家鸽消化道5-羟色胺细胞的形态与分布

摘 要：采用ABC(avidin-biotin-peroxidase complex)免疫组织化学方法，观察家鸽（Columba livia domesticus ）消化道内5-羟色胺(5-HT)免疫阳性内分泌细胞的分布及形态。结果显示，除食管外，5-羟色胺细胞从胃到直肠各段均有分布。细胞分布密度呈波浪式，其中直肠部分布密度最高(5.20±1.94)，回肠部次之(3.75±1.29)，胃部最低(1.7±0.80)。5-HT阳性细胞广泛分布于消化道上皮细胞之间、上皮基部、腺泡上皮细胞之间。形态多样，呈圆形、锥体形、梭形等。根据形态我们认为家鸽消化道5-HT细胞具有内、外分泌两种作用途径。

The Shape and Distribution of 5-HT Cells in Digestive Tract of Columba livia domesticus

Abstract：Immunohistochemical localization and morphology of 5-Hydroxytryptamine immunoreactive cells (5-HT cells) in the digestive tract of Columba livia domesticus have been investigated by using the ABC（avidin-biotin-peroxidase complex）immunostaining technique.The results indicated that the 5-HT positive immunoreactive cells could be observed throughout the digestive tract, from stomach to rectum. The density curve appeared wavelike and their density is the highest in the cardiac part of rectum(5.20±1.94) ,followed by the ileum(4.55±3.14). The lowest cell density is found in the stomach(1.7±0.80).The 5-HT cells distribute at the bottom of epithelial cells, between epithelial cells, between glandular epithelial cells or in the lamina propria.The 5-HT cells have different shapes including round, shuttle-like, tapering and other shapes. Anthors suggest that 5-HT positive immunoreactive cells in the digestive tract of Columba livia domesticus should have both endocrine and exocrine functions.