사람 말초혈액 림프구에서 FudR에 의해 유도되는 Fragile Sites

박경란,신웅기,박성국,김원식 충남대학교 의과대학 지역사회의학연구소 1996 충남의대잡지 Vol.23 No.1

Chromosomal abnormalities including fragile sites induced by 10 ㎍/ml and 20 ㎍/ml fluorodeoxyuridine (FudR) were studied in lymphocytes cultures of six healthy individuals. A significant decrease in mitotic indexes in respect to control cultures was observed with two FudR concentrations used. The cells showing chromosome aberrations and the total number of cytogenetic alterations were significantly increased both FudR treated cultures with respect to control cultures. Damaged cells showing chromosome aberrations and total number of chromosomal aberrations were not significantly increased in FudR 20 ㎍/ml treated groups compared to FudR lO㎍/ml treated groups. The most frequent type of chromosomal aberration is a gap. A site showing a gap or break was defind as fragile if it appeated in 1% of cells analyzed and in at least three of six individuals studied with the same culture tre atment. Using these criteria, fragile sites 3p14, 6p25, 3q32, 1Oq22, 12q21 and 13q21 were induced in different proportions by different concentration of FudR.

Methotrexate가 脾臟에 미치는 影響에 관한 硏究

朴景蘭,李永浩,金源式 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.1

In order to study the morphological changes of spleen after treatment with methotrexate, ICR mice were used as experimental animal. The experimental mice were divided into control, 50mg/kg and 500mg/kg of methotrexate treated groups. Methotrexate injected intravenously via tail vein once on the 8th day of pregancy. The mice were sacrificed on the 1st, 2nd 3rd and 4th day after treatment, the spleens were removed and fixed in 10% neutral buffered formalin solution for 48hrs. Spleens were cutted 5㎛ thick and stained with H-E, then observed under the light microscope. The results were as follows: 1. The size of spleen were reduced after MTX treatment more on dose day by day. 2. The periarterial lymphatic sheath (PALS) and germinal center were also reduced after MTX treatment. 3. The lymphocytes of white pulp showed nuclear pyknotic changes and many nuclear debris were found after MTX treatment. 4. The brown hemosiderin pigments were increased markedly in the red pulp of MTX treated groups. 5. Marked proliferation of fibrous trabeculae were found in the red pulp of MTX treated mice.

간질환환자의 말초임파구 염색체에서 Fragile Site의 의의

박경란,김수일,이영호,김원식 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.1

To understand chromosomal instability in hepatitis B virus related disease and significance of fragile sites in hepatoma, lymphocytes of peripheral blood from patients of hepatitis, liver cirrhosis and hepatoma were cultured. Fragile sites of chromosomes were counted by chromosome group and the results were as follows. 1. The frequencies of fragile sites were significantly increased in hepatitis, liver cirrhosis and hepatoma compared with control group. 2. The frequency of fragile sites by chromosome group were appeared in chromosome C, A, B and E group in turn on control group, chromosome C, A and B in turn on hepatitis and liver cirrhosis, and chromosome C, B and A in turn on hepatoma respectively. 3. The frequency of fragile sites was significantly increased in liver cirrhosis with HBsAg( + ) in comparison to HBsAg(-) liver cirrhosis. However no differences of frequency were founded in hepatoma by presence of HBsAg. 4. The common specific fragile sites of chromosome were appeared in chromosome 2q13, 5q34, 6p22 and 11q13, It is presumed that chromosomal instability by hepatitis B virus may induce hepatocellular carcinoma, and the common fragile sites found in chromosome 2q13, 5q34, 6p22 and 11q13 would be correlated with sites of oncogenes. However, more study needs to he done in correlation between fragile sites and oncogenes.

사람 말초혈액 림프구에서 Bromodeoxyuridine에 의해 유도되는 Fraglie Sites

박경란,김원식 충남대학교 의과대학 지역사회의학연구소 1995 충남의대잡지 Vol.22 No.2

Chromosomal abnormalities including fragile sites induced by 50㎍/ml and 100㎍/ml bromodeoxyuridine (BrdU) was studied in lymphocytes cultures of six healthy individuals. A significant decrease in mitotic indexes in respect to control cultures was observed with both BrdU concentrations used. The cells showing chromosome aberrations and the total number of cytogenic alterations were significantly increased both BrdU treated cultures with respect to control cultures. Damaged cells showing chromosome aberrations and total number of chromosomal aberrations were increased in BrdU, 100㎍/ml treated groups compared to BrdU 50㎍/ml treated groups. The most frequent type of chromosomal aberration is a gap. A site showing a gap or break was defind as fragile if it appeared in 1% of cells analyzed and in at least three of six individuals studied with the same culture treatment. Using these criteria, fragile sites 4q31, 5q31, 6p22, 6q13, 9q21, and 15q24 were induced in different proportions by different concentration of BrdU.

정신분열증 환자의 말초임파구에서 Fluorodeoxyuridine에 의해 유도되는 Fragile Sites

박경란,김원식 충남대학교 의과대학 지역사회의학연구소 1996 충남의대잡지 Vol.23 No.2

The expression frequency of FUdR-induced fragile sites was examined in schizo phrenia patients to determine whether this parameter could be used as a marker of genetic susceptibility in at risk individuals. No difference was found in expression frequency between the schizophrenia patients and a group of normal individuals. This indicates that the expression frequency of fluorodeoxyuridine induced fragile sites is not a suitable marker for assessing genetic susecptibility in schizophrenia.

정신 분열증 환자의 말초혈액림프구에서 BrdU에 의해 유도되는 Fragile Sites

박경란 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.2

The expression frequency of BrdU-induced fragile sites was examined in schizophrenia patients to determine whether this parameter could be used as a marker of genetic susceptibility in at-risk individuals. No difference was found in expression frequency between the schizophrenia patients and a group of normal individuals. This indicates that the expression frequency of bromodeoxyuridine induced fragile sites is not a suitable marker for assessing genetic susceptibility in schizophrenia.

제 1형 신경섬유종증 환자에서 발생한 위장관 간질종양 1예

원경준,이준,변유미,조민근,한경택,김원,홍란,임성철,김경종,김영대,박찬국,김만우 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.2

Gastrointestinal stromal tumor (GIST) is the most common non-epithelial neoplasm arising in the gastrointestinal tract, but this tumor is rarely seen in association with type l neurofibromatosis (NFl) Generally, the majority of GISTs are isolated neoplasm and they are sporadically found in the stomach, but the GISTs in NFl patients are usually multiple and usually found in the small intestine. We report a case of multiple GISTs in the jejunum of a 63-year-old woman diagnosed as NFl accompanied by complication of gastrointestinal bleeding, In this case, Patient had multiple cafe-au lait spots and neurofibroma on skin and had freckling on axilla and groin, and then, we made a diagnosis of NFl. Gastrointestinal bleeding is controlled by resection of multiple GISTs. Generally, only 3-5% of all gastrointestinal bleeding comes from the small bowel. Causes of small intestinal bleeding are angiodysplasia, neoplasm, NSAIDs induced ulcer etc. but, If patients have NFl accompanied by complication of gastrointestinal bleeding, GISTs on small bowel must be considered.

교원의 교원능력개발평가 결과, 인구학적 특성과 전문성 인식의 관계

박지혜,이경란,문은주 이화여자대학교 교육과학연구소 2015 교육과학연구 Vol.46 No.4

This study aimed to provide useful information by investigating the relationships between the results of teacher evaluation for professional development, teachers’ demographic characteristics, and their perception of expertise. Among those who participated in the survey asking teachers’ perception of the 2014 teacher evaluation for professional development, the data from 1,622 teachers in the upper and lower limits of one standard deviation of teacher peer evaluation and student satisfaction were used. Study findings were as follows. First, statistically significant and positive correlations existed between teacher evaluation results and teachers’perception of expertise. Second, female teachers, those whose career spanned 5-15 years, elementary teachers perceived their expertise higher than those of male teachers, those whose careers did not span 5-15 years, and middle and high school teachers. Third, mean scores of expertise perception of teachers who had high scores on peer evaluation and student satisfaction were higher than those of other groups. Last, providing information to parents and appropriate evaluation were the key factors distinguishing those who had high scores on teacher evaluation and student satisfaction from those had high scores on teacher evaluation and low scores on student satisfaction. In addition, providing information to parents was the key factor differentiating those who had high scores on teacher evaluation and student satisfaction from those who had low scores on both teacher evaluation and student satisfaction. The significance of these study results was discussed along with limitations and suggestions for future research studies.

국내 5개 3차 병원의 β-lactam계 항생제 사용 실태 및 Klebsiella pneumoniae의 항생제 내성과의 상관 관계

정숙인,박경화,권기태,고관수,오원섭,정두련,백경란,염준섭,장현하,김신우,손준성,송재훈 대한감염학회 2007 감염과 화학요법 Vol.39 No.4

Background : This study was performed to evaluate the prescribing pattern of β-lactam antibiotics and the relationship between antimicrobial resistance and antimicrobial use in 5 tertiary care hospitals in Korea. Materials and Methods : Data on annual patient-days and annual consumption (defined daily dose (DDD) per 100 patient-days) of β-lactam antibiotics from 2003 to 2005 in 5 tertiary hospitals were analyzed. To determine the antimicrobial resistance in K. pneumoniae, broth microdilution test and double disk synergy were performed according to the CLSI performance standards. Spearman's correlation coeffient was used to determine the relationship between antibiotic consumption and resistance. Results : The prescription of β-lactam antibiotics in 5 tertiary hospitals markedly varied. In two hospitals, increase in consumption of β-lactam antibiotics was more than 30% during recent 3 years. The higher consumption of β-lactam antibiotics significantly correlated with the higher rate of antibiotic-resistant K. pneumoniae in 5 tertiary care hospitals. Conclusion : Continuous surveillance of antibiotic use is needed to encourage appropriate prescribing of antibiotics and to reduce antibiotic resistance. 목적 : 항생제의 오남용으로 인한 내성균의 발현 및 급속한 확산이 전세계적으로 문제시 되고 있다. 특히 병원은 항생제 내성의 중심점에 있는 것으로 여겨진다. 본 연구에서는 최근 3년간 국내 5개 3차 병원의 β-lactam계 항생제의 사용량을 조사하고, 각 병원별 항생제 사용량과 K. pneumoniae의 항생제 내성률과의 상관관계를 알아보고자 하였다. 재료 및 방법 : 국내 5개 3차 병원에서 2003년 1월부터 2005년 12월까지 병원 입원 환자를 대상으로 연도별 재원연인원수와 각 β-lactam계 항생제의 총사용량을 수집하여 DDD (defined daily dose) per 100 patient-days로 환산하여 비교하였다. 2005년 6월부터 8월까지 각 병원의 임상검체에서 동정된 K. pneumoniae를 수집하여 액체배지미량희석법으로 항생제 감수성 검사를 시행하였고 ESBL(extended-spectrum β-lactamase) 생성 여부는 double disk synergy test를 시행하였다. 항생제 사용량과 내성의 상관관계는 Spearman 상관관계 분석을 시행하였다. 결과 : 5개 병원 중 3개 병원에서는 연도별 β-lactam계 항생제 사용량이 비슷하게 유지되었으나, 2개 병원에서는 2003년에 비해 2005년에 항생제 사용량이 30% 이상 증가하였다. β-lactam계 항생제 중 제제별 비율은 각 병원마다 차이가 있었으나, 3세대 cephaosporin의 사용이 가장 많았고 2세대 ceaphlosporin, β-lactam/β-lactamase inhibitor, 1세대 cephalosporin 순이었다. 경구용 β-1actam계 항생제의 사용량(r=0.900, P<0.037)과 2세대 cephalosporin의 사용량(r=0.900, P<0.037)은 각각 K. pneumoniae의 ESBL 생성과 양의 상관관계가 있었다. Ceftazidime의 사용량은 K. pneumoniae의 ceftazidime 내성률과 양의 상관관계가 있었다(r=0.900, P<0.037). 반면 imipenem의 사용량은 piperacillin/tazobactam 내성과 음의 상관관계가 있었다(r=-0.900, P<0.037). 결론 : 최근 3개년간 항생제 사용량은 병원별로 차이가 있으나 일부 병원에서는 증가하였다. β-lactam계 항생제의 사용량은 K. pneumoniae의 항생제 내성과 상관관계가 있었다. 항생제 사용을 줄임으로써 항생제 내성을 감소시킬 수 있을 것으로 기대되며, 병원별로 항생제 사용에 대한 지속적인 감시가 필요할 것이다.

가정에서 제조된 재래식 된장, 간장, 고추장 중에 존재하는 Ochratoxin A의 효소면역분석법에 의한 잔존량 분석

김철재,박경란,송태희 숙명여자대학교 환경과학연구소 1995 환경과학 Vol.2 No.-

본 연구에서는 재래 방법에 따라 생산되고 있는 전통발효식품(된장, 간장, 고추장)에 함유되어 있는 Ochratoxin A(OT-A)를 면역학적 정량분석법인 Enzyme-Linked Immuno-sorbent Assay(ELISA) 법을 개발하여 분석하였다. 각 가정에서 생산하여 소비되는 장류 즉, 된장 13종, 간장 12종, 고추장 14종을 전국적으로 수거하여 분석을 실시하였다. OT-A를 정량 조사한 표준곡선의 작성 결과 ELISA 방법의 sensitivity는 20pg/assay 이었으며, 본 실험에서 사용한 면역분석법의 OT-A 회수율은 90%이상이었다. OT-A의 잔존량은 가정에서 생산하여 소비되는 된장이 7.1±3.7ng/g, 간장이 2.1±2.6ng/g, 그리고 고추장이 4.0±1.9ng/g이었으며, OT-A에 대한 오염도가 비교적 낮은 것으로 나타났다. 한편 OT-A의 가열안정성 시험에서는 60, 90, 120℃에서 120분까지 가열 처리하여 OT-A의 잔존량을 조사하였던 바 121℃의 고온에서 120분까지도 안정하였다. This study was undertaken to develop the analytical procedures, Enzyme-Linked Immunosorbent Assay(ELISA) for the quantitative detection of ochratoxin A(OT-A) in the home-made 13 Doenjang, 12 Kanjang, and 14 Gochujang collected throughout the country. The detection limit in ELISA was leveled as low as 20 pg/assay, and that the OT-A recorvery rates from sample clean-up were appeared to be more than 90%. Therefore, ELISA was the appropriate tool to detect the residual OT-A in the traditional fermented foods. The residual contents of OT-A in the home-made traditional fermented foods were 7.1 《3.7 ng/g for Deonjang, 2.1《2.6ng/g for Kanjang, and 4.0《1.9ng/g for Gochujang. Comparatively it was low,and OT-A seemed to be carried over Doenjang to Kanjang from Meju. At heating stability test of OT-A in the traditional fermented foods was it found to be stable even at 121℃ for 120 min.