槟榔多糖对Caco-2细胞氧化损伤的保护作用
Protective effect of Areca catechu L.polysaccharide on Caco-2 cells oxidative injury
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摘要: 采用CCK-8法测定细胞的存活率、Annexin V-FITC/PI双染色法检测细胞凋亡率,利用蛋白质免疫印迹检测人结直肠腺癌细胞(Caco-2细胞)中抗凋亡蛋白Bcl-2、促凋亡蛋白Bax及细胞间紧密连接蛋白的表达情况,研究槟榔多糖对DMNQ诱发Caco-2细胞氧化损伤的保护作用。结果表明:槟榔多糖能显著抑制促凋亡蛋白Bax的表达并同时促进抗凋亡蛋白Bcl-2的表达,抑制DMNQ引起的细胞凋亡并减轻内质网应激,显著上调Caco-2细胞紧密连接蛋白ZO-1、Occludin 和Claudin 1的表达,维持细胞紧密连接的完整性,即槟榔多糖能显著改善DMNQ诱导的Caco-2细胞氧化损伤。Abstract: The cell viability of intestinal epithelial Caco-2 cell could be determined by CCK-8 assay, and cell survival and apoptosis detected by Annexin V-FITC/PI double-straining. The expressions of anti-apoptosis protein (Bcl-2), pro-apoptosis protein (Bax), and tight junction protein were determined by protein immunoblotting. This paper investigated the protective effects of Areca catechu L. polysaccharide (AP) on oxidative stress in Caco-2 cells. The results showed that AP could down-regulate the expression of Bax, up-regulate the expression of Bcl-2, and inhibit cell apoptosis caused by DMNQ, and improve endoplasmic stress, up-regulate the expression of Caco-2 tight junction protein Z0-1, Occludin and Claudin 1. AP also maintained the integrity of cells through improving the expression of tight junction protein. These results suggested that the AP could exhibit a protective effect to against DMNQ-induced oxidative stress in Caco-2 cells.
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Key words:
- Areca catechu L.polysaccharide /
- Caco-2 cell /
- cell oxidative injury
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