PBX3在急性髓系白血病中的高表达及其临床意义

目的探讨前B细胞白血病同源盒基因3(PBX3)在急性髓系白血病(AML)患者骨髓样本中的表达及其临床意义。方法通过生物信息学方法,分析美国癌症和肿瘤基因图谱计划数据库(TCGA)33种类型癌症转录组测序数据,获得PBX3 mRNA在泛癌中的表达水平,进一步分析AML患者中PBX3 mRNA表达水平与患者临床病理特征、预后的关系。利用全转录组基因表达差异分析,探究AML中PBX3相关分子特征。结果PBX3 mRNA表达水平在12种癌症类型中上调,其中在AML患者中上调最为显著。PBX3高表达AML患者总生存时间和无病生存时间较PBX3低表达患者缩短,且与AML分子遗传学事件FLT3、NPM1和DNMT3A基因突变有关。PBX3表达与多个同源盒基因(包括多数HOXA和HOXB基因、MEIS1)呈正相关,且这些同源盒基因在AML患者中表达水平均与总生存时间呈负相关。结论AML患者骨髓中PBX3基因高表达可能是预后不良的潜在生物标志物,其与同源盒基因可能存在广泛的相互作用。

Effects of controlled superovulation on the expression of HOXA10,integrin αvβ3 and LIF in mice during peri-implantation

Objective:To observe the expression of endometrial homologous box gene A10(HOXA10),Integrinαvβ3 and leukemia suppressor factor(LIF)in peri-implantation mice,and to investigate the effect of controlled superovulation(COH)on endometrial receptivity in mice.Methods:After COH model preparation and blastocyst transplantation,kunming pure-bred mature mice were randomly divided into natural blastocyst+natural pseudocyst group,COH blastocyst+natural pseudocyst group,natural blastocyst+COH pseudocyst group,and COH blastocyst+COH pseudocyst group.The pregnancy rate and average number of beds in each group were observed on day 6 of conception.Western blot and RT-PCR were used to detect the expression of HOXA10,Integrinααvβ3,LIF protein and mRNA in the endometria of mice on day 5 of conception.Results:The pregnancy rate and average number of beds in the COH group were lower than those in the natural receptor group.The expression of HOXA10,Integrinααvβ3 and LIF in endometrium was significantly lower than that of the natural receptor mice(P<0.01).Conclusion:Superovulation drugs down-regulate the expression of HOXA10,Integrinαvβ3 and LIF in endometrium during the implantation window,reduce endometrial receptivity,and lead to low clinical pregnancy rate.

同源盒A9和前B细胞白血病同源盒基因在结肠癌中的表达及意义

目的观察同源盒A9(HOXA9)和前B细胞白血病同源盒基因(PBX3)在结肠癌组织及其癌旁组织中的表达,探讨二者与结肠癌临床病理参数的关系及其对结肠癌3年预后的影响。方法选取2014年8月至2016年5月于南阳市第一人民医院进行手术治疗的结肠癌病人77例,取其癌组织及相应癌旁组织,实时荧光定量PCR(qRT-PCR)法检测结肠癌及其癌旁组织HOXA9 mRNA、PBX3 mRNA表达情况,免疫组织化学法检测其癌组织及癌旁组织标本中HOXA9P与PBX3蛋白表达,分析HOXA9P、PBX3表达与临床病理特征的关系,运用Spearman法分析HOXA9P与PBX3表达相关性,通过Kaplan-Meier法对结肠癌病人3年内存活情况进行分析。结果与癌旁组相比,结肠癌组HOXA9 mRNA[(3.09±0.55)比(1.02±0.15)]、PBX3 mRNA表达水平[(2.51±0.47)比(0.98±0.11)]、HOXA9、PBX3蛋白阳性表达率显著升高(P<0.05);HOXA9、PBX3表达均与结肠癌病人分化程度、TNM分期有关(P<0.05);Spearman相关性分析结果显示结肠癌组织中HOXA9与PBX3 mRNA表达呈正相关(rs=0.643,P<0.05);Kaplan-Meier法分析显示HOXA9、PBX3阳性表达组3年内总生存率(OS)显著低于阴性表达组(41.2%VS 84.6%,43.6%VS 86.4%)。结论结肠癌组织中HOXA9、PBX3均高表达,二者呈正相关,均与结肠癌分化程度、TNM分期及预后相关,可能共同参与结肠癌的发生发展。