English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The granulosa cell secretes a protein (follicle regulatory protein: FRP) that affects the responsiveness of other follicles to gonadotropin stimulation. This protein was purified, partially characterized, and rabbit antisera as well as monoclonal antibodies were prepared against FRP. Fixed sections of porcine ovaries were prepared on slides and then incubated with the monoclonal antibody or polyclonal antisera and then incubated with either biotinylated mouse IgM or rabbit IgG antisera, respectively. These sections were then incubated with avidin conjugated to horseradish peroxidase, followed by substrate. Staining with both the monoclonal antibody and the antisera was present in the cytoplasm of granulosa cells of small- or medium-sized antral follicles. Staining distribution was localized preferentially to cells near the basal lamina; the antral granulosa cells of viable follicles did not stain. Neither primordial follicles nor pre-antral follicles (less than 300 microns in diameter) showed any positive staining. Thecal cells were not stained in follicles less than 5 mm in diameter, whereas some large follicles (greater than 5 mm) contained staining in the theca. In the latter, specific granulosa staining was only weakly positive with the polyclonal antibody and negative with the monoclonal antibody. Atretic follicles contained significant staining of all epithelial cells adjacent to the basal lamina by both the monoclonal and polyclonal antibody preparations. Staining of the luteal ovary by the monoclonal antibody was limited to the large luteal cells. These findings suggest that FRP is produced by the granulosa cells of porcine follicles at the stage of maturation corresponding to 0.5 mm in diameter. As the viable follicle increases in size, production of FRP in the granulosa is reduced below the detectable level when the follicle exceeds 5 mm in diameter. The main source of FRP during the luteal phase is the large cell of the corpus luteum.

Localization of follicle regulatory protein in the porcine ovary.