난소 종양에서 Osteopontin의 발현
Osteopontin expression on benign and malignant ovarian tumors
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목적 : 난소 종양의 여러 조직학적 형태에 있어 osteopontin의 발현 양상을 알아보고자 하였다.연구 방법 : 80예의 상피성 난소 종양과 10예의 정상 난소조직에 대한 면역화학조직염색을 시행하였으며, 12예의 신선한 난소 종양, 2예의 정상 난소, 그리고 SKOV3 세포주에 대한 osteopontin mRNA 반정량분석을 시행하였다. SAS 8.2를 통계처리에 이용했고, Fisher's Extract test와 Cochran-Mantel-Haenszel Statistics를 osteopontin의 발현과 조직학적 형태의 관계분석에 이용했다.결과 : 55예의 악성종양중 50% 이상에서 osteopontin이 발현된 예는 투명세포형 14예/14예, 자궁내막양 11예/12예, 장액성 11예/16예, 그리고 점액성 5예/15예에서 발현되었다. 발현정도는 암의 조직학적 형태와 유의하게 관련있었다 (p=0.002). 25예의 양성 종양중 10% 이상이 발현된 예는 장액성 11예/15예, 점액성 3예/10예에서 관찰되었다 (p=0.008). Osteopontin 발현정도는 종양의 등급이나 암기와 관련없었다. Osteopontin mRNA의 반정량분석에서 SKOV3 세포주와 장액성 선암에서 정상 난소에 비해 5-6배 더 높은 수치가 나왔다. 양성 및 악성 점액성 종양에서는 osteopontin mRNA 증가가 없었다.
Abstract
Objective : To understand the expression pattern of osteopontin on various histologic types of ovarian tumors. Methods : We performed an immunohistochemical study on 90 paraffin embedded tissues including 80 ovarian epithelial tumors and 10 normal ovaries. We also performed a semiquantitative study of osteopontin mRNA on 12 fresh ovarian tumors, 2 normal ovaries and SKOV3 cell line. SAS 8.2 program was used for statistical analysis and Fisher's Extract test and Cochran-Mantel-Haenszel Statistics for analysis of the relationship between expression of osteopontin and histologic types. Results : Among 55 carcinomas, over 50% of tumor cells expressed osteopontin in 14/14 clear cell, 11/ 12 endometrioid, 11/16 serous, and 5/15 mucinous types. The expression degrees were well correlated with the histologic types of carcinomas (p=0.002). Among 25 benign tumors, over 10% of tumor cells showed in 11/15 serous and 3/10 mucinous types (p=0.008). However, the degree of osteopontin expression was not related to the tumor grades or stages of ovarian cancer. Semiquantitative study for osteopontin mRNA showed 5-6 times higher in SKOV3 cell line as well as in serous adenocarcinomas, compared with the normal ovaries. However, there was no increase of osteopontin mRNA in benign or malignant mucinous tumors. Conclusion : Our findings suggest that the expression of osteopontin is not only present in ovarian cancers, but also in benign ovarian tumors.
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