The binding of progesterone in different parts of the rabbit uterus during implantation.
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Date
1980-12
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Abstract
Progesterone receptors, both nuclear and cytosolic, were determined in the embryonic
and inter-embryonic segments of the rabbit uterus at 6, 7 and 8 day post-coitum. At day 6 postcoitum
a higher concentration of nuclear receptor in the embryonic segment was observed
compared with that in the inter-embryonic segment. A reverse situation was observed in the case
of cytoplasmic receptors. On the 7th day post-coitum, no significant alteration in the concentration
of either kind of the receptors was observed. However, on day 8, a higher concentration of
both nuclear and cytosolic receptors at the embryonic site was observed compared to that in
inter-embryonic segment. Since receptors are influenced only in the immediate vicinity of the
blastocyst, it can be suggested that the blastocyst plays a role in the induction of its own
implantation. Further, at day 8 increase in receptor concentration at the embryonic site may be
related to the presence of decidual tissue at this site.
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Keywords
Rabbit, uterus, progesterone, receptors
Citation
Puri Raj K, Roy S K. The binding of progesterone in different parts of the rabbit uterus during implantation. Journal of Biosciences. 1980 Dec; 2(4): 349-354.