高压液相色谱纯化肾综合征出血热病毒血凝素及其性状分析

用吐温８０－乙醚（ＴＥ）法、蔗糖－丙酮（ＳＡ）法、丙酮－乙醚（ＡＥ）法分别从肾综合征出血热病毒（ＨＦＲＳＶ）感染的Ｖｅｒｏ－Ｅ６细胞培养和乳小白鼠脑组织中制备病毒血凝素（ＨＡＮ），定量对比证明其制备效果，结果无明显差异。粗制ＨＡＮ经高压液相色谱（ＥＰＬＣ）纯化，有４个洗脱峰，血凝活性物质存在于峰１。纯化ＨＡＮ在ＳＤＳ－ＰＡＧＥ中呈单一区带，分子量５６．６ＫＤ，ＨＡＮ相对含量７９．６％。纯化ＨＡＮ在蔗糖密度梯度液中有一条１．１５～１．１６ｇ／ｃｍ３的沉淀，粗制ＨＡＮ有３条沉淀。电镜观察纯化ＨＡＮ中为大小相等的球状颗粒。粗制ＨＡＮ的高密度沉淀中可见到病样颗粒。对几种常用消毒剂、氧化剂、去垢剂对ＨＡＮ的灭活作用做了实验对比观察。     

PHA RMA COKINETICS OF CUPRIC－BIS（SALICYLALDEHYDE－2－FURA NTHIOCA RBOXY－HYDRAZONATE） DICHLORIDE（CSFTCH） IN RABBITS

ＰＨＡＲＭＡＣＯＫＩＮＥＴＩＣＳＯＦＣＵＰＲＩＣ－ＢＩＳ（ＳＡＬＩＣＹＬＡＬＤＥＨＹＤＥ－２－ＦＵＲＡＮＴＨＩＯＣＡＲＢＯＸＹ－ＨＹＤＲＡＺＯＮＡＴＥ）ＤＩＣＨＬＯＲＩＤＥ（ＣＳＦＴＣＨ）ＩＮＲＡＢＢＩＴＳ￥ＧａｏＹｕｎｓｈｅｎｇ；ＺｈｕＹｕｙｕｎ（...     

T3期胃癌CD34与新生血管形成及淋巴结转移的关系

目的研究T3期胃癌CD34与胃癌新生血管形成及淋巴结转移的关系.方法随机选取胃癌手术标本41例,其中T3N0M020例,T3N1M021例,分别进行特异性抗体免疫组化染色,并采用Image Pro Plus 5.0图像软件分析数据,计算胃癌组织CD34微血管密度(MVD)和其他相关抗体(CD44、Ⅳ型胶原、层黏蛋白)的表达,并进行统计学分析.结果CD34 MVD计数(CD34表达强度),在T3N0M0和T3N1 M0肿瘤组分别为43.10±18.22和56.24±28.36,两组比较有显著差异(P＜0.05);CD44、Ⅳ型胶原、层黏连蛋白的表达强度,T3N0M0和T3N1M0肿瘤组比较无显著差异(P＞0.05).结论CD34与T3期胃癌组织新生血管形成及淋巴结转移的关系密切,可作为诊断T3期胃癌淋巴结转移的参考指标.     

An alkylpolyglucoside surfactant as a prospective pharmaceutical excipient for topical formulations: The influence of oil polarity on the colloidal structure and hydrocortisone in vitro/in vivo permeation

There is a growing need for research into new skin- and environment-friendly surfactants. This paper focuses on a natural surfactant of an alkylpolyglucoside type, which can form both thermotropic and lyotropic liquid-crystalline phases. The aim of this study was to relate some physicochemical properties (characterised by polarisation and transmission electron microscopy, thermal analysis and rheology) of the three formulations based on cetearyl glucoside and cetearyl alcohol, to the results of in vitro and in vivo bioavailability of hydrocortisone (HC). The three formulations contained oils of different polarity (medium chain triglycerides: MG, isopropyl myristate: IPM and light liquid paraffin: LP), respectively. In vitro permeation was followed through the artificial skin constructs (ASC), while the parameters measured in vivo were erythema index: EI (using instrumental human skin blanching assay), transepidermal water loss (TEWL) and stratum corneum hydration (SCH). The vehicles based on cetearyl glucoside and cetearyl alcohol showed a complex colloidal structure of lamellar liquid-crystalline and lamellar gel-crystalline type, depending on oil polarity. Rheological profile of the vehicle was directly related to the in vitro profile of the HC permeation. In vivo results suggested that the vehicle with MG retarded the HC permeation, whereas less polar IPM and non-polar LP enhanced it. It is suggested that the enhancement is achieved either by a direct interaction with lipid lamellae of the SC or indirectly by improving skin hydration.

There were no adverse effects during in vivo study, which indicates a good safety profile of this alkylpolyglucoside surfactant.     

国产注射用盐酸瑞芬太尼有效性和安全性的评价

目的 采用随机、对照、双盲、多中心的Ⅱ期临床试验,评价国产注射用盐酸瑞芬太尼的有效性和安全性。方法201名受试者分成两组:对照组使用静脉芬太尼(2.5μkg诱导,0.03μg·kg-1·min-1维持)复合吸入66％氧化亚氮麻醉,试验组使用静脉瑞芬太尼(2μg/kg诱导,0.2μ·kg-1·min-1维持)复合吸入66％氧化亚氮麻醉。药物有效性的观察指标有:手术刺激时的应激反应,如血压、心率、流泪、麻醉质量。安全性的观察指标有:血压和心率、麻黄碱、阿托品、纳洛酮、乌拉地尔的使用量、手术失血量、心电图变化、术前和术后48 h内血中ALT、AST、肌酐、尿素氮、停止麻醉到可以拔除气管导管的时间、拔除气管导管前的PETCO2或PaCO2、停止麻醉(关闭氧化亚氮)后呼唤名字可以睁眼时间、术后送往麻醉恢复室或ICU情况以及不良事件。结果 瑞芬太尼与芬太尼在本试验剂量下,药效作用相似,但镇痛作用瑞芬太尼强于芬太尼,停止输注后其作用消退快于芬太尼。结论 国产瑞芬太尼用于全麻可产生良好的镇痛作用,且具有与芬太尼相同的安全性。     

高效液相色谱法检测血中表阿霉素的研究

用ＺｏｒｂａｘＣ－８柱成功地分离了阿霉素、表阿霉素及其代谢产物。在此基础上建立了用阿霉素作内标物定量测定表阿霉素的分析方法，其最低检测限为２ｎｇ／ｍｌ，线性范围１０－３００ｎｇ／ｍｌ。     

Magnetic resonance elastography of the lung: technical feasibility.

Magnetic resonance elastography (MRE) is a phase-contrast technique that can spatially map shear stiffness within tissue-like materials. To date, however, MRE of the lung has been too technically challenging-primarily because of signal-to-noise ratio (SNR) limitations and phase instability. We describe an approach in which shear wave propagation is not encoded into the phase of the MR signal of a material, but rather from the signal arising from a polarized noble gas encapsulated within. To determine the feasibility of the approach, three experiments were performed. First, to establish whether shear wave propagation within lung parenchyma can be visualized with phase-contrast MR techniques, MRE was performed on excised porcine lungs inflated with room air. Second, a phantom consisting of open-cell foam filled with thermally polarized (3)He gas was imaged with MRE to determine whether shear wave propagation can be encoded by the gas. Third, preliminary evidence of the feasibility of MRE in vivo was obtained by using a longitudinal driver on the chest of a normal volunteer to generate shear waves in the lung. The results suggest that MRE in combination with hyperpolarized noble gases is potentially useful for noninvasively assessing the regional elastic properties of lung parenchyma, and merits further investigation.     

高效液相色谱法测定硫酸奈替米星注射液的含量

目的采用高效液相色谱法测定硫酸奈替米星及注射液的含量。方法以μ-Diamonsil—C18为分析柱，流动相为1．5％的磷酸二氢钾-乙睛，流速为1．0ml／min，检测渡长为205nm。含量测定用峰面积外标法。结果硫酸奈替米星在0．1—1．6mg／ml浓度范围内呈现良好线性关系，r=0．9998．平均回收率为99．5％，RSD=0．4％（n=9）。结论本方法操作简便、快速，结果准确可靠，重现性好，均能很好地满足质量控制的要求，为开辟氨基糖苷类抗生素含量测定的仪器提供了一定借鉴。     

盐酸齐拉西酮在中国健康志愿者中的药代动力学研究

目的评价国产盐酸齐拉西酮胶囊的人体药代动力学特点;初步评价国产盐酸齐拉西酮胶囊的安全性。方法采用HPLC法测定血浆中齐拉西酮浓度。10位男性健康受试者进食时单剂量口服40mg盐酸齐拉西酮胶囊。于服药前及服药后0.5、1、2、3、4、5、6、8、10、12、24、36、48小时采集5m l血样。抗凝处理取血浆,-20℃保存,用于血药浓度的测定。安全性评价包括体检、实验室检查(心电图、血常规、生化常规及尿常规等)及不良事件的记录。结果主要药动学参数:Cm ax为(175.0±63.73)ng/m l;Tm ax为(3.80±1.32)h;MRT为(9.37±1.53)h;t1/2为(6.10±1.65)h;Ka为0.1831±0.0708/h;Kel为0.1219±0.0349/h;Vd为(685.3±325.4)L;C l为(83.30±34.50)L/h;AUC0→t为(1312±261.3)ng/m l/h,AUC0→∝为(1339±261.1)ng/m l/h。药物不良事件主要为嗜睡、口干、头昏、静坐不能、体位性低血压等,程度多为轻至中度,均能在短时间内缓解。结论研究结果显示了国产盐酸齐拉西酮在中国人中药代动力学特点,单剂量口服胶囊40mg是安全的。     

Site-specific biotinylation

We have developed an expeditious method for the incorporation of the biotinylaminocaproyl moiety on the ε-amino group of a lysine residue within a peptide chain in a site-specific manner. Using t-Boc chemistry for the solid phase synthesis approach and a base labile, acid stable protecting group (Fmoc-) for the ε-amino group of the target lysine, we prepared fully protected resin bound peptides which are site-specifically biotinylated. Following HF cleavage, the uniquely biotinylated peptides were obtained in a high degree of purity. Using this approach, a number of biotinylaminocaproyllysyl derivatives of a monocyclic Endothelin-1 analog were prepared. Synthesis of selected bicyclic analogs of high affinity monocycles led to the preparation of the bicyclic [Nle⁷]ET-1 analog containing ε-biotinylaminocaproyllysine at position-9. This peptide, with K_d= 0.08 nM, has 1000-fold higher affinity for the ET_A receptor than the commercially available N_α-biotinylated Endothelin-1. The general utility of this biotinylation methodology was demonstrated by the synthesis of a site-specifically biotinylated PTH analog which contained several side chain functionalized amino acid residues in its sequence. The synthetic method reported here is convergent in that it allows the facile variation of the length of the spacer and also offers the potential to introduce in a site specific manner other groups such as affinity labels and fluorescent tags.