법랑모세포 분화와 성숙과정에서 OD314의 발현

박주철,안성민,김흥중,정문진,박민주,신인철,손호현 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.5

법랑모세포는 법랑질을 형성하고 유지하는 세포로, 법랑질의 유기기질을 분비하고 법랑질 석회화 과정에도 관여한다. 치아 발생과정에서 법랑모세포의 분화는 순차적인 상피-간엽 상호작용에 의하여 조절되나, 분화나 성숙과정의 정확한 기전은 아직까지 잘 알려져 있지 않다. 최근에 상아모세포에서 처음 발견된 OD314가 치아 발생과정에서 상아질을 형성하는 상아모세포 뿐 아니라 법랑모세포에도 발현된다고 하였다. 이에 본 연구에서는 생쥐 하악 전치의 다양한 시기의 법랑모세포를 이용하여, 형태학적 분석과 in-situ hybridization에 의한 OD314 mRNA의 발현 그리고 OD314 항체를 이용한 면역조직화학적 분석을 통하여 OD314 유전자의 법랑 모세포 분화와 성숙과정에서의 역할을 연구하여 다음과 같은 결과를 얻었다. 1. 형태학적으로 법랑모세포는 분화 단계에 따라 분비 전단계 법랑모세포, 분비기 법랑모세포, 성숙기의 평탄끝 법랑모세포와 성숙기의 주름끝 법랑모세포로 구분되었다. 2. OD314 mRNA는 분비기의 법랑모세포에서부터 발현되기 시작하여 법랑모세포가 성숙해갈 수록 그 발현이 증가하였다. 3. OD314 단백질은 분비 전단계의 법랑모세포에서는 발현되지 않고, 분비기의 법랑모세포에서는 세포질에 전체적으로 발현되었다. 성숙기의 평탄끝 법랑모세포와 주름끝 법랑모세포에서는 세포의 근심과 원심끝단에 OD314 단백질이 강하게 발현되었다. 이상의 결과를 종합하여 OD314는 법랑모세포의 분화와 성숙과정에서 세포질 내부에서 특징적인 역할을 하는 것으로 사료된다. Ameloblasts are responsible for the formation and maintenance of enamel which is an epithelially derived protective covering for teeth. Ameloblast differentiation is controlled by sequential epithelial-mesenchymal interactions. However, little is known about the differentiation and maturation mechanisms. OD314 was firstly identifled from odontoblasts by subtraction between odontoblast/pulp cells and osteoblast/dental papilla cells, even though OD314 protein was also expressed in ameloblast during tooth formation. In this study, to better understand the biologcal function of OD314 during amelogenesis, we examined expression of the OD314 mRNA and protein in various stages of ameloblast differentiation using in-situ hybridization and immunohistochemistry. The results were as follows : 1. The ameloblast showed 4 main morphological and functional stages referred to as the presecretory, secretory, smooth-ended, and ruffle-ended. 2. ○D314 mRNA was expressed in secretory ameloblast and increased according to the maturation of the cells. 3. OD314 protein was not expressed in presecretory ameloblast but expressed in secretory ameloblast and maturative ameloblast. OD314 protein was distributed in entire cytoplasm of secretory ameloblast. However, OD314 was localized at the proxiamal and distal portion of the cytoplasm of smooth- ended and ruffle-ended ameloblast. These results suggest that ○D314 may play important roles in the ameloblast differentiation and maturation.

담도결석의 임상적 연구

송인상,임철,손기섭 충남대학교 의과대학 지역사회의학연구소 1989 충남의대잡지 Vol.16 No.2

The chole lithiasis of the biliary system is one of the most common diseases which are hospitalized and treated surgically in the field of general surgery. A retrospective study of 175 patients who admitted and treated surgically with chole lithiasis at the department of general surgery of Chung-nam National University Hospital from March 1987 to September 1989 was performed. The results are as follow: 1. The peak incidence of chole lithiasis was 6th decade, 32.0% and followed by 7th decade, 20.0% and 5th decade, 17.7%, and the ratio of females and males is approximately 5:4. 2. The stones are most farequently found in the gall bladder 62.3%, and followed by in the common bile duct 56.6%, and in the intrahepatic duct 24.2%. 3. The most common symptoms and signs are pain, 96.6%, tenderness, 67.4%, and fever and chill 66.9%, and over 60% of patients were suffered from less than 3 months. 4. The results of culture shows the E.coli was found in 37.0% and klebsiella 12.3% of patients. 5. The laboratory finding reveals that moderated elevation of SGOT, SGPT, and alkaline phosphatase in about 40%, and 50% of patients. 6. The major operative procedures are cholecystectomy, choledochotomy and T-tube drainage in 49.1% of patients and cholecystectomy only in 32.9% of patients. 7. The major associated diseases are cholecystitis in 37.1%, cholangitis in 15.0% and gall bladder empyema in 12.0%. 8. The most common complication is wound infection n 12.0% of patients and followed by residual stone in 9.0% of patients. 9. The overall mortality rate is 1.2% and the causes of death are one case of sepsis and one case of bile peritonitis.

하계 실내 및 실외환경의 공기 중 휘발성 유기화합물 농도 및 개인노출

양원호,손부순,박종안,장봉기,박완모,김윤신,어수미,윤중섭,류인철 한국환경과학회 2003 한국환경과학회지 Vol.12 No.9

Volatile organic compounds (VOCs) are present in essentially all natural and synthetic materials from petrol to flowers. In this study, indoor and outdoor VOCs concentrations of houses, offices and internet-cafes were measured and compared simultaneously with personal exposures of each 50 participants in Asan and Seoul, respectively. Also, factors that influence personal VOCs exposure were statistically analyzed using questionnaires in relation to house characteristics, time activities, and health effects. All VOCs concentrations were measured by OVM passive samplers (3M) and analyzed with GC/MS. Target pollutants among VOCs were Toluene, o-Xylene, m/p-Xylene, Ethylbenzene, MIBK, n-Octane, Styrene, Trichloroethylene, and 1,2-Dichlorobenzene. Indoor and outdoor VOCs concentrations measured in Seoul were significantly higher than those in Asan except Ethylbenzene. Residential indoor/outdoor (I/O) ratios for all target compounds ranged from 0.94 to 1.51 and I/O ratios of Asan were a little higher than those of Seoul. Relationship between personal VOCs exposure, and indoor and outdoor VOCs concentrations suggested that time-activity pattern could affect the high exposure to air pollutant. Factors that influence indoor VOCs level and personal exposure with regard to house characteristics in houses were building age, inside smoking and house type. In addition insecticide and cosmetics interestingly affected the VOCs personal exposure. Higher exposure to VOCs might be caused to be exciting increase and memory reduction, considering the relationship between measured VOCs concentrations and questionnaire (p<0.05).

법랑모세포 분화와 법랑질 형성과정에서 OD314, Apin protein의 발현 및 기능

박종태,최용석,김흥중,정문진,오현주,신인철,박주철,손호현 대한치과보존학회 2006 Restorative Dentistry & Endodontics Vol.31 No.6

본 연구에서는 법랑모세포 분화와 법랑질 형성에 연관이 있는 OD314 일명 Apin protein의 기능을 밝힐 목적으로, in-situ hybridization에 의한 OD314 mRNA 발현과 법랑모세포 세포주에서 OD314 enamel matrix protein의 발현, 그리고 OD314 유전자를 과발현/억제시킬 수 있는 construct를 제작한 후 법랑질 형성 중에 OD314의 기능을 알아보고자 RT-PCR를 시행하여 다음과 같은 결과를 얻었다. 1. OD314 mRNA는 발생중인 상아모세포보다 법랑모세포에서 강하게 발현되었다. 2. Tuftelin은 석회화 결정이 형성되는 14일까지 발현이 지속되고, 그 이후부터 점차 감소하였다. Amelogenin과enamelin은 7일부터 그 발현이 점점 감소하였다. 3. U6-OD314 siRNA construct를 이용하여 transfection한 법랑모세포 세포주는 OD314와 tuftelin,MMP2 mRNA 발현이 감소하였으며, CM-OD314를 transfection하여 OD314의 과발현을 유도한 경우에는 OD314와 MMP20 mRNA의 발현이 뚜렷이 증대되었다. 이 결과는 OD314가 법랑모세포의 분화와 법랑질의 형성 그리고 석회화 과정에 중요한 역할을 하는 새로운 인자임을 시사한다. This study was aimed to elucidate the biological function of OD314 (Apin protein), which is related to ameloblast differentiation and amelogenesis. Apin protein, calcifying epithelial odontogenic (pindborg) tumors (CEOTs)-associated amyloid, were isolated from CEOTs, and has similar nucleotide sequences to OD314. We examined expression of the OD314 mRNA using in-situ hybridization during tooth development in mice. Expression of OD314 and several enamel matrix proteins were examined in the cultured ameloblast cell line up to 28 days by reverse transcription-polymerase chain reaction (RT-PCR) amplification. After inactivation and over-expression of the OD314 gene in ameloblast cell lines using U6 vector-driven RNA interference and CMV-OD314 construct, RT-PCR were performed to evaluate the effect of the OD314 during amelogenesis. The results were as follows: 1. In in-situ hybridization, OD314 mRNAs were more strongly expressed in ameloblast than odontoblast. 2. When ameloblast cells were cultured in the differentiation and mineralization medium for 28 days, the tuftelin mRNA expression was maintained from the beginning to day 14, and then gradually decreased to day 28. The expressions of amelogenin and enamelin were gradually decreased according to the ameloblast differentiation. 3. Inactivation of OD314 by U6-OD314 siRNA construct down-regulated the expression of OD314, MMP-20, and tuftelin, whereas over-expression of OD314 by CMV-OD314 construct up-regulated the expression of OD314 and MMP-20 without change in tuftelin. These results suggest that OD314 is considered as an ameloblast-enriched gene and may play the important roles in ameloblast differentiation and mineralization.

2003년 국내 중증급성호흡기증후군 진료 현황 및 문제점 분석

이진수,김은실,정문현,백제중,정선화,안주희,최영화,이선희,고철우,김성범,김민자,박승철,기현균,송재훈,최상호,김양수,이상오,조용균,박영훈,정숙인,김연숙,이흥범,손창희,장성희,정희진,김우주 대한감염학회 2004 감염과 화학요법 Vol.36 No.3

목적 : 2002년 말 중국에서 SARS가 발생한 이후 국내에서도 2003년 10월까지 총 3명의 추정환자, 17명의 의심환자가 보고되었다. 향후 추가적인 SARS의 유행이 우려되는 상황에서, 그간의 SARS 환자 진료에 있어서의 실질적인 준비사항, 진료 현황 등에 대한 조사를 통해 문제점을 파악하여, 향후 더 나은 대비가 될 수 있도록 개선점을 제시하고자 하였다. 재료 및 방법 : SARS로 의심되는 환자를 진료 경험이 있는 병원의료진을 대상으로 2003년 10월에 설문조사를 실시하였다. 설문에는 SARS 환자 진료 시의 실질적인 조치, 진료 현황, 병실, 응급실 및 외래에서의 격리 시설과 준비사항, 보건당국의 관리와 지원에 관한 사항을 포함하였다. 결과 : 대상이 되는 22개 병원 중 17개(17/22, 77.2%) 병원이 설문에 응하였다. SARS 환자를 위한 격리실은 응급실, 외래, 일반병실 및 중환자실에서 각각 9개(9/17, 52.9%), 5개(5/17, 29.4%), 15개(15/16, 93.7%), 4개(4/16, 25%) 병원에서 음압처리가 되어있지 않은 일인실 혹은 다인실이 사용되었고, 1개(1/16, 6.3%) 병원에서만 일반병실에서 음압격리실이 운영되었다. 입원환자의 진찰 시 개인보호구의 착용은 거의 모든 의료기관에서 이루어졌다. 보건당국에서 SARS지정병원의 시설 등을 사전에 확인한 곳은 1곳(1/12, 8.3%)이였고, 14개 병원(14/15, 93.3%)에서는 보건당국에 의뢰한 검사결과를 통하 받지 못하였다. 결론 : 의료기관에서 SARS 환자용 격리실뿐만 아니라 기존의 격리실 설비 등이 미흡하였으며, 특히 중환자실 및 외래의 준비가 더욱 부족하였다. 보건당국의 의료기관에 대한 종합적인 지원이 부족하였고, 병원과의 원활한 연계가 잘 이루어지지 않았다. SARS 만이 아닌 격리를 필요로 하는 질환의 적절한 진료를 위해 향후 병원 시설의 정비와 정부차원에서의 보다 구체적이고 실질적인 대책마련이 필요하다. Background : There was an worldwide outbreak of the Severe Acute Respiratory Syndrome (SARS) originated from China in late 2002. During that period three cases of suspected SARS and 17 cases of probable SARS were reported in Korea. With the concerns about the reemergence of SARS-coV transmission, it is important to be prepared for any possibility. So, this study is aimed to analysis the past measures in managing SARS and propose the amendatory plans to improve the preparedness. Materials & Methods : Questionnaires were collected among clinicians with any experience in managing the probable or suspected SARS cases in Oct. 2003. 17 out of 22 hospitals responded to the questionnaire. The contents in the questionnaire were practical activities, personal equipments, response plans, isolation facilities in emergency centers, outpatient clinics, general wards and intensive care units, and relationship with the public health department. Results : The dedicated isolation rooms in emergency centers, outpatient clinics, general wards, and intensive care units were prepared in 9 (9/17, 52.9%), 5 (5/17, 29.4%), 15 (15/16, 93.7%), and 4 (4/16, 25.0%) hospitals, respectively. Except for one hospital that newly made negative pressure room for SARS, single or multi-bed rooms without airborne infection control were used in all the other hospitals. The personal precaution principles were kept quite well in general wards. Before the designation of SARS hospital by the public health department prior evalution to see if the hospital was suitable for managing SARS was conducted in only 1 (1/12, 8.3%) hospital. The results of laboratory diagnosis were reported back in 1 (1/15, 6.6%) hospital. Conclusions : The isolation facilities which can control airborne infection were almost deficient not only for SARS but also for other respiratory transmissible diseases. For the infection control of transmissible diseases including SARS, more investment is needed on medical facilities and comprehensive support from the public health department required.

생약 추출물이 세포성장 및 cytokine 생산에 미치는 영향

류인철,손성희,정종평,배기환 충남대학교 약학대학 의약품개발연구소 1993 藥學論文集 Vol.9 No.-

The native connective tissue attachment of the periodontium is known to be a complex consisting of gingival fibroblasts, periodontal ligament cells, gingival epithelial cells, cementum, alveolar bone and extensive extracellular matrix (collagen, glycoprotein and proteoglycans). The purpose of this study was to evaluate the effects of natural extracts on DNA, collagen and protein synthesis and inhibition of cytokine production in the gingival and periodontal ligament fibroblasts and gingival epithelial cells. Healthy gingibal tissue was obtained from orthodontic treatment patients, and gingival epithelial cells, gingival fibroblasts and periodontal ligament cells were isolated and cultured from the samples. After treated with Ginseng protein, Pluronic F-68, Scutellariae Radix, centella asiatica, PDGF, IGF, DNA synthesis, total protein and collagen synthesis, and cytokine production of gingival epithelial cell, gingival fibroblast and periodontal ligament cells were measured. MTT method for DNA synthesis, Peterkofsky and Dingerman method for total protein and collagen synthesis, and IL-1 ELISA kit for cytokine production were used. The proliferation of epithelial cells was enhanced in Centella asiatica, Ginseng protein, Pluronic F-68 and Scutellariae Radix. The activities of PDL cells were increased in PDGF, IGF, and Pluronic F-68. Higher collagen synthesis was observed in Scutellariae Radix and total protein synthesis was increased in Scutellariae Radix and PDGF. The inhibitory effects on IL-1, IL-6, TNF-α were observed in all exrracts.

Putrescine처리가 절화 카네이션 'Desio'의 화판 노화에 미치는 영향 : Ethylene 발생, ACC synthase, EFE 활성변화 Change of ethylene production and ACC synthase and EFE activities

이인국,권혜정,손기철 建國大學校 附設 農業資源開發硏究所 1993 農資源開發論集 Vol.18 No.-

절화 카네이션 'Desio' 품종의 화판 노화시 발생되는 에칠렌의 발생량은 계절에 따라 달라 2월경 채화된 것은 약 70nl/g·FW/hr를 나타내었으나, 7월에 채화된 것은 4.3nl/g·FW/hr 불과했다. 폴리아민 중 put의 10mM 처리는 EFE의 활성과 에칠렌의 발생을 억제시키고 화판의 노화를 지연시켰으나, 대조구나 put 1Mm의 처리구에 비해 높은 ACC synthase의 활성을 나타내었다. 한편, 1mM put 처리는 ACC synthase의 활성이 억제됨에도 불구하고 에칠렌이 생성되어졌다. 이러한 사실은 기작이 명확치 않으나 put처리가 에칠렌 생합성 과정중 EFE보다 ACC synthase의 활성에 직접적인 영향을 미치는 것을 나타내며, 내생 폴리아민의 농도에 따라 외생 폴리아민의 카네이션 화판의 노화에 미치는 영향이 다름을 나타낸다. Ethylene evolution on the senescence of petals of cut carnation cv. Desio was varied according to the cultural seasons, where 70 ul/g·fw/hr of ethylene was produced in Feb. harvest, but only 4.3 ul/g·fw/hr in July. Despite that 10mM putrescine treatment on the petals inhibited ethylene production and EFE activity, and delayed the senescence, it rapidly stimulated ACC synthase activity over those of control and 1mM putrescine treatment. In addition, ethylene was produced in the 1mM putrescine treatment even though ACC synthase acitiviy was inhibited. This fact indicates that purtrescine has influence on rather EFE than ACC synthase on the biosynthesis of ethylene and the effect of exogenous polyamines on the senescence is varied according to the level of endogenous polamines in the petals of cut carnation.

남성화를 보이는 여성에서 발견된 난소의 Steroid Cell Tumor 1예

조인호,정대훈,박영미,서영진,손영실,정철회,강영미,정수전,김영남,이경복,성문수,김기태 인제대학교 2006 仁濟醫學 Vol.27 No.-

Steroid cell tumor is a rare ovarian sex cord-stromal tumor which accounts for 0.1% of all ovarian tumors. Until now, only 4 cases have been reported in domestic literatures. Steroid cell tumor often secrets testosterone and presents virilization in adult women or precocious puberty in children. Treatment is often performed by surgical removal, adjuvant chemotherapy and radiation, but completely accepted treatment was not existed. We experienced a case of steroid cell tumor, which was manifested by typical virilization in a 43-year old patient, who was previously performed hysterectomy and unilateral oophorectomy. So, we present with a brief review of the literatures.

과수 조류피해 방지에 관한 연구

김영호,윤철구,임상철,손인창,박재혁,김동환,김선규 충북대학교 한국과학재단 지정 첨단원예기술개발 연구센터 2002 연구보고서 Vol.6 No.-

새로운 저비용 고효율 조류 피해 방지법의 개발을 위한 기초자료를 얻기 위하여, 현재 사과, 배 과수원에서 사용되고 있는 조류피해 방지 방법들의 정확한 효과를 서로 비교 검토하고, 아울러 충북지역 과수 재배 농가들을 대상으로 유해조류에 의한 피해 실태와 경제성 있는 조류 피해방지 방법에 대한 설문조사를 병행 실시한 결과는 다음과 같다. 1. 조류피해는 방조망 설치에 의해서만 완전히 방지할 수 있었으며, 조류 피해율별 손익계산 결과를 참고하여 이익이 있을 때는 표준방조망을 설치하고, 그렇지 않을 경우에는 설치비가 저렴하며 농가에서 간단히 시공할 수 있는 간이방조망 설치가 더 경제적인 것으로 판단되었다. 도내 과수 농가의 조류피해는 지역 간에 큰 차이가 있었으며, 음향적 방제인 버드가드와 보호봉지인 망사봉지에 의한 방제가 가장 효과적이었다. 그러나 버드가드는 높은 설치비용이 문제되므로, 퇴치 효과가 비슷하거나 더 우수하면서 저렴한 한국식 음향 기구를 개발할 필요가 있는 것으로 판단되었다. 보호봉지인 UV 봉지와 플라스틱 보호캡 및 망사봉지 처리는 품종에 관계없이 피해를 현저하게 감소시켰으나, 과실의 착색 등 품질에 미치는 영향에 대해서 추가적인 연구와 검토가 필요한 것으로 생각되었다. To obtain basic data for low cost-high efficiency control methods for bird damage, the available control methods currently in use mostly in Chungbuk Province were tested on site, and the control efficiency was compared. Also, a comprehensive survey of actual bird damage and the control methods on model apple and pear growers in Chungbuk Province was conducted. The results are summarized as follows. The perfect control for bird damage was possible only through bird net, it was recommended that profit-and loss account must be considered before installing bird net, and when the 'standard bird net' does not come up to break-even point, more economic and convenient 'simplified bird net' should be a alternative. Actual extent of bird damage varied according to the locality, and imported acoustic apparatus BirdGard^R, development of our own system with superior or same quality and reasonable price is necessary. Fruit bags such as UV bags, plastic protective caps, and net bags were highly effective for bird damage control, irrespective of fruit species and cultivar, but further study to resolve some problems such as poor coloration caused by bagging is necessary.

반코마이신-내성 장구균이 분리된 중증 화상환자의 특성 및 사망인자에 대한 분석

변현우,김철홍,김진경,손광표,한승용,김영순,우흥정,현인규,김종현,이규만 대한감염학회 2005 감염과 화학요법 Vol.37 No.5

목적 : 국내에 1992년에 VRE가 처음 보고된 이후, 주요 원내 감염균이 되었다. 특히 중증의 화상환자는 전신쇠약, 면역기능의 저하 및 항균제 사용으로 인한 장내 집락화균의 변화 등으로 인해 VRE감염에 취약하다. 저자들은 VRE가 검출된 중증 화상환자의 임상적 특성 및 사망에 기여하는 위험요인을 알아보고자 본 연구를 하였다. 재료 및 방법 : 2000년 1월부터 2003년 12월 까지 VRE가 분리된 화상범위가 체표면적의 30%이상인 중증 화상환자를 대상으로 의료기록을 통하여 후향적으로 조사하였다. 이들을 VRE 집락화군(직장도말검사 양성군)과 감염군(직장이외의 임상검체에서 분리된 군)으로 나누어 임상적 특성, 선행질환을 조사 비교하였다. VRE 감염군에서 사망군과 생존군으로 나누어 사망과 관련된 인자를 분석하였다. 결과 : 104명의 환자에서 144 VRE가 분리되었으며 평균 연령은 41.6±18.2세였다. 대상 환자들의 평균 화상 체표면적은 45.4±22.1% 였다. VRE 집락화군에서 20.4%(19/93)가 VRE 감염으로 진행되었다. 집락화군과 감염군에서 임상특성, 기저질환, 분리균종의 차이는 없었다. VRE 감염군의 사망률은 40%를 보였다. VRE 감염군의 사망과관련된 인자는 다변량분석 결과 VRE의 균혈증이었다[교차비=32.803, 95% 신뢰구간(2.884, 373.129), P값 0.005]. 결론 : 중증 화상환자에서 VRE가 집락화된 환자의 상당 수가 VRE 감염으로 진행할 수 있으며 이들 환자에서 VRE 감염증의 사망률은 40%를 보이므로 VRE의 집락화를 막기 위한 노력에 더욱 주의를 기울여야 할 것으로 사료된다. Background : Vancomycin-resistant enterococci (VRE) are multi-drug resistant organisms that have emerged as important nosocomial pathogens in recent years. Patients with burn injury are highly vulnerable to VRE infection. We evaluated the colonization and infection rate of VRE among severe burn patients. Materials and Methods : We retrospectively reviewed VRE isolation in a tertiary hospital burn center from January 2000 to December 2003. We analyzed and compared the clinical characteristics of VRE colonized (isolated in rectal swab) and infected patients. We also analyzed the risk factors of mortality in VRE infection group by using univariate and multivariate analyses. Results : VRE was isolated from 104 of severe burn patients. Mean percent of total body surface area of 104 patients was 45.43±22.15%. The most commonly isolated VRE was Enterococcus faecium (82.6%). The VRE infection rate of VRE colonization group was 19/93 (20.4%). There were no differences in clinical characteristics, underlying conditions, and isolates species between VRE colonization and infection groups. The mortality rate of VRE infection group was 40%. The risk factors for mortality were bacteremia (P=0.001) and mechanical ventilation (P=0.024) in univariate analysis. However, independent risk factor for death was only VRE bacteremia [odd ratio=32.803, 95% confidence interval (2.884, 373.129), P=0.005] in multivariate analysis. Conclusion : Significant portion of severe burn patients with VRE colonization could progress to VRE infection. Severe burn patients with VRE bacteremia have higher risk of death than patients without VRE bacteremia.