造血干细胞分化过程中HOXB6基因表达及干预研究  

Expression of HOXB6 Gene on Differentiation of Hematopoietic Stem Cells and Intervention Research

作　　者：陈红英[1] 陈艾[1] 刘文君[1] 

机构地区：[1]泸州医学院附属医院儿科,四川泸州646000

出　　处：《实用儿科临床杂志》2010年第3期177-180,共4页Journal of Applied Clinical Pediatrics

基　　金：四川省教育厅重点科研项目(2004A058)

摘　　要：目的探讨脐血造血干细胞(HSC)向粒-单系(CFU-GM)、红系(CFU-E)和淋巴系祖细胞(CFU-TL)增殖分化过程中HOXB6基因的表达情况及全反式维A酸(ATRA)对其的影响。方法1.采用造血干/祖细胞体外培养技术,以ATRA持续干扰人类脐血造血干/祖细胞,观察HSC经人粒细胞-单核细胞集落刺激因子(GM-CSF)、促红细胞生成素(EPO)和植物血凝素(PHA)分别诱导后,在培养第3天、第7天和第12天的CFU-GM、CFU-E及CFU-TL集落生成情况。2.采用实时荧光定量RT-PCR技术(FQ-RT-PCR)检测造血干细胞增殖分化过程中HOXB6基因的表达水平。结果1.人类造血干细胞向CFU-GM、CFU-E和CFU-TL增殖分化过程中,各组细胞HOXB6基因均有表达。2.随时间推移,CFU-GMHOXB6 mRNA在增殖分化的第3天开始表达,第7天表达最强烈,第12天表达明显减弱;CFU-E HOXB6 mRNA表达在第3天、第7天和第12天均持续增强;而在CFU-TL中,HOXB6 mRNA表达在第7天最强烈,第12天表达减弱。3.与对照组比较,ATRA可上调各组HOXB6基因的表达。结论1.在人脐血CFU-GM、CFU-E和CFU-TL的不同增殖分化阶段,HOXB6基因呈现持续稳定的表达,提示HOXB6基因与人类造血干细胞增殖分化过程密切相关。2.HOXB6基因在人类造血干细胞向CFU-GM、CFU-E和CFU-TL的正常增殖分化过程中呈现时间上的规律性。3.低浓度(60μmol.L-1)的ATRA能显著上调HOXB6基因的表达。Objective To observe the expression level of HOXB6 gene on the differentiation and proliferation of hematopoietic stem cells（HSC） to colony forming unit-granulocyte-monocyte（CFU-GM）,erythroid progenitor（CFU-E） and colony forming unite-T-lymphocyt（CFU-TL）.And the proliferation procress was affected by all-transretinoic acid（ATRA）.Methods 1.By the colony culture in vitro,the impact of ATRA on the CFU-GM,CFU-E,CFU-TL colony formation were surveyed;the expressions of HOXB6 gene were observed on the differentiation procress of HSC to CFU-GM,CFU-E and CFU-TL affected by ATRA on the 3^rd,7^th,12^th.2.Real-time fluorogenic quantitative reserve transcription-polymerize chain reaction（FQ-RT-PCR） method was used to explore the possible mechanism of ATRA up-regulated to human cord blood CFU-GM,CFU-E and CFU-TL in gentic level.Results 1.HOXB6 gene had a regulatory function in the differentiation procress of hematopoiesis.During the differentiation and proliferation of HSC to colony forming CFU-GM or CFU-E,CFU-TL in vitro,the expressions of HOXB6 gene were significant positive.2.Compared with the expressions of CFU-GM and CFU-TL HOXB6 mRNA on day 3,the quantity of HOXB6 mRNA was obviously higher on day 7 and lower on day 12,respectively in each group.Compared with the expression of CFU-E HOXB6 mRNA on day 3,the quantity of HOXB6 mRNA was obviously higher on day 12 in each group.3.Compared with the HOXB6 gene of control group,the expressions of HOXB6 gene of group ATRA were up-regulated remarkable.Conclusions 1.HOXB6 gene has a regulatory function in the differentiation procress of hematopoiesis.HOXB6 gene plays an important role in the progress which can be associated with the regulating effect of HOXB6 gene on the differentiation and proliferation of CFU-GM,CFU-E and CFU-TL.2.During the differentiation and proliferation of HSC,the expression of HOXB6 gene is regular in time.3.Low concentration of ATRA（60 μmol·L^-1） can up-regulate the expression of HOXB6 gene,which confirms the theory that the no

关 键 词：HOXB6基因 造血干细胞 实时荧光定量反转录聚合酶链反应 

分 类 号：R329[医药卫生—人体解剖和组织胚胎学]