Expression of inhibin/activin subunits in the equine uteri during the early pregnancy.

This research investigates the differing patterns of inhibin/activin subunits in horse uteri during early pregnancy. It was found that these desirable endocrine factors and nutriments have various expression patterns that likely play essential roles in initial equine embryonic development.

Research Method

• The researchers obtained uteri from four adult horses on either cyclic day 13 or pregnancy day 25.
• They utilized techniques such as immunohistochemical experiments to study the expression pattern of inhibin/activin subunits during early pregnancy.

Findings

• The experiments revealed the inhibin/activin subunits were found in the luminal and glandular epithelium on pregnancy day 25.
• On cyclic day 13, they noted the absence of the inhibin α and inhibin/activin βB subunits. However, the inhibin/activin βA subunit was present in the luminal and glandular epithelium.

Further Analysis

• Additional investigation, incorporating real-time polymerase chain reaction and Western blotting, indicate a significant increase in the expression of inhibin/activin subunit βB but reduction in the expression of inhibin/activin subunit βA on pregnancy day 25 compared to cyclic day 13.
• An enzyme-linked immunosorbent assay suggested a significant decrease in activin A concentration in endometrium extracts from cyclic day 13 to pregnancy day 25.

Conclusion

• The results show varying expression patterns of inhibin/activin subunits in the uterus during early horse pregnancy.
• The research infers that inhibins or activins, given their roles as endocrine factors and nutriments, might play different, critical roles during the early stages of equine embryonic development.