长链非编码RNA SLC26A4反义RNA 1通过Notch信号抑制乳腺癌细胞增殖与转移

目的 探讨长链非编码RNA(lncRNA)SLC26A4反义RNA 1(SLC26A4-AS1)在乳腺癌细胞增殖、迁移和侵袭中的作用及潜在生物学机制。方法 2017年6月～2020年12月乳腺癌组织及对应癌旁组织(距离癌组织边缘5 cm以上)40例，采用实时荧光定量PCR(qRT-PCR)技术检测SLC26A4-AS1在乳腺癌组织和细胞系的表达。选择乳腺癌细胞MCF7作为研究对象，将细胞分为control组、pcDNA3.1组、pcDNA3.1-SLC26A4-AS1组和pcDNA3.1-SLC26A4-AS1+Notch激动剂组。qRT-PCR检测SLC26A4-AS1对Notch信号通路中关键因子Notch1和Hes1表达的影响。MTT比色法、划痕实验和Transwell小室实验分别检测细胞增殖、迁移和侵袭能力。结果 SLC26A4-AS1在乳腺癌组织和细胞表达降低。pcDNA3.1-SLC26A4-AS1组Notch1和Hes1的表达量低于pcDNA3.1组，差异有统计学意义(P<0.01)。pcDNA3.1-SLC26A4-AS1组MCF7细胞活力、伤口愈合率和穿膜细胞数...     

lncRNA C5orf66-AS1通过调节CYC1表达对胃癌细胞增殖和转移的影响

目的:探讨长链非编码RNA C5orf66反义链1(lncRNA C5orf66-AS1)对胃癌细胞增殖和转移的影响。方法:以2019年6月—2021年6月收集的63例胃癌患者的癌组织与癌旁组织、人胃黏膜细胞GES-1及胃癌细胞BGC823、SGC7901、AGS、MKN28为研究对象,分别检测组织和细胞中C5orf66-AS1和细胞色素c1(CYC1z)蛋白表达情况。将AGS细胞分为7组,分别检测各组细胞增殖、迁移、侵袭以及细胞中C5orf66-AS1表达水平和CYC1、细胞周期蛋白D1(CyclinD1)、基质金属蛋白酶-2(MMP-2)、MMP-9蛋白表达情况。结果:与癌旁组织比较,胃癌组织中C5orf66-AS1表达降低,CYC1蛋白表达升高(P<0.05)。与人胃黏膜细胞GES-1比较,胃癌细胞BGC823、SGC7901、AGS、MKN28中C5orf66-AS1表达降低,CYC1蛋白表达升高(P<0.05),且AGS细胞中C5orf66-AS1表达最低,CYC1蛋白表达水平最高。沉默C5orf66-AS1促进AGS细胞增殖、迁移、侵袭及CYC1、CyclinD1、MMP-2、MMP-9蛋白表达;过表达C5orf66-AS1抑制AGS细胞增殖、迁移、侵袭及CYC1、CyclinD1、MMP-2、MMP-9蛋白表达;过表达CYC1可逆转C5orf66-AS1对AGS细胞增殖、迁移、侵袭的抑制作用。结论:过表达C5orf66-AS1可能通过下调CYC1抑制AGS细胞增殖、迁移和侵袭。     

LncRNA ZBED3-AS1/miR-339-5p/Notch 1轴调控骨质疏松大鼠成骨细胞增殖分化

目的:探究LncRNA ZBED3-AS1调控miR-339-5p/Notch 1在骨质疏松大鼠成骨细胞增殖分化中的作用。方法:构建假手术（Sham）组和模型（Model）组大鼠模型,对大鼠的骨密度进行检查观测大鼠建模情况。分离大鼠成骨细胞,qRT-PCR检测细胞中ZBED3-AS1、miR-339-5p的表达。对Sh...     

长链非编码RNA氧化应激反应丝氨酸丰富1反义RNA 1对肾癌细胞增殖、迁移及侵袭的影响

目的探讨长链非编码RNA氧化应激反应丝氨酸丰富1反义RNA 1(lncRNA OSER1-AS1)对肾癌ACHN细胞的增殖、迁移、侵袭的影响及其对微小RNA(microRNA,miR)-612的调控作用。方法2017年1月至2020年3月,采用实时定量反转录聚合酶链反应(RT-qPCR)法检测肾癌组织、癌旁组织中OSER1-AS1、miR-612的表达量;体外培养肾癌细胞ACHN,分别将OSER1-AS1小分子干扰RNA(si-OSER1-AS1)及其阴性对照(si-NC)、miR-612寡核苷酸模拟物(miR-612 mimics)及阴性对照mimic NC序列(miR-NC)、si-OSER1-AS1与miR-612特异性寡核苷酸抑制剂的阴性对照(anti-miR-NC)、si-OSER1-AS1与miR-612特异性寡核苷酸抑制剂(anti-miR-612)转染至ACHN细胞;采用RT-qPCR法检测细胞中OSER1-AS1、miR-612的表达量;采用噻唑蓝(MTT)、Transwell小室实验分别检测细胞增殖、迁移及侵袭能力;双荧光素酶报告实验检测OSER1-AS1、miR-612的靶向关系;蛋白质印迹法(Western blot)检测细胞周期蛋白1(Cyclin D1)、基质金属蛋白酶(MMP)-2、MMP-9、p21蛋白表达量。两组间比较采用独立样本t检验,多组间比较采用单因素方差分析。结果肾癌组织OSER1-AS1的表达水平(1.00±0.08比3.37±0.28)高于癌旁组织(t=52.113,P<0.05),miR-612的表达水平(1.00±0.06比0.47±0.04)低于癌旁组织(t=47.062,P<0.05);si-OSER1-AS1组细胞活力(0.66±0.05比0.31±0.03)与Cyclin D1(0.63±0.05比0.25±0.02)、MMP-2(0.82±0.07比0.35±0.03)、MMP-9(0.76±0.06比0.28±0.03)蛋白水平低于si-NC组(t=18.007、21.169、18.514、21.466,P<0.05),si-OSER1-AS1组迁移细胞数[(115.56±9.52)个比(55.99±5.59)个]、侵袭细胞数[(93.41±6.09)个比(46.05±4.35)个]低于si-NC组(t=16.188、18.984,P<0.05),si-OSER1-AS1组p21蛋白水平(0.15±0.02比0.57±0.05)高于si-NC组(t=23.398,P<0.05);miR-612组细胞活力(0.68±0.05比0.39±0.03)与Cyclin D1(0.66±0.05比0.28±0.03)、MMP-2(0.85±0.06比0.46±0.03)、MMP-9(0.78±0.05比0.34±0.02)蛋白水平低于miR-NC组(t=14.920、19.551、17.441、24.512,P<0.05),miR-612组迁移细胞数[(118.76±9.87)个比(64.39±4.65)个]、侵袭细胞数[(99.65±9.12)个比(53.57±3.67)个]低于miR-NC组(t=14.950、14.062,P<0.05),miR-612组p21蛋白水平(0.14±0.02比0.51±0.04)高于miR-NC组(t=24.820,P<0.05);双荧光素酶报告实验证实OSER1-AS1可靶向结合miR-612;抑制miR-612表达可明显逆转干扰OSER1-AS1对细胞增殖、迁移及侵袭的作用。结论干扰OSER1-AS1可通过上调miR-612的表达从而抑制肾癌ACHN细胞增殖、迁移及侵袭。     

外泌体LncRNA SPINT1-AS1在甲状腺乳头状癌中的诊断价值

目的:本文旨在探讨外泌体源性LncRNA SPINT1-AS1在甲状腺乳头状癌（papillary thyroid carcinoma,PTC）诊断和预后判断中的价值。方法:采用qRT-PCR检测SPINT1-AS1在PTC组织、细胞系（TPC-1、BCPAP、K1和IHH4）和患者血清外泌体及癌旁正常组织、人甲状腺正...     

LncRNA FGD5-AS1靶向miR-103a-3p对IL-1β诱导的关节软骨细胞凋亡的机制研究

目的探讨LncRNA FGD5-AS1靶向miR-103a-3p对IL-1β诱导的关节软骨细胞损伤及细胞凋亡的影响与分子机制。方法体外培养大鼠关节软骨细胞,分为NC组、IL-1β组(IL-1β浓度为10 ng/m L)。采用qRT-PCR检测细胞中FGD5-AS1、miR-103a-3p的表达水平。分别将pc DNA-FGD5-AS1、miR-103a-3p mimics转染至软骨细胞,随后使用IL-1β处理48 h。采用ELISA检测IL-6、TNF-α、IL-8水平;流式细胞术检测细胞凋亡率;双荧光素酶报告实验验证FGD5-AS1与miR-103a-3p的靶向关系; Western blot检测Bax、Cyt C、Cleaved Caspase-3、p-NF-κB p65、p-IκBα蛋白表达量。结果与NC组相比,IL-1β组软骨细胞中FGD5-AS1的表达水平显著降低(P0.05),miR-103a-3p、Bax、Cyt C、Cleaved Caspase-3的表达水平显著升高(P0.05),IL-6、TNF-α、IL-8水平显著升高(P0.05),细胞凋亡率显著升高(P0.05); FGD5-AS1过表达后可明显降低IL-6、TNF-α、IL-8、p-NF-κB p65、p-IκBα水平(P0.05),降低细胞凋亡率(P0.05),抑制Bax、Cyt C、Cleaved Caspase-3表达(P0.05);双荧光素酶报告实验证实FGD5-AS1靶向结合miR-103a-3p并可负向调控miR-103a-3p的表达(P0.05); miR-103a-3p过表达可明显逆转FGD5-AS1过表达对细胞凋亡及炎症反应的抑制作用(P0.05)。结论 LncRNA FGD5-AS1可通过靶向负调控miR-103a-3p的表达从而抑制IL-1β诱导的关节软骨细胞炎症反应及细胞凋亡,其作用机制可能通过抑制NF-κB信号通路激活有关。     

长链非编码RNA CBR3-AS1在胆管癌中的表达及其临床意义

目的:探讨长链非编码RNA CBR3-AS1(lncRNA CBR3-AS1)在胆管癌(CCA)中表达状态及其临床意义。方法:用qRT-PCR检测lncRNA CBR3-AS1在CCA组织与癌旁组织以及CCA细胞与正常胆管上皮细胞中的表达,分析lncRNA CBR3-AS1表达与CCA患者临床病理参数及生存率的关系。将胆管癌细胞分别转染lncRNA CBR3-AS1过表达质粒(过表达组)、阴性对照质粒(对照组)及lncRNA CBR3-AS1沉默序列(沉默组),用MTT实验与Transwell实验检测各组细胞的增殖与侵袭能力。结果:lncRNA CBR3-AS1的表达在胆管癌组织中明显高于癌旁组织,在胆管癌细胞系中明显高于正常胆管上皮细胞(均P0.01)。lncRNA CBR3-AS1表达与CCA患者淋巴结转移、TNM分期和术后复发明显有关(P0.05)。lncRNA CBR3-AS1高表达患者总生存率明显低于lncRNA CBR3-AS1低表达患者(P=0.004)。lncRNA CBR3-AS1表达(P=0.020)与TNM分期(P=0.014)是影响CCA患者总生存率的独立危险因素。与对照组CCA细胞比较,过表达组CCA细胞增殖与侵袭能力明显增高,沉默组CCA细胞增殖与侵袭能力明显降低(均P0.05)。结论:lncRNA CBR3-AS1在胆管癌中表达升高,升高的lncRNA CBR3-AS1与CCA的恶性临床病理特征及患者的不良预后密切相关。     

沉默lncRNA ST7-AS1通过Wnt/β-catenin信号通路对肝癌细胞增殖、迁移和侵袭影响的实验研究

目的：探讨沉默长链非编码RNA(lncRNA)致癌性抑制基因7反义RNA1(ST7-AS1)通过Wnt/β-连环蛋白（β-catenin）信号通路对肝癌细胞增殖、迁移和侵袭的影响。方法：肝癌细胞系HCCLM3分成Control组、Vector组、ST7-AS1组、sh-NC组、sh-ST7-AS1组和sh-ST7-AS1+Wnt/β-catenin通路激动剂（SKL2001）组。结果：与Control组比较,ST7-AS1组HCCLM3细胞的吸光度（A570）值及N-钙黏蛋白（N-cadherin）、波形蛋白（Vemintin）、Wnt1和β-catenin的表达升高,克隆数量和迁移、侵袭数目增多,上皮细胞钙黏蛋白（E-cadherin）和GSK-3β的表达降低（P<0.05）。Wnt/β-catenin通路激动剂SKL2001可部分逆转沉默ST7-AS1对HCCLM3细胞增殖、迁移、侵袭的影响（P<0.05）。结论：沉默ST7-AS1可通过抑制Wnt/β-catenin信号通路激活抑制肝癌细胞增殖、迁移和侵袭。     

Ⅰ型骨质疏松症患者长链非编码RNA WT1-AS与骨密度关系

目的 探讨Ⅰ型骨质疏松症（OP）患者血清长链非编码RNA（lncRNA）WT1-AS水平与骨密度（BMD）及骨代谢指标的相关性。 方法 纳入2018年9月—2020年9月恩施土家族苗族自治州中心医院收治的女性Ⅰ型OP患者108例（OP组）,同期绝经后骨量减少者114例（骨量减少组）以及同期年龄相符的绝经后非OP女性120例（对照组）。采用实时荧光定量聚合酶链式反应（qRT-PCR）测定研究对象血清lncRNA WT1-AS水平,采用酶联免疫法测定骨代谢指标,包括血清骨钙素（OCN）、β-胶原降解产物（β-CTX）和Ⅰ型原胶原N端前肽（PINP）。采用Pearson法分析OP患者血清lncRNA WT1-AS与BMD及骨代谢指标相关性,采用logistic回归法分析影响OP发生的因素;采用受试者工作特征（ROC）曲线分析血清lncRNA WT1-AS对OP的诊断价值。沉默大鼠前成骨细胞的lncRNA WT1-AS表达,观察lncRNA WT1-AS对前成骨细胞分化和矿化的作用。 结果 与对照组和骨量减少组相比,OP组OCN水平降低,β-CTX、PINP水平和lncRNA WT1-AS相对表达量升高,差异均有统计学意义（P＜0.05）。OP患者血清lncRNA WT1-AS水平与BMD（L_1~4和股骨颈）、OCN水平呈负相关（r=-0.542、-0.557、-0.608）,与β-CTX、PINP水平呈正相关（r=0.576、0.595）。血清lncRNA WT1-AS水平是影响OP发生的危险因素。血清lncRNA WT1-AS水平诊断OP的ROC曲线下面积（AUC）为0.796,特异度为92.11%,灵敏度为62.96%。沉默大鼠前成骨细胞的lncRNA WT1-AS表达,可促进矿化结节生成。 结论 Ⅰ型OP患者血清lncRNA WT1-AS异常高表达与BMD、骨代谢有关,且影响Ⅰ型OP的发生,对OP具有一定的诊断价值。     

LncRNA NUTM2A-AS1调控miR-183-5p/TGFα影响骨关节炎软骨细胞增殖、凋亡的研究

目的 探讨LncRNA NUTM2A-AS1对白细胞介素-1β（IL-1β）诱导的软骨细胞损伤的影响及分子机制。方法 将软骨细胞随机分为对照组、模型组（5 μg/L的IL-1β）、miR-183-5p+模型组、miR-NC+模型组、si-LncRNA NUTM2A-AS1+模型组、si-TGFα+模型组、si-NC+模型组、pcDNA-TGFα+si-LncRNA NUTM2A-AS1+模型组、pcDNA+si-LncRNA NUTM2A-AS1+模型组;运用实时荧光定量PCR（RT-qPCR）检测LncRNA NUTM2A-AS1、miR-183-5p和TGFα mRNA的表达水平;运用细胞计数试剂盒8（CCK-8）检测细胞活性;运用流式细胞术检测软骨细胞凋亡情况;通过酶联免疫吸附法（ELISA）检测TNF-α、IL-6水平;通过双荧光素酶报告实验检测NUTM2A-AS1、miR-183-5p、TGFα之间的靶向关系。结果 IL-1β诱导的软骨细胞中LncRNA NUTM2A-AS1和TGFα表达升高,miR-183-5p表达降低,软骨细胞活性降低,而凋亡率升高,TNF-α、IL-6水平升高。低表达LncRNA NUTM2A-AS1、低表达TGFα或过表达miR-183-5p后可促进细胞增殖及抑制细胞凋亡、炎症反应。结论 低表达LncRNA NUTM2A-AS1通过调控miR-183-5p/TGFα抑制IL-1β诱导的软骨细胞凋亡及炎症反应,促进细胞存活。     

Exploration the potential mechanism of the SIRT1 and its target gene FOXO1/PPARGC1A in uteropelvic junction obstruction

BackgroundUteropelvic junction obstruction (UPJO) is a common surgical condition, which refers to the blockage of urine flowing through kidney into proximal upper ureter. However, the underlying mechanism of UPJO is poorly understood, especially the regulated and targeted genes of sirtuin 1 in UPJO.MethodsWe sequenced three renal tissues on the obstructed side of independent children with <20% differential renal function (DRF) and three samples with >40% DRF. Gene expression values were obtained and compared for differentially expressed genes (DEGs). Protein-protein interaction (PPI) analysis was conducted to identify the overlapping proteins of DEGs and Sirtuin 1 (SIRT1). The co-expression genes of overlapped genes were computed using Pearson correlation coefficient. The potential role of SIRT1 gene in UPJO was explored by resequencing 3 microarray data from RNA interference (RNAi) SIRT1 lines of renal tubular epithelial (NRK52E) cells in rat and three control datasets were sequenced again. The DEGs were obtained as parallel. GO/KEGG enrichment analysis and co-expression network were conducted to explore the underlying mechanism, particularly shared pathways or function in GO/KEGG enrichment analysis results.ResultsA total of 427 up-regulated genes and 1,099 down-regulated genes were identified among 3 mRNA-seq of renal tissue on the obstructed side of the independent children with <20% DRF and 3 samples with >40% DRF. According to prediction using the Search Tool for Retrieval of Interacting Genes/Proteins, 2 PPIs, FOXO1 and PPARGC1A, were identified among 2,524 DEGs, predicted as targets of SIRT1. Gene set enrichment analysis (GSEA) of their co-expression genes showed they may co-participate in biological activities including fatty acid degradation, regulation of signal transduction by p53 mediator. Moreover, GSEA results of DEGs was confirmed through RNAi SIRT1 lines of rat renal tubular epithelial (NRK52E) cells.ConclusionsUPJO may cause abnormal phenotypic changes of renal tubular epithelial cells through SIRT1/FOXO1 mediated protein transport, establishment of protein localization, and intracellular transport. In addition, UPJO is involved in regulation of signal transduction, regulation of intracellular estrogen receptor signaling pathways, and nucleoprotein localization through SIRT1/PPARGC1A-mediated p53 mediators, causing abnormal phenotypic changes in renal tubular epithelial cells.     

Genetic polymorphisms of CYP1A1, CYP2E1, GSTM1, and GSTT1 associated with head and neck cancer

BACKGROUND: Alcohol intake and tobacco smoke, in addition to other environmental and genetic factors, have been associated with head and neck cancer. We evaluated the role of metabolic enzyme polymorphisms on the risk of head and neck cancer in a hospital-based case-control study. METHODS: CYP1A1MspI, CYP2E1PstI, GSTM1, and GSTT1polymorphisms were evaluated in 103 histologically confirmed head and neck cancer cases and 102 controls by means of polymerase chain reaction-restriction fragment length polymorphism methods. RESULTS: GSTM1null increased the risk of head and neck cancer (odds ratio [OR], 2.2; 95% confidence interval [95% CI], 1.24-3.79), oral cancer (OR, 2.8; 95% CI, 1.28-5.98), and pharyngeal cancer (OR, 2.2; 95% CI, 1.08-4.63). CYP2E1PstI polymorphism indicated a risk for oral cancer (OR, 3.6; 95% CI, 1.29-11.56). The joint effect of GSTM1 null and CYP1A1 polymorphism increased the risk of head and neck cancer (OR, 2.4; 95% CI, 1.13-5.10). CONCLUSIONS: GSTM1 null alone or associated with CYP1A1 increased the risk of head and neck cancer; the CYP2E1PstI mutated allele increased the risk for only oral cancer.     

老年大鼠阴茎海绵体中P-Erk1/2和P-Akt1激酶的表达

目的:一氧化氮(NO)是阴茎勃起的关键因子,其生成主要由一氧化氮合酶(NOS)调节,而磷酸化Erk1/2(P-Erk1/2)和磷酸化Akt1(P-Akt1)均能调节一氧化氮合酶(NOS)的表达及活性从而影响阴茎勃起。本实验研究P-Erk1/2和P-Akt1激酶在老年大鼠阴茎海绵体中的表达,探讨其在老年大鼠勃起功能障碍(ED)发生中的可能作用。方法:A组(2月龄)和B组(18月龄)雄性SD大鼠各10只,测其血清睾酮(T),免疫组化和RT-PCR方法检测大鼠阴茎海绵体中P-Erk1/2和P-Akt1的表达水平。结果:血清T值在B组[(4.73±0.94)nmol/L]较A组[(9.57±1.57)nmol/L]显著下降(P<0.05)。P-Erk1、P-Erk2的mRNA和P-Erk1/2蛋白的相对表达量(积分光密度值IA)在B组(0.95±0.06、0.92±0.05、32.09±8.45)较A组(0.47±0.09、0.61±0.11、7.50±1.81)显著升高(P<0.05);P-Akt1的mRNA和P-Akt1蛋白的相对表达量在B组(0.94±0.05、10.93±3.06)与A组(0.97±0.04、11.67±5.61)无显著差异(P>0.05)。结论:P-Erk1/2的过表达可能是老年性ED发生的机制之一。     

急性胰腺炎肺损伤大鼠肺组织肿瘤坏死因子受体-1与窖蛋白-1的表达及清胰汤的治疗作用

目的 观察肿瘤坏死因子受体-1(TNFR-1)和窖蛋白-1(Cav-1)在急性胰腺炎肺损伤大鼠肺组织的表达及功能,探讨清胰汤的可能作用机制.方法 Wistar大鼠随机分为假手术组、模型组、地塞米松治疗组、清胰汤治疗组.经胰胆管逆行注射脱氧胆酸钠建立大鼠急性胰腺炎肺损伤模型.24 h后采血和肺组织,检测血清淀粉酶、肺湿/干重比值和肺组织病理切片判定损伤程度;放免法检测血清肿瘤坏死因子-α(TNF-α)水平;逆转录-聚合酶链反应(RT-PCR)和Western blot分别检测肺组织中TNFR-1和Cav-1的mRNA及蛋白表达.结果 模型组血清淀粉酶、肺湿/干重比值、血清TNF-α(4.82±0.14比2.96±0.30,P＜0.01)和肺组织病理损伤程度均明显升高;肺组织TNFR-1的mRNA表达上调(1.29±0.15比0.43±0.05,P＜0.01),而Cav-1的mRNA表达则下调(1.14±0.10比2.00±0.10,P＜0.01);脂筏内外表达的TNFR-1均升高,尤以脂筏内升高明显,而Cav-1则表达下降.与模型组比较,地塞米松和清胰汤组的血清淀粉酶、肺湿/干重比值、血清TNF-α(地塞米松组:3.79±0.11,清胰汤组:3.66±0.10,模型组:4.82±0.14,P＜0.01)和肺组织病理损伤程度均下降;肺组织TNFR-1的mRNA表达下降(地塞米松组:0.48±0.01,清胰汤组:0.49±0.02,模型组:1.29±0.15,P＜0.01),而Cav-1的mRNA则表达升高(地塞米松组:1.66±0.06,清胰汤组:1.52±0.04,模型组:1.14±0.10,P＜0.01);脂筏内外表达的TNFR-1均下降,而Cav-1则上升.结论 TNF-α/TNFR-1的表达增加和Cav-1表达的下降与急性胰腺炎肺损伤密切相关.地塞米松和清胰汤都能够明显降低TNFR-1的表达并上调Cav-1的表达,有效减轻肺损伤程度,这可能是清胰汤治疗急性胰腺炎肺损伤的作用机制之一.     

Persistent phosphorylation of NKCC1 and WNK1 in the epicenter of the spinal cord following contusion injury

Background contextNKCC1 regulates neuronal homeostasis of chloride ions and mediates GABAergic activities in nociceptive processing. WNK1 is an upstream regulator of NKCC1 and acts via SPAK (STE20/SPS1-related proline/alanine-rich kinase) and oxidative stress-responsive kinase 1. NKCC1 activity has been shown to be important in edema formation and nociception following spinal cord injury (SCI).PurposeTo determine the role of NKCC1 and WNK1 in spinal cord tissues in the acute and chronic phases following contusional SCI.Study designAn experimental study investigating the phosphorylation profile of an important Cl-regulatory protein Na+-K+-Cl? cotransporter 1 (NKCC1) and its regulatory-kinase WNK1 (kinase with-no-lysine).MethodsSprague-Dawley rats underwent a contusive SCI at T9. The epicenter spinal cord tissues were harvested at Days 1, 3, and 7 for acute phase of injury or Days 35 and 42 in the chronic phase of injury. Western blot was used to compare phosphorylated levels of both NKCC1 and WNK1 in injured tissues compared with those of sham.ResultsA sustained increase in phosphorylation of NKCC1 and WNK1 was detected in the lesion epicenter in spinal cord during both acute and chronic phases following SCI.ConclusionsThese results suggest that persistent activation of NKCC1 and WNK1 may play an important role in SCI.     

Evaluation of p21WAF1/CIP1 and cyclin D1 expression in the progression of superficial bladder cancer

Immunoreactivity of p21^WAF1/CIP1 and cyclin D₁ proteins was assessed in a cohort of 207 patients with superficial (pTa-pT₁) bladder cancer followed up for a mean of 4.9 years. The results of the immunostainings were compared with T category, WHO grade, tumor cell proliferation rate (MIB-1 score), the expressions of p53 and bcl-2 as well as survival. Sixty-eight percent and 75% of the tumors were p21^WAF1/CIP1 positive (≥5% of cells positive) and cyclin D₁ positive (≥10% of cells positive), respectively. The p21^WAF1/CIP1 expression was related to cyclin D₁ immunolabelling (P < 0.001) but not to the other variables studied. The expression of cyclin D₁ was inversely associated with T category (P=0.001), WHO grade (P=0.006), MIB-1 score (P=0.014), p53 expression (P=0.001), and bcl-2 (P=0.011) immunoreactivity. In univariate analysis, T category (P=0.0001), WHO grade (P < 0.0001), MIB-1 score (P < 0.0001), bcl-2 (P=0.0092), p53 (P=0.0016) and p21^WAF1/CIP1 (P=0.009) expressions were significant prognostic factors with regard to tumor progression, whereas cyclin D₁ was without any prognostic significance (P=0.1). Out of 123 p21 positive tumors 21 progressed, whereas only 2 out of 58 p21 negative tumors progressed. In multivariate analysis, the MIB-1 score was the only independent predictor of cancer-specific survival (P=0.03), whereas tumor grade (P=0.002) and cyclin D₁ expression (P=0.04) were independent predictors of tumor recurrence. Only the WHO grade (P=0.04) retained its prognostic value indicating the risk of progression. We suggest that in superficial bladder cancer p21^WAF1/CIP1 and cyclin D₁ immunohistochemistry provide no additional prognostic information compared with already established prognostic factors for predicting the risk of progressive disease. Received: 13 September 1999 / 22 March 2000     

内皮细胞分化基因-1和丝切蛋白-1在原发性肝细胞癌中的表达及其与预后的关系

目的 探讨内皮细胞分化基因-1(EDG-1)、丝切蛋白-1(CFL-1)在原发性肝细胞癌(HCC)中的表达水平及其与临床病理特征和两者之间的相互关系.方法 采用免疫组织化学方法,检测EDG-1、CFL-1在57例原发性肝细胞癌组织(实验组)及15例癌旁组织(对照组)中的表达,并与临床病理资料进行比较分析.随访所有病例术后的生存时间,并进行生存分析.结果 EDG-1 、CFL-1阳性表达分别为54.4％ (31/57)和66.7％ (37/57),均明显高于正常肝组织的表达,差异有统计学意义(P＜0.05),且呈正相关(P＜0.05).EDG-1、CFL-1在肿瘤转移组及低分化组中的表达阳性率明显高于无肿瘤转移组及高+中分化组,差异有统计学意义(P＜0.05).COX多因素回归分析的结果提示,肿瘤转移、癌栓、病理分型、EDG-1及CFL-1的表达为影响预后的独立因素.结论 EDG-1 、CFL-1可能作为判断HCC恶性程度的预测指标,其表达水平有助于评价肝细胞癌患者的预后.     

手术创伤中腹膜组织Sp1、COL1A1和TIMP-1的表达

目的　探讨人手术创伤腹膜组织中核转录因子Sp1激活 ,COL1A1和TIMP 1表达变化与腹膜纤维化之间的关系。方法　采用凝胶电泳迁移率改变分析法 (EMSA)检测手术创伤后不同时间的腹膜组织核转录因子Sp1的表达水平 ,WesternBlot检测COL1A1和TIMP 1蛋白表达 ,Masson染色观察腹膜组织中胶原纤维的变化。结果　Sp1在手术创伤后 0 .5h被活化 ,随着手术时间延长Sp1活性逐渐增强 ,至创伤后 4h时达高峰 ,同时创伤腹膜组织中的COL1A1和TIMP 1蛋白表达水平逐渐升高 ,存在差异显著性 (P <0 .0 1)。在手术创伤期内随手术时间的延长腹膜组织中胶原纤维增加。结论　核转录因子Sp1活化导致Ⅰ型胶原合成增加 ,细胞外基质降解减少 ,从而启动腹膜纤维化进程。