Absorption of Macromolecules by Neonatal Intestine

Ingestion of horseradish peroxidase by the intestinal cells in larvae or juveniles of some teleosts.

“…[38][39][40][41][42][43][44][45][46] Although this phenomenon is important to take antibodies from aminiotic fluid or colostrum, SCHECHTMAN47) suggested that it also functions as a specific way for nourishment. HILL48) found that newborns receiving antibodies from colostrum do not digest proteins in their stomach.…”

Newborn calf intestinal absorption of immunoglobulins extracted from colostrum

“…Among other products studied, only poly-L-arginine had a beneficial effect (Smith, Witty and Brown, 1968). All the others such as duodenal fluid (James and Polan, 1978), histamine (Patt et al, 1972), cow saliva (Balbierz et al, 1976), L-methionine and L-leucine (Smith and Pierce, 1967), large quantities of glucose (Lecce, 1966) (Baintner, 1973a, b ;Chamberlain, Perry and Jones, 1965 ;Jensen and Pedersen, 1982 Mancini, Carbonata and Heremans (1965) and the level of alkaline phosphatase according to Bessey, Lowry and Brock (1946) using Boehringer-Mannheim (R) reagents. Cortisol was titrated in groups A and B according to Bosc and Fèvre.…”

Macromolecular Absorption

“…The proteins then traverse the cell either to be deposited in the intercellular space by a reverse endocytosis (exocytosis) or to combine with lysosomes for intracellular digestion (6,12) Uptake specificity and the period of enhanced absorption vary with the species (14,16,21,27), and certain factors in the diet (22) as well as exogenous hormones (15) can cause a premature closure of the epithelial barrier to macromolecules.…”