健康供者造血干细胞动员和采集效果的分析

目的对影响造血干细胞动员和采集效果的多因素进行分析,进一步探讨最佳动员方案及采集时机。方法对94例健康供者采用惠尔血或瑞白5～10μg·kg-1·d-14～5d进行造血干细胞动员,采取相关性分析方法分析供者体重、粒细胞集落刺激因子（G-CSF）动员天数、剂量及采集前外周血淋巴细胞数值与采集效果的关系。结果采集效率与供者体重指数、采集天数、动员剂剂量有关。G-CSF动员第5天采集的供者,其单个核细胞（MNC）数、CD34＋细胞数优于其他时间采集的供者。同时,外周血淋巴细胞数值与采集物MNC比例呈正比。结论应用5～10μg·kg-1·d-1G-CSF动员并于第5天开始采集是健康供者造血干细胞动员的较理想方案。     

G-CSF对供者外周血CD34+细胞黏附分子表达的影响

目的通过观察健康供者外周血CD34+细胞黏附分子表达的变化,探讨粒细胞集落刺激因子(G-CSF)动员的机制及其对供者的影响。方法应用流式细胞仪分析15名健康供者在接受G-CSF10μg.kg-1.d-1动员前(Pre-G)、动员d4和停止动员后7d(Pro-G)外周血CD34+细胞比例及其表面黏附分子非常延迟抗原-5(VLA-5,CD49e)和L-选择素(CD62L)的表达情况。结果G-CSF动员后供者外周血CD34+细胞比例较动员前增高5-10倍,停止动员后恢复至动员前水平。G-CSF动员后CD34+CD49e+细胞比例(97.74%)明显高于动员前(79.95%),停止动员后7d CD34+CD49e+细胞比例基本恢复至动员前水平;CD34+CD62L+细胞比例在G-CSF动员过程中无明显改变;CD34+细胞表面CD49e与CD62L的平均荧光强度于动员后呈减弱趋势,但无显著统计学意义。结论G-CSF动员后d4可显著增加供者外周血CD34+细胞比例,可致CD34+CD49e+细胞比例一过性增加,但不影响CD34+CD62L+细胞群的比例。     

无偿捐献外周血造血干细胞后供者健康状况的研究

目的研究皮下注射粒细胞集落刺激因子(G-CSF)动员剂及捐献外周血造血干细胞(PBSC)对无关健康供者的影响.方法28名外周血造血干细胞捐献者在采集前1～5天,皮下注射粒细胞集落刺激因子5mg/kg,连续1～5天皮下注射,观察G-CSF动员和采集时供者出现的不良反应;并对供者在G-CSF动员前、外周血干细胞采集后的健康状况及血常规进行分析.结果经G-CSF动员并采集了干细胞的28名供者中,23名供者(81.4%)未出现任何不良反应;5名供者(18.6%)出现轻微不良反应,并于采集时或采集后一周内自行消失.28名供者捐献造血干细胞后,经健康状况咨询和体格检查,结果未见异常.供者的血常规大多在捐献的15天后恢复到基础水平,与G-CSF动员前无显著性差异(P＞0.05);但血细胞计数基础值偏低的供者,采集后白细胞和血小板恢复较慢.结论本研究通过对供者捐献造血干细胞后的体检、血常规检测和随访,结果表明无偿捐献造血干细胞对供者是安全的.     

无偿捐献外周血造血干细胞后供者健康状况的研究

目的研究皮下注射粒细胞集落刺激因子(G-CSF)动员剂及捐献外周血造血干细胞(PBSC)对无关健康供者的影响。方法28名外周血造血干细胞捐献者在采集前1~5天,皮下注射粒细胞集落刺激因子5mg/kg,连续1~5天皮下注射,观察G-CSF动员和采集时供者出现的不良反应;并对供者在G-CSF动员前、外周血干细胞采集后的健康状况及血常规进行分析。结果经G-CSF动员并采集了干细胞的28名供者中,23名供者(81.4%)未出现任何不良反应;5名供者(18.6%)出现轻微不良反应,并于采集时或采集后一周内自行消失。28名供者捐献造血干细胞后,经健康状况咨询和体格检查,结果未见异常。供者的血常规大多在捐献的15天后恢复到基础水平,与G-CSF动员前无显著性差异(P>0.05);但血细胞计数基础值偏低的供者,采集后白细胞和血小板恢复较慢。结论本研究通过对供者捐献造血干细胞后的体检、血常规检测和随访,结果表明无偿捐献造血干细胞对供者是安全的。     

单中心191例健康供者应用G-CSF动员造血干细胞的影响因素分析

本研究旨在探讨粒细胞集落刺激因子（G-CSF）动员外周血造血干细胞的影响因素及对健康供者的影响。181例志愿健康供者应用G-CSF5-10μg/（kg·d）动员,10例应用G-CSF3．3-4．9μg/（kg·d）动员,12h1次,连续动员4-5d;采集、检测外周血中单个核细胞（MNC）数与CD34＋细胞数,并观察供者动员及采集过程中的不良反应。结果表明,与动员前相比,动员后（采集前）供者外周血白细胞数平均升高7倍（P〈0．01）;血小板数明显下降（P〈0．01）;血红蛋白含量无明显差异性。动员第4或5天采集效果无差异。男性供者采集的MNC、CD34＋细胞数高于女性（P〈0．01）,高体重供者采集的MNC、CD34＋数高于低体重供者,年龄对采集效果无明显影响。G-CSF剂量与采集效果无线性关系。供者不良反应轻微。结论：G-CSF可以有效动员外周血造血干细胞,供者无明显的不良反应。     

G-CSF联合普乐沙福动员异基因造血干细胞移植亲缘健康供者外周血造血干细胞的单中心分析

目的:研究粒细胞集落刺激因子(G-CSF)联合普乐沙福对异基因造血干细胞移植(allo-HSCT)的亲缘健康供者外周血造血干细胞动员的效果及安全性。方法:回顾性分析2019年4月至2021年4月在河北燕达陆道培医院采用G-CSF联合普乐沙福动员方案的亲缘健康供者33例(观察组),应用G-CSF细胞动员d 4采集骨髓,d 5采集外周血造血干细胞(PBSC),d 5晚加用普乐沙福,并于d 6再次采集PBSC。随机选取历史同期采用单独G-CSF方案动员的亲缘健康供者46例作为对照组,分析2组供者d 5和d 6 PBSC采集物中CD34⁺细胞计数。以调查问卷的方式观察供者普乐沙福给药后的不良反应。分析接受"G-CSF+普乐沙福"动员方案的allo-HSCT患者和仅接受"G-CSF"动员方案的造血干细胞移植患者在移植后100天总a GVHD、Ⅲ-Ⅳ度a GVHD、CMV血症和EBV血症的发生方面的差异。结果:观察组在d 5和d 6 PBSC采集物中CD34⁺细胞数(M±Q)分别为(1.71±1.02)×10⁶/kg和(4.23±2...     

G-CSF动员的供体外周血树突状细胞免疫生物学特性的研究

目的探讨从以G-CSF动员、CS-3000 plus血细胞分离机采集的供者外周血中诱导产生不同特性树突状细胞(DC)的可行性及DC的生物学特性。方法实验组为用CS-3000 plus血细胞分离机采集的5名造血干细胞捐献者的单核细胞(PBMCs),PBMCs培养贴壁后,经含IL-4、GM-CSF的无血清培养基诱导培养7 d,进一步分为4组:未刺激、肿瘤坏死因子α(TNF-α)、IL-10+TNF-α、抗胸腺球蛋白(ATG)+TNF-α组;对照组为5名健康献血者周血,亦按上述条件分组,每组复孔。后2组分别为IL-10、ATG诱导1 d后再加入TNF-α诱导1 d;分别测定各组DC的免疫表型、IL-12(P70)分泌、抗原吞噬以及异基因T淋巴细胞刺激反应。结果诱导培养9 d后可获得非成熟DC(iDC),单纯TNF-α刺激后,HLA-DR、CD11c、CD40、CD80的表达均明显增高,IL-12分泌增加,对异基因T淋巴细胞刺激反应性增强;而IL-10可以使CD1a表达上调,IL-10和ATG均抑制HLA-DR、CD11c、CD40、CD80的表达;与诱导的成熟DC相比,IL-10、ATG诱导DC的IL-12(P70)的分泌、对异基因淋巴细胞刺激反应性均减低,抗原摄取能力增强,但ATG、IL-10诱导的DC生物学特性不完全一致;动员的供体与对照健康献血者诱导的DC在产率,HLA-DR、CD11c表达,成熟诱导后CD11c、CD40、CD80表达,IL-12分泌,异基因T细胞刺激反应性等相比均明显减低。结论G-CSF动员的供体单核细胞PBMCs通过常规诱导可以产生iDC,TNF-α可诱导其分化成熟,IL-10、ATG可以使其获得致耐受的特性;与健康献血者相比,G-CSF动员的供体DC表型和功能部分减低,;虽然动员的供体DC产率不及健康献血者,但血细胞分离机可以可采集到大量的单个核细胞(PBMCs),因此G-CSF动员的外周血有望成为不同DC的重要来源途径。     

经粒系集落刺激因子刺激外周血CD34~+细胞动员效果相关因素的考察

目的探讨粒系集落刺激因子(G-CSF)动员健康供者外周血造血干细胞效果的影响因素。方法对24例健康供者皮下注射G-CSF动员造血干细胞,检测外周血T淋巴细胞亚群和血常规数据。结果经G-CSF刺激后,外周血CD3+(%)、CD3+CD4+(%)、白细胞计数、血小板均明显升高(P0.05);而动员第4天、第5天、第6天骨有核细胞密度、CD34+细胞百分比无明显差别。经相关性分析,性别、年龄、体质量与CD34+细胞百分比呈负相关(P0.05),白细胞计数呈正相关(P0.01)。结论在一定范围内男性供者优于女性供者,年龄越小,体质量越轻,白细胞计数越高,经G-CSF动员的外周血造血干细胞CD34+细胞百分比越高。     

地塞米松对G-CSF动员供体外周血干细胞及其移植受体造血功能恢复的影响

本研究旨在观察不同动员方法对健康供者外周血造血干细胞的动员效果、采集过程中的不良反应及移植后受者造血功能恢复的影响.2008年1月-2013年5月期间本院43例异基因造血干细胞移植供者分为单纯动员和联合动员两组.单纯动员组采用粒细胞集落刺激因子5-10 μg/（kg·d）皮下注射,动员4-6天开始采集;联合动员组在单纯动员基础上于采集前2-4h给予静脉滴注地塞米松10 mg.观察不同组采集的MNC、CD34＋细胞数及其与采集前外周血MNC数的关系,观察采集过程中的不良反应和回输不同组供者造血干细胞后受者造血重建情况.结果表明：两组供者采集造血干细胞数均满足移植需要,单纯动员组采集的MNC及CD34＋细胞数均高于联合动员组.两组采集物中MNC与采集前外周血MNC计数均呈正相关;联合动员组采集后血红蛋白及血小板下降幅度较单纯动员组明显.单纯动员组采集过程中不良反应轻微,可以耐受及逆转,联合动员组未出现不良反应.在两组患者预处理方案无统计学差异的情况下,联合动员组相应的受者造血重建时间较单纯动员组明显缩短.结论：在G-CSF动员供体外周血干细胞时加用地塞米松,可以减少外周血造血干细胞采集的不良反应,可采集到足够的造血干细胞数,采集前外周血中MNC计数仍可以作为评估采集物中MNC高低的一项参考指标,特别是联合地塞米松动员干细胞对于受者造血重建有积极意义.     

捐献外周血造血干细胞供者动员和采集护理

目的:探讨粒细胞集落刺激因子(G-CSF)动员和外周血造血干细胞(PBSC)采集对供者的影响及相应的护理措施。方法:对21例异基因外周血造血干细胞供者采用G-CSF皮下注射5~6 d,使用COBE Spectra血细胞分离机采集外周血干细胞。做好对供者的动员和采集护理。结果:21例供者均顺利完成PBSC动员和采集,所有供者采集总量均达到受者移植细胞数要求。随访1~3个月供者均状况良好。结论:细致的护理可以使PBSC动员、采集期间和移植工作顺利完成。     

Mobilization of dendritic cells and NK cells in non-Hodgkin's lymphoma patients mobilized with different growth factors

Conflicting results have been reported regarding the effect of various growth factors on the mobilization of natural killer (NK) cells and dendritic cells in patients undergoing stem cell mobilization for autotransplantation. We compared the extent of mobilization of NK cells and dendritic cells in non-Hodgkin's (NHL) patients undergoing mobilization with granulocyte colony-stimulating factor (G-CSF), granulocyte-macrophage (GM)-CSF, or GM-CSF followed by G-CSF. Overall, 35 patients were studied. NK cells and dendritic were quantitated by flow cytometry. NK cells were defined as the sum of CD56(+) cells and CD56/CD16(+) cells. Dendritic cells were defined as the sum of CD80(+) and CD80(+)/CD14(+) cells. NK activity was determined by by microcytotoxicity assay. NK activity correlated well with the total amount of CD56(+) cells mobilized to the peripheral blood. Patients in the three arms of the study mobilized similar amounts of NK cells and NK activity, and patients who lacked NK activity in the peripheral blood, before mobilization, lacked NK activity in their apheresis collections. In contrast to NK cell mobilization, mobilization of dendritic cells/kg was three- to five-fold higher in patients mobilized with GM-CSF-containing regimens compared to patients mobilized with G-CSF alone. We conclude that GM-CSF-containing mobilization regimens are superior for dendritic cell mobilization but similar in the mobilization of NK cells. Therefore, we recommend using GM-CSF-containing regimens for patients undergoing ex vivo or in vivo manipulation of dendritic cells.     

The composition of leukapheresis products impacts on the hematopoietic recovery after autologous transplantation independently of the mobilization regimen

BACKGROUND: Effects of mobilization regimen on the composition of leukapheresis products (LPs) and on hematopoietic reconstitution after autologous peripheral blood progenitor cell transplantation (PBPCT) are not well known. STUDY DESIGN AND METHODS: The effects of three different mobilization regimens--stem cell factor (SCF) plus granulocyte colony stimulating factor (G-CSF) plus cyclophosphamide (CCP), G-CSF alone, and G-CSF plus CCP--on the composition of LPs from patients with nonhematologic PBPC malignancies compared to LPs from G-CSF-mobilized healthy donors and normal marrow (BM) samples were analyzed. The impact of LP composition on both short- and long-term engraftment after autologous PBPCT was also evaluated. RESULTS: The most effective regimen for mobilization of CD34+ hematopoietic progenitor cells (HPCs) into peripheral blood was SCF, G-CSF, and CCP, providing the highest numbers of all CD34+ HPCs subsets analyzed. Patients mobilized with SCF plus G-CSF plus CCP showed the highest numbers of neutrophils and monocytes, whereas the highest numbers of lymphocytes and NK cells were observed in LPs from G-CSF-mobilized patients. The overall number of CD34+ HPCs was the strongest factor for predicting recovery of platelets, whereas the number of myelomonocytic-committed CD34+ precursors was the most powerful independent prognostic factor for WBC and neutrophil recovery. The overall number of CD4+ T cells returned showed an independent prognostic value for predicting the occurrence of infections, during the first year after transplant. CONCLUSIONS: The use of different mobilization regimens modifies the overall number of CD34+ HPCs obtained during leukapheresis procedures, and also affects both the absolute and the relative composition of the LPs in different CD34+ and CD34- cell subsets.     

Seasonal variation of human physiology does not influence the harvest of peripheral blood CD34+ cells from unrelated hematopoietic stem cell donors

There are many reports on factors predicting the outcome of PBSC (peripheral blood stem cell) mobilization, such as the donor’s gender, age, weight, white blood cell count, platelets pre apheresis, LDH and iron status. Although there are reports of seasonal variation in the physiology of the human immune system and hematopoiesis there are no data that such differences play a role in the response to G-CSF in healthy hematopoietic stem cell donors. The response to G-CSF could also impact the collection results during different seasons. To assess the possible impact of seasonal variation we performed a retrospective, single-center analysis of mobilization and harvest of PBSC in 330 healthy unrelated donors. We found no significant differences in the number of CD34+ cells in peripheral blood after G-CSF mobilization and in collection results when all donors were analyzed. In the subgroup of male donors the number of CD34+ stem cells after G-CSF mobilization was higher than average in summer and autumn (p = 0.036), however, it did not translate into clinically relevant differences in stem cell harvest.We conclude that although there is possible seasonal variation in the response to G-CSF in male donors there is no impact on PBSC harvest in healthy unrelated donors.     

G-CSF的不同方案动员正常供者外周血干细胞的效果比较

为了研究粒细胞集落刺激因子(rhG-CSF)动员的最佳动员方案,对HLA完全相合的非清髓异基因外周造血干细胞移植的供者60例进行回顾性分析。结果显示:供者rhG-CSF10μg/(kg·d)的动员方案组所采集的单个核细胞及CD34+细胞数明显高于供者rhG-CSF5μg/(kg·d)的动员方案组(P<0.05)。供者rhG-CSF10μg/(kg·d)的动员方案在第4天或第5天采集时所获得的单个核细胞及CD34+细胞数无统计学差别。供者不同rhG-CSF动员剂量及采集时间所获得的CD3+、CD4+、CD8+细胞的百分比无统计学差别。结论:供者10μg/(kg·d)的动员效果明显优于供者5μg/(kg·d)的动员效果。供者10μg/(kg·d)的动员方案在第4天或第5天采集时效果无统计学差异,但第4天采集可缩短动员天数,降低费用,因此对供者采用10μg/(kg·d)动员方案时在第4天采集单个核细胞效果更好。     

中剂量rhG-CSF动员对供者外周血免疫细胞组成的影响

本研究观察12例健康供者在使用10μg/(kg·day)rhGCSF动员前后白细胞总数变化。应用外周血涂片瑞氏染色对白细胞进行形态学分类,使用流式细胞术分析动员前后外周血单个核细胞中T细胞、B细胞、NK细胞和单核细胞比例的变化。结果发现,动员前1天外周血白细胞计数中位数为6.25(4.7-7.8)×109/L,其中淋巴细胞中位数为2.07(1.63-3.1)×109/L,单核细胞中位数为0.163(0.078-0.414)×109/L;动员第5天外周血白细胞计数中位数为37.47(24-72.57)×109/L,其中淋巴细胞中位数为3.22(1.46-5.31)×109/L,单核细胞中位数为1.2(0.706-3.627)×109/L。供者外周血白细胞的增加为动员前的6.26±2.14倍(P<0.01),其中淋巴细胞的增加为动员前的1.45±0.76倍(P<0.05),单核细胞数增加为动员前的7.48±4.41倍(P<0.01)。流式细胞术分析发现,动员前CD3 T淋巴细胞占外周血单个核细胞(PBMNC)比例的中位数为46.96%[(32.36-57.45)%],动员后为40.94%[(25.31-48.9)%];动员前CD4 /CD8 淋巴细胞比例为1.27±0.46,动员后为1.36±0.51;动员前CD4 CD8 T淋巴细胞占PBMNC比例的中位数为0.41%[(0.16-1.51)%],动员后为0.49%[(0.09-2.0)%];动员前CD16 CD56 NK细胞占PBMNC比例的中位数为13.98%[(4.08-25.08)%],动员后为16.65%[(12.06-33.05)%];动员前CD3 CD16 CD56 NK-T细胞占PBMNC比例的中位数为2.75%[(0.37-6.38)%],动员后为3.13%[(0.46-5.95)%];动员前CD20 B淋巴细胞占PBMNC比例的中位数为9.28%[(5.97-16.33)%],动员后为9.94%[(7.36-20.41)%];动员前CD14 单核细胞占PBMNC比例的中位数为12.48%[(3.54-19.35)%],动员后为29.52%[(16.51-36.76)%]。动员后CD14 单核细胞在PBMNC中的比例比动员前增加2.87±1.51倍(P<0.05);动员前后T淋巴细胞、NK细胞、NK-T细胞、B淋巴细胞在PBMNC中的比例以及动员前后CD4 /CD8 淋巴细胞比均无显著变化(P>0.10)。结论:rhGCSF动员引起的单核细胞增加可能在异基因外周血造血干/祖细胞移植的相关事件中发挥着重要作用。     

Harvesting peripheral blood stem cells from healthy donors on 4th day of cytokine mobilization

A pilot study was conducted to evaluate the efficacy of harvesting peripheral blood stem cells from normal healthy donors on day 4 after mobilization with G-CSF at 10 microg/kg for 4 days or a sequential combination of GM-CSF at 10 microg/kg for 2 days and G-CSF at 10 microg/kg for 2 more days. Harvesting over the target dose (>4 x 10(6) kg) of CD34+ cells based on the lst leukapheresis performed on day 4 was possible from 7 (53.8%) out of 13 donors. The 7 matched recipients all exhibited early engraftment, except for one who experienced transplant-related mortality, and no differences were observed with the recipients transplanted with stem cells harvested after a 5-6-day growth-factor (GF) treatment. Accordingly, harvesting from normal healthy donors on day 4 after mobilization treatment with a GF was found to be feasible for allogeneic peripheral blood stem cell transplantation and more economical in terms of the cost of the GF and the donor's commitment.     

低剂量rhG-CSF对56例非血缘供者外周造血干细胞动员

本研究观察低剂量人重组粒细胞集落刺激因子(rhG-CSF)对非血缘健康供者的影响,探讨用于中华造血干细胞捐赠者资料库提供的非血缘健康供者外周造血干细胞动员方案。56例非血缘健康供者接受rhG-CSF 5μg/(kg.d)皮下注射,在动员第4、5两天或第5、6两天采集干细胞,观察动员效果及不良反应,检测动员前后血常规指标、CD3+、CD4+、CD8+和CD20+细胞比例;对采集物进行单个核细胞(MNC)和CD34+细胞计数;对所有供者随访至2006年5月31日。结果显示:在rhG-CSF动员过程中出现1级毒副作用(按WHO分级标准):腰背酸痛17.9%(10/56)、焦虑失眠8.9%(5/56)、疲乏4.5%(3/56)等,无需特殊处理,无需终止动员。第4、5两天采集和第5、6两天采集所得的MNC分别是(5.95±1.52)×108/kg和(7.19±2.12)×108/kg;CD34+细胞分别是(3.03±1.09)×106/kg和(7.92±2.50)×106/kg。血红蛋白水平、血小板量、CD3、CD4、CD8、CD20百分比动员前后无变化。结论:5μg/(kg.d)rhG-CSF用于非血缘健康供者的动员是安全而有效的。     

重组人G-CSF对健康供者外周造血干／祖细胞动员和采集效果的影响因素分析

应用重组人粒系集落刺激因子（rhG—CSF）对健康供者进行动员并采集造血干细胞用于异基因外周血造血干细胞移植已在临床广泛应用，本研究通过对影响外周干细胞动员和采集效果的多因素分析，进一步探讨最佳动员方案及采集时机。采取回顾性方法分析了431例健康供者外周血干细胞动员采集效果，并进一步分析了供者一般特征、rhG—CSF动员天数、每日皮下注射次数、剂量与采集效果的关系。结果表明：rhG—CSF在动员中平均应用剂量为5．7μg／（kg·d），平均采集1．7次，收获单个核细胞数平均为9．57×10^8／kg，CD34^＋细胞平均为4．91×10^6／kg。绝大多数供者不良反应轻微。多因素分析结果显示，采集效率主要与供者体重指数，采集天数相关。rhG—CSF动员第5天采集的供者，其MNC数、CD34^＋细胞数及第一次单采成功率均优于其他时间采集的供者。同时，本组供者应用rhG—CSF剂量较小且剂量范围较窄，rhG—CSF剂量不如采集时间对采集物质量的影响明显。结论：小剂量应用rhG—CSF动员并于第5天开始采集是健康供者造血干细胞动员的较理想方案。     

Peripheral Blood Allogeneic Stem Cell Mobilization: Can We Predict a Suboptimal Mobilization?

Allogeneic peripheral blood stem cells mobilization is now the basis of most stem cell transplants. In a very limited number of cases, mobilization is suboptimal leading to further collection procedures, to suboptimal cell doses infusion with delayed engraftment time, increased risks of transplant procedure and of related costs. To date we have no recognized and shared criteria for early estimating the probability of poor mobilization in healthy donors. We then analyzed allogeneic peripheral blood stem cell donations performed at the Fondazione Policlinico Universitario A.Gemelli IRCCS Hospital from January 2013 to December 2021 in order to identify premobilization factors associated with successful mobilization. The following data were collected: age, gender, weight, complete blood cell count at baseline, G-CSF dose, number of collection procedures, CD34+ cell count in peripheral blood on the first day of collection, CD34+ cell dose per kg body weight of recipient. Mobilization efficacy was defined according to the number of CD34+ cells in peripheral blood on day +5 of G-CSF administration. We classified donors as sub-optimal mobilizers or good mobilizers according to the achievement of the 50 CD34+ cell/μL threshold. We observed 30 suboptimal mobilizations in 158 allogeneic peripheral blood stem cell donations. Age and baseline white blood cell count were factors significantly associated with negative or positive impact on mobilization, respectively. We did not find significant differences in mobilization based on gender or G-CSF dose. Using cut-off values of 43 years and 5.5×10⁹/L WBC count, we built a suboptimal mobilization score: donors who reach 2, 1 or 0 points have a 46%, 16% or 4% probability of suboptimal mobilization, respectively. Our model explains 26% of the variability of mobilization confirming that most of the mobilization magnitude depends on genetically determined factors; however, suboptimal mobilization score is a simple tool providing an early assessment of mobilization efficacy before G-CSF administration begins in order to support allogeneic stem cells selection, mobilization and collection. Through a systematic review, we looked for confirmation of our findings. According to the published articles, all the variables we included in our model are confirmed to be strongly related to the success of mobilization. We believe that score system approach could be applied in clinical practice to assess the risk of mobilization failure at baseline allowing for a priori intervention.