山羊角提取物中焦谷氨酸含量测定研究

目的:对山羊角提取物中的焦谷氨酸进行含量测定研究。方法:通过氨基酸自动分析仪及傅立叶变换离子回旋共振质谱确认山羊角提取物中含有焦谷氨酸,并建立专属高效液相色谱方法对焦谷氨酸进行含量检测。色谱条件为:色谱柱为Sion-chrom ODS-BP(200 mm×4.6 mm,5μm),流动相为乙腈-3.5 mmo.lL-1磷酸氢二钠缓冲液(1∶99),调pH=3,流速为1.0mL.m in-1,检测波长205 nm,柱温27℃。结果:高分辨质谱有m/z128离子峰,并且检测出该批山羊角提取物中含有焦谷氨酸7.65%。结论:所建立的方法可快速、稳定地检测山羊角提取物中的焦谷氨酸,从而有效提高山羊角提取物的检测标准。     

2017—2019年河南中医药大学第一附属医院抗肿瘤中药制剂使用情况分析

碳点是一种具有优异荧光性质的新兴纳米材料。相比于传统的有机染料和半导体量子点,碳点具有毒性低和生物相容性好等优点。目前,碳点在分析检测、荧光成像、药物运载等诸多领域有着广泛的应用。鹿茸是一味具有多种药效的传统名贵中药,也是罕见的具备再生能力的哺乳动物器官。鹿茸的生物学特性和药效与其化学成分有着密切联系。简要综述了碳点在荧光检测、荧光成像以及光诊疗方面的应用进展,对碳点应用于鹿茸生物学特性及其化学成分分析研究的可行性进行了探讨。     

复方水牛角提取物镇痛、抗炎作用的实验研究

目的:研究复方水牛角水提取物和醇提取物对尿酸钠所致大鼠急性痛风性关节炎(AGA)、冰醋酸致小鼠疼痛及二甲苯致小鼠耳壳炎症的作用.方法:采用2.5%尿酸钠溶液造成大鼠AGA模型,以0.6%冰醋酸溶液致小鼠疼痛扭体模型,以二甲苯造成小鼠耳壳急性炎症模型.分别以大鼠的踝关节肿胀度、血清尿酸含量,小鼠的扭体次数和耳廓肿胀度为指标,测定复方水牛角水提取物和醇提取物的镇痛、抗炎活性.结果:复方水牛角水提取物和醇提取物对尿酸钠所致AGA大鼠踝关节肿胀有明显抑制作用,在造模24 h时模型对照组关节肿胀率为(64.49±9.48)%,复方水牛角水提取物和醇提取物高剂量组关节肿胀率分别为(41.95±11.18)%和(42.32±6.85)%(P＜0.01),并能明显降低血尿酸水平.复方水牛角水提取物和醇提取物可减少冰醋酸所致小鼠扭体次数,减轻二甲苯所致小鼠耳廓肿胀程度.结论:复方水牛角提取物具有镇痛、抗炎作用,其机制可能与降低血清中尿酸水平有关.     

The role of the CA3 hippocampal subregion in spatial memory: A process oriented behavioral assessment

Computational models, behavioral data, and electrophysiological data suggest that the CA3 subregion of the hippocampus may support multiple mnemonic processes critical to the formation and subsequent retrieval of spatial memories. Multiple researchers have proposed that the CA3 subregion contains an autoassociative network in which synaptic connections between CA3 neurons that represent different components of a memory are strengthened via recurrent collateral connections. As a result, it has been suggested that the CA3 autoassociative network may support multiple processes including the formation of spatial arbitrary associations, temporary maintenance of spatial working memory, and spatial pattern completion. In addition, the CA3 subregion has been suggested to be involved in spatial pattern separation. The separation of patterns is hypothesized to be accomplished based on the low probability that any two CA3 neurons will receive mossy-fiber input synapses from a similar subset of dentate gyrus cells. The separation of patterns also may be enhanced by competitive inhibition within CA3 and dentate gyrus. This review will focus on the mnemonic processes supported by CA3 neurons and how these processes may facilitate the encoding and retrieval of spatial information. Although there is growing evidence indicating that the hippocampus plays a role in the processing of nonspatial information as well, the scope of the present review will focus on the role of the CA3 subregion in spatial memory.     

两种鹿鞭水提物对顺铂诱导小鼠急性肾损伤的保护作用

目的研究和比较两种鹿鞭水提物对顺铂(CDDP)诱导小鼠急性肾损伤保护作用,并探讨可能机制。方法 64只雄性小鼠随机均等分为空白对照组、CDDP模型组、新西兰马鹿鞭和梅花鹿鞭水提物高、中、低剂量(100μg/g、200μg/g、400μg/g)+CDDP保护组;各鹿鞭保护组连续灌胃7天,在第5天给药1 h后(除空白对照组)小鼠均腹腔注射CDDP(20μg/g)诱导急性肾损伤。造模48 h后,测定小鼠血清和肾组织中肾功能指标水平和观察HE染色肾脏组织病理学切片变化。结果与CDDP模型组比较,两种鹿鞭水提物各剂量保护组均可改善肾功能指标水平和肾损伤状况,梅花鹿鞭较新西兰马鹿鞭效果更佳,其中梅花鹿鞭水提物高剂量保护组效果最为显著:BUN、CRE和MDA显著降低(P0.01),SOD和GSH显著升高(P0.01);明显改善损伤肾脏中肾小管变性和坏死的现象,但未恢复正常水平。结论两种鹿鞭水提物均对顺铂诱导小鼠急性肾损伤有明显保护作用,可能与清除自由基和抗氧化应激作用有密切联系。     

羚羊感冒胶囊中掺杂水牛角粉的鉴别

目的 建立羚羊感冒胶囊中掺杂水牛角粉的检测方法.方法 采用显微鉴别法鉴定其显微特征.结果 羚羊角粉与水牛角粉显微特征差异显著,可用于羚羊感冒胶囊真伪鉴别.结论 该方法简单、易行.     

Patient-derived olfactory mucosa cells but not lung or skin fibroblasts mediate axonal regeneration of retinal ganglion neurons

Ether-a-go-go (ERG) K⁺ channel is a channel of potassium inward rectification. ERG channelopathy may be a cause of sudden unwanted death. The purpose of our study is to assess the effect of antiepileptic drugs on the expression of ERG K⁺ channel in the hippocampus using seizure resistant (SR) and seizure sensitive (SS) gerbils. As compared to controls, in principal neuron of hippocampus ERG immunoreactivity was significantly decreased after administration of AEDs in SS and SR gerbils. In addition, population spike in response to the second stimulus disappeared, thus population spike amplitude ratio was significantly reduced to zero. These findings indicate that AEDs reduce the expression of ERG channel in the hippocampus of the SR and SS gerbils accompanied by the enhancement of paired-pulse inhibition. In addition, the influence of AEDs on ERG expression in the brain may not be relevant to sudden unexpected death in epilepsy.     

羚羊角药材商品中水溶性蛋白质含量测定

目的:建立羚羊角商品药材中水溶性蛋白质含量测定方法。方法:低温水浸渍提取,考马斯亮蓝显色,可见分光光度法测定羚羊角商品药材中水溶性蛋白质的含量。结果:样品中水溶性蛋白质的含量以牛血清蛋白计在21.6～108μg范围内具有良好线性关系,回归方程为Y=0.0075X+0.0046(r=0.9996)。结论:该方法适用于羚羊角商品药材中水溶性蛋白质的含量测定。     

商品鹿茸药材中总磷脂含量测定

目的:建立鹿茸药材中总磷脂含量测定方法,以评价不同商品地鹿茸药材的质量。方法:采用Folch试剂超声提取,钼蓝试剂显色,分光光度法测定。结果:样品中总磷脂含量以磷计的回归方程y=0.0205x+0.0032(r=0.9997),线性范围在2.3～80.5μg,平均回收率为93.01%,RSD=2.2%(n=5)。结论:该方法操作简便,方法学考察结果理想,可作为鹿茸药材质量控制的方法。