【摘要】 目的 :研究probucol对bFGF和H2 O2 促大鼠血管平滑肌细胞 (VSMC)增殖的影响。方法 :采用MTT、细胞计数和 [3H]-TdR掺入法观察probucol对bFGF和H2 O2 促VSMC增殖的影响。结果 :①Probucol抑制bFGF和H2 O2 刺激VSMC增殖和DNA合成 ,且呈剂量依赖性。Probucol+bFGF和probucol+H2 O2 组与bFGF和H2 O2 组比较 ,细胞计数、A值和 [3H]-TdR掺入量分别下降了 40 0 %、39 1%、45 5 %和 46 9%、45 0 %、39 5 % (P <0 0 5 ,P <0 0 1)。②bFGF和H2 O2 刺激前给予probucol预处理 2 4h能显著抑制VSMC增殖和DNA合成 (P <0 0 5 ) ,而bFGF和H2 O2 刺激后 2 4h给予probucol则无明显影响 (P >0 0 5 )。结论 :Probucol能显著抑制bFGF和H2 O2 刺激的VSMC增殖和DNA合成 ,但对bFGF和H2 O2 预刺激诱导的细胞增殖无抑制作用。更多还原

【Abstract】 AIM: To investigate the effect of probucol on proliferation of rat vascular smooth muscle cells(VSMC) stimulated by basic fibroblast growth factor (bFGF) and/or hydrogen peroxide(H 2O 2). METHODS: Effects of probucol on VSMC proliferation and DNA synthesis stimulated by bFGF and/or H 2O 2 were observed by means of MTT test, cell number count and [ 3H]-TdR incorporation. RESULTS: ①Probucol significantly inhibited proliferation and DNA synthesis in VSMC stimulated by bFGF and/or H 2O 2, with dosage-dependent manner. Cell number, A value and [ 3H]-TdR incorporation in group probucol+bFGF and group probucol+H 2O 2 were reduced by 40.0%, 39.1%, 45 5% and 46 9%, 45 0%, 39 5%, respectively, compared with group bFGF and group H 2O 2 ( P< 0 05, P< 0 01, respectively). ②Pretreatment of VSMC with probucol for 24 h prior to bFGF and/or H 2O 2 stimulation exhibited significant inhibiton of VSMC proliferation and DNA synthesis, but after prestimulation by bFGF and/or H 2O 2 for 24 h, probucol had no influence on VSMC proliferation and DNA synthesis ( P> 0.05). CONCLUSION: Probucol dramatically inhibited proliferation and DNA synthesis in VSMC stimulated by bFGF and/or H 2O 2, but had no inhibitory effect on the cell proliferation prestimulated by bFGF and /or H 2O 2. [更多还原