简介:Psoriasin(S100A7)是一种分子量为22.9kD的同源二聚体蛋白,属于S100蛋白家族成员。通过与钙离子结合,参与细胞内外重要的生命活动。其基因定位于染色体1q21.2-q22。Psoriasin(S100A7)蛋白最初是从银屑病异常增生的角化细胞中分离得到的,故称为Psoriasin,即银屑素。Psoriasin在异常增生的角化细胞、膀胱鳞状细胞癌和原位及浸润乳腺癌中表达上调。Psoriasin这种分泌和表达特征有可能作为膀胱鳞状细胞癌和乳腺癌等恶性肿瘤的候选标志物。
简介:Leber'scongenitalamaurosis(LCA)andrecentgenetherapyadvancementfortreatinginheritedretinopathieswereextensiveliteraturereviewedusingMEDLINE,PubMedandEMBASE.Adeno-associatedviralvectorswerethemostutilisedvectorsforoculargenetherapy.Conephotoreceptorcellsmightuseanalternatepathwaywhichwasnotreliantoftheretinalpigmentepithelium(RPE)derivedretinoidisomerohydrolase(RPE65)toaccessthe11-cisretinaldehydechromophore.Researcheffortsdedicatedontheprogressionofagene-basedtherapyforthetreatmentofLCA2.Suchgenetherapyapproacheswereextremelysuccessfulincanine,porcineandrodentLCA2models.TherecombinantAAV2.hRPE65v2adenoassociatedvectorcontainedtheRPE65cDNAandwasreplicationdeficient.ItsinvitroinjectionintargetcellsinducedRPE65proteinproduction.Thegenetherapytrialsthatweresofarconductedforinheritedretinopathieshavegeneratedpromisingresults.PhaseIclinicaltrialstocureLCAandchoroideremiademonstratedthatadeno-associatedviralvectorscontainingRPEgenesandphotoreceptorsrespectively,couldbesuccessfullyadministeredtoinheritedretinopathypatients.AphaseIIItrialispresentlyongoingandifsuccessful,itwillleadthewaytoadditionalgenetherapyattemptstocuremonogenic,inheritedretinopathies.
简介:目的探讨小儿腹部Burkitt's淋巴瘤的多排螺旋CT影像特点及鉴别诊断.方法收集21例经手术及病理活检证实的小儿腹部淋巴瘤21例,其中,Burkitt's淋巴瘤12例,非Burkitt's淋巴瘤9例,分别比较两组淋巴瘤的临床症状、发病部位、肿块大小、肿块内坏死灶情况、受累肠壁厚度及扩张度、腹腔淋巴结及肝脾情况等CT影像学表现,采用统计学软件SPSS计算结果.结果Burkitt's淋巴瘤常常形成较大肿块,直径>40mm,占91.7%,最常见发生于肠管,占66.7%,受累肠管肠壁呈肿瘤样增厚,占66.7%,受累肠管常常扩张而非狭窄,占50%,肝脾肿大较少见.与非Burkitt's淋巴瘤比较,均有显著性差异(P值均<0.05).结论小儿腹部Burkitt's淋巴瘤在螺旋CT上有多个特征性影像学表现,结合病史及临床表现能够做出较明确的诊断.
简介:Osteoblastsofratculturedinvitrowerestimulatedwithpulsed50Hzelectromagneticfieldandbasicfibroblastgrowthfactor(bFGF).TheMTTmethod,flowcytometryandhistochemistrystainingwereusedtodetectcellproliferation,cellcycleandalkalinephosphatase.Theresultsindicated:afterstimulatedby1mTelectromagneticfield,thecellsaremoreabundant,havemoreSphasepercentages,2mTelectromagneticfieldhavenoevidenteffectoncells'growth;comparedwithelectromagneticfield,thecellsstimulatedbybFGFaremoreabundantandhavelargerSphaseratios.ElectromagneticfieldandbFGFhavenoeffectoncells,alkalinephosphatase.Therefore,weconcludedthatelectromagneticfieldcanenhanceosteoblastsgrowthlikesomegrowthfactorsuchasbasicfibroblastgrowthfactor,andtheosteoblasts',characteristicswasnotchanged.
简介:摘要以某型无人机S形变截面复合材料进气道为研究对象,详细阐述进气道的模具设计方案及成型方案,开展基于橡胶软模+水溶性芯模组合模具的S形变截面复合材料进气道成型工艺研究,研究结果表明,橡胶软模+水溶性芯模组合模具能够实现S形变截面复合材料进气道的精确成型和脱模,且能够大幅降低水溶性芯模的制造周期和成本,该模具类型及成型方法对此类典型异形变截面复合材料管状结构件的制造具有重要指导意义。
简介:AIM:ToexaminetheprotectiveeffectsofGinkgobilobaextract(GbE)onthelearningandmemoryintheAlzheimerdisease(AD)modelinducedbyaluminumsaltinrats,andtoexaminethepotentialmechanisms.METHODS.TheADmodelofratswasinducedbyadministrationanddrinkingofaluminumchloridesolution.Theabilitiesofspatialleafingand
简介:Inthepresentstudy,theeffectsofPleurotusnebrodensispolysaccharide(PN-S)ontheimmunefunctionsofimmunosuppressedmiceweredetermined.Theimmunosuppressedmousemodelwasestablishedbytreatingthemicewithcyclophosphamide(40mg/kg/2d,CY)throughintraperitonealinjection.TheresultsshowedthatPN-SadministrationsignificantlyreversedtheCY-inducedweightloss,increasedthethymicandsplenicindices,andpromotedproliferationofTlymphocyte,Blymphocyte,andmacrophages.PN-SalsoenhancedtheactivityofnaturalkillercellsandincreasedtheimmunoglobulinM(IgM)andimmunoglobulinG(IgG)levelsintheserum.Inaddition,PN-Streatmentsignificantlyincreasedthephagocyticactivityofmouseperitonealmacrophages.PN-Salsoincreasedthelevelsofinterleukin-6(IL-6),tumornecrosisfactor-α(TNF-α),interferon-γ(INF-γ),andnitricoxide(NOS)insplenocytes.qRT-PCRresultsalsoindicatedthatPN-SincreasedthemRNAexpressionofIL-6,TNF-α,INF-γ,andnitricoxidesynthase(iNOS)inthesplenocytes.TheseresultssuggestthatPN-Streatmentenhancestheimmunefunctionofimmunosuppressedmice.Thisstudymayprovideabasisfortheapplicationofthisfungusinadjacentimmunopotentiatingtherapyagainstcancerandinthetreatmentofchemotherapy-inducedimmunosuppression.
简介:AbstractBackground:The prevalence rates of freezing of gait (FOG) in Parkinson’s disease (PD) vary widely, ranging from 14.0 to 55.1%. Our aim is to calculate the overall prevalence of FOG in all PD patients with different disease durations and severities.Methods:Using Medline/PubMed/Embase, we carried out a systematic literature search for studies reporting the PD and clinically relevant FOG.Results:After primary screening, a total of 35 studies were identified and further analyzed for inclusion into the analysis, and 29 studies fulfilled the quality criteria and included in this meta-analysis. The overall prevalence of FOG in PD was 39.9% (95% CI 35.3-44.5%). The FOG identified by the freezing of gait questionnaire item 3 may be more prevalent (43.8%, 95% CI 38.5-49.1%) than the FOG identified by the Unified Parkinson’s Disease Rating Scale item 14 (36.0%, 95% CI 29.0-43.1%). Disease duration and severity are both the clinical features associated with the FOG. The highest FOG prevalence rate in PD patients was seen in patients with disease durations ≥ 10 years, at 70.8%, followed that of PD patients with disease durations ≥ 5 years (53.3%), and PD patients with disease durations < 5 years (22.4%). FOG presented in 28.4% of PD patients with Hoehn and Yahr staging (H&Y) score ≤ 2.5, and in 68.4% of PD patients with H&Y score ≥ 2.5.Conclusion:This meta-analysis confirms that the prevalence of FOG in PD is considerable, and highlights the need for accurate identification of FOG in PD.