目的探索丹酚酸A抗四氯化碳(CCl_4)诱导的大鼠肝纤维化的防治及作用机制。方法将48只SD大鼠随机分为空白对照组、CCl_4模型组、丹酚酸A低剂量给药组和丹酚酸A高剂量给药组。除空白对照组外,其他3组每周2次给予50%CCl_4/花生油溶液(1 m L...目的探索丹酚酸A抗四氯化碳(CCl_4)诱导的大鼠肝纤维化的防治及作用机制。方法将48只SD大鼠随机分为空白对照组、CCl_4模型组、丹酚酸A低剂量给药组和丹酚酸A高剂量给药组。除空白对照组外,其他3组每周2次给予50%CCl_4/花生油溶液(1 m L·kg-1)灌胃诱导建立肝纤维化模型,丹酚酸A低剂量和高剂量给药组大鼠同时每日1次给予腹腔注射丹酚酸A(分别为5 mg·kg-1与15 mg·kg-1)。6周后处死大鼠,HE和Masson染色法进行肝组织病理学观察;全自动生化分析仪检测血清肝功能指标(谷丙转氨酶及谷草转氨酶);放射免疫法测定血清肝纤维化指标(透明质酸、Ⅳ型胶原、层黏蛋白和Ⅲ型前胶原肽);Western blot检测肝脏组织中NF-κB和IκBα蛋白的表达;Q-PCR检测炎症因子以及肝星状细胞激活因子基因水平的表达。结果与CCl_4模型组相比,丹酚酸A给药组能够显著改善大鼠肝功能,降低大鼠肝纤维化程度(P<0.05)。与此同时,丹酚酸A给药组能够提高肝细胞浆中NF-κB、IκBα蛋白的表达,并降低细胞核NF-κB蛋白的表达,且能够抑制炎症因子与肝星状细胞激活因子基因水平的表达。结论丹酚酸A可通过调节NF-κB/IκBα信号通路发挥抗肝纤维化作用。展开更多
目的探讨舒血宁注射液对大鼠肝纤维化的防治作用及NF-κB/IκBα信号通路影响的研究。方法将SD大鼠随机分为正常对照组(简称对照组)、肝纤维化模型组(简称模型组)、舒血宁注射液给药组(简称给药组),每组12只。每周2次50%CCl4花生油溶液(...目的探讨舒血宁注射液对大鼠肝纤维化的防治作用及NF-κB/IκBα信号通路影响的研究。方法将SD大鼠随机分为正常对照组(简称对照组)、肝纤维化模型组(简称模型组)、舒血宁注射液给药组(简称给药组),每组12只。每周2次50%CCl4花生油溶液(1 m L·kg-1)灌胃6周建立大鼠肝纤维化模型。同时,给药组每日一次腹腔注射舒血宁注射液15 mg·kg-1。观察大鼠的生活状况、肝脏大体形态;HE染色检测大鼠肝脏病理学的变化;全自动生化分析仪检测血清谷丙转氨酶(ALT)及谷草转氨酶(AST);放射免疫法检测血清透明质酸(HA)、IV型胶原(CIV)、层黏蛋白(LN)和Ⅲ型前胶原肽(PⅢP);Western blot检测肝脏组织细胞核中NF-κB和细胞质中NF-κB、IκBα蛋白的表达。结果舒血宁注射液治疗后大鼠肝功能指标有明显下降,血清肝纤维化指标有显著降低,并且大鼠肝脏病理组织学结构有明显改善(P<0.05)。与模型组相比,舒血宁注射液能够上调肝组织细胞质中NF-κB和IκBα蛋白的表达,下调细胞核中NF-κB蛋白的表达(P<0.05)。结论舒血宁注射液可通过抑制NF-κB/IκBα信号通路发挥抗肝纤维化的作用。展开更多
The M1/M2 phenotypic shift of microglia after spinal cord injury plays an important role in the regulation of neuroinflammation during the secondary injury phase of spinal cord injury.Regulation of shifting microglia ...The M1/M2 phenotypic shift of microglia after spinal cord injury plays an important role in the regulation of neuroinflammation during the secondary injury phase of spinal cord injury.Regulation of shifting microglia polarization from M1(neurotoxic and proinflammatory type)to M2(neuroprotective and anti-inflammatory type)after spinal cord injury appears to be crucial.Tryptanthrin possesses an anti-inflammatory biological function.However,its roles and the underlying molecular mechanisms in spinal cord injury remain unknown.In this study,we found that tryptanthrin inhibited microglia-derived inflammation by promoting polarization to the M2 phenotype in vitro.Tryptanthrin promoted M2 polarization through inactivating the cGAS/STING/NF-κB pathway.Additionally,we found that targeting the cGAS/STING/NF-κB pathway with tryptanthrin shifted microglia from the M1 to M2 phenotype after spinal cord injury,inhibited neuronal loss,and promoted tissue repair and functional recovery in a mouse model of spinal cord injury.Finally,using a conditional co-culture system,we found that microglia treated with tryptanthrin suppressed endoplasmic reticulum stress-related neuronal apoptosis.Taken together,these results suggest that by targeting the cGAS/STING/NF-κB axis,tryptanthrin attenuates microglia-derived neuroinflammation and promotes functional recovery after spinal cord injury through shifting microglia polarization to the M2 phenotype.展开更多
文摘目的探讨舒血宁注射液对大鼠肝纤维化的防治作用及NF-κB/IκBα信号通路影响的研究。方法将SD大鼠随机分为正常对照组(简称对照组)、肝纤维化模型组(简称模型组)、舒血宁注射液给药组(简称给药组),每组12只。每周2次50%CCl4花生油溶液(1 m L·kg-1)灌胃6周建立大鼠肝纤维化模型。同时,给药组每日一次腹腔注射舒血宁注射液15 mg·kg-1。观察大鼠的生活状况、肝脏大体形态;HE染色检测大鼠肝脏病理学的变化;全自动生化分析仪检测血清谷丙转氨酶(ALT)及谷草转氨酶(AST);放射免疫法检测血清透明质酸(HA)、IV型胶原(CIV)、层黏蛋白(LN)和Ⅲ型前胶原肽(PⅢP);Western blot检测肝脏组织细胞核中NF-κB和细胞质中NF-κB、IκBα蛋白的表达。结果舒血宁注射液治疗后大鼠肝功能指标有明显下降,血清肝纤维化指标有显著降低,并且大鼠肝脏病理组织学结构有明显改善(P<0.05)。与模型组相比,舒血宁注射液能够上调肝组织细胞质中NF-κB和IκBα蛋白的表达,下调细胞核中NF-κB蛋白的表达(P<0.05)。结论舒血宁注射液可通过抑制NF-κB/IκBα信号通路发挥抗肝纤维化的作用。
基金supported by the National Natural Science Foundation of China,Nos.82071387(to HT),81971172(to YW)the Natural Science Foundation of Zhejiang Province,China,No.LY22H090012(to HT)the Basic Research Project of Wenzhou City,China,No.Y20220923(to MZ)。
文摘The M1/M2 phenotypic shift of microglia after spinal cord injury plays an important role in the regulation of neuroinflammation during the secondary injury phase of spinal cord injury.Regulation of shifting microglia polarization from M1(neurotoxic and proinflammatory type)to M2(neuroprotective and anti-inflammatory type)after spinal cord injury appears to be crucial.Tryptanthrin possesses an anti-inflammatory biological function.However,its roles and the underlying molecular mechanisms in spinal cord injury remain unknown.In this study,we found that tryptanthrin inhibited microglia-derived inflammation by promoting polarization to the M2 phenotype in vitro.Tryptanthrin promoted M2 polarization through inactivating the cGAS/STING/NF-κB pathway.Additionally,we found that targeting the cGAS/STING/NF-κB pathway with tryptanthrin shifted microglia from the M1 to M2 phenotype after spinal cord injury,inhibited neuronal loss,and promoted tissue repair and functional recovery in a mouse model of spinal cord injury.Finally,using a conditional co-culture system,we found that microglia treated with tryptanthrin suppressed endoplasmic reticulum stress-related neuronal apoptosis.Taken together,these results suggest that by targeting the cGAS/STING/NF-κB axis,tryptanthrin attenuates microglia-derived neuroinflammation and promotes functional recovery after spinal cord injury through shifting microglia polarization to the M2 phenotype.