【摘要】 人类ERMAP基因是新近发现的编码红细胞膜相关蛋白基因,其功能可能与红系造血活动有关。为探讨该基因在胎儿造血过程中的作用,收集9-36周难免流产胎儿共29例,分别抽提其肝脏、脾脏、肾脏、心脏、肺脏、胸腺、大脑、骨髓和肌肉等9种脏器组织的RNA,取其中胎龄25+5周(25周过5天,下同)的胎儿各脏器组织的RNA进行Northernblot检测,了解人类ERMAP基因在胎儿脏器组织中的表达谱,同时采用荧光定量PCR(FQ-PCR)方法观察该基因在不同胎龄胎儿组织中表达量的变化规律。结果Northernblot检测显示,人类ERMAP基因在25+5周胎儿肝脏和骨髓中表达阳性,而在脾脏、肾脏、胸腺、心脏、肺脏、大脑及肌肉中表达阴性。FQ-PCR结果显示,人类ERMAP基因在9-36周胎儿肝脏中均有表达,其表达量从第12周开始升高,18-20周达高峰,21周后逐渐下降;该基因在胎儿骨髓中的表达则从15周开始,27-32周达高峰,之后迅速下降,其表达量低于肝脏;在其余7个脏器中仅有部分标本呈现低水平表达。结论:人类ERMAP基因在胎儿肝脏中的表达规律与胎儿肝脏造血过程基本一致,在15-32周胎儿骨髓中的表达规律与胎儿期骨髓造血活动基本吻合,推测该基因的功能可能与胎儿发育过程中红系细胞向肝脏和骨髓的迁移活动有关。更多还原

【Abstract】 Human ERMAP (hERMAP) is a novel gene coding for erythroid membrane-associated protein, which may play a role in erythropoiesis. To explore the role of hERMAP in fetal hematopoiesis, 29 fetuses of inevitable abortion with the fetal ages of[KG*3]9-36 weeks were collected, and the total RNAs were isolated from the liver, spleen, kidney, heart, lung, thymus, brain, bone marrow and skeletal muscle, the RNAs from which at 25~ +5 week fetal age were used to detect hERMAP expressions in different fetal tissues with Northern blot, and the hERMAP in various fetal tissues were quantified by FQ-PCR. As a result, Northern blot showed that hERMAP was expressed in liver and bone marrow at 25~ +5 fetal age, but not in the other organ tissues. FQ-PCR results indicated that the hERMAP had been still expressed in 9-36th week fetal liver, increased starting from 12th-week, reaching a peak between 18 -20th week and declining slowly starting from 21st-week. In the fetal bone marrow, expression of the hERMAP began from 15th week, reached a highest level between 27-32nd week and fell rapidly from 33rd week, the expression level of which was lower than that in liver. The low level expression of this gene was observed in some specimens of kidney, heart, lung, thymus, brain and skeletal muscle. It is concluded that the expression of hERMAP in fetal liver approximately consistent with haematopoiesis of fetal liver, and the expression of this gene in bone marrow aged 15-32th fetal weeks coincides with haematopoiesis of fetal bone marrow. It suggests that the function of the hERMAP is possibly related with the migration of erythroid cells to liver and bone marrow during the fetal development process.更多还原