Background Solar ultraviolet (UV) irradiation induces the production of matrix metalloproteinases (MMPs) by activating cellular signalling transduction pathways. MMPs are responsible for the degradation and/or inh...Background Solar ultraviolet (UV) irradiation induces the production of matrix metalloproteinases (MMPs) by activating cellular signalling transduction pathways. MMPs are responsible for the degradation and/or inhibition of synthesis of collagenous extracellular matrix in connective tissues. We mimicked the action of environmental ultraviolet on skin and investigated the effects of UVB-irradiated human keratinocytes HaCaT and IL-1α on mitogen activated protein (MAP) kinase activation, c-Jun and c-Fos (AP- 1 is composed of Jun and Fos proteins) mRNA expression and MMP-1 production in UVA-irradiated dermal fibroblasts.展开更多
目的探讨艾灸关元穴延缓皮肤衰老的作用机制。方法通过皮下注射D-半乳糖建立皮肤衰老大鼠模型,造模过程中,各治疗组分别给予艾灸、针刺治疗,连续治疗21天后,测定大鼠血清及皮肤组织丙二醛(MDA)、活性氧(ROS)、过氧化氢(H2O2)、超氧化物...目的探讨艾灸关元穴延缓皮肤衰老的作用机制。方法通过皮下注射D-半乳糖建立皮肤衰老大鼠模型,造模过程中,各治疗组分别给予艾灸、针刺治疗,连续治疗21天后,测定大鼠血清及皮肤组织丙二醛(MDA)、活性氧(ROS)、过氧化氢(H2O2)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性、皮肤含水量及胶原蛋白含量,RT-PCR法检测皮肤组织MMP-1/TIMP-1 m RNA表达量。结果模型组血清及皮肤组织SOD、CAT活性显著低于艾灸关元穴组(P<0.05),MDA、H2O2及ROS含量显著高于艾灸关元穴组(P<0.05),皮肤组织中MMP-1表达量高于艾灸关元穴组(P<0.05),TIMP-1表达量显著低于艾灸关元穴组(P<0.05)。结论艾灸关元穴通过调节氧化应激紊乱及MMP-1/TIMP-1在皮肤组织中的表达起到延缓衰老的作用。展开更多
基金This research was supported by a grant from National Natural Science Foundation of China (No. 30271195)
文摘Background Solar ultraviolet (UV) irradiation induces the production of matrix metalloproteinases (MMPs) by activating cellular signalling transduction pathways. MMPs are responsible for the degradation and/or inhibition of synthesis of collagenous extracellular matrix in connective tissues. We mimicked the action of environmental ultraviolet on skin and investigated the effects of UVB-irradiated human keratinocytes HaCaT and IL-1α on mitogen activated protein (MAP) kinase activation, c-Jun and c-Fos (AP- 1 is composed of Jun and Fos proteins) mRNA expression and MMP-1 production in UVA-irradiated dermal fibroblasts.
文摘目的探讨艾灸关元穴延缓皮肤衰老的作用机制。方法通过皮下注射D-半乳糖建立皮肤衰老大鼠模型,造模过程中,各治疗组分别给予艾灸、针刺治疗,连续治疗21天后,测定大鼠血清及皮肤组织丙二醛(MDA)、活性氧(ROS)、过氧化氢(H2O2)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性、皮肤含水量及胶原蛋白含量,RT-PCR法检测皮肤组织MMP-1/TIMP-1 m RNA表达量。结果模型组血清及皮肤组织SOD、CAT活性显著低于艾灸关元穴组(P<0.05),MDA、H2O2及ROS含量显著高于艾灸关元穴组(P<0.05),皮肤组织中MMP-1表达量高于艾灸关元穴组(P<0.05),TIMP-1表达量显著低于艾灸关元穴组(P<0.05)。结论艾灸关元穴通过调节氧化应激紊乱及MMP-1/TIMP-1在皮肤组织中的表达起到延缓衰老的作用。