美洲大蠊提取物Ento-A对湿热型溃疡性结肠炎模型大鼠的改善
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篇名: | 美洲大蠊提取物Ento-A对湿热型溃疡性结肠炎模型大鼠的改善 |
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摘要: |
摘 要 目的:研究美洲大蠊提取物Ento-A对湿热型溃疡性结肠炎(UC)模型大鼠的改善作用。方法:将70只大鼠随机分为正常 对照组(n=8)和造模组(n=62),造模组大鼠采用高糖高脂、辛辣饮食联合2,4,6-三硝基苯磺酸灌肠法复制湿热型UC动物模型。 将造模成功的48只大鼠随机分为模型对照组、美沙拉嗪组(300 mg/kg)、肠炎宁(300 mg/kg)和Ento-A低、中、高剂量组(50、100、 200 mg/kg,以提取物计),每组8只。正常对照组和模型对照组大鼠灌胃生理盐水,其余各组大鼠灌胃相应药物,每天1次,连续给 药14 d。末次给药后,对大鼠疾病活动指数(DAI)、结肠黏膜损伤指数(CMDI)及病理组织学(HS)进行评分,测定大鼠脾指数、肝 指数和结肠指数,并采用酶联免疫吸附法测定大鼠血清中白细胞介素8(IL-8)、IL-17、超氧化物歧化酶(SOD)、丙二醛(MDA)水平 和结肠组织中IL-2、前列腺素E(
2 PGE2)、髓过氧化物酶(MPO)水平。结果:与正常对照组比较,模型对照组大鼠DAI评分、CMDI 评分、HS评分、结肠指数以及血清中IL-8、IL-17、MDA水平和结肠组织中MPO、PGE2水平显著升高(P<0.01),血清中SOD水平和结肠组织中 IL-2 水平显著降低(P<0.01)。与模型对照组比较,Ento-A 高剂量组大鼠 DAI 评分、CMDI 评分及血清中 IL-17、
MDA水平和结肠组织中PGE2水平显著降低(P<0.05或P<0.01),血清中SOD水平和结肠组织中IL-2水平显著升高(P<0.01); Ento-A中剂量组大鼠CMDI评分、HS评分以及血清中IL-8、IL-17、MDA水平和结肠组织中PGE2、MPO水平显著降低(P<0.05或 P<0.01),结肠组织中 IL-2 水平显著升高(P<0.01);Ento-A 低剂量组大鼠 HS 评分以及血清中 IL-17、MDA 水平和结肠组织中 MPO、PGE2水平显著降低(P<0.05或P<0.01),血清中IL-2水平显著升高(P<0.01)。结论:美洲大蠊提取物Ento-A可能通过调 节免疫系统平衡、减少炎症损伤,发挥其对湿热型UC模型大鼠的改善作用。
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ABSTRACT: |
ABSTRACT OBJECTIVE:To study the improvement effect of Periplaneta americana extract Ento-A on damp-heat ulcerative colitis(UC)model rats. METHODS:Totally 70 rats were randomly divided into normal control group(n=8)and modeling group (n=62). The damp-heat UC model was induced in modeling group by high sugar,high fat,spicy diet combined with 2,4, 6-trinitrobenzene sulfonic acid enema. 48 modelrats were randomly divided into model control group,mesalazine group (300 mg/kg),Changyanning group(300 mg/kg)and Ento-A low-dose,medium-dose and high-dose(50,100,200 mg/kg,calculated by the extract),with 8 rats in each group. Normal control
group and model control group were given normal saline intrsgastrically,and other groups were given relevant medicine
intragastrically,once a day,for consecutive 14 days. After last administration, disease activity index (DAI), colonic
mucosal injury index (CMDI) and histopathological score (HS)of rats were determined. The spleen index,liver index
and colon index in rats were determined. The serum levels of IL-8,IL-17,SOD and MDA,colonic levels of IL-2,PGE2
and MPO were detected by ELISA. RESULTS:Compared with normal control group,the DAI score,CMDI score,HS score,colonic index,the serum levels of IL-8,IL-17 and MDA, colonic levels of MPO and PGE2 were increased significantly(P<0.01);serum level of SOD and colonic level of IL-2 were decreased significantly (P<0.01). Compared with model control group,DAI score,CMDI score,serum levels of IL-17 and MDA,colonic levels of PGE2 were decreased significantly in Ento-A high-dose groups(P<0.05 or P<0.01),while serum level of SOD and colonic level of IL-2 were increased significantly(P<0.01). CMDI score and HS score,serum levels of IL-8,IL-17 and MDA,colonic levels of PGE2 and MPO were decreased significantly in Ento-A medium-dose group(P<0.05 or P<0.01), while colonic level of IL-2 was increased significantly(P<0.01). HS score,serum levels of IL-17 and MDA,colonic levels of MPO and PGE2 were decreased significantly in Ento-A low-dose group(P<0.05 or P<0.01),while serum level of IL-2 was increased significantly(P<0.01). CONCLUSIONS:P. americana extract Ento-A may play improvement effect on damp-heat UC rats by regulating immune system balance and reducing inflammatory damage.
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期刊: | 2020年第31卷第1期 |
作者: | 张晶娜,陶 磊,张 俊,王木岭,陈 莹,刘 衡,张成桂,何 苗 |
AUTHORS: | ZHANG Jingna,TAO Lei,ZHANG Jun,WANG Muling,CHEN Ying,LIU Heng,ZHANG Chenggui,HE Miao |
关键字: | 美洲大蠊;提取物;Ento-A;湿热型溃疡性结肠炎;大鼠 |
KEYWORDS: | Periplaneta americana;Extract Ento-A;Damp-heat ulcerative colitis;Rat |
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