Triple Negative Breast Cancer(TNBC)immunotherapy has recently shown promising approach.However,some TNBC patients presented with resistance.One of the reasons was attributed to the excessive release of cytokines at th...Triple Negative Breast Cancer(TNBC)immunotherapy has recently shown promising approach.However,some TNBC patients presented with resistance.One of the reasons was attributed to the excessive release of cytokines at the tumor microenvironment(TME)such as Tumor necrosis factor alpha(TNF-α)and Interleukin-10(IL-10).Fine regulation of these cytokines’levels via non-coding RNAs(ncRNAs)might alleviate the immune quiescent nature of TME at TNBC tumors.However,the extrapolation of ncRNAs as therapeutic tools is highly challenging.Therefore,disentanglement the nature for the isolation of natural compounds that could modulate the ncRNAs and their respective targets is an applicable translational therapeutic approach.Hence,this study aimed to targeting the chief immune suppressive cytokines at the TME(TNF-αand IL-10)via ncRNAs and to examine the effects of Rosemary aerial parts extract on the expression levels of these ncRNAs in TNBC.Results revealed miR-17-5p as a dual regulator of TNF-αand IL-10.Moreover,an intricate interaction has been shown between miR-17-5p and the oncogenic lncRNAs:MALAT1 and H19.Knocking down of MALAT1 and/or H19 caused an induction in miR-17-5p and reduction in TNF-αand IL-10 expression levels.miR-17-5p was found to be down-regulated,while TNF-α,IL-10,MALAT1 and H19 were up-regulated in BC patients.Forced expression of miR-17-5p in MDA-MB-231 cells reduced TNF-α,IL-10,MALAT1 and H19 expression levels,as well as several BC hallmarks.In a translational approach,ursolic acid(UA)isolated from rosemary induced the expression of miR-17-5p,MALAT1 and decreased H19 expression levels.In conclusion,this study suggests miR-17-5p as a tumor suppressor and an immune-activator miRNA in BC through tuning up the immunological targets TNF-α,IL-10 at the TME and the oncological mediators MALAT1 and H19 lncRNAs.展开更多
目的探讨生物力学因素与骨形态发生蛋白-2(bone morphogenetic protein 2,BMP2)单核苷酸多态性对颈椎后纵韧带骨化(ossification of the posterior longitudinal ligament,OPLL)成骨作用的影响,为进一步发现OPLL多因素共同致病的具体机...目的探讨生物力学因素与骨形态发生蛋白-2(bone morphogenetic protein 2,BMP2)单核苷酸多态性对颈椎后纵韧带骨化(ossification of the posterior longitudinal ligament,OPLL)成骨作用的影响,为进一步发现OPLL多因素共同致病的具体机制奠定基础。方法采集颈椎OPLL病变组手术减压过程中骨化部位的后纵韧带和颈椎外伤等手术减压过程中的正常对照组后纵韧带。利用PCR和直接测序法分析BMP2上2个单核苷酸多态性位点109T>G(rs2273073),570A>T(rs235768)基因型及等位基因型的分布。Masson三色染色观察组织学结构改变。免疫组织化学染色和Western blot法检测BMP2的分布和表达。用C3H10T1/2细胞做转染构建细胞模型:正常组、空载体组、BMP2野生型组、BMP2(rs2273073)单突变组、BMP2(rs235768)单突变组、BMP2(rs2273073,rs235768)双突变组。采用机械应力装置对接种于Flexercell板的细胞施加10%、0.5Hz的机械应力,持续加载24h。以同样接种于Flexereell板未施加机械应力的细胞作为对照组。采用Western blot法检测机械应力加载前后各组BMP2表达情况。结果 Masson三色染色组织学观察显示病变组有成骨结构改变,免疫组织化学染色和Western blot法显示病变组BMP2的表达增加。机械应力加载后,细胞转染模型BMP2(rs2273073)单突变组和BMP2(rs2273073,rs235768)双突变组的BMP2表达较未施加应力组明显增加,差异具有统计学意义(P<0.05)。结论 BMP2单核苷酸多态性位点109T>G(rs2273073)的突变不仅能提高人们对OPLL的易感性,同时能提高OPLL患者对机械应力的敏感度,从而加速OPLL的进展。展开更多
基金The study was approved from the ethical committee of the German University in Cairo(Ethical Approval No.210,Date of Approval:12-01-2019)Cairo University(Ethical Approval No.N-42-2019Date of Approval:23-08-2019).
文摘Triple Negative Breast Cancer(TNBC)immunotherapy has recently shown promising approach.However,some TNBC patients presented with resistance.One of the reasons was attributed to the excessive release of cytokines at the tumor microenvironment(TME)such as Tumor necrosis factor alpha(TNF-α)and Interleukin-10(IL-10).Fine regulation of these cytokines’levels via non-coding RNAs(ncRNAs)might alleviate the immune quiescent nature of TME at TNBC tumors.However,the extrapolation of ncRNAs as therapeutic tools is highly challenging.Therefore,disentanglement the nature for the isolation of natural compounds that could modulate the ncRNAs and their respective targets is an applicable translational therapeutic approach.Hence,this study aimed to targeting the chief immune suppressive cytokines at the TME(TNF-αand IL-10)via ncRNAs and to examine the effects of Rosemary aerial parts extract on the expression levels of these ncRNAs in TNBC.Results revealed miR-17-5p as a dual regulator of TNF-αand IL-10.Moreover,an intricate interaction has been shown between miR-17-5p and the oncogenic lncRNAs:MALAT1 and H19.Knocking down of MALAT1 and/or H19 caused an induction in miR-17-5p and reduction in TNF-αand IL-10 expression levels.miR-17-5p was found to be down-regulated,while TNF-α,IL-10,MALAT1 and H19 were up-regulated in BC patients.Forced expression of miR-17-5p in MDA-MB-231 cells reduced TNF-α,IL-10,MALAT1 and H19 expression levels,as well as several BC hallmarks.In a translational approach,ursolic acid(UA)isolated from rosemary induced the expression of miR-17-5p,MALAT1 and decreased H19 expression levels.In conclusion,this study suggests miR-17-5p as a tumor suppressor and an immune-activator miRNA in BC through tuning up the immunological targets TNF-α,IL-10 at the TME and the oncological mediators MALAT1 and H19 lncRNAs.
文摘目的探讨生物力学因素与骨形态发生蛋白-2(bone morphogenetic protein 2,BMP2)单核苷酸多态性对颈椎后纵韧带骨化(ossification of the posterior longitudinal ligament,OPLL)成骨作用的影响,为进一步发现OPLL多因素共同致病的具体机制奠定基础。方法采集颈椎OPLL病变组手术减压过程中骨化部位的后纵韧带和颈椎外伤等手术减压过程中的正常对照组后纵韧带。利用PCR和直接测序法分析BMP2上2个单核苷酸多态性位点109T>G(rs2273073),570A>T(rs235768)基因型及等位基因型的分布。Masson三色染色观察组织学结构改变。免疫组织化学染色和Western blot法检测BMP2的分布和表达。用C3H10T1/2细胞做转染构建细胞模型:正常组、空载体组、BMP2野生型组、BMP2(rs2273073)单突变组、BMP2(rs235768)单突变组、BMP2(rs2273073,rs235768)双突变组。采用机械应力装置对接种于Flexercell板的细胞施加10%、0.5Hz的机械应力,持续加载24h。以同样接种于Flexereell板未施加机械应力的细胞作为对照组。采用Western blot法检测机械应力加载前后各组BMP2表达情况。结果 Masson三色染色组织学观察显示病变组有成骨结构改变,免疫组织化学染色和Western blot法显示病变组BMP2的表达增加。机械应力加载后,细胞转染模型BMP2(rs2273073)单突变组和BMP2(rs2273073,rs235768)双突变组的BMP2表达较未施加应力组明显增加,差异具有统计学意义(P<0.05)。结论 BMP2单核苷酸多态性位点109T>G(rs2273073)的突变不仅能提高人们对OPLL的易感性,同时能提高OPLL患者对机械应力的敏感度,从而加速OPLL的进展。
