The American Journal of Surgical Pathology. 25(5):667-672, MAY 2001
PMID: 11342781
Issn Print: 0147-5185
Publication Date: May 2001
Absence of Estrogen Receptor-α Expression in Human Ovarian Clear Cell Adenocarcinoma Compared With Ovarian Serous, Endometrioid, and Mucinous Adenocarcinoma
Masaki Fujimura;Takao Hidaka;Ken Kataoka;Yoshihiro Yamakawa;Shinobu Akada;Akiko Teranishi;Shigeru Saito;
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From the Department of Obstetrics and Gynecology (M.F., T.H., K.K., Y.Y., S.S.), Toyama Medical and Pharmaceutical University; the Department of Obstetrics and Gynecology (S.A.), Habikino Prefectural Hospital; and the Department of Obstetrics and Gynecology (A.T.), Nara Medical University, Japan.
Abstract
The mechanism that regulates growth in ovarian clear cell adenocarcinoma (CCA) is not well understood. A high incidence of concurrent endometriosis with CCA may indicate that estrogen is a growth promotor in CCA. To determine estrogen as a growth promotor, the authors investigated the presence or absence of estrogen receptor-α (ER-α), ER-β, progesterone receptor, and dioxin receptor (i.e., aromatic hydrocarbon receptor) in clinically resected ovarian CCA, serous adenocarcinoma (SAC), endometrioid adenocarcinoma (EAC), and mucinous adenocarcinoma (MAC) specimens using an immunohistochemical method. Expression of ER-α and ER-β messenger ribonucleic acid was examined by reverse transcription–polymerase chain reaction in three established CCA cell lines: KK, RMG-1, and HAC-II. None of the surgically resected CCA and CCA cell lines showed positive staining for ER-α. Conversely, 97.2% of SACs, 100% of EACs, and 70% of MACs showed positive nuclear staining for ER-α (p <0.001). Conversely, positive ER-β staining for CCA (39.3%) was similar to that of SAC (41.7%) and MAC (30.0%). EAC (75%) showed a higher expression of ER-β (p <0.02). Progesterone receptor was detected in only 10.7% of CCA, compared with SAC and EAC (SAC, 86.1%; EAC, 91.7%; p <0.01). Aromatic hydrocarbon receptor was detected in all histologic types at an incidence of approximately 50% to 60%. Messenger ribonucleic acid of ER-α and ER-β was not detected in the three CCA cell lines. These findings indicate biologic characteristics that distinguish CCA from other types of ovarian epithelial cancer.
