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烟酸姜黄素酯促进血管平滑肌细胞向收缩型转化 被引量:2
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作者 孙少卫 杨春芬 童文娟 《中国动脉硬化杂志》 CAS 2019年第3期197-203,共7页
目的研究烟酸姜黄素酯(CurTn)调节血管收缩性的机制及其对血管平滑肌细胞(VSMC)表型调节的影响。方法将C57BL/6小鼠用50 mg/(kg·d) CurTn灌胃,连续给药6周后取小鼠胸主动脉,用Myography肌动描记仪记录血管收缩力,并检测血管组织中... 目的研究烟酸姜黄素酯(CurTn)调节血管收缩性的机制及其对血管平滑肌细胞(VSMC)表型调节的影响。方法将C57BL/6小鼠用50 mg/(kg·d) CurTn灌胃,连续给药6周后取小鼠胸主动脉,用Myography肌动描记仪记录血管收缩力,并检测血管组织中收缩蛋白的水平。将VSMC用10μmol/L CurTn孵育24 h,Western blot检测VSMC表型相关因子的表达;噻唑蓝法和划痕试验分别观察VSMC的增殖、迁移情况;油红O染色和高效液相色谱分析VSMC对低密度脂蛋白(LDL)的吞噬能力。结果 CurTn灌胃处理的小鼠胸主动脉血管的收缩力增强,且血管平滑肌组织中收缩蛋白的表达增加。CurTn增加VSMC中Myocardin及收缩型特异标志蛋白α-actin和SM22α的表达,同时下调增殖型特异标志物骨桥蛋白的水平。此外,CurTn阻止了VSMC的增殖、迁移及对LDL的吞噬作用。结论 CurTn能增强血管收缩力,其机制可能是通过促进VSMC的收缩表型而阻止其增殖表型来实现的。 展开更多
关键词 烟酸姜黄素酯 血管平滑肌细胞 细胞表型 血管收缩力
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TCD study of hemodynamic changes in PCA response to photic stimulation
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作者 郑旭宁 朱雄超 +2 位作者 徐秋芳 黄一宁 柳扬 《Journal of Zhejiang University Science》 CSCD 2003年第2期228-231,共4页
Objectives: During visual stimulation, the elevated metabolism rate will coupl e with increase of blood flow velocity(BFV) in posterior cerebral artery(PCA). T his study with TCD was aimed to investigate whether the c... Objectives: During visual stimulation, the elevated metabolism rate will coupl e with increase of blood flow velocity(BFV) in posterior cerebral artery(PCA). T his study with TCD was aimed to investigate whether the coupling might change ac cording to the different vasoneuronal conditions. Methods: Ninety-nine voluntee r s including 24 hypertension(HT) patients and 2 patients suffering from both HT a nd diabetes mellitus(DM) were enrolled in this trial. BFV and pulse indexes(PI) in P2 segments of PCA on both sides were monitored during visual stimulation. Re sults: In all subjects, Mean BFV increased and PI went down in response to visua l stimulation. The percentages of changes (ΔV and ΔP) of both mean BFV and PI we re larger in young group(<55 years old) than in old one(≥55 years old). There w a s significant positive correlation between ΔV and ΔP. Multivariated re gression a nalysis did not show HT and DM, but age related to ΔV(ΔP). We did not find signi ficant difference of ΔV(ΔP) between left and right sides. Conclusions: Blood flo w velocity in PCA P2 segment increased due to decreased cerebrovascular resistan ce during visual stimulation and the response weakened with aging of the patient . 展开更多
关键词 Cerebral blood flow ULTRASONOGRAPHY Vasomotor react ivity TCD(Transcranial Doppler)
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