TFF3依赖TWIST1上调TRIB3促结直肠癌转移的机制

目的探讨TFF3基因过表达对结直肠癌HT29细胞增殖、迁移和侵袭能力的影响,以及与癌转移相关的机制。方法构建TFF3过表达的HT29细胞系,qRT-PCR和Western blot法检测TFF3、TWIST1/TRIB3信号通路及上皮间质转化过程中相关mRNA和蛋白的表达,CCK-8法检测HT29细胞增殖能力,细胞划痕实验和Transwell实验评估细胞迁移和侵袭能力,透射电子显微镜观察TFF3过表达前后细胞形态的变化。结果pIRES2-TFF3质粒转染HT29细胞后,相较于对照组,TFF3 mRNA和蛋白表达水平显著升高(P<0.01),细胞增殖、迁移和侵袭能力显著增强(P<0.01),且TWIST1、TRIB3、Vimentin、Snail的表达也显著上升,而E-cadherin的表达则明显下降(P<0.05)。TFF3过表达后的HT29细胞出现了多种变化,如细胞间连接减少、绒毛脱落、伪足形成,以及形态上梭形细胞增多等。结论TFF3过表达可能通过Twist1/TRIB3信号通路促进结直肠癌细胞的EMT过程,从而提高其转移潜力,加速癌症的恶性进展。

Twisted Integration of Complex Oxide Magnetoelectric Heterostructures via Water‑Etching and Transfer Process

Manipulating strain mode and degree that can be applied to epitaxial complex oxide thin films have been a cornerstone of strain engineering.In recent years,lift-off and transfer technology of the epitaxial oxide thin films have been developed that enabled the integration of heterostructures without the limitation of material types and crystal orientations.Moreover,twisted integration would provide a more interesting strategy in artificial magnetoelectric heterostructures.A specific twist angle between the ferroelectric and ferromagnetic oxide layers corresponds to the distinct strain regulation modes in the magnetoelectric coupling process,which could provide some insight in to the physical phenomena.In this work,the La_(0.67)Sr_(0.33)MnO_(3)(001)/0.7Pb(Mg_(1/3)Nb_(2/3))O_(3)-0.3PbTiO_(3)(011)(LSMO/PMN-PT)heterostructures with 45.and 0.twist angles were assembled via water-etching and transfer process.The transferred LSMO films exhibit a fourfold magnetic anisotropy with easy axis along LSMO<110>.A coexistence of uniaxial and fourfold magnetic anisotropy with LSMO[110]easy axis is observed for the 45°Sample by applying a 7.2 kV cm^(−1)electrical field,significantly different from a uniaxial anisotropy with LSMO[100]easy axis for the 0°Sample.The fitting of the ferromagnetic resonance field reveals that the strain coupling generated by the 45°twist angle causes different lattice distortion of LSMO,thereby enhancing both the fourfold and uniaxial anisotropy.This work confirms the twisting degrees of freedom for magnetoelectric coupling and opens opportunities for fabricating artificial magnetoelectric heterostructures.

Valley-dependent transport in a mescoscopic twisted bilayer graphene device

We study the valley-dependent electron transport in a four-terminal mesoscopic device of the two monolayer graphene nanoribbons vertically stacked together, where the intersection forms a bilayer graphene lattice with a controllable twist angle. Using a tight-binding lattice model, we show that the longitudinal and transverse conductances exhibit significant valley polarization in the low energy regime for small twist angles. As the twist angle increases, the valley polarization shifts to the high energy regime. This arises from the regrouping effect of the electron band in the twisted bilayer graphene region. But for relatively large twist angles, no significant valley polarization is observed. These results are consistent with the spectral densities of the twisted bilayer graphene.

Twisted Yangian Y(sp_(2))的单权模

讨论了Twisted Yangian Y(sp_(N))的权模问题,构造了Y(sp_(2))的一类无限维单权模,分类了具有一个一维权空间的Y(sp_(2))单权模.

Comparison between seismic analysis of twisting and regular 52-story towers considering soil-structure interaction

A dynamic analysis of both twisting and regular towers is carried out to determine the results of considering soil-structure interaction(SSI)on high-rise buildings.In addition,the difference between the seismic performance of using twisting towers over regular ones is investigated.The twisting tower is a simulation of the Evolution Tower(Moscow).The towers’skeletons consist of RC elements and rest on a reinforced concrete piled-raft foundation.The soil model is considered as multi-layered with the same soil properties as the zone chosen for the analysis(New Mansoura City,Egypt).The only difference between both towers is their shape in elevation.The whole system is modelled and analyzed in a single step as one full 3D model,which is known as the direct approach in SSI.All analyses are carried out using finite-element software(Midas GTS NX).Dynamic output responses due to three records of seismic loads are proposed and presented in some graphs.Based on the results,it is concluded that SSI has a considerable effect on the dynamic response of tall buildings mainly because of the foundation flexibility,as it leads to lengthening the vibration period,increasing the story drift and the base shear for both cases.

Visualizing the Local Twist Angle Variation within and between Domains of Twisted Bilayer Graphene

Moirésuperlattices in twisted two-dimensional materials have emerged as ideal platforms for engineering quantum phenomena,which are highly sensitive to twist angles,including both the global value and the spatial inhomogeneity.However,only a few methods provide spatial-resolved information for characterizing local twist angle distribution.

Twisted Yangian Y(sp^(2))的一类单权模

研究了Twisted Yangian Y(g_(N))的权模问题,构造了Y(sp^(2))的一类权空间维数均为2的无限维权模,给出了该权模不可约的充分条件.

Twist2表达与卵巢癌脉管浸润及预后的相关研究

目的:分析Twist2与卵巢癌患者的预后及脉管浸润之间的关系,探索Twist2在卵巢癌脉管浸润中的作用及机制。方法:利用KM plotter分析卵巢癌患者中Twist2 mRNA的表达与卵巢癌总生存率(OS)、无进展生存率(PFS)、肿瘤进展后生存率(PPS)的相关性。利用癌症基因组学数据库cBioportal分析卵巢癌患者中Twist2与脉管浸润的相关性。体外实验:采用Transwell检测Twist2对卵巢癌CAOV3细胞[空白组、阴性对照组(siNC组)、siTwist2组]侵袭、迁移能力的影响,并利用实时荧光定量多聚核苷酸链式反应(realtime-PCR)及蛋白免疫印迹(Western blot)检测分别从RNA水平及蛋白水平检测下调Twist2表达后CAOV3细胞中Twist2、血管内皮生长因子C(VEGFC)表达的变化。结果:①KM plotter在线数据分析结果示,Twist2高表达的卵巢癌患者与不良预后有关,OS(HR 1.24,95%CI 1.01~1.52)、PFS(HR 1.39,95%CI 1.14~1.70)及PPS(HR 1.37,95%CI 1.08~1.74)差异均有统计学意义(P<0.05);cBioportal分析示,Twist2 mRNA表达与卵巢癌血管浸润(r=0.93,P=0.001)及淋巴管浸润(r=0.89,P=0.009)均呈正相关。②体外实验Transwell检测示,与空白组和siNC组比较,siTwist2组卵巢癌细胞的侵袭及迁移能力显著下降(P<0.05)。Realtime-PCR及Western blot检测示,与空白组和siNC组比较,siTwist2组中Twist2 mRNA及蛋白、VEGFC mRNA及蛋白的表达均明显下降(P<0.05)。结论:卵巢癌中Twist2的表达与肿瘤预后及脉管浸润密切相关,下调Twist2后,细胞迁移及侵袭穿透的细胞数明显减少、VEGFC表达降低,Twist2可能通过VEGFC来诱导肿瘤细胞侵袭转移参与肿瘤脉管浸润,Twist2可能是未来卵巢癌评估预后及靶向治疗的指标之一。

Wafer-scale 30°twisted bilayer graphene epitaxially grown on Cu_(0.75)Ni_(0.25)(111)

Twisted bilayer graphene(TBG) has been extensively studied because of its novel physical properties and potential application in electronic devices.Here we report the synthesis and characterization of 300 TBG naturally grown on Cu_(0.75)Ni_(0.25)(111) film and investigate the electronic structure by angle-resolved photoemission spectroscopy.Compared with other substrates,our TBG with a wafer scale is acquired with a shorter growth time.The Fermi velocity and energy gap of Dirac cones of TBG are comparable with those of a monolayer on Cu_(0.85)Ni_(0.15)(111).The signature of moré lattices has not been observed in either the low-energy electron diffraction patterns or the Fermi surface map within experimental resolution,possibly due to different Cu and Ni contents in the substrates enhancing the different couplings between the substrate and the first/second layers and hindering the formation of a quasiperiodic structure.

Tubular Heat Enhancement Using Twisted Tape Inserts with Large Holes

Heat augmentation techniques play a vital role in the heating and cooling processes in industries,including solar collectors and many applications that utilize heat exchangers.Several studies are based on inserting fillers inside the tubes to enhance heat transfer.This investigation considered the effects of twisted tapes with large holes on a tubular heat exchanger’s(HX)heat transmission,pressure drop,and thermal boosting factor.In the experimental section,counter-swirl flow generators used twisted tapes with pairs of 1.0 cm-diameter holes and changes in porosity(Rp)at 1.30%and 2.70%.In the experiments,air was utilized as a working fluid in a tube with a circular cross-section.The turbulent flow was considered,with Reynolds numbers(Re)domain from 4800 to 9500,and a boundary condition with a uniform wall heat flux was constructed.The findings expound that when the number of holes rose,the Nusselt number(Nu),the factor of friction(f),and the thermal enhancement factor(η)all increased as well.Additionally,as the friction factor increased,the Nusselt number of the tape-equipped tube was noticeably higher.Additionally,it was discovered that the friction factor was between 70%and 94%lower than the values of the tube without tape,while the(Nu)was between 87%and 97%higher than the conventional tube values.The maximum value ofηis 89%.According to the experimental results,empirical correlations for Nu,f,andηwere also generated.

TWIST1通过激活自噬促进肺动脉高压大鼠模型肺血管重塑作用及机制的实验研究

目的探讨Twist相关蛋白1(Twist-related protein 1,TWIST1)对野百合碱(Monocrotaline,MCT)诱导的肺动脉高压(pulmonary arterial hypertension,PAH)大鼠肺血管重塑的影响及机制。方法将50只健康雄性SD大鼠,随机分为5组,即对照组、模型组、二甲基亚砜(Dimethyl sulfoxide,DMSO)溶剂处理的模型组、TWIST1抑制剂Harmine组、自噬抑制剂羟氯喹组。检测右心室收缩压(RVSP),右心室肥厚指数(RVHI)和内膜厚度百分比(MT%)以评估大鼠PAH的发展。采用免疫印迹法检测TWIST1,自噬相关蛋白LC3B以及RND3的蛋白质水平。结果与对照组比较,MCT诱导的PAH大鼠中TWIST1和LC3B表达增加,分别为对照组的2.32±0.22倍和0.87±0.19倍,差异具有统计学意义(t=15.812,11.227,均P<0.001);同时RND3表达下调,为对照组的0.32±0.07倍,差异具有统计学意义(t=-13.003,P<0.001)。给与TWIST1抑制剂Harmine或自噬抑制剂羟氯喹可显著抑制MCT诱导的自噬激活和RND3表达下调,同时降低了MCT诱导的PAH大鼠的RVSP,RVHI和MT%,差异具有统计学意义(t=-24.277~16.636,均P<0.001)。结论TWIST1通过诱导自噬激活促进肺血管重塑,促进PAH的发生发展。

子宫内膜癌组织CTGF、TWIST1、NCAPH的表达与临床病理特征及预后的关系

目的 探讨子宫内膜癌组织中结缔组织生长因子(CTGF)、TWIST1和非平滑肌细胞凝聚素Ⅰ复合亚单位H(NCAPH)蛋白的表达,以及与肿瘤临床病理特征及患者预后的关系。方法 回顾性分析2017年1月至2019年1月于南通大学附属海安医院行全子宫切除术140例患者的临床资料,其中术后病理证实为子宫内膜癌68例(子宫内膜癌组)、不典型增生42例(不典型增生组)和正常子宫内膜30例(正常组)。采用免疫组化染色法检测3组CTGF、TWIST1和NCAPH蛋白的阳性表达率,分析其与子宫内膜癌患者的肿瘤病理特征和预后的关系。结果 子宫内膜癌组CTGF、TWIST1和NCAPH蛋白的阳性表达率均明显高于不典型增生组和正常组,差异有统计学意义(P<0.05),而不典型增生组和正常组上述指标比较差异无统计学意义(P>0.05)。子宫内膜癌组CTGF、TWIST1和NCAPH蛋白的阳性表达率与患者年龄、肿瘤分化程度和病理类型无相关性(P>0.05),而与肿瘤临床分期、淋巴结转移和肿瘤肌层浸润深度密切相关(P<0.05)。Kaplan-Meier生存分析显示,子宫内膜癌组CTGF、TWIST1和NCAPH阳性表达患者的累积总生存率均明显低于阴性表达患者(P<0.05)。单因素和多因素COX回归分析显示,国际妇产科联盟(FIGO)分期Ⅲ~Ⅳ期、淋巴结转移阳性、CTGF、TWIST1和NCAPH阳性表达是患者死亡的独立危险因素(P<0.05)。结论 子宫内膜癌患者组织CTGF、TWIST1和NCAPH表达上调可能与肿瘤发生和发展密切相关,三者可作为预测生存预后的重要生物标志物。

Twist2、Snail、TPX2、Aurora-A在喉鳞状细胞癌组织中的表达及与临床病理特征的相关分析

目的:探究扭曲蛋白2(Twist2)、转录因子(Snail)蛋白、Xklp2靶蛋白(TPX2)、极光激酶A(Aurora-A)在喉鳞状细胞癌组织中的表达及与临床病理特征的相关分析。方法:选取2021年1月至2023年7月大冶市人民医院收治的喉鳞状细胞癌66例为研究对象,取患者手术切除癌组织和癌旁正常组织分为喉鳞状细胞癌组与癌旁组织组。比较两组Twist2、Snail、TPX2、Aurora-A表达差异,通过ROC曲线分析Twist2、Snail、TPX2、Aurora-A表达诊断喉鳞状细胞癌的价值,并分析Twist2、Snail、TPX2、Aurora-A表达与喉鳞状细胞癌临床病理特征的关系。结果:喉鳞状细胞癌组织中Twist2阳性表达、Snail阳性表达、TPX2阳性表达、Aurora-A阳性均高于癌旁组织(P<0.05)。ROC曲线分析显示,Twist2、Snail、TPX2、Aurora-A表达诊断喉鳞状细胞癌的AUC分别为0.674、0.697、0.818、0.780,均具有较高准确性;诊断敏感度、特异度:Twist2为54.5%、80.3%;Snail为56.1%、83.3%;TPX2为69.7%、93.9%;Aurora-A为63.6%、92.4%,诊断具有一定价值。喉鳞状细胞癌组织中Twist2阳性表达、Snail阳性表达、TPX2阳性表达、Aurora-A阳性均与年龄、性别、临床分型无相关(P>0.05),但喉鳞状细胞癌组织中Twist2阳性表达、Snail阳性表达、TPX2阳性表达、Aurora-A阳性均与甲状软骨累及、TNM分期、分化程度、淋巴结转移、远处转移存在相关(P<0.05)。结论:Twist2、Snail、TPX2、Aurora-A在喉鳞状细胞癌组织中高表达,与患者临床病理特征相关密切,可作为临床诊断喉鳞状细胞癌有效指标。

Linear Functional Equations and Twisted Polynomials

A certain variety of non-switched polynomials provides a uni-figure representation for a wide range of linear functional equations. This is properly adapted for the calculations. We reinterpret from this point of view a number of algorithms.

复方黄柏液激活Notch1/Twist1轴对皮肤溃疡大鼠伤口愈合的影响

目的:探究复方黄柏液对皮肤溃疡大鼠伤口愈合的影响及可能的作用机制。方法:构建皮肤溃疡大鼠模型,并随机分为模型组、复方黄柏液低、中、高剂量组(复方黄柏液L、M、H组)、红霉素软膏组,10只/组;另随机选取10只大鼠作为正常组。复方黄柏液L、M、H组分别给予2.5 ml、5 ml、10 ml复方黄柏液;红霉素软膏组使用棉签将红霉素软膏均匀涂抹在创面;模型组和正常组不给予药物处理。在给药0 d、3 d、7 d和14 d时分别拍照记录大鼠创面愈合情况,并计算创面愈合率。给药14 d时,通过HE、Masson染色法检测大鼠创面组织病理变化及胶原蛋白沉积情况;试剂盒检测创面组织中IL-1β、TNF-α、一氧化氮(NO)及转化生长因子-β(TGF-β)、羟脯氨酸水平;Western blot检测创面组织Notch1、Twist1蛋白表达情况。结果:给药7 d、14 d时,与模型组比较,复方黄柏液L、M、H组和红霉素软膏组大鼠创面愈合率明显提高(P<0.05),且给药14 d时大鼠炎症细胞浸润等现象明显获得改善,大鼠创面胶原蛋白沉积也明显增加。给药14 d时,与正常组比较,模型组大鼠创面组织中IL-1β、TNF-α、NO、羟脯氨酸、TGF-β水平明显升高(P<0.05),Notch1、Twist1蛋白表达明显降低(P<0.05);与模型组比较,复方黄柏液L、M、H组和红霉素软膏组IL-1β、TNF-α、NO水平明显下降(P<0.05),羟脯氨酸、TGF-β水平及Notch1、Twist1蛋白表达明显升高(P<0.05)。结论:复方黄柏液能够通过激活Notch1/Twist1轴促进皮肤溃疡大鼠伤口愈合。

miR⁃32⁃5p通过调节Twist1抑制甲状腺癌细胞的增殖、迁移和侵袭

目的探讨miR-32-5p在甲状腺癌组织中的表达及其对甲状腺癌细胞生物学行为的影响。方法采用实时荧光定量PCR(qPCR)检测甲状腺癌组织和对应癌旁组织中miR-32-5p的表达水平,筛选miR-32-5p高表达的甲状腺癌细胞系TPC-1细胞和低表达的甲状腺癌细胞系KTC-1细胞。采用miR-32-5p inhibitor转染TPC-1细胞(inhibitor-miR-32-5p)和miR-32-5p mimics转染KTC-1细胞(mimics-miR-32-5p),另分别转染无关系列作为阴性对照(inhibitor-NC和mimics-NC)。使用平板克隆形成、CCK-8法检测各组细胞增殖能力,划痕实验、Transwell小室法检测各组细胞迁移、侵袭能力,流式细胞术检测各组细胞凋亡情况,Western blotting检测各组细胞上皮间质转化(EMT)相关蛋白的表达水平。采用荧光素酶报告基因测定Twist1与miR-32-5p的关系;利用转染法分别上调mimics-miR-32-5p-KTC-1细胞及沉默inhibitor-miR-32-5p-TPC-1细胞中Twist1的表达,并检测各组细胞增殖、凋亡、迁移、侵袭能力和EMT相关蛋白的表达水平。结果甲状腺癌组织中的miR-32-5p水平显著低于对应癌旁组织(P<005)。甲状腺癌细胞系中miR-32-5p的表达水平也显著低于正常HTORI-3细胞系,其中TPC-1细胞miR-32-5p表达水平最高,KTC-1细胞miR-32-5p表达水平最低。过表达miR-32-5p后KTC-1细胞96 h的增殖活性、克隆形成能力、细胞迁移及侵袭能力下降,细胞凋亡率上升(P<005),同时EMT标志物E-cadherin表达升高,N-cadherin、Fibronectin、Snail和Vimentin的表达水平下降(P<005)。敲低miR-32-5p后TPC-1细胞96 h的增殖活性、克隆形成能力、细胞迁移及侵袭能力升高,细胞凋亡率下降(P<005),同时EMT标志物E-cadherin表达下降,N-cadherin、Fibronectin、Snail和Vimentin的表达水平上升(P<005)。miR-32-5p可抑制野生型Twist1-3′-UTR的荧光素酶活性(P<005),而对突变型Twist1-3′-UTR的荧光素酶活性无影响(P>005)。通过RNA干扰Twist1后功能学实验验证发现,上调Twist1后可回复miR-32-5p过表达对细胞增殖、凋亡、迁移及侵袭能力的抑制,沉默Twist1后可回复miR-32-5p低表达对细胞增殖、凋亡、迁移、侵袭能力的增强。Western blotting检测结果显示,上调或下调Twist1均可回复miR-32-5p对EMT过程的调控作用。结论miR-32-5p通过靶向Twist1在甲状腺癌中作为肿瘤抑制因子抑制甲状腺癌细胞的增殖、迁移和侵袭。

miR-320a-5p靶向Twist抑制肝细胞癌上皮间质转化

目的探讨miR-320a-5p调控肝细胞癌(HCC)侵袭与转移的生物学功能及其作用机制。方法采用qRT-聚合酶链反应(PCR)检测HCC肿瘤组织、相邻正常组织及肝癌细胞系中miR-320a-5p与癌基因Twist的表达。Pearson相关性分析miR-320a-5p与Twist表达的相关性,双荧光素酶实验证明二者靶向关系。通过CCK8增殖实验、细胞集落形成实验、Transwell、划痕实验分别检测miR-320a-5p对HCC细胞的增殖、活力、侵袭和迁移能力的影响;Western印迹检测Twist蛋白及上皮间质转化(EMT)相关蛋白的表达。结果miR-320a-5p在HCC组织和细胞中表达下调。而过表达miR-320a-5p可抑制HCC细胞的增殖、侵袭和迁移能力及EMT趋势。miR-320a-5p可靶向抑制Twist表达。Twist在HCC肿瘤组织和细胞系中高表达,同时miR-320a-5p可逆转Twist对HCC发展的促进作用。结论miR-320a-5p可通过抑制Twist表达调控HCC细胞的增殖、迁移、侵袭及EMT趋势,从而抑制HCC的发展及转移。

FAK/Twist1信号通路在颅缝闭合过程中的作用机制研究

目的探究FAK/Twist1信号通路在颅缝闭合过程中的作用。方法将10 d大鼠分为对照组(50只)和颅缝旋转组(50只),以大鼠人字缝中点为中心,直径约0.5 cm做一骨窗,将骨瓣在不损伤硬脑膜的情况下游离,对照组骨瓣原位复位,旋转组骨瓣旋转180°后复位,两组大鼠3周后进行实验。旷场试验测试行为学,测量两组体质量、头围、骨瓣面积、骨瓣厚度等生理学指标,显微镜及HE染色观察颅缝闭合情况,Western blot、Real time PCR、免疫组化染色测定骨瓣及骨瓣下硬脑膜FAK/Twist1通过表达情况。结果旋转组骨瓣厚度大于对照组,差异有统计学意义(P<0.01),头围、体质量、骨瓣面积、术区面积无明显差异;显微镜下及HE染色中结果显示:旋转组颅缝完全闭合,对照组颅缝保持正常形态;行为学试验结果显示,颅缝闭合后大鼠行动能力下降且出现抑郁倾向;Western blot、Real time PCR、免疫组化染色显示:旋转组FAK在颅骨和硬脑膜中表达量均高于对照组且差异有统计学意义(P<0.05),旋转组Twist1在硬脑膜中表达量低于对照组且差异有统计学意义(P<0.05),在颅骨中两组Twist1表达量相近,差异无统计学意义。结论颅缝旋转后可以导致颅缝早闭,并会出现行动能力下降等行为学异常,FAK/Twist1可能在颅缝闭合过程中发挥着重要作用。

Ang-2、TWIST表达水平及血小板分布宽度与宫颈癌患者预后的相关性

目的 研究血管生成素(Ang)-2、Twist转录因子(TWIST)表达水平和血小板分布宽度(PDW)与宫颈癌患者预后的相关性。方法 选择150例宫颈癌患者为宫颈癌组;另选择同一时期50例与上述患者年龄相仿的宫颈上皮内瘤病变(CIN)患者作为CIN组;选择50名健康女性作为对照组。应用全自动血细胞分析仪对患者的PDW进行分析,应用免疫组化对患者组织的Ang-2和TWIST表达进行检查。结果 宫颈癌组PDW、Ang-2、TWIST阳性表达率均显著高于CIN组和对照组(P<0.05)。宫颈癌患者的PDW及Ang-2和TWIST表达与患者的脉管浸润、浸润深度、淋巴结转移、病理分级和临床分期具有相关性(P<0.05);经过单因素分析,PDW≥16.47%、Ang-2阳性表达、TWIST阳性表达、浸润深度(>1/2肌层)、淋巴结转移、病理分级(G3)、临床分期(Ⅱa+Ⅱb)与患者的预后不良具有相关性(P<0.05);多因素分析表明PDW>16.47%、Ang-2阳性表达、TWIST阳性表达、淋巴结转移、临床分期(Ⅱa+Ⅱb)是患者预后不良的独立危险因素(P<0.05);PDW≥16.47%和PDW<16.47%、Ang-2阳性和阴性表达、TWIST阳性和阴性表达患者的生存曲线差异具有统计学意义(P<0.05)。结论 Ang-2、TWIST表达水平及PDW是宫颈癌患者的独立预后因素,临床检验Ang-2、TWIST表达水平及PDW对指导患者临床治疗和预后有着积极意义。

Twist1调控Bmi1对胆囊癌细胞侵袭迁移的影响及其机制研究

目的 探讨Twist1对胆囊癌细胞侵袭转移的影响,以及对Bmi1、E-Cadherine、N-Cadherine的调控作用。方法 构建Twist1 shRNA慢病毒载体感染GBC-SD细胞做为实验组,空载慢病毒感染GBC-SD细胞为阴性对照组,不做任何处理的GBC-SD细胞为空白对照组。细胞划痕及Transwell侵袭小室实验检测细胞的迁移及侵袭能力,Western blot及RT-PCR检测Twist1、Bmi1、E-Cadherine及N-Cadherine的蛋白及mRNA的相对表达量。结果 与阴性组、空白组相比,实验组细胞划痕愈合度低、侵袭数少(P <0.000 1),而阴性组及空白组间细胞迁移率、侵袭数比较差异均无统计学意义(P> 0.05)。阴性组及空白组的Twist1、Bmi1、NCadherine的蛋白及mRNA的相对表达量明显高于实验组(P <0.001),而E-Cadherine蛋白及mRNA的相对表达量则明显低于实验组(P <0.000 1),阴性组及空白组组间各蛋白及mRNA的相对表达水平比较差异无统计学意义(P> 0.05)。结论 靶向沉默Twist1可以抑制胆囊癌细胞的迁移侵袭,其机制可能与抑制Bmi1的表达及抑制上皮间质转化过程相关。