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Kim, S.-H.,Lee, S.-O.,Park, I.-A.,Park, S.J.,Choi, S.-H.,Kim, Y.S.,Woo, J.H.,Park, S.-K.,Park, J.S.,Kim, S.C.,Han, D.J. Blackwell Publishing Inc 2010 Transplant infectious disease Vol.12 No.2
<P>S.-H. Kim, S.-O. Lee, I.-A. Park, S.J. Park, S.-H. Choi, Y.S. Kim, J.H. Woo, S.-K. Park, J.S. Park, S.C. Kim, D.J. Han. Diagnostic usefulness of a T cell-based assay for latent tuberculosis infection in kidney transplant candidates before transplantation.Transpl Infect Dis 2010: <B>12:</B> 113–119. All rights reserved</P><P>Background</P><P>The presence of latent tuberculosis (TB) infection (LTBI) should be evaluated before kidney transplantation. Although a new T cell-based assay for diagnosing LTBI gave promising results, this assay has not yet been compared with the tuberculin skin test (TST) for diagnosing LTBI in renal transplant candidates before transplantation.</P><P>Patients and methods</P><P>All adult patients admitted to a single institute for renal transplantation over a 1-year period were prospectively enrolled. A clinically predictive risk of LTBI was defined as: (i) recent close contact with a person with pulmonary TB; (ii) abnormal chest radiography; (iii) a history of untreated or inadequately treated TB; or (iv) a new infection (i.e., a recent conversion of TST).</P><P>Results</P><P>Of 209 renal recipients, 47 (22%) had a positive TST≥5 mm, 21 (10%) had a positive TST≥10 mm, 65 (30%) had a positive T-SPOT.<I>TB</I> test, and 25 (12%) had an indeterminate T-SPOT.<I>TB</I> test. The induration size of TST was significantly associated with a high positivity rate on T-SPOT.<I>TB</I> (<I>P</I><0.001). Agreement between T-SPOT.<I>TB</I> test and TST≥10 mm was fair (<I>k</I>=0.24, 95% confidence interval 0.11–0.36). However, neither univariate nor multivariate analysis showed any association between the clinical risk for LTBI and positivity on T-SPOT.<I>TB</I> or TST.</P><P>Conclusion</P><P>T-SPOT.<I>TB</I> test was more frequently positive than TST in renal transplant candidates. However, further longitudinal studies are awaited to determine whether the ability of T-SPOT.<I>TB</I> assay to detect LTBI in renal transplant recipients can better predict the development of TB than can TST after transplantation.</P>
Park, E-Y,Kim, W-Y,Kim, Y-M,Lee, J-H,Han, K-H,Weiner, I D,Kim, J Gutenberg 2012 HISTOLOGY AND HISTOPATHOLOGY Vol.27 No.12
<P>Potassium depletion (K?-D) induces hypertrophy and hyperplasia of collecting duct cells, and potassium repletion (K?-R) induces regression of these changes. The purpose of this study was to examine the time courses of the changes in cellular composition, the origin of intercalated cells (ICs) and the mechanism responsible for these changes. SD rats received K?-depleted diets for 1, 7, or 14 days. After K?-D for 14 days some of the rats received normal diets for 1, 3, 5, or 7 days. In the inner stripe of the outer medulla, K?-D increased significantly the number and proportion of H?-ATPase-positive ICs, but decreased the proportion of H?-ATPase-negative principal cells (PCs). However, proliferation was limited to H?-ATPase-negative PCs. During K?-R, the cellular composition was recovered to control level. Apoptosis increased during K?-R and exclusively limited in H?-ATPase-negative PCs. Double immunolabeling with antibodies to PC and IC markers identified both cells negative or positive for all markers during both K?-D and K?-R. Electron microscopic observation showed that ultrastructure of AE1-positive some cells were similar to AE1-negative some cells during K?-R. LC3 protein expression increased significantly and autophagic vacuoles appeared particularly in PCs on days 14 of K?-D and in ICs on days 3 of K?-R. These results suggest that PCs and ICs may interconvert in response to changes in dietary K+ availability and that autophagic pathways may be involved in the interconversion.</P>
Han, S-W,Oh, D-Y,Im, S-A,Park, S R,Lee, K-W,Song, H S,Lee, N-S,Lee, K H,Choi, I S,Lee, M H,Kim, M A,Kim, W H,Bang, Y-J,Kim, T-Y Nature Publishing Group 2009 The British journal of cancer Vol.100 No.2
<P>This prospective study was conducted with the Korean Cancer Study Group to evaluate the efficacy and safety of cetuximab combined with modified FOLFOX6 (mFOLFOX6) as first-line treatment in recurrent or metastatic gastric cancer and to identify potential predictive biomarkers. Patients received cetuximab 400 mg m<SUP>−2</SUP> at week 1 and 250 mg m<SUP>−2</SUP> weekly thereafter until disease progression. Oxaliplatin (100 mg m<SUP>−2</SUP>) and leucovorin (100 mg m<SUP>−2</SUP>) were administered as a 2-h infusion followed by a 46-h continuous infusion of 5-fluorouracil (2400 mg m<SUP>−2</SUP>) every 2 weeks for a maximum of 12 cycles. Biomarkers potentially associated with efficacy were analysed. Among 38 evaluable patients, confirmed response rate (RR) was 50.0% (95% CI 34.1–65.9). Median time-to-progression (TTP) was 5.5 months (95% CI 4.5–6.5) and overall survival (OS) 9.9 months. Eleven patients having tumour EGFR expression by immunohistochemistry with low serum EGF and TGF-<I>α</I> levels showed a 100% RR compared to 37.0% in the remaining 27 patients (<I>P</I><0.001). Moreover, ligand level increased when disease progressed in seven out of eight patients with EGFR expression and low baseline ligand level. No patient exhibited EGFR amplification or K-ras mutations. Gastric cancer patients with EGFR expression and low ligand levels had better outcomes with cetuximab/mFOLFOX6 treatment.</P>
KMT-2016-BLG-0212: First KMTNet-Only Discovery of a Substellar Companion
K.-H. Hwang,H.-W. Kim,D.-J. Kim,A. Gould,M. D. Albrow,S.-J. Chung,C. Han,Y. K. Jung,Y.-H. Ryu,I.-G. Shin,Y. Shvartzvald,J. C. Yee,W. Zang,W. Zhu,S.-M. Cha,S.-L. Kim,C.-U. Lee,D.-J. Lee,Y. Lee,B.-G. Pa 한국천문학회 2018 Journal of The Korean Astronomical Society Vol.51 No.6
We present the analysis of KMT-2016-BLG-0212, a low flux-variation $(I_{\rm flux-var}\sim 20$ mag) microlensing event, which is in a high-cadence ($\Gamma = 4 {\rm hr}^{-1}$) field of the three-telescope Korea Microlensing Telescope Network (KMTNet) survey. The event shows a short anomaly that is incompletely covered due to the brief visibility intervals that characterize the early microlensing season when the anomaly occurred. We show that the data are consistent with two classes of solutions, characterized respectively by low-mass brown-dwarf $(q=0.037)$ and sub-Neptune $(q<10^{-4})$ companions. Future high-resolution imaging should easily distinguish between these solutions.
한인규 ( I K Han ),김현욱 ( H U Kim ),육종융 ( C Y Yuk ),허환녕 ( H Y Huh ) 한국축산학회 1968 한국축산학회지 Vol.10 No.1
This experiment was conducted to develope a method of detection for adulteration of raw milk with spray-dried milk powder. Five ㎖. of milk to be tested was treated with 4 ㎖. of 15% ammonium moybdate solution (w/v). After being shaken, the tube was heated at 77.50℃ for 90 minutes. In order to estimate the intensity of color, the methods involved diluting the 3 ㎖. of the sample treated above to 15 ㎖. with distilled H₂O, precipitating with 10% TCA solution and filtering. The degree of blue color developed upon heating was measured by the coleman spectrophotometer at 490 mμ and hemoglobinometer. An attempt was made to explain the mechanism for which the blue color was developed. The results obtained are summarized as follows; I. Raw milk resulted a light color, whereas the milk which has been reconstituted with spray-dried milk powder gave a deep blue color. There was a highly positive correlation (r=0.94) between the amount of spray-dried milk added in raw milk and intensity of blue color developed. Results revealed that this method could be used to detect 4% of addition of reconstituted milk with spray-dried milk powder. 3. It was also found that there was a positive correlation (r=0.97) between adulteration and Hb-meter reading. Eight percentage or more of adding reconstituted milk could bed erected by Hb-meter reading. 3. It was also found a straight linear relationship (r=0.95) between intensity of blue color and reducing capacity of milk. The reducing capacity of spray-dried milk was much higher than that of raw milk. 4. The cause of developing blue color described in this method could be resulted from the occurrence of inorganic phosphate and reducing capacity of the milk and the difference in blue color was due to the difference in reducing capacity between raw and reconstituted milk.
나선 그루브형 열사이폰의 작동유체의 변화에 대한 응축열전달 성능에 관한 연구
한규일(K.I.Han),조동혁(D.H.Cho),박종운(J.U. Park),이상진(S.J.Lee) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
This study concerns tile performance of condensing heat transfer in two-phase closed thenl1osyphons with various helical grooves. Distilled water, methanol, ethanol have been used as the working fluid. In the present work, a copper tube of the length of 1200mm and 14.28nml of inside diameter is lISed as the container of the thermosyphon. Each of the evaporator and the condenser section has a lengtl1 of 55Orrun, wltile the remaining part of the thelmosyphon tube is adiabatic section. A experimental study was canied out for analyzing tIle pe:1iormances of having 50, 50, 70, 80, 90 helical grooves. A plrtin thennosyphon having tile same inner and outer diameter as ilie grooved iliennosyphons is also tested for the comparison. The type of working fluid and the numbers of grooves of the tllennosyphons with vmious helical grooves have been used as the expelirnental parameters. The expelimental results have been assessed and cornpm'ed with existing theories. The results show tlmt tJle type of working fluids are very imporumt factors for tlle operation of tl1ennosyphons. And the maximum enhancement (i.e. the ratio of the heat transfer coefficients tJle helical tlu~nnosyphons to plain tl1ermosyphons) is 1.5- 2 for condensation.
Kim, K.H.,Lee, J.Y.,Kwun, M.J.,Choi, J.Y.,Han, C.W.,Ha, K.T.,Jeong, S.I.,Jeong, H.S.,Joo, M. Elsevier Sequoia 2016 Journal of Ethnopharmacology Vol.192 No.-
Ethnopharmacological relevance: Mahaenggamseok-tang (MHGST), an herbal formula in traditional Asian medicine, has been used to treat patients with various pulmonary diseases including common cold and influenza. However, the potential therapeutic effect of MHGST on acute lung injury (ALI), a leading cause of death worldwide, and the anti-inflammatory mechanisms of MHGST remained less understood. Materials and methods: The methanol extract of MHGST was prepared and fingerprinted by HPLC. For the induction of ALI, C57BL/6 mice (n=5/group) received a single intraperitoneal (i.p.) injection of LPS. Referring to the dose for patients, two different amounts of MHGST were delivered in an aerosol to mouse lungs via trachea 2h after the i.p. LPS administration. Lung histology, bronchoalveolar lavage fluid, myeloperoxidase (MPO) activity, and the expression of inflammatory and Nrf2-dependent genes were analyzed to determine the effect of MHGST on lung inflammation. For mechanistic studies, western blotting and semi-quantitative RT-PCR were conducted using RAW 264.7 cells. Results: When administered 2h after the onset of ALI, MHGST relieved lung pathology characteristic to ALI, with decreases of neutrophil infiltration and MPO activity. While suppressing the expression of inflammatory genes, MHGST increased the expression of Nrf2-dependent genes in ALI mouse lungs. Concordantly, MHGST activated Nrf2 activity while suppressing NF-κB in RAW 264.7 cells. Conclusion: MHGST suppressed neutrophilic lung inflammation, a hallmark of ALI, which was associated with the activation of anti-inflammatory Nrf2 and the suppression of pro-inflammatory NF-κB. Our results suggest that MHGST has a therapeutic potential against ALI.