川芎嗪对大鼠腹腔巨噬细胞表达VEGF和HIF-1α的影响

目的：探讨川芎嗪对脂多糖（LPS）诱导的巨噬细胞分泌血管内皮生长因子（VEGF）和表达缺氧诱导因子-1α（HIF-1α）的影响。 方法: 原代培养大鼠腹腔巨噬细胞,给予脂多糖（LPS）刺激并加入不同浓度的川芎嗪共同培养。ELISA方法检测细胞培养液中VEGF的含量,MTT法观察巨噬细胞增殖情况。western blot检测巨噬细胞HIF-1α的表达。结果: 480,48 μmol·L^-1川芎嗪可抑制LPS诱导的大鼠腹腔巨噬细胞分泌VEGF,并抑制巨噬细胞表达HIF-1α,但对巨噬细胞增殖没有影响。 结论: 川芎嗪可抑制大鼠腹腔巨噬细胞分泌血管内皮生长因子,其机制与抑制巨噬细胞表达HIF-1α密切相关。这种作用不依赖于抑制巨噬细胞的增殖。

Effects of tetramethylpyrazine on expression of vascular endothelial growth factor and hypoxia-induced factor-1α by rat peritoneal macrophages

OBJECTIVE: To investigate the effects of tetramethylpyrazine on lipopolysaccharides (LPS)-induced expression of vascular endothelial growth factor (VEGF) and hypoxia-induced factor-1alpha (HIF-1alpha) in macrophages. METHOD: Rat peritoneal macrophages were treated with LPS, and at the same time given different doses of tetramethylpyrazine. The secreation of VEGF was determined by ELISA test, and MTT assay was used to examine cells proliferation. Western blot assay was used to examine the expression of HIF-1alpha. RESULT: 100 microg x mL(-1) and 10 microg x mL(-1) tetramethylpyrazine decreased the secretion of VEGF and also inhibited the expression of HIF-1alpha by LPS-induced macrophages. But these doses of tetramethylpyrazine had no effect on the cells proliferation. CONCLUSION: Tetramethylpyrazine could inhibit the secretion of VEGF by LPS-induced macrophages, and the mechanism must be associated with inhibiting the expression of HIF-1alpha. The inhibition effect was not due to inhibition of the proliferation of macrophages.