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Effects of Retinoic Acid on Regulation of Cell Cycle in Human Gingival Fibroblasts
You, Suk Joo,You, Hyung Keun 원광대학교 치의학연구소 2002 圓光齒醫學 Vol.11 No.2
Retinoic acid가 새포증식과 분화 그리고 노화에 매우 중요한 역할을 수행하는 것으로 알려져 있다. 그러나 retinoic acid가 인간치은섬유모세포의 세포주기조절에 미치는 영향에 관해서는 아직 연구된바 없다. 따라서 본 연구는 인간치은섬유모세포에 all-rrenr retinoic acid (RA)를 투여하여 세포주기조절에 미치는 영향을 평가하였다. 0.1nM-1μM의 RA는 인간치은섬유모세포의 세포중식을 촉진시켰으며, 그 중 1nM에서 최대증식촉진 효과를 나태냄을 알 수 있었다. 1nM RA를 인간치은섬유모세포에 투여하여 세포주기변화를 관찰한 결과, 세포주기 진행이 대조군에 비하여' 1 nM RA를 투여한 군에서 현저히 증가됨을 관찰할 수 있었다. 따라서 RA가 인간치은섬유모세포의 세포주기조절에 분자기전의 일부를 규명하고자 세포주기조절에 관여하는 유전자의 발현을 관찰하였다. 1nM RA는 cyclin E와 CDK 2의 발현을 증가시켰으며, p21과 p16^INK4A의 발현은 억제하였다. 그러나 1nM RA는 cyclin D, CDK 4, CDK 6 및 p53의 발현에 큰 영향을 주지 않았다. 이러한 결과는 1nM RA가 인간 치은섬유모세포의 세포주기진행을 촉진시키며, 그 분자기전은 cyclin E와 CDK 2의 발현을 증가시키고, 921과 P16^1NK4A의 발현은 억제하여 이루어지는 것으로 추정된다.
You, Joo Hyung,Lee, Se Han,You, Chan Ho,Yu, Yun Seop,Kim, Tae Whan American Scientific Publishers 2010 Journal of Nanoscience and Nanotechnology Vol.10 No.5
<P>A compact model of the current-voltage (I-V) characteristics for the Si nanowire field effect transistor (FET) taking into account dependence of the analytical electrical properties on the diameter and the concentration of the Si nanowire of the FETs with a Schottky metal-semiconductor contact has been proposed. I-V characteristics of the nanowire FETs were analytically calculated by using a quantum drift-diffusion current transport model taking into account an equivalent circuit together with the quantum effect of the Si nanowires and a Schottky model at Schottky barriers. The material parameters dependent on different diameters and concentrations of the Si nanowire were numerically estimated from the physical properties of the Si nanowire. The threshold voltage, the mobility, and the doping density of the Si nanowire and the Schottky barrier height at a metal-Si nanowire heterointerface in the nanowire FET were estimated by using the theoretical model.</P>
Evaluation of improved vaccine for type C Foot-and-Mouth Disease in cattle and pigs
Su-Hwa You(Su-Hwa You),Hye-Eun Jo(Hye-Eun Jo),Joo-Hyung Choi(Joo-Hyung Choi),Mi-Kyeong Ko(Mi-Kyeong Ko),Sung Ho Shin(Sung Ho Shin),Min Ja Lee(Min Ja Lee),Su-Mi Kim(Su-Mi Kim),Byounghan Kim(Byounghan K 한국예방수의학회 2019 한국예방수의학회 학술대회자료집 Vol.2018 No.-
Evaluation of vaccines for the SAT 1, SAT 2, and SAT 3 serotypes of Foot-and-Mouth Disease in pigs
Hye-Eun Jo(Hye-Eun Jo),Su-Hwa You(Su-Hwa You),Joo-Hyung Choi(Joo-Hyung Choi),Mi-Kyeong Ko(Mi-Kyeong Ko),Sung Ho Shin(Sung Ho Shin),Hyundong Jo(Hyundong Jo),Min Ja Lee(Min Ja Lee),Su-Mi Kim(Su-Mi Kim) 한국예방수의학회 2019 한국예방수의학회 학술대회자료집 Vol.2018 No.-
Odor Discrimination Using Neural Decoding of the Main Olfactory Bulb in Rats
You, Kyung-Jin,Ham, Hyoung Geol,Lee, Hyun Joo,Lang, Yiran,Im, Changkyun,Koh, Chin Su,Kim, Mi-Yeon,Shin, Hyung-Cheul,Shin, Hyun-Chool IEEE 2011 IEEE Transactions on Biomedical Engineering Vol.58 No.5
<P>This paper presents a novel method for inferring the odor based on neural activities observed from rats' main olfactory bulbs. Multichannel extracellular single unit recordings were done by microwire electrodes (tungsten, 50 μm, 32 channels) implanted in the mitral/tufted cell layers of the main olfactory bulb of anesthetized rats to obtain neural responses to various odors. Neural response as a key feature was measured by subtraction of neural firing rate before stimulus from after. For odor inference, we have developed a decoding method based on the maximum likelihood estimation. The results have shown that the average decoding accuracy is about 100.0%, 96.0%, 84.0%, and 100.0% with four rats, respectively.</P>
P258 : Clinicohistopathological study of 60 cases of subungual melanoma
( You Jin Lee ),( Jun Hwan Kim ),( Jae Hyung Lee ),( Hyun Tae Shin ),( Ji Ho Park ),( Jong Hee Lee ),( Dong Youn Lee ),( Joo Heung Lee ),( Jun Mo Yang ) 대한피부과학회 2013 대한피부과학회 학술발표대회집 Vol.65 No.2
Background: Subungual melanoma(SUM) is an uncommon variant of melanoma which has poor prognosis. It is more common in Asians than in Caucasians - 2% in Western, 10% in Japan, 25% in Chinese. Objectives: To evaluate clinical and histopathological characteristic features of SUM in Korea Methods: Retrospective chart review of histologically confirmed SUM cases Results: Mean age was 59 years, sexual ratio M:F = 1: 1.2(27:34). Among 20 digits, Thumb (36%) is most frequently occurring site and Great toe(34%) follows. In Breslow depth staging, StageⅠ19%, Stage Ⅱ12%, Stage Ⅲ 6%, Stage Ⅳ 4%, Stage Ⅴ15%. AJCC staging, Stage 0 25%, Stage 1 27%, Stage 2 21%, Stage 3 5%, Stage 4 20% Conclusion: To our knowledge, it is the largest study on the clinicohistopathological feature of SUM in korea. We hope this result will be helpful in understanding SUM`s nature. Both early and late stage took higher proportion in comparison with western study. But it is unclear whether survival rate is lower than western. Further study will be needed.
Notes : S-Adenosyl-L-Methionine Analogues to Enhance the Production of Actinorhodin
( You Hoon Chong ),( Jung Mo Young ),( Jin Young Kim ),( Yu Kyung Lee ),( Kwang Su Park ),( Jun Ho Cho ),( Hyung Jin Kwon ),( Joo Won Suh ),( Yoong Ho Lim ) 한국미생물 · 생명공학회 2006 Journal of microbiology and biotechnology Vol.16 No.7