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幽门螺杆菌对大鼠胃上皮细胞环氧合酶-2表达的影响 被引量:2

Influences of Helicobacter pylori on cyclooxygenase-2 expression in rat gastric epithelial cells in vitro
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摘要 目的:探讨幽门螺杆菌(Hp)水提取物对大鼠胃上皮细胞环氧合酶-2(COX-2)表达及前列腺素E2(PGE2)合成的影响。方法:大鼠胃上皮细胞株RGM1体外常规培养,Hp组细胞培养液内Hp水提取物终浓度为2.5mg/L、5mg/L、10mg/L,大肠埃希菌组大肠埃希菌水提取物终浓度10mg/L。培养24h后收集细胞和上清液分别用于Western blotting分析COX-1、COX-2表达和酶免疫方法测定前列腺素E2(PGE2)含量。结果:Hp水提取物剂量依赖地增加RGM1细胞COX-2表达但不影响COX-1表达,而大肠埃希菌水提取物对COX-1和COX-2表达均无明显影响。RGM1细胞培养上清液中PGE2水平在Hp组(2.5、5、10mg/L)和大肠埃希菌组分别为(230.70±48.55)ng/g protein、(291.82±33.49)ng/g protein、(342.94±28.70)ng/g protein和(130.54±42.81)ng/g protein。结论:Hp体外诱导大鼠胃上皮细胞COX-2表达而增加PGE2合成,Hp感染的致癌机制可能与其诱导的COX-2表达有关。
出处 《中国病理生理杂志》 CAS CSCD 北大核心 2007年第3期595-597,共3页 Chinese Journal of Pathophysiology
基金 江苏省卫生厅"135工程"医学重点人才基金资助项目(No苏卫科教[2003]19号) 江苏省自然科学基金资助项目(NoBK2001186)
关键词 螺杆菌 幽门 环氧合酶-2 前列腺素E类 大鼠 Helicobacter pylori Cyclooxygenase - 2 Pmstaglandins E Rats Stomach
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