简介:目的总结颅眶沟通黏膜相关淋巴组织结外边缘区B细胞(MALT)淋巴瘤的诊治经验。方法回顾性分析l例眼眶MALT淋巴瘤原位复发及颅内、颌面部转移患者的临床资料,结合文献复习,讨沦其转移方式、影像学特点及治疗措施。结果该患者行联合手术治疗颅眶占位病变,颌面部病变未处理,术后病理学结果为MALT淋巴瘤;术后复查MRI示右侧眼眶肿瘤全切,术后2周左眼视力较术前改善。结论眼眶MALT淋巴瘤转移至颅内罕见,需于术联合放疗或化疗,术后长期随访十分重要。
简介:GinsenosideRg1(Rg1)hasanti-agingandanti-neurodegenerativeeffects.However,themechanismsunderlyingtheseactionsremainunclear.TheaimofthepresentstudywastodeterminewhetherRg1affectshippocampalsurvivalandneuriteoutgrowthinvitroafterexposuretoamyloid-betapeptidefragment25–35(Aβ25–35),andtoexplorewhethertheextracellularsignal-regulatedkinase(ERK)andAktsignalingpathwaysareinvolvedinthesebiologicalprocesses.Weculturedhippocampalneuronsfromnewbornratsfor24hours,thenaddedRg1tothemediumforanother24hours,withorwithoutpharmacologicalinhibitorsofthemitogen-activatedproteinkinase(MAPK)familyorAktsignalingpathwaysforafurther24hours.Wethenimmunostainedtheneuronsforgrowthassociatedprotein-43,andmeasuredneuritelength.Inaseparateexperiment,weexposedculturedhippocampalneuronstoAβ25–35for30minutes,beforeaddingRg1for48hours,withorwithoutAktorMAPKinhibitors,andassessedneuronalsurvivalusingHoechst33258staining,andphosphorylationofERK1/2andAktbywesternblotanalysis.Rg1inducedneuriteoutgrowth,andthiseffectwasblockedbyAPI-2(Aktinhibitor)andPD98059(MAPK/ERKkinaseinhibitor),butnotbySP600125orSB203580(inhibitorsofc-JunN-terminalkinaseandp38MAPK,respectively).Consistentwiththiseffect,Rg1upregulatedthephosphorylationofAktandERK1/2;theseeffectswerereversedbyAPI-2andPD98059,respectively.Inaddition,Rg1significantlyreversedAβ25–35-inducedapoptosis;thiseffectwasblockedbyAPI-2andPD98059,butnotbySP600125orSB203580.Finally,Rg1significantlyreversedtheAβ25–35-induceddecreaseinAktandERK1/2phosphorylation,butAPI-2preventedthisreversal.OurresultsindicatethatRg1enhancesneuriteoutgrowthandprotectsagainstAβ25–35-induceddamage,andthatitsmechanismmayinvolvetheactivationofAktandERK1/2signaling.更多还原
简介:目的筛选有效的MRP1siRNA序列,为RNAi的体内外研究提供依据.方法利用Dharmacon公司的RNA在线工具,设计了4对针对MRP1基因不同区域的siRNA序列,分别转染至U251等三种肿瘤细胞,采用荧光转染试剂观察转染效率;采用RT-PCR和Westernblot检测MRP1mRNA和蛋白的表达.结果siRNA1、siRNA2、siRNA3、siRNA4四对序列分别转染上述三种肿瘤细胞后的RT-PCR实验结果说明siRNA2和siRNA4对MRPmRNA有较强的抑制作用.结论siRNA2、siRNA4是可有效抑制MRP基因表达的序列.
简介:乳头状胶质神经元肿瘤(papillaryglioneuronaltumor,PGNT)是一种罕见的神经系统肿瘤,伴肿瘤卒中目前国内外文献仅1例报道,2007年6月第四版(WHO中枢神经系统肿瘤分类》将其增加为新的神经系统肿瘤。我院最近收治一例PGNT伴卒中的患者,现报道如下。
简介:患者女性,56岁。因阵发性失神发作40年,加重并头痛、呕吐1月入院。查体:神清语明,嗅觉减退,余颅神经无异常,眼底视乳头轻度水肿,肢体活动正常。