Temporal pattern of appearance and distribution of cholecystokinin-like peptides during development in Xenopus laevis.

作者: Frederick W. Scalise , Steven R. Vigna

DOI: 10.1016/0016-6480(88)90213-4

关键词: Gastrointestinal hormoneDuodenumCholecystokininHistolysisMetamorphosisNeuropeptideEndocrinologyBiologyXenopusInternal medicineEnteroendocrine cell

摘要: Cholecystokinin (CCK) radioimmunoassay and immunocytochemistry were used to localize the expression of CCK-like peptides in gut, brain, skin Xenopus laevis during development from fertilization through metamorphosis adult form. first detected gut shortly before food was observed lumen intestine. This immunoreactivity (CCK-li) localized endocrine cells duodenal mucosa. Gut CCK-li decreased coincident with histolysis. After metamorphosis, appeared newly organized gastric antrum at Nieuwkoop-Faber stage 62–63 reappeared reconstituted duodenum 63–64. In both cases, cells. duodenum, appearance preceded functional activity its target tissues. increased brain primary differentiation again metamorphic climax coincidentally hypothalamo-hypophysial system. Brain then declined transition larva adult. We conclude that presence larval does not induce CCK may play a role regulating gastrointestinal tract X. laevis.

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