小鼠粒-单系祖细胞体外培养的透射电镜观察

用液体法培养了C_(57)BL/6J小鼠CFU—GM,并对其进行透射电镜观察,发现在2～6天培养时间内各期集落的细胞组成不同,CFU—GM在体外发育过程中细胞核、线粒体、粗面内质网、游离核糖体、高尔基复合体.糖原颗粒及颗粒的发育有特征性变化,与体内的成熟规律有些差异。同时讨论了粒系细胞与单系细胞的区别.     

骨髓基质细胞体外扩增能力及支持造血的研究

目的 :观察成纤维细胞集落形成单位 (CFU- F)贴壁层的形成、体外传代培养、扩增的情况 ,研究各阶段 (CFU- F)对粒 -单核细胞集落形成单位 (CFU- GM)和红细胞集落形成单位 (CFU- E)生长及细胞因子对造血的支持作用 ,并测定骨髓有核细胞对基质细胞的粘附能力。方法 :利用改进的液体培养法 ,培养骨髓基质细胞并传代 ,利用甲基纤维素半固体培养法 ,培养人骨髓细胞 ,观察 CFU- GM、CFU- E集落数。结果 :人骨髓基质细胞在体外可以传代培养 4代并能扩增 2 8倍 ,其中 F3代对 CFU- GM和 CFU-E的促进增殖作用最强 ,且对骨髓有核细胞的粘附能力最强。结论 :人骨髓基质细胞可体外传代扩增并支持造血细胞生长     

造血干细胞的实验研究及临床应用(四)

<正> 三、慢性粒细胞性白血病及骨髓增生性疾患慢粒时GM—CFUc明显升高。骨髓中5-10倍于正常。血中50—100倍于正常(Metcalf(1977)报道高达2000倍于正常)。外周血低漂浮密度的GM—CFUc增多,低于1.060克/立方厘米者可达60—70%。外周血及骨髓细胞培养形成正常集落,丛与集落比例正常。集落细胞接近正常的分化与成熟。集落细胞ph_1阳性,无ph_1~+与ph_1~-细胞并存。细胞周期延长,S期细胞百分比降低(低于10%),对低浓度CSF的反应性低于正常。马利兰治疗后外周血GM—CFUc降至正常,但骨髓仍略高于正常。急变时生长型与急粒复发时类同(Moore1973,     

豚鼠胸腺与骨髓细胞混合培养体外造血的研究

本文对豚鼠胸腺与骨髓细胞混合培养,及其体外造血、上悬液中成纤维细胞集落生成细胞(FCFC)的再次培养,底层贴壁的基质祖细胞(CFU—F)分泌成集落刺激因子(CSF),粒一巨噬系祖细胞(CFU—GM)培养等进行了初步研究,并对胸腺与骨髓混合培养体外违血的作用机制进行了观察和讨论。     

脐血单个核细胞体外扩增的实验研究

目的 :采用集落刺激因子体外扩增脐血单个核细胞 (CBMC) ,研究集落刺激因子对CBMC增殖活性的影响。方法 :用RPMI1 640培养液加入集落刺激因子IL - 3、SCF、GM -CSF及其组合 ,体外扩增CBMC ,健康成人外周血单个核细胞 (PBMC)作为对照组。结果 :加入不同集落刺激因子体外培养CBMC与PBMC后 ,增殖活性均有不同程度的升高 ,以加入IL - 3、SCF、GM -CSF组最为显著 ;CBMC的增殖活性与PBMC比较有显著性差异 (P<0 .0 5)。结论 :集落刺激因子可在体外扩增CBMC ,IL - 3、SCF、GM -CSF之间有明显的协同作用 ;与PBMC相比 ,CBMC有更高的增殖潜能     

人脐血造血祖细胞与脐血浆依赖性的研究

人脐带血与骨髓、外周血干祖细胞生物学特性虽基本相同,但同时也存在一些不同的特性。通过造血祖细胞体外半固体培养发现3种不同来源的粒系祖细胞(CFU—GM)体外生长所需条件不同。骨髓和外周血CFU—GM培养需要外源细胞生长因子GM—CSF存在。脐血CFU—GM培养仅需要脐血浆单独存在即可获得较高的集落产率。揭示了脐血浆中存在一种脐血祖细胞依赖的成分。它不同于GM—CSF,也可能不是GM—CSF协同因子,尚待进一步探讨。此外,提出了一个脐血粒系祖细胞体外培养简便易行的培养体系。     

脐血造血细胞培养的特性

目的　培养脐血中具有造血潜能的造血细胞 ,分析脐血中造血细胞的特性。方法　用密封的采血袋采集脐血 ,采用羟乙基淀粉一次沉淀法分离有核细胞 ,用半固体培养体系培养 ,7天计数红系集落形成单位 (CFU E) ,14天后计数红系爆式集落形成单位 (BFU E)、粒单系集落形成单位 (CFU GM) ,同时染色分析集落的组成成分。结果　采集 34份脐血 ,平均体积为 (99± 2 2 )ml;有核细胞数为 (0 6 4～ 2 5 9)×10 9,有核细胞回收率为 79 2 %± 13 7% ,回收的有核细胞绝对值为 (1 2 2± 0 43)× 10 9;平均每份脐血中含有BFU E(1 39± 0 75 )× 10 6,CFU GM (2 15± 1 2 2 )× 10 6。结论　脐血富含各期具有造血潜能细胞 ,每份脐血在有核细胞数和各种集落总数都可以满足成人移植的需求。     

系统性红斑狼疮血清对树突状细胞诱导作用的时间相关性

目的：研究系统性红斑狼疮(systemic lupus erythematosus，SLF)血清诱导正常单核细胞(Monoeyte，Mo)向树突状细胞(Dendritic cells，DC)分化的时间相关性。方法：分离正常人单核细胞，分别以GM—CSF／IL-4系统和正常人血清(Normal serum)系统以及SLE患者血清(SLE serum)系统诱导培养，在培养的第3、5和第7天收集细胞。流式细胞术检测HLA—DR和CD80，混合淋巴细胞反应检测其功能。结果：诱导培养的第3天SLE血清组可见大量细胞集落，电镜下观察呈典型树突状形态；GM—CSF／IL-4组第4天亦可见大量集落；正常血清组始终无集落形成。HIA—DR在GM—CSF／IL-4系统中始终高表达，CD80随LPS的刺激而升高。正常血清中HLA—DR和CD80始终低表达。SLE患者血清中HLA—DR中等程度表达，CD80在第5天升高达中等程度表达并维持至第7天。MLR显示SLE患者血清组的SI在第5天升高，然而第7天明显下降。结论：SLE血清可以诱导正常单核细胞分化为DC，其功能状态与培养时间呈一定的相关性。     

骨髓增生异常综合征及慢性原因不明性粒细胞减少症患者骨髓CFU—GM和CFU—F的初步观察

利用人类骨髓粒一单核系祖细胞集落(CFU—GM)和成纤维细胞集落(CFU—F)体外检测技术,比较观察32例骨髓增生异常综合征(MDS)和11例慢性原因不明性粒细胞减少症(CIN)患者的造血改变。结果表明,MDS 和 CIN 的造血状态存在显著区别,69%的 MDS 患者 CFU—GM集落显著受抑,集簇、簇/落比值明显升高;其 CFU—F 集落亦存在明显缺陷。而 CIN 患者的上述指标均类似于正常。这提示体外集落检测技术有助于 MDS 和 CIN 的鉴别。此外,CFU—GM 系列培养对 MDS 患者具有一定预后价直。     

一种便于超微形态研究的CFU-GM培养方法

本文介绍高马血清含量的液体法培养C_(57)BL/6J小鼠DFU—GM及其电镜标本制作方法。本法培养的CFU—GM产率与半固体琼脂法无显著性差异,用本法培养在电镜标本制作时有实验操作简便,节省试剂和时间,成功率高,细胞表面结构清晰等优点.     

小鼠胸腺上皮细胞株MTEC_1细胞自发分泌CSF样生物活性因子

用~3H-TdR参入法及半固体琼脂培养法,检测出本室自建小鼠胸腺基质细胞林中的M TEC_1能自发分泌集落刺激因子(CSF)样生物活性因子。用抗IL-6单抗不能封闭MTEC_1-SN的支持骨髓细胞增殖的作用。根据细胞形态学分析,MTEC_1-SN主要促进CFU-GMM和CFU-GM形成。表明MTEC_1细胞除能自发分泌IL-1及IL-6外,尚能自发分泌CSF样活性因子,其主要成份可能为GM-CSF。     

rhIL－3对人骨髓粒单祖细胞集落的影响

应用骨髓细胞体外培养技术，观察了国产重组人白细胞介素３（ｒｈＩＬ－３）对人骨髓粒单祖细胞集落的影响。结果显示，ｒｈＩＬ－３能刺激正常骨髓细胞形成由粒细胞或（和）单核细胞构成的细胞集落，这种效应在一定范围内与ｒｈＩＬ－３剂量呈依赖关系。     

不同emm基因型化脓性链球菌的菌落形态

为探究不同emm基因型的化脓性链球菌的特异性菌落形态,对2019年1—12月从猩红热儿科患者中分离的179株化脓性链球菌进行emm基因测序与分型,观察不同emm基因型的菌落形态.结果表明4种emm基因型(emm12,emm1,emm3和emm4)的菌落特点明显不同,emm12型及亚型菌落为光滑型或粗糙型,直径较小,约0...     

Effects of Zaizhang-I,a traditional chinese medicine,on immunologically mediated aplastic anemia in mice

Summary Immunologically mediated aplastic anemia in mice were used as animal models to study the the curative effect of Zaizhang-I in term of the changes of two pathogenetic aspects in aplastic mice, namely the defciency of hematopoietic stem cells and the disturbance of immunology. Our results demonstrated that in aplastic mice, after treatment by Zaizhang-I, the loss of mature hematopoietice cells (WBC, RBC, Plt) were reduced, and marrow cellular cytosis, and their clinical findings were improved, indicating a partial remission. The present data show that its curative mechanism lies in the action of promoting the recovery of colony forming unit-spleen (CFU-S) and reversing immunologically-induced plasma colony forming unit granulocyte/macrophage (CFU-GM) inhibitory activity. Natural killer cells activity (Nka) and interleukin-2 tumor necrosis factors (TNF) were also examined to further understand the mechanism by which Zaizhang-I reverse plasma hematopoietic activity.     

Inducing effects of macrophage stimulating protein on the expansion of early hematopoietic progenitor cells in liquid culture

Background Macrophage stimulating protein （MSP） is produced by human bone marrow endothelial cells. In this study we sought to observe its effects on inducing the expansion of early hematopoietic progenitor cells which were cultured in a liquid culture system in the presence of the combination of stem cell factor （SCF）, interleukin 3 （IL-3）, interleukin 6 （IL-6）, granulocyte macrophage-colony stimulating factor （GM-CSF）, erythropoietin （EPO） （Cys） and MSP or of Cys and bone marrow endothelial cell conditioned medium （EC-CM）. Methods Human bone marrow CD34^＋ cells were separated and cultured in a liquid culture system for 6 days. Granulocyte-macrophage colony forming unit （CFU-GM） and colony forming unit-granulocyte, erythrocyte, macrophage, megakaryocyte （CFU-GEMM） were employed to assay the effects of different treatment on the proliferation of hematopoeitic stem/progenitor cells. The nitroblue tetrazolium （NBT） reductive test and hoechest 33258 staining were employed to reflect the differentiation and apoptosis of the cells respectively. Results MSP inhibited the proliferation of CFU-GM and CFU-GEMM in semi-solid culture and the inhibitory effect on CFU-GEMM was stronger than on CFU-GM. MSP inhibited the differentiation of early hematopoietic progenitor cells induced by hematopoietic stimulators. Bone marrow （BM） CFU-GEMM was 2.3-fold or 1.7-fold increase or significantly decreased in either Cys＋EC-CM, Cys＋MSP or Cys compared with 0 hour control in liquid culture system after 6 days. Conclusion MSP, a hematopoietic inhibitor, inhibits the differentiation of early hematopoietic progenitor cells induced by hematopoietic stimulators and makes the early hematopoietic progenitor cells expand in a liquid culture system.     

The effects of total saponins of panax ginseng on hematopoietic progenitor cells in healthy humans and aplastic anemia patients

Ginseng is said to have beneficial effects on anemia. The proliferation effects of total saponins of Panax ginseng (TSPG) on hematopoietic progenitor cell in healthy individuals and 29 patients with aplastic anemia (AA) were observed through bone marrow cultures of burst forming unit-erythroid (BFU-E), colony forming unit-erythroid (CFU-E) and colony forming unit-granulocyte/macrophage (CFU-GM) in vitro compared with methyltestosterone (MT). The results suggest TSPG might prompt the proliferation of normal progenitor cells at a concentration of 20 μg/ml. The numbers of BFU-E,CFU-E and CFU-GM increased by 37.8±2.9%, 31.4±2.9% and 33.3±4.0% respectively overthe controls; furthermore TSPG was still useful to BFU-E, CFU-E growth without Epo in vitro, although the colony numbers were much lower. Otherwise MT was useless to CFU-GM. Of the 29 patients with AA, 14 who responded to MT showed sensitivity to TSPG in marrow culture (the rising rate of colony formation exceeded 30%), but immune-mediated AA (patient’s peripheral blood mononucleated cell suppressed normal hematopoiesis) and stem cell decreased AA (few of colonies were formed) showed almost no expression for TSPG activity because of the immunological suppression system and the absence of progenitors.     

录芝复方剂对K562白血病细胞增殖,分化的影响

用细胞培养、细胞形态学及联苯胺染色法观察中药灵芝复方对Ｋ５６２白血病细胞的增殖抑制及分化诱导作用。结果显示：灵芝复方在一定浓度范围内对正常人骨髓ＣＦＵ－ＭＧ生长有促进作用（Ｐ〈０．０５）,而对白血病细胞系Ｋ５６２细胞才殖表现出剂量和时间依赖性抑制（Ｐ〈０．０５）;在诱导分化剂量下,灵芝复方可促进Ｋ５６２细胞向红系分化。可见,灵芝复方有望成为一种抗白血病中药。     

卵黄囊干细胞向粒-单系造血祖细胞的定向诱导分化

目的：观察卵黄囊干细胞向粒-单系造血祖细胞（CFU-GM）的定向诱导分化,稳定和优化检测卵黄囊CFU-GM的方法。方法：应用体外琼脂培养法,观察多种因素对小鼠卵黄囊干细胞形成粒-单系造血祖细胞集落形成单位的影响;应用染色压片法对所生成的集落性质作鉴定。结果：植入不同数量的E7.5~8.5 d的卵黄囊干细胞与CFU-GM生成数量之间呈高度正相关;在接种相同数量的卵黄囊细胞数的情况下,DMEM培养体系生成的CFU-GM数明显多于IMDM培养体系生成的集落数（P<0.01）;马血清（HS）组优于胎牛血清（FBS）组（P<0.01）;与GM-CSF相比,WEHI-3条件培养液（W3-CM）能明显促进卵黄囊CFU-GM的生成（P<0.01）。采用完整琼脂凝块压片法对卵黄囊细胞所形成的集落进行鉴定表明为粒-单系细胞集落。结论：卵黄囊干细胞具有向CFU-GM分化的能力;卵黄囊干细胞CFU-GM诱导体系中各组分变化均可影响CFU-GM的集落生成率;以DMEM,GM-CSF或W3-CM,HS为组分的体系可稳定地检测卵黄囊细胞CFU-GM的集落生成率。     

Bovine granulocyte/macrophage and erythroid colony culture: characteristics of the colonies and the assay systems.

Bovine bone marrow granulocyte/macrophage colonies were cultured in vitro in methyl cellulose and in plasma clots using bovine endotoxin-stimulated serum as a source of colony stimulating activity. The endotoxin-stimulated serum was four times as potent as the control serum in the methyl cellulose cultures. No significant increase in the number of colony forming units was observed when bovine marrow cells were maintained in suspension cultures for various periods prior to plating in methyl cellulose. The percentage of glass/plastic adherent cells in bovine marrow cells was observed to be 43% +/- 12 (SD). Benzidine positive erythroid colonies appeared in plasma clot cultures on day 4 and disappeared by day 9. No second population of erythroid colonies appeared either as a function of time or as a function of erythropoietin concentration. The optimum erythropoietin concentration for bovine erythroid cultures was found to be 1.0 unit/mL. A significant difference was observed between animals in their marrow capacity to produce erythroid colonies in culture but no significant difference was observed within individual animals over a period of three months.