活化的巨噬细胞对豚鼠胆囊组织分泌糖蛋白的影响

Effect of activated macrophages on glycoprotein secretion from gallbladder tissue of guinea pig

目的应用组织培养方法,了解高胆固醇饲料及活化的巨噬细胞(M(?))对胆囊上皮细胞合成分泌糖蛋白(GP)的影响。方法豚鼠40只,分为普通饲料组(A 组)与高胆固醇饲料组(B 组),饲养1周。培养胆囊组织,测定其合成分泌 GP 的功能;并加入氢化考的松和腹腔 M(?),观测对胆囊组织合成分泌 GP 的影响。结果 1.B 组比 A 组的腹腔 M(?)活力明显升高。2.培养 B 组胆囊组织,释放入培养液中的 GP 含量比 A 组显著增加。3.在 B 组胆囊组织培养液中加入氢化考的松,胆囊组织释放 GP 明显受抑。4.在 A 组胆囊组织培养液中,加入"普 M(?)",胆囊组织释放 GP 的水平与对照水平接近。加入"高 M(?)",浓度较高时胆囊组织分泌 GP 增强;若同时加入氢化考的松,胆囊分泌的 GP 水平明显下降。结论 1.高胆固醇饲料可致豚鼠胆囊组织合成分泌 GP 功能增强。2.高胆固醇饲料能增强豚鼠 M(?)活力,可促进胆囊组织合成分泌 GP。结合动物胆囊结石模型实验的结果推测,可能与豚鼠M(?)因高胆固醇饲料活化,释放细胞因子 TNF、IL-1等有关。

Objective To study the effects of high cholesterol diet and activated macrophages (M) on glycoprotein secretion from the gallbladder tissue of guniea pig.Method Forty guniea pigs were randomized into group A fed with ordinary diet and group B fed with a diet containing 1.2% cholesterol for one week.Glycoprotein secretion from guinea pig gallbladder was observed in tissue culture using ~3H-glucesamine as a precursor,and in the meantime,with hydrocortisone and activated M to understand the effects on glycoprotein synthesis and secre- tion function of gallbladder epithelium.Results The activity of peritoneal M was significantly increased in guinea pigs fed with high cholesterol diet.High cholesterol diet induced significant release of ~3H-glucosamine-labeled gly- coprotein into the tissue culture medium as compared with the control level of guinea pig fed with normal diet.The gallbladder tissues were co-cultured for 16 hours with peritoneal M of guinea pig fed with high cholesterol diet. Mucin secretion had an evident increase compared with the controls (with the peritoneal M of guinea pig fed with normal diet at 10~4,10~6 cell/ml).Hydrocortisone (10^(-6),10^(-5),10^(-4)mol/l) caused a reversible dose-dependent inhibition on glycoprotein secretion from the gallbadder tissues of guinea pig fed with high cholesterol diet.Hydro- cortisone (10^(-4)mol/l) also inhibited the stimulatory effect of M activated by high cholesterol diet on glycoprotein hypersecretion in the gallbladder tissues of guinea pig fed with ordinary diet.Conclusion (1) High cholesterol diet can induce the increase of glycoprotein secretion from gallbladder tissues of guinea pig;(2) M can be actvi- ated by high cholesterol diet,which stimulates glycoprotein secretion from the gallbladder tissues of guinea pig. Considering the results of experiment using an animal gallbladder stone model,these findings suggest that the hy- persecretion of glycuprotein from guinea pig gallbladder tissue may be related to guinea pig M activated by high cholesterol diet and stimulated to release TNF,IL-I,etc.