TY - JOUR
T1 - In vivo neural isolation of the canine jejunoileum
T2 - Temporal adaptation of enteric neuropeptides
AU - Nelson, D. K.
AU - Sarr, M. G.
AU - Go, V. L.W.
PY - 1991
Y1 - 1991
N2 - This study was designed to assess temporal changes in concentrations of neuromodulatory peptides in plasma and gastrointestinal tissues after in vivo neural isolation of the entire canine jejunoileum. Fasting plasma and transmural biopsy specimens of stomach, duodenum, jejunum, ileum, and colon were obtained from the same dogs before and two, six, and 12 weeks after in situ neural isolation of the entire jejunoileum. Concentrations of vasoactive intestinal peptide, substance P, and neuropeptide Y were determined by quantitative radioimmunoassay. Tissue concentrations of vasoactive intestinal peptide and substance P in the neuraily isolated regions increased progressively with time (198% and 217% average maximal increases, respectively), while fasting plasma concentrations changed little. Neuropeptide Y concentrations in plasma and in the jejunoileum were decreased (by 30% to 70%) at two weeks and remained decreased thereafter. Temporal changes in tissue neuropeptide concentrations occur in the neuraily isolated jejunum and ileum. These adaptive changes in the neuropeptidergic innervation of the gut may play a role in the alterations in enteric function that occur after extrinsic denervation and after intestinal transplantation.
AB - This study was designed to assess temporal changes in concentrations of neuromodulatory peptides in plasma and gastrointestinal tissues after in vivo neural isolation of the entire canine jejunoileum. Fasting plasma and transmural biopsy specimens of stomach, duodenum, jejunum, ileum, and colon were obtained from the same dogs before and two, six, and 12 weeks after in situ neural isolation of the entire jejunoileum. Concentrations of vasoactive intestinal peptide, substance P, and neuropeptide Y were determined by quantitative radioimmunoassay. Tissue concentrations of vasoactive intestinal peptide and substance P in the neuraily isolated regions increased progressively with time (198% and 217% average maximal increases, respectively), while fasting plasma concentrations changed little. Neuropeptide Y concentrations in plasma and in the jejunoileum were decreased (by 30% to 70%) at two weeks and remained decreased thereafter. Temporal changes in tissue neuropeptide concentrations occur in the neuraily isolated jejunum and ileum. These adaptive changes in the neuropeptidergic innervation of the gut may play a role in the alterations in enteric function that occur after extrinsic denervation and after intestinal transplantation.
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U2 - 10.1136/gut.32.11.1336
DO - 10.1136/gut.32.11.1336
M3 - Article
C2 - 1721599
AN - SCOPUS:0025953322
SN - 0017-5749
VL - 32
SP - 1336
EP - 1341
JO - Gut
JF - Gut
IS - 11
ER -