经结肠带回肠限制口径植入式重塑回盲瓣

正常回盲瓣具有节制小肠排空、阻止结肠内容物逆流、保证肠道消化吸收顺利进行的功能.回盲瓣切除后,可出现严重的吸收障碍和营养不良等并发症.本文作者设计了经结肠带回肠限制口径植入式重塑回盲瓣,通过动物实验从流体力学、肠道菌群等方面研究重塑回盲瓣的功能,报道如下.     

欧洲红豆杉对试验动物的毒性

作者研究了欧洲红豆杉 Taxus baccataL.叶和茎的甲醇提取物及精制生物碱部位的毒性。该植物叶和茎的甲醇提取物 TXA-1和TXB-1各用酸碱法提取得粗生物碱部位TXA-2和 TXB-2,其主要含紫杉烷。TXA-2和 TXB-2分别经硅胶柱进一步精制得TXA-3和 TXB-3。在急性毒性研究中,albino小鼠均腹腔注射单次量 TXA-1、2、3和TXB-1、2、3,测定这6种试药的 LD_(50)。给药后     

STUDY ON THE MECHANISM AND EFFECTS OF GLY-TYR-NH2 AND GLY-TYR-LYS ON RAT LUTEAL CELLS IN VITRO

The action of Gly-Tyr-NH2,(GY-NH2) and Gly-Tyr-LYS(GYK) on ^125I-LH binding,cAMP accumulation and progesterone production was investigated.Incubation of rat luteal cells for 2.5h with GH-NH2 and GYK at dosage of 0.2mmol/L caused a significant inhibition of basal and gonadotropin-stimulated steroidogenesis.GYNH2 and GYK were also foumnd to reduce cAMP formation in response to hCG.The activity of adenylate cyclase of luteal cells was inhibitd by 0.2mmol/LGY-NH2 and GYK.GY-NH2 and GYK at a concentration of 0.2mmol/L were not found to have an inhibitory effect on 8Br-cAMP-stimulated progesterone production.GY-NH2 and GYK did not affect ^125I-LH binding to LH receptors on the luteal cellsurface.These results suggest that GY-NH2 and GYK inhibit steroidogenesis at the step of gonadotropin-stimulated c AMP for mation in luteal cells.Adenylate cyclase in luteal cells was also inhibited.     

改革外科手术学教学 培养实用型人才

针对我院外科手术学教学目前存在的实验动物资源匮管乏、实验室条件尚不完善、学生实践机会较少等直接影响教学进度和安排，有碍于教学质量的提高等主要问题，我们经过积极探索和可行性实验，着手于开发实验动物资源、节约经费、改善教学条件、加强教学环节和建立考核制度的改革，以促进教学质量的提高，为培养实用型人才创造条件。     

川芎嗪和维拉帕米对缺血性急性肾衰初期保护效应的实验研究

１８只犬切除右肾，钳夹左肾动脉６０分的肾缺血模型，再灌注５小时。将动物随机分成对照组、川芎嗪组及维拉帕米组。观察尿量、菊糖清除率、利钠指数、平均动脉压及心率；再灌注５小时取肾组织作形态学检查。结果显示川芎嗪对肾功能及形态有保护作用，维拉帕米则无此作用，提示在手术中有肾缺血时以川芎嗪作为肾保护药物优于维拉帕米。