内皮素-1前体基因反义寡核苷酸对正常和高血压大鼠血流动力学的影响

我们筛选出针对内皮素－１（ＥＴ－１）前体基因反义硫代寡核苷酸片断（ＥＴＡＳＯＤＮ）,已证明ＥＴＡＳＯＤＮ能显著抑制培养内皮细胞ＥＴ－１的生成,本应用该片断,对下沉和腹主动脉狭窄－高盐摄入型高血压大鼠侧脑室进行注射,记录注射前后血流动力学指标、注射后侧脑室周围组织中ＥＴ－１的含量及分布,ＥＴＡＳＯＤＮ对正常和高血压大鼠的影响,发现高血压大鼠脑干ＥＴ－１含量明显高于正常大鼠;ＥＴＡＳＯＤＮ能降低高血压     

Use of a micro-expanded bed containing immobilised lysozyme for cell disruption in flow injection analysis

A method for cell disruption in Flow Injection Analysis (FIA) systems has been developed. The principle involves on-line cell disruption by means of immobilised lysozyme followed by an ultrasonic treatment. In order to avoid flow problems in the analytical system, the lysozyme was immobilised to Streamline^reg that was used in an expanded bed in the flow system. Samples of suspensions of Micrococcus lysodeikticus were treated and the success of the treatment was evaluated in terms of released protein and as a decrease in the optical density at 450 nm. The new technology offers a powerful tool in flow injection analyses for quantification of intracellular compounds. The concept of integration, i.e. combining cell disruption with handling of cell debris and assay procedure in one continuous flow process facilitates its use and increases the probability of reaching reproducible and reliable results.     

A low temperature microbial biosensor using immobilised psychrophilic bacteria

A psychrophilic bacteria, Deinococcus radiodurans, was used to construct a biosensor to be used in a flow injection system. The transducer used was an O₂ electrode. The response of this cell-based electrode was studied towards a number of sugars. The temperature dependence of the electrode response correlated well with the behavior of the cells. Thus, the optimum temperature for measurement of glucose (0.55 mM) was about +5°C. Since the organism used is psychrophilic, a response time at this low temperature is similar to what is achieved with mesophilic organisms at room temperature. This is the first biosensor constructed using a psychrophilic microorganism.     

Determination of procaine hydrochloride using flow injection inhibitory chemiluminescence

A new flow injection chemiluminescent method has been developed for the determination of procaine hydrochloride, based on the inhibition of the chemiluminescence reaction of luminol–hydrogen peroxide by procaine hydrochloride. The influence of several surfactants and β‐cyclodextrin on the chemiluminescence intensity were studied. It was found that β‐cyclodextrin enhanced the decrease in chemiluminescence intensity. The method is simple, convenient and sensitive, with a detection limit (3 σ) of 0.08 µg/mL. The decreased chemiluminescence intensity is linear, with the concentration of procaine hydrochloride in the range 0.2–100.0 µg/mL and 100.0–400.0 µg/mL. The relative standard deviation for 10 repeated measurements were 4.5% and 3.4% for 1.0 and 20.0 µg/mL procaine hydrochloride, respectively. The method has been successfully applied to the determination of procaine hydrochloride in injection solutions of this drug. Copyright © 2003 John Wiley & Sons, Ltd.     

Determination of parathion residues in rice samples using a flow injection chemiluminescence method

A sensitive ?ow injection chemiluminescence method is described for the determination of parathion pesticide, based upon its direct chemiluminescence reaction with luminol and hydrogen peroxide in the presence of non‐ionic surfactant polyethylene glycol 400. Under the selected experimental conditions, the concentration of parathion is proportional to the CL intensity in the range 0.02–1.0 mg/L. The detection limit was 0.008 mg/L and the relative standard deviation was 2.8% for 0.2 mg/L parathion solution (n = 11). This method was successfully applied to the determination of parathion residue in rice samples. Copyright © 2003 John Wiley & Sons, Ltd.     

Hydrazine-induced post-chemiluminescence phenomenon of permanganate-luminol reaction and its applications.

The post-chemiluminescence phenomenon arising from the permanganate-luminol reaction induced by hydrazine and isoniazid was investigated. When hydrazine or isoniazid was injected into the mixture after the end of the reaction of permanganate with alkaline luminol, a new chemiluminescence (CL) reaction was initiated and strong CL signal was detected. A possible CL mechanism is suggested, based upon the studies of the kinetic characteristics of the CL reaction, the UV-visible spectra, the CL spectra and some other experiments. The present reactions allow the determination of 0.1-10.0 mg/L hydrazine and 0.02-1.0 mg/L isoniazid, with detection limits of 0.03 mg/L and 0.006 mg/L, respectively. The method was applied to the determination of isoniazid in pharmaceutical preparations.     

Flow injection assays with chemiluminescence and bioluminescence detection — A review

This paper reviews publicaions that combine the technique of flow injection (FI) with chemiluminescence (CL) and bioluminescence (BL) detection, from the earliest papers in 1979/80 to mid-1992, and refers exclusively to reactions occurring in solution. Airsegmented systems and liquid chromatography with CL detection are not considered unless FI has been used to pre-optimize the system. The applications have been categorized in terms of the type of CL reaction; there are separate entries for luminol, peroxyoxalate, other CL reactions and BL reactions. Each of the four sections includes a table of applications that lists the analyte, the nature of the reaction, the sample matrix and the limit of detection.     

鼠神经生长因子联合神经节苷脂钠注射液对癫痫大鼠认知功能、血清NSE及海马神经元的影响及机制分析

摘要 目的：探讨鼠神经生长因子联合神经节苷脂钠注射液对癫痫大鼠认知功能、血清NSE及海马神经元的影响。方法：选择SD雄性大鼠50只,随机分为5组,包括空白组、模型组、A组、B组、C组。空白组大鼠腹腔注射等容量的生理盐水,其余组使用腹腔注射氯化锂-毛果芸香碱的方法建立癫痫大鼠模型。空白组、模型组大鼠用微量注射器注射20 μL无菌生理盐水,A组同时间点给大鼠腹腔注射2000 AU/kg鼠神经生长因子;B组同时间点给大鼠腹腔注射20 μL神经节苷脂钠;C组给大鼠腹腔注射2000 AU/kg鼠神经生长因子联合20 ?滋L神经节苷脂钠。进行Morris水迷宫试验、空间探索试验,检测血清NSE水平与海马神经组织的神经元,检测血清NSE水平、海马神经组织的神经元存活率及核因子kB p56、TLR-4、MyD88蛋白水平。结果：模型组第1、2、3、4、5 d时的游泳总距离、逃避潜伏期较其他四组高,空白组较A组、B组、C组高,B组、A组较C组高（P<0.05）,B组、A组对比无差异（P>0.05）;模型组的平台穿越次数、探索有效时间比率较空白组、A组、B组、C组低,空白组较A组、B组、C组低,B组、A组较C组低（P<0.05）,B组、A组对比无差异（P>0.05）;模型组的血清NSE水平、核因子kB p56、TLR-4、MyD88蛋白水平较空白组、A组、B组、C组低,海马组织中神经元存活率较高,空白组较A组、B组、C组低,海马组织中神经元存活率较高,B组、A组较C组低,海马组织中神经元存活率较高（P<0.05）,B组、A组的NSE水平、海马组织中神经元存活率、核因子kB p56、TLR-4、MyD88蛋白水平对比无差异（P>0.05）。结论：鼠神经生长因子联合神经节苷脂钠注射液可改善癫痫大鼠的认知功能,减轻海马组织炎症反应,可能与其可降低血清NSE及海马组织核因子kB p56、TLR-4、MyD88水平有关。     

丹参川芎嗪注射液联合依达拉奉治疗急性缺血性脑卒中合并高血压的疗效及对神经功能、血脂和BDNF、GAL3的影响

摘要 目的：探讨丹参川芎嗪注射液联合依达拉奉治疗急性缺血性脑卒中合并高血压的疗效及对神经功能、血脂和脑源性神经营养因子（BDNF）、半乳糖凝集素3（GAL3）的影响。方法：选择我院自2020年1月至2022年1月接诊的136例急性缺血性脑卒中合并高血压患者作为研究对象,分为对照组和观察组,各68例。两组均在常规治疗的基础上,对照组加用依达拉奉治疗,观察组加用丹参川芎嗪注射液联合依达拉奉治疗。比较两组治疗前后的脑血流动力学指标、美国国立卫生研究院卒中量表（NIHSS）评分、改良Barthel（BMI）评分、血脂、血清BDNF、GAL3表达水平,综合评价临床疗效,记录不良反应发生情况。结果：观察组治疗后峰流速（Vp）、平均流速（Vm）均大于对照组,峰流速对称性差值（DVp）、平均流速对称性差值（DVm）均小于对照组（P<0.05）;观察组治疗后NIHSS评分较对照组低,BMI评分较对照组高（P<0.05）;观察组治疗后血脂水平较对照组低（P<0.05）;观察组治疗后血清BDNF表达水平高于对照组,GAL3表达水平低于对照组（P<0.05）;观察组临床总显效率较对照组高（P<0.05）;两组不良反应发生率比较,差异不显著（P>0.05）。结论：丹参川芎嗪注射液联合依达拉奉治疗急性缺血性脑卒中合并高血压的疗效确切,能够有效改善神经功能,调节血脂代谢和升高BDNF水平、降低GAL3水平,且安全性较好,值得临床予以重视。     

复方苦参注射液腔内灌注治疗对恶性胸腔积液患者机体免疫功能及肿瘤标志物水平的影响

摘要 目的：探讨复方苦参注射液腔内灌注治疗对恶性胸腔积液患者机体免疫功能及肿瘤标志物水平的影响。方法：选取河北北方学院附属第一医院2020年12月到2022年12月期间收治的52例恶性胸腔积液患者,将每位患者随机进行编号,获得1～52个编号,按照奇偶法将患者分为对照组（n=26）和观察组（n=26）。对照组采用顺铂腔内灌注治疗,观察组在对照组的基础上联用复方苦参注射液腔内灌注治疗,比较两组患者的治疗效果、T淋巴细胞亚群（CD3⁺、CD4⁺、CD4⁺/CD8⁺）、癌胚抗原（CEA）、糖类抗原125（CA125）、生活质量改善率以及毒副反应。结果：观察组治疗总有效率73.08%高于对照组的42.31%（P＜0.05）。治疗后观察组的CD3⁺、CD4⁺、CD4⁺/CD8⁺与治疗前比较明显升高,且高于对照组（P<0.05）。治疗后两组患者的血清CEA、CA125水平与治疗前比较均明显降低,且观察组低于对照组（P<0.05）。观察组生活质量改善率76.92%高于对照组46.15%（P<0.05）。观察组的骨髓抑制、胃肠道反应明显轻于对照组（P<0.05）。结论：复方苦参注射液腔内灌注治疗对恶性胸腔积液患者具有较好的疗效,且可以改善患者机体免疫功能及生活质量,降低血清肿瘤标志物水平和毒副反应。