学科分类
/ 25
500 个结果
  • 简介:摘要近年来免疫检查点抑制剂是癌症免疫治疗研究的一个重要里程碑。靶向程序性死亡受体1(PD-1)、程序性死亡受体-配体1(PD-L1)或细胞毒性T淋巴细胞相关抗原4(CTLA-4)的单克隆抗体在临床试验和临床应用中发挥着巨大的作用,并且当治疗有效时可产生持久的临床反应,已经成功获批应用于多种肿瘤的治疗。但是,因为其总体的应答率不高,仅使部分患者受益。因此,亟需探索新型的免疫检查点抑制剂,并且探究其作用机制进一步发展肿瘤免疫疗法。CD112R是免疫细胞表达的免疫球蛋白超家族受体,与肿瘤细胞表达的 Nectin-2/Necl 家族配体(CD112)相互结合,在肿瘤免疫治疗中具有很大的潜力,是新一代的抑制性免疫检查点。本文将对CD112-CD112R轴的分子结构与在肿瘤免疫反应中的作用进行阐述,探讨在癌症免疫治疗中的潜在应用。

  • 标签: 免疫 肿瘤 免疫检查点 CD112 CD112R
  • 简介:AbstractBackground:The mortality rate among patients with nasopharyngeal carcinoma (NPC) has improved significantly with the advent of chemoradiotherapy strategies. However, distant metastasis remains problematic. Tumor-specific reactivity in cancer patients has been detected exclusively in CD39+ T cells, particularly in CD39+CD103+ T cells. Circulating cancer-specific T cells are important for protecting against metastasis. This study aimed to evaluate the predictive value of circulating CD39+CD8+ T cells for metastasis in patients with NPC.Methods:We performed a cross-sectional, longitudinal study of 55 patients with newly diagnosed NPC of stage III-IVa. All patients were initially treated with standard combined chemoradiotherapy. Blood samples were obtained from 24 patients before and at 1 month and 6 months after treatment. T cell expression of CD39 and CD103, together with the markers of T cell exhaustion programmed death-1 (PD-1)/T cell immunoglobulin and mucin domain-containing protein 3 (Tim-3) and markers of cell differentiation CD27/CC-chemokine receptor 7/CD45RA, was examined by flow cytometry. The Wilcoxon rank-sum test analysis was used to analyze the differences between two groups. Kaplan-Meier analysis was used for analysis of progression-free survival (PFS).Results:The expression of circulating CD39+CD8+ and CD39+CD103+ CD8+ T cells was significantly higher in patients without distant metastasis (CD39+CD8+: 6.52% [1.24%, 12.58%] vs. 2.41% [0.58%, 5.31%], Z=-2.073, P=0.038 and CD39+CD103+ CD8+: 0.72% [0.26%, 2.05%] vs. 0.26% [0.12%, 0.64%], Z=-2.313, P = 0.021). Most CD39+ T cells did not express PD-1 or Tim-3. Patients with high expression of CD39+CD103+CD8+ T cells had better PFS than patients with low expression (log rank value = 4.854, P = 0.028). CD39+CD8+ T cells were significantly elevated at 1-month post-treatment (10.02% [0.98%, 17.42%] vs. 5.91% [0.61%, 10.23%], Z = -2.943, P = 0.003). The percentage of advanced differentiated CD8+ T cells also increased at 1-month post-treatment compared with pre-treatment (33.10% [21.60%, 43.05%] vs. 21.00% [11.65%, 43.00%], Z =-2.155, P = 0.031). There was a significant correlation between elevated CD39+CD8+ T cells and increased effector memory T cells (intermediate stage: r = 0.469, P = 0.031; advanced stage: r = 0.508, P = 0.019).Conclusions:CD39+CD8+ circulating T cells have preserved effector function, contributing to an improved prognosis and a reduced risk of metastasis among NPC patients. These cells may thus be a useful predictive marker for a better prognosis in patients with NPC.

  • 标签: Nasopharyngeal carcinoma CD39 T cell Prognosis
  • 简介:摘要目的探究CD44.CD24在乳腺癌中的表达情况及意义。方法收集2008年1月1日至2013年1月1日本院本科室收治的160例乳腺癌患者,作为对照组;20例单纯性乳腺小叶增生和20例单纯性乳腺小管增生患者,作为实验组。应用双染免疫组织化学方法检测其CD44和CD24的表达情况。通过对检测结果进行分析,探究CD44和CD24在乳腺癌中的表达情况及意义。结果对本次研究分析后,对照组单纯性乳腺小叶增生和单纯性乳腺小管增生患者,CD44、CD24细胞的阳性率分别为10.00%和15.00%、15.00%和20.00%,经χ2检验,P>0.05,差异无统计学意义;实验组乳腺癌患者CD44、CD24细胞的阳性率均>65.00%,经χ2检验,P<0.05,差异有统计学意义。结论CD44、CD24在乳腺癌中具有比较高的表达率,其较高的表达率与乳腺癌的发生有关。

  • 标签: 乳腺癌 CD44 CD24
  • 简介:AIM:ToassesstheutilityofanautologousCD34+andCD133+stemcellsinfusionasapossibletherapeuticmodalityinpatientswithend-stageliverdiseases.METHODS:Onehundredandfortypatientswithendstageliverdiseaseswererandomizedintotwogroups.Group1,comprising90patients,receivedgranulocytecolonystimulatingfactorforfivedaysfollowedbyautologousCD34+andCD133+stemcellinfusionintheportalvein.Group2,comprising50patients,receivedregularlivertreatmentonlyandserveda...

  • 标签:
  • 简介:目的初步探讨CD4Cr细胞表达的腺苷CD39和CD73在过敏性哮喘患者外周血中的水平变化及与叉头蛋白3(FoxP3)、GATA结合蛋白3(GATA3)和维A酸相关孤儿受体(ROR)-γtmRNA相关性。方法:选择54例对屋尘螨过敏的慢性持续期哮喘患者[间歇状态和轻度持续哮喘组(间歇.轻度组)29例,中重度组25例]和45名健康志愿者.通过荧光实时定量PCR方法检测并比较研究对象外周血CD4+T细胞中CD39、CD73、FoxP3、GATA3和ROR-γtmRNA水平。结果:CD39mRNA水平正常对照组明显高于间歇-轻度组(P=0.000),间歇.轻度组明显高于中重度组(P=0.001)。CD73mRNA水平正常对照组明显高于间歇-轻度组(P=0.001),哮喘亚组间差异无统计学意义(P=0.126)。哮喘组CD4+T细胞表达的CD39mRNA与FoxP3mRNA水平呈显著正相关性(r=0.607。P=0.000),与GATA3mRNA水平呈显著负相关性(r=-0.505,P=-0.000),与ROR-γtmRNA无显著相关性(r=-0.287,P=0.054)。哮喘组CD4+T细胞表达的CD73mRNA与FoxP3和ROR-γtmRNA水平无显著相关性(r=0.110,P=0.450;r=-0.227,P=0.138),与GATA3mRNA水平呈显著负相关性(r=-0.286,P=-0.040)。结论:CD4+T细胞表达的CD39和CD73在过敏性哮喘免疫反应过程中起到重要作用。

  • 标签: 过敏性哮喘 CD4+T细胞 CD39 CD73
  • 简介:目的研究乳腺浸润性微乳头状癌(invasivemicropapillarycarcinoma,IMPC)的干细胞表型,从干细胞和上皮间质转化(epithelial—mesenchymaltransition,EMT)角度探讨IMPC高侵袭、高转移恶性生物学行为的原因。方法选取术前未经放化疗治疗患者的IMPC82例和乳腺非特殊型浸润性导管癌(invasiveductalcarcinomanototherwisespecified,IDC—NOS)80例石蜡包埋组织标本切片,通过免疫组织化学双染技术检测两组肿瘤组织中CD44^+/CD24^-/low(CD24^-)和CD24^+的表达、定位和分布情况,并分析其与各临床病理学特征之间的关系。定量资料采用Student’st检验,定性资料采用Mann-WhitneyU检验、Kruskal—Waliis检验、x^2检验或校正x^2检验。两组之间相关性采用Spearman's秩相关分析。结果(1)IMPC组肿瘤细胞的CD44^+/CD24^-/low阳性表达率(48.8%,40/82例),明显高于IDC—NOS组(31.3%,25/80例)(x^2=5.180,P=0.023)。(2)53.7%(44/82例)的IMPC微细间质组织内见单个散在的CD44^+/CD24^-/low肿瘤细胞,且该细胞免疫组织化学染色Vimentin及α—SMA阳性,E—Cadherin阴性。IDC—NOS间质内罕见CD44^+/CD24^-/low肿瘤细胞。(3)IMPC微乳头结构中CD44^+/CD24^-/low与间质内的CD44^+/CD24^-/low阳性表达细胞呈明显正相关(r=0.516,P〈0.001),并且IMPC微乳头结构及间质中CD44^+/CD24^-/low阳性表达在有无淋巴管侵犯和有无淋巴结外软组织浸润方面的差异均有统计学意义(P〈0.050),即有淋巴管侵犯及淋巴结外软组织浸润者CD44^+/CD24^-/low阳性表达率较高。(4)IMPC组中CD24^+细胞阳性表达率79.3%(65/82例),明显高于IDC-NOS组(60.0%,48/80例)(x^2=7.126,P=0.008),且IMPC中淋巴结转移阳性组CD24的表达高于阴性组,差异有统计学意义(x^2=8.834,P=0.003)。结论IMPC肿瘤细胞中干细胞

  • 标签: 乳腺肿瘤 乳腺浸润性微乳头状癌 干细胞 CD44+/CD24-/low CD24+ 上皮间质转化
  • 简介:Usingtwo-colourflowcytometry>200antibodiessubmittedtothe8thInternationalWorkshopofHumanLeukocyteDifferentiationAntigens(HLDA8)havebeenanalyzedfortheirreactivitywithrestingandactivatedCD203c+basophils.Fourantibodieseithernon-reactiveorweaklyreactivewithrestingbasophilsexhibitedanincreasedreactivitywithbasophilsactivatedbyanti-IgE-mediatedcross-linkingofthehighaffinityIgEreceptor(FcεRI).TheseincludeantibodiesagainstCD164(WS-80160,cloneN6B6andWS-80162,clone67D2),aswellastworeagentswithpreviouslyunknownspecificitiesthatwereidentifiedasCD13(WS-80274,cloneA8)andCD107a(WS-80280,cloneE63-880).Theactivationpatternsfollowedeitherthe'CD203c-like'or'CD63-like'activationprofile.TheCD203cprofileischaracterizedbyarapidandsignificantupregulation(ofCD13,CD164,andCD203c),reachingmaximumlevelsafter5-15minofstimulation.ThePhosphoinositide-3-kinase(PI3K)-specificinhibitorWortmannininhibitedtheupregulationofthesemarkerswhereas12-O-tetradecanoyl-phorbol-13-acetate(TPA)inducedarapidandFcεRI-independentupregulationwithin1-2min.IntheCD63profile,maximumupregulation(ofCD63andCD107a)wasdetectedonlyafter20-40min,andupregulationbyTPAreachedmaximumlevelsafter60min.Insummary,ourdataidentifyCD13,CD107a,andCD164asnovelbasophil-activationantigens.Basedontimekineticsofupregulation,wehypothesizethatmoleculesofthe'CD203cgroup'andthe'CD63group'arelinkedtotwodifferentmechanismsofbasophilactivation.

  • 标签: CD13 CD107a CD164 嗜碱细胞 抗原 抗体
  • 简介:法国MicromegaMiniumCD诞生于1997年。记得当年MiniumCD上市不久,《音响世界》杂志曾做了一次题为《萝卜青菜,各有所爱》的平价CD碟机集体测试,其中就有这款机器.当时评价相当不错。

  • 标签: 法国 Micromega公司 Minium CD机 “厚声” 木钉
  • 简介:TheeffectofCdionsonsalmonspermDNAwasstudiedbymeansofcirculardichroism(CD),Ramanspectroscopy,X-rayphotoelectronspectroscopy(XPS)andfluorescencespectroscopy.TheCDspectralandfluorescentprobe-acriflavineresultsindicatethattheDNAunderwentaconformationchangeupontheadditionofCdions.XPSandRamanstudiesrevealthatthereexistedinteractionsbetweenCdionsandthephosphategroupsoftheDNA.Inaddition,anewbandappearedat803cm-1intheRamanspectra,whichcanbeattributedtocharacterizing"marker"bandofA-DNA.ItisconcludedthatCdionscanbecoordinatedbythephosphategroupsoftheDNAandinducetheconformationchangesoftheDNAfromB-DNAtoA-DNA.

  • 标签: CD ion DNA RAMAN spectroscopy Conformation.
  • 简介:现在网上的资源越来越丰富,随着宽带的普及,很多人已经开始不满足光下电影和软件了,他们开始追求更让心灵陶冶的高品质音乐。这里音乐可不是指MP3,而是APE格式的音乐,这也是目前比较流行的音乐格式。这些高品质音乐,一般都是好心人买回原版CD后用EAC抓轨,再转换成APE格式,供大家下载。

  • 标签: 刻录机 刻录速度 防刻录技术 光盘 光驱 CD音乐
  • 简介:CD71分子,又称转铁蛋白受体(TfR),是与细胞的成熟、增殖、分化密切相关的分子,在许多类型的细胞表面均有表达。目前对CD71的研究已涉及到血液、肿瘤等许多与免疫相关的领域,但国内外对它与肾脏疾病的关系研究甚少,本文主要讨论它的功能作用与IgA肾病的关系。

  • 标签: IGA肾病 CD71 转铁蛋白受体 细胞表面 肾脏疾病 国内外
  • 简介:《一水隔天涯》可说是雨林唱片最为成功的唱片之一,陈洁丽作为雨林的“当家花旦”,其声音有其特别的魅力,加之唱功不错,所以其首张唱片从雨林推出,即引起广泛关注,且不少喜欢以她的唱片作人声演示。此专辑在2003年问世,这是陈洁丽演唱已趋成熟、雨林的录制也进入一个新的发展时期之际,所以促成了这张靓碟的问世,由于商业的成功其后又出版了XRCDCD及LP唱片,由此可知此专辑在雨林唱片产品中的地位。

  • 标签: LP唱片 CD 雨林 专辑