微小RNA-128b与-181a和-223在急性白血病患者中的表达☆

背景:微小RNA是一类内源性非编码RNA.新近研究认为微小RNA可用作肿瘤标记物,对肿瘤进行分类.目的:分析微小RNA-181a、微小RNA-128b和微小RNA-223在急性白血病患者中的表达差异.方法:提取初治急性白血病患者及对照受试者骨髓单个核细胞总RNA,经微小RNA特异性引物反转录后,采用实时定量PCR分析各微小RNA的表达.结果与结论:与对照受试者相比,无论是急性非淋巴细胞白血病还是急性淋巴细胞白血病患者骨髓单个核细胞的微小RNA-128b,微小 RNA-181a和微小RNA-223表达均降低;统计学分析显示,急性非淋巴细胞白血病和急性白血病患者微小RNA-128b和微小RNA-181a表达与对照受试者比较差异有显著性意义(P<0.05),但急性淋巴细胞白血病患者与对照受试者比较差异无显著性意义(P>0.05);微小RNA-128b,-181a和-223的表达在急性非淋巴细胞白血病与急性淋巴细胞白血病患者之间差异无显著性意义(P>0.05).结果显示微小RNA-128b,-181a和-223有可能是急性白血病诊断与分型的生物标记物.     

PRAME基因在急性白血病中的表达及临床意义

为了探讨PRAME基因在急性白血病（AL）患者骨髓单个核细胞（BMMNC）中的表达及与疗效关系，我们用半定量RT-PCR的方法检测AL患者BMMNC的PRAME水平。[第一段]     

91例急性白血病患者骨髓单个核细胞CD96分子的表达研究

本研究旨在检测91例急性白血病患者骨髓单个核细胞(BMMNC)表面分子CD96的表达情况,并结合临床资料进行分析。采用流式细胞术检测91例初治急性白血病患者骨髓单个核细胞表面分子CD96,以15例健康成人作为对照组。结果表明:21例B-ALL患者BMMNC(CD45+CD34+CD19+)中CD96平均表达水平为(17.41±27.97)%,11例T-ALL患者BMMNC(CD45+CD34+CD7+)中CD96平均表达水平为(46.98±45.55)%,59例AML患者BMMNC(CD45+CD34+CD38-)中CD96平均表达水平为(16.69±25.08)%,与健康对照组BMMNC的CD96平均表达水平(0.52±1.84)%相比,差异有统计学意义(p<0.05);正规治疗后,CD96+及CD96-组的未缓解率(分别为52%,10.6%)差异有统计学意义(p<0.05);另外,复查治疗后CD96在BMMNC的平均表达水平显示,达到完全缓解的CD96+组为(1.68±2.31)%,与对照组比较,差异无统计学意义(p>0.05);而未达到完全缓解的CD96+组为(62.39±26.29)%,与对照组比较,...     

微小RNA在成年人急性髓细胞白血病中的研究进展

微小RNA（miRNA）为非编码单链RNA分子,于转录后水平调控靶基因mRNA与蛋白表达.miRNA特征性表达在成年人急性髓细胞白血病（AML）的发生、发展过程中起着重要作用,与AML的细胞形态学亚型、细胞遗传学、分子生物学特征及临床预后相关.深入了解AML相关miRNA表达谱,将为成年人AML的诊断、治疗及预后判断提供新理论依据及应用方案.     

急性髓系白血病骨髓单个核细胞糖基化磷脂酰肌醇特异性磷脂酶D mRNA的表达与意义

本研究探讨糖基化磷脂酰肌醇特异性磷脂酶D(glycosylphosphatidilinoditol-specific phospholipase D,GPI-PLD)在急性髓系白血病病人骨髓单个核细胞中的表达及其意义。采用半定量RT-PCR和酶转化底物的百分率的方法检测急性髓系白血病初发组、难治复发组、缓解组与正常对照组骨髓单个核细胞GPI-PLD酶活性和mRNA表达,并比较它们之间的差异。结果显示:急性髓系白血病初治组骨髓单个核细胞GPI-PLD mRNA表达和GPI-PLD活性分别为1.86±0.32、(46.96±7.15)%;缓解组分别为1.26±0.29和(33.36±5.13)%;难治复发组分别为1.79±0.19和(44.31±7.22)%;而正常对照组分别为1.27±0.23和(35.38±5.15)%。初治组和难治复发组的GPI-PLD活性与mRNA表达均明显高于正常对照组,差异具有统计学意义(p0.01);而缓解组与正常对照组之间比较,差异无统计学意义(p0.05)。结论:GPI-PLD活性和mRNA表达水平变化一致;初治组和难治复发组急性髓系白血病病人骨髓单个核细胞GPI-PLD活性与mRNA表达水平明显高于正常组。GPI-PLD是否在白血病的发生、发展过程中发挥一定作用,有待进一步研究。     

JAK-STAT信号转导在急性淋巴细胞白血病细胞中的表达特征分析

目的 探讨与分析酪氨酸激酶(JAK)-信号转导子与转录激活子(STAT)信号转导在急性淋巴细胞白血病(ALL)中的表达特征。方法 前瞻性选取2017年6月至2019年6月衡水市人民医院收治的ALL患者45例作为ALL组,选择同期健康体检者78例作为对照组,分离两组的骨髓单个核细胞,-80℃保存待检。采用聚合酶链式反应(PCR)方法检测JAK、STAT mRNA相对表达水平,通过Pearson进行相关性分析,Logistic回归性分析进行影响因素分析。结果 ALL组的白细胞、红细胞与血小板计数都显著少于对照组,差异均具有统计学意义(P 0. 05)。ALL组的外周血单个核细胞的JAK、STAT mRNA相对表达水平都显著高于对照组,差异均具有统计学意义(P 0. 05)。在123例入选者中,Pearson相关性分析显示,ALL的发生与JAK、STAT、白细胞、红细胞、血小板计数都存在显著正相关性(r=0. 461～0. 782,P均0. 05)。Logistic回归性分析显示,JAK、STAT、白细胞、血小板计数都为导致ALL发生的主要因素(P 0. 05)。结论 JAK-STAT信号转导在ALL细胞中呈现异常激活状况,共同参与ALL的发生,可为阐明ALL的发生机制提供参考。     

微小RNA在正常造血分化及白血病发病中的作用

微小RNA（microRNAs，miRNAs）是一组由19～25个核苷酸组成的不编码蛋白质的短小单链RNA家族。miRNAs广泛存在于真核生物中，在物种进化中相当保守，且表达具组织特异性和阶段特异性。目前研究发现，人类有200-255个基因编码miRNAs．相当于蛋白编码基因的1％。据推测，     

IL-24体外诱导儿童急性白血病骨髓单个核细胞凋亡研究

本研究探讨IL-24对儿童急性白血病骨髓单个核细胞(BMMNC)凋亡的影响,为临床应用提供理论依据。纳入本研究的确诊未治的儿童急性淋巴细胞白血病(ALL)、儿童急性非淋巴细胞白血病(ANLL)患者各20例。取患者骨髓分离单个核细胞;用琼脂糖电泳方法检测BMMNC DNA;采用碘化丙锭染色流式细胞术和细胞核形态观察同时检测体外培养的急性白血病BMMNC增殖、分化过程中的凋亡状况;观察IL-24对它们的影响,并进行了定量分析。采用RT-PCR检测bcl-2及caspase-3 mRNA表达水平,观察IL-24对它们的影响。结果发现:IL-24可诱导体外培养的急性白血病BMMNC凋亡。在培养的48小时,可见到DNA出现梯形条带;IL-24 50 ng/ml用药组细胞凋亡程度较没加IL-24的对照组明显增加。IL-24可下调体外培养的急性白血病BMMNC bcl-2基因mRNA的表达,上调caspase-3 mRNA的表达。结论:IL-24可诱导白血病BMMNC凋亡,其机制之一可能是下调bcl-2 mRNA的表达,上调caspase-3 mRNA的表达。     

自噬相关基因Beclin1和MAPLC3在急性白血病骨髓单个核细胞中的表达及其意义

本研究旨在检测人急性白血病(AL)骨髓单个核细胞中自噬相关基因Beclin1和微管相关蛋白质轻链3(MAPLC3)的表达,并探讨其意义。采用透射电子显微镜(TEM)和RT-PCR方法检测初治、复发难治、完全缓解(CR)的急性白血病患者和正常人骨髓单个核细胞(BMMNC)中的自噬活性以及Beclin1、MAPLC3mRNA的表达。结果表明:急性白血病初治组骨髓单个核细胞自噬活性、Beclin1和MAPLC3mRNA表达分别为80%、0.68±0.18、0.24±0.06;在难治复发组分别为100%、0.79±0.09、0.30±0.07;在完全缓解组分别为40%、0.52±0.15、0.16±0.04;在正常对照组分别为20%、0.57±0.13、0.16±0.05。初治组和难治复发组自噬活性和Beclin1、MAPLC3mRNA的相对表达量均高于正常对照组,差异有统计学意义(p<0.05)。完全缓解组和正常对照组之间比较差异无统计学意义(p>0.05)。结论 :初治组急性白血病骨髓单个核细胞中自噬活性和自噬相关基因Beclin1、MAPLC3mRNA的表达均上调,在难治复发组自噬活性和自噬相关基因Beclin1、MAPLC3mRNA的表达上调尤为明显,这可能与急性白血病的发生、发展及其耐药相关。     

微小RNA在骨髓增生异常综合征中的表达异常及意义

微小RNA(microRNAs,miRNAs)是一类长约22个核苷酸左右的非编码RNA,广泛存在于真核生物体内,参与转录后基因的表达调控.miRNA在骨髓增生异常综合征(myelodysplastic syndromes,MDS)患者中表达异常.本文就MDS中miRNA表达及调控的研究进展进行综述.     

结肠癌患者血浆中 microRNA-181b水平的检测及意义

目的：检测结肠癌患者血浆中 microRNA-181b(miR-181b)的水平变化,并初步探讨其临床意义。方法采用茎环定量逆转录聚合酶链反应(RT-PCR)方法检测42例结肠癌患者及42例健康人血浆中 miR-181b 的水平,并分析 miR-181b 与结肠癌临床病理特征之间的关系。结果与正常对照组(0.38±0.13)相比,结肠癌患者血浆中miR-181b 水平(0.64±0.22)明显升高,二者间差异有统计学意义(P <0.01);结肠癌患者血浆中 miR-181b 水平在不同性别、年龄及肿瘤大小之间差异无统计学意义(P >0.05),而在不同淋巴转移、远处转移及临床分期间的差异具有统计学意义(P <0.05)。结论结肠癌患者血浆中 miR-181b 水平增高,miR-181b 可能参与了结肠癌的发生发展过程。     

造血细胞磷酸酶与半胱氨酸蛋白酶基因在急性白血病患者中表达水平的研究

目的:探讨造血细胞磷酸酶(SHP-1)基因和天冬酰氨特异酶切的半胱氨酸蛋白酶(caspase-1、3)基因表达与急性白血病(acute leukemia,AL)患者的化疗效果的关系.方法:用RT-PCR方法检测急性白血病患者骨髓单个核细胞中SHP-1和caspase-1、3的mRNA表达.结果:AL患者SHP-1和caspase-1、3表达率分别为33.3%、80.0%、100.0%;SHP-1和caspase-1、3基因阳性患者的首次完全缓解(CR)率分别为85.0%、64.3%和55.8%,明显高于阴性患者(分别为15.6%、20.0%),差异均有统计学意义(P<0.05);caspase-1、3与SHP-1表达呈正相关.结论:SHP-1可能是一个潜在的抑癌基因,它可能是通过激活下游的凋亡基因caspase-1、3发挥作用;caspase-1、3与SHP-1基因表达呈正相关且与患者的CR率有关,表明它们均参与了急性白血病的转归,可同时作为判断急性白血病患者的疗效和预后指标.     

急性白血病系列特异性抗原表达分析

Objective To investigate the differential expression of serial specific antigens in patients with acute leukemia(AL)and its clinical significance.Methods Multi-parameter flow cytometry and CD45/SSC gating were used to analyze the surface and cytoplasmic antigen expression in juvenile cells of 183 AL patients.Results CD13,CD33 and CD117 were the most commonly expressed surface antigens in acute myeloid leukemia(AML)patients(95.0%,95.7%and 81.4% respectively).The specificity of CD117 was higher than that of CD13 and CD33(P＜0.01).There were no significant differents in sensitivity and specificity between cytoplasmic antigen MPO and surface antigen CD117(P＞0.05).In B-lineage acute lymphocytic leukemia(ALL),the sensitivity of CD19 was higher than CD20,but the specificity was similar tO CD20.cCD79a showed high sensitivity and specificity.In T-lineage ALL,the sensitivity of CD7 was high(95.0%),but the specificity was low(70.8%).But the sensitivity and specificity of cCD3 was 85.0% and 95.7% respectively.Conclusion Muli-parameter flow cytometry is a reliable technique in monitoring the expression of lineage-related surface/cytoplasmic antigens in the diagnosis of acute leukemia.     

急性白血病系列特异性抗原表达分析

Objective To investigate the differential expression of serial specific antigens in patients with acute leukemia(AL)and its clinical significance.Methods Multi-parameter flow cytometry and CD45/SSC gating were used to analyze the surface and cytoplasmic antigen expression in juvenile cells of 183 AL patients.Results CD13,CD33 and CD117 were the most commonly expressed surface antigens in acute myeloid leukemia(AML)patients(95.0%,95.7%and 81.4% respectively).The specificity of CD117 was higher than that of CD13 and CD33(P＜0.01).There were no significant differents in sensitivity and specificity between cytoplasmic antigen MPO and surface antigen CD117(P＞0.05).In B-lineage acute lymphocytic leukemia(ALL),the sensitivity of CD19 was higher than CD20,but the specificity was similar tO CD20.cCD79a showed high sensitivity and specificity.In T-lineage ALL,the sensitivity of CD7 was high(95.0%),but the specificity was low(70.8%).But the sensitivity and specificity of cCD3 was 85.0% and 95.7% respectively.Conclusion Muli-parameter flow cytometry is a reliable technique in monitoring the expression of lineage-related surface/cytoplasmic antigens in the diagnosis of acute leukemia.     

急性白血病系列特异性抗原表达分析

Objective To investigate the differential expression of serial specific antigens in patients with acute leukemia(AL)and its clinical significance.Methods Multi-parameter flow cytometry and CD45/SSC gating were used to analyze the surface and cytoplasmic antigen expression in juvenile cells of 183 AL patients.Results CD13,CD33 and CD117 were the most commonly expressed surface antigens in acute myeloid leukemia(AML)patients(95.0%,95.7%and 81.4% respectively).The specificity of CD117 was higher than that of CD13 and CD33(P＜0.01).There were no significant differents in sensitivity and specificity between cytoplasmic antigen MPO and surface antigen CD117(P＞0.05).In B-lineage acute lymphocytic leukemia(ALL),the sensitivity of CD19 was higher than CD20,but the specificity was similar tO CD20.cCD79a showed high sensitivity and specificity.In T-lineage ALL,the sensitivity of CD7 was high(95.0%),but the specificity was low(70.8%).But the sensitivity and specificity of cCD3 was 85.0% and 95.7% respectively.Conclusion Muli-parameter flow cytometry is a reliable technique in monitoring the expression of lineage-related surface/cytoplasmic antigens in the diagnosis of acute leukemia.     

急性白血病系列特异性抗原表达分析

Objective To investigate the differential expression of serial specific antigens in patients with acute leukemia(AL)and its clinical significance.Methods Multi-parameter flow cytometry and CD45/SSC gating were used to analyze the surface and cytoplasmic antigen expression in juvenile cells of 183 AL patients.Results CD13,CD33 and CD117 were the most commonly expressed surface antigens in acute myeloid leukemia(AML)patients(95.0%,95.7%and 81.4% respectively).The specificity of CD117 was higher than that of CD13 and CD33(P＜0.01).There were no significant differents in sensitivity and specificity between cytoplasmic antigen MPO and surface antigen CD117(P＞0.05).In B-lineage acute lymphocytic leukemia(ALL),the sensitivity of CD19 was higher than CD20,but the specificity was similar tO CD20.cCD79a showed high sensitivity and specificity.In T-lineage ALL,the sensitivity of CD7 was high(95.0%),but the specificity was low(70.8%).But the sensitivity and specificity of cCD3 was 85.0% and 95.7% respectively.Conclusion Muli-parameter flow cytometry is a reliable technique in monitoring the expression of lineage-related surface/cytoplasmic antigens in the diagnosis of acute leukemia.     

染色质组装因子1,b亚单位在急性髓系白血病细胞中的表达研究

目的 探讨染色质组装因子1,b亚单位（chromatin assembly factor 1,subunit b,CAF1b）在急性髓系白血病（AML）中的表达情况及其特异性.方法 建立流式细胞术检测胞内蛋白的方法,测定AML细胞株KG1a及正常人、特发性血小板减少性紫癜（ITP）、AML、急性淋巴细胞白血病（ALL）、慢性粒细胞白血病慢性期（CML-CP）、多发性骨髓瘤（MM）患者的骨髓单个核细胞中CAF1b的表达情况,利用WinMDI 2.9软件分析流式数据,并行统计分析,比较之间的差异.结果 AML患者骨髓单个核细胞和KG1a细胞CAF1b的表达率分别为（21.40±2.91）％、（27.87±1.48）％,均明显高于正常人、ITP、ALL、CML-CP、MM患者（P均＜0.05）.结论 CAF1b在AML有核细胞中表达特异性增高,提示其可能为AML特异性肿瘤抗原.     

急性白血病系列特异性抗原表达分析

目的探讨细胞系列特异性抗原在急性白血病（AL）中表达的差异及其临床意义。方法采用CD45／SSC双参数设门流式细胞术检测183例AL患者幼稚细胞表面及胞浆抗原表达。结果在AML中,细胞膜抗原CD13、CD33、CD117表达最常见,分别为95．0％、95．7％和81．4％,但CD117特异性高于CD13和CD33（P〈0．01）;胞浆抗原cMPO敏感性和特异性与CD117比较,差异无统计学意义（P〉0．05）;在B-ALL中胞膜抗原CD19敏感性高于CD20（P〈0．01）,两者特异性比较,差异无统计学意义;胞浆抗原cCD79a敏感性与CD19比较,差异无统计学意义（P〉0．05）,但特异性高于CD19（P〈0．01）;T-ALL中胞膜抗原CD7敏感性较高,达95．0％,但特异性仅为70．8％,胞浆抗原cCD3敏感性和特异性分别为85．0％和95．7％。结论多参数流式细胞术检测细胞系列特异性胞膜／胞浆抗原表达是诊断AL的一项可靠技术。     

急性白血病系列特异性抗原表达分析

Objective To investigate the differential expression of serial specific antigens in patients with acute leukemia(AL)and its clinical significance.Methods Multi-parameter flow cytometry and CD45/SSC gating were used to analyze the surface and cytoplasmic antigen expression in juvenile cells of 183 AL patients.Results CD13,CD33 and CD117 were the most commonly expressed surface antigens in acute myeloid leukemia(AML)patients(95.0%,95.7%and 81.4% respectively).The specificity of CD117 was higher than that of CD13 and CD33(P＜0.01).There were no significant differents in sensitivity and specificity between cytoplasmic antigen MPO and surface antigen CD117(P＞0.05).In B-lineage acute lymphocytic leukemia(ALL),the sensitivity of CD19 was higher than CD20,but the specificity was similar tO CD20.cCD79a showed high sensitivity and specificity.In T-lineage ALL,the sensitivity of CD7 was high(95.0%),but the specificity was low(70.8%).But the sensitivity and specificity of cCD3 was 85.0% and 95.7% respectively.Conclusion Muli-parameter flow cytometry is a reliable technique in monitoring the expression of lineage-related surface/cytoplasmic antigens in the diagnosis of acute leukemia.