Histone deacetylase 3 is selectively involved in L3MBTL2-mediated transcriptional repression

Yoo, Jung-Yoon,Choi, Kyung-Chul,Kang, HeeBum,Kim, Young Jun,Lee, Jeongmin,Jun, Woo Jin,Kim, Mi-Jeong,Lee, Yoo-Hyun,Lee, Ok-Hee,Yoon, Ho-Geun Elsevier 2010 FEBS letters Vol.584 No.11

<P><B>Abstract</B></P><P>This is the first report that L(3)mbt-like 2 (L3MBTL2) specifically interacts with the histone deacetylase domain of histone deacetylase 3 (HDAC3) via its MBT domain. Here, we show that L3MBTL2 selectively interacts with HDAC3, but not other class I HDACs. An in vitro peptide-binding assay demonstrated the specific association of HDAC3 with methylated histone-K20 tail and L3MBTL2. Furthermore, depletion of HDAC3 resulted in a decrease of methylated K20-H4, as well as an increase in acetylated histone H3. Consequently, HDAC3 knock-down selectively suppressed L3MBTL2-mediated transcriptional repression. Taken together, our results reveal the concerted action of both HDAC3 and L3MBTL2 in histone deacetylation and methylation-dependent transcriptional repression.</P><P><B>Structured summary</B></P><P>MINT-7719975: <I>L3MBTL2</I> (uniprotkb:Q969R5) and <I>HDAC3</I> (uniprotkb:O15379) <I>colocalize</I> (MI:0403) by <I>fluorescence microscopy</I> (MI:0416)</P><P>MINT-7719941, MINT-7719921: <I>L3MBTL2</I> (uniprotkb:Q969R5) <I>binds</I> (MI:0407) to <I>HDAC3</I> (uniprotkb:O15379) by <I>pull down</I> (MI:0096)</P><P>MINT-7719991: <I>HDAC3</I> (uniprotkb:O15379) <I>physically interacts</I> (MI:0915) with <I>L3MBTL2</I> (uniprotkb:Q969R5) by <I>anti bait coimmunoprecipitation</I> (MI:0006)</P><P>MINT-7719958: <I>L3MBTL2</I> (uniprotkb:Q969R5) <I>physically interacts</I> (MI:0915) with <I>HDAC3</I> (uniprotkb:O15379) by <I>anti tag coimmunoprecipitation</I> (MI:0007)</P><P>MINT-7719897: <I>HDAC3</I> (uniprotkb:O15379) <I>physically interacts</I> (MI:0915) with <I>L3MBTL2</I> (uniprotkb:Q969R5) by <I>two hybrid</I> (MI:0018)</P>

새로운 Acetylcholinesterase inhibitors의 합성

최순규,김형민,조승환,최학기,박유미,이용균,정대일,김인식,한정태 동아대학교 부설 기초과학연구소 2004 基礎科學硏究論文集 Vol.21 No.1

노인성 치매의 일종인 alzheimer's disease의 효과적인 억제제를 합성하기 위해 우리는 분자 모델링에 의한 가장 적합한 물질인 m-[(N,N,N-trimethylammonio)phenyl]boronic acid를 합성하였다. 출발물질인 3-aminophenylboronic acid monohydrate의 경우 boronic acid의 작용기인 hydroxyl group을 protecting시킴으로써 반응의 안정성을 기하였다. Quarternary ammonium salt는 과량의 methyliodide와 염기 촉매인 potassium hydrogen carbonate를 사용하여 용매인 methanol에서 반응시켜 상당히 높은 수율을 얻을 수 있었다. 또한 과량의 methyliodide와 염기촉매인 potassium hydrogen carbonate를 사용하여 용매인 methanol에서 반응시킨 결과 boronic acid의 protection없이도 안정하게 반응이 진행되어짐을 확인할 수 있었다. In order to syntheisize a effective inhibotor for alzheimer's disease, we synthesized m-[(N,N,N-trimethylammonio)phenyl]boronic acid 4 which is designed by molecular modeling form. We protected the hydroxyl group of 3-aminophenylboronic acid monohydrate 1 with ethlyne glycol to remove the reactivity if hydroxyl group. To synthesize m-[(N,N,N-trimethylammonio)phenyl]boronic acid 4, we reacted 3-aminophenylboronic acid monohydrate 1 with ezcess methyl iodide and potassium hydrogen carbonate as a base-catalyst in methanol. but On executed reaction without protection on hydroxyl group, we found out the result that the hydroxyl group of boronic acid group at 3-aminophenylboronic acid monohydrate 1 didn't react with excess methyliodide. Synthesized m-[(N,N,N-trimethylammonio)phenyl]boronic acid 4 is in progress about biological tests as a plausible acetylcholinesterase inhibitor.

당 첨가량에 따른 송이정과의 물성 및 관능 특성

박미란 ( Mi Lan Park ),최수근 ( Soo Keun Choi ),정인창 ( In Chang Jung ),변광인 ( Gwang In Byun ) 한국식생활문화학회 2006 韓國食生活文化學會誌 Vol.21 No.6

농촌지역 노인들의 우울증상에 관련된 요인들의 특성

송미숙,전기홍,송현종,김정은,박승구,신상건,이동훈,정성현,최연주,최완철,최민규,황재철,홍지만 아주대학교 1997 아주의학 Vol.2 No.2

This study was performed to identify risk factors for depression among the elderly in a rural area. A survey was done for the elderly living in Gosam-myenn, Ansung-kun during the period of July 28, 1997 and July 30, 1997. Demographic and sodoeconornic characteristics, and functional and health Status were assessed using a structured questionnaire, and the level of depression was measured by GDS score. The data obtained were analyzed by frequencies, percentage, t-test, ANOVA, and multiple regression, and the results were as follows: 1. The total sample consisted of 133 elderly. Of them, 47 elderly (35.4%) showed significant depressive Symptoms. 2. The GDS score was the highest for the group over 85 years of age (p < 0.05). Those living alone or widowed showed lower GDS score than those living with someone or married (p < 0.05). 3. The GDS score was the highest in the absolutely dependent group, followed by the partially dependent group, and the independent group (p < 0.01). The elderly who perceived their health Status as excellent showed the lowest GDS score. In contrast, those who had more than five chronic diseases showed the highest GDS score. 4. The elderly receiving financial and emotional support from their family or friends showed lower GDS score compared to those without any support. 5. The economically dependent group showed higher GDS score than that of independent group. 6. The elderly who involved in leisure activities showed lower GDS score than those without any involvement. 7. In terms of risk factors for depression, we found that perceived health Status, subjective economic Status, leisure activities, living arrangement and financial support were inversely associated with GDS score, whereas labor support was positively associated with GDS score. Based upon the above findings, this study suggests that these risk factors for depression in the elderly should be taken into consideration for a comprehensive mental health program for the elderly living in the rural area.

우리나라 일부 석면사업장의 석면폐 유병률

백도명,백남원,최정근,손미아,임정기,이원진,문영한,박정선,최병순 大韓産業醫學會 1995 대한직업환경의학회지 Vol.7 No.1

Asbestos industry has been in operation over 60 years in Korea. However, the prevalence of asbestosis has not been yet reported. With rapid turn-over of workers, previous cross-sectional studies of current workers on the job could not find cases with exposures long enough for the development of asbestosis. This study was done to evaluate asbestosis prevalence of those worksites with operation history of more than 20 years. In total, 139 workers from 5 worksites were examined. Asbestos industries covered in the study include 2 asbestos textile, 1 brake lining, and 2 ship repairing worksites. Chest x-ray was taken from all workers and read by two experts familiar with pneumoconiosis classification according to 1980 ILO guidelines. Those with findings compatible with asbestosis were further ckecked with high resolution computerized tomography (HRCT). Pulmonary function tests were done according to ATS guidelines, and occupational and previous medical history was taken through a standardized interview. Air-borne asbestos was measured according to NIOSH method 7400. The air-borne asbestos concentrations ranged from 0.2-1.3 f/cc for asbestos textile, from 0.7-1.0 f/cc for brake lining, and from 6.3-7.8 f/cc during asbestos removal at ship repairing worksite. Of the 139 workers 25 had abnormal chest radiographic findings, and 10 of them had findings compatible with pneumoconiosis. When work history and current asbestos measurements were accounted, 9 workers who had more than 10 years of asbestos exposure history showed chest radiographic findings of pneumoconiosis with Finally, 4 workers showed finding of pulmonary fibrosis and/or pleural thickening at HRCT, and 2 of them had restrictive lung function changes. The study results showed that, among 139 subjects, there were 4(3%) definite asbestosis cases confirmed with HRCT. The prevalence of probable asbestosis was 7% for 10-14 years of exposure, 13% for 15-19 years of exposure, and 23% for 20 or more years of exposure. The prevalence of compensable asbestosis with abnormal lung function was 4-6% for those with 15 or more years of exposure.

한국비서자격시험의 개선점과 비교연구

남자현,이미정,이미영,이아영,정해금,최유정,이미숙,전인선,정혜림 이화여자대학교 법정대학 비서학과 1997 비서학연구 Vol.- No.17

돼지 신장세포(PK15)의 이종이식 거부반응에 대한 재조합 IL-18의 영향

최연실,김은미,김영관,박상연,심정현,윤도영,강형식,명평근 충남대학교 생물공학연구소 2004 생물공학연구지 Vol.10 No.1

Various cytokines including IL-1β, IL-2, IL-4, IL-10, IL-12p40, IFN-γ, and TNF-α have been recently reported to play important roles in both host and donor cell activations during xenotransplantation. Interleukin (IL)-18, a proinflammatory cytokine, can induce IL-4 and IL-13 production in T cells, NK cells, B cells, mast cells, and basophils. IL-18 has the capacity to stimulate innate immunity and both Th1-and Th2- mediated responses, but little is known to involve in the xenograft rejection. In order to investigate the role of IL-18 in xenograft rejection, we transplanted the pig kidney (PK15) cells to C57BL/6 mouse with or without intraperitoneal injection of mouse recombinatant IL-18. It was analyzed the population of T cell, B cell and NK cell in the mice transplanted with PK 15 cells and recombinant IL-18 by flow cytometry. We found that splenic CD3+ T cells were increased in mice injected PK15 cells with recombinant IL-18. These results suggest that recombinant IL-18 is critical in the xenograft rejection by increasing T cell population of the recipients.

영국의 교육

최정웅,조은미 대구효성가톨릭대학교 교육연구소 1994 교육연구논집 Vol.3 No.-

SCORM 기반의 XML 학습 컨텐츠 검색 시스템

최병욱,송미숙,조정원 한국컴퓨터교육학회 2003 컴퓨터교육학회 논문지 Vol.6 No.1

차세대 인터넷 표준 언어인 XML(eXtensible Markup Language)은 데이터(data)와 표현(presentation) 그리고 구조(Structure)가 구분되기 때문에 어느 환경에서나 재사용성이나 재구성이 용이한 장점을 보이고 있다. 본 논문에서는 XML 문서를 가상교육 시스템(Virtual Education System)의 멀티미디어 컨텐츠로 범위를 제한하여 사용자 위주의 효율적인 검색 시스템을 구현한다. 본 시스템에서는 가상교육 표준안으로 제안되고 있는 SCORM(Sharable Content Object Reference Model)에서 정치한 SCO(Sharable Content Object)단위의 메타데이터를 기반으로 컨텐츠를 설계하고 각 문서를 키워드, 엘리먼트, 애트리뷰트 단위로 색인한다. 또한 사용자 인터페이스에서 앨리먼트 검색화면을 구조적으로 구성해줌으로써 사용자가 DTD(Document Type Definition)fl 대한 사전지식 없이도 검색이 가능하며, XML-QL로 재구성된 XML 문서의 형태와 XSL(extensible markup language Stylesneet Language)을 이용한 HTML 형태의 두 가지 결과화면을 제시함으로써 사용자 선택의 폭을 넓혀준다. XML(eXtensible Markup Language), next generation internet standard language has the advantage of easy re-use and re-structure in other computing environment because it has the separate data, presentation and structure. In this paper, we implement the efficient retrieval system for the general user by limiting the XML documents on the multimedia learning contents for the virtual education system. The system design is based on SCO Metadata unit defined in SCORM as the proposed virtual education standard. Each XML documents has three indexes keyword, element and attribute. Also, it makes Possible to retrieve data without previous knowledge of the 078 by making the element retrieval screen structure for the user interface. And it gives the user various result screen formats such as XML and HTML by restructuring the retrieval result through XML-QL and XSL, respectively.

국내 조혈모세포이식 환자에서 Human Cytomegalovirus gB 유전형의 분포와 질환과의 연관성 : 예비 보고

최수미,김진희,이동건,박선희,최정현,유진홍,박철민,이종욱,민우성,황응수,신완식,김춘추 대한감염학회 2007 감염과 화학요법 Vol.39 No.2

목적 : 사람 거대세포바이러스(Human cytomegalovirus, 이하 HCMV) glycoprotein B (gB)는 UL55 유전자에 의해 부호화되는 당단백으로, UL55 유전자의 염기서열변화에 따라 4가지 유전형으로 나뉜다. 본 연구에서는 국내 조혈모세포이식 환자들에서 HCMV gB 유전형의 분포와 그 특성을 알아보고, gB 유전형에 따라 특정 HCMV 질환 발생과 연관이 있는지 그 임상적 의미를 분석해 보고자 하였다. 재료 및 방법 : 동종 조혈모세포이식 환자 52명의 혈액검체 94개에 대해, Chou 등이 제시한 방법에 따라, 먼저 UL55 유전자 부위를 nested PCR로 증폭한 후, RsaI과HinfI으로 Restriction fragment length polymorphism(RFLP) 분석을 시행하였다. 결과 : gB type 1은 73.1% (38/52), gB type 2는 13.5%(7/52), gB type 3는 1.9% (1/52), gB type 1과 type 2에 의한 혼합감염은 9.6% (5/52)로 나타났다. gB type 4는 관찰되지 않았다. 1명(1.9%)에서 gB 유전형을 결정할 수 없었는데, RFLP 패턴으로 보아 Trincado 등이 제시한 gB type 7에 해당하는 것으로 생각되었고, 이 새로운 아형에 대해서는 현재 염기서열 분석 중이다. 52명 중 5명(9.6%)에서 HCMV 질환이 발생하였고, 3명에서 HCMV 폐렴, 1명에서 망막염과 위장관염, 나머지 1명에서 망막염이 발생하였다. 5명 중 HCMV 질환과 관련하여 사망한 예는 없었고, 감염된 HCMV는 모두 gB type 1이었다. HCMV gB유전형과 HCMV 질환 발생 사이에 유의한 연관성은 없었고, 단일 주에 의한 감염과 혼합감염에 따른 HCMV 질환발생 사이에도 유의한 연관성은 관찰되지 않았다. 자료 분석 중 gB type 2에 감염되어 있던 환자에서 gB type 1에 재감염 되면서 발열, 간효소 수치 상승 및 pp65 HCMV 항원혈증이 나타난 예가 있었다. 결론 : 연구결과 gB type 1이 아주 우세하고, gB type 4는 검출되지 않았으며, 혼합감염의 빈도가 비교적 낮은 분포를 보였다. 이는 외국의 보고와는 다른 국내 조혈모세포이식 환자에서의 독톡한 감염 양상으로 추정된다. 본 연구에서 HCMV gB 유전형과 질환 발생과의 연관성을 밝힐 수는 없었으나, HCMV 유전형에 대한 연구는 바이러스 감염의 발병기전이나 전파 경로 및 양식과 같은 역학적 연구에 중요한 자료가 될 것이다. 현재 더 많은 수의 조혈모세포이식 환자를 대상으로 연구가 진행 중에 있으며, 앞으로 다른 질환군의 환자나 건강한 잠복 감염자에서의 추가 연구가 필요할 것으로 생각된다. Background : Human cytomegalovirus (HCMV) glycoprotein B (gB) is the major envelope glycoprotein, encoded by the UL55 gene. Based on sequence variation in the UL55 gene, HCMV can be classified into four gB genotypes. Previous studies have suggested an association between HCMV gB genotypes and clinical outcome in the immunocompromised hosts. The goal of this study was to determine the distribution of HCMV gB genotypes and the effect of gB genotype in the developement of HCMV diseases in hematopoietic stem cell transplant (HSCT) recipients in Korea. Materials and Methods : DNA was extracted from 94 blood specimen of 52 allogeneic HSCT recipients with HCMV infection. HCMV gB genotype was determined using polymerase chain reaction to amplify a region of UL55, followed by restriction fragment length polymorphism (RFLP) analysis based on RsaI and HinfI digestion. Results : The distribution of gB types were as follows: gB1, 73.1% (38/52) of patients; gB2, 13.5% (7/52); gB3, 1.9% (1/52) and mixed infection (gB1 and gB2), 9.6% (5/52). While gB4 was not detected, a new genotype (described as gB7 by Trincado et al, 2000) was identified on the basis of their RFLP pattern. During average 708 days’ follow up period, HCMV diseases developed in 5 patients. All of them had gB1 genotype. There was no statistically significant association between the incidence of HCMV diseases and the gB genotypes. Re-infection with gB1 strain was detected in one patient who had been previously infected with gB2. This episode was associated with fever, elevated liver enzyme and positive antigenemia. Conclusion : HCMV gB1 was the dominant genotype and no gB4 was detected in allogeneic HSCT recipients in Korea, which is an unique pattern compared with the previous reports. Although we can not find significant association between the HCMV diseases and the gB genotypes, genotyping of HCMV will serve in the study of pathogenesis and transmission of this virus in transplant patients. Further study is underway with large study population.