Cobe Spectra与Fenwal CS 3000 Plus血细胞分离器外周血造血干/祖细胞的采集效能比较

为了评价Cobe Spectra(Version6.1)和Fenwal CS 3000 Plus两种血细胞分离机在造血干／祖细胞采集中的采集效能，对36人64次外周血造血干／祖细胞的采集进行了回顾性分析．20人42次使用Cobe Spectra采集，16人22次使用Fenwal CS 3000 Plus采集对CD34^ 细胞采集量、采集效率以及红细胞与血小板的采集量进行比较，结果表明：Cobe Spectra和Fenwal CS 3000 Plus在CD34^ 细胞采集量和采集效率上无显著差异?CD34^ 细胞采集量与供者白细胞、单核细胞、造血祖细胞、CD34^ 细胞的动员情况呈正相关，在多因素stepwise线性回归模型中，采集前外周血干／祖细胞浓度是唯一有意义的影响因素，Fenwal CS 3000 Plus的采集效率与外周血单核细胞量呈负相关。Fenwal CS 3000 Plus对红细胞的收集量显著高于Cobe Spectra，并且采集后供者外周血血小板降低程度较Cobe Spectra更严重。结论：Cobe Spectra(Version 6．1)和Fenwal CS 3000 Plus在CD34^ 细胞的采集能力上无显著差别。当外周血单核细胞数量高，或是血型不合移植的及血小板减少的供者，推荐使用Cobe Spectra血细胞分离机.     

外周血造血干/祖细胞动员与采集时动态快速监测造血祖细胞的意义

为了获得高效的外周血干/祖细胞采集,探索一种简便、快速的外周血干/祖细胞监测方法，采用Sysmex XE-2100血细胞分析仪的幼稚细胞信号（IMI）检测通道识别和计数外周血造血祖细胞（HPC）。对25例行异基因外周血造血干细胞移植动员的供和11例自体外周血干细胞动员的患的外周血造血干/祖细胞进行了动态观察。于动员过程中取外周血进行HPC，CD34^ 细胞和CFU-GM的检测，对采集物也进行上述检测。结果表明：在外周血标本中HPC与CD34^ 细胞和CFU-GM二间均呈良好的正相关性。所有检测病例外周血CD34^ 细胞与HPC同时上升，同时达高峰。供的峰值出现在动员的第5天，快速升高晚于白细胞。而患外周血干/祖细胞的快速升高早于白细胞。采集物中HPC与CD34^ 细胞和CFU-GM呈正相关性。采集当日外周血中HPC和CD34^ 细胞计数与采集所得CD34^ 细胞数量亦具有良好的线性相关。结论：造血祖细胞的监测是一种快速、简便又经济的监测外周血干细胞采集时机和预测成功采集的可靠指标。     

女性供者特征对粒细胞集落刺激因子动员的骨髓和外周血混合采集物中造血和免疫细胞组份的影响

目的 探讨女性健康供者特征对粒细胞集落刺激因子（G CSF）预激的骨髓和外周血混合采集物造血细胞和免疫细胞组份的影响。方法 111名健康女性供者应用G CSF动员,用流式细胞仪测定骨髓和外周血混合采集物中的CD34+细胞和T细胞亚群的数量,并分析怀孕、年龄、身高等供者特征对骨髓和外周血采集物中细胞组份的影响。结果 111例女性健康供者骨髓和外周血混合采集物中的CD34+细胞、CD3+T细胞、CD3+CD4+T细胞、CD3+CD8+T细胞和CD3+CD4-CD8-调节性T细胞的数量以每公斤供者体重计算的中位值分别为2.39×106/kg、226.57×106/kg、120.80×106/kg、89.99×106/kg和15.05×106/kg。①年龄对混合移植物中CD3+CD4-CD8-调节性T细胞的数量有影响。②体重指数（BMI）对混合采集物中的CD3+T细胞以及CD3+CD4-CD8-T细胞的数量有影响;③外周血干细胞采集当天的淋巴细胞（LYM）对混合采集物中的CD3+T细胞、CD3+CD4+T细胞和CD3+CD8+T细胞的数量有影响;④骨髓干细胞采集当天的LYM对混合采集物中CD3+T细胞和CD3+CD4-CD8-调节性T细胞的数量有影响;⑤与怀孕供者相比,未怀孕供者混合采集物中含有更高数量的CD3+CD8+ T细胞。结论 供者年龄、BMI、是否怀孕以及骨髓干细胞和外周血干细胞采集当天的LYM是骨髓免疫组份的主要影响因素。     

Hematopoietic progenitor cell count, but not immature platelet fraction value, predicts successful harvest of autologous peripheral blood stem cells

Mobilized stem cells in the peripheral blood (PB) must be efficiently harvested at the appropriate time before autologous PB stem cell (PBSC) transplantation. Enumeration of CD34+ cells in the PB before apheresis predicts the number of PBSCs that can be collected, but the cytometric techniques used are complex and expensive. Therefore, it is necessary to identify an alternative to the CD34+ cell count in PBSC harvest-time monitoring. Fully automated flow cytometry using blood cell counters now allows reliable quantification of immature myeloid cells in the PB, referred to as hematopoietic progenitor cells (HPC), and reticulated platelets, expressed as the immature platelet fraction (IPF). Immature or reticulated platelets are thought to correlate with thrombopoietic activity of the marrow. Following a chemotherapy nadir, the recovery of white blood cell and platelet counts has been used to determine the right time for apheresis. Therefore, we examined whether the HPC count and IPF value could be used to predict PBSC mobilization in 20 patients with hematological malignancies. The HPC count was found to be correlated with the CD34+ cell count (r = 0.84, P < 0.01), whereas the IPF value was not (r = 0.37, P = 0.44). Therefore, the HPC count, but not the IPF value, is a possible predictor of the timing of autologous stem cell transplantation.     

两种血细胞分离机干/祖细胞采集和移植效果的比较

背景：外周血造血干/祖细胞通过血细胞分离机进行体外收集,血细胞分离机的性能、工作状况将直接关系到采集物的特性和数量,从而直接影响受者的造血重建。目的：比较Fenwal CS-3000Plus与Amicus两种血细胞分离机采集外周血造血干/祖细胞及受者移植效果。方法：共入选接受异基因外周血干细胞移植患者51例,Fenwal CS-3000Plus组27例,平均年龄（34.2±10.6）岁;Amicus组24例,平均年龄（35.4±12.1）岁。比较两组采集物有核细胞数、CD34＋细胞数、采集效率、红细胞与血小板采集量及造血重建时间。结果与结论：两组采集物的有核细胞数、CD34＋细胞数、采集效率、红细胞采集量及造血重建时间差异均无显著性意义;Fenwal CS-3000Plus组血小板采集量明显高于Amicus组（P〈0.01）。结果显示Fenwal CS-3000Plus与Amicus血细胞分离机在分离外周血干/祖细胞方面和移植效果没有差异;血小板较低被采集者使用Amicus血细胞分离机采集可能更为安全。     

大鼠骨髓和外周血早晚期内皮祖细胞的分离培养和鉴定

背景：旨在从大鼠外周血及骨髓中提取内皮祖细胞,培养晚期内皮祖细胞,为干细胞移植治疗或通过内皮祖细胞联合基因治疗使内皮祖细胞高表达血管新生诱导因子,达到促进缺血性脑血管病血管新生的目的。目的：从大鼠骨髓及外周血中分离出内皮祖细胞并对其进行鉴定。方法：使用密度梯度离心及贴壁筛选法从大鼠骨髓和外周血中分离获得单个核细胞,进行诱导培养,观察并记录贴壁细胞的生物学特征;选取内皮祖细胞特异性表面标志CDl33、CD34、KDR对原代细胞进行免疫荧光检测,利用流式细胞学技术检测KDR、CD34表达,并通过吞噬功能实验进～步鉴定培养细胞。结果与结论：大鼠骨髓和外周血能够分离获得早晚期内皮祖细胞;贴壁细胞免疫荧光检测CD34、CDl33、KDR表达阳性;流式细胞学检测CD34、KDR表达阳性;贴壁细胞能够吞噬ac—LDL,结合UEA-1。实验成功从大鼠骨髓及外周血中分离出内皮祖细胞;并获得了增殖活性强的晚期内皮祖细胞,找到了更好的成血管干细胞的种子来源。     

The COBE Spectra cell separator is more effective than the Haemonetics MCS-3P cell separator for peripheral blood progenitor cell harvest after mobilization with cyclophosphamide and filgrastim

BACKGROUND: Peripheral blood is rapidly replacing bone marrow as a source of hematopoietic progenitor cells for autologous transplantation. The advantages of peripheral blood progenitor cell transplantation are enhanced by the ability to collect sufficient progenitor cells to ensure rapid neutrophil and platelet recovery in a single procedure on some cell separators. STUDY DESIGN AND METHODS: A prospective randomized study was undertaken to compare peripheral blood progenitor cell yields from two cell separators (MCS-3P, Haemonetics and Spectra, COBE). Fifteen consecutive patients were mobilized with cyclophosphamide 2 g per m2 (Day 0) and filgrastim 10 micrograms per kg (Days 1–11). Consecutive collections (Day 10, Day 11) were performed with each machine once: patients were randomly assigned to either machine for the initial collection. RESULTS: Collection time was longer on the MCS-3P (p = 0.001), and the volume processed was greater with the Spectra (p < 0.0001). Despite similar nucleated cell yield (p = 0.62), the yield of CD34+ cells (p = 0.001) and colony-forming units- granulocytic-monocytic (p = 0.0001) was significantly higher with the Spectra. The yield of nucleated cells per unit of blood volume processed was higher for the MCS-3P (p = 0.0007), while the CD34+ cell yield (p = 1) and colony-forming units-granulocytic-monocytic yield (p = 1) per unit of blood volume processed were similar for the two machines. The collection of CD34+ cells at levels > 2 × 10(6) per kg (p = 0.063), 5 × 10(6) per kg (p = 0.031), and colony-forming units- granulocytic-monocytic > 1 × 10(5) per kg (p = 0.25) after a single collection was superior for the Spectra. CONCLUSION: The yield of progenitor cells after collection on the Spectra was superior to that achieved with the MCS-3P, because of the larger volume of blood processed per procedure. This would permit more patients to undergo only one collection.     

重组人白细胞介素11联合重组人粒细胞集落刺激因子动员自体外周血干细胞移植治疗急性白血病

目的:观察重组人白细胞介素11(rhIL-11)联合重组人粒细胞集落刺激因子(rhG-CSF)动员自体外周血干细胞治疗急性白血病的效果及不良反应。方法:急性白血病患者14例,其中治疗组6例(实验组)在化疗后外周血白细胞计数降至最低时,皮下注射rhIL-113μg/d及rhG-CSF250μg/d,连用至外周血白细胞升高至10×109/L左右时(采集干细胞时)停药。单用rhG-CSF组为对照组。结果:采集前外周血血小板、CD34+细胞数实验组高于对照组(P<0.05),采集产品的CD34+、CD34+/CD38-、CD34+/CD41a+、CD34+/CD42b+细胞数实验组均高于对照组(P<0.05);移植后实验组血小板>20×109/L平均时间为14.5d,对照组为20.2d(P=0.06)。不良反应主要是肌肉关节疼痛及水肿,均为Ⅰ～Ⅱ级。结论:rhIL-11与rhG-CSF动员外周血干细胞治疗急性白血病安全有效。     

rhIL-11联合rhG-CSF动员小鼠外周血造血干/祖细胞的研究

目的　研究rhIL 11对小鼠巨核系造血干 /祖细胞的动员作用。方法　rhIL 112 5 0μg·kg-1·d-1或联合rhG CSF 2 5 0 μg·kg-1·d-1给C5 7BL/ 6小鼠皮下注射 1～ 7d ,观察用药前和用药第 3,5 ,7,9天小鼠外周血白细胞、血小板计数 ,CD34 +细胞比例 ,CFU GM、CFU MK、CFU E的数量变化。结果　单用rhIL 11或与rhG CSF联合使用时 ,外周血白细胞、血小板、CD34 +细胞比例及各种造血细胞集落数明显高于对照组 (P <0 .0 1)。在含有IL 11的实验组中 ,CFU MK明显高于rhG CSF组 (P <0 .0 1)。结论　rhIL 11可升高外周血白细胞、血小板 ,同时增加外周血CD34 +细胞的比例 ,提高粒、红、巨核系造血细胞集落形成单位的数量 ,特别是对CFU MK作用较强 ;与rhG CSF联合使用对动员骨髓造血干 /祖细胞进入外周血有明显的协同作用。     

Preapheresis peripheral blood CD34+ mononuclear cell counts as predictors of progenitor cell yield

BACKGROUND: Peripheral blood progenitor cells, harvested by apheresis after mobilization, provide rapid hematologic recovery after high-dose chemotherapy. However, because harvesting these cells is expensive and time-consuming, there has been much interest in optimizing collection protocols. An investigation was made to determine whether, in this clinical setting, peripheral blood progenitor cell yields may be predicted from preapheresis progenitor cell counts, allowing the length of each procedure to be "fine tuned" to achieve specific target goals. STUDY DESIGN AND METHODS: Preapheresis peripheral blood CD34+ cell and total colony-forming cell counts were assessed before 78 peripheral blood progenitor cell collections from 13 consecutive patients were performed. Preapheresis counts were correlated with actual progenitor cell yields. Factors affecting this correlation were analyzed. RESULTS: With the use of linear regression analysis preapheresis progenitor cell counts were found to correlate significantly but weakly with actual yields per kg of body weight per liter of blood processed (CD34+ cells: r = 0.43; colony-forming cells: r = 0.56). Further analysis revealed two possible causes: 1) circulating progenitor cell concentrations fluctuate widely during harvest, which implies that preapheresis counts are not representative of actual concentrations during apheresis, and 2) the efficiency with which apheresis machines extract mononuclear cells varies greatly between procedures. CONCLUSION: Preapheresis CD34+ and colony-forming cell counts correlated poorly with subsequent yields in this clinical setting, which suggests that it is not practical to use such counts to predict with certainty the length of apheresis needed to achieve a target yield.     

Kinetics of peripheral blood stem cell harvests during a single apheresis

BACKGROUND: The enumeration of CD34+ cells in the peripheral blood of patients before leukapheresis is commonly used to predict the outcome of stem cell harvests. The concept that an increased number of transplanted cells gives faster marrow reconstitution triggers an interest in investigating the kinetics of peripheral blood stem cells during leukapheresis. The aim of this study was to investigate the issue of recruitment of hematopoietic progenitor cells during a single leukapheresis. STUDY DESIGN AND METHODS: Nine leukapheresis procedures (in 8 patients) were investigated. In each case, 3 blood volumes were processed. Samples from peripheral blood, the collection line of apheresis equipment, and the collected component were obtained after each blood volume was processed. The enumeration of CD34+ cells was performed, and the total number of progenitors, as a sum of the number of cells in the peripheral blood and the number of cells in the collected component, was calculated. RESULTS: A mean of 13.3 L of blood was processed, and a component with a mean volume of 424 mL and a mean of 10.1 x 10(6) CD34+ cells per kg of body weight was collected. White cell and mononuclear cell counts in peripheral blood declined concomitantly during the procedures. The calculated total number of cells--that is, the sum of the number of cells in the collected component and the number of cells in the peripheral blood--showed a concomitant, but not equal, rise in polymorphonuclear cells, mononuclear cells, and CD34+ cells during the leukapheresis. This apparent mobilization of progenitors into the peripheral blood did not correlate with the slightly increased number of polymorphonuclear cells or with the more pronounced increase in mononuclear cells. CONCLUSION: There is a substantial recruitment of progenitor cells during a single leukapheresis.     

The CD34 antigen: structure, biology, and potential clinical applications.

The diversity of function of mature circulating blood cells is reflected in their respective complements of cell-surface molecules and receptors. Although monoclonal antibodies have been instrumental in the identification and characterization of many cell-surface molecules on mature hematopoietic cells, the CD34 antigen represents to date, the only molecule, similarly identified, whose expression within the blood system is restricted to a small number of primitive progenitor cells in the bone marrow. Although its precise function remains unknown, the pattern of expression of the CD34 structure suggests that it plays an important role in early hematopoiesis. The availability of CD34 antibodies has greatly aided the development of techniques for the enrichment of primitive progenitor cells for studies of hematopoiesis in vitro. Additionally, the use of CD34 antibodies for the 'positive selection' of hematopoietic stem/progenitor cells represents and alternative strategy to 'negative selection' or purging for the large-scale manipulation of bone marrow cells prior to transplantation. The availability of pure populations of the most primitive hematopoietic progenitor cells may also facilitate the development of genetic techniques for the repair of specific blood cell disorders. In this article, we review the biology of the CD34 molecule and assess some of the roles for CD34 antibodies in immunopathology and for progenitor/stem cell purification in clinical applications.     

恶性血液系统疾病自体外周血造血干细胞动员的临床分析

目的:分析恶性血液系统疾病患者外周血造血干细胞动员与采集过程中的影响因素。方法:对50例血液系统恶性疾病患者在东南大学附属中大医院血液科进行外周血造血干细胞动员。对患者年龄、性别、动员方案、疾病状态、采集机器等因素进行分析,评估以上因素对干细胞动员结果的影响,并分析了采集前白细胞、血红蛋白、血小板的数量与采集的CD34^+细胞计数的相关性。结果:动员方案对CD34^+细胞采集数及CD34^+细胞采集成功率的影响有显著性影响,而性别、年龄、确诊到动员间隔时间、既往化疗方案、骨髓受累与否等对干细胞采集数量影响并不显著。采集前外周血白细胞数量及血红蛋白数量与采集的CD34^+细胞数呈正相关。采集前外周血中白细胞计数及单个核细胞计数与采集成功密切相关。结论:化疗联合细胞因子的动员方案采集造血干细胞优于单用细胞因子的动员方案。通过采集前白细胞计数及单个核细胞计数确定合适的采集时机,可以提高采集的成功率。     

The predictive value of white cell or CD34+ cell count in the peripheral blood for timing apheresis and maximizing yield

BACKGROUND: The collection of peripheral blood stem and progenitor cells (PBPCs) for transplantation can be time-consuming and expensive. Thus, the utility of counting CD34+ cells and white cells (WBCs) in the peripheral blood was evaluated as a predictor of CD34+ cell yield in the apheresis component. STUDY DESIGN AND METHODS: The WBC and CD34+ cell counts in the peripheral blood and the apheresis components from 216 collections were assessed. Sixty-three patients underwent mobilization with chemotherapy plus filgrastim, and 17 patients and 14 allogeneic PBPC donors did so with filgrastim alone. The relationship between the number of WBC and CD34+ cells in the peripheral blood and in the apheresis component was analyzed by using rank correlation and linear regression analysis. RESULTS: The correlation coefficient for CD34+ cells per liter of peripheral blood with CD34+ cell yield (x 10(6)/kg) was 0.87 (n = 216 collections). This correlation existed for many patient and collection variables. However, patients with acute myeloid leukemia had fewer CD34+ cells in the apheresis component at any level of peripheral blood CD34+ cell count. Components collected from patients with CD34+ cell counts below 10 x 10(6) per L in the peripheral blood contained a median of 0.75 x 10(6) CD34+ cells per kg. When the WBC count in the blood was below 5.0 x 10(9) per L, the median number of CD34+ cells in the peripheral blood was 5.6 x 10(6) per L (range, 1.0-15.5 x 10(6)/L). A very poor correlation was found between the WBC count in the blood and the CD34+ cell yield (p = 0.12, n = 158 collections). CONCLUSION: The number of CD34+ cells, but not WBCs, in the peripheral blood can be used as a predictor for timing of apheresis and estimating PBPC yield. This is a robust relationship not affected by a variety of patient and collection factors except the diagnosis of acute myeloid leukemia. Patients who undergo mobilization with chemotherapy and filgrastim also should undergo monitoring of peripheral blood CD34+ cell counts, beginning when the WBC count in the blood exceeds 1.0 to 5.0 x 10(9) per L.     

The use of hematocrit level for predicting the efficiency of peripheral blood CD34+ cell collection after G‐CSF Mobilization in Healthy Donors

Recently, peripheral blood stem cell (PBSC) has been widely used and replaced bone marrow (BM) as the stem cell source in allogeneic hematopoietic stem cell transplantation (HSCT) because of a more rapid engraftment, easier accessibility, and lower risk of donor complications. We, therefore, report the predicting factors for the high PBSC harvest yields in 50 healthy donors. Among the 50 donors, median collected CD34⁺ cell number was 4.6 × 10^6/kg (1.5–16.3 × 10⁶/kg). Number of circulating CD34+ cells and hematocrit (HCT) level increased parallelly whereas peripheral CD34+ cell numbers were decreased with increasing donor age. In univariate analysis, HCT level≥ 35.5% at the time of PBSC collection was significantly associated with high PBSC number (≥ 5.0 × 10⁶ cells/kg) and donor aged <30 years was significantly associated with collected CD34+ cells ≥ 6.0 × 10⁶/kg, P = 0.03. HCT level ≥35.5% was an independent parameter for high WBC count (≥50 × 10⁹/L), P < 0.05. None of donor who had both HCT < 35.5% and WBC < 50 × 10⁹/L had circulating CD34+ cells ≥ 5.0 × 10⁶/kg. Platelet count ≥ 200 × 10⁹/L was found significantly in donors with WBC ≥ 40 × 10⁹/L (P = 0.03) and HCT ≥ 35.5%, P < 0.05. Collected PBSC number tended to be higher in our donors with high levels of HCT, WBC, and platelet. We also found that HCT and platelet levels in our donors decreased after receiving G‐CSF administration compared with the initial complete blood counts (CBC) results. We, therefore, concluded that HCT level at the time of initiation leukapheresis was an important predictor for PBSC collection yields. J. Clin. Apheresis 30:329–334, 2015. © 2015 Wiley Periodicals, Inc.     

短程大剂量粒细胞集落刺激因子动员外周血造血干细胞的研究

研究短程大剂量粒细胞集落刺激因子对外周血造血干细胞的动员作用。方法采用短程大剂量Ｇ－ＣＳＦ对１１例患者进行外周血造血干细胞动员，Ｇ－ＣＳＦ５μｇ／ｋｇ皮下注射，每日２次，共３天，动员当天及第４天，分别取骨髓及外周血增生明显活跃，外周血白细胞计数明显升高。     

造血干细胞移植在肝脏疾病治疗中的应用与进展

造血干细胞基本来源于骨髓、脐带血及外周血,而终末期肝脏疾病患者身体状况很差,几乎不能耐受较大的创伤,因此用外周血干细胞移植的方法来获得转分化后的肝细胞,是一种很有发展潜力的方法.外周血干细胞移植时如果要获取足够数量的干细胞,必须对外周血进行动员,目前干细胞动员剂分为3种类型:化疗药物、硫酸葡聚糖等聚阴离子制剂、各种重组的人造血细胞刺激因子.对于有着严重肝脏疾病的患者来说,选用各种重组的人造血细胞刺激因子是相对安全的.在造血干细胞的分离方法中,目前应用最广泛的是密度梯度离心法,它可以获得富含单个核细胞的白细胞层,从而初步富集CD34~+细胞.随着针对CD34~+不同抗原决定簇的单克隆抗体的不断发现,准确、大量、快速阳性分选CD34~+细胞的免疫学技术也在迅速开展,如崮相分选技术、流式细胞仪分选等.利用造血干细胞的高度增殖能力及多向分化潜能,对其进行体外扩增和定向诱导分化,从而在短时间内产生大量的早期造血祖细胞,以及定向扩增的多种细胞如肝细胞等而应用于移植,目前应用骨髓造血干细胞转分化为肝细胞己获得成功.为判断在移植器官中真正转分化的细胞是否来源于输注的干细胞,常在移植前对输入细胞进行标记,标记的方法包括荧光标记、特殊染色、基因标记、染色体鉴定等,然后应用免疫学和分子生物学、荧光化学技术加以检测.现阶段应用造血干细胞移植治疗肝脏疾病多为基础实验,临床上尚未得到广泛运用.     

Technical and safety aspects of blood and marrow transplantation using G-CSF mobilized family donors

An allogeneic transplantation programme using immunoselected blood progenitor and bone marrow CD34+ cells has been established. Thirteen healthy HLA-matched, MLC negative sibling donors received two doses of 5 micrograms kg-1 G-CSF (s.c. daily) for 5 days. On days 4 and 5, large-volume mononuclear cell aphereses were performed (COBE Spectra) and on day 5 one unit of autologous blood was obtained. Mononuclear cells were pooled and cryopreserved after CD34+ cell-immunoselection on day 5. Bone marrow (BM) of the same donors was procured under routine conditions 10-45 days later (median: 27 days). The final graft consisted of blood CD34+ cells with either complete BM (n = 5) or immunoselected BM CD34+ cells (n = 8). The present paper describes the progenitor cell mobilization and apheresis protocol and analyzes the cell loss by BM and peripheral blood progenitor cell (PBPC) donation. Considerably larger amounts of mononuclear cells (CD45+), T-lymphocytes (CD3+) and platelets were lost by the apheresis as compared to bone marrow without apparent immediate clinical consequences for the donors. Owing to cross-cellular contamination of the apheresis concentrate, blood platelet count (PC) significantly decreased (mean PC after the second apheresis 116 x 10 microL-1); furthermore on average 3.04 x 10(10) CD3+ cells were removed by two apheresis sessions. This loss did not lead to long-term total lymphocyte count changes (2370 microL-1 versus 1889 microL-1) as observed during the long-term follow-up of 7/13 donors (mean 290 days). Subjectively, the PBPC collections were better accepted than BM donations in all but one family donor.     

自体外周血干细胞移植后血小板恢复的预测指标

目的：寻找更确切、有效、方便的预测自体外周血干细胞移植（ＡＰＢＳＣＴ）后血小板恢复能力的指标。方法：利用巨核细胞集落形成单位（ＣＦＵＭＫ）、流式细胞术等技术检测１７例恶性血液病及实体瘤患者外周血干细胞移植物中巨核细胞前体细胞的数量。结果：①ＣＤ３４＋细胞中同时表达血小板膜糖蛋白者＜５％；②ＣＤ３４＋／ＣＤ４１ａ＋细胞的数量与ＡＰＢＳＣＴ后血小板恢复时间之间的相关性较ＣＤ３４＋细胞数量与血小板恢复时间之间的相关性好；③ＣＦＵＭＫ的数量与血小板恢复之间有较好的相关性；④ＣＤ３４＋／ＣＤ４１ａ＋细胞数量与ＣＦＵＭＫ数量之间具有较好的相关性。结论：移植物中ＣＤ３４＋／ＣＤ４１ａ＋细胞数量及ＣＦＵＭＫ数量均可作为ＡＰＢＳＣＴ后血小板恢复的预测指标，但以前者更方便、可靠     

rhG-CSF体内应用对骨髓和外周血造血干/祖细胞上CXCR-4表达的影响

为了观察rhG-CSF动员对外周血和骨髓造血干/祖细胞上CXCR-4表达的影响,应用三色荧光标记技术对动员前后骨髓和外周血中单个核细胞（MNC）和CD34＋细胞上CXCR-4的表达进行了测定.结果显示,G-CSF动员显著增加了外周血MNC及骨髓CD34＋细胞上CXCR-4的表达,骨髓MNC及外周血CD34＋细胞上CXCR-4的表达无变化,稳态骨髓（SS-BM）中CD34＋细胞比例与G-BM、G-PB中CD34＋细胞比例呈正相关,与采集到的骨髓及外周血中CD34＋细胞/公斤也具有良好的正相关性.结论：G-CSF体内应用后CD34＋细胞上CXCR-4表达的变化可能是动员机制的一部分,CXCR-4的高表达可能有利于MNC的植入,SS-BM中CD34＋细胞的含量可作为动员效果好坏的预测指标.