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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Distribution of vasoactive intestinal peptide, bombesin, and gastrin-cholecystokinin like peptides in the avian intestinal tract and brain.

The distribution of vasoactive intestinal peptide ( VIP), bombesin and gastrin-cholecystokinin in the chicken was studied by radioimmunoassay of tissue extracts. VIP was present in high concentrations in colon (186 +/- 29 pmol/g), cloaca (116 +/- 27 pmol/g), jejunum (97 +/- 14 pmol/g) and pancreas (15 +/- 3 pmol/g) but not detected in lung, liver or thymus. The highest concentration of bombesin was in the proventriculus (92 +/- 13 pmol/g), negligible in remaining gut but found in brain. Gel chromatography indicated two forms of bombesin: one form eluting with bombesin-14 and the other with gastrin releasing peptide. Gastrin-like immunoreactivity was found in low levels in the gut and brain. The concentrations were higher with an antiserum which cross reacted with the carboxy terminus common to gastrin-17 and CCK compared to a gastrin specific antisera (P less than 0.01). This suggests that the carboxy terminal region has been conserved during evolution. Each distribution pattern of bombesin, VIP and gastrin CCK is different, and distinct from that found in mammals, suggesting specific roles for these peptides in birds.[1]

References

  1. Distribution of vasoactive intestinal peptide, bombesin, and gastrin-cholecystokinin like peptides in the avian intestinal tract and brain. Shulkes, A., Stephens, D., Hardy, K.J. Comp. Biochem. Physiol. C, Comp. Pharmacol. Toxicol. (1983) [Pubmed]
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