Favorable response to subcutaneous administration of infliximab in rats with experimental colitis

作     者：John K Triantafillidis Apostolos E Papalois Aikaterini Parasi Emmanuel Anagnostakis Stavros Burnazos Aristofanis Gikas Emmanuel G Merikas Emmanuel Douzinas Maria Karagianni Helen Sotiriou 

作者机构：Department of Gastroenterology Experimental Research Unit Department of Pathology 

出 版 物：《World Journal of Gastroenterology》 (世界胃肠病学杂志（英文版）)

年 卷 期：2005年第11卷第43期

页      面：6843-6847页

核心收录：

学科分类：1002[医学-临床医学] 100201[医学-内科学(含：心血管病、血液病、呼吸系病、消化系病、内分泌与代谢病、肾病、风湿病、传染病)] 10[医学] 

主　　题：Experimental colitis Infliximab Inflammatorybowel disease Tumor necrosis factor-alpha Malondialdehyde Ulcerative colitis 

摘      要：AIM： To investigate the influence of infliximab （Remicade） on experimental colitis produced by 2,4,6,trinitrobenzene sulfonic add （TNBS） in rats. METHODS： Thirty-six Wistar rats were allocated into four groups （three groups of six animals each and a fourth of 12 animals）. Six more healthy animals served as normal controls （Group 5）. Group 1： colitis was induced by intracolonic installation of 25 mg of TNBS dissolved in 0.25 mL of 50% ethanol and infliximab was subcutaneously administered at a dose of 5 mg/kg BW; Group 2： colitis was induced and infliximab was subcutaneously administered at a dose of 10 mg/kg BW; Group 3： colitis was induced and infliximab was subcutaneously administered at a dose of 15 mg/kg BW; Group 4： colitis was induced without treatment with infliximab. Infliximab was administered on d 2-6. On the 7^th d, all animals were killed. The colon was fixed in 10% buffered formalin and examined by light microscopy for the presence and activity of colitis and the extent of tissue damage. Tumor necrosis factor-alpha （TNF-α） and malondialdehyde （MDA） were also measured. RESULTS： Significant differences concerning the presence of reparable lesions and the extent of bowel mucosa without active inflammation in all groups of animals treated with infliximab compared with controls were found. Significant reduction of the tissue levels of TNF-α in all groups of treated animals as compared with the untreated ones was found （0.47＋0.44, 1.09＋0.86, 0.43＋0.31 vs 18.73＋10.53 respectively）. Significant reduction in the tissue levels of MDA was noticed in group 1 as compared to group 4, as well as between groups 2 and 4. CONCLUSION： Subcutaneous administration of infliximab reduces the inflammatory activity as well as tissue TNF-α and MDA levels in chemical colitis in rats. Infliximab at a dose of 5 mg/kg BW achieves better histological results and produces higher reduction of the levels of TNF-α than at a dose of 10 mg/kg BW. Infliximab at a dose of 5 mg/kg BW produces