骨髓间充质干细胞移植治疗缺氧缺血性脑损伤的现状及进展

骨髓间充质干细胞是中胚层来源的具有自我更新和多项分化潜能的多能干细胞,在适宜的培养条件下可被诱导分化。有证据表明,骨髓间充质干细胞注射入脑后在体内外诸多影响因素作用下,可分化为神经元和成熟的胶质细胞。骨髓间充质干细胞的易获得性,多分化潜能等生物特性,使它在缺氧缺血性脑损伤中显示了巨大的潜在治疗价值。     

骨髓间充质干细胞移植治疗缺血性脑损伤的最新研究进展

脊髓间充质干细胞是一类多潜能的干细胞,它被移植入脑缺血灶后在一定程度上可以转化成为神经元和胶质细胞,从而发挥着替代受损的神经组织的功能。脑缺血是一种发病急且后果比较严重的疾病,探索干细胞移植治疗对缺血性脑损伤的作用具有重要的意义。     

bFGF与骨髓间充质干细胞联合移植对脑损伤后神经再生的影响

探讨碱性成纤维细胞生长因子(bFGF)和骨髓间充质干细胞(BMSCs)联合移植对脑损伤后神经再生的影响。利用血清培养技术获得小鼠BMSCs,行Hoechst33342标记。40只小鼠随机分为4组:正常组、损伤组、BMSCs移植组、bFGF+BMSCs移植组,每组各10只。采用自由落体撞击脑损伤模型,然后经尾静脉注射移植液,2d后行caspase-3免疫荧光染色检测BMSCs的凋亡情况;2w后行HE染色结合形态学图像分析软件计算脑切片的缺损面积、免疫组织化学检测星形胶质细胞及神经元数目变化、Y迷宫测试检测小鼠学习记忆能力。结果显示:bFGF+BMSCs移植组骨髓间充质干细胞的caspase-3表达量是BMSCs移植组的0.5倍;BMSCs移植组和bFGF+BMSCs移植组的学习记忆能力及缺损面积较损伤组有改善(P<0.05),且bFGF+BMSCs移植组与BMSCs移植组比较有显著性差异(P<0.05);GFAP和MAP-2在损伤组表达极少,在BMSCs移植组只有少量表达,而bFGF+BMSCs移植组呈高表达,MAP-2表达水平增高更显著。以上结果提示bFGF+BMSCs移植较BMSCs移植可更好地促进脑损伤后的神经再生。     

骨髓间充质干细胞治疗大鼠急性心肌梗死

目的:比较经不同途径移植骨髓间充质干细胞(BMSCs)治疗大鼠急性心肌梗死(AMI)的疗效,探求更为适合的移植途径。方法:采集大鼠BMSCs,并进行培养及鉴定。以5-氮胞苷(5-aza)10μmol/L,诱导BMSCs为心肌样细胞并鉴定。建立大鼠急性心肌梗死模型并鉴定。对照组不予处理,静脉移植组和心外膜移植组分别经尾静脉和心外膜移植心肌样细胞悬液200μl(心肌样细胞5×10~6),联合移植组同时经尾静脉和心外膜分别移植心肌样细胞悬液各200μl。4周后观察SD大鼠心肌组织形态及蛋白表达情况。结果:静脉移植组、心外膜移植组、联合移植组的心肌梗死区域均可见有DAPI标记阳性的移植细胞,其中联合移植组较静脉移植组、心外膜移植组数量明显增多;H-E染色可见后三组较对照组梗死区域心肌细胞排列整齐,细胞核较完整,联合移植组梗死改善程度明显;后三组较对照组血管紧张素转换酶2(ACE2)表达水平升高,联合移植组较静脉移植组、心外膜移植组升高水平更显著。结论:经静脉、心外膜和两者联合移植诱导后的BMSCs均能促进梗死部位的组织修复,抑制心室重构,其中联合移植途径治疗效果更明显。     

骨髓间充质干细胞移植治疗肝硬化的研究进展

肝硬化是临床中常见的慢性进行性肝病,目前治疗晚期肝硬化最有效的方法是肝脏移植,但肝源缺乏、费用昂贵、移植排斥反应及长期应用免疫抑制剂引起并发症等成为限制其广泛应用的主要原因.干细胞移植有利于受损肝组织修复,能够代偿部分肝功能,已成为治疗肝病的一种新方法.就骨髓间充质干细胞移植治疗肝硬化的基础、临床研究进展、存在的问题以及发展前景作一综述,旨在为其进一步研究提供理论依据.     

骨髓间充质干细胞移植治疗重症急性胰腺炎肺损伤

BACKGROUND:A large number of studies have confirmed that bone marrow mesenchymal stem cells can couple with the circulation of the blood to other organs, promote pancreatic tissue repair injury and reduce pulmonary fibrosis, which have certain therapeutic effects on pancreas and lung injuries. OBJECTIVE:To study the therapeutic effect on severe acute pancreatitis-associated lung injury in rats after the transplantation of bone marrow mesenchymal stem cells. METHODS:Animal models of severe acute pancreatitis-associated lung injury were prepared in rats via retrograde injection of 4% sodium taurocholate. Sprague-Dawley rats were randomized into three groups and received bone marrow mesencnymal stem cell injection via the tail vein in transplantation group, the same volume of normal saline in control group, or no treatment in normal groups. All the treatments in each group were performed 24 hours after modeling. Twenty-four hours after transplantation, hematoxylin-eosin staining of the pancreatic and lung tissues was performed. mRNA expressions of tumor necrosis factor-α and interleukin-1β in pancreatic and lung tissues were detected. ELISA kit was used to detect levels of serum C-reactive protein and tumor necrosis factor-α. RESULTS AND CONCLUSION:After modeling, under hematoxylin-eosin staining, there were a large number of inflammatory cells infiltrating in the damaged pancreatic tissues, accompanied by incomplete acinar structures, seriously destroyed lobular structures, alveolar fusion in the lung tissues, thickening of the alveolar walls, and a large amount of inflammatory cells infiltrating in the alveoli. These findings indicated successful modeling of severe acute pancreatitis-associated lung injury in rats. After cell transplantation, the number of infiltrated inflammatory cells in the damaged pancreatic tissue was reduced, with clear lobular structures and no bleeding from the acini; the structure of lung tissues was clear, with complete alveolar walls, and the width of alveolar space was reduced. Immunohistochemical results showed that transplanted DAPI-labeled bone marrow mesenchymal stem cells were aggregated in the pancreas and lung tissue, and uneven distributed in the damaged area. No DAPI expression in the pancreas and lung tissue was found in the control group, indicating transplanted bone marrow mesenchymal stem cells migrated into the damaged pancreas and lung tissue through the blood circulation, to further repair the damage area. RT-PCR test results showed that compared with the control group, bone marrow mesenchymal stem cell transplantation significantly reduced the levels of tumor necrosis factor-α and interleukin-1β in the pancreatic and lung tissues (P < 0.05). Higher levels of C-reactive protein and tumor necrosis factor-α were found in the control group compared with the normal group (P < 0.01), while the lower levels were obtained in the control group (P < 0.05). To conclude, our findings suggest that bone marrow mesenchymal stem cell transplantation is an effective therapy for severe acute pancreatitis-associated lung injury, and its mechanism may be associated with the reduction of inflammatory reactions and translation into the pancreas and lung tissue.     

人参皂苷诱导骨髓间充质干细胞促进创伤性颅脑损伤的神经再生

背景：以往研究表明骨髓间充质干细胞治疗神经疾病方面已经取得了一定成效,能明显促进神经功能改建,但关于基因及药物调控的相关研究目前尚未取得突破性进展。 目的：探讨人参皂苷诱导骨髓间充质干细胞分化对创伤性颅脑损伤后神经再生的影响。 方法：采用液压冲击法建立大鼠颅脑创伤模型,随机分为颅脑损伤组、骨髓间充质干细胞组、人参皂苷诱导分化的骨髓间充质干细胞组。移植后2周采用Western blot检测创伤脑组织神经生长因子及脑源性神经营养因子表达水平,免疫组织化学法检测BrdU标记的阳性细胞数量;移植后1,3 d及1,2周进行动物神经学缺损评分。 结果与结论：人参皂苷诱导分化的骨髓间充质干细胞组大鼠脑创伤组织神经生长因子及脑源性神经营养因子蛋白表达水平明显高于骨髓间充质干细胞组和颅脑损伤组(P < 0.05);人参皂苷诱导分化的骨髓间充质干细胞组BrdU标记的阳性细胞数量明显多于骨髓间充质干细胞组和颅脑损伤组(P < 0.05);移植后3 d及1,2周,人参皂苷诱导分化的骨髓间充质干细胞组大鼠神经功能障碍评分低于骨髓间充质干细胞组和颅脑损伤组(P < 0.05)。结果表明经人参皂苷诱导分化后的骨髓间充质干细胞移植可以促进创伤性颅脑损伤大鼠的神经再生,较单独应用骨髓间充质干细胞移植效果显著。 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     

骨髓间充质干细胞移植治疗骨质疏松的研究进展

骨质疏松症被定义为一种系统性骨骼疾病,其特征是骨量低、骨组织微结构恶化、骨脆性和骨折易感性增加。 目前有2亿多人患有骨质疏松症,但由于人口老龄化和人均寿命延长,受影响的人数仍在急剧增加,这是一个重大的公共卫生问题。目前,治疗骨质疏松症的药物开发已经取得了重大进展,但药物治疗并不能逆转骨丢失,且会给患者带来一系列毒副作用。大量研究表明,骨髓间充质干细胞的归巢作用、成骨分化和细胞因子作用在骨质疏松发病过程中发挥重要作用。 移植骨髓间充质干细胞作为一种新方法,不仅能避开药物治疗的副作用而且能从根本上治疗骨质疏松,具有巨大的潜能和应用价值,但许多问题也有待解决。     

人脐带间充质干细胞移植治疗大鼠创伤性脑损伤

背景：脐带间充质干细胞体内移植治疗脑损伤的效果目前尚较少见报道。 目的：观察人脐带间充质干细胞移植对大鼠液压冲击脑损伤的治疗作用。 方法：从新生儿脐带中分离、培养间充质干细胞。制作中度打击大鼠脑损伤模型。实验分为4组：①脐带间充质干细胞移植组：损伤后原位移植脐带间充质干细胞。②对照组：损伤后原位注射等量DMEN/F12培养基。③单纯损伤组：仅施行损伤。④假损伤组：仅切开头皮及颅骨,不实施机械性损伤。 结果与结论：脐带间充质干细胞移植后1~3周,动物神经功能评分较对照组明显改善;4周后,各组动物神经功能评分均恢复正常。免疫组织化学检测表明少部分移植细胞表达神经元特异性烯醇化酶,胶质纤维酸性蛋白。与对照组相比,移植组损伤区血管内皮生长因子表达明显增加,凋亡细胞减少。提示脐带充间质干细胞脑内移植有助于促进创伤性脑损伤后的早期功能恢复,这种治疗效果是通过刺激宿主细胞分泌血管内皮生长因子,增加损伤区微血管密度,抑制宿主细胞凋亡等实现的。     

骨髓间充质干细胞移植联合基因治疗缺血性脑血管病

背景：骨髓间充质干细胞移植后是否向神经细胞定向分化,不仅受细胞自身基因调控,更取决于所处外环境中各种信号的影响。 目的：就骨髓间充质干细胞的生物学特性、转基因治疗缺血性脑血管病的理论依据以及动物实验和临床研究进展进行综述。 方法：由第一作者应用计算机检索PubMed数据库2006年1月至2011年12月及中国期刊网全文数据库2006年1月至2011年12月有关骨髓间充质干细胞生物学特性、转基因治疗缺血性脑血管病的理论依据以及相关动物实验和临床研究的文章,英文检索词为“Bone Marrow Mesenchymal Stem Cells (BMSCs) transplant,Gene therapy,Ischemic Cerebrovascular Disease(ICD)”,中文检索词为“骨髓间充质干细胞移植,基因治疗,缺血性脑血管病”。排除重复性研究及Meta分析,共保留25篇文献进行综述。 结果与结论：对缺血性脑血管病进行细胞移植和基因治疗改善神经功能是目前的研究热点。骨髓间充质干细胞是细胞基因工程治疗的良好载体,转基因培养后能高效地诱导分化为神经细胞,为移植治疗缺血性脑血管病提供细胞源。利用骨髓间充质干细胞移植联合基因治疗缺血性脑血管病已在动物模型上取得了令人瞩目的成就,临床应用还有待于进一步研究,尤其是生物安全性问题仍需进一步探索。     

丙泊酚联合骨髓间充质干细胞移植对脊髓损伤大鼠后肢功能及电生理的影响

背景：研究发现,骨髓间充质干细胞具有修复神经元的作用,但单纯骨髓间充质干细胞移植对神经系统损伤的修复作用仍不理想。 目的：探讨骨髓间充质干细胞移植联合丙泊酚对脊髓损伤大鼠后肢功能和电生理的影响。 方法：80只成年的Wistar大鼠,建立脊髓损伤模型,按照随机数字表法分为4组(n=20)：骨髓间充质干细胞组、对照组、联合组、丙泊酚组。建模后6 h通过1 mL注射器经尾静脉注入骨髓间充质干细胞悬液、细胞培养液、骨髓间充质干细胞悬液+丙泊酚注射液、丙泊酚注射液。分别于造模前、造模后1,3 d与1-4周通过BBB评分、改良Tarlov评分、斜板试验进行运动功能评定。造模后4周取材用荧光显微镜观测PKH-26标记的骨髓间充质干细胞存活及分布情况,病理切片进行苏木精-伊红染色。第4周进行辣根过氧化物酶示踪分析神经纤维的再生情况,运动诱发电位和体感诱发电位分析大鼠神经电生理恢复情况。 结果与结论：①大鼠下肢运动功能评价联合组优于骨髓间充质干细胞组及丙泊酚组,骨髓间充质干细胞组和丙泊酚组优于对照组。②丙泊酚组和骨髓间充质干细胞组损伤区可见少量神经轴索样的结构,该脊髓空洞比较小,联合组可见较多的神经轴索样结构,未见脊髓空洞。对照组可见脊髓组织缺失及脊髓空洞形成,无神经轴索通过。③辣根过氧化物酶阳性神经纤维数和PKH-26阳性细胞：对照组<丙泊酚组、骨髓间充质干细胞组<联合组,各组之间差异均有显著性意义(P < 0.05)。④运动诱发电位和体感诱发电位的潜伏期：对照组>丙泊酚组、骨髓间充质干细胞组>联合组,各组之间差异均有显著性意义(P < 0.05)。⑤运动诱发电位和体感诱发电位的波幅：对照组<丙泊酚组与骨髓间充质干细胞组<联合组,各组之间差异均有显著性意义(P < 0.05)。⑥结果表明丙泊酚、骨髓间充质干细胞均能促进脊髓损伤大鼠神经突触的再生,改善大鼠电生理功能及肢体运动功能,二者联用效果更好。 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     

骨髓间充质干细胞调节心脏移植大鼠的免疫功能

BACKGROUND:Heart transplantation is an effective method for treatment of end-stage heart failure, but immune rejection that seriously impact therapeutic effacicy is easy to occur after transplantation. OBJECTIVE:To investigate the regulatory effect of bone marrow mesenchymal stem cells on the immune function of rats undergoiong heart transplantation. METHODS:Twenty Lewis rats were enrolled as donors, and 20 Wistar rats as recipients. Heart transplantation models were established in the Wistar rats. These 20 model rats were randomized into cell transplantation and control group with 10 rats in each group. Forty-eight hours after heart transplantation, rats in the cell transplantation group were given bone marrow mesenchymal stem cell suspension (1 mL, 2×10⁸ cells/L) via the tail vein, while rats in the control group were given normal saline in the same dose. Then, the expression levels of serum interleukin-2, interleukin-10 and percentage of CD4⁺, CD8⁺, CD4⁺/CD8⁺, CD4⁺CD25^high, CD4⁺CD25^high Foxp3⁺ T cells in the venous blood were detected in the two groups at 7 days after cell transplantation. Additionally, rat myocardial tissues were taken and observed pathologically. RESULTS AND CONCLUSION:The survival time of the cell transplantation group was significantly longer than that of the control group (P < 0.05). The expression level of interleukin-2 showed no significant difference between the two groups (P > 0.05), but the level of interleukin-10 in the cell transplantation group was significantly higher than that in the control group (P < 0.05). Compared with the control group, the percentage of CD4⁺/CD8⁺, CD4⁺CD25^high, CD4⁺CD25^high Foxp3⁺ and CD4⁺ T cells was significantly higher, and the percentage of CD8⁺ T cells was significantly lower in the cell transplantation group (P < 0.05). Histopathological findings showed that there were a small amount of infiltrated lymphocytes in the cell transplantation group with the presence of slight bleeding and edema, and these inflammatory reactions were milder than those in the control group. These findings indicate that bone marrow mesenchymal stem cell transplantation can effectively reduce the rejection in rats undergoing heart transplantation.     

大黄素对骨髓间充质干细胞移植治疗缺血性再灌注肾损伤的影响

BACKGROUND: Studies have shown that emodin protects against intestinal ischemia-reperfusion injury by inhibiting the release of inflammatory factors.     

碱性成纤维细胞生长因子基因修饰骨髓间充质干细胞移植修复急性肾损伤

BACKGROUND:It has been confirmed that basic fibroblast growth factor (bFGF) can promote the growth, proliferation, differentiation and functional expression of most cells derived from neuroderm and mesoderm. OBJECTIVE:To investigate the effect of bFGF-transfected bone marrow mesenchymal stem cell transplantation in rats with acute kidney injury. METHODS:bFGF genes were transfected into bone marrow mesenchymal stem cells via an adenovirus vector, and then expression of bFGF in transfected cells was identified using RT-PCR technology. Rat models of acute kidney injury were prepared by clipping bilateral renal pedicles, and then randomized into three groups (n=20): rats were given injection of bone marrow mesenchymal stem cell suspensions via tail vein as negative transfected group, those given injection of bFGF-transfected bone marrow mesenchymal stem cell suspensions via tail vein as bFGF-transfected group, and the others given injection of DMEM via tail vein as model group. Four weeks later, levels of serum creatinine and urea nitrogen were detected, expressions of connective tissue growth factor and growth factor in renal tissues were detected by Western blot assay, and morphology of renal tissues was observed using hematoxylin-eosin staining. RESULTS AND CONCLUSION:bFGF genes were successfully transfected into bone marrow mesenchymal stem cells. Compared with the model group, the levels of serum creatinine and urea nitrogen were significantly reduced in bFGF-transfected and negative transfected groups, especially in the bFGF-transfected group (P < 0.05), while expressions of connective tissue growth factor and transforming growth factor in renal tissues in bFGF-transfected and negative transfected groups were significantly weakened in these two groups (P < 0.05), but there were no significant differences between the bFGF-transfected group and negative transfected group (P > 0.05). Besides, renal tissues necrosis and inflammatory reactions were mitigated in the negative transfected group; renal tubules with normal outlines and no overt necrotic cells could be found in the bFGF-transfected group. These findings show that bFGF-transfected bone marrow mesenchymal stem cell transplantation plays a better role in acute kidney injury repair in rats.     

过表达Shootin1的骨髓间充质干细胞移植治疗脊髓损伤

BACKGROUND:Genetic modification by Shootin1 aims to effectively improve neural differentiation of bone marrow mesechymal stem cells (BMSCs) in the injured spinal cord, thereby promoting functional recovery from spinal cord injury after cell transplantation. OBJECTIVE:To explore the nerve regeneration ability of transplanted BMSCs overexpressing Shootin1 in rats with spinal cord injury. METHODS:BMSCs were transfected using adenovirus-Shootin1 for 48 hours. Then, immunofluorescence staining was used to detect Nestin and NeuN expression levels in the transfected cells under in vitro neuronal induction and differentiation. Animal models of spinal cord injury were made in rats using modified Allen’s method. Thirty minutes later, Shootin1-transfected BMSCs and non-transfected BMSCs were respectively injected into the subarachnoid space of the rats in the transfection and non-transfection groups, respectively. Rats in the model group were given no treatment. Five weeks after modeling, spinal cord samples were taken from each rat to make frozen sections for detection of nerve related markers RESULTS AND CONCLUSION:After 48-hour adenoviral transfection, Shootin1 expression was successfully detected in BMSCs. After 7-day in vitro induction, the cell morphology in the three groups varied, and there was no significant difference in the expression of Nestin and NeuN between the transfection and non-transfection groups. Basso, Beattie and Bresnahan scores were higher in the two cell transplantation groups than the model group. Increased expression levels of Nestin, NeuN, GFAP, MAP-2, ChAT and SYN were observed in both two cell transplantation groups, indicating a strengthened ability of nerve regeneration. Our experimental findings further confirm that BMSCs transplantation for spinal cord injury has achieved good outcomes, and Shootin1 protein plays a certain role in nerve regeneration and functional recovery after spinal cord injury. However, Shootin1 overexpression shows no obvious additional effects in combination with BMSCs transplantation, and further studies on the optimization of BMSCs transplantation for spinal cord injury are necessary.     

灯盏花素联合骨髓间充质干细胞移植促进脑梗死大鼠神经功能恢复

背景：灯盏花素治疗脑梗死疗效确切、不良反应少、远期疗效稳定、毒副作用少,能够改善脑梗死后中枢神经系统受损区的微环境。 目的：探讨灯盏花素注射液联合骨髓间充质干细胞移植对脑梗死神经功能恢复及生长相关蛋白43表达的影响。 方法：将60只大脑中动脉闭塞模型SD大鼠随机分为脑梗死组、骨髓间充质干细胞移植组和联合组。建模6 h后通过尾静脉注射1 mL PBS、1 mL骨髓间充质干细胞悬液(2.5×106)、1 mL骨髓间充质干细胞悬液(2.5× 106)+灯盏花素注射液75 mg/kg,连续注射5 d,1次/d。 结果与结论：移植后2周,免疫荧光法观察到BrdU阳性标记的骨髓间充质干细胞主要集中于梗死灶周围且联合组的BrdU阳性细胞数量多于骨髓间充质干细胞组及脑梗死组(P < 0.01);移植后1,2,3周联合组的神经功能障碍评分明显低于骨髓间充质干细胞组及脑梗死组(P < 0.05);移植后2周,与骨髓间充质干细胞组及脑梗死组比较,联合组的脑梗死面积明显减小,水肿程度明显减轻,生长相关蛋白43的表达明显增高(P < 0.05)。光镜下联合组脑梗死组织中胶质细胞明显增生,脑组织水肿有明显减轻。结果表明灯盏花素注射液联合骨髓间充质干细胞可明显减轻脑梗死面积及水肿程度,促进大鼠脑梗死后神经功能恢复及梗死灶生长相关蛋白43的表达。 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     

骨髓间充质干细胞移植治疗老年性痴呆模型大鼠的行为学检测

BACKGROUND:More recently, studies have demonstrated that bone marrow mesenchymal stem cells can be induced in vitro to differentiate into neuron-like cells that are used for in vivo transplantation to repair nerve damage. OBJECTIVE:To study the effect of bone marrow mesenchymal stem cell transplantation on learning and memory ability of senile dementia rats. METHODS:Thirty male Sprague-Dawley rats were randomly divided into three groups: normal control group, stem cell therapy group and model control group. Rats in the latter two groups were used to establish animal models of senile dementia by intracranial injection of β-amyloid 1-40. Three weeks after modeling, rats were given bilateral hippocampal injection of induced bone marrow mesenchymal stem cell suspension in the stem cell therapy group, whereas no treatment was given in the normal control and model control groups. Morris water maze test was used to detect learning and memory ability of rats, and rat’s brain tissues were detected pathologically using hematoxylin-eosin staining. RESULTS AND CONCLUSION:After modeling, the escape latency was higher and the cross-platform frequency was lower in the model control group compared with the normal control group. After cell transplantation, the escape latency and cross-platform frequency were gradually shortened and increased with time, respectively. Compared with the model control group, the learning and memory abilities of rats were improved in the stem cell therapy group. The brain tissues were relatively intact in structure and exhibited less cell degeneration and necrosis in the stem cell therapy group compared with the model control group. To conclude, bone marrow mesenchymal stem cell transplantation exerts certain therapeutic effects on senile dementia by effectively improving the learning and memory ability.     

不同途径移植骨髓单个核细胞修复创伤性脑损伤

背景：干细胞移植存在多种途径,目前还无法确定哪一种是最佳途径。而对于不同的脑损伤个体,所移植的细胞种类、移植途径和移植时间都将会影响到治疗效果。目的：探讨不同途径移植骨髓单个核细胞对脑损伤大鼠神经功能的影响。方法：Ficoll淋巴细胞分离液梯度离心分离大鼠骨髓单个核细胞,CFDA-SE体外标记后备用;自由落体法制备大鼠创伤性脑损伤模型,模型制作成功后,立即通过损伤区、侧脑室和颈内动脉移植CFDA-SE标记的骨髓单个核细胞,每一种移植途径都设对照组(以等体积的DMEM代替骨髓单个核细胞)。治疗后不同时间点进行mNSS评分,最后一次行为学评分完毕取脑组织,荧光倒置显微镜下观察骨髓单个核细胞在损伤区域的存活和迁移情况。结果与结论：治疗后7,10,14 d,对照组和移植组mNSS评分均较1 d和3 d时降低(P < 0.05);治疗后7 d和10 d,颈内动脉移植组和对照组相比mNSS评分降低(P < 0.05);治疗后14 d,颈内动脉移植组荧光细胞数量较其他组多(P < 0.05),且分布广。结果表明经颈内动脉移植骨髓单个核细胞能明显改善大鼠神经功能,且移植细胞能够在损伤区大量存活和迁移。 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