胚胎干细胞C3B鼠视网膜下腔移植分化研究

目的：探讨胚胎干细胞在具有正常视网膜结构的C3B鼠视网膜下腔中的诱导分化情况。 方法:胚胎干细胞传1代后进行拟胚体培养。拟胚体消化成单细胞后联合视黄酸注入C3B鼠视网膜下腔，注射后1周、3周、2月处死小鼠取材进行病理切片、电镜检查和免疫组化检测。 结果:1周时，可见到注射部位视网膜层水肿增厚。3周和2个月时，3只移植眼内出现畸胎瘤，占所有移植眼的25%，其余眼球注射部位仅见瘢痕组织或眼球萎缩。电镜发现增殖的细胞核异型性明显，具肿瘤细胞特征。免疫组化显示：畸胎瘤部分区域MAP-2强阳性反应；可见团状或集落状细胞GFAP强阳性反应；个别细胞Nestin阳性反应。 结论:胚胎干细胞移植入具有正常视网膜结构的C3B鼠视网膜下腔，未能出现ESC向视网膜组织分化或嵌入视网膜组织，相当部分的鼠眼出现了畸胎瘤，其临床安全性和致瘤性是非常值得关注的问题。     

Patch clamped responses from outer hair cells in the intact adult organ of Corti

Outer hair cells (OHCs) from the mammalian cochlea act as both sensory cells and motor cells. We report here whole-cell tight seal recordings of OHC activity in their natural embedding tissue, the intact organ of Corti, using a temporal bone preparation. The mean cell resting potential, –76±4 mV (n=19) and input conductance (10±3 nS at –70 mV) of third turn hair cells were significantly lower than have been found in isolated cells. Two main K⁺ currents in the cell were identified. One current, activated positive to –100 mV, was reduced by 5 mM BaCl₂. The other current, activated above –40 mV, was reduced by 100 M 4-aminopyridine (4-AP) and by 30 mM tetraethylammonium (TEA). Both of these currents have been also identified in recordings reported from isolated cells. On stepping to different membrane potentials, cells imaged in the organ of Corti changed length by an amount large enough to cause visible distortions in neighbouring cells. By quantifying such distortions we estimate that the forces generated by OHCs can account for the enhanced response to sound required by the cochlear amplifier.     

间质干细胞移植在大鼠缺血性脑卒中的实验研究

目的:探索间质干细胞移植在脑梗塞大鼠的脑内分化及促进神经功能的修复作用。方法:从健康人的肋骨骨髓中分离、纯化而获得的间质干细胞,经体外培养、扩增、鉴定的同时制造大脑中动脉皮层梗塞的实验动物模型;并且,在梗塞后10 d移植所鉴定的间质干细胞经免疫组化验证间质干细胞的脑内成活、及神经性分化后,在第2周和第6周进行神经功能评分。结果:间质干细胞在梗塞灶周边向神经元和神经胶质细胞的方向分化;移植的神经功能评分,修复作用与对照组有显著差异。结论:人间质干细胞为脑梗塞治疗提供了新的思路。     

毛细胞PMCA2在小鼠内耳Ca2+调节和听觉平衡中的作用

目的： 研究小鼠内耳毛细胞细胞膜Ca²⁺-ATP酶2型蛋白（PMCA2）在听觉平衡生理中的作用及意义。 方法：利用不同基因型小鼠PMCA2^-/-(突变纯合子)、PMCA2^+/-(杂合子)和PMCA2^+/+(野生型)为实验对象，采用听觉脑干反应(ABR)、畸变产物耳声发射(DPOAE)和耳蜗内电位(EP)检测等方法，分别检测不同基因型小鼠的内耳生理功能。结果：PMCA2^+/+野生型鼠的听力正常，ABR的短声(click)阈值为(13.75±11.08)dB SPL；EP均值为(91.3±11.0)mV。PMCA2^+/-杂合子小鼠听力低于同窝PMCA2^+/+野生型鼠，ABR的短声阈值为(63.89±12.90)dB SPL，与PMCA2^+/+小鼠比较差异显著(P<0.01)；PMCA2^+/-小鼠没有检测出DPOAE的高频区辐值，其EP均值为(80.7±9.0)mV。PMCA2^-/-小鼠的ABR在100 dB SPL无反应，表现出全聋和平衡功能失调，其EP均值为(56.6±13.0)mV；PMCA2^-/-小鼠没有检测出DPOAEs。结论：PMCA2是内耳毛细胞纤毛丛上的重要Ca²⁺转运通道，对维持内耳的Ca²⁺代谢和听觉平衡功能有重要作用。     

Transplantation of neural differentiated human mesenchymal stem cells into the cochlea of an auditory-neuropathy guinea pig model

The aim of this study was to determine the effects of transplanted neural differentiated human mesenchymal stem cells (hMSCs) in a guinea pig model of auditory neuropathy. In this study, hMSCs were pretreated with a neural-induction protocol and transplanted into the scala tympani of the guinea pig cochlea 7 days after ouabain injury. A control model was made by injection of Hanks balanced salt solution alone into the scala tympani of the guinea pig cochlea 7 days after ouabain injury. We established the auditory neuropathy guinea pig model using 1 mM ouabain application to the round window niche. After application of ouabain to the round window niche, degeneration of most spiral ganglion neurons (SGNs) without the loss of hair cells within the organ of Corti and increasing the auditory brain responses (ABR) threshold were found. After transplantation of neural differentiated hMSCs, the number of SGNs was increased, and some of the SGNs expressed immunoreactivity with human nuclear antibody under confocal laser scanning microscopy. ABR results showed mild hearing recovery after transplantation. Based on an auditory neuropathy animal model, these findings suggest that it may be possible to replace degenerated SGNs by grafting stem cells into the scala tympani.     

小型猪外周血内皮祖细胞的体外培养与分化研究

目的：研究小型猪外周血内皮祖细胞（EPC）的体外分离和定向分化、扩增培养方法，为EPC移植应用于临床提供实验依据。 方法： 密度梯度离心法从小型猪200 mL新鲜全血中分离单个核细胞，用含血管内皮生长因子等各种添加剂的内皮细胞系列专用培养液，分别在包被与不包被的培养皿中进行贴壁培养，诱导其向内皮细胞分化，观察经过不同时间培养后的细胞生长情况并进行诱导分化后的生物学鉴定，包括细胞表型鉴定、DiI标记的乙酰化低密度脂蛋白（DiI-acLDL）摄取试验、超微结构鉴定、体外血管生成实验。 结果： 包被了贴壁因子的培养皿细胞贴壁及增殖均多于未包被组。前者第3-4 d可观察到梭形贴壁细胞，10 d后出现多个细胞簇，14 d左右可观察到条索状、网状血管样结构，原代细胞培养21 d左右接近融合并且呈典型的鹅卵石样排列。第7-14 d有大于98%的细胞Flk-1、vWF、CD31表达阳性，CD34+细胞为（26.01±2.82）％，有大于95%的细胞DiI-acLDL摄取试验阳性，透射电镜可见特征性的Weible-Palade小体存在，在血管生成实验中，血管内皮生长因子显著促进EPC形成小管的数量与复杂程度，呈一定的量效关系。 结论： 密度梯度离心法结合贴壁筛选培养法可以用于体外分离外周血中EPC进行实验研究，EPC在一定的诱导培养条件下能分化成为血管内皮细胞，贴壁因子、血管内皮生长因子等对于体外培养EPC有很重要的作用。     

软骨干/祖细胞修复软骨损伤的研究进展

关节软骨损伤是临床常见的运动损伤,然而关节软骨缺乏血管、神经支配,损伤后难以自身完全再生修复,缺乏有效的治疗会导致骨关节炎(OA)的发生。随着组织工程学的发展,近期研究发现,软骨组织中存在具有多向分化潜能的软骨干/祖细胞(CSPC),可以分化成高度同质化的软骨细胞。这种细胞在软骨损伤后自发迁移并参与软骨损伤组织修复和再生,有望成为治疗软骨损伤的新方法。本文对CSPC的分布、特征及其在软骨损伤和OA中的作用和应用进行综述,旨在为CSPC的研究应用及软骨损伤的治疗提供理论基础,为临床上治疗软骨损伤开拓新方向。     

Cotransplantation of cord blood hematopoietic stem cells and culture-expanded and GM-CSF-/SCF-transfected mesenchymal stem cells in SCID mice

Mesenchymal stem cells (MSC) are multipotent in nature and believed to facilitate the engraftment of hematopoietic stem cells (HSC) when transplanted simultaneously in animal studies and even in human trials. In this study, we transfected culture-expanded MSC with granulocyte macrophage-colony stimulating factor (GMCSF) and stem cell factor (SCF) cytokine genes and then cotransplanted with mononuclear cells (MNC) to further promote HSC engraftment. MNC were harvested from cord blood and seeded in long-term culture for ex vivo MSC expansion. A total of 1 x 10(7) MNC plus MSC/microL were introduced to the tail vein of nonobese diabetic/severe combined immunodeficiency mice. After 6-8 weeks later, homing and engraftment of human cells were determined by flow cytometry and fluorescence in situ hybridization studies. The total nucleated cell count and the engraftment of CD45+/CD34+ cells and XX or XY positive human cells were significantly increased in cotransplanted mice and even higher with the cytokine gene-transfected MSC (GM-CSF>SCF, p<0.05) than in transplantation of MNC alone. These results suggest that MSC transfected with hematopoietic growth factor genes are capable of enhancing the hematopoietic engraftment. Delivering genes involved in homing and cell adhesions, CXCR4 or VLA, would further increase the efficiency of stem cell transplantation in the future.     

Transplantation of bone marrow-derived mesenchymal stem cells into the developing mouse eye

Mesenchymal stem cells (MSCs) have been studied widely for their potential to differentiate into various lineage cells including neural cells in vitro and in vivo. To investigate the influence of the developing host environment on the integration and morphological and molecular differentiation of MSCs, human bone marrow-derived mesenchymal stem cells (BM-MSCs) were transplanted into the developing mouse retina. Enhanced green fluorescent protein (GFP)-expressing BM-MSCs were transplanted by intraocular injections into mice, ranging in ages from 1 day postnatal (PN) to 10 days PN. The survival dates ranged from 7 days post-transplantation (DPT) to 28DPT, at which time an immunohistochemical analysis was performed on the eyes. The transplanted BM-MSCs survived and showed morphological differentiation into neural cells and some processes within the host retina. Some transplanted cells expressed microtubule associated protein 2 (MAP2ab, marker for mature neural cells) or glial fibrillary acid protein (GFAP, marker for glial cells) at 5PN 7DPT. In addition, some transplanted cells integrated into the developing retina. The morphological and molecular differentiation and integration within the 5PN 7DPT eye was greater than those of other-aged host eye. The present findings suggest that the age of the host environment can strongly influence the differentiation and integration of BM-MSCs.     

Postnatal epithelium and mesenchyme stem/progenitor cells in bioengineered amelogenesis and dentinogenesis

Rodent incisors provide a classic model for studying epithelial–mesenchymal interactions in development. However, postnatal stem/progenitor cells in rodent incisors have not been exploited for tooth regeneration. Here, we characterized postnatal rat incisor epithelium and mesenchyme stem/progenitor cells and found that they formed enamel- and dentin-like tissues in vivo. Epithelium and mesenchyme cells were harvested separately from the apical region of postnatal 4–5 day rat incisors. Epithelial and mesenchymal phenotypes were confirmed by immunocytochemistry, CFU assay and/or multi-lineage differentiation. CK14+, Sox2+ and Lgr5+ epithelium stem cells from the cervical loop enhanced amelogenin and ameloblastin expression upon BMP4 or FGF3 stimulation, signifying their differentiation towards ameloblast-like cells, whereas mesenchyme stem/progenitor cells upon BMP4, BMP7 and Wnt3a treatment robustly expressed Dspp, a hallmark of odontoblastic differentiation. We then control-released microencapsulated BMP4, BMP7 and Wnt3a in transplants of epithelium and mesenchyme stem/progenitor cells in the renal capsule of athymic mice in vivo. Enamel and dentin-like tissues were generated in two integrated layers with specific expression of amelogenin and ameloblastin in the newly formed, de novo enamel-like tissue, and DSP in dentin-like tissue. These findings suggest that postnatal epithelium and mesenchyme stem/progenitor cells can be primed towards bioengineered tooth regeneration.     

同种异体移植骨髓间质干细胞治疗大鼠心梗后心室重构

目的： 观察骨髓间质干细胞（MSCs）移植对大鼠心梗后心室重构和心功能的影响，比较成年大鼠MSCs与乳鼠MSCs移植疗效，初步探讨同种异体移植的可行性。方法: 分别取大鼠和乳鼠的骨髓，体外分离、扩增培养MSCs，Brdu标记。在结扎冠脉后1-2 h 分别将大鼠MSCs和乳鼠MSCs分点注射到异体大鼠心脏梗死边缘区，6周后，采用超声心动图和解剖直测法获得大鼠心功能、心室重构和病理学资料。结果: 细胞移植组左室舒张末期内径和收缩末期内径短于、室壁厚于对照组，重量指数和心室腔都明显小于对照组。组织病理表现细胞移植组心梗区心肌数目多于、血管密度大于对照组，细胞外基质胶原的形成和血管周围胶原沉积均明显少于对照组，心梗区可见Brdu阳性细胞。但大鼠MSCs移植组和乳鼠MSCs移植组间无明显差异。结论: 同种异体骨髓间质干细胞可以在心梗区定植，减少胶原形成，促进心肌和血管生成，从而延缓心梗后心室重构，提高左室收缩和舒张功能。成年鼠干细胞移植与乳鼠干细胞移植具有相似的效果。     

人胚胎成纤维细胞对人胚胎干细胞生长的作用

目的：比较人和小鼠胚胎成纤维细胞对人胚胎干细胞生长的作用,为胚胎干细胞定向诱导各系统细胞应用于临床,消除异种蛋白污染打下基础。方法：分别采用人胚胎成纤维细胞和小鼠胚胎成纤维细胞为饲养层细胞,支持人受精卵的培养,观察其增殖和分化情况。结果：人和小鼠胚胎成纤维细胞分别加入白血病抑制因子（hLIF）均能很好支持人胚胎干细胞生长增殖,并保持未分化状态。结论：完全可以使用人胚胎成纤维细胞支持人胚胎干细胞增殖,消除异种蛋白污染的可能性,为胚胎干细胞定向诱导分化发育应用于临床打下坚实基础。     

胚胎来源肝干细胞肝内移植后在小鼠体内的分布及分化

BACKGROUND:As many factors can lead to liver injury, we attempt to use the “therapeutic liver regeneration” technology in clinical treatment of liver diseases by promoting liver regeneration. OBJECTIVE:To investigate distribution and differentiation of embryonic liver stem cells in mice after intrahepatic transplantation via a transplantation approach. METHODS:Liver injury models were prepared in 20 BALB/c mice, and then randomly equivalently assigned into two groups: 70% partial hepatectomy with intrahepatic transplantation with 1×10⁵ embryonic liver stem cells in control group; therapeutic liver regeneration model plus intrahepatic transplantation with 1x10⁵ embryonic liver stem cells in observation group. At 1 and 2 weeks after cell transplantation, the liver parenchyma of mice was observed. And at 2 weeks, both of the two groups underwent confocal immunofluorescence assay. Besides, blood samples of mouse tail vein were collected to detect levels of serum albumin. RESULTS AND CONCLUSION:At 1 week after cell transplantation, in the liver parenchyma, green fluorescence was sparsely distributed in the two groups, and the distribution density had no significant difference between the two groups; at 2 weeks after cell transplantation, hepatic cord-like structures appeared in the liver parenchyma of two groups, and the green fluorescence distribution in the control group was limited, but significantly expanded in the observation group. At 2 weeks after cell transplantation, positive albumin expression in the liver parenchyma was significantly higher in the observation group than in the control group, and there was no significant difference in levels of serum albumin between two groups (P > 0.05). To conclude, after transplantation of embryonic liver stem cells in the therapeutic liver regeneration model mice hepatocytes can be effectively integrated into the host hepatic plate, differentiate in the liver, and partially trigger the function of hepatocytes.     

人骨髓源干细胞向胰岛素分泌细胞分化(英文)

目的：探讨人骨髓源干细胞向具有功能的胰岛素分泌细胞分化的可能性。方法：从人骨髓分离间充质干细胞。采用表皮生长因子、β-巯基乙醇和高糖培养基诱导其向胰岛素分泌细胞分化。经诱导后,用RT-PCR检测胰岛β细胞相关基因的表达,并采用免疫细胞化学染色检测胞浆胰岛素的表达。此外,诱导后细胞分泌的胰岛素定量及胰岛素释放实验将采用化学发光法进行检测。将经诱导后的细胞移植到糖尿病小鼠的右侧肾被膜下。在移植后16 d持续检测小鼠的血糖水平,最后对右侧肾脏进行免疫组化检测。结果：经诱导后,细胞能表达胰岛β细胞相关基因;免疫细胞化学染色也能检测到胞浆有胰岛素的表达;而且这些细胞能对糖刺激有所反应。细胞被移植到糖尿病小鼠的肾被膜下,能起降血糖作用。其肾脏的免疫组化显示：肾被膜下有胰岛素阳性细胞。结论：人骨髓源干细胞具有向胰岛素分泌细胞分化的潜能,这将为糖尿病细胞治疗提供丰富的细胞来源。     

骨髓间充质干细胞对致敏小鼠造血干/祖细胞移植植入的影响

目的: 前期的研究已经证实致敏小鼠造血干/祖细胞移植植入失败率高。本研究拟通过骨髓间充质干细胞(MSCs)进行干预,观察能否提高造血干、祖细胞移植的植入率。方法: 应用贴壁培养法体外培养正常小鼠骨髓MSCs,并分为6个实验组,包括实验组1:d11 MSCs干预的致敏组;实验组2: d0 MSCs干预的致敏组;实验组3:d11和d0 2次MSCs干预的致敏组;实验组4: 无MSCs干预的致敏小鼠对照组;实验组5:无MSCs干预的正常小鼠(非致敏小鼠)移植对照组;实验组6:无MSCs干预的正常小鼠不移植对照组。观察指标包括生存分析、移植效果分析(血象改变、骨髓细胞恢复及嵌合分析等)和移植物抗宿主病(GVHD)检测,最终评估MSCs干预对各实验组异基因造血干/祖细胞移植植入率的影响效果。结果: 与对照组(实验组4、5、6)比较,MSCs干预(实验组1、2、3)在2次异基因脾细胞注射法致敏的动物模型进行异基因造血干/祖细胞移植时,未能促进骨髓造血干/祖细胞移植的植入,也未能延长致敏动物移植后的生存时间。结论: 体内应用1×10⁶ MSCs干预,未能促进2次异基因1×10⁶ C57BL/6小鼠脾细胞输注法建立的重度致敏模型异基因造血干/祖细胞移植的植入。     

神经干细胞移植对HIBD新生大鼠学习记忆的影响

目的：探讨脑内移植胚鼠神经干细胞 (NSCs)对新生大鼠缺氧缺血性脑损伤(HIBD)后学习记忆的影响。 方法： 分离孕龄14 d的Sprague-Dawley（SD）大鼠胚胎前脑皮质，采用无血清悬浮培养的方法获得细胞克隆；7 d龄新生大鼠随机分为假手术组（n=10）、HIBD组（n=11）和移植组（n=13），后两组结扎左侧颈总动脉联合8%氧吸入制作HIBD模型，损伤后3 d利用立体定位仪分别在左侧海马区植入培养基作为对照或BrdU 标记的NSCs，观察植入4 周后大鼠学习记忆功能的恢复情况。计数海马CA1区正常神经元，间接免疫荧光法观察移植细胞在脑内的存活、迁移情况。 结果： 在放射形迷宫测试中，移植组较对照组表现出明显的改善，觅水时间缩短(61.40 s±24.83 s vs 89.32 s±31.52 s)，错误次数（2.65±0.57 vs 3.78±0.41）及重复次数明显减少(0.32±0.43 vs 0.81±0.47)(P<0.05)。BrdU间接免疫荧光显示移植后4周，在脑内可见存活的NSCs在海马内广泛分布；尼氏染色显示移植可明显减少海马CA1区的细胞丢失。 结论： 脑内移植胚鼠NSCs对HIBD新生大鼠的学习记忆恢复有良好的促进作用。     

豚鼠脂肪间充质干细胞植入耳聋模型修复听力的作用

背景：脂肪间充质干细胞是否是治疗因毛细胞退化、缺失所造成的感音神经性聋的福音呢？ 目的：探讨豚鼠脂肪间充质干细胞经耳蜗鼓阶途径植入感音神经性耳聋动物模型后对听力的修复作用。 方法：庆大霉素腹腔注射建立豚鼠感音神经性耳聋动物模型,耳蜗鼓阶途径植入豚鼠脂肪间充质干细胞,分别于植入后1,3周检测听性脑干反应,观察植入脂肪间充质干细胞后耳聋动物听力的变化;并追踪EDU标记的豚鼠脂肪间充质干细胞在耳蜗内的迁移及分布情况。 结果与结论：在植入后1周及3周进行听性脑干反应检测,听力较移植前逐渐好转。植入细胞后1周,细胞大多分布在外淋巴液中,部分迁移至耳蜗柯蒂器贴附于基底膜上,植入细胞后3周,细胞不仅迁移并贴附在Corti器基底膜发挥作用,而且部分迁移到蜗神经,植入时间越长,存活细胞越少。结果表明豚鼠脂肪间充质干细胞通过耳蜗鼓阶途径微孔植入,可以定向迁移并存活最终达到提高听力的目的。中国组织工程研究杂志出版内容重点：干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程全文链接：     

人脐带间充质干细胞移植治疗系统性红斑狼疮

背景：系统性红斑狼疮是一种以多器官或多系统病变和血清中出现多种自身抗体为特征的自身免疫性疾病,目前缺乏有效的治疗方案,而理论上间充质干细胞可用于治疗系统性红斑狼疮。目的：观察人脐带间充质干细胞移植治疗系统性红斑狼疮小鼠的疗效。方法：分离培养人脐带间充质干细胞,并用深红色荧光DiR标记细胞。实验小鼠分5组：正常对照组(C57BL小鼠),模型对照组(C57BL/lpr小鼠),低、中、高剂量脐带间充质干细胞治疗组(C57BL/lpr小鼠),每组10只。各治疗组通过尾静脉注射低、中、高剂量(2×10⁶,1×10⁶,0.5×10⁶个)脐带间充质干细胞,每周1次,连续3周,治疗结束采血测抗核抗体、抗组蛋白抗体、抗双链DNA抗体变化,定量PCR检测OPG和Foxp3基因表达的变化。结果与结论：细胞移植3次后,外周血抗核抗体、抗组蛋白抗体、抗双链DNA抗体均明显下降,CD4⁺CD25⁺T细胞明显升高,OPG和Foxp3基因表达也明显升高,接近正常对照组,与模型对照组相比差异均有显著性意义(P < 0.01)。结果表明人脐带间充质干细胞能使C57BL/lpr小鼠的各项相关指标恢复到C57BL正常鼠水平,以高剂量治疗组效果最明显。中国组织工程研究杂志出版内容重点：干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程全文链接：     

Surface-aminated electrospun nanofibers enhance adhesion and expansion of human umbilical cord blood hematopoietic stem/progenitor cells

Interaction between hematopoietic stem/progenitor cells (HSPCs) and their extra cellular matrix components is an integral part of the signaling control for HSPC survival, proliferation and differentiation. We hypothesized that both substrate topographical cues and biochemical cues could act synergistically with cytokine supplementation to improve ex vivo expansion of HSPCs. In this study, we compared the ex vivo expansion of human umbilical cord blood CD34⁺ cells on unmodified, hydroxylated, carboxylated and aminated nanofibers and films. Results from 10-day expansion cultures showed that aminated nanofiber mesh and film were most efficient in supporting the expansion of the CD34⁺CD45⁺ cells (195-fold and 178-fold, respectively), as compared to tissue culture polystyrene (50-fold, p<0.05). In particular, aminated nanofiber meshes supported a higher degree of cell adhesion and percentage of HSPCs, as compared to aminated films. SEM imaging revealed the discrete colonies of cells proliferating and interacting with the aminated nanofibers. This study highlights the potential of a biomaterials approach to influence the proliferation and differentiation of HSPCs ex vivo.     

含淤胆血清的培养体系从大鼠骨髓细胞中筛选与扩增肝干细胞亚群

目的：探讨采用含淤胆血清的培养体系从骨髓细胞中筛选与扩增骨髓源性肝干细胞的可行性。方法：制备含2％、5％、7％和10％淤胆血清的筛选培养液，培养大鼠骨髓细胞，4d时加入肝细胞生长因子促进肝干细胞生长，2周时行免疫组化与RT—PCR检测肝干细胞标志、糖原染色和尿素合成试验分析功能。结果：在2％淤胆血清中，骨髓细胞不能形成克隆，7％与10％的血清则骨髓细胞逐渐凋亡。在5％的淤胆血清时，骨髓源性肝干细胞在此病理筛选培养液中能够生存并选择性生长，而其他类型细胞则脱落凋亡；第2周时，形成肝细胞样集落，细胞表达胚胎时期肝细胞特征性蛋白，具有肝细胞特有糖原和尿素合成功能。结论：含淤胆血清的微环境筛选培养体系能够有效地从骨髓细胞中筛选骨髓源性肝干细胞，为临床肝细胞替代治疗的获取丰富供体细胞来源提供了新的思路。