移植物中CD34+细胞及T细胞亚型对HLA相合同胞异基因外周血造血干细胞移植预后的影响

目的 探讨移植物中CD34+细胞及T细胞剂量对HLA相合同胞异基因外周血造血干细胞移植(allo-PBSCT)预后的影响.方法 流式细胞术检测移植物中CD34+细胞,CD3+、CD3+CD4+及CD3+CD8+T细胞含量,按患者体重计算出移植物中单个核细胞(MNC),CD34+细胞,CD3+、CD3+CD4+及CD3+CD8+T细胞数量,根据中位数分别将患者分为高剂量组和低剂量组,比较高剂量和低剂量组患者移植后造血重建、移植物抗宿主病(GVHD)、移植相关死亡(TRM)、复发、总体生存(OS)率以及无病生存(DFS)率的发生情况.结果 CD34+细胞高剂量组(34例)移植后中性粒细胞和血小板的恢复速度显著加快(P值均<0.05).CD3+CD4+、CD3+CD8+T细胞高剂量组和相应低剂量组相比,Ⅱ-Ⅳ度aGVHD发生率有增高趋势(P值分别为0.089和0.098).CD3+CD4+及CD3+CD8+T细胞高剂量组和相应低剂量组相比,TRM显著增高(P值均<0.05);多因素分析显示,CD3+CD4+和CD3+CD8+T细胞输注剂量是患者TRM的影响因素(RR分别为13.12和25.90,P值均<0.05).各高剂量组和相应低剂量组比较复发率差异无统计学意义(P值均>0.05).CD3+ CD4+及CD3+CD8+T细胞高剂量组分别和相应低剂量组相比,OS显著降低(P值均<0.05);多因素分析显示,CD3+CD4+和CD3+CD8+T细胞输注剂量是患者OS的影响因素(RR分别为3.71和3.01,P值均<0.05);CD3+CD4+T细胞高剂量组和低剂量组相比,DFS显著降低(P值均<0.05);多因素分析显示,CD3+CD4+T细胞输注剂量(RR=6.91,P=0.011)是患者DFS的影响因素.结论 高剂量CD34+细胞移植可加快移植后造血重建;移植物中高含量的CD3+CD4+及CD3+CD8+T细胞会增加患者TRM,降低OS或DFS.     

Collection of two peripheral blood stem cell concentrates from healthy donors

When peripheral blood stem cell (PBSC) concentrates are used for allogeneic transplants, two or more apheresis procedures must often be performed. To determine how many cells could be collected from healthy people by two back-to-back apheresis procedures and what effect these collections would have on donors, we gave 19 healthy people 5 micrograms kg-1 day-1 and 21 people 10 micrograms kg-1 day-1 of granulocyte colony stimulating factor, filgrastim, for 5 days. We then collected two PBSC concentrates, one on day 5 and one on day 6. A third group of six people was given filgrastim 10 micrograms kg-1 day-1 for 5 days but had no PBSC concentrates collected. PBSC concentrate cell counts and donor cell counts, symptoms, and blood chemistries were assessed for up to 1 year. On day 5, three times more CD34+ cells were collected from donors given 10 micrograms kg-1 day-1 than those given 5 micrograms kg-1 day-1 (P = 0.009) but on day 6 the quantity of cells collected was the same (P = 0.23). The total number of CD34+ cells collected was two times greater in donors given the higher dose of filgrastim (median = 579 x 10(6); range = 174-1639 x 10(6) compared to 237 x 10(6); 103-1670 x 10(6); P = 0.061). Platelet counts fell after each PBSC concentrate collection, but there were no differences between the two groups of donors in platelet counts measured immediately after each collection. The platelet counts also fell in people who did not donate PBSC concentrates. The lowest counts in all three groups of people also occurred on day 10. In PBSC donors given 10 micrograms kg-1 day-1 of filgrastim the absolute neutrophil count (ANC) fell below premobilization counts on day 14. In donors given 5 micrograms kg-1 day-1 the ANC fell below premobilization counts on days 21, 28 and 49, CD34+ cell counts were significantly lower than premobilization counts on days 14 and 28 in donors given 10 micrograms kg-1 day-1 of filgrastim and on day 14 in those given 5 micrograms kg-1 day-1. No decrease in neutrophil or CD34+ cell counts occurred after filgrastim was given in the people who did not donate PBSC concentrates. The incidence of symptoms was similar in both groups of PBSC concentrate donors, except that those given 10 micrograms kg-1 day-1 were more than twice as likely to experience myalgias as those receiving the lower dose (P = 0.029). Several blood chemistries changed. Levels of alkaline phosphatase, LDH, SGPT, SGOT, uric acid and sodium increased. Levels of bilirubin, total protein, potassium, calcium and chloride decreased. In conclusion, twice as many CD34+ cells were collected from donors given 10 micrograms kg-1 day-1 of filgrastim. Platelet, neutrophil and CD34+ cell counts fell after the PBSC concentrate collections. The fall in platelet counts was due to both the collection and the administration of filgrastim. The falls in neutrophil and CD34+ cell counts were due to the loss of haematopoietic progenitor cells in the PBSC concentrates. Allogeneic PBSC concentrate donors should be given 10 micrograms kg-1 day-1 of filgrastim, and if possible only one component should be collected in order to avoid thrombocytopenia.     

ABO血型不合的异基因造血干细胞采集及移植效果研究

本研究评价COBE Spectra血细胞分离机按干细胞采集程序采集HLA配型相合、ABO血型不合供者外周血造血干细胞的效能,观察未去除红细胞和(或)血浆进行异基因外周血干细胞移植的效果。应用COBE Spectra血细胞分离机的自动干细胞采集程序采集28例异基因供者外周血干细胞,并选用同期ABO血型相合15例作对照。检测采集物有核细胞(NC)数、单个核细胞(MNC)比例及CD34+细胞计数,观察造血功能重建情况和转变为供者血型所需要的时间。结果表明,ABO血型不合和相合组采集物中的NC、CD34+细胞数、MNC比例无统计学差异(p>0.05)。ABO血型不合组和相合组中性粒细胞和血小板恢复的时间无统计学差异(p>0.05)。14例ABO血型主要不合患者,红系造血明显延迟,ABO血型不合组28名患者于移植后35-193天血型成功转变为供者型,和ABO血型相合组相比均有统计学差异(p<0.01)。结论:ABO血型不合不是异基因造血干细胞移植的障碍,主要不合可能是红系造血明显延迟的主要原因。     

同胞异基因外周血干细胞移植治疗多发性骨髓瘤10例疗效观察

目的 观察同胞HLA配型相合的异基因外周血干细胞移植(allo-PBSCT)治疗多发性骨髓瘤(MM)的疗效.方法 10例MM患者采用氟达拉滨联合马法兰和环磷酰胺等为主的预处理方案行allo-PBSCT.其中8例患者采用环孢素加霉酚酸酯和短程甲氨蝶呤,2例采用普乐可复(FK506)加短程甲氨蝶呤预防移植物抗宿主病(GVHD).结果 所有患者造血细胞均成功植入,中性粒细胞＞0.5×109/L的中位时间为移植后16(12～24)d,PLT＞20×109/L的中位时间为移植后23( 16～102)d.发生急性GVHD5例,其中仅1例发生了Ⅲ度以上急性GVHD.9例MM患者中7例发生慢性GVHD.100 d内移植相关死亡1例,死因为心、肾功能衰竭和严重感染.1年预期存活率为67.5％,1年无病生存率为55.56％,复发率为11.11％.至今存活6例患者,其中1例已无病生存达99个月.结论 allo-PBSCT在MM中的作用尚需进一步评估,但对于年轻有合适供者的MM患者,以氟达拉滨为基础的allo-PBSCT预处理方案,耐受性好,有可能通过降低移植相关死亡率提高总体生存率.     

HLA相合同胞和不全相合血缘关系供者造血干细胞移植的临床对比研究

目的 通过与HLA 6/6位点相合同胞供者异基因造血干细胞移植(allo-HSCT)的对比研究,探索HLA不全相合的血缘关系供者allo-HSCT治疗血液系统疾病的可行性.方法 30例血液系统疾病患者接受HLA 1～3个位点不合血缘关系供者allo-HSCT(HLA不合组),全部在预处理中加用兔源抗胸腺细胞球蛋白(ATG)(总量10 mg/kg,～4 d～～1 d静脉输注);28例接受HLA 6/6位点相合同胞供者HSCT(HLA相合组),5例(18%)应用ATG.两组均采用G-CSF动员十细胞和环孢素A+短程甲氨蝶呤+霉酚酸酯预防移植物抗宿主病(GVHD).结果 两组患者移植后均获得造血重建.HLA不合组与HLA相合组Ⅱ～Ⅳ度急性GVHD的累积发生率分别为34%和32%(P=0.98),Ⅲ～Ⅳ度急性GVHD的累积发生率分别为13%和11%(P=0.84).HLA不合组和HLA相合组的3年总生存(OS)率分别为57%和77%(P=0.14),3年无病生存(DFS)率分别为57%和69%(P=0.28).多因素分析显示移植前的疾病状态(P=0.006)和CMV感染(P=0.04)是影响OS的危险因素.处于疾病稳定期的患者,HLA不合组和HLA相合组的OS率相近(分别为87%和81%,P=0.65);处于疾病进展期的患者,HLA不合组的OS率明显低于HLA相合组(分别为21%和71%,P=0.02).结论 对于缺乏同胞HLA配型相合供者的疾病稳定期患者,进行HLA不全相合血缘关系供者的allo-HSCT是可行的.疾病进展期患者进行HLA不全相合血缘关系供者allo-HSCT风险性高,应通过改良预处理方案和加强移植后支持治疗以提高患者疗效.     

Tailored strategy for AML patients receiving allogeneic peripheral blood stem cell transplantation

Considering the heterogeneity of acute myelogenous leukemia (AML), along with the pros and cons of allogeneic peripheral blood stem cell transplantation (PBSCT), a tailored strategy is needed to minimize the transplant-related mortality and maximize the transplant outcomes in AML patients exhibiting certain factors that have an impact on the post-transplant quality of life and outcomes. The factors that need to be considered when tailoring a strategy in an allogeneic PBSCT setting include the recipient's performance status and co-morbid disease include AML risk stratification, disease status, expected severity of graft-versus-host disease, and the necessity of a graft-versus-leukemia effect. Accordingly, this review article describes a possible tailoring strategy for AML patients receiving allogeneic PBSCT based on certain factors influencing the transplant outcome.     

同种异体骨复合自体骨髓干细胞移植治疗良性骨肿瘤和瘤样病变

背景：同种异体骨是临床常用的骨移植材料,但缺乏诱导成骨能力是最大的问题。目的：评价良性骨肿瘤及瘤样病变刮除或切除后应用同种异体骨复合自体骨髓干细胞修复骨缺损的效果。方法：65例良性骨肿瘤(包括瘤样病变)患者,根据植骨情况分为2组。复合骨髓干细胞植骨组35例患者根据预计植骨量从每位患者两侧的髂前上棘或髂后上棘抽取红骨髓20-40 mL,经体外分离、纯化、培养扩增骨髓基质干细胞备用,在植骨前将同种异体骨颗粒与骨髓基质干细胞充分混匀。肿瘤刮除或切除后,将混匀的骨髓基质干细胞与同种异体骨颗粒,植入骨缺损区内。单纯植骨组将用生理盐水浸泡半小时的同种异体骨植入骨缺损区内。分别于治疗后1,3,6,12个月进行植骨区X射线检查,比较两组病例同种异体骨颗粒界限模糊、消失的时间,同时观察术后并发症发生情况。结果与结论：62例患者均获得12个月以上随访。复合骨髓干细胞植骨组移植骨界限模糊时间和消失时间均短于单纯植骨组(P <0.05)。复合骨髓干细胞植骨组1例出现排异反应,使用免疫抑制剂治疗2周后痊愈,两组病例均未出现感染。结果表明同种异体骨复合自体骨髓干细胞植骨能明显促进骨融合和骨缺损的愈合。     

Predictive parameters for granulocyte colony-stimulating factor-induced peripheral blood stem cell mobilization

To improve the selection of donors for allogeneic stem cell transplantation, it is important to identify reliable parameters that predict CD34+-cell yields after granulocyte-colony stimulating factor (G-CSF)-induced peripheral blood stem cell (PBSC) mobilization. We retrospectively investigated the peripheral blood (PB) kinetics of white blood cells (WBCs), CD34+ cells, matrix metalloproteinases (MMP)-9 and -2, and tissue inhibitors of metalloproteinases (TIMP)-1 and -2 in 15 healthy donors during their treatment with G-CSF. All donors received 10 microg/kg of recombinant human G-CSF once a day subcutaneously. Leukapheresis was initiated after 4 days of G-CSF treatment, and G-CSF treatment continued until the last day of leukapheresis. WBC and CD34+ cell numbers in the PB rose after 2 and 3 or 4 days of G-CSF treatment, respectively. The PB CD34+ cell numbers on day 4 correlated weakly with the increase in WBC counts from day 1 to day 2 (R(2) = 0.254, P = 0.056). There were also positive correlations between the CD34+ cell numbers in the PBSC products on day 4 and the CD34+ cells in the PB on days 1 and 4 (R(2) = 0.768, P < 0.0001 and R(2) = 0.816, P < 0.0005, respectively). The MMP-9 plasma levels on days 1 and 4 also correlated positively with the day 4 circulating CD34+ cell numbers (R(2) = 0.393, P < 0.05 and R(2) = 0.406, P = 0.01, respectively). In conclusion, the CD34+ cell numbers in the PB steady state may be a useful parameter selecting allogeneic PBSC donors.     

受体骨髓干细胞于大鼠移植肝内向血管内皮细胞分化的实验研究

目的:研究受体骨髓干细胞在大鼠移植肝中向血管内皮细胞(VECs)的分化情况及其对大鼠原位肝脏移植术后早期排斥反应的影响。方法:用双袖套法建立大鼠原位肝移植模型,供体为雌性Wistar大鼠,受体为雌性SD大鼠。受鼠随机分为对照组(n=6)和实验组(n=12)。其中对照组仅行原位肝移植,实验组于术中经门静脉注射雄性SD大鼠骨髓干细胞0.5mL(1×107/mL)。实验组再随机分为3组,每组4只,分别在术后第7、14、21天切取肝脏,并行Sry原位杂交结合vonWillebrand因子(vWF)免疫组化的双标染色,观察受体骨髓干细胞向VECs转化的情况,同时观察术后早期的病理变化。结果:实验组术后一般情况明显优于对照组。实验组于术后第7天在肝组织内发现Sry与vWF双染阳性细胞,该细胞于第14和21天在血管壁出现。对照组肝脏病理学检查为急性重度排斥反应,实验组为急性轻到中度排斥反应。结论:受体骨髓干细胞能在移植肝的环境中诱导分化为VECs,表达vWF,并可部分替代移植肝本身的VECs;经门静脉输注受体骨髓干细胞可减轻移植肝的急性排斥反应。     

芜湖市非亲缘外周血造血干细胞捐献志愿者招募情况调查

目的:探讨芜湖市非亲缘外周血造血干细胞(PBSC)捐献志愿者的招募情况。方法:选择2007-2020年,安徽省芜湖市中心血站招募的3 810例PBSC捐献志愿者中,人类白细胞抗原(HLA)低分辨配型全相合,并且同意参加高分辨配型的75例志愿者为研究对象,并且纳入研究组。采用整群随机抽样方法,选择本站2007-2020年...     

不同的造血干细胞移植方式对重型再生障碍性贫血治疗效果的影响

目的:比较异基因外周造血干细胞移植(Allo-PBSCT)、异基因骨髓移植(Allo-BMT)及Allo-PBSCT和Allo-BMT混合移植3种不同的移植方式治疗重型再生障碍性贫血(SAA)的临床效果。方法:37例SAA患者接受了同胞人类白细胞抗原(HLA)全相合异基因干细胞移植,其中Allo-PBSCT组11例,Allo-BMT组14例,混合移植组12例。观察所有患者移植近期中性粒细胞(Neu)和血小板的造血时间、短小片段重复序列(STR)植入状况、粒细胞缺乏(粒缺)合并感染的发生率、急慢性移植物抗宿主病(GvHD)发生率,以及远期3年植入失败率、病死率和无病生存率。结果:Allo-PBSCT组、Allo-BMT组、混合移植组的Neu造血时间分别为(13.5±2.3)d、(21.2±3.5)d和(14.7±2.4)d,血小板造血时间分别为(24±4)d、(22±5)d和(23±5)d,Allo-PBSCT组和混合移植组的Neu造血时间均短于Allo-BMT组(P均<0.05),而3组间血小板平均造血时间比较差异无统计学意义。3组所有患者在移植后第28日时检测STR均证实为完全供者嵌合体。Allo-PBSCT组和混合移植组粒缺合并感染发生率分别为9%和17%,均明显低于Allo-BMT组的57%(P均<0.05);Allo-PBSCT组GvHD总发生率(包括急性和慢性)为36%,与均无GvHD发生的Allo-BMT组及混合移植组比较差异具统计学意义(P均<0.05);Allo-PBSCT组3年的植入失败率、病死率和无病生存率分别为36%、9%和64%,混合移植组和Allo-BMT组所有患者3年内均无病生存、STR均表现为稳定植入,Allo-PBSCT组3年植入失败率高于混合移植组和Allo-BMT组(P均<0.05),3年无病生存率低于混合移植组和Allo-BMT组(P均<0.05)。结论:在上述3种不同的移植方式中,混合移植同时具有Neu重建快、粒缺合并感染发生率低、GvHD发生率和植入失败发生率低、无病生存率高等优点,临床上可以优先考虑采用此方式进行治疗。     

自体骨髓干细胞移植术治疗终末期肝硬化患者疗效观察

目的 探讨自体骨髓干细胞经肝动脉移植治疗乙型肝炎肝硬化失代偿期的安全性、可行性及疗效.方法 本研究纳入了64例乙型肝炎肝硬化失代偿期的患者,其中32例患者接受了自体骨髓干细胞移植治疗,同时选取与移植组在年龄、性别以及某些生化指标[包括丙氨酸氨基转移酶（ALT）,白蛋白（ALB）,总胆红素（TBIL）,凝血酶原时间（PT）]相匹配的32例患者作为对照组.采集骨髓150～250ml,分离纯化骨髓干细胞,经肝动脉插管植入肝脏,观察植入治疗术前及术后第1周到第4周主要肝功能指标及临床症状的变化、不良反应.结果 32例患者骨髓干细胞的采集、分离以及灌注均顺利,成功率为100％.术后未观察到严重的不良反应或并发症.与对照组相比,移植组在术后第1～4周ALT、TBIL、ALB、PT水平无显著性差异（P＞0.05）;当患者Child-Pugh分级均为ChildA ＋B级时,移植组患者在术后第1～4周肝功能指标的变化较对照组有所改善,但差异无统计学意义（P＞0.05）;当患者Child-Pugh分级均为Child C级时,两组ALT水平仍无显著性差异（P＞0.05）,而从移植术后第3～4周时,移植组中ALB、PT和TBIL水平较对照组有显著改善（P＜0.05）.结论 经肝动脉自体骨髓于细胞移植术治疗乙型肝炎肝硬化失代偿期安全有效,短期内即可改善肝功能Child C级患者的临床症状和体征,从而使患者生存质量得到较大提高,具有推广价值.     

ABO血型不合的同胞异基因外周血干细胞移植

目的探讨HLA配型相合、ABO血型不合的同胞异基因外周血干细胞移植(alloPBSCT)的疗效。方法对27名HLA配型相合、ABO血型不合的血液恶性肿瘤患者作同胞alloPBSCT(实验组,供、受者ABO血型主侧不合的有15例,次侧不合的有10例,主次侧均不合的有2例),其中急性髓细胞白血病(AML)6例、急性淋巴细胞白血病(ALL)8例、慢性粒细胞性白血病(CMLLP)10例、骨髓增生异常综合征(MDSRAEBT)2例、非霍奇金氏淋巴瘤(ⅣB)1例;并选用同期的35名ABO血型相合的移植患者作比较(对照组)。移植物抗宿主病(GVHD)的预防采用霉酚酸酯(MMF)、环孢菌素A(CSA)和短程甲氨喋呤(MTX)三联预防方案。结果62例全部造血重建。实验组:27名alloPBSCT患者均未出现急性溶血反应,主侧不合者红系造血明显延迟,供/受者血型为A/O的患者中有3例(3/7)发生纯红细胞再生障碍性贫血(PRCA),27名患者于移植后25～153d血型成功转变为供者型;实验组GVHD发生率、VOD发生率、CMV感染、HC发生率及疾病复发率、死亡率与对照组相比差异无统计学意义(P>0.05)。结论ABO血型不合可以进行alloPBSCT,并且不影响干细胞移植的植活、GVHD及其它移植相关并发症的发生和预后。供/受者血型为A/O是主侧ABO血型不合患者alloPBSCT后PRCA发生的高危因素。     

Identification of megakaryocyte precursors in peripheral blood stem cell collections from normal donors

Platelet engraftment, the time course and magnitude of platelet recovery (PR) post-transplant, is imprecisely defined but is most often reported as the time to transfusion (tx) independence and/or a platelet count ⩾20,000/μl. While correlations between engraftment time for granulocytes (PMN) and the dose of CD34-positive cells per kilogram are established, such associations have not been established for platelet engraftment. The objective of this study was to quantify subpopulations of CD34-positive cells in peripheral blood stem cell (PBSC) collections of normal, colony-stimulating factor-granulocyte) (G-CSF) primed donors that might represent megakaryocyte (MK) precursors, and to determine whether there is a statistical association between the dose transfused and the time course of the recovery. Based on previously published data of the sequential expression of CD34, HLA-DR, and CD61, among others, during MK maturation, a combination of corresponding antibodies for the detection of various antigen coexpressions by flow cytometry fluorescence-activated cell sorting [FACS] was chosen. CD34-positive cells were further subdivided into CD34++ (bright) and + (dim). Ploidy of density-gradient separated cells was examined in subsequent donor samples by FACS. For the entire group of patients, there was no strong correlation between any of the studied subpopulations and time to PR. Only in a selected groups of patients whose platelet counts showed a sustained increase during the first 6 days after engraftment, there was a weak correlation between the time to PR and the quantity of CD34+/+CD61+ (r = −0.57) and CD34++HLA-DR-CD61+ (r = −0.62) cells infused. The magnitude of platelet production in these pt., a product of the peripheral blood platelet count and the patient's blood volume, was correlated with the time to PR (r = −0.73). We conclude from this study that subpopulations within CD34+ cells are making some contribution to PR in allogeneic peripheral blood stem cell transplantation, but the correlations are not sufficiently strong because there are probably too many unpredictable and unknown variables in the allogeneic setting that influence the pattern of engraftment. J. Clin. Apheresis 13:7–15, 1998. © 1998 Wiley-Liss, Inc.     

The psychosocial aspects of donating blood stem cells: the sibling donor perspective

The collection of peripheral blood progenitor cells (PBPC) by apheresis has become common in related allogeneic donors. However, the acceptability of the procedure to donors has not been documented. The purpose of this baseline case series study was to evaluate the psycho-social dimensions of apheresis from the perspective of healthy sibling donors and to explore issues surrounding fully informed consent including voluntary donation. At the first interview to discuss donation, 17 consecutive human leucocyte antigens (HLA) identical sibling donors who chose to donate PBPC were recruited to the study. They then completed both scales of the State-Trait Anxiety Inventory. The state scale was completed again immediately before first apheresis. At the end of the final apheresis, the donors were interviewed again by an independent researcher using a standardised questionnaire. All aspects of the procedure were well tolerated, including levels of anxiety and pain. Donors donated even if the relationship with their sibling was poor. However, some areas for improvement were highlighted. Eight (47%) donors were asked to donate by their sibling or another close relative, and this gave them no real volunteer status. Written information was judged important by 11 (65%) donors, but the material used was limited. The possibility of a poor outcome for the recipient was not well understood. The content of the written documentation and the management of confidentiality in terms of donor volunteer status needed to be addressed. A further study regarding the follow-up needs of donors, including those where the outcome is poor, is underway.     

Predictive factors that affect the mobilization of CD34(+) cells in healthy donors treated with recombinant granulocyte colony-stimulating factor (G-CSF)

No specific characteristics have been identified as predictors of peripheral blood stem cells (PBSC) mobilization in healthy donors. In this study, clinical characteristics and laboratory data for 122 healthy donors who underwent apheresis on day 5 of treatment with recombinant granulocyte colony-stimulating factor (G-CSF) were retrospectively analyzed for correlations with CD34(+) cell mobilization. The variables that were analyzed included age, sex, body weight, basal complete blood count, and maximum white blood count (WBC) before apheresis, G-CSF type, and dosage. Median age and body weight were 42.5 years (range 16-65) and 72.5 kg (range 47-121), respectively. By univariate analysis, male sex (P = 0.007), body weight (< or = 70 vs. >70 kg, P = 0.04), and donor's age (< or = 50 vs. > 50 years; P = 0.015) were correlated with the number of CD34(+) cells mobilized. By multivariate analysis, donor's age and male sex were the only two variables that significantly predicted a high CD34(+) cell level. In conclusion, our data suggest that male sex and younger age are the only factors that significantly affect CD34(+) mobilization in healthy donors.     

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.     

超声心动图评价干细胞移植对心肌梗死大鼠左心室功能的影响

目的采用二维超声心动图和组织多普勒超声心动图评价骨髓干细胞(bonemarrow-drivedmesenchymalstemcells,MSCs)移植前后大鼠的心脏形态和左心功能,为干细胞移植治疗心肌梗死的临床应用提供参考数据。方法40只Wistar大鼠随机分为对照组和移植组。应用液氮冷冻法制作心肌梗死模型后,移植组大鼠心肌内注射经5-氮胞苷诱导后的MSCs。手术前、术后1周、术后1个月分别应用二维超声心动图和组织多普勒显像测定两组大鼠的心脏功能。结果术后1个月移植组和对照组大鼠分别存活13只和15只。数据分析表明:移植组术后1个月,大鼠心脏功能与术后1周时相比明显改善(P<0.05),而对照组无改善。结论诱导后的MSCs移植到心肌梗死区及其周围可防止心功能恶化,改善心脏功能。MSCs移植可能成为治疗心肌梗死的一种切实有效的方法。