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Obstet Gynecol Sci > Volume 53(4); 2010 > Article
Korean Journal of Obstetrics & Gynecology 2010;53(4):346-353.
DOI: https://doi.org/10.5468/kjog.2010.53.4.346    Published online April 1, 2010.
Expression of aromatase in endometiosis and its relation to clinical laboratory and surgical parameters.
Il Han Lee, Dong Ho Kim, Ji Hyun Noh, Jae Whoan Koh, Yong Bong Kim
1Mire-I OB & GY Women's Clinic, Seoul, Korea.
2Department of Obstetrics and Gynecology, Chung-Ang University Hospital, Seoul, Korea.
3Department of Obstetrics and Gynecology, Paik Hospital, Inje University College of Medicine, Seoul, Korea. kimyb2@unitel.co.kr
Aromatase is the key enzyme for the conversion of C19 steroids into estrogen in certain human tissues. We studied to evaluate the aromatase expression in eutopic endometirum and endometriotic lesion and its relationship to clinical and laboratory parameters. METHODS: The study included 78 cases of endometriotic lesion and 14 cases of eutopic endometrium and 30 cases of normal uterine endometrium obtained through laparoscopic surgery and curettage. The frozen tissue specimens were examined by immunohistochemistry using aromatase. Clinical symptoms, laboratory findings, and operative findings were analyzed and compared in according to aromatase expression. RESULTS: We observed positive immunohistochemical expression for aromatase in endometriotic lesion from 46/78 patients (59.0%). Aromatase expression was elevated in comparison to eutopic endometrium (5/14 patients, P=0.032) and the difference was more pronounced when eutopic endometriums from patients with endometriosis were compared with those of healthy controls (2/30 patients, P<0.001). Aromatase-positive patients had more moderate-to-severe chronic pelvic pain, higher CA-125 level significantly. Also in operative findings, severe grade endometriosis, bilateral endometriomas, and associated leiomyoma and adenomyosis were more frequent in aromatase positive patients. High values of white blood cell count, erythrocyte sedimentation rate, CA 19-9 were more frequent in aromatase positive patients notwithstanding insignificant differences. CONCLUSION: Unopposed local biosynthesis of estrogens by increased expression of aromatase in eutopic endometrium and endometrial tissue could be involved in the development or maintenance of endometriosis and other uterine estrogen-triggered diseases. Our findings suggest increased expression of aromatase may be related with severity, activity, and chronic pelvic pain in patients with endometriosis.
Key Words: Aromatase, Endometrioma, Tumor markers, Endometriosis

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