In utero betamethasone affects 3β-hydroxysteroid dehydrogenase and inhibin-α immunoexpression during testis...

Area of Science:

• Reproductive biology
• Endocrinology
• Developmental toxicology

Background:

• Prenatal exposure to glucocorticoids is a common intervention for preterm birth risk.
• These exposures can lead to adverse health outcomes in offspring later in life.
• Male reproductive function is sensitive to early developmental events in the testes.

Purpose of the Study:

• To investigate the impact of prenatal betamethasone exposure on testicular development.
• To examine the effects on intra-testicular factors: 3β-hydroxysteroid dehydrogenase (3β-HSD) and inhibin-α.
• To assess these effects from fetal development through postnatal life.

Main Methods:

• Pregnant sheep were administered betamethasone or saline during gestation.
• Testicular tissues were collected from fetuses and postnatal lambs at various developmental stages.
• Immunohistochemistry was used to quantify the expression of 3β-HSD and inhibin-α.

Main Results:

• Prenatal betamethasone exposure altered the expression of 3β-HSD and inhibin-α in developing testes.
• While 3β-HSD staining intensity increased postnatally in treated offspring, its area decreased.
• Inhibin-α expression initially declined but recovered by the onset of spermatogenesis.

Conclusions:

• Prenatal betamethasone exposure has lasting effects on testicular development and gene expression.
• These changes may compromise androgen production and spermatogenesis in adult males.
• Further research is needed to understand the long-term reproductive consequences.