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Changes in the Temporal and Spatial Expression of H�58 During Formation and Maturation of the Chorioallantoic Placenta in the Rat 1

By Virginia Rider, Stephanie R. Jones, Raymond T. Foster and Kazuhiko Imakawa


Cloning and sequencing of a cDNA amplified by RNA fingerprinting at the implantation site of pregnant rats revealed 80 % similarity with H�58, previously shown to be essential for formation of the chorioallantoic placenta in the mouse. H�58 mRNA was detected in the endometrium of hormonally sensitized rats stimulated to undergo decidualization and in the contralateral uterine horns lacking a decidual stimulus, indicating that uterine expression of H�58 mRNA did not require decidualization or the presence of a blastocyst. Immunodetection in the early postimplantation uterus (Days 6–8 of pregnancy) showed H�58 localized in the luminal and glandular epithelia and some stromal cells. Decidual cells at Day 6 of pregnancy expressed H�58, and by Day 9 of pregnancy, the protein localized throughout the maternal decidua. The temporal and spatia

Year: 2008
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