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대장 종양 발생과정에서 c - erbB - 2 암유전자 , / p53 유전자 , PCNA 에 대한 면역조직화학적 연구
안영주(Young Joo An),지미선(Mi Seon Ji),최성규(Sung Kyu Choi),유종선(Jong Sun Rew),윤종만(Chong Mann Yoon),이민철(Min Cheol Lee) 대한내과학회 1996 대한내과학회지 Vol.50 No.6
Objectives Colon tumors appear to occur as a result of the mutational activation oncogenes coupled with the inactivation of tumor suppressor genes. Cell proliferation is a great importance in gastrointestinal tumorigenesis. Overexpression of c-erbB-2 oncogene and mutated p53 gene have been demonstrated in a number of adenocarcinomas, PCNA has been shown to be available as a single histologic marker of proliferative activity, Methods: To investigate the role of c-erbB-2 oncogene, p53 gene and cell proliferation in colon tumorigenesis, expression of c-erbB-2, p53 and PCNA was evaluated immunohistochemically in paraffinembedded sections of 80 colon carcinomas, 10 adenomas and 10hyperplastic polyps. Results: 1) The positivity for c-erbB-2 oncogene was 77.3% (61 of 80) in carcinoms, 60.0% (6 of 10) in adenomas and 10.0% (1 of 10) in hyperplastic polyps. The difference of reactivity for c-erbB-2 oncogene was statistically significant(p=0,001). 2) p53 expression was detected in 45 of 80(56.3%) cases of colon carcinomas, but all in adenomas and hyperplastic polyps was negative. 3) PCNA index was 12.8±4.9% in hyperplastic polyps, 20.3±8.2% in adenomas and 35.9±19.8% in carcinomas. PCNA index of adenomas and carcinomas was higher than that of hyperplastic polyps (p<0.05, p<0.001). 4) Coexpression of c-erbB-2 oncogene and p53 occurred together in 30 of 80colon carcinomas. Thirty-one carcinomas expressed only c-erbB-2 oncogene, 15expressed only p53 and 4expressed neither. Conclusion: These results suggest that cell proliferation is important in tumorigenesis of the colon and c-erbB-2 oncogene may be associated with early stages of colon tumorigenesis. Expression of p53 may occur as late events in colon tumorigenesis.
내연기관 구동 비상용 브러시리스형 동기발전기의 과도특성 개선
안영주(Young-Joo An) 대한전기학회 2016 전기학회논문지 P Vol.65 No.4
A brush-less type synchronous generator is driven by an internal-combustion engine that is used for emergency source. This kind of generator has to maintain output voltage in a range of some degree under the abrupt load irregular conditions such as a full load trip. This paper suggests a suppression method of increasing the output voltage over the rating. Automatic voltage regulator detects excessive rising of output voltage of the generator and supplies the signals to a switch installed in the rotating exciter through the photo-coupler. The current of main field rapidly decreases by additional resistor of the main filed circuit. Therefore, the output voltage of the generator is maintained effectively. The experimental results verified that the excessive value of the output voltage is limited in the range of 7% of the rated voltage.
단일기관에서 시행한 2,000예 이상의 복강경 담낭 절제술에 대한 임상적 분석
안영주(Young Joo An),김영훈(Young Hoon Kim),정갑중(Ghap Joong Jung),김성흔(Sung Heun Kim),노영훈(Young Hoon Roh) 대한외과학회 2009 Annals of Surgical Treatment and Research(ASRT) Vol.76 No.6
Purpose: Laparoscopic cholecystectomy has become the standard modality of acute and chronic gallbladder disease. This study was performed to evaluate a change in the indication for laparoscopic cholecystectomy according to period by analyzing our experiences. Methods: We retrospectively analyzed 2,096 cases of laparoscopic cholecystectomy that were treated at the Department of Surgery, Dong-A University. They were divided into 3 groups from October 1992 to December 1996 (Group 1), from January 1997 to December 2001 (Group 2) and from January 2002 to March 2007 (Group 3). Results: The mean age was 50.14±13.89 years and the male-to-female ratio was 1:1.23. Previous abdominal surgery was noted in 12.24% from Group 1, 14.96% from Group 2 and 21.48% from Group 3. Chronic cholecystitis was the most common pathologic diagnosis in all cases. However, while the incidence of acute cholecystitis and gallbladder empyema in Group 1 was 3.36% and 0%, that of Group 2 was 12.52% and 3.88% and that of Group 3 was 31.79% and 7.59%, which was increased. The mean operation time of each group was 101.00±51.00, 69.86±40.55, 78.01±45.55 minutes (P<0.05). The conversion rate of each group was nine cases (6.04%), 21 cases (3.02%), and 51 cases (4.07%). The surgical complication rate was 7.38%, 3.88% and 4.71%, respectively. The length of hospital stay was 6.08±3.65, 3.16±2.99 and 2.91±3.34 days, which was significantly decreased (P<0.05). Conclusion: As surgical experience increased and laparoscopic surgical skills developed, the indication for laparoscopic cholecystectomy changed. The results of this study showed that laparoscopic cholecystectomy was feasible for the treatment of complicated gallbladder lesion.