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[Trypsin and chymotrypsin activity during early postnatal development in the rat]
Voprosy Meditsinskoi Khimii
|January 1, 1979
Summary
Pancreatic enzyme activity, including trypsin and chymotrypsin, changes significantly during early rat development. Newborn rats exhibit intensive digestion of milk proteins in the ileum.
Area of Science:
- Biochemistry
- Physiology
- Developmental Biology
Context:
- Pancreatic enzymes, trypsin and chymotrypsin, play crucial roles in protein digestion.
- Understanding their developmental changes is vital for assessing digestive system maturation.
Purpose:
- To investigate the age-related changes in the activity and content of trypsin and chymotrypsin in rat pancreas and small intestine chyme.
- To determine the site and extent of protein digestion during early postnatal development in rats.
Summary:
- Pancreas of newborn rats showed decreased chymotrypsinogen and increased trypsinogen, which normalized by 4-20 days.
- Trypsin and chymotrypsin activities were similar in the duodenum of young and adult rats.
- Pancreatic proteinase activity increased in the jejunum by 30 days and was highest in the ileum, suggesting significant milk protein digestion in newborn rats.
Impact:
- Provides insights into the developmental timeline of pancreatic digestive enzyme function in rats.
- Highlights the ileum as a key site for postnatal protein digestion.
- Contributes to the understanding of neonatal digestive physiology and nutritional adaptation.