硫化氢对幽门螺杆菌感染GES-1细胞CSE,NF-κB及IL-8 mRNA表达的影响

目的: 观察硫化氢(hydrogen sulfide,H₂S)对幽门螺杆菌(H. pylori)感染的GES-1细胞CSE,NF-κB及IL-8 mRNA表达及其形态学的影响,探讨其对H. pylori所致胃黏膜细胞炎症的作用及机制。方法: 将GES-1细胞培养24 h后分为对照组(不加H. pylori及NaHS)、H. pylori组、NaHS组(又分为4个亚组,分别加入 50,100,200或400 μmol/L NaHS)和H. pylori+NaHS组(又分为4个亚组,分别加入H. pylori与50,100,200或400 μmol/L NaHS),每组分别培养3,6,及12 h,用RT-PCR法检测各组GES-1细胞CSE,NF-κB 及IL-8 mRNA表达,并分析其相关性。结果: H. pylori组CSE,NF-κB及IL-8 mRNA表达均较对照组增加(P<0.05),200 μmol/L NaHS组和400 μmol/L NaHS组CSE表达较对照组降低(P<0.05);而NaHS各组NF-κB和IL-8 mRNA表达与对照组比较差异无统计学意义(P>0.05);NaHS各组、H. pylori+200 μmol/L NaHS组及H. pylori+400 μmol/L NaHS组CSE,NF-κB及IL-8 mRNA表达均较H. pylori组降低(P<0.05);H. pylori组、H. pylori+200 μmol/L NaHS组及H. pylori+400 μmol/L NaHS组CSE,NF-κB及IL-8 mRNA表达之间均呈正相关(P<0.05)。结论: H. pylori诱导GES-1细胞NF-κB和IL-8 mRNA表达,并上调CSE mRNA表达;200和400 μmol/L NaHS能抑制H. pylori感染诱导的GES-1细胞NF-κB和IL-8 mRNA表达,改善H. pylori感染所致的细胞形态学变化,对细胞起保护作用。

Effect of hydrogen sulfide on the expression of CSE,NF-κB,and IL-8 mRNA in GES-1 cells with Helicobacter pylori infection

Objective: To investigate the effect of hydrogen sulfide (H₂S) on the expression of CSE, NF-κB, and IL-8 mRNA in GES-1 cells with Helicobacter pylori (H. pylori) infection and to explore its mechanism on gastric mucosa inflammation caused by H. pylori.
Methods: GES-1 cells were cultured for 24 h and divided into a control group (neither H. pylori nor NaHS), an H. pylori group, a NaHS group (which was further divided into 4 groups at 50, 100, 200, or 400 μmol/L NaHS), and H. pylori+NaHS group (which was further divided into 4 groups at 50, 100, 200, or 400 μmol/L NaHS). Each group was then cultured for 3, 6, or 12 h. The expression of CSE, NF-κB, and IL-8 mRNA was measured by RT-PCR, and their correlation was analyzed.
Results: The expression of CSE, NF-κB, and IL-8 mRNA in GES-1 cells in the H. pylori group was higher than that in the control group. The expression of CSE in the 200 μmol/L NaHS group and 400 μmol/L NaHS group was lower than that of the control group (P<0.05), whereas the expression of NF-κB and IL-8 in all NaHS groups had no statistical differences compared with the control group (P>0.05). The expression of CSE, NF-κB, and IL-8 mRNA in all groups of NaHS, H. pylori+200 μmol/L NaHS group, and H. pylori+400 μmol/L NaHS group was lower than that in the H. pylori group (P<0.05). There was positive correlation among the expressions of CSE, NF-κB, and IL-8 mRNA in the H. pylori group, the H. pylori+200 μmol/L NaHS group, and the H. pylori+400 μmol/L NaHS group (P<0.05).
Conclusion: H. pylori can induce NF-κB and IL-8 mRNA expression and upregulate CSE mRNA expression. At 200 and 400 μmol/L, NaHS can suppress H. pylori-induced NF-κB and IL-8 mRNA expression and ameliorate the morphology of H. pylori-induced GES-1 injury, which may protect gastric epithelial cells by H. pylori infection.