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Trypsin and chymotrypsin development in the neonatal lamb
Journal of Animal Science
|February 1, 1981
Summary
Neonatal lamb duodenal enzyme activity shows significant increases in trypsin and chymotrypsin between days 7 and 14 postpartum. These digestive enzyme levels stabilize thereafter, indicating a critical developmental window for gastrointestinal function.
Area of Science:
- Veterinary Medicine
- Developmental Biology
- Gastroenterology
Background:
- Neonatal digestive enzyme development is crucial for nutrient absorption and overall health.
- Understanding the ontogeny of pancreatic proteases like trypsin and chymotrypsin in lambs is essential for neonatal care and nutrition.
Purpose of the Study:
- To investigate the developmental patterns of trypsin and chymotrypsin activity in the duodenum of neonatal lambs.
- To determine the specific time points during early postnatal life when these key digestive enzymes mature.
Main Methods:
- Twenty-two neonatal lambs were studied at various ages from birth to 42 days postpartum.
- Duodenal tissue samples were collected and analyzed for trypsin and chymotrypsin enzymatic activity.
Main Results:
- Trypsin activity was undetectable at birth, increasing significantly (P < .01) fourfold between days 7 and 14 postpartum.
- Chymotrypsin was present from birth, showing a significant twofold increase (P < .05) in activity between days 7 and 14 postpartum.
- Both enzyme activities remained relatively stable from day 14 through day 42.
Conclusions:
- A critical developmental period for the maturation of trypsin and chymotrypsin activity occurs between the first and second weeks of postnatal life in lambs.
- These findings highlight the rapid development of the lamb's digestive system shortly after birth, impacting nutritional strategies.