督脉电针与神经干细胞移植联合应用促进全横断脊髓损伤组织产生内源性神经生长活性物质的研究

我们先前的研究发现,督脉电针与神经干细胞(NSCs)移植联合应用能够促进全横断损伤脊髓的结构和部分功能修复。但不清楚这是否通过督脉电针促进受损伤脊髓组织产生一些内源性神经生长活性物质,参与全横断损伤脊髓的结构和部分功能修复。为此,本研究检测督脉电针 神经干细胞移植组(电针NSCs组)、督脉电针组(电针组)、神经干细胞移植组(NSCs组)和实验对照组(对照组)共4组40只成年大鼠全横断损伤脊髓组织内的环磷酸腺苷(cAMP)、神经营养素-3(NT-3)、神经营养因子受体——Trk以及神经生长相关蛋白(GAP-43)的水平。     

督脉电针与神经干细胞移植联合应用促进脊髓全横断大鼠受损伤的神经元存活及其轴突再生

目的探讨督脉电针与神经干细胞移植联合应用对脊髓全横断大鼠受损伤的神经元存活及其轴突再生的影响。方法将对照组、神经干细胞移植组、督脉电针组和督脉电针＋神经干细胞移植组的成年大鼠胸10脊髓段做全横断损伤;其中神经干细胞移植组和电针神经干细胞组在损伤处移植神经干细胞。电针组和电针神经干细胞移植组在术后开始接受督脉电针治疗。所有动物存活67d。结果1．电针神经干细胞移植组脊髓损伤处的去甲肾上腺素能、5-羟色胺受体、降钙素基因相关肽能和生长相关蛋白-43阳性染色的4种神经纤维均明显多于其他几组。2．电镜下可观察到脊髓横断处有再生的神经纤维穿越,在电针神经干细胞移植组尤为明显。3．大脑体感运动区皮质和中脑红核受损伤的神经元存活数量也多于其他几组,一些神经元的再生神经纤维可能穿越横断处,进入尾端脊髓组织。结论督脉电针与神经干细胞移植联合应用能促进脊髓全横断大鼠受损伤的神经元存活及其轴突再生。     

督脉电针与神经干细胞移植联合应用促进脊髓全横断大鼠后肢运动功能的恢复

为探讨督脉电针与神经干细胞移植联合应用对脊髓全横断大鼠后肢运动功能恢复的影响，将20只成年SD大鼠分为4组，即对照组、神经干细胞移植组(神经干细胞组)、督脉电针组(电针组)和督脉电针 神经干细胞移植组(电针神经干细胞组)。4组运动均在胸10脊髓段作全横断手术，并用明胶海棉填充断口，其中神经干细胞组和电针神经干细胞组     

督脉电针与神经干细胞移植联合应用促进大鼠受损伤脊髓组织产生神经生长活性物质

目的探讨督脉电针与神经干细胞移植联合应用能否促进受损伤脊髓组织产生神经生长活性物质。方法成年大鼠分为正常组、对照组、神经干细胞移植组（NSCs组）、督脉电针组（电针组）和督脉电针＋神经干细胞移植组（电针NSCs组）。除正常组外均实施T10段脊髓全横断手术,其中电针组和电针NSCs组于术后5d进行电针治疗。分别于术后14d和28d取材,进行受损伤脊髓组织环-磷酸腺苷（cAMP）含量的放射免疫检测;用Westen blottlng检测神经营养素-3（NT-3）、神经营养因子受体（Trk）以及生长相关蛋白-43（GAP-43）的水平。结果 1．在术后14d,NSCs组、电针组和电针NSCs组的脊髓损伤区cAMP含量较正常组有增加。但除电针组外,脊髓损伤区的上段或下段组织cAMP含量低于正常组。在术后28d,电针NSCs组脊髓损伤区上段、下段组织cAMP含量仍保持较高水平。NSCs组和电针NSCs组的脊髓损伤区cAMP含量较正常组有所增加。2．NT-3、Trk及GAP-43的表达以电针组和电针NSCs组较为明显,对照组和NSCs组的3种蛋白表达均低于电针组和电针NSCs组。结论督脉电针能促进受损伤的脊髓组织产生cAMP;督脉电针与NSCs移植联合应用能保持受损伤的脊髓组织较高水平的cAMP,而且NT-3、Trk及GAP-43的含量也有增高的趋势。     

督脉电针联合神经干细胞移植治疗脊髓全横断损伤后aggrecan的表达变化

目的:观察督脉电针联合神经干细胞( NSCs)移植治疗脊髓损伤对硫酸软骨素蛋白多糖aggrecan的表达影响.方法:成年SD大鼠随机分为脊髓损伤对照组、督脉电针组、NSCs移植组以及督脉电针联合NSCs移植组.建立成年大鼠第9～10胸椎段脊髓全横断模型.其中电针组和电针联合NSCs组于术后当天进行电针治疗.用免疫组织化...     

督脉电针对移植在大鼠脊髓全横断损伤处的神经干细胞存活分化和迁移的影响

目的探讨督脉电针对脊髓全横断损伤处移植的神经干细胞存活、分化和迁移的影响。方法将20只成年SD大鼠分为神经干细胞移植14d组（NSCs14d组）、督脉电针＋神经干细胞移植14d组（电针NSCs14d组）、神经干细胞移植30d组（NSCs30d组）和督脉电针＋神经干细胞移植30d组（电针NSCs30d组）4组。所有动物均实施T10段脊髓全横断手术,其中电针组和电针NSCs组于术后5d进行电针治疗。分别于术后14d和30d取材检测移植在脊髓损伤处的神经干细胞存活、分化和迁移情况。结果1．电针NSCs14d组或电针NSCs30d组移植的神经干细胞存活数量均多于NSCs14d组或NSCs30d组,但是电针NSCs30d组或NSCs30d组移植的神经干细胞存活数量均少于电针NSCs14d组或NSCs14d组。2．电针NSCs30d组和NSCs30d组的脊髓全横断损伤处及其相邻的组织均有少量移植的神经干细胞呈现微管相关蛋白2（MAP2）阳性染色。3．电针NSCs30d组和NSCs30d组的脊髓全横断损伤处及其相邻的组织均可观察到较多移植的神经干细胞呈现胶质原纤维酸性蛋白（GFAP）阳性染色。4．在电针NSCs14d组或电针NSCs30d组,移植的神经干细胞向脊髓损伤处尾端组织迁移的距离明显长于NSCs14d组或NSCs30d组。结论督脉电针能够促进大鼠脊髓全横断损伤处移植的神经干细胞存活,这些细胞能分化为MAP2或GFAP阳性细胞;督脉电针对移植在脊髓损伤处的神经干细胞向宿主脊髓组织迁移方向有一定的影响。     

督脉电针与神经干细胞移植对脊髓全横断大鼠后肢功能恢复的影响

目的探讨督脉电针与神经干细胞移植联合应用对脊髓全横断大鼠后肢运动功能恢复的影响。方法将对照组、神经干细胞移植组(神经干细胞组)、督脉电针组(电针组)和督脉电针 神经干细胞移植组(电针神经干细胞组)大鼠胸10脊髓段做全横断损伤；其中神经干细胞组和电针神经干细胞组在损伤处移植神经干细胞。电针组和电针神经干细胞组在术后开始接受电针治疗。结果1．对照组大鼠后肢完全瘫痪。其余各组均能观察到大鼠后肢的运动。电针神经干细胞组BBB分数高于其他组。2．对照组大鼠后肢不能爬行网格。神经干细胞组2只、电针组3只和电针神经干细胞组5只大鼠能通过爬行网格攀上平台。3．脊髓损伤后，对照组的皮质体感诱发电位或皮质运动诱发电位的潜伏期增长和峰峰值变小。经电针治疗后，电针神经干细胞组的潜伏期和峰峰值均较电针组和神经干细胞组有明显的改善。4．对照组的后肢肌肉发生明显的萎缩，而电针组和电针神经干细胞组的后肢肌肉萎缩较轻。结论督脉电针与神经干细胞移植联合应用能促进脊髓全横断大鼠后肢运动功能的恢复。     

嗅鞘细胞移植联合督脉电针治疗大鼠前脊髓综合征

背景：电针在脊髓损伤的康复过程中有其一定的临床作用,同时以嗅鞘细胞为代表的细胞治疗在部分患者的康复过程中亦起到了一定的作用,两者是否具有协同应用尚不清楚。 目的：观察督脉电针联合嗅鞘细胞移植对前脊髓综合征大鼠神经营养因子3水平及P75NTR表达的影响。 方法：将40只成年大鼠随机分为对照组、督脉电针组、嗅鞘细胞移植组、督脉电针+嗅鞘细胞移植组,经嗅鞘细胞移植和督脉电针治疗2周后 ELISA法检测脊髓组织神经营养因子3水平,免疫组化检测P75NTR的表达。 结果与结论：督脉电针+嗅鞘细胞移植组神经营养因子3水平较对照组及其他实验组高(P < 0.05);嗅鞘细胞移植组和督脉电针+嗅鞘细胞移植组的脊髓损伤部位以及相邻的组织内均有P75NTR表达,且督脉电针+嗅鞘细胞移植组阳性表达明显较嗅鞘细胞移植组多。实验证实督脉电针联合嗅鞘细胞移植能够明显增高大鼠前脊髓综合征邻近组织的神经营养因子3水平;督脉电针可以有效促进移植的嗅鞘细胞在宿主内存活。     

脐血干细胞移植联合电针治疗促进脊髓损伤神经功能恢复

目的:观察脐血干细胞移植联合督脉电针治疗对脊髓全横断损伤大鼠神经功能的恢复作用。方法:建立SD大鼠胸段脊髓完全横断模型,随机分为损伤模型组、脐血干细胞移植组(脐血组)、督脉电针治疗组(电针组)和脐血干细胞移植联合督脉电针治疗组(联合组);梯度离心法分离人脐血单个核细胞,尾静脉注射移植;取大椎、命门二穴,电针治疗。应用Basso-Beattie-Bresnahan(BBB)评分评价各组大鼠后肢功能的恢复情况;各组分别于7、14和28 d 3个时间点检测大脑皮层运动诱发电位;电镜观察脊髓髓鞘修复及再生情况。结果:各组脊髓神经功能均有不同程度恢复。联合组动物后肢功能恢复显著,BBB评分与其他3组比较差异存在;联合组皮层运动诱发电位的潜伏期缩短、波幅增高,与其他3组比较差异存在。电镜观察,联合组髓鞘松散程度明显减轻,结构规整,线粒体肿胀减轻,薄髓的再生纤维明显增多。结论:脐血干细胞移植联合督脉电针治疗对脊髓损伤的功能恢复有促进作用。     

骨髓间充质干细胞尾静脉移植脊髓损伤大鼠脑源性神经营养因子及神经生长因子的表达

背景：骨髓间充质干细胞移植对脊髓损伤有治疗作用,但其机制尚不完全清楚。 目的：应用免疫组织化学方法观察骨髓间充质干细胞静脉移植损伤脊髓局部脑源性神经营养因子及神经生长因子的表达,分析骨髓间充质干细胞移植治疗大鼠脊髓损伤的作用途径。 方法：运用改良Allen法制备T10脊髓外伤性截瘫大鼠模型,假手术组6只,脊髓损伤组24只随机分为对照组和骨髓间充质干细胞移植组。骨髓间充质干细胞移植组、假手术组接受骨髓间充质干细胞单细胞悬液1 mL(1×10⁶ cells)自大鼠尾静脉缓慢注射移植,对照组静脉注射PBS 1 mL。 结果与结论：脊髓损伤后损伤局部的脑源性神经营养因子、神经生长因子表达增加,骨髓间充质干细胞静脉注射移植后能促进脊髓损伤局部脑源性神经营养因子、神经生长因子更进一步的表达,这可能是促进神经结构及神经功能恢复的因素之一。     

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.     

电针刺激对神经干细胞移植治疗脊髓损伤大鼠后肢功能的影响

背景：单纯的神经干细胞移植对受损脊髓组织的修复作用并不理想,为了进一步提高移植细胞在体内的存活、增殖及定向分化为神经元的比例,必须进一步改善脊髓损伤区的微环境。 目的：观察神经干细胞移植联合电针刺激对脊髓损伤大鼠后肢功能及电生理的影响。 方法：将脊髓损伤模型SD大鼠72只按随机数字表法分为4组：对照组尾静脉注入培养液,神经干细胞组经尾静脉注入等体积神经干细胞悬液,电针刺激组自模型完成6 h起采用督脉加体穴电针1周,联合组尾静脉注射神经干细胞后,同时采用督脉加体穴电针1周。分别于造模前、造模后1,3 d、1-4 周通过BBB评分、斜板试验进行运动功能评定。造模后4周取材行病理切片苏木精-伊红染色,荧光显微镜观测CM-Dil 标记的神经干细胞存活及分布情况,辣根过氧化物酶示踪观察神经纤维再生情况,运动诱发电位和体感诱发电位观察大鼠神经电生理恢复情况。 结果与结论：造模后2-4周大鼠下肢运动功能评价联合组优于神经干细胞组及电针刺激组,神经干细胞组和电针刺激组优于对照组。造模后4周,神经干细胞组和电针刺激组损伤区可见少量神经轴索样结构,脊髓空洞较小,联合组可见较多神经轴索样结构,未见脊髓空洞。造模后4周,CM-Dil 阳性细胞和辣根过氧化物酶阳性神经纤维数：联合组>神经干细胞组与电针刺激组>对照组,各组之间差异有显著性意义(P < 0.05)。运动诱发电位和体感诱发电位的潜伏期：联合组<神经干细胞组与电针刺激组<对照组,各组之间差异有显著性意义(P < 0.05);运动诱发电位和体感诱发电位的波幅：联合组>神经干细胞组与电针刺激组>对照组,各组之间差异有显著性意义(P < 0.05)。结果提示神经干细胞移植的同时联合电针刺激能够促进脊髓损伤大鼠神经突触的再生,改善其大鼠肢体运动功能及电生理功能。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      

乌司他丁联合脐带间充质干细胞移植脊髓损伤大鼠后肢运动功能和 运动诱发电位的变化

背景：乌司他丁能减轻炎性反应、清除氧自由基,对中枢神经系统损伤具有保护作用,能有效地提高脊髓损伤后移植细胞的存活率。 目的：观察乌司他丁联合脐带间充质干细胞移植对脊髓损伤大鼠后肢功能的影响。 方法：Wistar大鼠建立脊髓损伤动物模型后随机分成4组：空白对照组尾静脉注射培养液+腹腔注射生理盐水,细胞移植组尾静脉注射脐带间充质干细胞,乌司他丁组腹腔注入乌司他丁,联合组尾静脉注射脐带间充质干细胞,同时腹腔注入乌司他丁。 结果与结论：移植4周后联合组下肢运动功能优于细胞移植组和乌司他丁组(P < 0.05),细胞移植组和乌司他丁组优于空白对照组(P < 0.05)。移植后4周,PKH26标记的阳性细胞数联合移植组多于细胞移植组,细胞移植组多于乌司他丁组和空白对照组(P < 0.01)。移植后8周,联合组大鼠体感诱发电位及运动诱发电位的潜伏期、波幅明显优于其他3组(P < 0.05或P < 0.01)。提示乌司他丁联合应用脐带间充质干细胞移植可促进脊髓损伤大鼠神经突触的再生,改善其肢体运动功能和电生理功能,其效果优于单独应用乌司他丁或脐带间充质干细胞。     

脐血干细胞联合神经生长因子和物理康复治疗小儿脑性瘫痪

背景：干细胞局部移植可治疗神经系统疾病。 目的：观察脐血干细胞移植联合使用鼠神经生长因子及物理康复治疗小儿脑性瘫痪的临床效果。 方法：将90例小儿脑性瘫痪患儿根据是否接受干细胞治疗分为3组：脐血干细胞治疗组采用脐血干细胞+鼠神经生长因子+物理康复治疗,常规治疗组采用鼠神经生长因子+物理康复治疗,对照组未行有效治疗。 结果与结论：3组患儿入组前粗大运动功能测试量表各能区分值差异无显著性意义(P > 0.05)。治疗后3个月,脐血干细胞治疗组及常规治疗组粗大运动功能测试量表各能区中A、B、D能区分值较治疗前提高(P < 0.05),且脐血干细胞治疗组A、B能区分值均明显高于常规治疗组(P < 0.05),对照组粗大运动功能测试量表各能区分值无变化(P > 0.05)。表明脐血干细胞移植联合使用鼠神经生长因子、物理康复治疗治疗小儿脑瘫疗效优于鼠神经生长因子联合物理康复疗法。     

脐血干细胞移植与神经生长因子联合治疗小儿脑性瘫痪的安全性分析

背景：脐血干细胞移植联合神经生长因子治疗小儿脑性瘫痪是临床研究热点。 目的：分析脐血干细胞移植联合神经生长因子治疗小儿脑性瘫痪疗效及安全性。 方法：选取天津红桥医院儿科2011年11月至2013年2月收治的脑性瘫痪患儿80例,按治疗方法分别分为试验组(n=40)和对照组(n=40),分别接受脐血干细胞移植与神经生长因子联合治疗和单独神经生长因子治疗。 结果与结论：与治疗前相比,2组患儿治疗后脑性瘫痪综合功能评定表及粗大运动功能测量量表分值均有所提高(P < 0.05),且白细胞计数、中性粒细胞分数、总胆红素、丙氨酸氨基转移酶、天冬氨酸氨基转移酶明显升高(P < 0.05),且试验组患儿的治疗效果优于对照组(P < 0.05)。所有患儿未见严重不良反应。说明脐血干细胞移植联合神经生长因子治疗小儿重症脑性瘫痪疗效显著,安全性高。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：     

不同时期局部移植人脐带间充质干细胞修复脊髓损伤的组织学观察

BACKGROUND:Spinal cord injury (SCI) is a disease causing a variety of motor and sensory dysfunctions, abnormal muscle tone and pathological reflex. Clinically, human umbilical cord mesenchymal stem cell transplantation has become an employed therapy for SCI. OBJECTIVE:To investigate the effect of local transplantation of human umbilical cord mesenchymal stem cells in different time after spinal cord injury in rats. METHODS:100 SPF male adult Sprague-Dawley rats were randomly divided into five groups: blank control group, SCI group, post-SCI 3-, 7-, 21-day transplantation groups (n=20 per group). Animal models of T₁₀ SCI were made by Allen’s method in the latter four groups, and rats in the three transplantation groups were given HUCMSCs transplantation at 3, 7, 21 days after SCI, respectively. RESULTS AND CONCLUSION:Compared with the SCI group, improved motor function scores, decreased interleukin-2 level, and increased serum interleukin-10 level were observed in the three transplantation groups at 49 days after modeling, indicating SCI was improved significantly in the three transplantation groups, especially in the post-SCI 7-day transplantation group. These findings suggest that human umbilical cord mesenchymal stem cell transplantation for SCI repair improves the movement function of rats, and cell transplantation at 7 days after modeling has achieved best outcomes.     

依达拉奉联合神经干细胞移植修复大鼠脊髓损伤

背景：依达拉奉是一种自由基清除药,可以减轻受损神经组织水肿和改善脊髓损伤区微环境。 目的：观察依达拉奉联合神经干细胞移植对大鼠脊髓全横断损伤的修复效果。 方法：成年雌性SD大鼠80只,建立胸9脊髓全横断损伤模型,随机分为4组：对照组不做处理;依达拉奉组脊髓损伤后6 h经尾静脉注射依达拉奉;神经干细胞移植组脊髓损伤后6 h脊髓损伤区域注入神经干细胞悬液;依达拉奉+细胞移植组脊髓损伤后6 h神经干细胞移植的同时尾静脉注射依达拉奉。 结果与结论：造模后8周可观察到PKH-26标记的神经干细胞在体内存活并在脊髓内迁移;细胞移植组和依达拉奉联+细胞移植组可见少量连续性神经纤维通过损伤区。荧光金逆行脊髓追踪显示神经干细胞移植组和依达拉奉+细胞移植组可见被荧光金标记的神经锥体细胞穿越损伤区。PKH-26标记的阳性细胞数及荧光金阳性神经纤维数：依达拉奉+细胞移植组最多,依达拉奉组、神经干细胞移植组次之,对照组最少,各组之间差异有显著性意义(P < 0.05);后肢功能运动BBB评分依次为依达拉奉+细胞移植组>神经干细胞移植组>依达拉奉组>对照组。提示依达拉奉能促进神经干细胞在损伤区的存活并向神经细胞分化,依达拉奉联合神经干细胞移植有促进细胞移植修复大鼠脊髓损伤的效果。     

盐酸川芎嗪联合骨髓间充质干细胞移植对脊髓损伤模型大鼠的神经保护

BACKGROUND: Ligustrazine hydrochloride which promotes nerve repair can be applied to the treatment of nervous system injury. OBJECTIVE: To investigate the effect of ligustrazine hydrochloride combined with bone marrow mesenchymal stem cells transplantation on electrophysiological property and hindlimb function of rats with spinal cord injury. METHODS: T9 spinal cord transection injury models were made in rats using Allen’s method, and then rat models were randomized into three groups: rats in control group received tail vein injection of culture solution; rats in cell transplantation group underwent bone marrow mesenchymal stem cell transplantation via the tail vein; rats in combined group were subjected to the tail vein injection of ligustrazine hydrochloride and bone marrow mesenchymal stem cells that lasted for 4 hours. At 1, 2, 4, 6, 8 weeks after modeling, Basso, Beattie and Bresnahan scores and modified Tarlov scores were used to detect the motor function of rats. At 72 hours after modeling, RT-PCR method was used to detect the expression of Bcl-2 and basic fibroblast growth factor around the injured region. At 4 weeks after modeling, somatosensory and motor evoked potentials were measured for evaluation of neurophysiological recovery. At 8 weeks after modeling, horseradish peroxidase tracer was used to assess the regeneration of rat spinal cord nerve fibers; PKH-26 labeling was used to observe the survival and migration of transplanted cells. RESULTS AND CONCLUSION: At 1, 2, 4, 6, 8 weeks after modeling, Basso, Beattie and Bresnahan scores and modified Tarlov scores were significantly higher in the combined group than the cell transplantation followed by the control group (P < 0.05). At 72 hours after modeling, the expression of Bcl-2 and basic fibroblast growth factor around the injured region was significantly higher in the combined group than the cell transplantation group and control group (P < 0.05). At 4 weeks after modeling, the latencies of somatosensory and motor evoked potentials were ranked as follows: combined group < cell transplantation group < control group (P < 0.05); the amplitudes of somatosensory and motor evoked potentials were ranked as follows: combined group > cell transplantation group > control group (P < 0.05). At 8 weeks after modeling, horseradish peroxidase-labeled pyramidal cells in the cell transplantation group and combined group showed apparent crossing signs; the number of PKH-26-positive cells and horseradish peroxidase-positive cells was the most in the combined group followed by the cell transplantation group, and was the least in the control group (P < 0.05). These findings indicate that ligustrazine hydrochloride combined with bone marrow mesenchymal stem cells transplantation can facilitate nerve cell regeneration, promote the expression of Bcl-2 and basic fibroblast growth factor, and improve motor function in rats after spinal cord injury.      

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。     

胰岛素样生长因子1诱导骨髓间充质干细胞转化为少突胶质细胞移植修复急性脊髓损伤

BACKGROUND:Treatment and rehabilitation of spinal cord injury is a complicated problem, and the reconstruction and remyelination of neural reflex pathways are the essential process, during which oligodendrocytes play an important role in spinal cord injury repair. OBJECTIVE:To observe the effect of oligodendrocyte transplantation for acute spinal cord injury in rats. METHODS:Insulin-like growth factor 1 induced bone marrow mesenchymal stem cells differentiating into oligodendrocytes, and those oligodendrocytes were transplanted into rats with acute spinal cord injury as induced cell transplantation group. Simple normal saline and natural oligodendrocytes were transplanted into the rat injured spinal cord as control group and oligodendrocyte group, respectively. Rat behavioral changes were observed by inclined plane test and Basso-Beattie-Bresnahan (BBB) scores. Neurological recovery and survival of the transplanted cells was detected and observed using spinal evoked potential and immunohistochemical staining, respectively. RESULTS AND CONCLUSION:Compared with the control group, BBB scores and the critical elevation angle of the incline plane test significantly increased, latencies of spinal motor and sensory evoked potential were on the decline (P < 0.05), and there were no significant differences in above indicators between the two groups at 4 and 8 weeks after transplantation. Moreover, survived oligodendrocytes after transplantation could be found in the lesions of spinal cord in both two groups. In conclusion, insulin-like growth factor 1-induced bone marrow mesenchymal stem cells can differentiate into oligodendrocytes that exact an excellent role in acute spinal cord injury repair after transplantation, which achieve the equal clinical efficacy to the natural oligodendrocytes.