同型半胱氨酸对滋养细胞基质金属蛋白酶2、9表达的影响

目的探讨同型半胱氨酸（Hcy）对早孕期滋养细胞基质金属蛋白酶（MMP）2、9表达的影响及其在子病前期发病过程中的作用。方法分离培养早孕期滋养细胞,用Hcy刺激早孕期滋养细胞48h,对照组Hcy刺激浓度为0mmol／L,实验组的刺激浓度为1mmol／L;以实时荧光定量RT-PCR检测早孕期滋养细胞MMP-2、MMP-9mRNA的表达变化;明胶酶谱分析法测定早孕期滋养细胞MMP-2、MMP-9酶活性变化,以积分吸光度值表示。结果实验组与对照组比较,早孕期滋养细胞MMP-2mRNA表达降低21％,MMP-9mRNA表达降低11％;实验组与对照组比较,MMP-2蛋白表达降低14％,MMP-9蛋白表达降低52％。结论Hey能够抑制早孕期滋养细胞MMP02、MMP-9的表达,从而影响滋养细胞侵袭性。

Homocysteine decreases the invasion in cultured human trophoblasts: relationship between homocysteine and matrix metalloproteinase-2, -9 expression

OBJECTIVE: To test the hypothesis that homocysteine can decrease MMP-2 and MMP-9 expression in cultured trophoblasts of early pregnancy and that homocysteine can prevent trophoblasts invasion in the early stage of preeclampsia. METHODS: Cytotrophoblasts from early pregnancy were isolated and cultured. Trophoblasts were treated with or without Hcy (1 mmol/L) for 48 hour, and real time RT-PCR and gelatin zymography were used to quantify the mRNA and protease activity of MMP-2, -9. RESULTS: Treatment with Hcy (1 mmol/L) induced a decrease in MMP-2 mRNA by 21% and MMP-9 mRNA by 11%. At protein level MMP-2 expression decreased 14% and MMP-9 expression decreased 52% compared with control. CONCLUSIONS: Homocysteine can decrease MMP-2, -9 expression in trophoblasts of early pregnancy and influence its invasion process.