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OKT9 ScFv-Diphtheria Toxin 융합 면역독소의 인간 뇌종양 세포주에 대한 세포독성
백운기,송영진,이희우,박나희,김윤청,서수영,김기욱 대한신경외과학회 2004 Journal of Korean neurosurgical society Vol.36 No.1
Objective : Immunotoxin therapy is a novel approach for the treatment of tumor, and it has been successfully used in the central nervous system. The purpose of this study is to evaluate the cytotoxicity of OKT9 ScFv-Diphtheria toxin fusion immunotoxin on various human brain tumor cell lines. Methods : Immunotoxin which was composed of OKT9 ScFv and Diphtheria toxin was made. Its cytotoxicity on glioblastoma cell lines(U87MG, U118MG) and medulloblastoma cell line(TE671) was tested and compared with anti-cancer chemotherapeutic agents. And we also examined the relationship between its cytotoxicity and transferrin receptor expression. Results : It showed most cytotoxicity on U87MG cell line and nearly no effect on U118MG cell line, moderate cytotoxicity on TE671 cell line in sixteen hours exposure experiment. In continuous exposure experiment, it showed moderate cytotoxicity on U118MG cell line, but showed strong cytotoxicity on other cell lines comparable or higher than anti-cancer chemotherapeutic agents. The relationship between its cytotoxicity and transferrin receptor expression was tested using flow cytometry, but no direct relationship could be found. Conclusion : Collectively, the result shows the cytotoxic effects of OKT9 ScFv-Diphtheria toxin fusion immunotoxin against various human brain tumor cell lines in continuous exposure experiment. Therefore, we suggest that this immunotoxin could be developed as a potential immunotherapeutic agent in the treatment of various human brain tumor clinically.
혈관성 발기부전 진단을 위한 경구용 발기부전 치료제 투여 후 3 Dimension HMD (Head Mounted Displayer) 시청각 성자극 검사의 유용성
백운기,문기학 대한비뇨의학회 2005 Investigative and Clinical Urology Vol.46 No.12
Purpose: The AVSS with 3-D HMD is considered to provide a more realistic image and more comfortable circumstances in which the subjects are absorbed in the stimulation. We investigated the efficacy of using 3-D combined with oral medication and a stimulation(COS) test for the evaluation of vasculogenic erectile dysfunction(ED). Materials and Methods: 66 patients with complaints of ED, 28 patients diagnosed with vasculogenic ED and 38 patients diagnosed with psychogenic ED were included in this study. The patients were randomly divided into the 2-D group and the 3-D group. The 2-D group patients were examined with using 2-D combined an injection and a stimulation (CIS) test. The 3-D group patients were examined with 3-D CIS test. Then a week later, the patients underwent the AVSS with 3-D HMD 1 hour after oral PDE 5 inhibitor medication. The degree of erection was monitored using the Nocturnal Electrobioimpedance Volumetric Assessment (NEVA) system. Results: On the 2-D CIS tests, 12 of 27 patients showed normal erection, and this resulted in a sensitivity and specificity of 72.7% and 56.3%, respectively. On the 3-D CIS tests, 20 of 39 patients showed normal erection and on the 3-D COS tests, 17 patients showed normal erection and this resulted in a sensitivity and specificity of 88.2% and 81.8%, and 94.1% and 72.7%, respectively. No significant difference were present in the results of the diagnosis between the 3-D CIS and 3-D COS tests. Conclusions: Both the 3-D CIS and 3-D COS tests offer the advantage of higher sensitivity and specificity than the conventional CIS test. The 3-D COS test may be used as a substitute for the conventional CIS test due to its simplicity and less invasive nature
백운기,정석영,최우석,송필현,조철규,문기학,김동석 영남대학교 의과대학 2003 Yeungnam University Journal of Medicine Vol.20 No.1
Testicular teratoma is characterized that has more than one germ cell layer in various stages of maturation and differentiation. The incidence of mature teratoma varies from 2 to 9% of all germinal testicular tumor. Only 3 cases of bilateral teratoma have been reported in the literature to date. The teratoma can occurs at all ages but is most common between the age of 15-35 year. It is relatively infrequently seen in childhood and infancy. In these age group, teratoma tends to be a benign. Recently, we experienced one case of bilateral testicular teratoma in 4 month-old infancy. We report a case of bilateral testicular teratoma found infancy with review of related literatures.
재난보도준칙 특성 및 규제에 대한 인식이 정책순응과 업무수행 행태에 미치는 영향
백운기 한국정부학회 2015 한국정부학회 학술발표논문집 Vol.2015 No.06
본 논문은 왜 한국 언론은 재난보도를 제대로 하지 못할까? 라는 단순한 의문에서 출발하였다. 재난보도준칙이라는 상당히 구체적인 기본 수칙이 있음에도 불구하고 한국 언론은 재난이 일어날 때마다 보도에 문제점을 드러냈다. 이는 재난보도준칙이 실제 현장에서 제대로 기능하지 못하고 있음을 보여주는 것이라 할 수 있다. 따라서 언론종사자들은 재난보도준칙을 어떻게 생각하는지, 재난보도준칙을 준수할 의지는 얼마나 가지고 있는지, 나아가 재난보도준칙이라는 규제에 대한 순응이 업무수행 행태에는 어떤 영향을 미치는가 알아보고자 했다. 이를 위해 먼저 재난보도준칙이 갖고 있는 특성들을 분석한 후 언론 종사자들은 이러한 특성을 어떻게 이해하고 받아들이는지를 실증적으로 고찰했다. 선행연구를 통해 재난보도준칙의 특성을 정확성, 논리·전문성, 표현성으로 분류하였고 검증을 위해 한국의 재난주관방송사인 KBS의 기자들을 대상으로 재난보도준칙에 대한 의견을 묻는 설문조사를 실시하였다. 설문조사결과는 타당도와 신뢰도 검증을 거쳐 가설 검증에 사용하였다. 정책순응과 업무수행 행태에 영향을 미치는 요인을 살펴보기 위해 경로모형 분석을 실시하였으며 집단 간 차이도 분석하였다. 설문조사 결과 KBS 기자들은 재난보도준칙을 중요하게 여기며 가급적 이를 준수하려는 자세를 갖고 있음을 알 수 있었다. 그러나 준칙에 대한 순응은 연령과 직급, 근무경력, 최종학력 그리고 근무부서에 따라 약간씩의 차이를 나타냈다. 대체로 연령과 직급 근무경력이 오래될수록 준칙에 더 순응적인 태도를 보였다. 본 연구를 통하여 언론종사자들이 재난보도준칙을 숙지하고 이를 준수하려는 노력을 기울여야 하며, 언론기관에서는 이를 위한 교육과 훈련을 게을리 하지 말아야 한다. 재난을 보도한 언론이 재난을 당하는 일은 이제 더 이상 일어나지 말아야 한다.