神经营养因子的生物学作用及应用展望

神经营养因子是一类特殊的蛋白质，它具有特异的神经营养活性作用。文章对其作用机制的研究进展作简要介绍，并对以Aizheimer病为代表的认知功能障碍性疾病的脑内病因及神经营养因子防治作用的实验研究与临床试用进行了评述。     

尼卡地平对脑缺血后海马CA1锥体神经元的影响

目的　观察尼卡地平对脑缺血后海马CA1锥体神经元的影响。方法　 30只沙土鼠随机分成假手术组 (Ⅰ组 ,n =10 )、缺血组 (Ⅱ组 ,n =10 )和尼卡地平处理组 (Ⅲ组 ,n =10 )。Ⅰ组只进行手术操作 ,不行脑缺血 ;Ⅱ组阻断双侧颈总动脉 15min造成前脑缺血模型 ;Ⅲ组在脑缺血前 30min腹腔注射尼卡地平 2mg/kg体重。 3d后取出动物脑组织 ,HE染色计数海马CA1区 1mm长度内正常锥体细胞数。结果　与Ⅰ组相比 ,Ⅱ组和Ⅲ组正常锥体细胞数明显减少 (P <0 .0 1) ;Ⅱ组的正常锥体细胞数少于Ⅲ组 (P <0 .0 1)。结论　尼卡地平能减轻脑缺血后脑细胞损伤。     

Effects of Platelet Factor 4 on Expression of Bone Marrow Heparan Sulfate in Syngenic Bone Marrow Transplantation Mice

Platelet factor 4 ( PF4) is a negativehematopoietic factor.It can inhibit the prolifera-tion of endothelial cells and hematopoietic stem/progenitor cells,particularly megakaryoryocyticcells,reversibly[1] ,inhibit DNA synthesis,blockcell cycle progression during S phase and reducethe sensibility of normal hematopoietic stem/pro-genitor cells,but not some cancer or leukemia celllines,to cytotoxic drugs and ionizing radia-tion[2 - 3] ,and it also can cause a population in-crease of the stem cel…     

赤芍总苷对沙土鼠全脑缺血再灌注损伤的保护作用

OBJECTIVE: To study the protective effects of the total paeony glycoside (TPG) against global cerebral ischemia-reperfusion injury in gerbils. METHODS: Gerbils models of global cerebral ischemia-reperfusion injury were prepared by bilateral common carotid artery ligation for 12 min followed by 24-hour reperfusion. The effects of TGP on brain edema index, superoxide dismatase (SOD) activity and malonaldehyde (MDA) concentration of the cerebral tissue homogenate and pathology of the brain were examined 24 h after model establishment. RESULTS: Compared with the model group, TPG at the doses of 200 and 400 mg/kg could significantly relieve brain edema, enhance SOD activity and lower MDA concentration in the gerbils. Pathological examination showed that the gerbils with TPG treatment had milder injury of the cells in the hippocampal CA1 region. CONCLUSIONS: TPG has obvious protective effects against global cerebral ischemia-reperfusion injury.     

药食两用话酸枣

酸枣,又名棘刺、山枣、红珠、檀酸枣、红铃果、圪针果,处方名为酸枣仁,属鼠李科落叶灌木或乔木的成熟果实。酸枣生命力旺盛,适应性强,广泛分布于我国中、北部地区,无论林间地头、石缝崖边、向阳山坡、溪边草丛都适宜它的生长。酸枣色形似枣,其味甘酸,故名。     

12C6+重离子诱导小鼠肝组织一氧化氮合酶活性的变化

Voevodskaya等用电子自旋共振捕集技术首次在γ射线全身照射小鼠后于肝、肾、脾等组织中检测到一氧化氮（NO）。并认为NO的产生与组织中一氧化氮合酶（iNOS）活性升高有关。随后大量研究资料证实X或γ射线可诱导小鼠组织中iNOS活性升高并产生大量NO，并且iNOS活性在照射3～4h后升高明显。但是，有关重离子能否诱导小鼠组织中iNOS活性的报道较少。笔者在本文中主要介绍用^12C^6＋重离子整体照射小鼠4h后，诱导小鼠肝组织中iNOS活性的变化。     

甘西鼠尾与丹参三种有效成分含量的比较

采用高效液相色谱法测定西藏甘西鼠尾中丹参素、原儿茶酸、原儿茶醛含量，并与丹参作比较。结果表明，西藏甘西鼠尾中上述成分含量比丹参高。     

鼠李糖脂分批式发酵动力学模型

根据3.7 L瑞士Bioengineer KLF2000型发酵罐分批发酵的实验数据,利用GraphPad Prism软件对假单胞菌BS-03产鼠李糖脂生物表面活性剂的发酵动力学模型进行非线性拟合,说明Logistic模型和L-P模型能较好的描述假单胞菌BS-03发酵过程中的菌体生长、鼠李糖脂合成和限制性基质的消耗动力学。