Electrophysiological study on differentiation of rat bone marrow stromal stem cells into neuron-like cells in vitro by edaravone

To explore the electrophysiological proper-ties of differentiation of rat bone marrow-derived stromal stem cells (rBMSCs) to neuron-like cells in vitro by edaravone, a new type of free radical scavenger. Methods: Stromal stem cells were separated from rat bone marrow with Ficoll-Paque reagent and expanded in different culture medium in vitro, rBMSCs were induced by edaravone containing serum-free L-DMEM. Morphologic observation and Western blot analysis including the ex-pression of Nav1.6, Kv1.2, Kv1.3, Cav1.2 were performed, and whole patch-clamp technique was used. Results: Cyton contraction and long processes were shown in differentiated stromal stem cells. Nav1.6, Kv1.2, Kv1.3 and Cav1.2 were expressed in both differentiated and undifferentiated cells. However, the expression of channel proteins in differentiated cells was up-regulated. Consistently, their resting potential and outward currents were also enhanced in the differentiated cells, which was especially significant in the outward rectifier potassium current. Conclusion: In vitro, neuron-like cells derived from rBMSCs, induced by edaravone, possess electrophysiologi-cal properties of neurons.     

肱骨近端锁定钢板加同种异体骨移植治疗Neer3、4部分骨折

[目的]总结和评价应用肱骨近端锁定钢板(locking proximal humeral plate,简称LPHP)加同种异体骨移植治疗Neer 3部分、4部分肱骨近端骨折的临床疗效。[方法]2003年1月~2006年4月,应用LPHP加同种异体骨移植治疗21例Neer 3部分、4部分肱骨近端骨折患者,其中男14例,女7例,年龄31~57岁,平均46岁。根据Neer分类,3部分骨折13例,4部分骨折8例,其中伴肩关节脱位5例。[结果]21例获得平均18个月(12~24个月)的随访;21例骨折全部愈合,愈合时间为4~10个月,平均4.3个月。按Neer评分标准评分,优14例,良5例,可2例,总优良率达90.5%。[结论]LPHP加同种异体骨移植治疗Neer3部分、4部分肱骨近端骨折疗效满意,尤其是对于Neer 4部分骨折保留肱骨头,是一种有效的治疗方法。     

醋酸曲安缩松注射液的一阶导数分光光度测定

采用一阶导数分光光度法测定醋酸曲安缩松注射液的含量，平均回收率为９９．８２％，ＲＳＤ为０．３９％。方法简便快速，结果满意。     

Effects of dauricine,quinidine,and sotalol on action potential duration of papillary muscles in vitro

目的：观察蝙蝠葛碱对豚鼠乳头状肌的动作电位是否具有使用依赖性特征，并与奎尼丁、索他洛尔作平行比较．方法：利用细胞内微电极技术记录豚鼠乳头状肌跨膜动作电位．结果：蝙蝠葛碱２０μｍｏｌ·Ｌ－１能明显延长乳头状肌跨膜动作电位时程，在刺激周长为２００，３００，４００，６００，８００，１０００，２０００ｍｓ时，其延长动作电位时程的百分率分别为２２±８，１１±６，９±５，７±５，６±３，４３±２８，４５±２８，蝙蝠葛碱延长动作电位时程作用于刺激周期较短时作用明显，呈使用依赖性特征．而奎尼丁１μｍｏｌ·Ｌ－１和索他洛尔１０μｍｏｌ·Ｌ－１延长动作电位时程作用随刺激周期延长而增强，呈现逆向使用依赖性特征．结论：蝙蝠葛碱使用依赖性延长豚鼠乳头状肌动作电位时程．     

荆芥连翘汤对促进皮肤溃疡愈合的影响

目的 观察荆芥连翘汤对小鼠皮肤溃疡的治疗作用。方法 建立小鼠皮肤创伤和烫伤两种皮肤溃疡模型．比较荆芥连翘汤以及rhEGF的用药组和自身对照组小鼠皮肤溃疡面积，用昆微镜观察溃疡面炎症细胞浸润情况。结果 和自身对照组相比，荆芥连翘汤可明显缩小小鼠皮肤溃疡面积（P〈0．001），同时炎症细胞浸润显著减少（P〈0．001）；荆芥连翘汤用药组疗效显著优于rhEGF用药组。结论 荆芥连翘汤可明显促进小鼠皮肤溃疡的愈合。     

利多卡因对兔内毒素性急性肺损伤的预防作用

目的　研究利多卡因对兔内毒素性急性肺损伤的预防作用。方法　雄性健康新西兰兔 2 4只 ,分 3组 :空白组 (S -S ,输注生理盐水 ) ,内毒素组 (L -S ,输注内毒素后输注生理盐水 ) ,预防组 (Ld2 -L ,输注内毒素前 10min输注利多卡因负荷量 2mg·kg- 1 ,然后 2mg·kg- 1 ·h- 1 ) ,控制呼吸 ,吸氧浓度 95 % ,输注内毒素后 6h杀兔。观察氧合指数 (PaO2 FiO2 )、肺动态顺应性 (Cdyn)、支气管肺泡灌洗液 (BALF)白蛋白含量、肺湿 干重比值、肺组织超氧化物歧化酶 (SOD)、丙二醛 (MDA)和髓过氧化物酶 (MPO)以及肺形态学变化。结果　内毒素组PaO2 FiO2 、Cdyn 和肺组织SOD活性明显下降 ;BALF白蛋白含量、肺湿 干重比值和肺组织MDA和MPO含量明显上升 ;肺泡结构严重毁坏 ,肺泡间隔增宽 ,大量炎症细胞浸润。利多卡因预防可明显减轻这些变化。结论　利多卡因对兔内毒素性急性肺损伤有明显的预防作用     

Effects of basic fibroblast growth factor on biological characteristics of osteoblasts

Objective: To elucidate the effects of exogenous basic fibroblast growth factor ( bFGF ) on biological characteristics of rat osteoblasts cultured in vitro. Methods: The osteoblasts isolated from a Sprague-Dawley rat and cultured in vitro were treated with different concentrations of bFGF ( 5-50 ng/ml) respectively. At 24 hours after treatment, the proliferating cell nuclear antigen was measured with immunocytochemistry, alkaline phosphatase (ALP) activity was determined and the expression of transforming growth factor beta 1 ( TGF-β1 )was detected to observe the effects of bFGF on growth and differentiation of osteoblasts. Resu/ts: bFGF ( 5-50 ng/ml ) could obviously promote the growth of osteoblasts. The intracellular expression of TGF-β1 mRNA increased significantly, but the intracellular ALP content decreased. Conclusions: bFGF can obviously stimulate the proliferation of osteoblasts and promote the synthesis of TGF-β1, but cannot promote the differentiation of osteoblasts.     

广州家禽、家畜批发市场六种动物隐孢子虫感染情况的调查

目的调查广州家禽、家畜批发市场兔、鸭(含雏鸭)、羊、鸡、狗、鸽6种动物的隐孢子虫感染情况。方法取上述动物的粪便292份，用金胺-酚-改良抗酸复染法染色，镜检卵囊。结果检查的6种动物均发现有隐孢子虫感染，自然感染率分别为：64．1％，54．3％(45．0％)，21．7％，20．6％，20．0％，14．6％。结论广州家禽、家畜批发市场6种动物存在隐孢子虫感染。     

高效液相色谱法测定人肝细胞色素P450 3A4转基因细胞中氨氯地平

目的 :研究氨氯地平经人肝细胞色素 P4 5 0 3A4 (CYP3A4 )的代谢 ,建立反相高效液相色谱的测定人肝转基因细胞 CYP3A4酶 S9孵育液中氨氯地平浓度的方法。方法 :与人肝转基因细胞提取的 S9上清液孵育之后的样品 ,用 3倍量的甲醇沉淀后离心 ,取上清液用 0 .4 5μm微孔滤膜滤过后进样。采用 Hypersil C18柱 ,以乙腈 -磷酸盐缓冲液 (4 5∶ 5 5 ,v/ v,p H4 .5 )为流动相 ,普萘洛尔为内标 ,在 2 5 0 nm波长处测定。结果 :氨氯地平浓度在 0 .2～ 30 .0μg/ ml范围内线性关系良好 ,r=0 .9993,方法平均回收率为 (98.2± 2 .4 ) % (n=5 ) ,日内和日间相对标准偏差(RSD)均小于 10 % ,检测限为 2 0 ng/ ml,定量限为 0 .2 μg/ ml(回收率为 10 4 .0 % ,RSD为 11.4 % ,n=5 )。结论 :建立的反相高效液相色谱方法简便、准确 ,可用于研究氨氯地平在人肝 CYP3A4转基因细胞中的代谢。