背景:氧化应激在股骨头坏死损伤中发挥重要作用,富血小板血浆富含生长因子,可以加快骨折愈合,配合髓芯减压术能促进非创伤性股骨头坏死的恢复。目的:探讨富血小板血浆联合髓芯减压术能否通过Keap1/Nrf2/HO-1信号通路抑制兔激素性股骨头...背景:氧化应激在股骨头坏死损伤中发挥重要作用,富血小板血浆富含生长因子,可以加快骨折愈合,配合髓芯减压术能促进非创伤性股骨头坏死的恢复。目的:探讨富血小板血浆联合髓芯减压术能否通过Keap1/Nrf2/HO-1信号通路抑制兔激素性股骨头坏死模型氧化应激反应。方法:将40只实验新西兰兔随机分为正常组、模型组、对照组和富血小板血浆组,每组10只。除正常组外其他3组兔在无菌环境下建立激素性股骨头坏死模型,术后4周向富血小板血浆组动物股骨头内髓芯减压后注射植入0.4 mL 3%的富血小板血浆,对照组兔只进行髓芯减压术治疗,对照组与模型组兔正常饲养。14周后苏木精-伊红染色观察各组兔股骨头骨髓腔内病理学变化和骨陷窝空缺率,检测各组兔血清中总抗氧化能力、超氧化物歧化酶、谷胱甘肽过氧化物酶、还原型谷胱甘肽及丙二醛等氧化应激指标活性,TUNEL检测股骨头组织内骨细胞凋亡情况,免疫荧光检测股骨头组织内Keap1、Nrf2分布,Western Blot检测股骨头组织内Keap1、Nrf2、HO-1蛋白表达。实验方案经青海大学附属医院动物实验伦理委员会批准(批准号为qhdx-201908374)。结果与结论:①与正常组相比,模型组骨组织内骨小梁变细,结构紊乱;对照组较模型组有所改善,骨小梁结构得到恢复,空骨陷窝减少(P<0.05),富血小板血浆组经富血小板血浆联合髓芯减压治疗较对照组得到进一步改善,骨小梁结构更加完善,空骨陷窝进一步减少(P<0.05),与正常组无显著差异(P>0.05);②模型组血清中总抗氧化能力、超氧化物歧化酶、谷胱甘肽过氧化物酶和还原型谷胱甘肽的含量均显著低于正常组(P<0.05),而丙二醛浓度显著高于正常组(P<0.05);对照组以上指标稍有改善,但与模型组比较差异不显著(P>0.05);富血小板血浆以上氧化应激指标较模型组和对照组明显改善(P<0.05);③模型组股�展开更多
Scutellarin(SCU)is a herbal flavonoid glucuronide with multiple pharmacological activities,including antioxidant,anti-inflammation,vascular relaxation,anti-platelet,and myocardial protection.However,the effect of SCU...Scutellarin(SCU)is a herbal flavonoid glucuronide with multiple pharmacological activities,including antioxidant,anti-inflammation,vascular relaxation,anti-platelet,and myocardial protection.However,the effect of SCU on complete Freund’s adjuvant(CFA)-induced rheumatoid arthritis(RA)had not been studied.In this study,we investigated the beneficial effects of SCU in the CFA-induced RA mice model and the anti-arthritic activity was evaluated by paw edema.Enzyme-linked immunosorbent assay(ELISA)was carried out to evaluate the plasma levels of immunoglobulin(Ig)G,IgE,tumor necrosis factor(TNF)-α,interleukin(IL)-1β,IL-6,receptor activator of nuclear factor-κB ligand(RANKL),and osteoprotegerin(OPG).Histological slides were prepared from the harvested paws of mice to determine the pathological changes in the joints.The proportions of T helper type 1(Th1)and T helper type 2(Th2)cells of CD4+T lymphocyte subsets were analyzed by flow cytometry.The expression of Kelch-like ECHassociated protein 1(Keap1),nuclear factor erythroid 2-related factor 2(Nrf2),and heme oxygenase-1(HO-1)was analyzed using real-time quantitative PCR(RT-qPCR)and western blotting assays.The present study demonstrated that SCU prevented CFA-induced RA,and inhibited the expression of inflammation factors,IgG,IgE,TNF-α,IL-1β,and IL-6.While SCU also reduced the RANKL level,it increased OPG expression in RA mice.The Th1/Th2 ratio was significantly lower in mice treated with SCU.Additionally,HO-1 expression was reduced while the expression of Keap1 and Nrf2 was elevated following SCU treatment.Results provide preliminary evidence to employ SCU in arthritis treatment which might be related to the regulation of Th1/Th2 balance and the Keap1/Nrf2/HO-1 pathway.展开更多
文摘背景:氧化应激在股骨头坏死损伤中发挥重要作用,富血小板血浆富含生长因子,可以加快骨折愈合,配合髓芯减压术能促进非创伤性股骨头坏死的恢复。目的:探讨富血小板血浆联合髓芯减压术能否通过Keap1/Nrf2/HO-1信号通路抑制兔激素性股骨头坏死模型氧化应激反应。方法:将40只实验新西兰兔随机分为正常组、模型组、对照组和富血小板血浆组,每组10只。除正常组外其他3组兔在无菌环境下建立激素性股骨头坏死模型,术后4周向富血小板血浆组动物股骨头内髓芯减压后注射植入0.4 mL 3%的富血小板血浆,对照组兔只进行髓芯减压术治疗,对照组与模型组兔正常饲养。14周后苏木精-伊红染色观察各组兔股骨头骨髓腔内病理学变化和骨陷窝空缺率,检测各组兔血清中总抗氧化能力、超氧化物歧化酶、谷胱甘肽过氧化物酶、还原型谷胱甘肽及丙二醛等氧化应激指标活性,TUNEL检测股骨头组织内骨细胞凋亡情况,免疫荧光检测股骨头组织内Keap1、Nrf2分布,Western Blot检测股骨头组织内Keap1、Nrf2、HO-1蛋白表达。实验方案经青海大学附属医院动物实验伦理委员会批准(批准号为qhdx-201908374)。结果与结论:①与正常组相比,模型组骨组织内骨小梁变细,结构紊乱;对照组较模型组有所改善,骨小梁结构得到恢复,空骨陷窝减少(P<0.05),富血小板血浆组经富血小板血浆联合髓芯减压治疗较对照组得到进一步改善,骨小梁结构更加完善,空骨陷窝进一步减少(P<0.05),与正常组无显著差异(P>0.05);②模型组血清中总抗氧化能力、超氧化物歧化酶、谷胱甘肽过氧化物酶和还原型谷胱甘肽的含量均显著低于正常组(P<0.05),而丙二醛浓度显著高于正常组(P<0.05);对照组以上指标稍有改善,但与模型组比较差异不显著(P>0.05);富血小板血浆以上氧化应激指标较模型组和对照组明显改善(P<0.05);③模型组股�
文摘Scutellarin(SCU)is a herbal flavonoid glucuronide with multiple pharmacological activities,including antioxidant,anti-inflammation,vascular relaxation,anti-platelet,and myocardial protection.However,the effect of SCU on complete Freund’s adjuvant(CFA)-induced rheumatoid arthritis(RA)had not been studied.In this study,we investigated the beneficial effects of SCU in the CFA-induced RA mice model and the anti-arthritic activity was evaluated by paw edema.Enzyme-linked immunosorbent assay(ELISA)was carried out to evaluate the plasma levels of immunoglobulin(Ig)G,IgE,tumor necrosis factor(TNF)-α,interleukin(IL)-1β,IL-6,receptor activator of nuclear factor-κB ligand(RANKL),and osteoprotegerin(OPG).Histological slides were prepared from the harvested paws of mice to determine the pathological changes in the joints.The proportions of T helper type 1(Th1)and T helper type 2(Th2)cells of CD4+T lymphocyte subsets were analyzed by flow cytometry.The expression of Kelch-like ECHassociated protein 1(Keap1),nuclear factor erythroid 2-related factor 2(Nrf2),and heme oxygenase-1(HO-1)was analyzed using real-time quantitative PCR(RT-qPCR)and western blotting assays.The present study demonstrated that SCU prevented CFA-induced RA,and inhibited the expression of inflammation factors,IgG,IgE,TNF-α,IL-1β,and IL-6.While SCU also reduced the RANKL level,it increased OPG expression in RA mice.The Th1/Th2 ratio was significantly lower in mice treated with SCU.Additionally,HO-1 expression was reduced while the expression of Keap1 and Nrf2 was elevated following SCU treatment.Results provide preliminary evidence to employ SCU in arthritis treatment which might be related to the regulation of Th1/Th2 balance and the Keap1/Nrf2/HO-1 pathway.
