关键词: 大熊猫, 胃肠道, 内分泌细胞, 分布

Abstract: Endocrine cells containing 5-hydroxytryptamine,somatostetln, gastrin, cholecystokinin , neurotensin, motilin, gastric inhibitory polypeptide, glucagon，vasoactive intestinal peptide,and endorphin in the mucosa of the fundus,pylorusduodenum,jejunum,ileum，colon，and rectum of 3 giant pandas were studied by PAP method to gain an insight into the adaptive characteristics for the special feeding habit．The former 8 kinds of endocrine cells were detected in the mucose of the 75 day-old and7 year-old giant pandas．Quantitative analyses of inter-and intra-segmental differences in the frequency of occurrence of each kind of the endocrine cells in the stomach and small intestine 0f the 7 year-old individual showed that:5-HT immunoreaetive cells occur most frequently in the jejunum, which has not been observed in the other mammals. Cholecystokinin、gastrin、somatostatin immunoreaetive cells occur most frequently in the pyloric antrum,while motilin immunoreactive cells occur most frequently in the duodenum , gastric inhibitory peptide、neurotensin、glucagon immunoreaetive cells occur most frequently in the ileum ．Endocrine cells distribute principally in the lower two-thirds of the fundic gland，near the neck portion of the pyloric gland,and in the crypts of Lieber-kuhn's gland with the exception of 57% of neurotensin immunoreactive cells distribute in the mucosa of the villus. These results indicate specific patterns of distribution of the endocrine cells in the mucosa of the giant panda, which might be related both to their specific feeding habit and their taxonomicposition.

Key words: Giant Panda (Ailuropoda melanoleuca), Gastrointestinal tract：Endocrine cel1, Distribution