Immunohistochemical Studies On Endocrine Cells In The Digestive Tract Of Four Reptiles

Identification, distribution and morphology of edocrine cells in the digestive tract of Enmeces chinensis ,Gekko japonicus ,Trachemys scripta and Chinemys reevsii were studied by immunohistochemical method with seven gut hormone antisera. 5HT-IR cells is the only one that extensively distributed in whole digestive tract of four reptiles which distributive mode were different from each other. SS-IR cells were presented in the former part of digestive tract of Chinemys reevsii and Gekko japonicus, however they distributed throughout the digestive tract of Enmeces chinensis and Trachemys scripta. Gas-IR cells were mainly occurred in the stomachus pyloricus or (and)duodenum of four reptiles. The distributive mode of Glu-IR cells and SP-IR cells in the digestive tract were different among four reptiles.PP-IR cells were only rarely detected in the digestive tract of Trachemys scripta . Ins-IR cells were not detected in any of four reptiles. Some common features in identification, distribution and morphor of endocrine cells were found in 4 reptiles, which exist in digestive physiology and life habit. But the differences among 4 reptiles were also significant, which exist in the adaptability to feeding habit and life environment respectively of each reptiles.