卡铂水溶液的光分解产物

卡铂是第二代铂族抗癌药物,其水溶液有见光分解的不稳定特性。本文用HPLC定性方法及红外光谱、热重分析和光电子能谱对光解产物进行了检测。结果表明卡铂水溶液在光的作用下发生水解反应,生成有害的水解产物,因此建议在临床备制和使用卡铂注射液时要避光。     

Antegrade puncture of the femoral artery: morphologic study

To determine the optimal site for antegrade puncture of the femoral artery, the authors evaluated three cadaver specimens and computed tomographic (CT) scans of 50 patients. The relationships among the common femoral artery, the femoral artery bifurcation, the center of the femoral head, and the inguinal ligament were evaluated. CT showed that the center of the femoral head was always located caudal to the level of the inguinal ligament but cranial to the bifurcation of the common femoral artery. Therefore, the femoral head seems to provide a reliable landmark for entering the common femoral artery.     

The role of mother's voice in the organization of brain function in the newborn

Newborn infants prefer the sound of the maternal voice within the first two days after birth. This early preference may be based on prenatal experience. The mother's voice is reported to be the most intense acoustical signal measured in the amniotic environment. Data showing the ability of the newborn to demonstrate voice preferences are presented. We have also investigated the response of the perinatal autonomic nervous system to speech sound stimulation. Both the newborn and fetus show heart rate decelerations in response to speech sounds. This cardiorespiratory attentional response occurs during sleep when sensory stimulation is probably influencing perinatal brain development. Early experience with voice has both acute and enduring effects on the developing brain. These effects have ramifications for the development of the auditory system, as well as for later social and emotional development. Further speculation and discussion on the form, function and assessment of newborn responsiveness to voice will be offered.     

相关信号转导分子在创伤性兔膝骨关节炎发病中的变化

目的:在创伤性兔膝骨关节炎的发病机制中关节软骨细胞凋亡、诱导型一氧化氮合酶、基质金属蛋白酶组织抑制因子3、尿激酶型纤溶酶原激活物及其受体蛋白均会发生一些变化,观察其相关特征,从而确立骨关节炎"细胞通讯"的病理机制。方法:实验于2004-07/2006-07在兰州大学第一附属医院中心实验室及甘肃中医学院实验室完成。①实验动物:将36只健康青紫蓝家兔(雌雄各半)随机分成正常组、模型组各18只。②实验方法:模型组用硫喷妥钠30mg/kg腹腔麻醉,在无菌条件下取双侧膝关节内侧切口长约3cm,直视下探查关节腔无原发病变后,用眼科剪伸入切断前后交叉韧带、内侧副韧带、完整切除内侧半月板进行造模,正常组不作任何处理。③实验评估:运用流式细胞分析法、免疫组化法分别于6、8周两个时期进行DNA倍体含量、基质金属蛋白酶组织抑制因子3、尿激酶型纤溶酶原激活物及其受体蛋白、诱导型一氧化氮合酶蛋白阳性强度观察。结果:参加实验36只家兔,进入结果分析20只。①诱导型一氧化氮合酶蛋白表达:6周时各组间差异无显著性,8周时模型组损伤胶原化区与各组间差异显著(P<0.05)。②基质金属蛋白酶组织抑制因子3蛋白表达:6周时各组间比较差异有显著性,正常组6周和8周比较差异有显著性(P<0.05)。③细胞凋亡情况:8周时正常组与模型组DNA比率差异有显著性、但细胞凋亡均数差异无显著性。④尿激酶型纤溶酶原激活物及其受体蛋白表达:6,8周时各组间比较差异有显著性;正常组与模型组损伤胶原化区、正常组与模型组增殖肥厚区、正常组与模型组无损伤区;损伤胶原化区与增殖肥厚区、损伤胶原化区与无损伤区间差异有统计学意义(P<0.05);正常组和模型组6周和8周比较差异均有显著性(P<0.05)。结论:骨关节炎病理机制中存在破坏与修复相互拮抗平衡的分子"多轴心机制"。     

白三烯拮抗剂ONO-1078对小鼠持续性局灶性脑缺血的作用

目的在小鼠模型研究白三烯拮抗剂{4-氧-8-[对-(4-苯丁氧基)苯甲酰氨基]-2-(5-四唑基)-4H-1-苯并吡喃半水合物(ONO-1078)}对脑缺血的保护作用.方法以大脑中动脉阻塞法诱导持续性局灶性脑缺血.在脑缺血前30min和缺血后60min腹腔注射ONO-1078、尼莫地平或生理盐水(对照).脑缺血24h后,观察神经症状,并测定脑湿重和脑梗死体积.结果ONO-1078(0.01,0.03,0.1mgkg-1)和尼莫地平(0.2 mg*kg-1)减少脑梗死体积;ONO-1078(0.1 mg kg-1)减轻脑湿重,尼莫地平无此作用;ONO-1078和尼莫地平对神经症状无明显作用.结论ONO-1078对持续性局灶性脑缺血有保护作用,提示白三烯拮抗剂可作为急性脑缺血的一种新治疗药.