目的 研究稳斑护脉颗粒稳定动脉粥样硬化斑块的分子机制,观察其对动脉粥样斑块纤维帽中胶原纤维降解与合成失衡状态的影响。方法 采用高脂饮食的家兔动脉粥样硬化模型,以免疫组织化学染色、原位杂交方法,检测造模前后和服药前后动脉粥...目的 研究稳斑护脉颗粒稳定动脉粥样硬化斑块的分子机制,观察其对动脉粥样斑块纤维帽中胶原纤维降解与合成失衡状态的影响。方法 采用高脂饮食的家兔动脉粥样硬化模型,以免疫组织化学染色、原位杂交方法,检测造模前后和服药前后动脉粥样硬化家免新生内膜中巨噬细胞CD68、基质金属蛋白酶-1(MMP-1)、平滑肌细胞α肌动蛋白(SMC-α-actin)和Ⅰ型胶原(Collagen Type Ⅰ)蛋白、mRNA表达水平的变化。结果 家兔高脂饮食7周后,主动脉新生内膜中巨噬细胞CD68蛋白、MMP-1蛋白和mRNA表达水平显著上升,同时,主动脉中膜的平滑肌细胞迁移至新生内膜导致新生内膜中的SMC-α-actin蛋白、CollagenType Ⅰ蛋白和mRNA水平略有上升。服用稳斑护脉颗粒和辛伐他汀8周后,家兔主动脉新生内膜中巨噬细胞CD68蛋白、MMP-1蛋白和mRNA表达水平明显回落(P<0.01),同时,稳斑护脉颗粒组新生内膜中SMC-α-actin蛋白、Collagen Type Ⅰ蛋白和mRNA表达进一步增加(P<0.01),而辛伐他汀组家兔主动脉新生内膜中SMC-α-actin蛋白、Collagen Type Ⅰ蛋白和mRNA表达呈下降趋势(分别P>0.05,P<0.05),整个过程中,家兔主动脉新生内膜巨噬细胞CD68和MMP-1蛋白表达以及SMC-α-actin和Collagen Type Ⅰ蛋白表达的变化均呈正相关(分别为r=0.952,P<0.01;r=0.展开更多
The rupture of atherosclerosis(AS)vulnerable plaque is the major cause of fatal arterial thrombosis related diseases.The lipid dysbolism and pro-inflammatory microenvironment are considered two main driving factors fo...The rupture of atherosclerosis(AS)vulnerable plaque is the major cause of fatal arterial thrombosis related diseases.The lipid dysbolism and pro-inflammatory microenvironment are considered two main driving factors for plaque rupture.Herein,a“two-pronged”nanosystem LCS-Se/Res was designed to efficiently stabilize AS plaques,by precisely regulating lipid metabolism and inflammatory microenvironment.LCS-Se/Res was constructed with the core of resveratrol(Res)loaded selenium(Se)nanoparticles(NPs),and the shell(LCS)of targeting peptide(LSIPPKA)modified chitosan(CS).This system was stable in blood circulation.When it arrived at the plaque site,LCS-Se/Res could actively recognize the highly expressed lectin-like oxidized low-density lipoprotein receptor 1(LOX-1)receptor and accumulate there.Thereafter,Res was released from LCS-Se nanocarriers in situ by responding to acidic plaque microenvironment.On the one hand,Res increased autophagy flux in damaged endothelial cells by activating cAMP-PKA-AMPK-SIRT1 signaling pathway to promote lipid degradation.Interestingly,LCS-Se also promoted cholesterol efflux to improve lipid metabolism.On the other hand,fixed-point separated Res and LCS-Se synergistically improved plaque inflammatory microenvironment by reversing macrophage phenotype(M1 to M2)and alleviating plaque oxidative stress.Pharmacodynamics result proved that the plaque vulnerability index(VI)decreased from 1.39±0.282 to 0.108±0.02 after LCS-Se/Res treatment.In short,this study provided a new therapeutic strategy for the atherosclerosis through the two-pronged approach.展开更多
Vascular atherosclerotic vulnerable plaque rupture is the primary cause of acute myocardial infarctions and strokes. Thus, stabilization of vulnerable plaques is of important clinical endeavor to decrease the fatal ri...Vascular atherosclerotic vulnerable plaque rupture is the primary cause of acute myocardial infarctions and strokes. Thus, stabilization of vulnerable plaques is of important clinical endeavor to decrease the fatal risk of atherosclerosis. Inflammatory infiltration, apoptosis of endothelial cells (ECs) and vascular smooth muscle cells (VSMCs), destruction of extracellular matrix (ECM) or collagen, and neovascularization all contribute to the formation and stability of plaque. Let-7g, one miRNA of let-7 family, is related to retardation of the progress of vulnerable atherosclerosis plaque. First of all, let-7g induced preservation on vascular diseases through regulating on the intracellular Ca2+- activated protein kinase C-oxLDL-LOX-1 pathway, which resulted in reduced leukocyte adhesion to and migration across endothelium. Over expression of let-7g negatively regulated apoptosis in the ECs by targeting lectin-like oxidized LDL receptor-1(LOX-1)/CASP3 expression, therefore made the fibrous cap of plaque integrated and thick, increased the density of vascular atherosclerotic plaque. In addition, let-7g might stabilize the atherosclerotic plaque through other aspects. In this review, we focus on current and potential importance of let-7g on the stabilization of atherosclerosis plaque which might lead to the future development of an alternative strategy of CAD.展开更多
文摘目的 研究稳斑护脉颗粒稳定动脉粥样硬化斑块的分子机制,观察其对动脉粥样斑块纤维帽中胶原纤维降解与合成失衡状态的影响。方法 采用高脂饮食的家兔动脉粥样硬化模型,以免疫组织化学染色、原位杂交方法,检测造模前后和服药前后动脉粥样硬化家免新生内膜中巨噬细胞CD68、基质金属蛋白酶-1(MMP-1)、平滑肌细胞α肌动蛋白(SMC-α-actin)和Ⅰ型胶原(Collagen Type Ⅰ)蛋白、mRNA表达水平的变化。结果 家兔高脂饮食7周后,主动脉新生内膜中巨噬细胞CD68蛋白、MMP-1蛋白和mRNA表达水平显著上升,同时,主动脉中膜的平滑肌细胞迁移至新生内膜导致新生内膜中的SMC-α-actin蛋白、CollagenType Ⅰ蛋白和mRNA水平略有上升。服用稳斑护脉颗粒和辛伐他汀8周后,家兔主动脉新生内膜中巨噬细胞CD68蛋白、MMP-1蛋白和mRNA表达水平明显回落(P<0.01),同时,稳斑护脉颗粒组新生内膜中SMC-α-actin蛋白、Collagen Type Ⅰ蛋白和mRNA表达进一步增加(P<0.01),而辛伐他汀组家兔主动脉新生内膜中SMC-α-actin蛋白、Collagen Type Ⅰ蛋白和mRNA表达呈下降趋势(分别P>0.05,P<0.05),整个过程中,家兔主动脉新生内膜巨噬细胞CD68和MMP-1蛋白表达以及SMC-α-actin和Collagen Type Ⅰ蛋白表达的变化均呈正相关(分别为r=0.952,P<0.01;r=0.
基金supported by the National Natural Science Foundation of China(No.82102918).
文摘The rupture of atherosclerosis(AS)vulnerable plaque is the major cause of fatal arterial thrombosis related diseases.The lipid dysbolism and pro-inflammatory microenvironment are considered two main driving factors for plaque rupture.Herein,a“two-pronged”nanosystem LCS-Se/Res was designed to efficiently stabilize AS plaques,by precisely regulating lipid metabolism and inflammatory microenvironment.LCS-Se/Res was constructed with the core of resveratrol(Res)loaded selenium(Se)nanoparticles(NPs),and the shell(LCS)of targeting peptide(LSIPPKA)modified chitosan(CS).This system was stable in blood circulation.When it arrived at the plaque site,LCS-Se/Res could actively recognize the highly expressed lectin-like oxidized low-density lipoprotein receptor 1(LOX-1)receptor and accumulate there.Thereafter,Res was released from LCS-Se nanocarriers in situ by responding to acidic plaque microenvironment.On the one hand,Res increased autophagy flux in damaged endothelial cells by activating cAMP-PKA-AMPK-SIRT1 signaling pathway to promote lipid degradation.Interestingly,LCS-Se also promoted cholesterol efflux to improve lipid metabolism.On the other hand,fixed-point separated Res and LCS-Se synergistically improved plaque inflammatory microenvironment by reversing macrophage phenotype(M1 to M2)and alleviating plaque oxidative stress.Pharmacodynamics result proved that the plaque vulnerability index(VI)decreased from 1.39±0.282 to 0.108±0.02 after LCS-Se/Res treatment.In short,this study provided a new therapeutic strategy for the atherosclerosis through the two-pronged approach.
文摘Vascular atherosclerotic vulnerable plaque rupture is the primary cause of acute myocardial infarctions and strokes. Thus, stabilization of vulnerable plaques is of important clinical endeavor to decrease the fatal risk of atherosclerosis. Inflammatory infiltration, apoptosis of endothelial cells (ECs) and vascular smooth muscle cells (VSMCs), destruction of extracellular matrix (ECM) or collagen, and neovascularization all contribute to the formation and stability of plaque. Let-7g, one miRNA of let-7 family, is related to retardation of the progress of vulnerable atherosclerosis plaque. First of all, let-7g induced preservation on vascular diseases through regulating on the intracellular Ca2+- activated protein kinase C-oxLDL-LOX-1 pathway, which resulted in reduced leukocyte adhesion to and migration across endothelium. Over expression of let-7g negatively regulated apoptosis in the ECs by targeting lectin-like oxidized LDL receptor-1(LOX-1)/CASP3 expression, therefore made the fibrous cap of plaque integrated and thick, increased the density of vascular atherosclerotic plaque. In addition, let-7g might stabilize the atherosclerotic plaque through other aspects. In this review, we focus on current and potential importance of let-7g on the stabilization of atherosclerosis plaque which might lead to the future development of an alternative strategy of CAD.
