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담석의 병인에 있어서 담낭수축 기능의 의의에 관한 연구
이옥찬(Ock Chan Lee),박경근(Kyung Geun Park),안유헌(Yoo Hern Ahn),임헌길(Heon Kil Rhim),함준수(Joon Soo Hahm),이민호(Min Ho Lee),기춘석(Choon Suhk Kee),박경남(Kyung Nam Park) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.1
N/A Gallstone is the most common disease in the biliary system, and the incidence is increasing gradually. Furthermore, the composition of stones in Korea seems to be changed to approach that of stones formed in the west. Factors responsible for this change may include rapidly pro- ceeding urbanization and changing food habits. The method of medical therapies for gall- stones is also increasing and results in a number of clinical studies for pathogenesis of gall- stones such as stasis, supersaturation, and crystal formation of bile juice. We studied for 40 subjects, healthy controls were 20 (11 male, 9 female: mean age, 44.45 years, mean body mass index, 24.07), and gallstone patients were 20 (1 1 male, 9 female: mean age, 54.7 years, mean body mass index, 22.78). The gallbladder volumes were measured by real time ultrasonography using the ellipsoidal method. And then, we calculated ejection fraction (EF) by these results. The results were expressed as mean + standard deviation, and differ- ence in the mean values of each group were evaluated by the Students t test. Statistical sig- nificance was assigned if P was <0.05. There was no significant difference between gallstone patients and healthy controls in age, body mass index, and biochernical laboratories. Both fasting gallbladder volume and ejection fraction were not different between obese and non obese group. However, ejection fraction in gallstone patients was significantly lower than normal controls in obese group. Ejection frac- tion(EF, %) was significantly greater in controls than gallstone patients. No significant differ- ences were observed in fasting gallbladder volumes between gallstone patients and healthy controls, but gallbladder volume after fatty meal was significantly larger in gallstone patients than control subjects. Fasting gallbladder volumes were significantly reduced after fatty meal in both groups. The gallbladder motility rnay play a role on gallstone formation, and the estimation of its motility may be an important factor in deterrnining the response to medical therapy.(Korean J Gastroenterol 1994; 26: 143 150)
갑상선 종양에서 VEGF(Vascular Endothelial Growth Factor)의 발현과 신생혈관생성
태경(Kyung Tae),이용섭(Yong Seop Lee),박인범(In Beom Park),서인석(In Seok Seo),이형석(Hyung Seok Lee),오영하(Young Ha Oh),박용수(Yong Soo Park),안유헌(Yoo Heon Ahn) 대한두경부종양학회 2004 대한두경부 종양학회지 Vol.20 No.2
Background and Objectives: Angiogenesis is the process of new blood vessel development from preexisting vessel. Angiogenenesis has been considered to be essential for the growth and expansion of a solid tumor. Vascular endothelial growth factor (VEGF), known as one of the most important vascular permeability factors, induces proliferation of endothelial cells, stiumulates angiogenesis, and increases vascular permeability. Several recents reports have documented that VEGF overexpression is associated with poor clinical outcomes in many maligmancies. The aims of this study were to determine whether microvessel density and VEGF expression are related to clinicopathologic factors such as age, sex, tumor size, tumor stage, and prognostic factors and to evaluate the relationship between VEGF expression and angiogenesis in benign and malignant thyroid tumors. Materials and Methods: The subjects were 65 patients (27 with papillary carcinoma, 27 with adenomatous hyperplasia, 11 with follicular adenoma) who underwent thyroidectomy from 1995 to 2001. Imuunohistochemistry was used to detect VEGF expression and microvessel density (MVD) in paraffin-embedded thryoid tumor specimens. Results: The intensity of the VEGF expression did not show stastically difference between benign and malignant thyroid tumors. There was no apparent correlation between VEGF expression and age, tumor size, T stage or scores of the AGES, AMES and MACIS systems. The neo-microvessel density was higher in the maligant tumor than the benign tumors. Also, higher neo-microvessel density was associated with metastases of the lymph nodes and scores of the AMES and AGES systems. Conclusion: Our results suggest that neo-microvessel vessel density may be a significant prognostic factor in the thyroid papillary carcinoma. But the VEGF expression does not appear to be an significant independent prognostic factor for thyroid papillary carcinoma.