长期骨髓培养、白细胞介素2、干扰素α2a体外净化 慢性粒细胞白血病骨髓的研究

Bone marrow cells from 10 patients with chronic myeloid leukemia (CML) were purged with different combination of long-term bone marrow culture (LTBMC), interleukin-2(IL-2,1 000 U/ml) and interferon-α_2a(IFN-α_2a,1 000 U/ml) for two weeks in vitro. It was found that ①The purging effect of single LTBMC was poor; ②Significant killing effects on CFU-GM of CML and ph'(+) cells were found after addition of IL-2 in LTBMC (P＜0.01, P＜0.05). IL-2 could not affect the CFU-GM of normal control; ③IFN-α_2a could inhibit the growth of ph'(+) cells without affecting CFU-GM of CML and normal in LTBMC system. ④ LTBMC, IL-2 and IFN-α_2a might exert a synergetically purging effect on ph'(+) CML cells. These results suggest that purging bone marrow with combination of LTBMC, IL-2 and IFN-α_2a might have good purging effect, and could be used for purging CML marrow in clinical practice.     

神经生长因子对正常和放化疗复合损伤小鼠粒-巨噬系血发生的影响

目的 探讨神经生长因子(NGF)对小鼠粒-巨噬系血细胞发生的影响.方法 采用流式细胞术、祖细胞集落分析、血细胞计数、实时荧光定量PCR及酶联免疫吸附分析法(ELISA),检测注射NGF对正常和经60Coγ射线照射 腹腔注射环磷酰胺(放化疗复合损伤)小鼠骨髓细胞(BMC)增殖周期、粒-巨噬系祖细胞集落(CFU-GM)产率、外周白细胞总数、骨髓细胞粒-巨噬系集落刺激因子(GM-CSF)mRNA的表达及血清中GM-CSF和IL-3浓度的影响.并观察在体外培养体系中加入不同浓度的NGF时CFU-GM集落产率的变化及与GM-CSF的关系.结果 在体外CFU-GM培养中,加入重组小鼠GM-CSF (rmGM-CSF)时,NGF剂量依赖性地提高集落产率.注射NGF[7.5 μg/(kg·d)或10 μg/(kg·d)]持续7 d,正常和放化疗复合损伤小鼠外周血白细胞总数、小鼠骨髓细胞中S G2/M期细胞比例、CFU-GM集落产率显著高于注射生理盐水的对照组;放化疗复合伤小鼠血清中的GM-CSF和IL-3也显著升高.结论 NGF可与体外培养体系中的造血刺激因子协同作用,促进正常和放化疗复合损伤小鼠CFU-GM的形成.NGF在体内可促进正常和放化复合损伤小鼠骨髓细胞进入有丝分裂,促进造血干细胞向粒-巨噬系方向分化,促进CFU-GM的形成,提高外周血白细胞数;NGF还可刺激放化疗复合损伤小鼠体内GM-CSF和IL-3的分泌,这可能是NGF促进放化疗复合损伤后粒-巨噬系造血恢复的途径之一.     

骨髓增生异常综合征患者CFU-GM和CFU-L的测定

观察分析了18例骨髓增生异常综合征(MDS)的粒-单系祖细胞(CFU-GM)。其中4例同时作了CFU-GM及白血病祖细胞(CFU-L)动态观察,发现2例转变成急性白血病前,CFU-GM生长缺陷或丛样生长,并见CFU-L形成。另2例CFU-GM形成减少或生长缺陷。无CFU-L生长,临床病情相对稳定。结果表明骨髓CFU-GM丛样生长和CFU-L形成的MDS病人可能较快的发展成急性白血病。     

商陆素－脾细胞条件培养基对小鼠骨髓造血祖细胞作用的研究

目的研究商陆素-脾细胞条件培养基(PWM-SCM)对小白鼠骨髓造血祖细胞的作用.方法用micro-ELISA方法测定PWM-SCM中IL-2、IL-3、IL-4和IL-6的含量,在CFU-GM和CFU-E培养体系中加入PWM-SCM,观察其对造血祖细胞的作用.结果PWM-SCM中4种细胞因子的含量IL-2为72.5±1.1 pg/ml,IL-3为433.3±11.6 pg/ml,IL-4为28.9±0.4pg/ml,IL-6为143.3pg/ml,其测定值均高于对照组RPMI-1640完全培养基中测定的含量(P＜0.05～0.01).骨髓造血祖细胞培养显示,PWM-SCM对CFU-GM无影响,但CFU-E的集落数由6.2±1.4增加到34.0±2.5,有非常显著性差异(P＜0.001).结论PWM-SCM中含有多种细胞因子,对小白鼠骨髓造血祖细胞有集落刺激活性,对CFU-E的形成有协同促进作用.     

脐血单个核细胞的搅拌悬浮培养

研究了悬浮培养中接种密度、换液和优化培养中所用细胞因子组合对造血细胞扩增的影响。结果表明,较高的接种密度(1.0×106cells/mL)比低接种密度(0.5×106cells/mL)更有利于总细胞、粒巨噬集落形成单位(CFU-GM)和巨核细胞集落形成单位(CFU-Mk)的扩增。换液能及时补充葡萄糖和移出培养中产生的乳酸,从而不对细胞生长造成影响,而且可以成功地控制pH不超出造血细胞正常生长所需pH范围。在SCF、IL-3和IL-6组合基础上添加Flt-3配体(FL)和促血小板生成素(TPO)能比原来的SCF、IL-3和IL-6组合更能促进总细胞、CFU-GM和CFU-Mk的扩增。     

rhTNF—α联合IL—2对急性髓细胞白血病患者骨髓体外净化的研究

目的 探讨重组人肿瘤坏死因子α（rhTNF-α）联合白细胞介素2（IL-2）对急性髓细胞白血病（AML）骨髓体外净化的作用。方法 rhTNF-α(1000u/ml)和IL-2（500u/ml)联合，对17例AML患者骨髓体外净化培养1-3d，用甲基纤维素半固体培养法测定粒-巨噬细胞集落（CFU-GM）、白血病祖细胞（CFU-L）形成，并以免疫组化法测定CD33、CD38和CD34阳性表达率的变化。结果 （1）rhTNF-α对8例正常人和17例患者的CFU-GM均有明显的抑制作用。而与IL-2联合作用对CFU-GM则无明显影响；（2）单用rhTNF-α或IL-2与患者骨髓共同孵育1d和3d，CFU-L形成率均有所下降，但至孵育3d后，尚残余20%、6%的白血病克隆，不能完全根除CFU-L，而两者联合作用3d后，CFU-L抑制率达100%；（3）17例AML患者骨髓经rhTNF-α、IL-2净化培养3d后，白敌国病细胞CD33、左右8帮CD34阳性表达率发生了明显变化。结论 （1）单用rhTNF-α或IL-2净化效果不理想；（2）rhTNF-α联合IL-2对CD34阳性表达率发生了明显的变化。结论 （1）单用rhTNF-α或IL-2净化效果不理想；（2）rhTNF-α联合IL-2对CFU-L有选择性杀伤作用。而对正常CFU-GM无明显影响。净化效果较好；（3）白血病细胞CD33、CD38、CD34阳性率的变化可间接评价AML骰须净化效果。     

重组人白细胞介素-1β对人红系、粒系造血祖细胞集落形成的影响

为探讨重组人白细胞介素-1β(rhIL-1β)对人红系、粒系造血祖细胞的作用,采用96孔板微量培养法在体外进行培养。在培养中加入不同浓度的rhIL-β1(0～5ug/mL)后,观察BFU-E、CFU-E及CFU-GM的集落形成。结果加入不同浓度的IL-1β后,BFU-E、CFU-E的集落形成均受到抑制,且呈剂量依赖性,在IL-1β剂量为0.1和0.5μg/mL时,抑制作用更明显(JP<0.005,0.05),而IL-1β对CFU-GM的集落形成无明显影响。结果表明,IL-1β对红系造血祖细胞(BFU-E和CFU-E)影响的研究有助于解释某些慢性疾病性贫血(如类风湿性关节炎伴贫血等)的发生机制,提示IL-1β单克隆抗体有可能用于治疗慢性疾病性贫血。     

Double potentialities of tumoricide and hematopoiesis of human bone marrow cells activated by IL-2 and IL-3

The biomodulative and hematopoietic potentialities of IL-2 and IL-3 activatedbone marrow(ABM)cells from patients with lung adenocarcinoma were studied in vitro.Human bone marrow(BM)cells could be activated by IL-2 in culture for 7d.TheseIL-2 ABM cells had higher cytolytic activities against cells of H 7402 cell line and freshautologous adenocarcinoma cells and maintained the cytotoxicities longer than IL-2 acti-vated peripheral blood lymphocytes(APBLs),a point of possible importance in adoptiveimmunotherapy for cancer patients.The IL-2 ABM cells also had similar number ofBFU-E and CFU-GM to that had fresh BM cells if 1L-3 was added 48h alter IL-2 inculture.The IL-2 and IL-3 ABM cells might be used to eliminate tumor cells and tosupply reconstitutive elements of BM for autologous bone marrow transplantation.     

IL-2与IFN-α联合激活的白血病缓解期骨髓对白血病细胞的净化作用

目的：体外研究白细胞介素Ⅱ(IL-2)和α-干扰素(IFN-α)联合激活对白血病缓解期骨髓自然杀伤细胞(NK)和淋巴因子激活的杀伤细胞(LAK)活性的影响，以及对白血病细胞(K562细胞)的净化作用，并观察其对正常造血的影响。方法：标准4h^51Cr释放实验测定激活的白血病缓解期骨髓的细胞毒作用；集落培养法和逆转录多聚酶链反应检测激活的白血病缓解期骨髓对K562细胞的净化作用。结果：IL-2和INF-α单用虽均能增强白血病缓解期骨髓的NK活性和诱导LAK细胞的产生，但两者联合激活的白血病缓解期骨髓的NK和LAK活性，明显优于IL-2和IFN-α的单用(P＜0．05)。在体外净化实验中两种细胞因子均能激活白血病缓解期骨髓细胞对K562细胞的净化作用，但两种联合作用最强，且bcr／abl融合基因检测为两者联合组33．33％(4／12)，Rt-pcR法，而IL-2作用次之为66．67％(8／12)，最后是IFN-α为91．67％(11／12)。两种细胞因子中以IFN-α单用对CFU-GM的抑制有一定影响(P＜0．01)，而IL-2和两者联合对激活骨髓的CFU-GM无明显影响。结论：IL-2能激活白血病缓解期骨髓的NK细胞的活性和诱导LAK细胞的产生，IFN-α能增强IL-2激活白血病缓解期骨髓对白血病细胞的净化作用。     

三氧化二砷对小鼠骨髓造血微环境的影响

目的：了解三氧化二砷（As₂O₃）对正常小鼠骨髓基质细胞的影响。方法：采用体外小鼠骨髓基质细胞贴壁培养法、粒-单系祖细胞集落培养法和ELISA方法,观察不同浓度As₂O₃作用不同时间后CFU-F、骨髓基质细胞支持的CFU-GM及其分泌G-CSF、IL-11的数量变化。 结果：7 μmol·L^-1的As₂O₃使CFU-F、骨髓基质细胞支持的CFU-GM产率及其 分泌的G-CSF、IL-11的水平较对照组显著下降 (P<005)。3 μmol·L^-1的As₂O₃用药3 d或5 d骨髓基质细胞分泌G-CSF、IL-11的水平较对照组显著增加(P<0.05),持续用药7 d后,则无显著增加。结论：较低浓度As₂O₃对骨髓基质细胞集落形成及其支持CFU-GM生成无明显抑制作用,反而刺激骨髓基质细胞分泌G-CSF和IL-11,引起分泌高峰的As2O3浓度是3 μmol·L^-1,高峰时间为用药5 d,As₂O₃给药浓度过大、用药时间过长,均可使造血因子分泌量下降。      

集落刺激因子促进豚鼠体内造血的研究

给11只Harty豚鼠腹腔内注射胎盘条件培养液(HPCM)0.5ml/d,共10天,周围血白细胞总数明显升高,以中性粒细胞升高为主.6只BALB/C小鼠腹腔内注射HPCMOo.3ml/d,共7天,粒-巨噬祖细胞(granulocy-macrophage colng-formung unit,CFU-GM)产率明显升高,是对照组给的2.l倍.结果提示,胎盘条件培养液来源的集落刺激因子,在体内能促进CFU-GM增殖,担升周围血白细胞和中性粒细胞.     

细胞因子及4℃保存对脐血造血干／祖细胞的影响

应用体外半固体培养方法,研究了粒巨噬细胞集落刺激因子（ＧＭ－ＣＳＦ）、白细胞介素３（ＩＬ－３）、白细胞介素６（ＩＬ－６）和促红细胞生成素（Ｅｐｏ）的不同组合及４℃保存对脐血造血干／祖细胞ＣＦＵ－ＧＭ和ＨＰＰ－ＣＦＣ产率的影响。结果表明：在琼脂半固体培养体系中,在不同组合的细胞因子作用下,脐血ＣＦＵ－ＧＭ产率有是明显差异;以ＧＭ－ＣＳＦ组最低、ＧＭ－ＣＳＦ＋ＩＬ－３＋ＩＬ－６＋Ｅｐｏ组最高。脐血置４     

The murine submandibular gland conditioned medium induce the development of CFU-GM and CFU-meg]

OBJECTIVE: Our purpose is to determine whether murine submandibular gland produce hematopoietic growth factors or not and which hematopoietic growth factor are produced by murine submandibular gland. METHODS: By using the techniques of culture of hematopoietic progenitor cells(CFU-GM, CFU-Meg) ex vivo, flow-cytometry, the effects of murine submandibular gland conditioned medium(SGCM) on the development of CFU-GM and CFU-Meg in mice was studied. RESULTS: SGCM can stimulate the development of CFU-GM and CFU-Meg (without any exogeneous HGF), almost no colony in control (without any exogeneous HGF and SGCM); the promoting activity of male SGCM is higher than female SGCM's in augmenting colony formation of CFU-Meg (P < 0.05), there is no difference of CFU-GM(P > 0.05). The stimulating activity of anemic mice SGCM is higher normal mice SGCM's (P < 0.05). IL-3 can collaborate with female SGCM to stimulate proliferation of CFU-Meg. SGCM can promote bone morrow cell entiring the active proliferative phase(S/G2). CONCLUSION: Submandibular gland can stimulate the development of CFU-GM and CFU-Meg by secreting hematopoietic growth factor-like activities. Our study provide the experimental evidences for clarifying the relationship between submandibular gland and hematopoiesis.     

Effect of Angiotensin Ⅱ on Cord Blood CD34+ Cells Expansion in vitro

In order to investigate the influence of angiotensin Ⅱ on hematopoietic system, CD34+cells in cord blood were purified, and the effects of angiotensin Ⅱ in combination with various cytokines on their growth and differentiation were studied by cell culture in vitro. It was found that angiotensin Ⅱ in suspending medium could stimulate both BFU-E and CFU-GM expansion. The number of BFU-E and CFU-GM was increased with the increases of angiotensin Ⅱ concentrations during a certain range. In addition, the expansion fold of CFU-GM was increased from 2.3±0.8 times to 7.8±2.3 times when angiotensin Ⅱ was added in the presence of SCF+G-CSF+GM-CSF+IL-3 cytokines mixture. Similarly, the expansion fold of BFU-E was increased from 3.1 ±1.8 times to 9.2±2.3 times with angiotensin Ⅱ in the presence of SCF+EPO+TPO+IL-3. In the semi-solid medium, angiotensin Ⅱ could stimulate CFU-GM expansion but had no effect on the growth of BFU-E. In conclusion, angiotensin Ⅱ had some stimulating effects on cord blood hematopoietic progenitors expansion in vitro in the presence of other cytokines.     

用小鼠骨髓内皮细胞条件培养液代替造血刺激因子培养CFU— …

利用大于１０ｋＤ组分的小鼠骨髓内此细胞条件培养液（ｍＢＭＥＣ－ＣＭ）作刺激物体外琼脂培养ＣＦＵ－ＧＭ,与ｍＧＭ－ＣＳＦ合用培养ＨＰＰ－ＣＦＣ获得成功。就培养ＣＦＵ－ＧＭ和ＨＰＰ－ＣＦＣ而言,用细胞因子作刺激物与并用大于１０ｋＤ组分的ｍＢＭＥＣ－ＣＭ作刺激物相比较,以后者的ＣＦＵ－ＧＭ及ＨＰＰ－ＣＦＣ产率最高。     

Effect of Angiotensin Ⅱ on Cord Blood CD34^＋ Cells Expansion in vitro

Summary In order to investigate the influence of angiotensin II on hematopoietic system, CD34⁺ cells in cord blood were purified, and the effects of angiotensin II in combination with various cytokines on their growth and differentiation were studied by cell culturein vitro. It was found that angiotensin II in suspending medium could stimulate both BFU-E and CFU-GM expansion. The number of BFU-E and CFU-GM was increased with the increases of angiotensin II concentrations during a certain range. In addition, the expansion fold of CFU-GM was increased from 2.3±0.8 times to 7.8±2.3 times when angiotensin II was added in the presence of SCF+G-CSF+GM-CSF+IL-3 cytokines mixture. Similarly, the expansion fold of BFU-E was increased from 3.1±1.8 times to 9.2±2.3 times with angiotensin II in the presence of SCF+EPO+TPO+IL-3. In the semi-solid medium, angiotensin II could stimulate CFU-GM expansion but had no effect on the growth of BFU-E. In conclusion, angiotensin II had some etimulating effects on cord blood hematopoietic progenitors expansionin vitro in the presence of other cytokines. PENG Cheng, female, born in 1978, Resident     

5种造血生长因子对造血祖细胞集落形成的影响

目的探讨IL-3、IL-6、GM-CSF、G2、PIXY321对骨髓造血祖细胞集落形成的影响.方法 5种造血生长因子分别采用100、250、500、750、10 00 u/ml浓度,进行骨髓造血祖细胞集落培养,从中找出峰值浓度,然后在峰值浓度下进行集落培养,计数不同造血生长因子条件下所形成的集落.结果 IL-3、IL-6、GM-CSF、G2、PIXY321对造血祖细胞集落形成的峰值浓度分别为100、100、250、750、25 0 u/ml.峰值浓度下,对CFU-E、BFU-Em、BFU-Eim、CFU-GM形成的作用强度不同,PIXY321 条件下所形成的集落数最多.结论这五种造血生长因子对骨髓造血祖细胞的集落形成均有促进作用,PIXY321效果显著.     

人内皮细胞和4种细胞因子对正常人和再生障碍性贫血患者粒系造血的影响

通过人脐静脉内皮细胞为铺层的双层细胞培养,观察内皮细胞和几种细胞因子对正常人和再障患者粒系造血的影响。方法以人内皮细胞作铺层,作体外骨髓CFU-GM半固体双层培养,并在培养体系中加入细胞因子GM-CSF、IL-2、IL-6和LAK细胞上清,观察内皮细胞和细胞因子对正常人和再障患者粒系造血的影响。结果在有内皮细胞的培养体系中CFU-GM的产率均显著高于无内皮细胞的相应培养体系。在无内皮细胞时,IL-6和LAK上清显示出与GM-CSF相似的粒系造血刺激作用。对15例初诊慢性再障患者骨髓粒系祖细胞培养结果表明,无内皮细胞存在时,无论向培养体系中加入何种细胞因子,均无集落生成,而在有内皮细胞的双层培养中,部分患者骨髓可见CFU-GM集落生成。结论内皮细胞对正常和再障粒系造血均有明显影响,并提示再障造血障碍有微环境因素。