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($H_2O_2$와 ascorbic acid가 사람 치주인대섬유모세포의 TIMP-2, Type 1 collagen, PDLs22 발현에 끼치는 효과
최용선,김소영,최성미,장현선,김병옥,Choi, Yong-Sun,Kim, So-Young,Choi, Seong-Mi,Jang, Hyun-Seon,Kim, Byung-Ock 대한치주과학회 2007 Journal of Periodontal & Implant Science Vol.37 No.4
Reactive oxygen species (ROS) have been implicated in the pathogenesis of various diseases. And vitamin C has shown a protective effect for the tissues. The aim of this study was to evaluate the effects of $H_2O_2$ and ascorbic acid on matrix metalloproteinase-1 (MMP-1), tissue inhibitor of metalloproteinase (TIMP: TIMP-1, TIMP-2), Type 1 collagen, fibronectin, and PDLs22 level in human periodontal ligament fibroblasts (hPDLF) via reverse transcription-polymerase chain reaction (RT-PCR). hPDLF was obtained from a healthy periodontium and cultured in Dulbecco's modified Eagles's medium plus 10% fetal bone serum. The concentration of ascorbic acid in hPDLF was $50{\mu}g/ml$, and that of $H_2O_2$ in hPDLF was 0.03% and 0.00003%. Ascorbic acid only, $H_2O_2$ only and mixture of ascorbic acid and $H_2O_2$ were applied with hPDLF for 1-, 3-, and 30-min. respectively. The gene expression of MMP-1-, TIMP-1-, TIMP-2-, Type 1 collagen-, fibronectin-, and PDLs22-mRNA in hPDLF was analysed via RT-PCR. The results were as follows; 1. hPDLF in response to 30-min. incubation with 0.03% $H_2O_2$ did not show any gene expression. 2. In all the experimental groups, the gene expression of fibronectin mRNA showed the decreased tendency compared to control. 3. In all the experimental groups, the gene expression of TIMP-1 mRNA showed the tendency similar to control. 4. hPDLF in response to 30-min. incubation with 0.03% $H_2O_2$ and ascorbic acid increased mRNA induction for MMP-1. 5. In all the experimental groups, hPDLF increased mRNA induction for PDLs22, collagen type 1, and TIMP-2 compared to control. Within the limited experiments, $H_2O_2$ and ascorbic acid increased mRNA induction for PDLs22, collagen type 1, TIMP-2 in hPDLF. More research will be needed in order to confirm the relative importance of the different roles of ROS and antioxidants in hPDLF from a periodontal regeneration or repair standpoint.
증례보고 : 수술 로봇을 이용한 심방중격결손 수술의 마취
최용선 ( Yong Seon Choi ),곽영란 ( Young Lan Kwak ),전동혁 ( Dong Hyuk Jeon ),홍용우 ( Yong Woo Hong ),박한기 ( Han Ki Park ) 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.52 No.3
Minimally invasive cardiac surgery including robotic technique has become increasingly popular over the last decade. The advantages of such technique include improved cosmesis and healing, and reduced stress response, hospital and intensive care unit stay, and transfusion requirements. Robot-assisted cardiac surgery requires prolonged one-lung ventilation to optimize exposure. Remote-access perfusion requires appropriate positioning of multiple catheters to establish cardiopulmonary bypass. Carbon dioxide insufflation into the thorax can cause hemodynamic instability and carbon dioxide embolism. Limited exposure of the heart may pose difficulties with management of arrhythmia, hemostasis, myocardial protection and de-airing at the end of surgery. Limited access due to robot manipulator would make rapid intervention for cardiopulmonary resuscitation difficult or impossible. This case report describes robot-asssisted atrial septal defect repair and discusses the anesthetic issues associated with minimally invasive cardiac surgery including robotic cardiac surgery. (Korean J Anesthesiol 2007; 52: 371~5)
최용선 ( Yong-Seon Choi ) 한국정책학회 2014 韓國政策學會報 Vol.23 No.4
본 연구에서는 정책 네트워크와 정책 간의 관계를 보다 설득력 있게 설명하고 정책 네트워크 연구의 일반화를 도모하기 위해서는 정책의 유형과 정책 네트워크의 구조를 논리적으로 매칭하는 작업이 요구된다는 인식 하에 정책유형에 따라 정책 네트워크의 구조에 차이가 나타날 것이라는 명제를 도출하였다. 정책의 유형은 강제의 수단과 제공된 편익의 불가분성 두 가지 기준을 통해 분배정책, 재분배정책, 경제적 규제정책, 사회적 규제정책으로 분류하고자 하였고, 각각을 대표하는 사례로서 두뇌한국 21, 종합부동산세, IMT-2000서비스 규제, GMO 안전성 규제를 선정하였다. 한편 정책 네트워크의 구조는 범위, 권력구조, 관계패턴을 통해 살펴보고자 하였으며, 정책유형과 정책 네트워크 간의 관계를 검토하기 위해서 네트워크 분석(SNA)을 사용하였다. 네 가지 사례에 대한 네트워크 분석의 결과, 정책유형별로 네트워크의 범위, 권력구조, 관계패턴에 일정한 패턴으로 차이가 나타나고 있음이 드러났다. This study deduce the premise that policy network structure will appear different depending on policy types to explain relation between policy network and policy types persuasively and advance the generalization of policy network research. Policies can be classified by two dimensions 'types of coercion' and 'types of goods' , and eventually into (1) 'distribution policy', (2) 'redistribution policy', (3) 'economic regulation policy' and (4) 'social regulation policy'. For individual review of these policy types, Brain Korea 21 case was selected on distribution policy, comprehensive real estate holding tax case on redistribution policy, MIT-2000 mobile telecommunication business selection case on economic regulation policy, and GMO safety regulation case on social regulation policy. In the meantime, the issue of defining policy network was reviewed through four elements, range, power structure, and relations pattern that existing policy network researchers commonly proposed. In particular, for more objective comparison of network structure, network analysis was applied. In summary, the above analysis can reach such conclusion that the range, power structure, and relation pattern of policy network may vary systematically depending on distribution policy, redistribution policy, economic regulation policy and social regulation policy.
국가경쟁력과 에너지 선택 -VBN(Value-Belief-Norm) 모형의 적용을 통한 에너지 수요-공급정책수용성 인과구조 분석-
최용선 ( Yong-Seon Choi ),김서용 ( Seoyong Kim ) 한국정책학회 2015 韓國政策學會報 Vol.24 No.2
본 연구는 Stern(2000)의 VBN(Value-Belief-Norm) 모형을 적용하여 에너지 정책에 대한 수용성의 인과구조를 분석하는 데 목적이 있다. 기존 연구들은 에너지 정책 수용성의 결과적 측면에 초점을 두고 이를 결정하는 심층적 인과구조를 간과하고 있었다. 국내 성인남녀 1,500명을 대상으로 한 설문조사 자료를 분석한 결과 첫째, 대중들은 신재생에너지 공급에 초점을 둔 에너지 공급정책에 우호적 태도를 보였지만 세금, 비용부담을 통한 수요억제에 초점을 둔 에너지 수요정책에 대해서는 상대적으로 낮은 수용성을 보였다. 둘째, 매개효과에 대한 모형과 구조방정식 모형 분석을 통해 VBN 모형의 변수들, 즉 가치(values), 신념(beliefs), 개인적 규범(personal norms), 그리고 에너지 정책 수용성(acceptability) 변수 간에 구조적 인과관계와 경로가 존재함을 확인하였다. 본 연구는 이론적 차원에서 Stern(2000)의 VBN 모형이 우리나라 에너지 정책 수용성을 설명하는데 있어 유용한 틀임을 보여준다. 아울러 VBN 모형에서 채택된 개념과 경로에 대한 수정이 필요함을 제시하였다. This study aims to examine the causal structure of acceptance for energy policy by applying Stern(2000)’s VBN(Value-Belief-Norm) Model. Our study bases on the fact that the previous researches heavily focus on the consequential side, disregarding the deep causal structure of acceptance for policy. Based survey data (N=1500), we find that not only socio-demographic variables but also the variables in VBN significantly influence the acceptance of energy policy. Second, in the course of causal process, the fundamental value and norm variable are connected each other and form the sequential chain in causal process. Third, the results from mediating effect and structural equation model shows the structural causal relationships and paths within VBN. Our analysis implies that in terms of theory, VBN is useful framework for explaining the acceptance of energy. Second, in practical terms, it gives information how to make PR and communicate with public to enhance the acceptance of energy policy.