脐带间充质干细胞移植对系统性红斑狼疮免疫系统的影响

背景：目前有关脐带间充质干细胞对系统性红斑狼疮的免疫抑制作用及对各个脏器的影响报道较少。 目的：探讨脐带间充质干细胞治疗MRL/lpr狼疮鼠的疗效及对免疫系统和各个脏器的影响。 方法：MRL/lpr狼疮小鼠随机分为对照组、环磷酰胺组、环磷酰胺+脐带间充质干细胞组、脐带间充质干细胞组。对照组给以生理盐水,其他各组分别给予相应的治疗。采用考马斯亮蓝法检测24 h尿蛋白定量;酶联免疫吸附法检测白细胞介素10、白细胞介素17、干扰素γ、PDGF、 抗ds-DNA抗体;间接免疫荧光法检测抗核抗体水平;常规病理苏木精-伊红染色观察小鼠的肾脏病理改变肾脏病理改变;免疫组织化学法检测间充质干细胞表面标志CD44、CD105在肾脏、肺脏、脾脏中的表达。 结果与结论：①环磷酰胺+脐带间充质干细胞组干扰素γ、白细胞介素17、白细胞介素10水平与对照组相比明显降低((P < 0.05)。②32周时环磷酰胺+脐带间充质干细胞组和脐带间充质干细胞组尿蛋白定量低于环磷酰胺组和对照组(P < 0.01)。③32周时环磷酰胺+脐带间充质干细胞组抗ds-DNA抗体水平与对照组相比明显降低。④脐带间充质干细胞组肾小球硬化及炎性细胞浸润程度均较对照组为轻。⑤32周时肾脏、肺脏、脾脏中间充质干细胞表面标志CD44、CD105表达为阴性。提示,应用脐带间充质干细胞移植治疗MRL/lpr狼疮鼠可以显著降低狼疮活动指标,对狼疮肾炎具有治疗作用,同时可以通过降低促炎因子的水平发挥免疫抑制作用。     

脐带间充质干细胞移植治疗难治性系统性红斑狼疮3 年随访

目的:观察脐带间充质干细胞(UC-MSC)治疗系统性红斑狼疮(SLE)前后患者免疫学指标、细胞因子表达量的变化和临床疗效。方法:选择10 例SLE 患者,在激素、免疫抑制剂治疗基础上,静脉输注培养增殖6 代以内的UC-MSC,检测UC-MSC 移植治疗SLE 前后与其免疫病理相关细胞因子CTLA-4、IL-15、IL-2、CD86、IL-17c、Foxp3、TGFβ2 的相对表达量。治疗前后进行SLEDAI 评分测定并检测血尿常规、24 h 尿蛋白定量、肝肾功能、免疫球蛋白、补体水平。结果:UC-MSC 移植疗后IL-15、IL-2 表达量均下降, CTLA-4 表达量上升, CD86、IL-17c、Foxp3、TGFβ2 表达量的差异无显著性意义;UC-MSC 移植治疗后补体C3、C4 水平、血清白蛋白量较治疗前升高, 24 h 尿蛋白定量、SLEDAI 评分较治疗前降低;UC-MSC 移植治疗SLE过程中10 例移植患者均未出现严重不良反应,无与移植相关并发症。结论:UC-MSC 能够调节SLE 患者体内参与免疫应答调控的细胞因子的表达量;UC-MSC 移植治疗SLE 可升高血清白蛋白及补体C3、C4 水平,降低24 h 尿蛋白量,减轻肾脏损伤,改善患者的临床症状;UC-MSC 移植治疗SLE 具有良好的安全性;UC-MSC 移植可能是一种可行的治疗SLE 的方法。     

脐带间充质干细胞移植治疗系统性红斑狼疮

<正>据南京大学医学院附属鼓楼医院2014年5月25日[Arthritis Res Ther,2014,16(2):R79.]报道,南京大学医学院附属鼓楼医院、江苏大学附属医院及苏北人民医院、江苏省人民医院等多家研究中心联合进行了一项用脐带间充干细胞移植治疗严重系统性红斑狼疮(SLE)的多中心临床试验。结果表明,脐带间充质干细胞移植能够对SLE患者产生满意的临床疗效。SLE是一种常见的和潜在致命的自身免疫性疾病。其特征在于机体产生大量抗体,并与体内相应的自身抗原结合形成相应的免疫复合物,对肾脏、心血管、神经、肌肉骨骼和皮肤产生系统损害。     

脐带间充质干细胞与系统性红斑狼疮

系统性红斑狼疮（SLE）是一种以免疫细胞活化和自身抗体产生为特征的自身免疫病。间充质干细胞（MSC）是属于中胚层的一类多能干细胞,不仅具有多向分化潜能,还有多种免疫调节作用。许多研究表明MSC对可以通过调节免疫细胞（上调Foxp3’T细胞水平、下调Th17细胞水平、抑制浆细胞的成熟等）的表达以及细胞因子（IL-10、TGF—β、TNF—α等）的分泌干预抑制SLE,并且免疫原性较低。尤其脐带MSC,因为其独特优势,目前已经成为干细胞干预治疗SLE的研究热点。     

脐带间充质干细胞与系统性红斑狼疮

Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by the activation of immune cells and production of autoantibodies by plasma cells and release of cytokines. Mesenchymal stem cells (MSC) are widely studied as an alternative cell source for their ability to differentiate into multiple mesenchymal lineages. An important function for MSC for autoimmune diseases is their immunomodulatory effect on various activated lymphoid cells, such as T cells B cells, NK cells, and dendritic cells; and on cytokines , such as IL-10, TGF-β, TNF-α, et al. Umbilical cord MSCs (UC-MSCs) had a higher proliferation capacity and lower immunogenicity, indicating that it may be a novel alternative source of human MSC for clinical application. In this review, we introduce the immunomodulatory effect and clinical application of UC-MSC in SLE based on recent findings in human and animal models.     

骨髓间充质干细胞移植治疗系统性红斑狼疮

BACKGROUND: The non-specific immune suppression method is generally used for treatment of systemic lupus erythematosus, but poor prognosis, such as infection and high recurrence rate, exists. OBJECTIVE: To evaluate the therapeutic effect of bone marrow mesenchymal stem cell transplantation on systemic lupus erythematosus in mice. METHODS: Sixteen mice with systemic lupus erythematosus were equivalently randomized into control and experimental groups, or then subjected to passage 3 bone marrow mesenchymal stem cell transplantation or the equal volume of normal saline via the tail vein, respectively. Mouse urine samples were collected to detect urine protein levels by Bradford method. Blood samples from the tip of the mouse tail were extracted to detect serum anti-ds-DNS antibody concentration by radioimmunoassay. Mouse kidney tissues were taken and observed pathohistologically through hematoxylin-eosin staining and immunohistochemistry staining under microscope. Flow cytometry was used to detect the expression of CD4+CD25+T cells in the inner canthus blood, fresh spleen and thymus. RESULTS AND CONCLUSION: Within 10 weeks after cell transplantation, the urine protein levels in the two groups were gradually increased, and the rising velocity was higher in the control group than in the experimental group. From the 4th to 10th week, the urine protein levels in the experimental group were significantly lower than those in the control group (P < 0.05). In the control group, lymphocyte infiltration was visible in the kidney tissues with a few of plasmocytes, and pathological findings showed the mice presented with interstitial nephritis; in the experimental group, the mice had no pathological changes in the kidney. In the two groups, immune complexes were found in the mesangial area, which showed a patch-like distribution in the control group and a punctate distribution in the experimental group; the relative proportion of the occupied area in the experimental group was significantly lower than that in the control group. The expression level of CD4+CD25+T cells in the blood and thymus were significantly higher in the experimental group than the control group (P < 0.05), and the expression level of CD4+CD25+T cells in the spleen was slightly higher in the experimental group than the control group with no significant difference (P > 0.05). The serum anti-ds-DNA antibody concentration in the experimental group was significantly lower than that in the control group (P < 0.05). Taken together, bone marrow mesenchymal stem cell transplantation can improve the pathological damage in systemic lupus erythematosus mice, and has a certain therapeutic effect on systemic lupus erythematosus.       

人脐带间充质干细胞的研究进展

脐带间充质干细胞是存在于脐带沃顿胶和血管周围组织中的一种干细胞,具有多向分化和自我更新的潜能。脐带间充质干细胞可分化为骨细胞、软骨细胞、脂肪细胞、肌细胞和神经细胞,并且具有免疫调节性;脐带作为医疗废弃物来源丰富,对供者无不利影响,无伦理问题的限制,这为细胞治疗和组织工程提供了新的种子细胞。     

人脂肪间充质干细胞对异种小鼠间皮肤移植的免疫调节作用

背景:皮肤移植是治疗大面积烧烫伤最有效的方法之一,如何有效抑制异体皮肤移植后的免疫排斥反应,是目前亟待解决的问题.目的:探讨人脂肪间充质干细胞对异种小鼠间皮肤移植免疫调节作用的影响.方法:取抽脂减肥术后人脂肪组织分离出人脂肪间充质干细胞并培养至第3代,将60只2-4 d龄ICR小鼠随机分为4组,取其皮肤移植至C57BL...     

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。     

移植途径对人脐带间充质干细胞治疗小鼠糖尿病效果的影响

目的:观察不同途径移植人脐带间充质干细胞(hUCMSCs)对小鼠糖尿病的治疗效果。方法:利用增强绿色荧光蛋白和萤光素酶报告系统(EGFP/Luc)标记hUCMSCs,通过胰腺包膜下途径或尾静脉途径将携带萤光标记的hUCMSCs移植到链脲霉素诱导的糖尿病模型小鼠体内。移植后利用萤光素酶报告基因追踪hUCMSCs在活体内的迁移和定位;组织学检测小鼠胰岛形态变化;功能学实验动态检测小鼠血糖、血清胰岛素水平和糖耐量。结果:活体生物发光成像显示胰腺包膜下途径移植的hUCMSCs主要定位于胰腺,尾静脉途径移植的hUCMSCs主要定位于肺,仅少量细胞向胰腺部位迁移。组织学检测发现,胰腺包膜下途径移植的小鼠胰岛边界清晰,无炎症细胞浸润;而尾静脉途径移植的小鼠胰腺组织有少量炎症细胞浸润和纤维化形成。功能学检测发现胰腺包膜下移植较尾静脉移植降低小鼠血糖作用显著,血糖可降至接近正常水平,且血清胰岛素水平明显升高,葡萄糖的调节能力显著增强。结论:移植途径对hUCMSCs治疗糖尿病的效果有影响。胰腺包膜下移植在降低小鼠血糖、升高胰岛素水平及改善胰岛功能方面均优于尾静脉移植。     

脐带间充质干细胞移植对不同证型系统性红斑狼疮患者的效果分析

背景：系统性红斑狼疮按中医辨证分为热毒炽盛等4个症型,治疗以补肾养阴,清化淤毒为主,但仍有许多患者治疗效果不佳。间充质干细胞具有多向分化、造血支持和免疫调节的功能,目前已有多项研究用于治疗难治性、复发性系统性红斑狼疮,取得良好疗效。目的：探讨脐带间充质干细胞移植对不同证型系统性红斑狼疮患者的疗效。方法：系统性红斑狼疮患者21例,经中医辨证分成热毒炽盛证、肝肾阴虚证、脾肾阳虚证及气滞血瘀证4型,分别统计患者脐带间充质干细胞移植前后各型的临床及实验室指标变化。结果与结论：脐带间充质干细胞移植1,3,6个月均可有效减少系统性红斑狼疮患者实验尿蛋白含量,降低系统性红斑狼疮疾病活动指数评分(P < 0.01)。与移植前比较,移植脐带间充质干细胞后1,3,6个月可显著减少肝肾阴虚型患者尿蛋白含量(P < 0.01),移植后1,3个月对热毒炽盛及气滞血瘀型尿蛋白含量为轻度减少(P < 0.05),脾肾阳虚型患者在植后1个月时的尿蛋白含量轻度减少(P < 0.05)。脐带间充质干细胞移植可提高所有中医分型患者的血浆白蛋白含量(P < 0.01),其中对热毒炽盛型效果稍差(P < 0.05)。脐带间充质干细胞移植后各型患者外周血血小板有上升趋势,但与移植前相比差异无显著性意义。结果说明,脐带间充质干细胞移植治疗系统性红斑狼疮有效,对不同症型的系统性红斑狼疮患者的疗效有一定的差异。 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     

脐带间充质干细胞移植治疗脊髓损伤：不同方式的疗效对比

背景：目前,来源于人脐带的间充质干细胞移植途径主要为局部移植,存在创伤大、出血多、并发症多等缺点,限制了其在临床上的广泛应用。目的：探讨静脉移植人脐带间充质干细胞治疗脊髓损伤的可行性。方法：80只Wistar大鼠成功制备脊髓打击模型,随机分为5组：空白对照组10只大鼠不进行任何移植;DMEM局部移植组15只、DMEM静脉移植组15只大鼠分别通过局部、静脉途径移植DMEM;细胞局部移植组20只、细胞静脉移植组20只大鼠分别通过局部、静脉途径移植人脐带间充质干细胞悬液。术后定期行BBB评分、组织学观察和免疫组化检测来评价脊髓修复情况。结果与结论：移植后1 d-2周各组间BBB评分差距小,差异无显著性意义;移植后4-12周,细胞局部移植组、细胞静脉移植组BBB评分明显高于其他3组,差异有显著性意义;细胞局部移植组、细胞静脉移植组间差异无显著性意义(P > 0.05)。组织学观察显示,细胞局部移植组、细胞静脉移植组损伤局部形成的空洞及胶质瘢痕较其他3组都相对减少,而细胞静脉移植组和细胞局部移植组相近。以上结果表明静脉移植的人脐带间充质干细胞能迁移到脊髓损伤部位,对急性脊髓损伤产生修复作用,且效果与局部移植相似。该方式简单易行,避免二次损伤、感染等,为治疗脊髓损伤提供了一种新的细胞移植途径。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：     

移植不同剂量脐带间充质干细胞提高老年痴呆大鼠学习记忆能力的比较

BACKGROUND:To delay the onset of Alzheimer’s disease, transplantation of viable and well-differentiated stem cells is expected to repair neural tissue, which has been an issue of concern. OBJECTIVE:To explore the effects of different doses of human umbilical cord mesenchymal stem cells (hUCMSCs) on learning and memory ability of Alzheimer’s disease rats. METHODS:Fifty Sprague-Dawley rats, 7 months of age, were randomized into normal, model, high-, middle- and low-dose hUCMSCs groups (n=10 per group). Rats in model and UCMSCs groups were used to make Alzheimer’s disease animals through intraperitoneal injection of 150 mg/kg D-galactose for 90 days, and rats in the normal group were given intraperitoneal injection of normal saline for 90 days. In the three hUCMSCs group, passage 3 hUCMSCs at doses of 1×10⁵/0.2 mL/20 g, 5×10⁵/0.2 mL/20 g, and 1×10⁶/0.2 mL/20 g were injected via the tail vein, respectively. Forty-five days after cell transplantation, Morris water maze test was used to detect rat’s learning and memory abilities, and hematoxylin-eosin staining was used to observe pathological changes of the rat hippocampal CA1 region. RESULTS AND CONCLUSION:Compared with the normal group, the rats in the model group showed significant reduction in the ability of learning and memory. Compared with the model group, the escape latency was significantly shortened in the middle-dose hUCMSCs group (P < 0.05), while the number of passing times through the platform was increased significantly (P < 0.05). In the model group, the cells in the hippocampal CA1 region were arranged irregularly with unclear nucleoli and a part of cells were concentrated and deeply stained. In the middle-dose hUCMSCs group, the cells in the hippocampal CA1 region were arranged regularly with clear nucleoli, and only individual cells were stained deeply. These findings indicate that middle-dose hUCMSCs transplantation can improve the learning and memory abilities of Alzheimer’s rats.     

人脐带间充质干细胞移植治疗急性肺损伤

BACKGROUND:Studies have shown that human umbilical cord mesenchymal stem cells can improve pulmonary ventilation function by reducing inflammations. OBJECTIVE:To observe the therapeutic effect of human umbilical cord mesenchymal stem cell transplantation on acute lung injury. METHODS:Thirty Sprague-Dawley rats were randomized into normal group, model group and experimental group. Rats in the latter two groups were used to establish animal models of acute lung injury by intratracheal instillation of lipopolysaccharide. One hour after modeling, rats in the experimental group were intratracheally administered human umbilical cord mesenchymal stem cell suspension (0.1 mL, 1×10⁶ cells), and those in the other two groups were given normal saline in the same dose intratracheally. Twenty-four hours after treatment, the pathological changes of lung tissue were observed using hematoxylin-eosin staining; the wet and dry weight ratio of the lung tissue and the levels of serum interleukin-1 and interleukin-8 were detected. RESULTS AND CONCLUSION:Compared with the normal group, the wet and dry weight ratio of the lung tissue and the levels of serum interleukin-1 and interleukin-8 were significantly increased in the model group (P < 0.05), while compared with the model group, these levels were significantly decreased in the experimental group (P < 0.05). Hematoxylin-eosin staining results showed clear alveolar space structure with complete alveolar septum in the normal group. In the model group, the alveolar septum was markedly thickened, and there was visible pulmonary capillary hyperemia, edema, as well as a large amount of inflammatory cell infiltrations in the pulmonary capillaries and alveolar space. Edema fluid rich in proteins was observed in a part of the pulmonary alveoli, and an extensive transparent membrane formed in the alveolar space. In the experimental group, the alveolar structure was clear, but the alveolar septum became thickened, and red blood cells and a small amount of infiltrated inflammatory cells were leaked from the pulmonary interstitial tissue. In conclusion, human umbilical cord mesenchymal stem cell transplantation for treatment of acute lung injury can reduce inflammatory factor levels and alleviate lung injury.     

脐带间充质干细胞对乳腺癌细胞系MCF-7裸鼠移植瘤生长的影响

背景：已有临床前和临床研究资料表明,间充质干细胞预防和治疗异基因造血干细胞移植后移植物抗宿主病、自身免疫性疾病以及糖尿病等具有显著疗效。但间充质干细胞植入后是否会促进体内肿瘤生长是其临床应用安全性的一个重要体现,目前这部分内容研究尚少。 目的：观察脐带间充质干细胞对人乳腺癌细胞MCF-7荷瘤裸鼠肿瘤生长的影响。 方法：随机抽取BALB/c裸鼠8只作为正常对照组,随机抽取乳腺癌细胞系MCF-7裸鼠分为4组,每组8只,分别为模型对照组、低剂量组、中剂量组和高剂量组。3个剂量组尾静脉注射脐带来源的间充质干细胞,分别为4×104、2×105和1×106个,共给予2次,间隔2周;正常对照组和模型对照组注射生理盐水。实验观察周期为6周。 结果与结论：模型对照组肿瘤体积呈持续增长趋势,观察结束后各剂量组与同期模型对照组动物相比,脐带间充质干细胞有抑制肿瘤体积及质量的趋势,但差异无显著性意义,病理组织学结果显示中高剂量组各有1只动物肺脏可见转移瘤。结果表明脐带间充质干细胞不促进MCF-7裸鼠肿瘤的生长,但可促进MCF-7裸鼠转移瘤的形成。     

人脐带源间充质干细胞向急性肾损伤肾脏的归巢及保护作用

背景：多项研究表明间充质干细胞具有治疗急性肾损伤潜能,脐带源间充质干细胞具有干细胞的共性而且优点很多,如容易分离培养、体外扩增快、免疫原性低、不存在伦理问题等,因此越来越受到国内外研究者的重视。 目的：观察人脐带源间充质干细胞对急性肾损伤大鼠肾组织的修复作用。 方法：将30只大鼠随机分为3组,正常对照组、模型对照组、人脐带源间充质干细胞移植组。正常对照组大鼠仅做暴露肾脏处理,模型对照组、人脐带源间充质干细胞移植组大鼠夹闭双侧肾蒂45 min,细胞移植组手术完成后尾静脉注射经DAPI标记的脐带源间充质干细胞1 mL,模型对照组注射等量的生理盐水。7 d后处死大鼠,全自动生化仪法检测血肌酐、尿素氮水平;取左肾于光镜下观察肾组织病理改变;取右肾于免疫荧光显微镜下观察肾组织上DAPI阳性细胞数。 结果与结论：细胞移植组与模型对照组比较血清肌酐、尿素氮水平明显降低(P < 0.05),提示人脐带源间充质干细胞对肾功能有一定改善作用;细胞移植组与模型对照组比较病理情况明显好转,肾小管坏死评分指数明显降低;细胞移植7 d后肾组织冰冻切片上仍可见散在分布的蓝色荧光细胞。结果表明人脐带源间充质干细胞可向损伤的肾小管上皮迁移,对肾组织起到保护和促进修复作用。 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     

人脐带间充质干细胞肌肉注射健康大鼠心肌组织微血管及胶原纤维的表达

BACKGROUND:To date, it is still unclear whether the intramuscular injection of heterogeneous umbilical cord mesenchymal stem cells (UC-MSC) can cause cardiac ectopic pathological angiogenesis as well as increase collagen synthesis to promote myocardial fibrosis. OBJECTIVE:To explore the effects of intramuscular injection of human UC-MSCs on myocardial micrangium and collagen expression in normal Wistar rats. METHODS:After 2 weeks of feeding, 60 male SPF Wistar rats were randomly assigned to receive intramuscular injection of PBS (normal group), DMEM (culture medium group), human UC-MSCs supernatant (supernatant group), 0.25×10⁵, 1.0×10⁵, 4.0×10⁵ human UC-MSCs (low-, moderate- and high-dose groups), respectively (n=10 per group). All the rats were subjected to second injection (same dose) at 4 weeks after first intramuscular injection. Then, the rats were killed under anesthesia at 4 weeks after second injection, to take heart tissues from the left ventricle for pathological observation, immunohistochemical examination and Masson staining. RESULTS AND CONCLUSION: No alteration of the response, activity, victualage, faeces, weight growth, and fur was found, and there was no death in rats during the experiment. All the rats had no symptoms of molt, inflammation, skin ulcer, scleroma. Strong positive expression of CD34 for the micrangium in the myocardial tissue was observed, and positive expression of the collagen in the myocardial tissue observed by Masson staining. There were no significant differences in the microvessel density and collagen expression in the myocardium among the groups (F=0.110 and 0.585, P > 0.05). To conclude, hUC-MSCs or its supernatant via intramuscular injection has no effect on the micrangium and collagen expression in normal rats.     

改良原代培养体系提高人脐带间充质干细胞的产量

背景：目前关于脐带间充质干细胞培养方法的研究很多,但尚无关于初次培养后废弃物的相关研究。 目的：探讨优化人脐带来源间充质干细胞体外培养的最佳方法。方法：采用组织块贴壁法分离培养人脐带间充质干细胞,记为初次培养组。将原代培养瓶中的培养液及组织离心,重新分成组织组、混合组和纯液组进行再次培养。观察4组原代细胞的细胞形态、获得时间和细胞得率;MTT法绘制细胞生长曲线,流式细胞仪检测细胞周期及免疫表型。结果与结论：初次培养组、再次培养组织组、再次培养混合组、再次培养纯液组获取细胞的平均时间分别为(15.00±0.45) d,(7.0±0.3) d,(8.00±0.25) d,(8.00±0.25) d。每个T75培养瓶可获取的第1代细胞数分别为(4.0±0.5)×10⁵、(9.0±0.55)×10⁵、(15.0±0.2)×10⁵、(7.0±0.33)×10⁵个。倒置显微镜下观察4组细胞为形态相对均一的梭形贴壁细胞,呈平行排列生长或漩涡状生长。4组细胞的生长曲线、增殖活性、表面标记物检测均无明显差异。结果表明对脐带间充质干细胞的原代培养体系进行再次培养,可在短时间内扩增出大量原代细胞。1库：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：     

肌肉注射脐带间充质干细胞对扩张型心肌病大鼠相关细胞因子的影响

背景：已有研究表明,在一定的剂量范围内,健康大鼠肌肉注射异种脐带间充质干细胞安全可靠,也证实了这一途径对扩张型心肌病大鼠心力衰竭同样安全有效。目的：探讨肌肉注射脐带间充质干细胞对扩张型心肌病大鼠相关细胞因子表达的影响。方法：雄性SD大鼠160只,随机抽取20只作为正常组,余大鼠通过阿霉素腹腔注射方式建立扩张型心肌病模型。造模成功大鼠随机分为模型组、上清液祖、低剂量组、中剂量组、高剂量组,分别经四肢肌肉注射人脐带间充质干细胞培养液、上清液及不同剂量的人脐带间充质干细胞,注射后观察大鼠一般情况,并于首次注射后4周再次给予相同剂量的培养液、上清液或脐带间充质干细胞。结果与结论：ELISA检测结果显示,肌注前后模型组大鼠血清肝细胞生长因子、白血病抑制因子、粒细胞集落刺激生物因子及血管内皮生长因子水平均较正常组增高(P < 0.05),肌注后低剂量组肝细胞生长因子、白血病抑制因子、血管内皮生长因子和粒细胞集落刺激生物因子较肌注前显著升高(P < 0.05),且较模型组明显升高(P < 0.05),中剂量组白血病抑制因子较肌注前明显升高(P < 0.05),高剂量组肝细胞生长因子、血管内皮生长因子和粒细胞集落刺激生物因子较肌注前无明显差异(P > 0.05)。免疫组化及RT-PCR结果均显示,各肌肉注射组大鼠心肌细胞胰岛素样生长因子1、血管内皮生长因子、肝细胞生长因子均较正常组表达增强,中剂量组呈强阳性表达,较其他各组增强明显。以上结果表明中、低剂量人脐带间充质干细胞肌肉注射可使扩张型心肌病大鼠血清肝细胞生长因子、白血病抑制因子、粒细胞集落刺激生物因子及血管内皮生长因子水平增高,并增加心肌组织胰岛素样生长因子1、肝细胞生长因子、血管内皮生长因子表达。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;组织工程全文链接：