糖精是一种人工制造的食品添加剂。由于它的广泛应用,有不少有关糖精可能致癌的报导。作者通过给大鼠喂饲含高浓度糖精的膳食来观察其对免疫功能的影响。实验中作者给CD-COBS大鼠喂饲含1、2.5和5％糖精的膳食30～54天,在停止喂含糖精的膳食时,给大鼠腹腔注射4×10~8SRBC(绵羊红细胞)进行免疫,4天后观察PFC(抗体形成细胞)的 Saccharin is a kind of artificial food additives. Because of its wide range of applications, there are many reports that saccharin may cause cancer. The authors observed their effects on immune function by feeding rats with a diet containing high concentrations of saccharin. In the experiment, the authors fed a diet containing 1, 2.5 and 5% saccharin to a CD-COBS rat for 30 to 54 days. When stopping the saccharin-containing diet, the rats were intraperitoneally injected with 4 × 10 ~ 8SRBC (sheep red blood cells) Immunized, PFC (antibody-forming cells) were observed after 4 days