简介:Prostatecancergene3(PCA3,alsoknownasDD3)isanewbiomarkerthatcouldimprovetheaccuracyofprostatecancerdiagnosis.Itisagreatbiomarkerwithfairlyhighspecificityandsensitivity.Theincidenceofprostatecancerisrisingsteadilyinmostcountries.Thecommonlyusedprostate-specificantigen(PSA)testoncegavepeoplehopeforearlydiagnosisofprostatecancer.However,thelowspecificityofthePSAtesthasresultedinalargenumberofunnecessarybiopsiesandovertreatment.Duringthepastdecade,manynewprostatecancerbiomarkershavebeenfound.Amongthese,PCA3isthemostpromising.Duetoitsgreatperformanceindistinguishingprostatecancerfromotherprostateconditions,PCA3couldlikelybeappliedforearlydiagnosisofprostatecancer,patientfollow-up,prognosisprediction,andtargetedtherapy.Afteryearsofresearch,wehaveobtainedsomeknowledgeaboutthesequenceofPCA3gene.WehavealsodeterminedtherelationshipbetweenPCA3andtheproliferationofprostatecancercellsandlearnedsomeinformationabouthowPCA3affectstumor-relatedgenesandproteins.APCA3scorehasbeencreated,andithasbeenusedinavarietyofstudies.SomeresearchershaveevenappliedPCA3totargetedtherapyandobtainedagoodeffectinvitro.Thisreviewdescribesthecurrentstateofresearch,andexploresthefutureprospectsforPCA3.更多还原
简介:Forelectronicmicroscopicobservation,wefoundSSV-transformedNIH3T3cellsweredifferentfromnon-transformedcells.InSSV-transformedNIH3T3cellsnucleicytoplasmaratiowasincreasedandincytoplasmatheribosomes(polyribosomeswereattachedtotheswollenroughendoplasmicreticulum.Itwaslikelythatribosomeswerelinedtogetherfunctionallyandstructionallytoproducespecificprotein(PDGF-likeprotein).
简介:目的构建大鼠神经营养因子3(NT-3)基因真核表达载体并观察其在真核细胞内的表达情况。方法采用逆转录聚合酶链式反应(RT-PCR)技术从大鼠脑组织总RNA中扩增NT-3基因cDNA序列,将其克隆到真核表达载体pcDNA3中,经酶切鉴定和序列分析后,以阳离子脂质体Li-pofectamine2000介导转染L929细胞,应用免疫细胞化学和westernblot鉴定NT-3在细胞内的表达。结果RT-PCR产物为822bp的特异片段,重组质粒pcDNA3/NT-3酶切后产生822bp和5.2kb的片段,DNA测序证实822bp片段的碱基序列与大鼠NT-3基因序列完全一致,成功构建了pcDNA3/NT-3重组质粒。将其转染真核细胞后,免疫细胞化学、westernblot结果表明NT-3能在真核细胞中正确表达。结论成功构建了重组真核表达质粒载体pcDNA3/NT-3,为后续的研究奠定基础。
简介:Objective:ToexploretheeffectsofnuclearM-CSFontheprocessoftumorigenesis.Methods:FunctionalpartofM-CSFcDNAwasinsertedintoaneukaryoticexpressionplasmidpCMV/myc/nuc,whichcanaddthreeNLStotheC-terminaloftheexpressedproteinanddirecttheproteinintothecellnuclei.TheconstructedplasmidwastransferredintoNIH3T3cellsandthecellcloneswereselectedbyG-418selection.CellclonesstableexpressingtargetproteinwereidentifiedbyRT-PCR,ABCimmunohistochemistryassayandWesternblot.Cellgrowthkineticsanalysesthroughgrowthcurves,celldoublingtime,MTTtestandanti-senseoligodeoxynucleotide(ASODN)inhibitingcellgrowthtestwereperformedtoidentifycellsproliferationpotential.Results:Thetransfectedcellsshowedelevatedproliferationpotentialoverthecontrolcells.Conclusion:AbnormalappearanceofM-CSFinnucleuscouldenhancecellproliferation,whichsuggeststhatcytokineisoformswithincellnucleusmightplaytranscriptionfactor-likerole.
简介:目的:探讨14—3—3β基因(酪氨酸3-加单氧矽色氨酸5-加单氧酶激活蛋白基因)对卡波氏肉瘤(Kaposigsarcoma,KS)细胞迁移的影响。方法:采用脂质体法将14—3—3β基因稳定转染入BCBL—1(HHV-8positiveandEBVnegativehumanBcells)细胞,Western—Blot检测14—3—3β蛋白的表达,最后利用Transwell法分析14—3—3β基因对BCBL-1细胞迁移的影响(设立空载体组和阴性对照组)。结果:pcDNA3.1/myc—His(-)A-14—3—3β组细胞迁移数目明显高于pcDNA3.1/myc—His(-)A组和阴性对照组,差异具有统计学意义(P〈0.05);pcDNA3.1/myc—His(-)A组和阴性对照组细胞迁移数目相比差异无统计学意义(P〉0.05)。结论:14—3—3β基因能促进KS细胞的迁移。
简介:AbstractImmunotherapy that targets checkpoints, especially programmed cell death protein 1 and programmed cell death ligand 1, has revolutionized cancer therapy regimens. The overall response rate to mono-immunotherapy, however, is limited, emphasizing the need to potentiate the efficacy of these regimens. The functions of immune cells are modulated by multiple stimulatory and inhibitory molecules, including lymphocyte activation gene 3 (LAG-3). LAG-3 is co-expressed together with other inhibitory checkpoints and plays key roles in immune suppression. Increasing evidence, particularly in the last 5 years, has shown the potential of LAG-3 blockade in anti-tumor immunity. This review provides an update on the biological properties and clinical applications of LAG-3 in cancers.
简介:摘要2017年1月至2018年6月3例纵隔肿瘤伴上腔静脉阻塞综合征患者行全上腔静脉置换术,根据3D-CTBA重建影像技术进行术前手术规划,确定上腔静脉、左无名静脉、右无名静脉的形态、直径、受累范围和纵隔病灶的大小、部位。充分术前准备,麻醉干预。按照3D-CTBA重建结果,术中精准分离肿瘤周围组织,切除被侵组织肿瘤病灶和受累的上腔静脉、左无名静脉、右无名静脉部分。完整切除纵隔肿瘤,应用合适材料(人工血管、自体心包)行上腔静脉、左无名静脉、右无名静脉血管吻合重建。平均病灶直径7.5 cm,平均手术时间306 min,平均术中出血183 ml。术后病理诊断侵袭性胸腺瘤2例,胸腺癌1例。3例患者上腔静脉梗阻症状均得到改善,无围手术期死亡,随访至今均生存。
简介:摘要目的探讨miR-605-3p是否影响肺癌细胞A549的增殖和细胞活力。方法转染合成的miR-605-3p模拟物过表达miR-605-3p为过表达组,转染合成的miR-605-3p抑制剂敲低miR-605-3p为敲低组,通过CCK-8和MTT检测2组肺癌细胞A549的增殖水平和细胞活力。通过miRDB在线分析miR-605-3p潜在底物,并通过荧光素酶报告实验验证并分析潜在底物的作用。结果过表达组肺癌细胞A549的增殖水平和细胞活力较对照组均下降(t=12.45、15.38,P值均<0.05);敲低组肺癌细胞A549的增殖水平和细胞活力较对照组均上升(t=11.54、8.45,P值均<0.05)。miR-605-3p靶向TRIB3的3′端非编码区(t=17.32,P值均<0.05)。过表达TRIB3后,肺癌细胞A549的增殖水平和细胞活力均上升(t=10.45、9.04,P值均<0.05)。敲低TRIB3后,肺癌细胞A549的增殖水平和细胞活力均下降(t=8.43、17.43,P值均<0.05)。过表达miR-605-3p后,TRIB3的表达下降,β-catenin进入细胞核的量减少;敲低miR-605-3p后,TRIB3的表达上升,β-catenin进入细胞核的量增加。同时敲低miR-605-3p和TRIB3或miR-605-3p和β-catenin,发现肺癌细胞A549的增殖水平和细胞活力差异无统计学意义(t=0.42、0.61,P值均>0.05);过表达TRIB3的同时敲低β-catenin,发现肺癌细胞A549的增殖水平和细胞活力差异无统计学意义(t=0.56、0.21,P值均>0.05)。结论miR-605-3p靶向TRIB3抑制β-catenin的入核水平,抑制肺癌细胞A549的增殖水平和细胞活力。
简介:摘要目的应用cDNA分子克隆测序方法,鉴定中国南方汉族1个KIR3DL3新等位基因。方法采集1例KIR3DL3基因测序结果异常的无偿志愿捐血者的外周血样,提取mRNA并逆转录为cDNA。设计1对具有KIR3DL3基因特异性的PCR引物对cDNA进行扩增,扩增产物纯化后进行分子克隆测序。结果经分子克隆测序,检出1个正常的KIR3DL3*00802等位基因和1个KIR3DL3*064新变异等位基因。KIR3DL3*064与KIR3DL3*00601等位基因的序列最为接近,仅有编码区存在nt1184 C>T错义变异,导致第9外显子中的第374密码子由ACT变为ATT,所编码的苏氨酸(Thr)变为异亮氨酸(Ile)。该等位基因被世界卫生组织HLA因子命名委员会KIR分委会正式命名为KIR3DL3*064。结论cDNA分子克隆测序法能够鉴别常规测序分型中的异常结果,可用于鉴定KIR3DL3新等位基因。
简介:TheeffectofTPA,apotenttumorpromoter,onSSV-NIH3T3cellsinserum-freemediumwasinvestigated.TPAstimulatedDNAsynthesisofSSV-NIH3T3cellsonthethirddayofcultureinSFM.InSDS-PAGFofmediumconditionedbyTPA-treatedSSV-NIH3T3cells(inSFM+TPA),theamountsoffourproteinsof31.0Kd,28.5Kd,25.5Kdand13.5Kdstrikinglyincreasedoverthatofnon-TPA-treatedcounterpart(inSFM).ThePDGF-likeactivitywasalsodetectedinCMofSFM+TPA.WheninsulinandEGFweredrownofftheSFM+TPA(SFM-Ins-EGF+TPA),TPAlostitsabilitytostimulateDNAsynthesisofSSV-NIH3T3cellsonthethirddayandSDS-PAGEoftheconditionedmediumshowedthattheamountsofthefourproteinsnotedabovegratelyreduced.However,cellsinSFM-Ins-EGF+TPAwereinalmostthesamegrowthconditionascellsincompleteSFM+TPAonthethirddayofculture.Resultswerediscussedinthepaper.
简介:摘要目的探究高尔基体磷蛋白3(GOLPH3)通过PI3K/AKT/GSK3β信号调控子宫内膜癌(EC)细胞增殖与凋亡的机制。方法将人子宫内膜腺癌HEC-1-B细胞分为对照组、GOLPH3组和GOLPH3+GDC-0941组。通过转染GOLPH3 pcDNA质粒过表达GOLPH3,PI3K抑制剂GDC-0941用于阻断PI3K/AKT/GSK3β通路。分别通过CCK-8法、克隆形成实验和流式细胞术检测细胞活力、细胞增殖能力和细胞凋亡。通过Western blotting检测PI3K/AKT/GSK3β通路中蛋白磷酸化水平。结果转染实验成功,且PI3K抑制剂GDC-0941不会影响GOLPH3 mRNA和蛋白的表达。对照组、GOLPH3组、GOLPH3+GDC-0941组的相对细胞活力分别为(100.00±4.63)%、(131.56±7.85)%、(97.85±7.36)%,3组间差异有统计学意义(F=7.437,P<0.001);GOLPH3组高于对照组(P<0.001),GOLPH3+GDC-0941组低于GOLPH3组(P<0.001)。3组的细胞克隆形成数目分别为(46.86±3.56)个、(89.32±4.78)个、(46.48±4.05)个,差异有统计学意义(F=20.437,P<0.001);GOLPH3组多于对照组(P<0.001),GOLPH3+GDC-0941组少于GOLPH3组(P<0.001)。3组的细胞凋亡率分别为(5.17±0.61)%、(2.34±0.56)%、(6.85±0.53)%,差异有统计学意义(F=11.643,P<0.001);GOLPH3组低于对照组(P<0.001),GOLPH3+GDC-0941组高于GOLPH3组(P<0.001)。3组磷酸化PI3K/PI3K水平分别为1.00±0.09、3.32±0.19、0.93±0.06,磷酸化AKT/AKT水平分别为1.00±0.11、4.63±0.63、1.15±0.16,磷酸化GSK3β/GSK3β水平分别为1.00±0.08、4.06±0.57、1.04±0.14,差异均有统计学意义(F=12.532,P<0.001;F=16.792,P<0.001;F=15.311,P<0.001);各蛋白磷酸化水平GOLPH3组均高于对照组(均P<0.001),GOLPH3+GDC-0941组均低于GOLPH3组(均P<0.001)。结论在EC细胞中,过表达GOLPH3可通过激活PI3K/AKT/GSK3β通路促进细胞增殖并抑制细胞凋亡,提示GOLPH3参与EC的发生和发展。