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Lee, Ho Sup,Kim, Kihyun,Yoon, Dok Hyun,Kim, Jin Seok,Bang, Soo-Mee,Lee, Jeong-Ok,Eom, Hyeon Seok,Lee, Hyewon,Kim, Inho,Lee, Won Sik,Bae, Sung Hwa,Kim, Se Hyung,Lee, Mark Hong,Do, Young Rok,Lee, Jae Ho Hindawi Publishing Corporation 2014 BioMed research international Vol.2014 No.-
<P>Waldenström's macroglobulinemia (WM) is a B-cell proliferative malignancy characterized by immunoglobulin M monoclonal gammopathy and bone marrow infiltration by lymphoplasmacytic cells. Clinical features and cytogenetics of WM in Asia including Republic of Korea remain unclear. Moreover, no study has reported treatment outcomes in patients with WM treated with novel agent combined with conventional chemotherapy. This study investigated clinical features and assessed treatment outcomes with novel agent and conventional chemotherapy in Republic of Korea. Data from all (<I>n</I> = 71) patients with newly diagnosed WM at 17 hospitals who received chemotherapy between January 2005 and December 2012 were collected retrospectively. The median age of patients was 66 years (range: 37–92 years) and male to female ratio was 5 : 1. Patients treated with novel agent combined chemotherapy displayed higher overall response rate (ORR) compared to conventional chemotherapy alone (92.9% versus 52.6%, <I>P</I> = 0.006). The 5-year overall survival rate was 62.6% (95% confidence interval: 34.73–111.07). Use of novel agents produced higher ORR but survival benefit was not apparent due to the small number of patients and short follow-up duration. Further studies are needed to confirm the efficacy of novel agents in patients with WM.</P>
The Outcomes of Hypertransfusion in Major ABO Incompatible Allogeneic Stem Cell Transplantation
Lee Se Hoon,Park Joon Oh,Jung Chul Won,Park Keunchil,Lee Kyoo Hyung,Lee Mark Hong,Lee Kyung Eun,Park Jinny,Kim Kihyun,Kim Won Seog,Im Young Hyuk,Kang Won Ki,Kim Seon Woo,Lee Je Hwan,Park Se Hoon 대한의학회 2004 Journal of Korean medical science Vol.19 No.1
Anoctamin 1/TMEM16A controls intestinal Cl− secretion induced by carbachol and cholera toxin
Byeongjun Lee,Gyu-Sang Hong,Sung Hoon LEE,Hyungsup Kim,Ajung Kim,Eun Mi Hwang,김지윤,Min Goo Lee,Jin-Young Yang,Mi-Na Kweon,Chung-Ming Tse,Donowitz Mark,Uhtaek Oh 생화학분자생물학회 2019 Experimental and molecular medicine Vol.51 No.-
Calcium-activated chloride channels (CaCCs) mediate numerous physiological functions and are best known for the transport of electrolytes and water in epithelia. In the intestine, CaCC currents are considered necessary for the secretion of fluid to protect the intestinal epithelium. Although genetic ablation of ANO1/TMEM16A, a gene encoding a CaCC, reduces the carbachol-induced secretion of intestinal fluid, its mechanism of action is still unknown. Here, we confirm that ANO1 is essential for the secretion of intestinal fluid. Carbachol-induced transepithelial currents were reduced in the proximal colon of Ano1-deficient mice. Surprisingly, cholera toxin-induced and cAMP-induced fluid secretion, believed to be mediated by CFTR, were also significantly reduced in the intestine of Ano1-deficient mice. ANO1 is largely expressed in the apical membranes of intestines, as predicted for CaCCs. The Ano1-deficient colons became edematous under basal conditions and had a greater susceptibility to dextran sodium sulfate-induced colitis. However, Ano1 depletion failed to affect tumor development in a model of colorectal cancer. We thus conclude that ANO1 is necessary for cAMP- and carbachol-induced Cl− secretion in the intestine, which is essential for the protection of the intestinal epithelium from colitis.
Hong, Woong-Ki,Jo, Gunho,Sohn, Jung Inn,Park, Woojin,Choe, Minhyeok,Wang, Gunuk,Kahng, Yung Ho,Welland, Mark E.,Lee, Takhee American Chemical Society 2010 ACS NANO Vol.4 No.2
<P>We demonstrated a controllable tuning of the electronic characteristics of ZnO nanowire field effect transistors (FETs) using a high-energy proton beam. After a short proton irradiation time, the threshold voltage shifted to the negative gate bias direction with an increase in the electrical conductance, whereas the threshold voltage shifted to the positive gate bias direction with a decrease in the electrical conductance after a long proton irradiation time. The electrical characteristics of two different types of ZnO nanowires FET device structures in which the ZnO nanowires are placed on the substrate or suspended above the substrate and photoluminescence (PL) studies of the ZnO nanowires provide substantial evidence that the experimental observations result from the irradiation-induced charges in the bulk SiO<SUB>2</SUB> and at the SiO<SUB>2</SUB>/ZnO nanowire interface, which can be explained by a surface-band-bending model in terms of gate electric field modulation. Our study on the proton-irradiation-mediated functionalization can be potentially interesting not only for understanding the proton irradiation effects on nanoscale devices, but also for creating the property-tailored nanoscale devices.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2010/ancac3.2010.4.issue-2/nn9014246/production/images/medium/nn-2009-014246_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn9014246'>ACS Electronic Supporting Info</A></P>
Hydrogen-Induced Morphotropic Phase Transformation of Single-Crystalline Vanadium Dioxide Nanobeams
Hong, Woong-Ki,Park, Jong Bae,Yoon, Jongwon,Kim, Bong-Joong,Sohn, Jung Inn,Lee, Young Boo,Bae, Tae-Sung,Chang, Sung-Jin,Huh, Yun Suk,Son, Byoungchul,Stach, Eric A.,Lee, Takhee,Welland, Mark E. American Chemical Society 2013 NANO LETTERS Vol.13 No.4
<P>We report a morphotropic phase transformation in vanadium dioxide (VO2) nanobeams annealed in a high-pressure hydrogen gas, which leads to the stabilization of metallic phases. Structural analyses show that the annealed VO2 nanobeams are hexagonal-close-packed structures with roughened surfaces at room temperature, unlike as-grown VO2 nanobeams with the monoclinic structure and with clean surfaces. Quantitative chemical examination reveals that the hydrogen significantly reduces oxygen in the nanobeams with characteristic nonlinear reduction kinetics which depend on the annealing time. Surprisingly, the work function and the electrical resistance of the reduced nanobeams follow a similar trend to the compositional variation due mainly to the oxygen-deficiency-related defects formed at the roughened surfaces. The electronic transport characteristics indicate that the reduced nanobeams are metallic over a large range of temperatures (room temperature to 383 K). Our results demonstrate the interplay between oxygen deficiency and structural/electronic phase transitions, with implications for engineering electronic properties in vanadium oxide systems.</P>
Lee, Jong-Gun,An, Seongpil,Kim, Tae-Gun,Kim, Min-Woo,Jo, Hong-Seok,Swihart, Mark T.,Yarin, Alexander L.,Yoon, Sam S. American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.40
<P>We have sequentially deposited layers of silver nanowires (AgNWs), silicon dioxide (SiO2) nanoparticles, and polystyrene (PS) nanoparticles on uncoated glass by a rapid low-cost supersonic spraying method to create antifrosting, anticondensation, and self-cleaning glass. The conductive silver nanowire network embedded in the coating allows electrical heating of the glass surface. Supersonic spraying is a single-step coating technique that does not require vacuum. The fabricated multifunctional glass was characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), ultraviolet-visible spectroscopy, and transmission electron microscopy (TEM). The thermal insulation and antifrosting performance were demonstrated using infrared thermal imaging. The reliability of the electrical heating function was tested through extensive cycling. This transparent multifunctional coating holds great promise for use in various smart window designs.</P>
Lee, Jong Gun,Kim, Do-Yeon,Lee, Jong-Hyuk,Kim, Min-woo,An, Seongpil,Jo, Hong Seok,Nervi, Carlo,Al-Deyab, Salem S.,Swihart, Mark T.,Yoon, Sam S. American Chemical Society 2016 ACS APPLIED MATERIALS & INTERFACES Vol.8 No.24
<P>We demonstrate production of nanotextured p type cupric oxide (CuO) films via a low-cost scalable supersonic cold spray method in open air conditions. Simply sweeping the spray nozzle across a substrate produced a largescale CuO film. When used as hydrogen evolution photocathodes, these films produced photocurrent densities (PCD) of up to 3.1 mA/cm(2) under AM1.5 illumination, without the use of a cocatalyst or any additional heterojunction layers. Cu2O particles were supersonically sprayed onto an indium tin oxide (ITO) coated soda lime glass (SLG) substrate, without any solvent or binder. Annealing in air converted the Cu2O films to CuO, with a corresponding decrease in the bandgap and increase in the fraction of the solar spectrum absorbed. Annealing at 600 degrees C maximized the PCD. Increasing the supersonic gas velocity from-450 to-700 m/s produced denser films with greater surface roughness, in turn producing higher PCD. The nanoscale texture of the films, which resembles the skin of a dinosaur, enhanced their performance, leading to one of the highest PCD values in the literature. We characterized the films by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy, scanning electron microscopy, and transmission electron microscopy to elucidate the origins of their outstanding performance. This supersonic cold spraying deposition has the potential to be used on a commercial scale for low cost mass production.</P>