[Trypsin-inhibitor activity in colostrum - an overview].

Area of Science:

• Veterinary Immunology
• Neonatal Physiology
• Biochemistry

Background:

• Colostrum is vital for neonatal immunity, providing essential proteins and immunoglobulins.
• These crucial molecules must survive the neonatal gastrointestinal tract's proteolytic enzymes for absorption.
• Trypsin-inhibitor activity in colostrum protects proteins from degradation.

Purpose of the Study:

• To review and summarize the current understanding of trypsin inhibition in colostrum across different mammalian species.
• To highlight the significance and variability of colostric trypsin inhibition.

Main Methods:

• Literature review of scientific articles on colostrum composition and function.
• Comparative analysis of trypsin-inhibitor activity in colostrum from various species (artiodactyls, equines, carnivores).

Main Results:

• Colostrum universally exhibits trypsin-inhibitor activity, a general characteristic, not a single molecule.
• High trypsin inhibition is observed in artiodactyls, decreasing rapidly post-calving.
• Equine and carnivore colostrum show lower and less stable trypsin-inhibitor activity compared to artiodactyls.

Conclusions:

• Trypsin inhibition in colostrum is a key protective mechanism for neonatal protein absorption.
• Significant interspecies variation exists in the level and stability of this activity.
• Further research is needed to fully elucidate the functional importance of trypsin inhibition in different species' neonatal development.