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。     

瑞舒伐他汀联合脐血间充质干细胞移植改善急性心肌梗死后心功能

BACKGROUND:In recent years, it has been a hot topic that stem cell transplantation is used to improve cardiac insufficiency after acute myocardial infarction by inducing regeneration of cardiomyocytes in the infarction regions. OBJECTIVE:To observe the effect of rosuvastatin combined with umbilical cord blood mesenchymal stem cells transplantation on rat cardiac function after acute myocardial infarction. METHODS:Forty-five Sprague-Dawley rats were enrolled to prepare myocardial infarction models by ligaturing the left anterior descending coronary artery. Then they were equivalently divided into model group, transplantation group and combination group. At 7 days after modeling, rats in the combination group were given injection of 300 μL umbilical cord blood mesenchymal stem cells (15.0×10⁸) via the tail vein and by gavage once a day for 28 days with 1 mg/kg rosuvastatin; rats in the transplantation group and model group were injected with 300 μL umbilical cord blood mesenchymal stem cell suspension through the tail veins or the same amount of LG-DMEM medium, respectively, followed by intragastrical administration of the same amount normal saline. At 5 weeks after modeling, indexes of cardiac function, level of plasma Lp-PLA2 and heat shock protein 70 in the infarction regions were detected by color Doppler ultrasound, enzyme-linked immunosorbent assay and western blot assay, respectively. In addition, pathological changes of myocardial tissues were observed using hematoxylin-eosin staining. RESULTS AND CONCLUSION:Left ventricular ejection fraction and left ventricular end-systolic pressure were significantly higher in the combination group than in the transplantation group as well as higher in the transplantation group than the model group (P < 0.05); compared with the transplantation group, left ventricular end-diastolic pressure was significantly decreased in the combination group, but significantly increased in the model group (P < 0.05); the number of cardiomyocytes in the infarction regions was significantly higher in the combination group than the other groups. Additionally, expression of heat shock protein 70 in the infarction regions was significantly increased in the combination group (P < 0.05). To conclude, rosuvastatin combined with umbilical cord blood mesenchymal stem cell transplantation can significantly improve rat cardiac function after myocardial infarction.     

大鼠骨髓间充质干细胞移植治疗心肌梗死的实验研究

目的　研究骨髓间充质干细胞(BMSCs)移植对心肌梗死大鼠左心功能的影响以及在心肌病大鼠体内存活、分化的情况。 方法　结扎左冠状动脉前降支制备大鼠心肌梗死模型,采用同种异体大鼠BMSCs 体外分离、纯化、扩增,胶体金标记。按照对BMSCs的处理方式和心肌内注射的成分不同随机分为3组:A组接受BMSCs移植治疗;B组移植经5-氮胞苷体外诱导的BMSCs;C组列为对照组,注射等量培养基;每组12只。4周后通过血流动力学各项指标评价BMSCs移植对大鼠心功能的改善情况;免疫组织化学法检测移植细胞的存活和分化。 结果 与对照组C组相比,移植组A, B两组左心功能显著改善（P<0.01）。A, B两组之间无显著性差异。移植组左心室收缩压（LVSP）、左心室等容期压力最大变化速率（±dp/dtmax）明显高于对照组（P<0.01）,左心室舒张末期压（LVEDP）明显低于对照组（P<0.01）。移植的BMSCs能在心外膜下、梗死区及与正常心肌的交界处存活并向心肌细胞分化, 心肌特异性肌钙蛋白T（cTnT）和α－横纹肌肌动蛋白（α-sarcomeric actin）表达阳性。 结论 同种异体BMSCs移植入大鼠心肌梗死区后能明显改善心功能并向心肌细胞转化。     

脐血间充质干细胞移植与免疫调节

背景：近年研究显示,脐血间充质干细胞的自我更新和多向分化潜能为细胞移植治疗提供了基础条件,而其免疫调节功能也极大地拓展了细胞治疗的方向和范围。 目的：就近期脐血间充质干细胞的免疫调节和细胞移植研究进行回顾分析。 方法：应用计算机以“umbilical cord blood-derived mesenchymal stem cells”为关键词检索Pubmed数据库,以“脐血间充质干细胞”为关键词检索知网数据库,时间限定为2008-01/2011-06,语言种类为“English”和汉语。通过阅读标题和摘要进行初筛,排除研究内容与此文无关的文献、重复性研究及Meta分析,选择近期发表或发表在权威杂志的30篇文献进行综述。 结果与结论：脐血间充质干细胞具有与骨髓间充质干细胞相似的自我更新和多向分化潜能。通过细胞移植技术,脐血间充质干细胞在糖尿病、神经退化性疾病如阿尔茨海默病和帕金森病等以及神经损伤后的修复治疗方面显示出很强的潜力。同时,脐血间充质干细胞又具有免疫调节作用,其可通过下调T细胞的增殖,降低免疫反应。利用该特点,脐血间充质干细胞在一些免疫性疾病,如移植物抗宿主病和狼疮性肾炎等疾病的细胞治疗方面也取得了积极的进展。     

Livin基因修饰的骨髓间充质干细胞移植治疗对急性心肌梗死大鼠心功能的影响

 目的: 探讨livin修饰的骨髓间充质干细胞(MSCs)移植改善急性心肌梗死大鼠心功能的作用及livin和促凋亡蛋白caspase-3、caspase-7、caspase-9在感染后的表达情况。方法: 通过全骨髓培养法分离培养骨髓间充质干细胞,感染携带livin基因的重组腺病毒后用流式检测其对MSCs凋亡的影响。通过Western blot法分别检测livin、caspase-3、caspase-7和caspase-9的蛋白表达情况。采用冠状动脉左前降支结扎法建立心肌梗死模型,然后实验分4组进行:无胎牛血清的DMEM组;单纯干细胞治疗组(MSCs组);空载腺病毒转染干细胞组(rAd-control/MSCs)组;livin基因转染干细胞组(rAd-livin/MSCs组)。1个月后采用生理仪记录各组大鼠左室收缩压(LVSP)、左室舒张末压(LVEDP)、左室内压最大上升速率(+dp/dt_max)和左室内压最大下降速率(-dp/dt_max)来评价大鼠心功能。结果: rAd-livin/MSCs组凋亡率较MSCs组和rAd-control/MSCs组显著降低(P<0.05);rAd-livin/MSCs组抗凋亡蛋白livin明显上升(P<0.05),促凋亡蛋白caspase-3、caspase-7及caspase-9表达显著下降(P<0.05);细胞移植后1个月,rAd-livin/MSCs组心功能比MSCs组改善更明显(P<0.05)。结论: rAd-livin感染MSCs后可促进抗凋亡蛋白livin的表达,同时降低促凋亡蛋白caspase-3、caspase-7和caspase-9的表达及细胞凋亡率。rAd-livin/MSCs移植能进一步改善心肌梗死大鼠心功能。     

脐带间充质干细胞移植治疗心肌梗死大鼠心功能变化的Meta分析

文题释义： 脐带间充质干细胞：是新生儿脐带组织中的一种具有自我复制能力的多功能干细胞,因其低免疫原性和较强的增殖分化能力,目前被广泛应用于心肌梗死方面的研究。在一定条件下它可以分化成多种组织细胞,同时也可以分泌一些细胞因子,为新生细胞的生长提供良好的微环境,进而促进心肌新生,改善血供和心功能,降低死亡率。 心功能：利用超声心动图检测心功能是目前评价心肌梗死疗效的有效手段,具有无创、安全、简便、可重复检查等优势。大量实验研究表明,脐带间充质干细胞移植治疗心肌梗死可以提高心室射血分数,减少心室重构,改善心功能,降低心力衰竭的病死率。 背景：研究显示,相对于其他来源的干细胞,脐带间充质干细胞这类多功能干细胞的免疫原性较低,将其应用到心肌梗死大鼠基础研究中具有显著疗效。 目的：系统评价脐带间充质干细胞对心肌梗死大鼠心功能的影响。 方法：计算机检索PubMed、Cochrane、Embase、CBM、中国知网、万方、维普、中国期刊数据库,检索时限从建库起至2019年6月,收集关于脐带间充质干细胞治疗大鼠心肌梗死的系列研究。由2位研究者按照纳入标准独立完成文献筛选、资料提取及方法学质量评价,采用Stata14.0进行Meta分析。 结果与结论：最终9篇文献纳入研究,共计216只大鼠。Meta分析结果显示：①脐带间充质干细胞可显著升高心肌梗死大鼠的左室射血分数[95%CI (3.16,3.76),P < 0.001];②脐带间充质干细胞对心肌梗死大鼠左室短轴缩短率有显著增加作用[95%CI (0.18,0.54),P < 0.001];③脐带间充质干细胞对心肌梗死大鼠的左室舒张末期内径[95%CI (-1.90,-0.99),P=0.042]和收缩末期内径[95%CI (-6.56,-4.65),P < 0.001]有明显缩短作用;④脐带间充质干细胞可显著改善心肌梗死大鼠的左室舒张末期容积[95%CI (-2.01,-1.11),P < 0.001]和收缩末期容积[95%CI (-3.44,-2.17),P < 0.001];⑤结果表明,脐带间充质干细胞移植治疗对心肌梗死大鼠的心功能有明显改善作用,且安全性较高。受纳入文献质量的限制,以上结论需更高质量、更大样本的随机对照实验加以验证。 ORCID: 0000-0002-9025-9352(陈思宇) 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     

透明质酸水凝胶包裹骨髓间充质干细胞改善心肌梗死大鼠的心功能(Ⅲ)

背景：作者前期的研究结果显示透明质酸水凝胶包裹骨髓间充质干细胞显著改善大鼠心肌梗死后心功能。目的：探索透明质酸水凝胶及骨髓间充质干细胞促进心肌修复的分子机制。方法：分离培养雄性SD大鼠骨髓间充质干细胞,然后用透明质酸水凝胶包裹骨髓间充质干细胞在培养皿中进行体外三维培养。结扎雌性SD大鼠左冠状动脉前降支制作心肌梗死模型,1周后行超声检测,将符合条件的大鼠随机分为4组：(1)PBS组(n=12);(2)透明质酸组(n=12);(3)骨髓间充质干细胞组(n=15);(4)骨髓间充质干细胞+透明质酸组(n=15)。造模1周后将模型鼠行二次开胸,按照分组将PBS、透明质酸水凝胶、骨髓间充质干细胞、透明质酸水凝胶包裹骨髓间充质干细胞注射到梗死边缘区及梗死区。移植后1 d、1周、2周,Western blot检测梗死区域及周边的基质金属蛋白酶2、血管内皮生长因子、胸腺素β4以及c-Kit的蛋白表达水平,移植后2周免疫荧光检测移植细胞的分化情况。结果与结论：(1)在移植后1周时,骨髓间充质干细胞组的基质金属蛋白酶2及血管内皮生长因子蛋白表达水平明显高于其他3组(P <0.05);在移植后2周时,...     

体外诱导骨髓与脐血间充质干细胞向成骨细胞分化及其成骨活性的比较

背景：脐血与骨髓来源的间充质干细胞在一定诱导条件作用下均具有多向分化的能力。 目的：比较脐血与骨髓来源间充质干细胞向成骨细胞诱导分化能力的差异。 方法：采用密度梯度法分离培养人脐血间充质干细胞和骨髓间充质干细胞,当细胞汇合90%后胰蛋白酶消化传代,取第3代脐血间充质干细胞和骨髓间充质干细胞,以细胞密度为8×10⁴/孔接种,当细胞达80%融合时,加入含体积分数为10%胎牛血清、0.1 μmol/L地塞米松、50 μmol/L维生素C、10 mmol/L β-甘油磷酸钠的低糖型DMEM成骨细胞诱导液培养。 结果与结论：两种来源间充质干细胞的形态和生物学特性无明显差异,细胞表面均强表达CD44,CD29,不表达CD34;两者均具有向成骨细胞诱导分化的潜能,稳定表达了成骨细胞标志性的产物碱性磷酸酶、骨矿化结节,而且两种细胞的成骨活性差异无显著性意义。结果表明脐血和成人骨髓来源间充质干细胞向成骨细胞诱导分化能力相似,均可作为骨组织工程的种子细胞。     

脐血间充质干细胞移植对心肌细胞凋亡的影响

BACKGROUND: Umbilical cord blood mesenchymal stem cell transplantation can reduce myocardial apoptosis and myocardial fibrosis, thereby improving the cardiac function.     

肿瘤坏死因子α预处理脐血间充质干细胞移植治疗心肌梗死

文章快速阅读：文题释义： 心肌缺血：是指心脏的血液灌注减少,导致心脏的供氧减少,心肌能量代谢不正常,不能支持心脏正常工作的一种病理状态。血压降低、主动脉供血减少、冠状动脉阻塞,可直接导致心脏供血减少;心瓣膜病、血黏度变化、心肌本身病变也会使心脏供血减少,心肌缺血对心脏和全身可能带来许多危害。目前针对这种疾病治疗主要的作用机制包括：降低心肌耗氧量,提高耐缺氧能力,清除自由基、抗氧化作用,调节血栓素A 2/前列环素,调节一氧化氮细胞内皮素1、抑制肿瘤坏死因子α和白细胞介素的释放等。 脐血间充质干细胞移植：移植成功最主要的障碍为移植后只有少量脐血间充质干细胞移植至心肌内并存活,因此提高脐血间充质干细胞向心肌内迁移和定植及其存活率对治疗效果具有重要意义。移植前对脐血间充质干细胞进行肿瘤坏死因子α预处理,发现肿瘤坏死因子α预处理胎儿脐血间充质干细胞移植治疗大白兔缺血性心脏病可以改善心脏功能、减少心肌梗死面积和心肌纤维化面积。 摘要 背景：心肌缺血损伤后,心肌细胞释放大量炎症递质作为对心肌损伤的应答,梗死及缺血区的炎症因子有助于心肌组织对损伤的修复和适应。 目的：探讨肿瘤坏死因子α预处理脐血间充质干细胞移植治疗对心肌梗死兔心功能的效果。 方法：将36只大白兔随机等分为4组,假手术组、模型组、无肿瘤坏死因子α组和肿瘤坏死因子α组,后3组建立心肌梗死模型。造模后24 h,模型组、无肿瘤坏死因子α组和肿瘤坏死因子α组分别在梗死中心区及边缘注射PBS、未经肿瘤坏死因子α预处理的脐血间充质干细胞及经肿瘤坏死因子α预处理的脐血间充质干细胞。 结果与结论：与模型组相比,肿瘤坏死因子α组和无肿瘤坏死因子α组兔心脏功能明显恢复,心肌梗死面积及心肌纤维化面积明显减小;且肿瘤坏死因子α组的效果优于无肿瘤坏死因子α组。表明肿瘤坏死因子α预处理胎儿脐血间充质干细胞移植能有效治疗心肌梗死。 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 ORCID: 0000-0002-4513-3726(王巍)     

舒芬太尼联合脐血间充质干细胞移植对梗死心肌的保护作用

背景:药物预处理的延迟性保护作用成为近年来预处理领域的研究热点,舒芬太尼是一种非选择性阿片受体激动剂,有明显的心肌保护作用。目的:探讨舒芬太尼预处理联合脐血间充质干细胞移植对心肌梗死后损伤心肌的保护作用。方法:采用结扎左冠状动脉前降支的方式建立大鼠心肌缺血再灌注模型(缺血30 min,再灌注180 min),建模后随机分为缺血再灌注组,脐血间充质干细胞组,舒芬太尼+脐血间充质干细胞组,每组30只。缺血再灌注组于缺血再灌注前5 min经腹腔静脉注射1 mL生理盐水,脐血间充质干细胞组经腹腔静脉注射脐血间充质干细胞悬液1 m L,舒芬太尼+脐血间充质干细胞组在此基础上于冠脉阻断前10 min经腹腔静脉注射舒芬太尼10μg/kg,治疗后2周进行相关指标检测。结果与结论:(1)心肌梗死面积:舒芬太尼+脐血间充质干细胞组<脐血间充质干细胞组<缺血再灌注组,差异有显著性意义(P<0.05);(2)与缺血再灌注组比较,脐血间充质干细胞组血清肌酸激酶、乳酸脱氢酶及肌钙蛋白Ⅰ水平降低,一氧化氮水平增加,与脐血间充质干细胞组比较,舒芬太尼+脐血间充质干细胞组血清肌酸激酶、乳酸脱氢酶及肌钙蛋白I水平明显降低,一氧化氮水平增加更明显,差异有显著性意义(P<0.05);(3)Caspase-3蛋白表达:舒芬太尼+脐血间充质干细胞组<脐血间充质干细胞组<缺血再灌注组,差异有显著性意义(P<0.05);(4)血流动力学指标:与缺血再灌注组比较,脐血间充质干细胞组、舒芬太尼+脐血间充质干细胞组左心室舒张压升高,左心室舒张末压降低,差异有显著性意义(P<0.05);(5)与缺血再灌注组比较,脐血间充质干细胞组心肌组织病理学损伤程度减轻,舒芬太尼+脐血间充质干细胞组明显减轻;(6)结果表明,舒芬太尼预处理联合脐血间充质干细胞移植能够减轻大鼠心肌梗死程度,保护损伤的心肌。     

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.     

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.     

脐血干细胞经冠状动脉移植可降低心律失常评分及室性心律失常发生率

BACKGROUND:Until now, it is still unclear whether the stem cell transplantation triggers adverse effects on the myocardial electrical activity, resulting in the emergence of arrhythmia. OBJECTIVE:To explore the effect of intracoronary transplantation of umbilical cord blood stem cells on arrhythmia score and incidence of ventricular arrhythmia. METHODS:According to therapeutic strategies, 73 patients with coronary heart disease were assigned to receive drug therapy in control group (n=38) and umbilical cord blood stem cell transplantation in observation group (n=35). Arrhythmia score, incidence of ventricular arrhythmia and adverse reactions were recorded and analyzed before and 1, 4, 8 weeks after transplantation. RESULTS AND CONCLUSION:After treatment, arrhythmia scores were significantly reduced in the two groups, especially in the observation group, to exhibit a continuous decline trend (P < 0.05). Compared with the control group, the incidence of ventricular arrhythmia was significantly lower in the observation (P < 0.05). However, there were no significant changes in the blood pressure, heart rate and blood oxygen saturation before and after transplantation, and no acute heart failure and death occurred in the two groups. These results suggest that the intracoronary transplantation of umbilical cord blood stem cells exhibits superiorities in the treatment of coronary artery disease, significantly reducing the arrhythmia score, reducing the incidence of ventricular arrhythmia, and resulting in less adverse reactions.     

脐血间充质干细胞移植在卵巢癌化疗损伤中的作用

背景:研究证实,脐血间充质干细胞对多种损伤细胞有修复功能。目的:探讨脐血间充质干细胞移植在卵巢癌化疗性损伤中的作用。方法:健康级成年雌性Wistar大鼠60只,随机分为正常对照组,损伤组及治疗组,每组20只。对照组不做任何处理,损伤组及治疗组建立大鼠卵巢癌化疗性损伤模型。模型成功后对照组尾静脉注射生理盐水,损伤组注射紫杉醇,治疗组在损伤组基础上给予脐血间充质干细胞移植。移植后2周,应用RT-PCR检测卵巢癌组织XAF1、Survivin mR NA的表达,Western blot检测卵巢癌组织中XAF1、Survivin蛋白的表达,TUNEL法检测卵巢癌细胞凋亡情况。结果与结论:(1)与损伤组比较,治疗组肿瘤组织XAF1 mR NA和蛋白表达显著上调,凋亡抑制蛋白Survivin mR NA和蛋白表达显著下调(P<0.05);(2)损伤组卵巢组织结构较对照组明显破坏,有大面积的出血坏死区域,治疗组损伤程度较损伤组明显减轻;(3)与损伤组比较,治疗组卵巢癌细胞凋亡率明显升高(P<0.05);(4)结果表明,脐血间充质干细胞移植可以促进卵巢癌化疗性损伤大鼠卵巢组织的修复,XAF1、Survivin在肿瘤新生血管形成及卵巢癌细胞凋亡过程中发挥了作用。     

舒芬太尼复合丙泊酚全身麻醉在脐血间充质干细胞移植治疗脊髓损伤中的应用

BACKGROUND:Sufentanil and propofol are both found to have good neuroprotective effects on neurological damage in clinical practice. OBJECTIVE:To investigate the effect of propofol combined with sufentanil in umbilical cord blood mesenchymal stem cells transplantation for the treatment of spinal cord injury. METHODS:Sixty-five Wistar rats were selected to make animal models of acute spinal cord injury using Allen’s method. Six hours after modeling, these rats were randomly assigned into combined group (injection of 2×10⁷/L human umbilical cord blood mesenchymal stem cell suspension (0.5 mL) plus injection of 1.0-1.5 mg/kg propofol and 0.5 μg/kg sufentanil via the tail vein), stem cell group (injection of 2×10⁷/L human umbilical cord blood mesenchymal stem cell suspension (0.5 mL) via the tail vein), or control group (injection of 30 μL of LDMEM containing 5% fetal bovine serum). S100β protein level in serum was detected in each group at 15 and 60 minutes after injection. Motor function of rat in each group was assessed by Basso Beattie Bresnahan (BBB) scoring and incline plane test at 1, 2, 4, 6, 8 weeks after modeling. Pathological changes of the spinal cord were observed at 4 weeks after modeling. Expression of vascular endothelial growth factor was detected using western blot assay at 1 and 2 weeks after modeling. RESULTS AND CONCLUSION:After 15 and 60 minutes of intervention, S100β protein level was lowest in the combined group followed by the stem cell and control groups (P < 0.05). At 2, 4, 6, 8 weeks after modeling, scores on the incline plane test and BBB were ranked as follows: combined group > stem cell group > model group (P < 0.05). At 4 weeks after modeling, severe damage to the spinal cord and few nerve fibers were found in the control group; spinal cord hyperplasia and a few of regenerated axons and PKH-26-positive stem cells appeared in the stem cell group; while in the combined group, there were a large amount of PKH-26-positive stem cells and nerve axon-like structures. At 1 and 2 weeks after modeling, the highest protein level of vascular endothelial growth factor was found in the combined group followed by the stem cell group and control group (P < 0.05). To conclude, these findings indicate that propofol and sufentanil in umbilical cord blood mesenchymal stem cell transplantation therapy can promote the recovery of hindlimb function after spinal cord injury, thereby promoting the functional recovery of rats from spinal cord injury.