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Regular Article |
, Prostaglandin E2, and Prostaglandin F2
a Departments of Obstetrics and Gynecology and
b Pathology, Mie University School of Medicine, Tsu, Mie 514-8507, Japan
ABSTRACT
Tenascin-C (TN-C), an extracellular matrix glycoprotein, is known to be expressed in uterine stroma in the peri-implantation period. Examination of the spatiotemporal pattern during early pregnancy using immunohistochemistry and in situ hybridization revealed TN-C expression in the stroma beneath the luminal epithelia of the murine endometrium on Days 0 and 1 of pregnancy, subsequent disappearance, and reappearance on Day 4. After decidualization, tissue around the deciduoma was positive. In situ hybridization demonstrated TN-C production by the stromal cells adjacent to the epithelia. To investigate the regulation of TN-C expression in vitro, murine uterine stromal and epithelial cells were isolated and cultured. Addition of interleukin-1
(IL-1
) and prostaglandin E2 (PGE2) and F2
(PGF2
) induced TN-C expression in the stromal cells at both protein and mRNA levels, while the sex steroid hormones, progesterone and ß-estradiol, exerted little effect. Immunohistochemistry using anti-IL-1
antibody showed epithelial cells to be positive on Days 24 of pregnancy, and addition of progesterone but not ß-estradiol enhanced IL-1
expression in epithelial cells in vitro. In a culture insert system, TN-C expression by stromal cells cocultured with epithelial cells was induced by addition of progesterone alone that was blocked by additions of anti-IL-1
antibody. Collectively, these findings indicate that TN-C expression in the preimplantation period is under the control of progesterone, but not directly, possibly by the paracrine and autocrine intervention of IL-1
secreted by epithelial cells and PGE2 and PGF2
secreted by stromal cells.
First decision: 30 March 2000.
1 Correspondence: Toshimichi Yoshida, Department of Pathology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan. FAX: 81 59 231 5210; t-yosida{at}doc.medic.mie-u.ac.jp
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