电刺激与运动联合干预绝经后骨质疏松模型大鼠骨代谢及血清学指标的改变

背景：电刺激与运动皆能对去势大鼠骨代谢产生良好影响,但关于电刺激和运动联合干预去势大鼠至今少有报道。 目的：观察适宜健骨运动处方与电刺激联合干预对绝经后骨质疏松的影响。 方法：将大鼠随机分为假手术组,骨质疏松模型组,运动组,电刺激组和运动+电刺激组,后4组建立骨质疏松大鼠模型并进行相应的干预。 结果与结论：干预后60 d,与骨质疏松模型组比较,运动结合电刺激组骨钙素浓度增高(P < 0.05),运动组、电刺激组、运动结合电刺激组抗酒石酸盐酸性磷酸酶活性低(P < 0.01),雌二醇水平显著升高(P < 0.05)。结果证实,运动处方结合低频电刺激联合作用能够更好地促进骨质疏松模型大鼠骨形成和抑制骨吸收,减少破骨细胞分泌和阻止骨丢失。 关键词：电刺激;运动;骨质疏松;骨代谢;骨组织构建 doi:10.3969/j.issn.1673-8225.2012.07.004     

局部应用神经生长因子对周围神经损伤后骨折早期愈合的影响

背景：骨折愈合机制复杂,受到多种因素的影响,骨折延迟愈合、不愈合时有发生,如何促进骨折愈合成为亟待解决的问题。 目的：观察周围神经损伤后局部应用神经生长因子对骨折早期愈合的影响。 方法：36只健康雄性Wistar大白鼠建立胫骨骨折模型,将其随机分为4组,每组18个肢体。①骨折+盐水组为胫骨骨折予以双侧腓肠肌生理盐水注射。②骨折伴神经损伤+盐水组胫骨骨折伴神经损伤予以生理盐水注射。③骨折+神经生长因子组为胫骨骨折予以局部注射神经生长因子。④骨折伴神经损伤+神经生长因子组为神经损伤、胫骨骨折予以局部注射神经生长因子。对各组骨痂计量学结果等情况进行观察对比。 结果与结论：①骨痂量：干预4周时与骨折+盐水组、骨折+神经生长因子组、骨折伴神经损伤+神经生长因子组比较,骨折伴神经损伤+盐水组骨痂量最多,其他3组比较差异无显著性意义(P > 0.05)。②骨计量指标：干预2周时,骨折伴神经损伤+盐水组骨吸收表面积明显大于骨折伴神经损伤+神经生长因子组(P < 0.05),骨折+盐水组破骨细胞指数明显大于骨折+神经生长因子组(P < 0.05);干预4周时,矿化骨小梁宽度,骨折+盐水组明显小于骨折+神经生长因子组(P < 0.05),骨折伴神经损伤+盐水组明显小于骨折伴神经损伤+神经生长因子组(P < 0.05)。结果提示周围神经损伤后的骨折局部应用神经生长因子均可增强成骨能力,且可有效抑制破骨细胞活动,促进骨折早期愈合。 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程全文链接：     

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。     

去卵巢牙周炎模型大鼠牙槽骨吸收与补骨脂的干预

背景：补骨脂在治疗骨质疏松症方面有明显效果。 目的：观察补骨脂对去卵巢牙周炎大鼠牙槽骨代谢、牙槽骨密度及高度的影响。 方法：将30只雌性Wistar大鼠随机等分为3组：去卵巢组和补骨脂组行双侧卵巢切除术,假手术组仅手术不切除卵巢,补骨脂组于卵巢切除第2天灌胃3 g/kg补骨脂水剂,1次/d。去卵巢2周,所有大鼠采用结扎上颌磨牙的方法建立牙周炎模型。 结果与结论：上颌磨牙结扎12周,与假手术组比较,去卵巢组大鼠血清雌二醇、钙离子浓度显著降低(P < 0.05),碱性磷酸酶水平显著升高(P < 0.05),X射线片及苏木精-伊红染色显示去卵巢组大鼠上颌骨骨密度及高度显著降低(P < 0.05);与去卵巢组比较,补骨脂组大鼠血清钙离子浓度显著升高(P < 0.05),碱性磷酸酶水平显著降低(P < 0.05),上颌骨骨密度及高度显著增高(P < 0.05),且与假手术组比较差异无显著性意义(P > 0.05)。说明雌激素缺乏促进实验性牙周炎大鼠牙槽骨吸收,补骨脂可有效阻止雌激素降低导致的牙槽骨高度、骨密度降低。     

镓盐对骨质疏松症大鼠骨组织中羟基磷灰石及胶原含量的影响

背景：硝酸镓是近10多年来发现的一种能降低骨转换的药物。 目的：观察硝酸镓对骨质疏松大鼠骨羟基磷灰石及胶原含量的影响。 方法：实验分为3组。正常组大鼠开腹切除1小块脂肪,其余大鼠切除双侧卵巢制作大鼠骨质疏松症动物模型。正常组及骨质疏松组腹腔注射生理盐水,硝酸镓组腹腔注射硝酸镓,3次/周,常规饲料喂养12周后取大鼠双侧股骨。 结果与结论：骨质疏松组大鼠骨组织中羟基磷灰石含量明显高于正常组(P < 0.05);硝酸镓组与正常组相比有升高趋势(P > 0.05),与骨质疏松组间差异无显著性意义(P > 0.05),骨质疏松组骨中胶原较正常组及硝酸镓组明显降低(P < 0.05)。结果表明,发生骨质疏松时骨中胶原含量明显降低,羟基磷灰石含量有升高趋势,硝酸镓可以抑制这一过程。     

胆囊收缩素促坐骨神经再生的可能机制

背景：前期实验发现,八肽胆囊收缩素能促进大鼠坐骨神经损伤后的再生,但具体机制仍不清楚。目的：筛选有效指标,尝试从神经生长因子及神经再生微环境的角度分析八肽胆囊收缩素促进大鼠坐骨神经再生的机制。方法：选择健康SD大鼠,制备坐骨神经单侧离断伤模型后随机分为2组,八肽胆囊收缩素治疗组造模后连续7 d腹腔注射八肽胆囊收缩素8 nmol/kg,对照组腹腔注射等量生理盐水。检测两组大鼠局部神经生长因子蛋白表达、脊髓诱导型一氧化氮合酶水平、血清超氧化物歧化酶活性和丙二醛浓度,同时检测脊髓凋亡细胞数。结果与结论：八肽胆囊收缩素治疗组大鼠局部神经生长因子蛋白表达高于对照组(P < 0.01),脊髓诱导型一氧化氮合酶和凋亡细胞数低于对照组(P < 0.01),血清超氧化物歧化酶活性高于对照组且丙二醛浓度低于对照组(P < 0.01,0.05)。说明胆囊收缩素促进坐骨神经再生的可能机制包括保护神经元、抗细胞凋亡、抑制炎性反应、抗NO及氧化反应、抗丙二醛减轻自由基损伤等方面外,还可刺激神经生长因子的表达和释放。 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程全文链接：     

大豆异黄酮干预去势大鼠骨密度及成骨细胞雌激素受体α的表达

背景：大豆异黄酮是一类植物雌激素,对绝经后骨质疏松症治疗具有重要意义。 目的：进一步验证大豆异黄酮对去势大鼠骨密度和成骨细胞雌激素受体α表达的影响。 方法：将12月龄去势雌性SD大鼠随机分为3组,大豆异黄酮组和对照组大鼠摘除双侧卵巢,假手术组只进行手术入路,不切除卵巢。大豆异黄酮组切除卵巢后,每日灌胃大豆异黄酮,连续40 d。对照组喂等量生理盐水。 结果与结论：喂饲40 d后对照组大鼠左侧股骨骨密度值显著低于假手术组(P < 0.05),提示骨质疏松模型成功。大豆异黄酮组大鼠左侧股骨骨密度高于对照组(P < 0.05);大豆异黄酮组雌激素受体α的表达量高于对照组(P < 0.05)。提示大豆异黄酮可增加去势大鼠骨密度,提高去势大鼠成骨细胞雌激素受体α的表达,促进成骨细胞增殖。     

建立脊髓横断模型大鼠的系统评价

背景：建立一种成功率较高、安全可靠的标准脊髓横断模型是研究脊髓修复的前提条件。目的：评价大鼠脊髓横断模型制备的价值及椎板切除对脊髓的影响。方法：检索美国国立医学图书馆(PubMed)、中国知网(CNKI)、重庆维普(VIP)、万方数据库中所用关于大鼠脊髓横断模型的随机对照研究。结果与结论：11篇随机对照研究符合纳入标准(英文2篇,中文9篇),共394只大鼠纳入研究,脊髓半横断组与椎板切除组1-6周内下肢运动功能评分(BBB评分)、4周内电生理差异有显著性意义(WMD=-12.86,95%CI-16.10至-9.62,P < 0.01)、(WMD=15.36,95%CI 11.36-19.36,P < 0.01),半横断组6周后BBB评分差异无显著性意义(WMD=-10.28;95%CI -24.20-3.64;P=0.15);脊髓全横断组与椎板切除组1-6周内BBB评分、4周内电生理差异有显著性意义(WMD=-18.83,95%CI -20.64至-17.01,P < 0.01)、(WMD= -11.21,95%CI -16.35至-6.08,P < 0.01)。椎板切除组与正常组4周内BBB评分与电生理评分差异无显著性意义(WMD=-0.00,95%CI -0.01-0.01,P=1)、(WMD= 0.43,95%CI -0.35-1.21,P=0.28);大鼠脊髓横断组和椎板切除组死亡数差异无显著性意义(RD=0.05,95%CI -0.03-0.13;P=0.26)。说明脊髓横断法是一种稳定性好、可复制性强、存活率高的脊髓损伤研究模型,但其横断的准确性、术后护理及对照组的设立有待商榷。中国组织工程研究杂志出版内容重点：肾移植;肝移植;移植;心脏移植;组织移植;皮肤移植;皮瓣移植;血管移植;器官移植;组织工程     

短期中等强度跑台运动对雄性高脂血症大鼠骨密度的影响

背景：高脂血症可导致大鼠骨质疏松,适量运动可增加骨密度,但短期运动对高脂血症导致骨质疏松的雄性动物骨密度的影响尚不清楚。 目的：探讨短期中等强度跑台运动对雄性高脂血症大鼠骨密度的影响。 方法：将26只SD雄性大鼠随机分为正常对照组(n=8)、高脂血症组(n=9)、运动干预组(n=9)。正常对照组喂饲普通饲料;其他两组喂饲高脂饲料建立大鼠高脂血症模型,持续4周。运动干预组大鼠进行跑台训练,每周训练5 d,共4周,每天强度为：第1周15 min,速度15 m/min;第2周20 min,速度15 m/min;后2周20 min,速度20 m/min,跑台坡度均为0°。实验结束后处死大鼠,取其右侧股骨检测骨密度、胫骨观察骨形态变化,测定血浆碱性磷酸酶活性和钙磷含量。 结果与结论：与正常对照组比较,高脂血症组股骨远端骨密度显著降低(P < 0.05),胫骨近端骨小梁排列稀疏变薄,间隙增宽,髓腔内有大量脂肪细胞浸润或融合成空泡,血浆碱性磷酸酶明显增加(P < 0.01)。与高脂血症组比较,运动干预组股骨远端骨密度显著增加(P < 0.05),经体质量校正后股骨全骨密度增加(P < 0.05),胫骨近端骨小梁排列致密整齐,小梁间距小,血浆碱性磷酸酶增加(P < 0.01)。血浆钙磷含量各组间差异无显著性意义。实验结果说明短期中等强度跑台运动增加高脂血症雄性大鼠骨密度。     

Micro CT定量研究去卵巢山羊胫骨平台松质骨微结构特点

背景：骨质疏松时胫骨平台松质骨微结构发生显著变化,Micro CT是一种能够全面、立体、无创测量骨微结构、评估骨质量及预测骨强度的新兴技术,近年来在骨质疏松研究领域得到日益广泛的应用。 目的：应用Micro CT技术定量研究去卵巢山羊胫骨平台松质骨的微结构特点。 方法：将12只2.5岁健康雌性山羊随机分为去卵巢组和假手术组,去卵巢组行卵巢切除,假手术组切除等量腹腔脂肪组织,每组各6只。两组实验动物分别在术后2,4年处死,分离并截取左侧胫骨平台,行Micro CT扫描,分别测量胫骨平台骨骺松质骨和干骺端松质骨微结构参数。 结果与结论：术后2和4年,与假手术组相比,去卵巢组胫骨平台骨骺和干骺松质骨微观结构参数-骨体积分数、骨小梁数量和骨小梁厚度均降低(P < 0.05),骨小梁分离度均升高(P < 0.05),基本呈时间依赖性变化。仅在术后4年,去卵巢组骨骺松质骨微观结构参数骨小梁厚度与假手术组相比差异无显著性意义(P > 0.05),其骨小梁分离度、骨小梁厚度与去卵巢组术后2年相比差异无显著性意义(P > 0.05)。无论术后2或4年,与假手术组相比,去卵巢组干骺端松质骨微结构参数的改变均比骨骺松质骨明显。结果证实,山羊胫骨平台骨骺松质骨微结构参数与干骺端松质骨具有一定的差异;骨质疏松时山羊胫骨平台松质骨微结构改变呈现出区域性特点,干骺端松质骨较骨骺松质骨微结构退变更为显著。 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程全文链接：     

水疗与电刺激联合防治大鼠失用性骨质疏松

背景：电刺激和水疗均对失用性骨质疏松有治疗作用,二者联合应用未见报道。 目的：观察水疗与电刺激联合作用对失用性骨质疏松模型大鼠生物力学的影响。 方法：采用切断坐骨神经和股神经的方法制备SD大鼠失用性骨质疏松模型。伤口愈合后采用电刺激、水疗及二者联合干预8周,观察大鼠体质量及股骨生物力学指标的变化。 结果与结论：去神经后失用性骨质疏松大鼠体质量显著增加,股骨的材料力学和结构力学指标上均出现明显异常,经电刺激和(或)水疗干预后失用性骨质疏松大鼠的体质量有所下降,股骨的材料力学和结构力学指标有所改善,尤其是电刺激和水疗联合应用,可明显改善失用性骨质疏松大鼠股骨的最大载荷、破断载荷、弹性模量和极限强度。     

改性壳聚糖联合甲基泼尼松龙促进大鼠损伤坐骨神经的修复

背景：研究表明壳聚糖能够促进周围神经损伤修复,甲基泼尼松龙可改善损伤神经附近微环境,临床常用于中枢神经损伤急性期治疗。 目的：观察改性壳聚糖联合甲基泼尼松龙修复大鼠损伤坐骨神经的效果。 方法：将大鼠坐骨神经切断,立即显微吻合,分别于神经吻合周围注入改性壳聚糖,甲基泼尼松龙,改性壳聚糖+甲基泼尼松龙,生理盐水进行干预,并设假手术组进行对比。 结果与结论：在所有组中改性壳聚糖与甲基泼尼松龙联合治疗组展爪恢复时间最早(P < 0.05)。建模后4,8,12周,与改性壳聚糖组、甲基泼尼松龙组及生理盐水对照组相比,改性壳聚糖与甲基泼尼松龙联合治疗组坐骨神经传导速度较快(P < 0.05),腓肠肌湿质量残存率下降较少(P < 0.05),腓肠肌细胞直径及截面积较大 (P < 0.05)。建模后12周,改性壳聚糖与甲基泼尼松龙联合治疗组通过吻合口的神经纤维显著增多,且直径大小、排列较为一致,神经变性较轻。结果证实,改性壳聚糖联合甲基泼尼松龙治疗有利于促进大鼠坐骨神经损伤的修复与再生。     

坐骨神经损伤模型大鼠神经传导速度及损伤运动神经元内生长相关蛋白43表达与磁刺激干预

背景：磁刺激可促进损伤神经的修复。 目的：观察磁刺激对大鼠损伤坐骨神经神经传导速度及相应水平脊髓运动神经元内生长相关蛋白43表达的影响。 方法：将60只SD大鼠随机分为实验组(n=24)、模型组(n=24)和假手术组(n=12),用一新的长17 cm的止血钳钳夹坐骨神经至第二扣,以21.95×10³ Pa维持10 s制备损伤模型。造模后24 h,实验组每天给予0.09 T的磁刺激。 结果与结论：造模后第2,4,8,12周,免疫组织化学染色显示实验组脊髓L4~5运动神经元生长相关蛋白43的表达较模型组相应时间点明显增高( P < 0. 05);造模后12周,电生理检测发现,与模型组比较,实验组再生神经传导速度加快,波幅升高,潜伏期缩短(P < 0.05)。说明磁刺激能提高损伤坐骨神经的传导速度,增加其对应脊髓节段运动神经元中生长相关蛋白43的表达,对大鼠损伤坐骨神经的修复起促进作用。     

聚乳酸和聚羟基乙酸共聚物复合膜修复坐骨神经损伤

背景：聚乳酸和聚羟基乙酸复合膜具有良好的生物相容性,稳定的机械强度,无毒副作用,可控的降解速率等特点。 目的：观察聚乳酸和聚羟基乙酸共聚物膜对大鼠坐骨神经损伤的修复作用。 方法：手术显露36只Wistar大鼠坐骨神经,随机分成3组：假手术组游离坐骨神经后不作任何处理,对照组切断坐骨神经后行神经断端直接吻合,实验组于神经吻合断端包裹聚乳酸和聚羟基乙酸共聚物膜。 结果与结论：①神经电生理学检测：术后4,6周神经传导速度及波幅比较,对照组<实验组<假手术组(P均<0.05)。②组织学检测：对照组神经与周围组织粘连严重,实验组吻合口光滑平整,聚乳酸和聚羟基乙酸共聚物膜明显降解吸收,与周围组织无粘连,对照组有髓神经数量较假手术组、实验组明显减少,且轴突再生率和再生轴突成熟度较低。③辣根过氧化物酶逆行示踪检测：对照组被辣根过氧化物酶标记的阳性有髓神经纤维数量较假手术组、实验组明显减少。表明聚乳酸和聚羟基乙酸共聚物膜能减轻神经术后粘连,促进神经再生。     

利塞膦酸钠干预骨质疏松模型大鼠髁突软骨Bcl-2、Bax及Caspase3的表达

BACKGROUND:Bisphosphonates are a kind of traditional antiresorptive drugs, which may influence the growth and development of cartilage tissue. In recent years, there are many data describing how bisphosphonates affect joint cartilage of long bone, but their effects on condylar cartilage remain unclear. OBJECTIVE:To clarify the effects of the third-generation bisphosphonate risedonate on the expression of Bcl-2 (anti-apoptotic), Bax (pro-apoptotic) and caspase-3 in the condylar cartilage of osteoporosis rats. METHODS:Thirty female Sprague-Dawley rats were randomly divided into three groups. In the sham operation group, ovary was exposed but not resected. The model group received a bilateral ovariectomy to establish the models of osteoporosis, and then received saline solution treatment (2.4 μg/kg) subcutaneously every 3 days, once a day, from 3 days pre-surgery. The treatment group received a bilateral ovariectomy to establish the models of osteoporosis, and then received risedronate treatment (2.4 μg/kg) subcutaneously every 3 days from 3 days pre-surgery. Three months after the operation, the condylar cartilages of all animals were harvested. Apoptosis, the expression of Bcl-2, BAX and Caspase3 were observed. RESULTS AND CONCLUSION:(1) The number of apoptotic cells in rat condylar cartilage and subcondylar region: the sham operation group < the treatment group < the model group (all P < 0.05). (2) Expression of Bcl-2: The trend of the model group was lower than that in the sham operation group, although there was no statistically significant difference between the two groups; Bcl-2 expression in the treatment group was statistically higher compared to the model group (P < 0.05). (3) Expression of Bax and Caspase-3: The expression levels of Bax and Caspase-3 were higher in the model group than in the sham operation group (all P < 0.05), while Bax and Caspase-3 expression was lower in the treatment group than that in the model group (all P < 0.05). The results suggested that bisphophonates can regulate apoptosis in condylar cartilage from osteoporosis rats by changing the expression of Bcl-2, Bax and Caspase-3.     

脂肪源干细胞移植骨质疏松模型大鼠骨密度及骨形态计量学指标的变化

BACKGROUND:Stem cell transplantation is increasingly hoped to promote osteoblast differentiation and inhibit osteoclast proliferation in the treatment of osteoporosis. OBJECTIVE:To study the therapeutic effect of exogenous adipose-derived stem cell (ADSC) transplantation on osteoporosis in ovariectomized rats. METHODS:Thirty Sprague-Dawley female rats were equivalently randomized into sham, model, ADSC transplantation groups. Rats in all groups except the sham group underwent bilateral ovariectomy to make osteoporosis models. Surrounding adipose tissues instead of the ovary were removed in the sham group. After modeling, rats were given 2×10⁶ ADSCs at passage 4 via the tail vein in the transplantation group and the same volume of normal saline in the model group, once a week. After 6 weeks, levels of serum calcium, phosphorus, and alkaline phosphatase as well as bone mineral density and histomorphometry indicators were detected in rats. RESULTS AND CONCLUSION:Compared with the sham group, the trabecular bone volume fraction was significantly decreased in the model group (P < 0.01), but remarkably increased after ADSC transplantation (P < 0.05). After modeling, the bone trabecular absorption surface percentage and rate of bone trabecular formation were elevated significantly (P < 0.05 or P < 0.01), while these increases were improved by ADSC transplantation (P < 0.05). Additionally, the levels of serum calcium and alkaline phosphatase and bone mineral density were significantly decreased after modeling, but were increased after ADSC transplantation. In contrast, the serum level of phosphorus was significantly increased in the model group (P < 0.05) but decreased markedly in the ADSC transplantation group (P < 0.05). To conclude, ADSC transplantation can reduce the loss of bone mass in osteoporosis rats by ovariectomy.     

针刺康复疗法影响脑性瘫痪模型大鼠大脑病变组织生长相关蛋白43和突触小泡蛋白的表达

BACKGROUND:Acupuncture + rehabilitation therapy is the most effective treatment for cerebral palsy. Growth associated protein-43 and synaptophysin were characteristic markers for neurodevelopment and synaptic density, and involved in nerve cell growth, repair, regeneration and synapse remodeling. OBJECTIVE:To study the effects of acupuncture + rehabilitation therapy on the expression of growth associated protein-43 and synaptophysin in cerebral palsy rats and to investigate the mechanism of acupuncture + rehabilitation therapy on cerebral palsy.   METHODS:The 125 rats were randomly divided into five groups: sham group, model group, rehabilitation group, acupuncture group, and acupuncture + rehabilitation group. Rat models of cerebral palsy were established in model group, rehabilitation group, acupuncture group, and acupuncture + rehabilitation group. Rat models in the sham and model groups did not receive treatment. Rat models in the rehabilitation group underwent rehabilitation training. Rat models in the acupuncture group were subjected to acupuncture. Rat models in the acupuncture + rehabilitation group underwent rehabilitation training and acupuncture. RESULTS AND CONCLUSION:(1) Motor function: The motor function scores were better in the acupuncture + rehabilitation group than in the model, acupuncture, and rehabilitation groups (P < 0.05). (2) Growth associated protein-43 and synaptophysin expression: immunohistochemical staining revealed that compared with the model group, growth associated protein-43 expression at 2-4 weeks and synaptophysin expression at 4 and 5 weeks were higher in the acupuncture and acupuncture + rehabilitation groups (P < 0.05); the increase in above expression was most significant in the acupuncture + rehabilitation group (P < 0.05). (3) Results confirmed that acupuncture combined with rehabilitation promoted growth associated protein-43 and synaptophysin expression in rats with cerebral palsy and exerted neuroprotective effect.     

病毒转染骨髓基质干细胞在不同移植点对颅脑损伤的保护

BACKGROUND:Bone marrow stromal cells can differentiate into nerve cells to promote nerve tissue repair, but the exact mechanism has not been fully elucidated. OBJECTIVE:To explore the influence of adenovirus-mediated β nerve growth factor transfection on bone marrow stromal stem cell transplantation fighting against brain injury in rats. METHODS:(1) Rat bone marrow stromal stem cells were cultured in vitro, transfected with the adenovirus-mediated β nerve growth factor and directionally induced using β-mercaptoethanol. (2) A total of 210 Sprague-Dawley rats were randomized into induction+tranfection group, induction+non-transfection group, induction+medium group, model group, and sham group (n=42 per group). Rat skull injury models were made, and given corresponding treatments at different time points (12, 24, 36, 48, 72 hours). Neurological function of rats was evaluated based on neurological severity scores on the day that the rats were given transplantation, and 1, 2, 3, 4 weeks after transplantation. (3) Another 75 Sprague-Dawley rats were also divided into five groups (n=15 per group) as above, followed by model establishment and corresponding treatments at 24 hours after modeling. Neurological severity scores were recorded at the same day, 1, 2, 3, 4 weeks after transplantation. Five rats from each group were sacrificed to detect levels of malondialdehyde and superoxide dismutase in the rat brain at the same day, 2 and 4 weeks after transplantation, respectively. RESULTS AND CONCLUSION:If the cells were transplanted within 48 hours after modeling, the neurological severity scores in the induction+transfection group decreased significantly compared with the induction+non-transfection group and model group at 1 and 2 weeks after transplantation (P < 0.05). If the cells were transplanted at different time, the neurological severity scores in the induction+transfection group were decreased significantly compared with the induction+non-transfection group and model group at 3 and 4 weeks after transplantation (P < 0.05). If the cells were transplanted within 24 hours after modeling, the neurological severity scores in the induction+transfection group decreased significantly compared with the model group at 1 week after transplantation (P < 0.05), and the neurological severity scores in the induction+transfection group and induction+non-transfection group both were significantly lower than those in the model group (P < 0.05). Two weeks after cell transplantation, the level of superoxide dismutase was significantly higher in the induction+transfection group than the induction+medium group and model group (P < 0.05), but the level of malondialdehyde was significantly lower (P < 0.05). All these findings indicate that adenovirus-mediated β nerve growth factor transfer plays a certain neuroprotective role in bone marrow stromal stem cell transplantation for brain injury in rats.