目的探讨髓样相关蛋白8(MRP8)、MRP14及其异二聚体MRP8/14对小鼠骨髓源性树突状细胞(BMDC)表型成熟的影响。方法体外培养及纯化小鼠BMDC,分为对照组、1μg/m L MRP14处理组、1μg/m L MRP8处理组、1μg/m L MRP8/14处理组。采用流式细...目的探讨髓样相关蛋白8(MRP8)、MRP14及其异二聚体MRP8/14对小鼠骨髓源性树突状细胞(BMDC)表型成熟的影响。方法体外培养及纯化小鼠BMDC,分为对照组、1μg/m L MRP14处理组、1μg/m L MRP8处理组、1μg/m L MRP8/14处理组。采用流式细胞术检测刺激后BMDC表面共刺激分子CD40、CD80、CD86、主要组织相容性复合体Ⅱ(MHCⅡ)的表达情况。结果 MRP14、MRP8及MRP8/14均能促进BMDC表面共刺激分子CD40、CD80、CD86表达,MRP14、MRP8均能促进BMDC表面共刺激分子MHCⅡ表达,且MRP14和MRP8/14促进BMDC表达CD80、CD86的能力强于MRP8。结论 MRP14、MRP8及MRP8/14通过增加BMDC表面共刺激分子的表达而促进BMDC的表型成熟,且MRP8、MRP14及MRP8/14三者促进DC表达各种共刺激分子的能力不同。展开更多
OBJECTIVE: To determine whether affected reticulocytes could be a reliable marker for the diagnosis of paroxysmal nocturnal hemoglobinuria (PNH), we analyzed CD59-antigen expression on the membranes of reticulocytes a...OBJECTIVE: To determine whether affected reticulocytes could be a reliable marker for the diagnosis of paroxysmal nocturnal hemoglobinuria (PNH), we analyzed CD59-antigen expression on the membranes of reticulocytes and erythrocytes. METHODS: We studied 10 PNH patients and 5 healthy volunteers by two-color flow cytometry with a membrane permeable fluorescent dye, thiazole orange (TO), and anti-CD59 monoclonal antibodies (MoAb). TO was introduced to gate reticulocytes and anti-CD59 MoAb were used to identify glycosylphosphatidylinositol (GPI)-deficient cells. RESULTS: Cells from healthy individuals were only CD59 positive. However, in all PNH patients, CD59-antigen expression could be divided into 3 types: type I cells (CD59 normally positive), type II cells (CD59 partly positive) and type III cells (CD59 negative). The majority of reticulocytes belonged to type III cells, GPI-deficient cells (61.0%). In addition, the percentage of affected reticulocytes was higher than that of erythrocytes. CONCLUSIONS: Analyzing PNH reticulocytes was important, because most patients had elevated numbers of reticulocytes, which represent more closely the recent erythroid output of BM. However, circulating mature erythrocytes were subject to complement-mediated intravascular lysis. Therefore, the percentage of abnormal erythrocytes may not accurately reflect the proliferation rate of normal and abnormal erythroid progenitor cells. Thus, affected reticulocytes could be a more reliable indicator for the diagnosis of PNH than mature erythrocytes.展开更多
文摘目的探讨髓样相关蛋白8(MRP8)、MRP14及其异二聚体MRP8/14对小鼠骨髓源性树突状细胞(BMDC)表型成熟的影响。方法体外培养及纯化小鼠BMDC,分为对照组、1μg/m L MRP14处理组、1μg/m L MRP8处理组、1μg/m L MRP8/14处理组。采用流式细胞术检测刺激后BMDC表面共刺激分子CD40、CD80、CD86、主要组织相容性复合体Ⅱ(MHCⅡ)的表达情况。结果 MRP14、MRP8及MRP8/14均能促进BMDC表面共刺激分子CD40、CD80、CD86表达,MRP14、MRP8均能促进BMDC表面共刺激分子MHCⅡ表达,且MRP14和MRP8/14促进BMDC表达CD80、CD86的能力强于MRP8。结论 MRP14、MRP8及MRP8/14通过增加BMDC表面共刺激分子的表达而促进BMDC的表型成熟,且MRP8、MRP14及MRP8/14三者促进DC表达各种共刺激分子的能力不同。
文摘OBJECTIVE: To determine whether affected reticulocytes could be a reliable marker for the diagnosis of paroxysmal nocturnal hemoglobinuria (PNH), we analyzed CD59-antigen expression on the membranes of reticulocytes and erythrocytes. METHODS: We studied 10 PNH patients and 5 healthy volunteers by two-color flow cytometry with a membrane permeable fluorescent dye, thiazole orange (TO), and anti-CD59 monoclonal antibodies (MoAb). TO was introduced to gate reticulocytes and anti-CD59 MoAb were used to identify glycosylphosphatidylinositol (GPI)-deficient cells. RESULTS: Cells from healthy individuals were only CD59 positive. However, in all PNH patients, CD59-antigen expression could be divided into 3 types: type I cells (CD59 normally positive), type II cells (CD59 partly positive) and type III cells (CD59 negative). The majority of reticulocytes belonged to type III cells, GPI-deficient cells (61.0%). In addition, the percentage of affected reticulocytes was higher than that of erythrocytes. CONCLUSIONS: Analyzing PNH reticulocytes was important, because most patients had elevated numbers of reticulocytes, which represent more closely the recent erythroid output of BM. However, circulating mature erythrocytes were subject to complement-mediated intravascular lysis. Therefore, the percentage of abnormal erythrocytes may not accurately reflect the proliferation rate of normal and abnormal erythroid progenitor cells. Thus, affected reticulocytes could be a more reliable indicator for the diagnosis of PNH than mature erythrocytes.
