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1.
目的 探究焦亡相关差异表达基因(DEGs)在乳腺癌中预后价值并构建预后风险模型。 方法 从癌症基因组图谱(TCGA)和肿瘤基因表达数据库(GEO)官网下载乳腺癌的基因测序、临床数据,筛选焦亡相关DEGs。将乳腺癌患者进行聚类分析。在TCGA队列中以最小绝对收缩和选择算子(LASSO)方法建立模型。利用Kaplan-Meier生存曲线、受试者工作特征曲线(ROC)、单因素及多因素Cox回归独立预后因素分析等评价该模型。GEO队列为验证集。通过GO、KEGG、ssGSEA分析风险DEGs的富集情况。 结果 筛选出焦亡相关DEGs,聚类分析可见C2组总生存期(OS)延长,差异有统计学意义(P=0.020)。该模型K-M生存分析显示,高风险组OS缩短(TCGA队列中P<0.001,GEO队列中P=0.018)。ROC曲线下面积(AUC)表明该模型具有一定预测能力。单因素、多因素Cox回归分析表明,年龄、M、N分期和风险评分为OS的独立预测因子。GO、 KEGG富集与ssGSEA分析证实了风险相关DEGs与免疫炎症因子和通路有关。 结论 本研究构建了由9个焦亡相关基因组成的乳腺癌预后风险模型,为乳腺癌患者的风险预后评估提供了参考。  相似文献   
2.
肾癌是泌尿系统常见的恶性肿瘤之一。近年来,我国肾癌的发病率呈逐年上升的趋势,严重威胁着人们的健康。调节性细胞死亡是由一种细胞主动有序的死亡方式,普遍存在于生命活动过程中,在维系生命活动的平衡中发挥着至关重要的作用。近期Science杂志上报道了一种新的调节性细胞死亡方式即铜死亡,进一步强化了生命体中细胞死亡的重要性。随着对调节性细胞死亡认识的不断深入,越来越多的研究显示不同的调节性细胞死亡(如铁死亡、焦亡、自噬等)均与肾癌的发生、发展密切相关。如诱导细胞铁死亡将显著抑制肾癌的侵袭和转移、并与肾癌患者的更好预后密切相关;细胞焦亡不仅可以诱导肾癌细胞死亡还可以激活抗肾癌的免疫应答;自噬在肾癌中具有“双向”作用,增强自噬可抑制肾癌细胞生长,但也可能减弱联合用药治疗的效果;抑制细胞凋亡和坏死性凋亡可以显著促进肾癌细胞的增殖、侵袭等。本文将综述铁死亡、细胞焦亡、自噬、细胞凋亡和坏死性凋亡的分子机制和在肾癌发生、发展中作用的研究进展并进行展望,为探索肾癌的发病机制和潜在的治疗靶点提供新的视角。  相似文献   
3.
目的:考察淫羊藿苷在治疗骨关节炎中的潜在价值,以及淫羊藿苷对核苷酸结合寡聚化结构域样受体蛋白3(NLRP3)炎性小体和半胱天冬酶-1(Caspase-1)的调控作用。方法:本研究通过脂多糖(LPS)诱导大鼠膝关节软骨细胞建立体外骨关节炎模型,通过碘乙酸单钠处理SD大鼠建立体内骨关节炎模型。通过乳酸脱氢酶漏出实验检测细胞毒性,通过MTT实验检测细胞活力。通过qRT-PCR检测NLRP3 mRNA的表达,通过Western Blotting检测NLRP3、IL-1β、IL-18、MMP-1、MMP-13、Collagen Ⅱ、Caspase-1、ASC和GSDMD的蛋白表达。用免疫荧光法和免疫组化法检测软骨细胞和大鼠软骨中的NLRP3表达;番红O/固绿染色评价大鼠软骨病变。结果:与LPS组比较,LPS+ICA组LDH的漏出率、IL-1β、IL-18、MMP-1、MMP-13、NLRP3、Caspase-1、ASC和GSDMD的表达水平明显降低,而Collagen Ⅱ明显升高(P<0.05)。与LPS+ICA+pcDNA3.1-NC组比较,LPS+ICA+pcDNA3.1-NLRP3组的乳酸脱氢酶漏出率及NLRP3炎性小体相关蛋白表达水平明显升高(P<0.05)。与对照组比较,OA组大鼠软骨组织中NLRP3阳性细胞数量显著增加,而OA+ICA组的NLRP3阳性细胞数量明显降低(P<0.05)。与OA组比较,OA+ICA组的NRLP3、IL-1β、IL-18、MMP-1、MMP-13、Caspase-1、ASC和GSDMD的蛋白表达水平明显降低,而Collagen的蛋白表达水平明显升高(P<0.05)。结论:淫羊藿苷通过抑制NLRP3和Caspase-1信号转导来抑制脂多糖诱导的软骨细胞损伤和细胞焦亡,从而减轻大鼠骨关节炎。  相似文献   
4.
ObjectiveTo investigate the potential anti-tumor mechanisms of naphthoquinone compound shikonin (SKN) extracted from the root of Chinese herbal medicine plant lithospermum (Lithospermum erythrorhizon Sieb. & Zucc.).MethodsWe first observed that SKN treatment led to swelling and bubbles in HeLa cells that were similar to the phenotype of cell pyroptosis. Subsequently, the HeLa cells experienced a pyroptotic process with SKN, and this was then assessed using lactate dehydrogenase (LDH) release and propidium iodide (PI)/Hoechst double staining experiments. Pyroptosis is defined as gasdermin-mediated programmed necroptosis. To identify the potential pyroptosis machinery, two strategies were utilized that included a genome-wide clustered regularly interspaced short palindromic repeats (CRISPR)-associated protein 9 screening experiment and a pyroptosis reconstitution assay executed by each of the five known gasdermins (GSDMA-E). Moreover, endogenous cleavage was also detected in a panel of tumor cell lines.ResultsCompared with the control, both the LDH release and PI/Hoechst double-staining experiments suggested that SKN induced perforation and enhancement of the permeability of the cell membranes that resulted in pyroptosis in HeLa cells (P = .028 and P = .032, respectively). In addition, the reconstitution assays in human embryonic kidney 293T (HEK-293T) cells and endogenous cleavage assays in HeLa cells indicated that the pyroptosis was controlled by GSDME. In addition, we also found SKN could trigger pyroptosis in a panel of tumor cell lines in which the cellular morphologies were proportional to the GSDME expression levels. Additionally, the cleavage of GSDME was also detected, and this was indicative of a similar GSDME-mediated mechanism.ConclusionOur study not only explained the molecular mechanism of cytotoxicity of SKN to various tumor cells, but also provided additional information for the potential clinical application of natural naphthoquinone compounds against cancer.  相似文献   
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6.
《Vaccine》2019,37(33):4681-4685
Rabies virus infects almost all mammals resulting in lethal disease. To date there is no treatment available for symptomatic rabies and there is an urgent need to develop treatment strategies that would prolong survival, thereby providing a window of opportunity for the host to mount a protective immune response. We hypothesized that both virus and excessive immune response contribute to disease and that interfering with both is necessary to prevent lethal disease. Here, we have inhibited the pro-inflammatory response associated with pyroptosis and showed that inhibition of CASP-1 had a beneficial effect on survival time. Our results confirm that some inflammatory responses may be involved in the pathogenesis of severe disease and the results suggest that effective intervention includes inhibition of virus and host response.  相似文献   
7.
《Immunobiology》2020,225(2):151884
Pyroptosis is a newly discovered untypical form of programmed cell death by inflammatory response, which is dependent on the classic pathway of Caspase-1 and the non-canonical pathway of Caspase-11 in mice or orthologue Caspase-4/-5 in Humans. It has been found that the Gasdermin family of protein is a key molecule in the formation of membrane pores of pyroptosis. After being cleaved by inflammatory caspases, it releases a N-terminal fragment with perforating activity to trigger pyroptosis. That pyroptosis is closely related to the occurrence and development of certain diseases. Now, the molecular mechanism of pyroptosis and pyroptosis-related diseases are reviewed.  相似文献   
8.
细胞程序性死亡是指细胞依赖于某些特定的基因编码信号或活动的死亡方式。细胞凋亡、自噬、胀亡、焦亡等均属于细胞程序性死亡。其中,焦亡是一种依赖含半胱氨酸的天冬氨酸蛋白水解酶(caspase)的细胞程序性死亡方式。近年来,国内外相关研究发现,焦亡与炎性疾病、自身免疫性疾病及肿瘤均有关系。充分了解焦亡发生的机制及其与肿瘤的关系,对肿瘤的治疗具有一定的指导意义。本文针对焦亡的相关机制及焦亡与头颈部肿瘤的相关研究进展进行综述。  相似文献   
9.
NOD样受体蛋白1(NOD-like receptor protein 1,NLRP1)炎性小体在人体固有免疫反应中发挥着重要作用,可促进半胱氨酸蛋白水解酶(cysteinyl aspartate specific proteinases,Caspases)的活化,进一步激活白介素-18和白介素-1β,同时介导细胞焦亡,NLRP1炎性小体在创伤性中枢神经损伤中发挥着作用,本文就NLRP1炎性小体的结构、NLRP1炎性小体在创伤性中枢神经损伤中的激活以及以NLRP1炎性小体为靶点的治疗等方面进行了综述。  相似文献   
10.
目的研究恩格列净(empagliflozin)对db/db小鼠肾脏损伤的保护作用及其潜在作用机制。方法db/db小鼠随机分为糖尿病肾病组(db/db组)和恩格列净治疗组(Empa组,恩格列净10 mg·kg-1·d-1灌胃),C57BL/6J小鼠作为正常对照组。干预3个月,检测血清生化、炎症因子等指标;病理染色观察肾脏病理学改变;检测细胞焦亡相关分子NLRP3、Cleaved Caspase-1、GSDMD的蛋白表达水平。结果与db/db组相比,Empa组空腹血糖、HbA1C、血脂、血清IL-1β、IL-18及ACR明显降低(均P<0.05),病理染色显示Empa组肾小球固缩、肾间质纤维化明显改善,Empa组肾脏组织NLRP3、Cleaved Caspase-1、GSDMD蛋白表达下调(P<0.05)。结论恩格列净可能通过抑制NLRP3/Caspase-1/GSDMD细胞焦亡信号通路而改善糖尿病小鼠肾脏损伤。  相似文献   
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