大鼠小肠甘丙素在肠型放射病时的变化

本文用免疫细胞化学(ICC)、H.E染色及显微分光光度计测定等技术,对20Gyγ线肠型放射病时大鼠小肠GAL神经的免疫反应性结构做了定性和定量分析。结果如下(1)照后小肠粘膜层损伤随时间延长而加重。(2)照后各组小肠GAL-LI神经元胞体无明显改变,而GAL纤维出现排列紊乱。(3)照后大鼠小肠内GAL的含量有下降趋势,且照后48h和72h组与非照射组之间存在显著差别(P<0.01)。作者结合GAL在肠道的生理功能,将照射后小肠GAL的变化规律与肠型放射病的病理特征及过程相联系,推测照后GAL的变化可能与受照后小肠运动机能、供血障碍以及粘膜损伤等病理改变有关。

The Changes of Intestinal Galanin in Rats with Acute Intestinal Radiation Sickness

changes of galanin in the small intestines of the rats which were inflicted with acute intestinal radiation sickness (AIRS) by exposing to 20 Gy gamma rays were studied with immunocytochemistry (ICC) , HE staining of tissue sections, and microspectrophotometer. It was found that the damage of intestinal mucosa was being intensified as AIRS progressed; there no marked change of GAL-LI neurons but the arrangement of GAL-LI fibers was disordered in the irradiated rats as compared with those of the control; the galanin content of the small intestines was significantly tower in the irradiated rats than in the control especially in the 48th and 72nd hour after irradiation (P<0.01). Considering the physiological function of galanin in the small intestines and the characteristics of the pathological changes of AIRS, the authors suggest that the changes of galanin in the irradiated small intestines are closely related to the disturbance of intestinal motility, interference of blood circulation, and mucosa damage resulting from AIRS.