Relevance of ER to the development of endometrial hyperplasia and adenocarcinoma

Kiyoko Kato, Shinji Horiuchi, Yasuhisa Terao, Yousuke Ueoka, Jun Ichi Nishida, Daisuke Mori, Yasuji Yoshikawa, Norio Wake

研究成果: Contribution to journalReview article査読

4 被引用数 (Scopus)


Estrogen has an important role in both the etiology and treatment of hormone-dependent endometrial cancers, although the mechanism remains elusive. To define the role of estrogen-mediated signaling we investigated the biological significance of estrogen receptors (ER) in NIH3T3 cell transformation via the [ 12Val] K-Ras mutant. This mutant enhanced the steady state level and transcriptional activity of ER. In addition, overexpression of both wild type K-Ras and ER transformed NIH3T3 cells. Co-expression of the progesterone receptor (PR) with mutant K-Ras led to suppression of tumorigenicity and inhibition of ER activation. The antisense oligomers complementary to ER suppressed proliferation and transformed phenotypes of K12V cells. These observations support the importance of ER in Ras-mediated cell transformation. To address whether ER activation is also important in the development of human endometrial cancers, we investigated ER and PR expression levels in premalignant and malignant endometrial lesions. The results suggested the implication of ER abundance in endometrial hyperplasias, though modulation of PR expression by ER was retained. G1 adenocarcinoma also expressed higher levels of ER while PR modulation by ER was abrogated. These data implied the importance of ER activities in endometrial hyperplasia and G1 adenocarcinoma development.

ジャーナルBreast Cancer
出版ステータス出版済み - 10 1999

All Science Journal Classification (ASJC) codes

  • 腫瘍学
  • 放射線学、核医学およびイメージング
  • 薬理学(医学)


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