牦牛胃肠胰(GEP)中高糖素免疫反应细胞的分布及形态学研究

STUDY ON THE DISTRIBUTION AND MORPHOLOGY OF THE GLUCAGON- IMMUNOREACTIVE CELLS IN THE GASTROENTEROPANCREATIC(GEP) ENDOCRINE SYSTEM OF YAK

牦牛GEP系统中,从十二指肠开始,高糖素免疫瓜细胞分布密度呈现上升趋势。但盲肠除外。空肠、回肠、直肠分布密度较高。肠中高糖素免疫反应细胞形态多为锥体形、长颈瓶形;其次为椭圆形和棱形。高糖素免疫反应细胞为棕黄色——棕灰色颗粒。颗粒多分布于核周围和基底部。小肠中高糖素免疫反应细胞多位于肠腺中,绒毛中较少。大肠中高糖素免疫反庆细胞多位于肠腺中部了上部。肠上皮中也有一定数量的高糖素免疫反应细胞存在。腺胰中高糖素免疫反应细胞多居于胰岛周边。其颗粒多为棕黄色。胰腺腺泡中,高糖素免疫反应细胞为数很少。

The distribution density of glucagon-immunoreactive (GIR)cell appears in the ascendant in the downward part by duodenum of yak gastroenteropancreatic(GEP) system. The density is higher in jejunum,ileum and rectum except cecum. In the intestinal part GIR cell is usually in the shape of cone, long-neck-bottle, shuttle and ellipse. The GIR cells are brownish-yellow or brownish-grey granules. They usually situated around the nucleus and in the basal part of the cell. The GIR cells in small intestine are usually situated in the intestinal glands,a few in villus. The GIR cells in large intestine usually lie in the middle and upper part of the intestinal glands and a number of them in intestinal epithelium. The GIR-cells in pancreas are aroud the islets.brownish-yellow granules in appearance. A few GIRcells exist in pancreatic acinus.