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Detection of promoter hypermethylation of Wnt antagonist genes in fecal samples for diagnosis of early colorectal cancer
  • ISSN号:1007-9327
  • 期刊名称:《世界胃肠病学杂志:英文版》
  • 时间:0
  • 分类:R574.62[医药卫生—消化系统;医药卫生—临床医学;医药卫生—内科学]
  • 作者机构:[1]武汉大学中南医院消化内科消化系病研究中心湖北省肠病医学临床研究中心,430071
  • 相关基金:国家自然科学基金(81101868);湖北省自然科学基金(2011CDB505)
中文摘要:

目的探讨白云母对碘乙酰胺诱导的大鼠溃疡性结肠炎的作用及其可能机制。方法雌性SD大鼠通过直肠给药注入碘乙酰胺,诱导溃疡性结肠炎模型。48只大鼠用随机数字表法分成6组:对照组、模型组、低剂量白云母组(360mg/kg)、高剂量白云母组(720mg/kg)、5-氨基水杨酸(5-ASA)组和白云母联合5-ASA组(联合治疗组),每组8只。药物治疗7d后评估各组大鼠体重、疾病活动指数(DAI)、形态学损伤和组织学评分。用酶联免疫吸附试验检测肿瘤坏死因子仅(TNF-仅)、白细胞介素8(IL-8)的浓度和髓过氧化物酶(MPO)的活力,免疫组织化学方法评价核因子KB的活性。组问比较采用方差分析或秩和检验。结果各组大鼠的治疗后体重、形态学评分、组织学评分、血浆TNF—O/_浓度,肠组织MPO活力和核因子KB活性均与白云母剂量显著相关(r=0.573、-0.647、-0.569、-0.681、-0.811、-0.842,均P〈0.05)。高剂量白云母组与5-ASA组相比在治疗后体重、DAI、形态学损伤、组织学评分、IL-8浓度、TNF-a浓度、MPO活力、核因子KB活力方面差异均无统计学意义【(166±5)比(167±5)g,0.33(0.00,1.17)比0.17(0.00,0.83),2.50(2.00,4.00)比3.00(2.00,3.00),3.00(2.00,3.00)比2.50(2.00,3.00),(109±17)比(111±15)pg/ml,(166±38)比(155±45)pg/ml,(52±6)比(49±4)U/g,7.39±0.42比7.41±0.34,均P〉0.05]。联合治疗组的MPO活力和核因子KB活性低于5-ASA组[(40±4)比(49±4)u/g、4.67±0.72比7.41±0.34,均P〈0.05],其余指标与5-ASA组差异均无统计学意义(均P〉0.05)。结论白云母直肠给药可以改善碘乙酰胺诱导的大鼠实验性结肠炎症,其机制可能与调节炎症反应有关。白云母有望成为溃疡性结肠炎治疗的候选药物。

英文摘要:

Objective To explore the efficacy of muscovite on iodoacetamide -induced ulcerative colitis in rats and elucidate its possible mechanism. Methods Ulcerative colitis was induced in female Sprague-Dawley (SD) rats by an intracolonic injection of iodoacetamide. A total of 48 rats were divided randomly(by the method of random digits table) into 6 groups: control group, model group, low-dose muscovite group (360 mg/kg), high-dose muscovite group (720 mg/kg) , 5-aminosalieylie acid (5-ASA) group and muscovite plus 5-ASA group (combined treatment) , and each group had 8 rats. The body weight, disease activity index (DAI), macroscopic damage and microscopic score of rats in each group were subsequently evaluated after dosing for 7 days. The protein levels of tumor necrosis factor-a ( TNF-a ) , interleukin-8 (IL-8) and myeloperoxidase (MPO) activity were detected by enzyme-linked immunosorbent assay(ELISA) while the activity of nuclear facor( NF)-KB was determined by immunohistochemistry. One way ANOVA and rank-sum test were used. Results After doing, body weight macroscopic damage, microscopic score, TNF-ct concentration, MPO and NF-KB activity of rats in each group were all significantly correlated with the dose of muscovite ( r = 0. 573, - 0. 647, - 0. 569, - 0. 681, - 0. 811, - 0. 842, all P 〈 0. 05). High-dose muscovite group had no significant difference with 5-ASA group in body weightt, DAI, macroscopic damage, microscopic score, IL-8 concentration, TNF-cL concentration, MPO and NF-KB activities ( ( 166± 5) vs ( 167 ± 5) g, 0. 33 (0. (30, 1.17) vs 0. 17 (0.00, 0. 83), 2. 50 (2.00, 4.00) vs 3.00 (2.00, 3.00), 3.00 (2.00, 3.00) vs 2.50 (2.00, 3.00), (109 ±17) vs (111 ±15) pg/ml,(166 ±38) vs (155 ±45) pg/ml, (52 ±6) vs (49 ±4) U/g, 7.39 ±0.42 vs7.41 ±0.34, all P〉 0. 05 ). The MPO and NF-KB activities of combined treatment group were lower than those of 5-ASA group ( (40 ±4) vs ?

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  • 《世界胃肠病学杂志:英文版》
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  • 国际标准刊号:ISSN:1007-9327
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