简介:AbstractBackground:Psoriatic arthritis (PsA) is an inflammatory arthropathy characterized by psoriasis and bone erosion on radiology. Dickkopf-1 (Dkk-1) is considered to be the main inhibitor of the Wnt signaling pathway and results in reduced osteoblast proliferation. The aim of this study was to investigate the serum level of Dkk-1 and its association with bone erosion in PsA patients.Methods:Serum Dkk-1 levels were measured by enzyme-linked immunosorbent assay (ELISA) in 69 patients with PsA and 60 controls, including 39 rheumatoid arthritis (RA) patients, and 21 healthy controls (HCs). Rheumatoid factor and anti-cyclic citrullinated peptide levels were also determined by ELISA. The association of Dkk-1 level with clinical and laboratory features of PsA was analyzed. Logistic regression analysis was used to analyze the risk factors for bone erosion in PsA.Results:Dkk-1 was elevated in 68.1% (47/69) of the patients with PsA, 46.2% (18/39) of RA patients, and 9.5% (2/21) of HCs. Serum Dkk-1 concentration was significantly higher in PsA patients compared with that in HCs. The level of serum Dkk-1 was correlated with a swollen joint count, and levels of complement components 3 and 4. Elevated Dkk-1 level (odds ratio = 4.440, 95% confidence interval: 1.246-15.817, P = 0.021) was identified as the risk factor for bone erosion in PsA.Conclusions:The serum level of Dkk-1 is abnormally elevated in PsA patients. The elevation of Dkk-1 might be involved in the mechanism of bone erosion in patients with PsA.
简介:AbstractBackground:Fibroblast-like synoviocytes (FLSs), resident mesenchymal cells of synovial joints, play an important role in the pathogenesis of rheumatoid arthritis (RA). Dickkopf-1 (DKK-1) has been proposed to be a master regulator of bone remodeling in inflammatory arthritis. Here, potential impairation on the activity of FLSs derived from RA to small interfering RNAs (siRNAs) targeting DKK-1 was investigated.Methods:siRNAs targeting DKK-1 were transfected into FLSs of patients with RA. Interleukin (IL)-1β, IL-6, IL-8, matrix metalloproteinase (MMP) 2, MMP3, MMP9, transforming growth factor (TGF)-β1, TGF-β2 and monocyte chemoattractant protein (MCP)-1 levels in the cell culture supernatant were detected by enzyme-linked immunosorbent assay (ELISA). Invasion assay and 3H incorporation assay were utilized to investigate the effects of siRNAs targeting DKK-1 on FLSs invasion and cell proliferation, respectively. Western blotting was performed to analyze the expression of nuclear factor (NF)-κB, interleukin-1 receptor-associated kinase (IRAK)1, extracellular regulated protein kinases (ERK)1, Jun N-terminal kinase (JNK) and β-catenin in FLSs.Results:DKK-1 targeting siRNAs inhibited the expression of DKK-1 in FLSs (P < 0.01). siRNAs induced a significant reduction of the levels of IL-6, IL-8, MMP2, MMP3 and MMP9 in FLSs compared to the control group (P < 0.05). DKK-1 targeting siRNAs inhibited the proliferation and invasion of FLSs (P < 0.05). Important molecules of pro-inflammatory signaling in FLSs, including IRAK1 and ERK1, were decreased by the inhibition of DKK-1 in FLSs. In contrast, β-catenin, a pivotal downstream molecule of the Wnt signaling pathway was increased.Conclusions:By inhibiting DKK-1, we were able to inhibit the proliferation, invasion and pro-inflammatory cytokine secretion of FLSs derived from RA, which was mediated by the ERK or the IRAK-1 signaling pathway. These data indicate the application of DKK-1 silencing could be a potential therapeutic approach to RA.
简介:背景:近年来已有许多学者开始探讨骨细胞和成骨细胞凋亡在激素性股骨头缺血坏死中的作用,对其发病机制有了新的认识。但遗憾的是,这些研究还尚未深入到对骨细胞、成骨细胞凋亡机制的研究中。有学者指出激素可以增加Wnt信号途径中的拮抗分子Dickkopf-1。目的:通过探索Dickkopf-1与细胞凋亡在激素性股骨头缺血坏死中的作用,了解Dickkopf-1及细胞凋亡与激素性股骨头缺血坏死的关系。方法:收集经全髋关节置换术取下的激素性股骨头缺血坏死股骨头标本14例作为实验组,新鲜股骨颈骨折髋关节置换术后标本8例作为对照组。电镜观察骨细胞形态变化,苏木精-伊红染色计数空缺骨陷窝,TUNEL法检测骨细胞凋亡,免疫组织化学法检测Dickkopf-1表达。采用Spearman线性相关分析法分析实验组的Dickkopf-1表达率与骨细胞凋亡指数的相关性。结果与结论:①实验组空缺骨陷窝率明显高于对照组,差异有显著性意义(P<0.05);②实验组Dickkopf-1水平明显高于对照组,差异有显著性意义(P<0.05);③实验组细胞凋亡指数明显高于对照组,差异有显著性意义(P<0.05);④实验组中Dickkopf-1表达率与骨细胞凋亡指数呈正相关(r=0.623);⑤结果表明,Dickkopf-1与细胞凋亡共同参与了激素性股骨头缺血坏死的过程,Dickkopf-1水平升高可能是激素性股骨头缺血坏死发病的重要促进因素;骨细胞凋亡在股骨头缺血坏死过程中起重要作用。
简介:摘要目的探讨腹腔脱落细胞Dickkopf-3(DKK3)基因甲基化在Ⅳ期胃癌病情及预后评估中的临床意义。方法选择2014年1月至2017年12月湖北医药学院附属随州医院诊治的原发性Ⅳ期胃癌患者为研究对象(胃癌组),检测Ⅳ期胃癌患者(胃癌组,n=120)腹腔脱落细胞、外周血和胃良性疾病患者(对照组,n=60)腹腔脱落细胞DKK3基因甲基化并比较其差异,分析胃癌组患者不同临床病理因素中腹腔脱落细胞DKK3基因甲基化的差异,Kaplan-Meier法对胃癌患者腹腔脱落细胞DKK3基因甲基化和未甲基化患者行生存分析。受试者工作特征(ROC)曲线比较腹腔脱落细胞及外周血DKK3诊断胃癌腹膜种植转移敏感度及特异性。胃癌组和对照组患者对比采用t或χ2检验。结果胃癌组患者腹腔脱落细胞DKK3基因甲基化率(73.3%)均显著高于胃癌组患者外周血(60.0%)及对照组患者腹腔脱落细胞(8.3%,χ2=70.303,P<0.05);胃癌组患者腹腔脱落细胞DKK3基因甲基化率在分化程度、肿瘤最大径和淋巴结转移数目的差异均有统计学意义(χ2=4.096、5.507、6.525,P值均<0.05)。胃癌患者中腹腔脱落细胞DKK3基因甲基化的患者中位生存期显著低于未甲基化患者[(13.2±1.4)个月比(16.4±1.7)个月,Log-rank=7.817,P<0.01],差异有统计学意义。腹腔脱落细胞DKK3基因甲基化诊断腹膜种植转移敏感度(0.753)及特异性(0.811)均显著高于外周血DKK3基因甲基化敏感度(0.536)及特异性(0.609,P值均<0.05),差异有统计学意义。结论Ⅳ期胃癌患者腹腔脱落细胞DKK3基因甲基化率显著高于外周血,腹腔脱落细胞DKK3基因甲基化诊断胃癌腹膜种植转移的灵敏度及特异性均显著高于外周血。
简介:摘要目的探讨血浆Dickkopf-1与急性缺血性卒中患者早期神经功能恶化(early neurological deterioration, END)和转归的关系。方法连续纳入2020年1月至2020年12月在南京江北医院神经内科住院的首发急性缺血性卒中患者。所有患者均在发病后24 h内入院。END定义为入院后7 d内任意一次美国国立卫生研究院卒中量表(National Institutes of Health Stroke Scale, NIHSS)评分较基线增加≥2分或运动项评分增加≥1分。转归不良定义为发病后90 d时改良Rankin量表评分>2分。应用多变量logistic回归分析确定Dickkopf-1与END和转归的独立相关性。应用受试者工作特征(receiver operating characteristic, ROC)曲线评估血浆Dickkopf-1对END和转归不良的预测价值。结果共纳入176例患者,男性92例(52.3%),年龄(66.7±9.6)岁。中位Dickkopf-1为4.30 μg/L,52例(29.5%)发生END,81例(46.0%)转归不良。多变量logistic回归分析表明,Dickkopf-1较高是END[优势比(odds ratio, OR)1.696,95%置信区间(confidence interval, CI)1.223~2.351;P=0.002]和转归不良(OR 1.566,95% CI 1.156~2.121;P=0.004)的独立预测因素。ROC曲线分析显示,血浆Dickkopf-1对END具有良好的预测价值,其曲线下面积为0.717(95% CI 0.634~0.801);最佳截断值为4.40 μg/L,对应的预测敏感性和特异性分别为71.2%和60.5%。Dickkopf-1对转归不良也具有较好的预测价值,其曲线下面积为0.701(95% CI 0.624~0.778);最佳截断值为4.25 μg/L,对应的预测敏感性和特异性分别为65.4%和61.1%。结论血浆Dickkopf-1对急性缺血性卒中患者的END和转归不良均具有较好的预测价值。
简介:【摘要】目的:探讨老年粗隆间骨折患者围手术期血清骨硬化蛋白及Dickkopf-3表达水平变化规律。方法:选择我院于2017年5月至2018年5月一年期间收治的老年粗隆间骨折患者30例作为研究对象,分别采集所有患者手术前1天和手术后1、5天的血清样本,检测其中的骨硬化蛋白及Dickkopf-3水平。结果:经过检测与记录,30例患者骨硬化蛋白和Dickkopf-3水平检测结果均呈现出先升高后降低的规律,术前1天到术后1天水平升高,术后5天有所下降,术前术后1天骨硬化蛋白和Dickkopf-3水平均有较大差异(P<0.05),但术后1天与5天之间Dickkopf-3水平差异较大(P<0.05),骨硬化蛋白差异较小(P>0.05)。结论:老年粗隆间骨折患者围术期血清骨硬化蛋白及Dickkopf-3表达水平均呈现出先升高后降低的规律,Dickkopf-3水平减低趋势更为明显,可将骨硬化蛋白和Dickkopf-3表达水平变化作为骨折后机体称骨能力的标志物。
简介:摘要目的探讨DKK1(Dickkopf1)通过Wnt/β-catenin信号通路对人晶状体上皮细胞(LECs)增生的影响及其可能的作用机制,为晶状体后囊膜混浊(PCO)的临床治疗提供新靶点。方法将人LECs系(SRA 01/04细胞)分为Wnt3a过表达组、DKK1组和对照组。Wnt3a过表达组采用脂质体介导转染技术将Wnt3a cDNA表达载体瞬时转染入人SRA 01/04细胞构建PCO模型。DKK1组转染Wnt3a cDNA表达载体后48 h在培养基中加入100 μg/ml DKK1进行干预,对照组细胞转染pcDNA3-HA表达载体。采用细胞计数试剂盒-8(CCK-8)法检测各组细胞生存率;采用免疫细胞化学法检测各组细胞增生细胞核抗原(PCNA)蛋白的表达;采用Western blot法检各组细胞中Wnt3a、CyclinD1和C-Myc蛋白的表达;采用免疫荧光技术法检测并定位各组细胞中β-catenin的表达。结果Western blot检测发现,Wnt3a过表达组Wnt3a蛋白的相对表达量为0.84±0.06,高于对照组的0.49±0.07,差异有统计学意义(t=3.704,P<0.05)。CCK-8试验显示,不同时间点各组细胞生存率总体比较差异均有统计学意义(F分组=10.910,P<0.05;F时间=6.041,P<0.05),其中Wnt3a过表达组细胞生存率明显高于对照组,DKK1组细胞生存率明显低于Wnt3a过表达组,差异均有统计学意义(均P<0.05)。对照组、Wnt3a过表达组和DKK1组细胞中PCNA阳性表达率分别为(9.4±1.4)%、(43.4±5.4)%和(14.2±2.3)%,总体比较差异有统计学意义(F=28.250,P<0.05),其中DKK1组和对照组细胞中PCNA阳性表达率均低于Wnt3a过表达组,差异均有统计学意义(均P<0.05)。免疫荧光技术检测发现,Wnt3a过表达组β-catenin蛋白主要表达于细胞质和细胞核,对照组β-catenin蛋白仅分布于细胞质,DKK1组β-catenin蛋白分布于细胞质,少量分布于细胞核。Western blot法检测显示,对照组、Wnt3a过表达组和DKK1组C-Myc相对表达量分别为0.59±0.05、0.93±0.02和0.47±0.08,CyclinD1的相对表达量分别为0.64±0.07、0.84±0.03和0.55±0.10,总体比较差异均有统计学意义(F=20.580、5.040,均P<0.05);其中Wnt3a过表达组C-Myc和CyclinD1相对表达量高于对照组和DKK1组,差异均有统计学意义(均P<0.05)。结论DKK1抑制SRA01/04细胞中Wnt3a过表达诱导的Wnt/β-catenin信号通路活化,下游靶蛋白CyclinD1和C-Myc表达下调,可能是DKK1抑制人LECs增生的生物学机制。
简介:摘要琅玡王氏家族在魏晋南北朝时段,历经发端、兴盛和低谷,不仅与自身的积极努力和家族团结相关,更与魏晋时段的历史政治现状密切相关,在动荡的政治格局中,影响家族生存发展更加复杂,但琅玡王氏秉承家族文化,不仅在政治上,在文化艺术上也获得很大赞誉。