Cleft palate development in hamster embryos following triamcinolone treatment

Area of Science:

• Developmental biology
• Teratology
• Oral and maxillofacial surgery

Background:

• Palatogenesis, the development of the palate, is a critical process in embryonic development.
• Glucocorticoids like triamcinolone are known to affect embryonic development and can act as teratogens.
• Understanding the precise timing and mechanisms of teratogenic effects is crucial for preventing birth defects.

Purpose of the Study:

• To investigate the effects of triamcinolone on palatal shelf reorientation during hamster embryogenesis.
• To compare the teratogenic potency of triamcinolone with hydrocortisone during palatogenesis.
• To identify reliable predictors of normal and abnormal palatogenesis in the presence of teratogenic agents.

Main Methods:

• Hamster fetuses were treated with triamcinolone during critical developmental stages.
• Palatogenesis was assessed by examining the reorientation of palatal shelves.
• Fetal growth parameters, including crown-rump length and body weight, were measured.

Main Results:

• Normal palatogenesis in hamsters is completed between days 12 and 13 of gestation.
• Triamcinolone treatment delayed palatal shelf reorientation prior to significant general fetal growth retardation.
• Triamcinolone demonstrated a more potent teratogenic effect on palatogenesis compared to hydrocortisone.

Conclusions:

• Triamcinolone is a potent teratogen that specifically interferes with early palatogenesis.
• Chronological age, fetal weight, and crown-rump length are reliable indicators of normal palatogenesis.
• General fetal growth measures and numerical ratings are not effective predictors of triamcinolone-induced cleft palate.