Protective effect of guava leaf extract on colonic tissues with ulcerative colonitis induced by trinitrobenzene sulfonic acid in rats
- Author:
- No author available
- Journal Title:
- WORLD CHINESE JOURNAL OF DIGESTOLOGY
- Issue:
- 1
- DOI:
- 10.3969/j.issn.1009-3079.2007.01.013
- Key Word:
- 番石榴叶提取物;抗氧化作用;调节免疫;结肠炎;大鼠
Abstract： 目的:研究番石榴叶提取物对大鼠结肠炎组织损伤的保护作用及其机制.方法:用健康Wistar大鼠建立大鼠结肠炎模型,灌胃用药2 wk后,评价大鼠结肠黏膜损伤指数(CMDI),检测结肠组织髓过氧化物酶(MPO)及超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量和细胞肿瘤因子(TNF)、白细胞介素-8(IL-8)、白细胞介素-10(IL-10)水平.结果:不同剂量番石榴叶提取物(200,500,800 mg/kg)灌胃均能不同程度降低模型大鼠CMDI(2.62±0.47,2.06±0.54,1.83±0.43 vs 3.15±0.39,P＜0.05,P＜0.01,P＜0.01),MPO活性(2240.78±479.26,2078.42±377.91,1748.85±236.71 nkat/g vs 2695.37±624.79 nkat/g P＜0.05,P＜0.01,P＜0.01),减少MDA含量(2.16±0.41,1.97±0.35,1.96±0.30,P＜0.05,P＜0.01,P＜0.01),提高SOD活性(3618.06±538.44,3756.92±577.45,4197.51±375.74 nkat/g vs 2663.37±603.79,P＜0.05,P＜0.01,P＜0.01),降低TNF(2.65±0.40,2.51±0.47,2.21±0.41 μg/L vs 3.30±0.63 μg/L,P＜0.05,P＜0.01,P＜0.01)、IL-8(1.20±0.33,1.05±0.24,0.92±0.13 μg/L vs 1.53±0.38 μg/L,P＜0.05,P＜0.01,P＜0.01)、IL-10(39.36±9.65,50.26±11.32.59.68±13.65 ng/L vs 30.74±12.91 ng/L,P＜0.05,P＜0.01,P＜0.01)水平,且与用药剂量呈一定量效关系.结论:番石榴叶提取物通过拮抗氧化、免疫调节、损伤修复作用缓解结肠炎大鼠炎症反应,减轻结肠损伤.
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