Acta Scientiarum Naturalium Universitatis Pekinensis

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The Morphology of Endocrine Cells in the Gut Mucosa of the Giant Panda

YANG Guibo, CHEN Maosheng, DENG Zepei, WANG Ping   

  1. College of Life Sciences, Peking University, Beijing, 100871
  • Received:1994-07-01 Online:1995-11-20 Published:1995-11-20

大熊猫胃肠道内分泌细胞的形态学研究

杨贵波,陈茂生,邓泽沛,王平   

  1. 北京大学生命科学学院,北京,100871

Abstract: Endocrine cells containing 5-hydroxytryptamine, somatostatin, gastrin, cholecystokinin, neurotensin, motilin, gastric inhibitorypeptide, glucagon, vasoactive intestinal polypeptide, and endorphin in the mucosae of the fundus, pylorus, duodenum, jejunum, ileum, colon, and rectum of 2 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 mucosae of the 2 giant pandes. The distribution of cell types categorized by the cytoplasmic process indicated that in the 7-year old giant panda, the fundic endocrinecells were mostly round or ovoid, apical and basal cytoplasmic processes were rarely seen; many pyloric endocrine cells pocessed both apical and basal processes; while endocrine cells in the small intestine only pocessed apical process. In the 75-day old giant panda, the cell types of the gut endocrine cells are few than those of the 7-year old one. These results indicate that the structure and the distribution of the morphological types of the endocrine cells in the mucosa of the giant panda might be related to their specific feeding habit.

Key words: Giant Panda, gastrointestinal tract, endocrine cell, morphology

摘要: 为了解大熊猫胃肠道内分泌细胞的形态特点,本文用PAP法对两只大熊猫胃底、幽门腺区、十 二指肠、空肠、回肠、结肠和直肠的五羟色胺、生长抑素、胃素、胆囊收缩素、神经降压素、胃 动素、抑胃多肽、胰高血糖素、血管活性肠肽和内啡肽免疫反应阳性细胞进行了研究。结果表 明,在75d龄个体中胃肠道内分泌细胞的形态类型较少,而7年龄个体中形态类型较为复杂。 对7年龄个体胃肠各段间的形态类型和其相对数量的比较表明,大熊猫胃肠道内分泌细胞可以分 为4型:A型多见于小肠;B型和AB型主要见于幽门区;NP型为胃底区的主要细胞类型。不 同形态类型的胃肠道内分泌细胞在胃肠各段间分布的差异可能与大熊猫的食性有关。

关键词: 大熊猫, 胃肠道, 内分泌细胞, 形态

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