Ontogenetic development of proline intestinal transport in the domestic fowl.
1. The proline disappearance from the jejunal and ileal lumen of chickens aged from 1 day to 15 weeks were studied using a perfusion method "in vivo". 2. A decrease in proline transport was observed from younger to older animals. The 2 intestinal segments showed different behaviours, the 1-day and 1-week-old animals showed the same value in the jejunum, whereas in the ileum a progressive decrease in proline transport was observed from the first week of life. 3. The differences observed in the 2 segments could be attributed to the different rates of growth of the jejunum and ileum with age; the jejunum showed a peak of growth in the second week of life whereas the ileum showed a peak of growth in the first week. Proline transport in the jejunum decreased until the fifth week and remained constant thereafter.
Gonzalez
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E
Department de Ciències Fisiològiques Humanes i de la Nutrició, Facultat de Farmàcia, Universitat de Barcelona, Spain.
Vinardell
M P
MP
D000375:Aging / Q000502:physiology*; D000704:Analysis of Variance; D000818:Animals; D001693:Biological Transport, Active / Q000187:drug effects; D001835:Body Weight; D002645:Chickens; D007082:Ileum / Q000502:physiology; D066298:In Vitro Techniques; D007408:Intestinal Absorption; D007413:Intestinal Mucosa / Q000254:growth & development / Q000502:physiology*; D007421:Intestine, Small / Q000254:growth & development / Q000502:physiology*; D007583:Jejunum / Q000502:physiology; D007700:Kinetics; D007930:Leucine / Q000494:pharmacology; D008297:Male; D008627:Mercuric Chloride / Q000494:pharmacology; D011392:Proline / Q000378:metabolism*
D008627:Mercuric Chloride; D011392:Proline; D007930:Leucine