AMD3100联合地塞米松对造血干细胞的动员作用

BACKGROUND:The number of hematopoietic stem cells in the peripheral blood is very low at normal physiological state. So it is critical to mobilize hematopoietic stem cells from donor’s bone marrow into the peripheral blood. OBJECTIVE:To study the combination effect of AMD3100 and dexamethasone on the mobilization of hematopoietic stem cells in mice, thereby laying the foundation for clinical application. METHODS:C57BL/6 mice were injected with AMD3100 and dexamethasone alone or in combination. Then, hematopoietic stem cells in the peripheral blood and bone marrow were collected. CD34⁺ cell concentration in the peripheral blood and bone marrow was determined by flow cytometer and the content of leucocytes in the peripheral blood was counted by a normal method. The CFU-Mix colony formation ability of hematopoietic stem cells was identified by cell colony forming assay. RESULTS AND CONCLUSION:The concentration of CD34⁺ cells in the peripheral blood and bone marrow, the content of leukocytes in the peripheral blood and the CFU-Mix colony formation ability of hematopoietic stem cells were all improved by both AMD3100 and dexamethasone and especially their combined use. This indicates that both AMD3100 and dexamethasone could mobilize hematopoietic stem cells to migrate from the bone marrow to the peripheral blood, and when used in combination, the mobilization effect is better than that of single drug.     

微柱凝胶法及试管法检测新生儿血型抗体的比较

目的比较微柱凝胶法(简称卡式法)及试管法在新生儿血型抗体检测中的检出率。方法选取2016年1月至2017年6月河南省人民医院新生儿监护室及产科住院出生7 d内新生儿血液标本1 482例,除去142例AB血型后,同时用微柱凝胶血型检测卡、抗人球蛋白卡、试管一次离心和多次离心法检测1 340例血型抗体,并对不同检测方法进行比较分析。结果在1 340例送检血样中,新生儿血型抗体在各个ABO血型的检出率是不一样的,B型新生儿血型抗体检出率最高。试管法一次离心对于新生儿血型抗体检测没有任何的优势。在血型检测卡检测阴性483例标本中,抗人球蛋白卡检出率为51.76%(250/483),高于试管多次离心法(37.27%,180/483)。结论在全自动血型检测卡新生儿血型鉴定时,出现血型抗体检测不出的标本,可以把血浆和反定型细胞加入抗人球蛋白卡继续试验,可提高新生儿正反定型一致率,为新生儿输血安全提供保障。