AI Article Synopsis
- The study examined how different levels of nutrition affect progesterone receptor (PR) and estrogen receptor alpha (ERalpha) in the endometrium of Rasa Aragonesa ewes.
- Ewes were divided into two groups based on their diet, with one group receiving a higher nutritional level (Group C) and the other a lower level (Group L), and were analyzed on Days 5 and 10 of their estrous cycle.
- Results showed that lower nutrition in Group L ewes led to reduced PR immunostaining on Day 5, highlighting a specific relationship between nutritional intake and receptor expression, while ERalpha levels remained unchanged.
Article Abstract
The effect of plane of nutrition on progesterone receptor (PR) and estrogen receptor alpha (ERalpha) expression in ovine endometrium was investigated. Rasa Aragonesa ewes (n=26) were fed diets to provide either 1.5 (Group C) or 0.5 (Group L) times the daily maintenance requirement and were slaughtered at Days 5 or 10 of the estrous cycle (Day 0=estrus). PR and ERalpha immunoreactivity were analyzed in eight endometrial cell compartments, defined by cell type and location. Group L had less PR immunostaining on Day 5 (P<0.05), which is consistent with lesser endometrial content of progesterone found in such animals. Most cell types of Group C had down regulation of PR at Day 10, but in Group L, this pattern was observed only in three cell compartments. The lesser PR contents found at Day 5 in Group L ewes may explain the lack of inhibition of PR. No effect of treatment or day of the estrous cycle was observed in ERalpha. Results indicate that endometrial PR is affected in a cell type, in specific manner, by plane of nutrition.
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| http://dx.doi.org/10.1016/j.anireprosci.2003.12.011 | DOI Listing |
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