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염혜정,Han Ro,Sol Ji Park,Ju Ho Hong,Bumrae Cho,김화정,Sung Joo Kim,황종익,이병천,안규리,양재석 한국바이오칩학회 2012 BioChip Journal Vol.6 No.1
Porcine islet xenotransplantation is a promising strategy for the treatment of diabetes that overcomes donor shortages. However, islet xenografts are susceptible to oxidative stress and apoptosis. Heme oxygenase-1 (HO-1) has been shown to protect cells from oxidative stress, apoptosis and inflammation. Here, we investigated whether introduction of human HO-1 (hHO-1) into neonatal porcine islet-like cell clusters (NPCCs) can induce beneficial transcriptional changes in NPCCs against cellular stress. NPCCs were transduced with either adenovirus-HO-1 (Ad-HO-1) or control adenovirus-GFP (Ad-GFP). After treatment with hydrogen peroxide (H2O2) for 24 hours, nitrite oxide (NO) production assays were performed to detect oxidative stress. Microarray analysis was performed using a pig oligonucleotide 44 K gene chip. We profiled transcriptional changes to apoptosis, oxidant and inflammatory genes, and real-time PCR analysis was also performed to confirm the microarray results. Survival of NPCCs after treatment with H2O2 was significantly higher in the Ad-HO-1 group (p⁄0.001), and NO production also decreased in the Ad-HO-1 group (p⁄0.01). The microarray results showed that the expression of pro-apoptosis genes such as CASP3, CASP7, CASP10, CIDE-B and CIDE-C was significantly decreased in the Ad-HO-1 virus group (CASP10; p⁄0.05, CASP3, CIDE-C; p⁄0.01, CASP7, CIDE-B; p⁄0.001). We also found that the expression of oxidative stresses genes including COX1, COX2, CYB5A, SDHD and NOS2 was decreased, and that the anti-oxidant genes Gpx1 and SOD2 were increased in the Ad-HO-1 group (NOS2; p⁄0.05, COXI, COX2, CYB5A, SDHD, SOD2, GPX1; p⁄0.001). However, inflammatory gene expression was not significantly changed. Realtime PCR analysis confirmed the results of the microarray analysis. These results shed light on the underlying mechanisms of the protective effects of hHO-1 on porcine islets from cellular stresses and suggest that hHO-1 could be a promising target gene for the production of transgenic pigs that confer improved islet xenograft survival.
Induction of heme oxygenase-1 protects against podocyte apoptosis under diabetic conditions
Lee, Sang Choel,Han, Seung Hyeok,Li, Jin Ji,Lee, Sun Ha,Jung, Dong-Sub,Kwak, Seung-Jae,Kim, Seung Hye,Kim, Dong Ki,Yoo, Tae-Hyun,Kim, Jin Hyun,Chang, Se-Ho,Han, Dae Suk,Kang, Shin-Wook International Society of Nephrology 2009 Kidney international Vol.76 No.8
Heme oxygenase-1 (HO-1) is an anti-oxidant enzyme normally upregulated in response to oxidant injury. Here we determined the role of HO-1 in podocyte apoptosis in glomeruli of streptozotocin-treated rats and in immortalized mouse podocytes cultured in media containing normal or high glucose. HO-1 expression, its activity, the ratio of Bax/Bcl-2 protein, and active caspase-3 fragments were all significantly higher in isolated glomeruli of diabetic rats and in high glucose–treated podocytes. These increases were inhibited by zinc protoporphyrin treatment of the rats or by HO-1 siRNA treatment of the podocytes in culture. The number of apoptotic cells was also significantly increased in the glomeruli of diabetic rats and in high glucose–treated podocytes. Inhibition of HO-1 accentuated the increase in apoptotic cells both in vivo and in vitro. Our findings suggest that HO-1 expression protects against podocyte apoptosis under diabetic conditions.
Language Change : From Syntactic Incorporation to Lexical Compounding
Han, Ho 대한언어학회 1998 언어학 Vol.6 No.2
Han, Ho. 1998. Language Change: From Syntactic Incorporation to Lexical Compounding. Linguistics, 6-2, 67-81. This study explores ongoing structural change with respect to light verb ha- constructions (henceforth, LVC) in Korean. The ha- LVC generates through the process of combining a Sino-Korean(SK) noun with the LV ha-. In the literature this process is considered to be involved with some sort of incorporation in Baker's (1988) sense. In negating an LV complex as V, only one type of negatives is judged perfect. However, it will be shown that there is age variance in terms of acceptability of the other type of negatives. With language acquisition data and historical linguistic theories, I will argue that the structure of the LV ha- complex appears to be currently under change. (Ajou University)
Can Markedness Take Over Subset Principle?
Han, Ho 대한언어학회 1999 언어학 Vol.7 No.2
Han, Ho. 1999. Can markedness Take Over Subset Principle? Linguistics 7-2, 117-127. This study explores whether or not markedness can account for the acquisition data that the subset principle provide explanation for. Goodluck (1991) stipulates that logically the subset principle can be reduced to the notion of markedness. This stipulation is logically quite right, but it overlooks some cases of incongruity among markedness, the subset principle, and children's hypothesis testing. For the former issue, I will consider null subject utterances in child English, while for the latter issue, children's errors will be taken into account, which appear to result from hypothesis testing. I will conclude that markedness and the subset principle need to be considered as separate principles, countering Goodluck's (1991) stipulation. (Ajou University)
Ho-166 부착풍선도자를 이용한 방사선 조사의 돼지 관상동맥 스텐트 재협착 예방 효과
김원 ( Kim Won ),정명호 ( Jeong Myeong Ho ),박옥영 ( Park Og Yeong ),정우곤 ( Jeong U Gon ),박우석 ( Park U Seog ),김주한 ( Kim Ju Han ),안영근 ( An Yeong Geun ),조정관 ( Jo Jeong Gwan ),박종춘 ( Park Jong Chun ),강정채 ( Kang Je 한국지질동맥경화학회 ( 구 한국지질학회 ) 2002 韓國脂質學會誌 Vol.12 No.1
배경 : 국내에서 개발된 방사선 동위원소 Holmium-166 (166Ho)은 주로 베타선을 방출하며, 166Ho을 부착한 풍선도자를 이용하여 돼지 관상동맥 재협착 모형에서 풍선확장술 후 신생내막 증식을 전신적 부작용 없이 안전하고 효과적으로 억제하였음을 보고한 바 있다. 본 연구에서는 돼지 관상동맥 스텐트 재협착 모형에서 스텐트 시술 후 신생내막 증식에 의한 재협착 병변을 166Ho 부착 풍선도자를 이용하여 치료하여 그 효과를 관찰하고자 하였다. 방법
Research Trends in Young Children’s Theory of Mind using Keyword Network Analysis
Han,Yoo-Jin(Yoo-Jin Han),Kim,Ho(Ho Kim) 경인교육대학교 교육연구원 2022 교육논총 Vol.42 No.-
This study aims to investigate the trends in research and find implications for future research to understand the characteristics of young children’s theory of mind from 1997 to 2021. Out of the research papers published in journals in the field of early childhood education, 175 articles that fit the purpose of this study were analyzed using network analysis methods. The summary of the analysis results was as follows: First, in the study of young children’s theory of mind, “theory of mind”, “false belief”, “pretend play”, “emotion”, “executive function”, “social ability”, “story”, “young children”, “peer competence”, and “picturebook” showed high frequency. Second, it can be seen that the network structure for each period gradually changes from the first to the third periods. This demonstrated that while the research of theory of mind was somewhat slow but steadily active, the keywords identified in the early childhood theory of mind study evolved into a broad and rich array. Based on the results of this study, this study suggests diversification of the theory of mind research to perspectives of social cognition development of young children.
한종석,정진호,김영권,Han, Jong-Seok,Jung, Jin-Ho,Kim, Yung-Kwon 한국전기전자학회 1997 전기전자학회논문지 Vol.1 No.1
정지궤도 위성과 지구국간 광통신을 대기상태와 앙각의 함수로써 해석할 수 있는 한모델(Han's model)을 제시하였다. 한모델에서는 대기상태를 맑은날, 구름낀 날, 안개, 헤이즈, 비, 눈의 여섯가지 전형적인 상태로 구분한다. 비트오류을 $10^{-7}$을 만족하는 데이터 전송속도를 한모델을 이용하여 상향링크와 하향링크에 대해 해석하였다. 상향링크시의 포인팅손실이 하향링크시의 대기에 의한 공간 가간섭 저하보다 크기 때문에 데이터 전송속도는 하향링크 보다 오히려 상향링크시에 제한됨을 알 수 있었다. Han's model, which is able to analyze optical communication between earth station and geo-satellite as a function of atmospheric conditions and elevation angles. is presented. In Han's model, atmospheric conditions are roughly classified into six basic types; clear sky, cloud, haze, fog, rain and snow. Data rate satisfying for the BER below $10^{-7}$ is analyzed by Han's model in case of up-link and down-link, respectively. Data rate is more limited by up-link than by down-link because the pointing loss caused by atmosphere on the up-link is greater than the spatial coherence degradation caused by atmosphere on the down-link.
IMF와 관련된 스트레스로 신경정신과를 방문한 환자들의 사회정신의학적 특징
한선호,한상우,정한용 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2
Object : The objective of this study was to evaluate how IMF in Korea influenced the Korean in the psycho-social and neuropsychiatric aspects. Method : First, authors compared the number of the patients who had admitted in Seoul Soonchunhyang university hospital and Chun-an Soonchunhyang hospital between the period of January to September 1997(before IMF), and January to September 1998(after TMF). Second, authors evaluated the demographic factors and clinical characteristics of 84 patients who complained psychiatric symptoms induced by IMF related stresses. Results First, the number of stress related patients after IMF was more than before IMF(increased 31%), which suggests that IMF is the stressor of the people enough for psychiatric intervention. Second, IMF plays the role of the various stressors to Koreans (i.e, unemployment, retirement, economic loss, decreased incomes, familial conflicts, change of residence, urge to unemployed, etc) Third, IMF affects not only the urban clerical workers and merchants' employment and economic state but also the rural farmer and stock-farmers' economic state. Conclusion : IMF affects the Koreans' mental health in various aspects. So, it is important and urge to analyze and solve the IMF stresses which affect Koreans' mental health by psychosocial & community health approach.