实验动物科学 ›› 2017, Vol. 34 ›› Issue (03): 43-48.

• 研究 论著 • 上一篇    下一篇

异体抗原联合醋酸诱导大鼠慢性溃疡性结肠炎模型的优化与评价

  

  1. ( 1. 云南省昆虫生物医药研发重点实验室,大理 671000) ( 2. 药用特种昆虫开发国家地方联合工程研究中心,大理 671000) ( 3. 中国西南药用昆虫及蛛形类资源开发利用协同创新中心,大理 671000) ( 4. 大理大学实验动物中心,大理 671000) ( 5. 大理白族自治州人民医院病理科,大理 671000)
  • 出版日期:2017-06-30 发布日期:2017-09-07
  • 基金资助:

    <p>基金项目: 国家自然科学基金( No. 81660605; No. 81260676; 81260475) ; 药用特种昆虫开发国家地方联合工程研究中心创新能力建设项目( No. 云发改高技[2015]395) ; 云南省昆虫生物医药研发重点实验室专项经费( No. 2015DG030) ; 云南省 2011 协同创新中心项目( [2012]25) ; 云南省科技计划项目青年项目( No. 2016FD074) 。</p>

Optimization and Evaluation of Allogeneic Antigen Combined with Acetic Acid in Rats with Chronic Ulcerative Colitis

  • Online:2017-06-30 Published:2017-09-07

摘要: 摘要: 目的 优化及评价异体抗原联合醋酸诱导溃疡性结肠炎大鼠模型的建立方法。方法 以不同的抗原乳化液蛋白含量、不同醋酸浓度及醋酸在大鼠体内滞留时间作为变量,根据大鼠的疾病活动指数( DAI) 评分和结肠黏膜损伤指数( CMDI) 评分,筛选出最优的蛋白浓度、醋酸浓度及醋酸在大鼠体内滞留时间组合。结果 固定醋酸体内滞留时间为 13 s,以醋酸浓度和抗原乳化液蛋白用量为变量进行三水平的正交实验。抗原乳化液蛋白用量为 0. 1 mL 浓度 80 mg /mL,5% 醋酸溶液 1 mL 的造模组与正常组相比,DAI 评分、CMDI 评分差异显著,存活率高,炎症适宜。固定抗原乳化液蛋白浓度及醋酸浓度,分别考察醋酸在体内滞留时间为 13、15、18、20、22 s 造模情况,醋酸在体内滞留时间为 15 s 时,模型组 DAI 评分、CMDI、HS 评分与正常组相比差异显著,存活率高,炎症较为适宜。结论最佳 UC 造模条件为: 5% 醋酸溶液 1 mL 灌肠,滞留 15 s 后,4 mL 生理盐水冲洗,再以 1 mL 浓度为 8 mg /mL 的抗原乳化液蛋白灌肠,30 min 后,4 mL 生理盐水冲洗。造模后的溃疡性结肠炎模型成功率高,重复性好,死亡率低,大鼠结肠炎症严重程度适宜,且病变机制与人类 UC 相符,此复合型溃疡性结肠炎模型适合用于 UC 相关研究。

关键词: <, p>, 免疫, 醋酸, 溃疡性结肠炎<, /p>

Abstract: Abstract: Objective Establishment of rat model of ulcerative colitis ( UC) induced by optimization of allogeneic antigen combined with acetic acid and evaluate the value of the model. Method With different antigenic emulsion protein content,different acetic acid concentration and acetic acid retention time in rats as variables,according to the rat disease activity index ( DAI) score,colon mucosal injury index ( CMDI) score,and histopathological( HS) score,screened the optimal conditions to set up rat UC model. Result The first part orthogonal experiment was carried out with the concentration of acetic acid and the amount of allogeneic antigen as variables,but with the settled retention time of acetic acid as 13 s. Compared with the normal group,the model group coloclysis with 1 mL 8 mg /mL antigenic emulsion protein and 1 mL 5% acetic acid was the suitable condition for inflammation which was significant difference at DAI,CMDI scores,had appropriate inflammation and high survival rate. The second part experiment was carried out with the settled optimizational concentration of acetic acid and the amount of allogeneic antigen from first part but change the retention time of acetic acid as 13,15,18,20,and 22 s. Compareing with the normal group,the model group of 15 s retention time of acetic acid was the better one with good DAI,CMDI,and HS scores,scores,appropriate inflammation and high survival rate. Conclusion The optimized method of setting up UC model was as follow: coloclysis with 1 mL 5% acetic acid solution,washing with 4 mL water after retaining for 15 s,then coloclysis with 1 mL antigen emulsion protein solution ( 8 mg /mL) and washing with 4 mL water again after retaining for 30 min. This method had good reproducibility,low mortality,and the severity of colonic inflammation in rats,and with the similar mechanism of human UC. This complex ulcerative colitis model is suitable for the screening of new drugs in UC.

Key words: <p>immunity, acetic acid, Ulcerative colitis</p>

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