, p < 0.001). Urinary γ-globulin was the most significant factor to influence urinary cystatin C excretion in multiple regression test. Conclusion: These results indicate that urinary γ-globulin and myeloma progression can increase the fractional and total excretion of urinary cystatin C. Therefore, it is believed that the urinary cystatin C can be affected by urinary γ-globulin and myeloma progression in the diagnosis of AKI in multiple myeloma. In addition, urinary γ-globulin is believed to be the most significant factor to influence on urinary cystatin C.
    Clinical nephrology 05/2014; 81(5):345-349. · 1.29 Impact Factor
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    Annals of Dermatology 04/2014; 26(2):254-5. · 0.61 Impact Factor
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    ABSTRACT: Balneotherapy, although not a well-established dermatological treatment, is thought to have therapeutic properties for psoriasis and is used as an alternative treatment modality throughout the world.
    Annals of Dermatology 04/2014; 26(2):221-30. · 0.61 Impact Factor
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    ABSTRACT: Bioreducible carboxymethyl dextran (CMD) derivatives are synthesized by the chemical modification of CMD with lithocholic acid (LCA) through a disulfide linkage. The hydrophobic nature of LCA allows the conjugates (CMD-SS-LCAs) to form self-assembled nanoparticles in aqueous conditions. Depending on the degree of LCA substitution, the particle diameters range from 163 to 242 nm. Doxorubicin (DOX), chosen as a model anticancer drug, is effectively encapsulated into the nanoparticles with high loading efficiency (>70%). In vitro optical imaging tests reveal that the fluorescence signal of DOX quenched in the bioreducible nanoparticles is highly recovered in the presence of glutathione (GSH), a tripeptide capable of reducing disulfide bonds in the intracellular compartments. Bioreducible nanoparticles rapidly release DOX when they are incubated with 10 mm GSH, whereas the drug release is greatly retarded in physiological buffer (pH 7.4). DOX-loaded bioreducible nanoparticles exhibit higher toxicity to SCC7 cancer cells than DOX-loaded nanoparticles without the disulfide bond. Confocal laser scanning microscopy observation demonstrate that bioreducible nanoparticles can effectively deliver DOX into the nuclei of SCC7 cells. In vivo biodistribution study indicates that Cy5.5-labeled CMD-SS-LCAs selectively accumulate at tumor sites after systemic administration into tumor-bearing mice. Notably, DOX-loaded bioreducible nanoparticles exhibit higher antitumor efficacy than reduction-insensitive control nanoparticles. Overall, it is evident that bioreducible CMD-SS-LCA nanoparticles are useful as a drug carrier for cancer therapy.
    Journal of Interconnection Networks 04/2014;
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    ABSTRACT: Cholinergic urticaria is a type of physical urticaria characterized by heat-associated wheals. Several reports are available about cholinergic urticaria; however, the clinical manifestations and pathogenesis are incompletely understood.
    Annals of Dermatology 04/2014; 26(2):189-94. · 0.61 Impact Factor
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    ABSTRACT: Purpose: Estimation of body fluid volume in hyponatremia is useful for diagnosis and therapeutic decision-making. Physical examination has been generally used to estimate body fluid volume, but it depends on the physician's abilities. Bioimpedance spectroscopy has been suggested to be a reliable method for the estimation of body fluid volume. Therefore, this study investigated whether bioimpedance spectroscopy could replace physical examination in hyponatremia. Materials and Methods: The study included 30 patients with hyponatremia. At the time of the initial visit, body fluid volume was estimated simultaneously by both physical examination and bioimpedance spectroscopy. Estimation of body fluid status by clinical diagnosis was performed as well, which determined body fluid status corresponds with the most likely cause of hyponatremia (clinical body fluid estimation). Results: The results of body fluid volume estimated by physical examination, bioimpedance spectroscopy, and clinical body fluid estimation showed that 9, 10, and 9 patients, respectively, were hypervolemic; 13, 15 and 16 patients, respectively, were euvolemic; and 8, 5, and 5 patients, respectively, were hypovolemic. Cohen's kappa analysis showed a significant agreement between physical examination and bioimpedance spectroscopy (kappa coefficient, 0.632, p<0.001). In addition, bioimpedance spectroscopy showed a higher level of agreement with clinical body fluid estimation than physical examination (kappa coefficient, 0.602 vs. 0.524). Conclusion: This study suggests that bioimpedance spectroscopy could replace physical examination for estimating body fluid status in hyponatremia. In addition, bioimpedance spectroscopy might correspond better with clinical diagnosis than physical examination in the estimation of body fluid status in hyponatremia.
    Yonsei medical journal 03/2014; 55(2):482-6. · 0.77 Impact Factor
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    ABSTRACT: The hallmark of atherosclerosis in its early pathogenic process is the overexpression of class A scavenger receptors (SR-A) by activated macrophages. In this study, dextran sulfate-coated superparamagnetic iron oxide nanoparticles (DS-SPIONs), as a magnetic resonance (MR) imaging contrast agent of atherosclerosis, was prepared via the facile co-precipitation method using a versatile double-hydrophilic block copolymer comprising of a DS segment (ligand for SR-A) and a poly(glyclerol methacrylate) segment (SPIONs surface-anchoring unit). The physicochemical properties of the DS-SPIONs were investigated using various instruments. DS-SPIONs exhibited high aqueous stability compared to dextran-coated SPIONs (Dex-SPIONs), which were used as controls. The cellular uptake behaviors of DS-SPIONs and Dex-SPIONs were evaluated using Prussian blue assay. Interestingly, the DS-SPIONs were effectively taken up by activated macrophages compared to Dex-SPIONs. However, the cellular uptake of DS-SPIONs by activated macrophages was remarkably reduced in the presence of free DS. These results suggest that activated macrophages internalize DS-SPIONs via receptor (SR-A)-mediated endocytosis. T2-weighted MR imaging of the cells demonstrated that activated macrophages treated with DS-SPIONs showed a significantly lower signal intensity compared to those treated with Dex-SPIONs. Overall, these results suggest that DS-SPIONs may be utilized as a potential contrast agent for atherosclerosis MR imaging.
    Carbohydrate polymers. 01/2014; 101:1225-33.
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  • The Journal of Dermatology 12/2013; · 1.77 Impact Factor
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    Annals of Dermatology 11/2013; 25(4):526-8. · 0.61 Impact Factor
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    ABSTRACT: The successful clinical translation of siRNA-based therapeutics requires efficient carrier systems that can specifically deliver siRNA within the cytosol of the target cells. Although numerous polymeric nanocarriers forming ionic complexes with siRNA have been investigated for cancer therapy, their poor stability and lack of tumor targetability have impeded their in vivo applications. To surmount these limitations, we synthesized a novel type of biodegradable hyaluronic acid-graft-poly(dimethylamioethyl methacrylate) (HPD) conjugate that can form complexes with siRNA and be chemically crosslinked via the formation of the disulfide bonds under facile conditions. The crosslinked siRNA-HPD (C-siRNA-HPD) complexes exhibited high stability in a 50% serum solution, as compared to the uncrosslinked siRNA-HPD (U-siRNA-HPD) complexes and free siRNA. Both the C-siRNA-HPD and U-siRNA-HPD complexes were efficiently taken up by the CD44-overexpressing melanoma cells (B16F10), but not by the normal fibroblast cells (NIH3T3). When the RFP-expressing B16F10 cells were treated with the complexes or free siRNA, the C-siRNA-HPD complexes showed the highest decrease in RFP expression. In vivo studies demonstrated the selective accumulation of C-siRNA-HPD complexes at the tumor site after their systemic administration into tumor-bearing mice, resulting in an efficient gene silencing effect. Overall, these results suggest that the HPD conjugate could be used as an efficient carrier for the tumor-targeted delivery of siRNA.
    Journal of Controlled Release 09/2013; · 7.63 Impact Factor
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    ABSTRACT: Abstract is missing (Quiz).
    Acta Dermato-Venereologica 09/2013;
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    ABSTRACT: An In/Ga-free doping method of zinc oxide (ZnO) is demonstrated utilizing a printable charge transfer doping layer (CTDL) based on (3-aminopropyl)triethoxysilane (APS) molecules. The self-assembled APS molecules placed on top of ZnO thin-films lead to n-type doping of ZnO and filling shallow electron traps, due to the strong electron-donating characteristics of the amine group in APS molecules. The CTDL doping can tune the threshold voltage and the moblity of the ZnO thin-film transistors (TFTs) as one vary the grafting density of the APS moleucles and the thickness of the underneath ZnO thin-films. From an optimized condition, high performance ZnO TFTs can be achieved that exhibit an electron mobility as high as 4.2 cm2/Vs with an on/off current ratio larger than 107. More importantly, the method is applicaple to simple inkjet processes, which lead to produce high-performance depletion load ZnO inverters through selective deposition of CTDL on ZnO thin-films.
    ACS Applied Materials & Interfaces 09/2013; · 5.01 Impact Factor
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    ABSTRACT: Although rarely life threatening, dermatological diseases may have a considerable influence on a patient's quality of life and psychological well-being. As with morbidity and mental distress from other chronic diseases, a skin disorder can be the one of the main causes of depression in the geriatric population. To determine the prevalence of depression in elderly patients with dermatological disease in Korea and to identify factors associated with depression. Patients over the age of 60 years with dermatologic diseases were solicited for a questionnaire survey. The Geriatric Depression Scale (GDS) was used to obtain a patient-based measurement of depression. Additionally, demographic information and medical history were collected. The questionnaire was completed by 313 patients (39.94% men, mean age 69.04 years, mean disease duration 3.23 years). Dermatological disease overall had a significant effect on patients' depression (χ(2)=177.13, p<0.0001), with a mean GDS score of 12.35 (out of 30). The patients who had a GDS score greater than 10 was 62.3% which indicated increased prevalence of mild to severe depression when compared to the general population among whom only 22.22% percent have GDS score greater than 10. In the univariate analysis, physical health, education level, and the presence of concurrent diseases were risk factors for geriatric depression. However, we did not find any demographic or disease related variables that were independent predictors of depression. Geriatric patients with dermatological disease experience an increase burden of depression. Thus, it is important for clinicians to evaluate geriatric patients with dermatologic diseases for depression.
    Annals of Dermatology 08/2013; 25(3):278-84. · 0.61 Impact Factor
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    Annals of Dermatology 08/2013; 25(3):382-4. · 0.61 Impact Factor
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    ABSTRACT: The incidence of overall cancer has increased over time. The incidence of top-ranking cancers has changed in the 1990s and the 2000s. However, few studies have evaluated the trends in metastatic skin cancers during this period. We evaluated the recent trends in incidence, peak age and location of metastatic skin cancers from 1991 to 2010. This 20-yr survey was divided into two decades to determine the trends by comparing the statistics. Out of 694,466 outpatients (1991-2010), 174 (0.025%) were diagnosed with metastatic skin cancer. The incidence of metastatic skin cancer increased significantly from 20.64 per 100,000 outpatients in the 1990s to 28.70 per 100,000 outpatients in the 2000s (P = 0.030). The peak age of skin metastasis shifted from the 40s to the 50s in women, and from the 50s to the 60s in men. The percentage of metastatic skin cancers originating from intra-abdominal organs increased from 10% in the 1990s to 23.1% in the 2000s (P = 0.027). The percentage of metastatic skin cancers located on the abdomen increased from 7.1% in the 1990s to 15.4% in the 2000s (P = 0.011). The higher proportion of metastatic skin cancers located on the abdomen may be related to the increase in skin metastases from intra-abdominal organs.
    Journal of Korean medical science 07/2013; 28(7):1083-8. · 0.84 Impact Factor
  • International journal of dermatology 05/2013; · 1.18 Impact Factor
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    ABSTRACT: Background: Melasma is a common pigmentary disorder which poses substantial therapeutic challenge. Combined therapy may be beneficial in Asians, where mixed type melasma is dominant. Objective: We sought to assess the efficacy and safety of a 1064 nm Q-switched Nd: YAG (1064 QSNY) and a nonablative 1550 nm erbium-doped fractional photothermolysis (NFP) treatment in Asian melasma. Methods: This was a split face study, in which 26 patients were treated with the 1064 QSNY (6 mm spot size, 1.2-1.4 J/cm(2) fluence) for 10 sessions at 2-week intervals to the entire face, and with the NFP (dynamic mode, pulse energy 6-8 mJ/microthermal zone (MTZ); total density 300 MTZs/cm(2)) for five sessions at 4-week intervals to the experimental side of the face. Efficacy variables were modified Melasma Area and Severity Index (mMASI), the physician's global assessment (PhGA), and patient's subjective global assessment (PGA). Safety was evaluated through the reporting of adverse events. Results: The percentage of subjective improvement was virtually identical on both sides. The mMASI corroborated the patients' subjective estimate, both in terms of the degree of improvement and the lack of difference between the 1064 QSNY + NFP and the 1064 QSNY treated sides. No serious side effects were reported in either side. Conclusions: Our findings do not support the hypothesis of NFP providing a substantial benefit in treating the melasma when compared with the lone treatment of the 1064 QSNY.
    Journal of Cosmetic and Laser Therapy 04/2013; · 0.86 Impact Factor
  • International journal of dermatology 04/2013; · 1.18 Impact Factor

Publication Stats

792 Citations
411.82 Total Impact Points

Institutions

  • 2001–2014
    • Catholic University of Korea
      • Department of Dermatology
      Sŏul, Seoul, South Korea
  • 2000–2014
    • Sungkyunkwan University
      • • Department of Polymer Science and Engineering
      • • Department of Chemical Engineering
      Sŏul, Seoul, South Korea
  • 2012–2013
    • Yonsei University Hospital
      • Department of Internal Medicine
      Seoul, Seoul, South Korea
  • 2010–2013
    • International St. Mary's Hospitals
      Chemulpo, Incheon, South Korea
    • Yeungnam University
      • Division of Internal Medicine
      Onyang, South Chungcheong, South Korea
  • 2011–2012
    • Chonbuk National University Hospital
      Sŏul, Seoul, South Korea
    • University of Seoul
      Sŏul, Seoul, South Korea
  • 2009–2012
    • Wonkwang University School of Medicine and Hospital
      Riri, North Jeolla, South Korea
  • 2009–2011
    • Korea Institute of Industrial Technology
      Anzan, Gyeonggi Province, South Korea
  • 2004–2011
    • Chosun University
      • College of Medicine
      Goyang, Gyeonggi, South Korea
    • Korea Institute of Science and Technology
      • Electronic Materials Research Center
      Sŏul, Seoul, South Korea
  • 2001–2011
    • Korea Advanced Institute of Science and Technology
      • • Department of Chemical and Biomolecular Engineering
      • • Department of Chemistry
      Seoul, Seoul, South Korea
  • 2008–2010
    • Seoul National University
      • • College of Medicine
      • • Department of Neuropsychiatry
      Seoul, Seoul, South Korea
    • Chung-Ang University
      • College of Medicine
      Seoul, Seoul, South Korea
  • 2007
    • Soonchunhyang University
      Onyang, South Chungcheong, South Korea
    • Yonsei University
      • Department of Chemical and Biomolecular Engineering
      Seoul, Seoul, South Korea
  • 2006
    • Keimyung University
      • Department of Chemical System Engineering
      Seoul, Seoul, South Korea
  • 1999–2003
    • University of Suwon
      Suigen, Gyeonggi Province, South Korea
  • 2002
    • Catholic University of Daegu
      • Department of Food Science and Nutrition
      Hayang, North Gyeongsang, South Korea