美丽芍药根中黄酮类成分及其生物活性

目的 研究美丽芍药PaeoniamaireiLevl.中黄酮类成分及其生物活性.方法 美丽芍药根70％乙醇提取物的分析采用D101、硅胶、Rp-18、Sephadex LH-20进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构.HEK293模型测试其体外激动褪黑素受体1活性.结果 从中分离得到9个化合物,分别鉴...     

5种当归类药材多糖量的比较

目的比较中国当归Angelica sinensis、日本当归A.acutiloba、韩国当归A.gigas、欧当归Levisticum officinale和圆当归A.archangelica药材中多糖的量,评价这5种当归类药材的质量。方法从不同国家收集了46份当归类药材样品,采用优化的3,5-二硝基水杨酸法测定多糖量;比较不同当归药材之间多糖量的差异。结果这5种药材中多糖的量差异很大,其平均量从高到低的顺序为圆当归(162.5 mg/g)、欧当归(142.3 mg/g)、日本当归(126.8 mg/g)、韩国当归(81.38 mg/g)、中国当归(80.75 mg/g)。从日本、中国和韩国收集的日本当归中多糖量也不同,分别为131.37、184.29、94.98 mg/g。结论建立的3,5-二硝基水杨酸法可准确测定当归类药材中多糖的量;这5种药材中多糖的量不同,其功效也不同,不宜混用。     

牛大力的化学成分研究

目的 研究牛大力Millettia speciosa的化学成分.方法 应用多种色谱技术对牛大力进行分离纯化,并通过光谱方法鉴定化合物的结构. 结果从牛大力乙醇提取物的醋酸乙酯部位中分离得到13个化合物,分别鉴定为(-)-高丽槐素(Ⅰ)、芒柄花素(Ⅱ)、3,4,2',4'-四羟基查尔酮(Ⅲ)、圆齿火棘酸(pyracrenic acid,Ⅳ)、(-)-丁香脂素(Ⅴ)、dihydrodehydrodiconiferyl alcohol(Ⅵ)、5-羟甲基糠醛(Ⅶ)、α-甲氧基-2,5-呋喃二甲醇(Ⅷ)、2,5-二羟基苯甲酸(Ⅸ)、豆甾醇(Ⅹ)、豆甾醇-3-O-β-D-葡萄糖苷(Ⅺ)、β-谷甾醇(Ⅻ)及胡萝卜苷(ⅩⅢ).结论 化合物Ⅱ～ⅩⅢ均为首次从该植物中分离得到.     

Tolerance to acute compression injury and recovery of nerve function in chronically compressed spinal nerve roots: Experimental study

Chronic compression (10 mm Hg for 1 week) of spinal nerve roots in a dog experimental model has been shown to reduce nerve conduction velocity. Although injured, the compressed nerve roots demonstrated increased resistance to acute compression applied in addition to the chronic compression after 1 week. In the present study reduction of nerve conduction velocity induced by chronic compression recovered when the duration of compression was extended to 1 month. However, the tolerance to additionally applied compression was still present. This study provides important base-line data for continued studies of the basic mechanisms of the development of tolerance to changes in compression pressure levels in chronically compressed nerve roots.     

Post-irradiation lesions of the caudal roots

The article reports on 3 patients suffering from muscular atrophy after radiotherapy of the para-aortal lymph nodes for malignant testicular tumor without any sensory, bladder, or bowel disturbances. By neurophysiological examination, a lesion of the lumbal plexus and the peripheral nerves of the lower extremities were excluded. On EMG-examination there were no giant motor unit potentials, as they can be found in anterior horn cell lesions. Though there were no sensory deficits, a distinct prolongation of latencies and reduction of amplitudes could be found for lumbar dermatomal somatosensory evoked potentials (SSEP) and those after stimulation of some peripheral nerves of the lower extremities.     

The X-pointer: A forgotten anatomical relationship of spinal accessory nerve and great auricular nerve

IntroductionThe preservation of the spinal accessory nerve cannot be overlooked in neck dissection. Injury to the nerve results in shoulder dysfunction and other related morbidities. In this article, we describe a unique constant relationship between spinal accessory nerve and great auricular nerve, at the junction of the anterior and posterior triangles of the neck, eponymously labelled the X- pointer.MethodologyThis was an observational study conducted at a tertiary care cancer centre that runs a comprehensive surgical training program. A 100 cases of modified radical neck dissection performed for oral cavity squamous cell carcinoma from January 2017 to January 2019 in were included. The relationship was analyzed in 100 cases of neck dissection for its constancy.ResultIn all the 100 cases, the X-pointer was demonstrated as a constant anatomical relationship between the spinal accessory nerve and great auricular nerve. The crossing over of the nerve on the undersurface of the sternocleidomastoid muscle is constant and independent of the patient's body proportions.ConclusionsThe relationship between the spinal accessory nerve and great auricular nerve remains constant irrespective of the technique of neck dissection and body habitus of the patient. In our view, this relationship can be used as an additional confirmatory landmark to prevent inadvertent injury to the spinal accessory nerve.     

大剂量黄芪注射液治疗缺血性脑卒中临床分析

目的观察大剂量黄芪注射液和葛根素注射液治疗脑梗死的疗效及安全性.方法采用病例对照研究方法,对105例脑梗死病人采用不同的治疗方法,对其疗效进行分析.分组方案为:对照组使用香丹注射液静脉输注;治疗组采用黄芪注射液和葛根素静脉输注.均以7 d为1个疗程,两组共治疗3个疗程后评定疗效.结果经治疗后两组总有效率对照组为84.00%、治疗组94.55%,两组差别有统计学意义(P＜0.01),且病人无不良反应.结论使用大剂量黄芪、葛根素注射液治疗缺血性脑卒中安全有效,作用平稳.     

7th Meeting on Hypertension and Atherosclerosis

The 7th Meeting on Hypertension and Atherosclerosis was organized in collaboration with the Society of Hypertension and Atherosclerosis and endorsed by the European Society of Hypertension. From basic sciences to clinical aspects, the congress covered the wide spectrum of cardiovascular health, providing a venue for the conversation of scientists from all around the world. At the end of the 5 days, participants had the opportunity discuss the main topics and updates on hypertension and atherosclerosis.     

神经再生素对背根神经节细胞GAP—43和NF—L基因表达的影响

目的：观察中药有效组分神经再生素作用于神经细胞生长过程中,相关基因的表达变化。探讨神经再生素促神经生长的分子生物学机制。方法：采用RT-PCR法,观察神经再生素在促大鼠背根神经节生长过程中（4h,12h,24h),生长相关蛋白43（GAP-43）和神经丝蛋白（NF-L）基因表达的变化。结果：神经再生素可使背根神经节细胞GAP-43和NF-LmRNA物表达量增加。结论：神经再生素可作用于体外培养的神经细胞,使神经生长相关基因表达上调。     

柴胡药材干根DNA提取及RAPD分析

目的 探索一种适用于柴胡药材干根DNA提取的方法,为实现以分子标记方法辨别柴胡药材奠定基础.方法 比较研究了分别用CTAB法、SDS法和高盐低pH法等3种方法提取柴胡样品基因组DNA.柴胡药材干根经过PVP以及TNE缓冲液进行不同的预处理,以CTAB法抽提DNA.以EcoR I/Mse I双酶切琼脂糖凝胶电泳及RAPD扩增检测提取DNA的质量.采用NTSYS-pc软件计算Jaccard遗传相似系数,以非加权配对算术平均数法(UPGMA)建立聚类图.结果 常规DNA提取方法提取药材干根DNA溶液经4℃放置后,黏稠并褐变,严重影响酶切和RAPD扩增.样品预处理优化条件是研磨时加入3%PVP,TNE缓冲液于0℃浸提2次,每次30min.以该优化的预处理方法处理6个柴胡药材干根样品,提取DNA条带清晰,酶切完全,RAPD扩增图谱清晰稳定,共获得有效扩增条带28条,其中多态性条带为20条,占71.43%.聚类分析表明,6个栽培品中,原产地为山西灵丘外地引种(LQWY)和甘肃陇西(LX)、山西灵丘(LQ)和山西方山(FSH)的亲缘关系较近,陕西商洛(SHL)和其他5个栽培品的亲缘关系较远.结论 柴胡药材干根经过预处理后,可采用常规的DNA提取方法抽提DNA,所提DNA适合于酶切、RAPD等分子标记分析.