Vulnerable atherosclerotic plaque(VASPs)is the major pathological cause of acute cardiovascular event.Early detection and precise intervention of VASP hold great clinical significance,yet remain a major challenge.Phot...Vulnerable atherosclerotic plaque(VASPs)is the major pathological cause of acute cardiovascular event.Early detection and precise intervention of VASP hold great clinical significance,yet remain a major challenge.Photodynamic therapy(PDT)realizes potent ablation efficacy under precise manipulation of laser irradiation.In this study,we constructed theranostic nanoprobes(NPs),which could precisely regress VASPs through a cascade of synergistic events triggered by local irradiation of lasers under the guidance of fluorescence/MR imaging.The NPs were formulated from human serum albumin(HSA)conjugated with a high affinity-peptide targeting osteopontin(OPN)and encapsulated with photosensitizer IR780 and hypoxia-activatable tirapazamine(TPZ).After intravenous injection into atherosclerotic mice,the OPN-targeted NPs demonstrated high specific accumulation in VASPs due to the overexpression of OPN in activated foamy macrophages in the carotid artery.Under the visible guidance of fluorescence and MR dual-model imaging,the precise near-infrared(NIR)laser irradiation generated massive reactive oxygen species(ROS),which resulted in efficient plaque ablation and amplified hypoxia within VASPs.In response to the elevated hypoxia,the initially inactive TPZ was successively boosted to present potent biological suppression of foamy macrophages.After therapeutic administration of the NPs for 2 weeks,the plaque area and the degree of carotid artery stenosis were markedly reduced.Furthermore,the formulated NPs displayed excellent biocompatibility.In conclusion,the developed HSA-based NPs demonstrated appreciable specific identification ability of VASPs and realized precise synergistic regression of atherosclerosis.展开更多
【目的】观察解毒活血方干预经皮冠状动脉介入(PCI)术后患者外周血中核因子kappaB(NF-κB)、白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)的变化及支架内再狭窄(ISR)的发生情况,以期阐明解毒活血方防治ISR的远期疗效及机制。【方...【目的】观察解毒活血方干预经皮冠状动脉介入(PCI)术后患者外周血中核因子kappaB(NF-κB)、白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)的变化及支架内再狭窄(ISR)的发生情况,以期阐明解毒活血方防治ISR的远期疗效及机制。【方法】选择符合PCI术后纳入标准的患者40例,将PCI术后给予基础治疗者设为对照组,将PCI术后给予基础治疗+解毒活血方治疗者设为中药组,每组各20例。治疗结束后,观察2组临床疗效。于PCI术前及术后24 h、14 d,采用流式细胞仪检测2组患者外周血单个核细胞NF-κB活性,采用酶联免疫吸附法(ELISA)检测2组患者血浆IL-1β及TNF-α表达水平。观察患者术后6个月内心血管事件及ISR的发生情况。【结果】中药组患者的临床疗效显著优于对照组(P<0.05),证候积分及PCI术后6个月内心血管事件和ISR的发生率显著低于对照组(P<0.05或P<0.01)。2组患者PCI术后24 h NF-κB阳性表达率及TNF-α、IL-1β表达水平较治疗前显著升高(P<0.01),但2组差异无统计学意义(P>0.05);2组患者PCI术后14 d NF-κB阳性表达率及TNF-α、IL-1β表达水平较术后24 h显著降低(P<0.01),且中药组降低效果明显优于对照组(P<0.05)。【结论】解毒活血方可降低ISR的发生率,其机制可能与降低NF-κB活性及血浆IL-1β、TNF-α表达水平有关。展开更多
目的:观察雌激素及其受体调节剂对去势APOE基因敲除(APOE-/-)小鼠胸主动脉血管组织中NF-κB和MMP-9的影响。方法:44只APOE-/-小鼠喂养4周,确定动脉粥样硬化斑块形成后,将其随机分成模型组和5组不同给药组:生理盐水0.2 m L/d(模型组);戊...目的:观察雌激素及其受体调节剂对去势APOE基因敲除(APOE-/-)小鼠胸主动脉血管组织中NF-κB和MMP-9的影响。方法:44只APOE-/-小鼠喂养4周,确定动脉粥样硬化斑块形成后,将其随机分成模型组和5组不同给药组:生理盐水0.2 m L/d(模型组);戊酸雌二醇0.13 m L/d+地屈孕酮0.13 m L/d(HT组);ICI皮下注射0.13 m L/周+戊酸雌二醇0.13 m L/d(ICI+E2组);ICI皮下注射0.13 m L/周+戊酸雌二醇0.13 m L/d+地屈孕酮0.13 m L/d(ICI+HT组);戊酸雌二醇0.13 m L/d+PHTTP 0.13 m L/d(PHTTP+E2组);戊酸雌二醇0.13m L/d+地屈孕酮0.13 m L/d+PHTTP 0.13 m L/d(PHTTP+HT组)。8周后,获取动脉粥样硬化斑块的胸主动脉组织后行总RNA提取、逆转录,利用real-time PCR检测小鼠胸主动脉NF-κB和MMP-9的m RNA含量。结果:各组NF-κB m RNA的表达差异有统计学意义(P<0.05),而MMP-9 m RNA的表达差异无统计学意义(P>0.05)。与模型组相比,PHTTP+E2和PHTTP+HT组NF-κB表达显著升高(P=0.047和P=0.035),ICI+HT组NF-κB的表达明显低于PHTTP+HT组(P=0.028);模型组、HT组、ICI+E2组及ICI+HT组间NF-κB的表达差异不明显(与模型组相比,P分别为0.072,0.068和0.054)。结论:ERα介导的激素替代治疗(PHTTP+E2和PHTTP+HT)使NF-κB的表达升高,提示ERα可能对动脉粥样硬化斑块稳定性不利。展开更多
基金This work was supported by the National Nature Science Foundation of China(Nos.81820108019,91939303 and 31971302)the National Key Research and Development Program of China(2018YFC0116305)the Science Foundation of PLA General Hospital(2018XXFC-9,CX19028,China).
文摘Vulnerable atherosclerotic plaque(VASPs)is the major pathological cause of acute cardiovascular event.Early detection and precise intervention of VASP hold great clinical significance,yet remain a major challenge.Photodynamic therapy(PDT)realizes potent ablation efficacy under precise manipulation of laser irradiation.In this study,we constructed theranostic nanoprobes(NPs),which could precisely regress VASPs through a cascade of synergistic events triggered by local irradiation of lasers under the guidance of fluorescence/MR imaging.The NPs were formulated from human serum albumin(HSA)conjugated with a high affinity-peptide targeting osteopontin(OPN)and encapsulated with photosensitizer IR780 and hypoxia-activatable tirapazamine(TPZ).After intravenous injection into atherosclerotic mice,the OPN-targeted NPs demonstrated high specific accumulation in VASPs due to the overexpression of OPN in activated foamy macrophages in the carotid artery.Under the visible guidance of fluorescence and MR dual-model imaging,the precise near-infrared(NIR)laser irradiation generated massive reactive oxygen species(ROS),which resulted in efficient plaque ablation and amplified hypoxia within VASPs.In response to the elevated hypoxia,the initially inactive TPZ was successively boosted to present potent biological suppression of foamy macrophages.After therapeutic administration of the NPs for 2 weeks,the plaque area and the degree of carotid artery stenosis were markedly reduced.Furthermore,the formulated NPs displayed excellent biocompatibility.In conclusion,the developed HSA-based NPs demonstrated appreciable specific identification ability of VASPs and realized precise synergistic regression of atherosclerosis.
文摘【目的】观察解毒活血方干预经皮冠状动脉介入(PCI)术后患者外周血中核因子kappaB(NF-κB)、白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)的变化及支架内再狭窄(ISR)的发生情况,以期阐明解毒活血方防治ISR的远期疗效及机制。【方法】选择符合PCI术后纳入标准的患者40例,将PCI术后给予基础治疗者设为对照组,将PCI术后给予基础治疗+解毒活血方治疗者设为中药组,每组各20例。治疗结束后,观察2组临床疗效。于PCI术前及术后24 h、14 d,采用流式细胞仪检测2组患者外周血单个核细胞NF-κB活性,采用酶联免疫吸附法(ELISA)检测2组患者血浆IL-1β及TNF-α表达水平。观察患者术后6个月内心血管事件及ISR的发生情况。【结果】中药组患者的临床疗效显著优于对照组(P<0.05),证候积分及PCI术后6个月内心血管事件和ISR的发生率显著低于对照组(P<0.05或P<0.01)。2组患者PCI术后24 h NF-κB阳性表达率及TNF-α、IL-1β表达水平较治疗前显著升高(P<0.01),但2组差异无统计学意义(P>0.05);2组患者PCI术后14 d NF-κB阳性表达率及TNF-α、IL-1β表达水平较术后24 h显著降低(P<0.01),且中药组降低效果明显优于对照组(P<0.05)。【结论】解毒活血方可降低ISR的发生率,其机制可能与降低NF-κB活性及血浆IL-1β、TNF-α表达水平有关。
文摘目的:观察雌激素及其受体调节剂对去势APOE基因敲除(APOE-/-)小鼠胸主动脉血管组织中NF-κB和MMP-9的影响。方法:44只APOE-/-小鼠喂养4周,确定动脉粥样硬化斑块形成后,将其随机分成模型组和5组不同给药组:生理盐水0.2 m L/d(模型组);戊酸雌二醇0.13 m L/d+地屈孕酮0.13 m L/d(HT组);ICI皮下注射0.13 m L/周+戊酸雌二醇0.13 m L/d(ICI+E2组);ICI皮下注射0.13 m L/周+戊酸雌二醇0.13 m L/d+地屈孕酮0.13 m L/d(ICI+HT组);戊酸雌二醇0.13 m L/d+PHTTP 0.13 m L/d(PHTTP+E2组);戊酸雌二醇0.13m L/d+地屈孕酮0.13 m L/d+PHTTP 0.13 m L/d(PHTTP+HT组)。8周后,获取动脉粥样硬化斑块的胸主动脉组织后行总RNA提取、逆转录,利用real-time PCR检测小鼠胸主动脉NF-κB和MMP-9的m RNA含量。结果:各组NF-κB m RNA的表达差异有统计学意义(P<0.05),而MMP-9 m RNA的表达差异无统计学意义(P>0.05)。与模型组相比,PHTTP+E2和PHTTP+HT组NF-κB表达显著升高(P=0.047和P=0.035),ICI+HT组NF-κB的表达明显低于PHTTP+HT组(P=0.028);模型组、HT组、ICI+E2组及ICI+HT组间NF-κB的表达差异不明显(与模型组相比,P分别为0.072,0.068和0.054)。结论:ERα介导的激素替代治疗(PHTTP+E2和PHTTP+HT)使NF-κB的表达升高,提示ERα可能对动脉粥样硬化斑块稳定性不利。
