本文關鍵詞： 熱打擊 谷氨酰胺 腸黏膜　出處：《解放軍醫(yī)學雜志》2017年06期 　論文類型：期刊論文

【摘要】：目的探討谷氨酰胺(Gln)對熱打擊后腸黏膜單層上皮細胞屏障通透性改變的影響及可能機制。方法應用Caco-2細胞株建立腸上皮機械屏障模型,加入Gln培養(yǎng)24h,43℃持續(xù)1h熱打擊。以CCK-8法檢測不同濃度Gln(0.4、0.7、1.4、2.1、2.8mmol/L)對細胞增殖的影響,為后續(xù)實驗選擇最適合濃度;Transwell法測定單層跨膜電阻抗(TEER)值和對辣根過氧化物酶(HRP)的通透性;Western blotting檢測緊密連接蛋白occludin和ZO-1的表達;采用考馬斯亮藍對細胞骨架進行染色觀察。結果 0.7mmol/L的Gln促進細胞增殖的效果最強,與其他濃度相比,差異均有統(tǒng)計學意義(P0.05)。相較于單純43℃熱打擊組,0.7mmol/L的Gln可抑制單層上皮細胞TEER的下降和HRP通過率的升高(P0.01),增加occludin和ZO-1的表達,有益于維持細胞骨架的正常結構。結論 0.7mmol/L的Gln可減輕熱打擊對單層腸上皮細胞結構的破壞,保護屏障功能。
[Abstract]:Objective to investigate the effect of glutamine (Glutamine) on the permeability of intestinal mucosal monolayer epithelial cell barrier after thermal shock and its possible mechanism. Methods Caco-2 cell line was used to establish the model of intestinal epithelial mechanical barrier. The effects of different concentrations of Glnn on cell proliferation were detected by CCK-8 assay. The effects of different concentrations of Glnn on cell proliferation were measured by CCK-8 assay at 43 鈩，

本文編號：1552282