高张盐水在局灶性脑缺血再灌注损伤中的作用及其机制

Objective To investigate the effect of hypertonic saline on cerebral water content, tumor necrosis factor-α (TNF-α) level and neuronal apoptosis following focal cerebral ischemia-reperfusion (IR) injury in rats and explore the mechanisms involved. Methods Ninety-six rats were randomized equally into 4 groups, namely the shame-operated group, untreated IR injury group, and 4.2% and 7.5% hypertonic saline groups (HS-A and HS-B groups, respectively). In the latter 3 groups, cerebral ischcmia was induced by middle cerebral artery occlusion for 2 h followed by administration of the corresponding treatments. Serum sodium concentration was measured at 5 min before and at 30, 60 and 90 min after the reperfilsion. At 22 h of rcperfusion, the rats were sacrificed after neurological deficit evaluation, and brain edema was assessed by measuring the wet-to-dry weight ratio of the brain tissue. TNF-α expression in the ischemic brain tissue was measured by enzyme-linked immunosorbent assay (ELISA), and the neuronal apoptosis was analyzed using TUNEL assay. Results In the saline-treated rats, serum sodium level increased significantly after saline administration, lasting for 60 min before recovering the normal levels in HS-A group and for over 90 min in HS-B group. Compared with that in the sham-operated group, the brain water content in rats of the IR group increased in both of the hemispheres, but more obviously in the ischemic hemisphere. In the two saline-treated groups, the water content decreased significantly in the bilateral hemispheres, which was especially obvious in the ischemic hemisphere;administration of 7.5% saline resulted in greater water content reduction in the ischemic hemisphere than 4.2% saline. Compared with the IR group, the two saline-treated groups showed significant reduction in TNF-α levels and apoptotic cells in the brain along with decreased neurological deficits. Conclusion Hypertonic saline can ameliorate cerebral focal IR injury by decreasing the cerebral water content, TNF-α level and neuronal apoptosis following the injury.     

基因工程杂交酵母艾滋病疫苗研究

目的 对以酵母为载体所制得的艾滋病候选疫苗进行研究。方法 构建表达Gag及IL-2的质粒载体，将表达载体分别转化入酵母细胞，通过酵母杂交获得同时表达两种基因的酵母杂交体，放大培养后经灭活、分装、冻干，制得细胞干粉作为试验的疫苗。用小鼠及食蟹猴对试验疫苗进行有效性及安全性研究。结果 杂交酵母可以稳定表达Gag及IL-2；经皮下注射可以分别在小鼠及食蟹猴体内诱导一定水平的细胞免疫反应；对小鼠肿瘤模型的研究表明，疫苗可以诱导有效的免疫保护反应；疫苗的安全性良好，没有明显的毒副作用，只在注射部位引起轻微的红肿，个别动物有低热反应，但均在一周左右恢复正常。结论杂交酵母艾滋病疫苗具有诱导细胞免疫反应的能力；杂交酵母载体疫苗在相关疾病的治疗方面有良好的应用前景。     

高张盐水在局灶性脑缺血再灌注损伤中的作用及其机制

Objective To investigate the effect of hypertonic saline on cerebral water content, tumor necrosis factor-α (TNF-α) level and neuronal apoptosis following focal cerebral ischemia-reperfusion (IR) injury in rats and explore the mechanisms involved. Methods Ninety-six rats were randomized equally into 4 groups, namely the shame-operated group, untreated IR injury group, and 4.2% and 7.5% hypertonic saline groups (HS-A and HS-B groups, respectively). In the latter 3 groups, cerebral ischcmia was induced by middle cerebral artery occlusion for 2 h followed by administration of the corresponding treatments. Serum sodium concentration was measured at 5 min before and at 30, 60 and 90 min after the reperfilsion. At 22 h of rcperfusion, the rats were sacrificed after neurological deficit evaluation, and brain edema was assessed by measuring the wet-to-dry weight ratio of the brain tissue. TNF-α expression in the ischemic brain tissue was measured by enzyme-linked immunosorbent assay (ELISA), and the neuronal apoptosis was analyzed using TUNEL assay. Results In the saline-treated rats, serum sodium level increased significantly after saline administration, lasting for 60 min before recovering the normal levels in HS-A group and for over 90 min in HS-B group. Compared with that in the sham-operated group, the brain water content in rats of the IR group increased in both of the hemispheres, but more obviously in the ischemic hemisphere. In the two saline-treated groups, the water content decreased significantly in the bilateral hemispheres, which was especially obvious in the ischemic hemisphere;administration of 7.5% saline resulted in greater water content reduction in the ischemic hemisphere than 4.2% saline. Compared with the IR group, the two saline-treated groups showed significant reduction in TNF-α levels and apoptotic cells in the brain along with decreased neurological deficits. Conclusion Hypertonic saline can ameliorate cerebral focal IR injury by decreasing the cerebral water content, TNF-α level and neuronal apoptosis following the injury.     

人巨细胞病毒特异性IgM和IgA检测

人巨细胞病毒(HCMV)是人类普遍易感的病毒之一,是导致各种先天性胎儿畸形的主要病毒,有些受感染胎儿在出生时虽无症状,但在学龄前可出现智力降低、神经和精神性运动并发症,严重危害儿童身体健康,作者采用间接ELISA法对88例正常孕妇和94例患儿活动性CMV感染情况进行调查研究,现将初步研究结果报告如下。     

卡介苗和短小棒状杆菌对家兔小鼠产生肿瘤坏死血清活性的比较

肿瘤坏死因子(Tumor Necrosis Factor,TNF)已于1985年用于治疗癌症病人。因此,如何大量、快速、简便地诱生高效价的TNF,已成为迫切需要解决的问题。虽然多种动物经卡介苗(BCG)或短小棒状杆菌(CP)刺     

高张盐水在局灶性脑缺血再灌注损伤中的作用及其机制

Objective To investigate the effect of hypertonic saline on cerebral water content, tumor necrosis factor-α (TNF-α) level and neuronal apoptosis following focal cerebral ischemia-reperfusion (IR) injury in rats and explore the mechanisms involved. Methods Ninety-six rats were randomized equally into 4 groups, namely the shame-operated group, untreated IR injury group, and 4.2% and 7.5% hypertonic saline groups (HS-A and HS-B groups, respectively). In the latter 3 groups, cerebral ischcmia was induced by middle cerebral artery occlusion for 2 h followed by administration of the corresponding treatments. Serum sodium concentration was measured at 5 min before and at 30, 60 and 90 min after the reperfilsion. At 22 h of rcperfusion, the rats were sacrificed after neurological deficit evaluation, and brain edema was assessed by measuring the wet-to-dry weight ratio of the brain tissue. TNF-α expression in the ischemic brain tissue was measured by enzyme-linked immunosorbent assay (ELISA), and the neuronal apoptosis was analyzed using TUNEL assay. Results In the saline-treated rats, serum sodium level increased significantly after saline administration, lasting for 60 min before recovering the normal levels in HS-A group and for over 90 min in HS-B group. Compared with that in the sham-operated group, the brain water content in rats of the IR group increased in both of the hemispheres, but more obviously in the ischemic hemisphere. In the two saline-treated groups, the water content decreased significantly in the bilateral hemispheres, which was especially obvious in the ischemic hemisphere;administration of 7.5% saline resulted in greater water content reduction in the ischemic hemisphere than 4.2% saline. Compared with the IR group, the two saline-treated groups showed significant reduction in TNF-α levels and apoptotic cells in the brain along with decreased neurological deficits. Conclusion Hypertonic saline can ameliorate cerebral focal IR injury by decreasing the cerebral water content, TNF-α level and neuronal apoptosis following the injury.     

高张盐水在局灶性脑缺血再灌注损伤中的作用及其机制

Objective To investigate the effect of hypertonic saline on cerebral water content, tumor necrosis factor-α (TNF-α) level and neuronal apoptosis following focal cerebral ischemia-reperfusion (IR) injury in rats and explore the mechanisms involved. Methods Ninety-six rats were randomized equally into 4 groups, namely the shame-operated group, untreated IR injury group, and 4.2% and 7.5% hypertonic saline groups (HS-A and HS-B groups, respectively). In the latter 3 groups, cerebral ischcmia was induced by middle cerebral artery occlusion for 2 h followed by administration of the corresponding treatments. Serum sodium concentration was measured at 5 min before and at 30, 60 and 90 min after the reperfilsion. At 22 h of rcperfusion, the rats were sacrificed after neurological deficit evaluation, and brain edema was assessed by measuring the wet-to-dry weight ratio of the brain tissue. TNF-α expression in the ischemic brain tissue was measured by enzyme-linked immunosorbent assay (ELISA), and the neuronal apoptosis was analyzed using TUNEL assay. Results In the saline-treated rats, serum sodium level increased significantly after saline administration, lasting for 60 min before recovering the normal levels in HS-A group and for over 90 min in HS-B group. Compared with that in the sham-operated group, the brain water content in rats of the IR group increased in both of the hemispheres, but more obviously in the ischemic hemisphere. In the two saline-treated groups, the water content decreased significantly in the bilateral hemispheres, which was especially obvious in the ischemic hemisphere;administration of 7.5% saline resulted in greater water content reduction in the ischemic hemisphere than 4.2% saline. Compared with the IR group, the two saline-treated groups showed significant reduction in TNF-α levels and apoptotic cells in the brain along with decreased neurological deficits. Conclusion Hypertonic saline can ameliorate cerebral focal IR injury by decreasing the cerebral water content, TNF-α level and neuronal apoptosis following the injury.     

高张盐水在局灶性脑缺血再灌注损伤中的作用及其机制

Objective To investigate the effect of hypertonic saline on cerebral water content, tumor necrosis factor-α (TNF-α) level and neuronal apoptosis following focal cerebral ischemia-reperfusion (IR) injury in rats and explore the mechanisms involved. Methods Ninety-six rats were randomized equally into 4 groups, namely the shame-operated group, untreated IR injury group, and 4.2% and 7.5% hypertonic saline groups (HS-A and HS-B groups, respectively). In the latter 3 groups, cerebral ischcmia was induced by middle cerebral artery occlusion for 2 h followed by administration of the corresponding treatments. Serum sodium concentration was measured at 5 min before and at 30, 60 and 90 min after the reperfilsion. At 22 h of rcperfusion, the rats were sacrificed after neurological deficit evaluation, and brain edema was assessed by measuring the wet-to-dry weight ratio of the brain tissue. TNF-α expression in the ischemic brain tissue was measured by enzyme-linked immunosorbent assay (ELISA), and the neuronal apoptosis was analyzed using TUNEL assay. Results In the saline-treated rats, serum sodium level increased significantly after saline administration, lasting for 60 min before recovering the normal levels in HS-A group and for over 90 min in HS-B group. Compared with that in the sham-operated group, the brain water content in rats of the IR group increased in both of the hemispheres, but more obviously in the ischemic hemisphere. In the two saline-treated groups, the water content decreased significantly in the bilateral hemispheres, which was especially obvious in the ischemic hemisphere;administration of 7.5% saline resulted in greater water content reduction in the ischemic hemisphere than 4.2% saline. Compared with the IR group, the two saline-treated groups showed significant reduction in TNF-α levels and apoptotic cells in the brain along with decreased neurological deficits. Conclusion Hypertonic saline can ameliorate cerebral focal IR injury by decreasing the cerebral water content, TNF-α level and neuronal apoptosis following the injury.     

破骨细胞抑制凝集素相关蛋白2的真核表达及多克隆抗体制备

目的：为了获得真核表达的重组蛋白OCILRP2-Fc和OCILRP2特异性抗体,用于OCILRP2生物学功能的进一步研究。方法：构建了融合人IgG Fc段的小鼠OCILRP2真核表达载体pIg-CD5-OCILRP2,将pIg-CD5-OCILRP2转染CHO细胞,G418筛选稳定表达细胞株;Protein A 亲和层析从 CHO 细胞培养上清中纯化重组蛋白OCILRP2-Fc 并免疫家兔制备OCILRP2多克隆抗体。 ELISA检测抗血清和多克隆抗体的效价,Western blot 验证多克隆抗体的特异性,并应用该抗体检测OCILRP2在树突状细胞（ Dendritic cells ,DC）中的表达。结果：ELISA结果表明OCILRP2-Fc稳定表达细胞株经过多次传代培养后仍然具有较高的蛋白表达水平;SDS-聚丙烯酰胺凝胶电泳结果显示纯化后的蛋白只有单一条带出现,且该条带可以被抗人IgG检测到;重组蛋白OCILRP2-Fc免疫家兔获得的抗血清和纯化后得到的OCILRP2多克隆抗体效价分别为1∶1280000和1∶320000,Western blot证明该抗体可以和免疫原OCILRP2-Fc及NIH/3T3细胞中表达的OCILRP2特异性结合。应用该抗体检测OCILRP2在 DC 的表达发现 OCILRP2在成熟 DC 的表达明显高于不成熟 DC。结论：获得了真核表达的重组蛋白OCILRP2-Fc和高效价的OCILRP2特异性抗体,为进一步研究OCILRP2在免疫应答中的功能奠定了基础。     

高张盐水在局灶性脑缺血再灌注损伤中的作用及其机制

Objective To investigate the effect of hypertonic saline on cerebral water content, tumor necrosis factor-α (TNF-α) level and neuronal apoptosis following focal cerebral ischemia-reperfusion (IR) injury in rats and explore the mechanisms involved. Methods Ninety-six rats were randomized equally into 4 groups, namely the shame-operated group, untreated IR injury group, and 4.2% and 7.5% hypertonic saline groups (HS-A and HS-B groups, respectively). In the latter 3 groups, cerebral ischcmia was induced by middle cerebral artery occlusion for 2 h followed by administration of the corresponding treatments. Serum sodium concentration was measured at 5 min before and at 30, 60 and 90 min after the reperfilsion. At 22 h of rcperfusion, the rats were sacrificed after neurological deficit evaluation, and brain edema was assessed by measuring the wet-to-dry weight ratio of the brain tissue. TNF-α expression in the ischemic brain tissue was measured by enzyme-linked immunosorbent assay (ELISA), and the neuronal apoptosis was analyzed using TUNEL assay. Results In the saline-treated rats, serum sodium level increased significantly after saline administration, lasting for 60 min before recovering the normal levels in HS-A group and for over 90 min in HS-B group. Compared with that in the sham-operated group, the brain water content in rats of the IR group increased in both of the hemispheres, but more obviously in the ischemic hemisphere. In the two saline-treated groups, the water content decreased significantly in the bilateral hemispheres, which was especially obvious in the ischemic hemisphere;administration of 7.5% saline resulted in greater water content reduction in the ischemic hemisphere than 4.2% saline. Compared with the IR group, the two saline-treated groups showed significant reduction in TNF-α levels and apoptotic cells in the brain along with decreased neurological deficits. Conclusion Hypertonic saline can ameliorate cerebral focal IR injury by decreasing the cerebral water content, TNF-α level and neuronal apoptosis following the injury.