Immunohistochemical study of neruotensin-, pancreatic polypeptide-and gastrin/cholecystokinin-immunoreactive cells in the gastrointestinal tract of the bullfrog, Rana catebeiana during developmental stages
1999
Lee, H.S. (Kyungsan University, Kyungsan (Korea Republic). Faculty of Basic Science, College of Natural Science) | Ku, S.K. | Lee, J.H. (Kyungpook National University, Taegu (Korea Republic). Laboratory of Histology, College of Veterinary Medicine)
To investigate the regional distribution and relative frequency of the neurotensin-, pancreatic polypeptide(PP)- and gastrin/cholecystokinin(Gas/CCK)-immunoreactive cells in the gastrointestinal tract of the bullfrog(Rana catesbeiana) with developmental stages, group of bullfrogs subdivided into the tadpole withhindlegs, metamorphosed bullfrog with tail, 2 weeks after metamorphosed bullfrog and adult bullfrog, were stained by immunohistochemical methods(PAP methods). Neurotensin-immunoreactive cells were observed from the pylorus of the metamorphosed bullfrog with tail, but these cells were not detected after that periods. PP-immunoreactive cells were dectected from the adult bullfrog in the pylorus, duodenum and ileum. These cells were most predominant in the pylorus. Gas/CCK-immunoreactive cells were observed from the adult bullfrog in the pylorus. According to these results, most of immunoreactive cells in the gastrointestinal tract of the bullfrog were appeared after the complete metamorphosed periods, in which the complete differentiation of structure of gastrointestinal tract were occurred, and variable changes of the regional distribution and relative frequency with developmental stages were observed.
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