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Contact-associated interactions between large and small bovine luteal cells during the estrous cycle
R P Del Vecchio1, J K Thibodeaux, W Hansel
1Department of Animal Science, Louisiana State University, Baton Rouge 70803, USA.
Domestic Animal Endocrinology
|January 1, 1995
Summary
Cell-to-cell contact enhances progesterone secretion in bovine luteal cells. Luteinizing hormone significantly increased progesterone production, while oxytocin and arachidonic acid had no significant effect.
Area of Science:
- Reproductive Biology
- Endocrinology
- Cell Biology
Background:
- Bovine luteal cells play a crucial role in progesterone production during the estrous cycle.
- Understanding factors influencing luteal cell function is vital for reproductive success in cattle.
Purpose of the Study:
- To investigate the impact of cell-to-cell contact and specific signaling molecules on bovine luteal cell function.
- To determine the effects of arachidonic acid (AA), oxytocin, and luteinizing hormone (LH) on progesterone secretion.
Main Methods:
- Corpora lutea from mid- and late-luteal stage Holstein cows were collected.
- Small and large luteal cells were isolated and incubated with or without cell-to-cell contact.
- Cells were treated with AA, oxytocin, LH, or a control for 240 hours, with media changes every 48 hours.
Main Results:
- Progesterone secretion decreased over incubation time irrespective of treatment or cell arrangement.
- Cell-to-cell contact significantly increased progesterone secretion in both mid- and late-luteal stage cells.
- LH treatment resulted in significantly higher progesterone secretion compared to oxytocin, AA, or control treatments.
Conclusions:
- Cell-to-cell contact is important for maintaining progesterone secretion by bovine luteal cells.
- Luteinizing hormone is a potent stimulator of progesterone production in these cells.
- Oxytocin and arachidonic acid do not significantly influence progesterone secretion under these experimental conditions.