A STUDY OF C-MYC ONCOGENE EXPRESSION AND AMPLIFICATION IN COLORECTAL CANCER

ＡＳＴＵＤＹＯＦＣ－ＭＹＣＯＮＣＯＧＥＮＥＥＸＰＲＥＳＳＩＯＮＡＮＤＡＭＰＬＩＦＩＣＡＴＩＯＮＩＮＣＯＬＯＲＥＣＴＡＬＣＡＮＣＥＲＷａｎｇＪｉａｎｍｉｎｇ；（王建明）ＬｉＬｉｎｇ；（李凌）ＬｉＳｈｅｎｄｅ；（李申德）ＣｕｉＨｕｉｙｕｎ（崔惠云）ａｎｄ...

Tanshinone ⅡA improves Alzheimer’s disease via RNA nuclearenriched abundant transcript 1/microRNA-291a-3p/member RAS oncogene family Rab22a axis

BACKGROUND Alzheimer’s disease(AD)is a neurodegenerative condition characterized by oxidative stress and neuroinflammation.Tanshinone ⅡA(Tan-ⅡA),a bioactive compound isolated from Salvia miltiorrhiza plants,has shown potential neuroprotective effects;however,the mechanisms underlying such a function remain unclear.AIM To investigate potential Tan-ⅡA neuroprotective effects in AD and to elucidate their underlying mechanisms.METHODS Hematoxylin and eosin staining was utilized to analyze structural brain tissue morphology.To assess changes in oxidative stress and neuroinflammation,we performed enzyme-linked immunosorbent assay and western blotting.Additionally,the effect of Tan-ⅡA on AD cell models was evaluated in vitro using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay.Genetic changes related to the long non-coding RNA(lncRNA)nuclear-enriched abundant transcript 1(NEAT1)/microRNA(miRNA,miR)-291a-3p/member RAS oncogene family Rab22a axis were assessed through reverse transcription quantitative polymerase chain reaction.RESULTS In vivo,Tan-ⅡA treatment improved neuronal morphology and attenuated oxidative stress and neuroinflammation in the brain tissue of AD mice.In vitro experiments showed that Tan-ⅡA dose-dependently ameliorated the amyloid-beta 1-42-induced reduction of neural stem cell viability,apoptosis,oxidative stress,and neuroinflammation.In this process,the lncRNA NEAT1-a potential therapeutic target-is highly expressed in AD mice and downregulated via Tan-ⅡA treatment.Mechanistically,NEAT1 promotes the transcription and translation of Rab22a via miR-291a-3p,which activates nuclear factor kappa-B(NF-κB)signaling,leading to activation of the pro-apoptotic B-cell lymphoma 2-associated X protein and inhibition of the anti-apoptotic B-cell lymphoma 2 protein,which exacerbates AD.Tan-ⅡA intervention effectively blocked this process by inhibiting the NEAT1/miR-291a-3p/Rab22a axis and NF-κB signaling.CONCLUSION This study demonstrates that Tan-ⅡA exerts neuroprotective effects in AD by modulating the NEAT1/miR-291a-3p/Rab22a/NF-κB signaling pathway,serving as a foundation for the development of innovative approaches for AD therapy.

Concomitant epidermal growth factor receptor mutation/c-ros oncogene 1 rearrangement in non-small cell lung cancer: A case report

BACKGROUND Epidermal growth factor receptor(EGFR)mutation and c-ros oncogene 1(ROS1)rearrangement are key genetic alterations and predictive tumor markers for non-small cell lung cancer(NSCLC)and are typically considered to be mutually exc-lusive.EGFR/ROS1 co-mutation is a rare event,and the standard treatment appr-oach for such cases is still equivocal.CASE SUMMARY Herein,we report the case of a 64-year-old woman diagnosed with lung adenocar-cinoma,with concomitant EGFR L858R mutation and ROS1 rearrangement.The patient received two cycles of chemotherapy after surgery,but the disease prog-ressed.Following 1-month treatment with gefitinib,the disease progressed again.However,after switching to crizotinib,the lesion became stable.Currently,crizotinib has been administered for over 53 months with a remarkable treatment effect.CONCLUSION The efficacy of EGFR tyrosine kinase inhibitors and crizotinib was vastly different in this NSCLC patient with EGFR/ROS1 co-mutation.This report will aid future treatment of such patients.

c-Myc、CDK12在胃癌组织中的表达及临床意义

目的 探讨胃癌组织中c-Myc、细胞周期蛋白依赖性激酶12(CDK12)表达及其与患者临床特征及预后的关系。方法 收集80例胃癌患者的胃癌组织和癌旁组织标本,采用免疫组化法检测标本中的c-Myc、CDK12表达水平。比较胃癌组织和癌旁组织中c-Myc、CDK12阳性表达情况;分析胃癌组织中c-Myc、CDK12阳性表达与患者临床病理特征的关系;分析c-Myc与CDK12阳性表达的相关性,胃癌组织中c-Myc、CDK12阳性表达与胃癌患者预后的关系。结果 胃癌组织中c-Myc、CDK12阳性表达率(77.5%、87.5%)均明显高于癌旁组织(13.8%、15.0%)(P<0.05)。不同年龄、性别、肿瘤最大直径患者胃癌组织中c-Myc、CDK12阳性表达率比较差异无统计学意义(P>0.05);中低分化、Ⅲ~Ⅳ期、侵犯浆膜、有淋巴结转移患者胃癌组织中c-Myc和CDK12阳性表达率分别为88.0%、87.0%、88.9%、90.0%和94.0%、92.6%、97.2%、100.0%,均明显高于高分化、Ⅰ~Ⅱ期、未侵犯浆膜、无淋巴结转移患者胃癌组织的60.0%、57.7%、68.2%、70.0%和76.7%、76.9%、79.5%、80.0%(P<0.05)。相关分析发现,c-Myc、CDK12在胃癌组织中的表达呈正相关性(r=0.487,P=0.016<0.05)。胃癌组织中c-Myc、CDK12阳性患者的3年生存率分别为19.4%、21.4%,均明显低于c-Myc、CDK12阴性患者的55.6%、70.0%(P<0.05)。结论 c-Myc、CDK12在胃癌组织中异常高表达,两者呈正相关性,并与肿瘤的TNM分期、分化程度、肿瘤侵袭深度及淋巴结转移有关,对患者的预后有明显影响,通过检测两者水平可能评估胃癌患者的预后。

胃癌模型大鼠胃黏膜组织Cyclin D1、c-Myc、CKIT的表达意义及其与胃癌病变程度的相关性

目的探讨胃癌模型大鼠胃黏膜组织细胞周期蛋白D1(cyclinD1)、c-Myc、CKIT的表达意义及其与胃癌病变程度的相关性。方法选择48只健康成年雌性大鼠,按照随机数字表法将其分为对照组、研究1组、研究2组、研究3组,每组各12只。研究1组、研究2组、研究3组均制备成胃癌模型。对照组给予等量0.9%氯化钠溶液,第24周处死取材;研究1组、研究2组、研究3组制备成胃癌大鼠后分别于第8、16、24周取材。分析各组大鼠一般情况及胃黏膜组织病理切片,采用蛋白质印迹法检测胃黏膜组织Cyclin D1、c-Myc、CKIT蛋白的表达,采用逆转录聚合酶链式反应(RT-PCR)法测定胃黏膜组织Cyclin D1、c-Myc、CKIT mRNA的表达,采用Spearman分析法测定胃黏膜组织Cyclin D1、c-Myc、CKIT表达与胃癌病变程度相关性。结果对照组大鼠胃黏膜完整正常,外膜层、肌层、黏膜下层、黏膜层等结构清晰,且无炎症细胞浸润;研究1组大鼠胃黏膜组织与对照组大鼠接近,不存在炎症细胞,且黏膜腺体结构基本正常;研究2组大鼠胃黏膜组织存在破损,细胞核变大,基底部部分腺体细胞形态异常,存在轻度异型性,为早期胃癌;研究3组大鼠胃黏膜组织增加破损,核质比变大,细胞形态不规则,部分腺体存在扩张,黏膜下层及肌层存在炎症细胞浸润,为胃癌进展期。研究1组、研究2组、研究3组胃黏膜组织Cyclin D1、c-Myc、CKIT蛋白均呈显著高于对照组,差异均有统计学意义(P<0.05),胃黏膜组织Cyclin D1、c-Myc、CKIT蛋白在研究1组、研究2组、研究3组中逐渐升高趋势。研究1组、研究2组、研究3组胃黏膜组织Cyclin D1、c-Myc、CKIT mRNA均呈显著高于对照组,差异均有统计学意义(P<0.05),胃黏膜组织Cyclin D1、c-Myc、CKIT mRNA在研究1组、研究2组、研究3组中逐渐升高趋势。采用Spearman相关性结果分析显示,胃黏膜组织Cyclin D1、c-Myc、CKIT表达与胃癌病变程度呈正相关(r=0.382、0.781、0.993,均P<0.001)。结论胃癌模型大鼠胃黏膜组织Cyclin D1、c-Myc、CKIT呈高表达,其与胃癌病变程度密切相关。

Expressions of oncogenes c-fos and c-myc in skin lesion of cutaneous squamous cell carcinoma

Objective:To explore the expressions of c-fos and c-myc in skin lesion of cutaneous squamous cell carcinoma(CSCC).Methods:Using retrospective analysis.73 cases of CSCC were selected from Department of Dermatology,the Second Affiliated Hospital of Xi'an Jiaotong University.which were removed between January 2000 and January 2012.It was considered as experimental group.Meanwhile.11 cases of normal skin specimens of non tumor patients were selected as control group.The expression level of c-fos and c-myc was compared in the two groups.Results:The expressions of c-fos[72.60%(53/73)]and c-myc[83.56%(61/73)]in experimental group were statistically significant(P≤0.05)compared with control group(0%).Expression of c-myc protein was negatively related to differentiation of CSCC.The difference was statistically significant(X^2=7.26.P=0.001<0.05).While expression of c-fos protein was positively related to differentiation of CSCC.which was statistically significant(X^2=7.47,P=0.0012<0.025).Conclusions:The expression level of c-fos and c-myc can be used as an importan indicator of CSCC differentiation,and it has closely connection with the differentiated degree,which can guide clinical prognosis.

THE EXPRESSIONS OF HBV X GENE AND ets-2, IGF-Ⅰ, c-myc AND N-ras ONCOGENES IN HUMAN HEPATOCELLULAR CARCINOMA AND TUMOR-ADJACENT TISSUES

The expressions of HBV X gene and ets-2, IGF-I, c-myc and N-ras were studied in 7 pairs of human primary hepatocellular carcinoma (PHC) and tumor-adjacent tissues, using RNA hybridization and im-munoblot methods. The results showed that specific 17 and 28 kD HBV X gene products (HBxAg) were existed in a portion of PHC and tumor-adjacent tissues. The 17 kD HBxAg was detected in the sera of 3 patients who also had 17 kD HBxAg in their liver tissues. Multiple expressions of oncogenes such as ets-2, c-myc and N-ras were observed in PHC and tumor-adjacent tissues that had HBxAg expressed, indicating HBxAg might function as a transactivator in the course of intracellular proto-oncogene activation. It is also observed that in some tumor-adjacnet tissues the expressions of ets-2, c-myc and N-ras were higher than those in corresponding PHC. The relationship of HBxAg to the expression of est-2, IGF-Ⅱ, c-myc and their possible roles in the carcinogenesis of PHC are discussed.

鳜弹状病毒N蛋白与鳜c-Myc互作调控谷氨酰胺代谢机制

为了研究鳜弹状病毒(SCRV)如何调控鳜c-Myc(Sc-c-Myc)进而调控谷氨酰胺代谢的分子机制,本研究通过免疫共沉淀联合蛋白质谱寻找可能与Sc-c-Myc互作的病毒蛋白,初步分析确定为核衣壳蛋白(N蛋白);Co-IP结果显示,SCRV的N蛋白与Sc-c-Myc存在相互作用。通过PCR扩增获得了带有Flag标签序列的SCRV-N基因的ORF片段,并构建了SCRV-N蛋白过表达载体pcDNA-N-Flag;将pcDNA-N-Flag质粒转染鳜脑组织细胞系(CPB细胞系),荧光共定位结果显示,Sc-c-Myc与SCRV-N在细胞质内存在共定位现象;通过逆转录实时定量PCR(RT-qPCR)和免疫印记(Western blot)检测转染pcDNA-N-Flag的CPB细胞系中Sc-c-Myc及谷氨酰胺代谢通路关键酶(GLS1、GDH和IDH2)的表达变化,发现Sc-c-Myc、GLS1的转录水平和蛋白水平均显著上调。综上表明,SCRV的N蛋白与Sc-c-Myc互作促进Sc-c-Myc的表达,进而调控宿主细胞谷氨酰胺代谢途径,为SCRV防控提供了新的靶点。

猫CDH1基因在过表达c-MYC成纤维细胞中的表达变化及生物信息学分析

[目的]试验旨在研究骨髓细胞瘤病毒癌基因同源物(myelocytomatosis viral oncogene homolog, c-MYC)对猫成纤维细胞的影响及其与E-钙黏蛋白(cadherin 1,CDH1)基因表达和分子特性的关系,为将其应用于猫肿瘤疾病防治和组织损伤修复提供依据。[方法]通过组织贴壁法对猫胎儿成纤维细胞进行分离培养,利用电转仪将PB-TRE-c-MYC质粒转染至细胞并观察细胞形态,利用实时荧光定量PCR检测CDH1基因的表达情况,并通过生物信息学软件分析CDH1蛋白的理化性质和结构特征。[结果]过表达c-MYC导致细胞形态发生变化,从间质细胞的长梭型向上皮细胞的鹅卵石状发生转变,且使上皮细胞标志基因CDH1的表达极显著上调(P<0.01)。生物信息学分析显示,猫CDH1蛋白有881个氨基酸,其中含量最多的是亮氨酸,定位于细胞膜,存在4个CA结构域,介导细胞与细胞的接触,属于亲水性的酸性蛋白,主要由无规则卷曲组成,可能存在由Sec易位子转运并被信号肽酶Ⅰ(Sec/SPⅠ)切割的信号肽位点。[结论]猫CDH1基因的表达可被外源性重编程因子c-MYC激活,其编码的钙黏蛋白可促进猫胎儿成纤维细胞的间质-上皮转化,以抑制细胞癌化。

基于ERK介导C-Myc/PD-L1协同作用探讨参芪抑瘤方联合顺铂对H22肝癌荷瘤小鼠的抑瘤机制

目的:探讨参芪抑瘤方联合顺铂经ERK介导C-Myc/PD-L1相协途径对H22肝癌荷瘤小鼠的抑瘤作用及其机制。方法:60只SPF级雄性昆明小鼠,采用随机数字表法取10只小鼠作为空白组,其余50只小鼠复制H22肝癌荷瘤小鼠模型,模型复制成功后将模型小鼠随机分为模型组、顺铂组[2.5×10^(-3) g/(kg·3 d)]、参芪抑瘤方低[13.515 g/(kg·d)]、中[27.030 g/(kg·d)]、高剂量[54.060 g/(kg·d)]联合顺铂[2.5×10^(-3) g/(kg·3 d)]组,每组10只,治疗13 d,末次给药24 h后,麻醉处死小鼠,测定小鼠肿瘤抑制率和脾指数、胸腺指数;HE染色观察小鼠肿瘤组织病理学变化;ELISA试剂盒检测肿瘤组织匀浆液中EGF、IFN-γ含量;IHC法和Western blot法检测肿瘤组织中p-ERK1/2、C-Myc、PD-L1蛋白表达;RT-PCR法检测肿瘤组织中ERK、C-Myc、PD-L1mRNA表达水平。结果:与空白组相比,模型组小鼠平均体质量和脾脏指数均降低(P<0.05);与模型组相比,各治疗组肿瘤抑制效果明显,且参芪抑瘤方联合顺铂组以剂量依赖性方式抑制肝癌小鼠肿瘤生长,提高小鼠平均体质量和脾指数、胸腺指数,促进肿瘤细胞坏死,增加坏死面积,降低肿瘤组织中EGF和IFN-γ含量以及p-ERK1/2、C-Myc、PD-L1蛋白表达和ERK、C-Myc、PD-L1 mRNA表达(P<0.05);与顺铂组相比,参芪抑瘤方中、高剂量联合顺铂组治疗效果显著,差异具有统计学意义(P<0.05)。结论:参芪抑瘤方联合顺铂能有效抑制H22肝癌荷瘤小鼠的肿瘤生长,显著下调肿瘤组织中C-Myc与PD-L1蛋白表达,该机制可能通过调控ERK信号通路相关蛋白表达发挥抑瘤作用。

在口腔表皮样癌细胞中c-myc对GS和GLS表达的调控以及对癌瘤生长的裸鼠体内实验研究

目的:用动物实验模型探讨人口腔表皮样癌细胞中c-myc与谷氨酰胺酶(GLS)、谷氨酰胺合成酶(GS)间的相关性。方法:免疫组化检测口腔癌临床样本中c-myc、GLS、GS表达。建立c-myc稳定高表达的KB细胞模型,并移植入裸鼠体内以建立裸鼠成瘤模型,细胞和裸鼠各分为3组(n=6),分别为正常对照组、空载体转染细胞组和c-myc过表达细胞组,观察肿瘤生长;免疫组化检测肿瘤中c-myc、 GLS、 GS的表达情况。结果:c-myc、 GLS、 GS在口腔癌临床样本中高表达;在c-myc高表达细胞模型中c-myc mRNA表达水平显著高于空载体对照组;在动物实验中,随着时间的延长,各组裸鼠成瘤模型均形成肿瘤,c-myc过表达组肿瘤体积及重量增加更为显著(P<0.01);c-myc过表达组瘤组织样本中GLS及GS表达显著高于空载体组和对照组(P<0.01)。结论:在口腔表皮样癌细胞中,c-myc高表达,并使GLS、GS表达升高。

乙肝相关肝癌患者血清中癌基因C-myc、N-ras、PLK1、FGF2蛋白水平对TACE术后预后的预测价值分析

目的探讨乙型肝炎(简称乙肝)相关肝癌患者血清中癌基因[增殖相关基因(C-myc)、转化基因(N-ras)、丝/苏氨酸激酶1(PLK1)、成纤维细胞生长因子2(FGF2)]蛋白水平对肝动脉化疗栓塞术(TACE)后预后的预测价值。方法选取该院于2016年7月至2021年1月收治的乙肝相关肝癌患者127例,根据随访结果将患者分为死亡组和存活组。采用双抗体夹心酶联免疫吸附法测定患者术前血清癌基因C-myc、N-ras、PLK1、FGF2蛋白水平,单因素及多因素Cox分析血清中癌基因C-myc、N-ras、PLK1、FGF2蛋白水平与乙肝相关肝癌患者TACE术后预后的危险因素;通过受试者工作特征曲线来评估血清癌基因C-myc、N-ras、PLK1、FGF2蛋白水平对乙肝相关肝癌患者预后的预测价值,并根据对应的截断值将乙肝相关肝癌患者分为血清中癌基因C-myc、N-ras、PLK1、FGF2蛋白水平高表达组与低表达组,采用Kaplan-Meier生存曲线评估不同血清癌基因C-myc、N-ras、PLK1、FGF2蛋白水平的预后生存情况。结果多因素Cox回归分析结果提示,TNM分期Ⅲ~Ⅳ期(HR=2.998,95%CI:1.239~7.257)、有门静脉转移(HR=3.737,95%CI:1.941~7.193)、有腹腔转移(HR=3.482,95%CI:1.709~7.097)、Child-Pugh分级B级(HR=2.587,95%CI:1.045~6.406)、高血清癌基因C-myc蛋白水平(HR=1.224,95%CI:1.090~1.374)、高血清癌基因N-ras蛋白水平(HR=1.218,95%CI:1.097~1.353)、高血清癌基因PLK1蛋白水平(HR=1.237,95%CI:1.110~1.379)、高血清癌基因FGF2蛋白水平(HR=1.141,95%CI:1.060~1.228)均是影响乙肝相关肝癌患者TACE术后预后的独立危险因素(均P<0.05)。血清癌基因C-myc、N-ras、PLK1、FGF2蛋白水平低表达组的总生存率均明显高于血清癌基因C-myc、N-ras、PLK1、FGF2蛋白水平高表达组,差异有统计学意义(均P<0.001)。结论血清癌基因C-myc、N-ras、PLK1、FGF2蛋白水平对乙肝相关肝癌患者TACE术后预后具有预测价值。

TCGA-based analysis of oncogenic signaling pathways underlying oral squamous cell carcinoma

Background:Oral squamous cell carcinoma(OSCC)represents a prevalent malignancy in the oral and maxillofacial area,having a considerable negative impact on both the quality of life and overall survival of affected individuals.Our research endeavors to leverage bioinformatic approaches to elucidate oncogenic signaling pathways,with the ultimate goal of gaining deeper insights into the molecular underpinnings of OSCC pathogenesis,and thus laying the groundwork for the development of more effective therapeutic and preventive strategies.Methods:Differential expression analysis was performed on mRNA data from tumor and normal tissue groups to identify genes associated with OSCC,using The Cancer Genome Atlas database.Predictions of oncogenic signaling pathways linked to differentially expressedmRNAs were made,and these results were presented visually using R software,using Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichments.Results:GO and KEGG analyses of 2938 differentially expressed genes in OSCC highlighted their significant involvement in various biological processes.Notably,these processes were related to the extracellular matrix,structural organization,connective tissue development,and cell cycle regulation.Conclusions:The comprehensive exploration of gene expression patterns provides valuable insights into potential oncogenic mechanisms in OSCC.

LncRNA CDC6通过抑制c-Myc表达调节肺癌细胞增殖、凋亡和上皮间质转化

目的探讨LncRNA CDC6(CDC6)对肺癌细胞增殖、上皮间质转化(epithelial-mesenchymal transition,EMT)和凋亡的影响及其作用机制。方法RT-qPCR检测肺癌组织和细胞中CDC6和c-Myc的mRNA水平,并分析CDC6和c-Myc mRNA水平与患者临床指标的相关性。随后,通过CDC6-siRNA和pcDNA-CDC6转染,或CDC6-siRNA和pcDNA-c-Myc共转染肺癌细胞;MTT法检测细胞增殖能力;流式细胞术检测细胞凋亡;Western Blotting检测增殖、凋亡及EMT相关蛋白的表达。结果LncRNA CDC6在肺癌组织和细胞系中高表达(P<0.05)。CDC6和c-Myc mRNA水平与肺癌的病理分型、TNM分期、分化程度以及淋巴结的转移密切相关。沉默CDC6抑制肺癌细胞增殖,促进细胞凋亡,降低增殖相关蛋白以及EMT相关蛋白表达水平,促进促凋亡蛋白Bax表达,抑制抗凋亡蛋白Bcl-2表达(P<0.05)。过表达CDC6促进肺癌细胞增殖,抑制细胞凋亡,上调增殖相关蛋白以及EMT相关蛋白表达,减少促凋亡蛋白Bax水平,增加抗凋亡蛋白Bcl-2水平(P<0.05)。过表达c-Myc逆转了沉默CDC6对A549细胞增殖、凋亡以及EMT相关蛋白表达的影响。结论LncRNA CDC6通过调控c-Myc促进EMT过程及肺癌细胞的增殖能力,抑制细胞凋亡。

老年心肌梗死患者外周血单个核细胞中c-fos c-myc表达及临床意义

目的分析老年心肌梗死(MI)患者外周血单个核细胞中c-fos与c-myc表达,并探讨二者与老年MI的关系。方法将78例老年MI患者设为研究1组,73例稳定型心绞痛患者设为研究2组,同期纳入74名健康体检志愿者作为对照组。采用实时荧光定量聚合酶链反应检测三组被试者外周血单个核细胞中c-fos、c-myc水平。采用Pearson法分析c-fos、c-myc与血糖、高密度脂蛋白、三酰甘油的相关性,采用Logistic回归分析探讨MI预后的影响因素。结果研究1组被试者血糖水平高于对照组,三酰甘油水平及c-fos、c-myc水平高于研究2组和对照组,高密度脂蛋白水平低于研究2组和对照组;研究2组被试者高密度脂蛋白水平低于对照组,c-fos、c-myc水平高于对照组(P<0.05)。MI患者外周血单个核细胞中c-fos、c-myc水平与血糖、三酰甘油水平均呈正相关(P<0.01),与高密度脂蛋白呈负相关(P<0.01)。预后不良组患者c-fos、c-myc水平、三酰甘油水平高于预后良好组(P<0.01)。Logistic回归分析结果显示,c-fos、c-myc是影响MI患者预后不良的危险因素(P<0.01)。结论老年MI患者外周血单个核细胞中c-fos、c-myc呈高表达,二者与MI病情发展密切相关,c-fos、c-myc对预测老年MI不良预后具有一定的作用。

胃癌患者血清c-Myc和PD-L1水平与临床病理特征及预后的相关性

目的 探讨胃癌患者血清c-Myc和程序性死亡配体1(programmed death ligand 1,PD-L1)水平与临床病理特征及预后的相关性。方法 收集2018年8月至2019年4月期间96例胃癌患者作为研究对象(观察组),另纳入健康体检者96例为对照组。采用酶联免疫吸附测定法(ELISA)检测血清c-Myc和PD-L1水平。胃癌患者血清中c-Myc和PD-L1表达的相关性采用Spearman相关分析;血清c-Myc和PD-L1表达与患者预后的关系采用Kaplan-Meier法分析;Cox回归分析胃癌患者预后的影响因素。结果 与对照组相比,观察组患者血清c-Myc、PD-L1水平显著升高(P<0.05)。Spearman法分析显示,胃癌患者血清中c-Myc和PD-L1表达呈正相关(r=0.431,P<0.05);c-Myc、PD-L1表达与肿瘤直径、TNM分期、浸润深度、淋巴结转移和分化程度有关(P<0.05)。胃癌组织中c-Myc和PD-L1低表达患者3年累计生存率为88.89%(32/36)、86.67%(26/30),均显著高于高表达患者的76.67%(46/60)、78.79%(52/66)(P<0.05)。多因素Cox回归分析结果显示,c-Myc、PD-L1、TNM分期是影响胃癌患者预后的危险因素(P<0.05)。结论 胃癌患者血清中c-Myc和PD-L1高表达均呈现上调趋势,二者与胃癌患者临床病理特征及预后有关。

Complement factor Ⅰ knockdown inhibits colon cancer development by affecting Wnt/β-catenin/c-Myc signaling pathway and glycolysis

BACKGROUND Colon cancer(CC)occurrence and progression are considerably influenced by the tumor microenvironment.However,the exact underlying regulatory mechanisms remain unclear.AIM To investigate immune infiltration-related differentially expressed genes(DEGs)in CC and specifically explored the role and potential molecular mechanisms of complement factor I(CFI).METHODS Immune infiltration-associated DEGs were screened for CC using bioinformatics.Quantitative reverse transcription polymerase chain reaction was used to examine hub DEGs expression in the CC cell lines.Stable CFI-knockdown HT29 and HCT116 cell lines were constructed,and the diverse roles of CFI in vitro were assessed using CCK-8,5-ethynyl-2’-deoxyuridine,wound healing,and transwell assays.Hematoxylin and eosin staining and immunohistochemistry staining were employed to evaluate the influence of CFI on the tumorigenesis of CC xenograft models constructed using BALB/c male nude mice.Key proteins associated with glycolysis and the Wnt pathway were measured using western blotting.RESULTS Six key immune infiltration-related DEGs were screened,among which the expression of CFI,complement factor B,lymphoid enhancer binding factor 1,and SRY-related high-mobility-group box 4 was upregulated,whereas that of fatty acid-binding protein 1,and bone morphogenic protein-2 was downregulated.Furthermore,CFI could be used as a diagnostic biomarker for CC.Functionally,CFI silencing inhibited CC cell proliferation,migration,invasion,and tumor growth.Mechanistically,CFI knockdown downregulated the expression of key glycolysis-related proteins(glucose transporter type 1,hexokinase 2,lactate dehydrogenase A,and pyruvate kinase M2)and the Wnt pathway-related proteins(β-catenin and c-Myc).Further investigation indicated that CFI knockdown inhibited glycolysis in CC by blocking the Wnt/β-catenin/c-Myc pathway.CONCLUSION The findings of the present study demonstrate that CFI plays a crucial role in CC development by influencing glycolysis and the Wnt/β-catenin/c-Myc pathway,indicating that it could serve as a promising target for therapeutic intervention in CC.

Expressions of vascular endothelial growth factor in cirrhotic tissues and their relations to proto-oncogene c-fos, c-myc

Objective: To investigate the significance of vascular endothelial growth factor (VEGF) in the pathogene- sis of liver cirrhosis and the correlation between VEGF and proto-oncogene c-fos and c-myc in cir- rhotic liver. Methods: The proteins of VEGF, c-fos, and c-myc were identified immunohistochemically in each tissue section of 53 cases of liver cirrhosis. The correlations between VEGF, c-fos and c-myc were analyzed. The levels of VEGF protein in different Child gradings were also compared. Results: The proteins of VEGF were more highly ex- pressed in Child A and B patients than in Child C patients and controls. The expressions of both c-fos and c-myc were not statistically significant between VEGF positive and negative patients. Conclusions: The protein level of VEGF can reflect the compensation status of cirrhosis patients and may act as an anti-cirrhotic factor. The proto-oncogene c- fos, c-myc and VEGF may have different mecha- nisms in the course of cirrhosis or hepatic tumorigen- esis.

THE RELATIONSHIP BETWEEN EXPRESSIONS OF N-myc AND c-myc ONCOGENES IN NEUROBLASTOMA:AN IN SITU HYBRIDIZATION AND IMMUNOCYTOCHEMICAL STUDY

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MicroRNA-330通过靶向SPATS2/c-myc/p21通路调控乳腺癌的增殖

本研究旨在是深入了解微RNA-330(miR-330)在乳腺癌病理下的作用途径,尤其是它如何影响SPATS2/c-myc/p21的通路从而控制乳腺癌的生长,以及miR-330-3p在癌细胞侵入功能上的影响。方法 创建乳腺癌细胞模型,采集了乳腺癌组织样本,并从其中提取了miR-330的表达水平进行数据分析。转染miR-330及其相关质粒,然后检测SPATS2/c-myc/p21通路中相关蛋白的表达,进一步开展了肿瘤增长的试验。考虑到miR-330-3p对癌细胞渗透能力的潜在影响,使用了95D和95C的癌细胞系,对miR-330-3p mimics和inhibitor进行了转染处理,进而检查了细胞的形态特征,并执行了Transwell的细胞侵袭试验,同时也对这些试验结果进行了对比分析。结果 根据研究,miR-330的呈现程度与乳腺癌的差异、大小、其淋巴细胞转移、远处转移以及T分期等方面的临床和病变特点有着显著的关联性。miR-330-3p mimics的研究结果揭示,95D细胞系的细胞浸润能力有所减弱,而miR-330-3p inhibitor对95C细胞系的细胞浸润能力产生了明显的增强效果。这暗示了miR-330-3时p在癌细胞的侵入及其扩散中有潜力扮演关键角色。结论 miR-330主要是利用SPATS2/c-myc/p21这一通道来调节乳腺癌的增长,但miR-330-3p很可能会显著影响癌细胞的渗透性能。因此,miR-330-3p预计将会是未来乳腺癌治疗研究以及临床实际应用中值得关注的潜在治疗目标。