维生素E琥珀酸酯对乳腺癌细胞的抑制

维生素E琥珀酸酯(VES)是一种有效的抗肿瘤物质。它能通过多种信号传导途径诱导乳腺癌细胞凋亡,并可与多种化疗药物或三苯氧胺协同抑制乳腺癌细胞生长。同时VES能够增强小鼠免疫系统抗肿瘤能力。     

制备高效液相色谱法精制氢化可的松琥珀酸

目的:研究氢化可的松琥珀酸的制备高效液相色谱精制方法。方法:采用制备高效液相色谱法,色谱柱为 Prep Pak Car-tridge C_(18)(25 mm×100 mm,6μm),以甲醇-水(以三氟醋酸调 pH 3.2)(44:55)为流动相,流速为15 mL·min~(-1),检测波长为242 nm。采用 NMR、MS、IR 光谱法确证化学结构,HPLC 法分析纯度。结果:精制获得氢化可的松琥珀酸的 HPLC 纯度为99.5%。结论:本方法操作简捷,分离效果好,适用于氢化可的松琥珀酸的适量精制以及氢化可的松琥珀酸及其钠盐化学对照品的质量研究。     

穿琥宁注射液中脱水穿心莲内酯琥珀酸半酯的含量测定

目的建立高效液相色谱法（HPLC法）并测定穿琥宁注射液中脱水穿心莲内酯琥珀酸半酯的含量。方法采用C18柱,以0.05%磷酸二氢钾溶液-甲醇（3∶7）为流动相,检测波长为251nm。结果脱水穿心莲内酯琥珀酸半酯质量浓度在2.01～20.05μg/mL范围内与峰面积呈良好的线性关系,平均加样回收率为98.9%,RSD为0.7%。结论HPLC法简便、快速,测定结果准确可靠。     

炎琥宁、复方丹参注射液佐治小婴儿毛细支气管炎疗效观察

目的:探讨炎琥宁、复方丹参注射液佐治小婴儿重症毛细支气管炎的临床疗效.方法:选择住院的重症急性毛细支气管炎患儿80例,随机分为治疗组和对照组各40例,治疗组使用炎琥宁10 mg/(kg·d)、复方丹参2～4 mL/d静脉滴注;对照组采用利巴韦林10～15 mg/(kg·d)静脉滴注,比较治疗后两组疗效.结果:治疗组总有效率90.0%;对照组总有效率70.0%;两组总有效率比较差异有统计学意义(P＜0.05).结论:炎琥宁、复方丹参注射液治疗重症小婴儿毛细支气管炎疗效确切,未见明显不良反应.     

Inhibition of human pterygium fibroblasts by vitamin E succinate

To study the antiproliferation of vitamin E succinate (VES) on pterygium fibroblasts in vitro and to find a potential agent for prevention and treatment of primary and recurrence pterygium. · METHODS: Primary culture and subculture of pterygium fibroblasts were established in vitro, and different concentrations of VES (0, 10 and 20mg/L) were added to subcultured fibroblasts, respectively. Influence of VES on the growth curve of fibroblast was observed at day 2, 4 and 7 after treatment of VES. 3-[4,5-Dimethylthiazolzyl]-2,5-Diphenyl Tetrazolium Bromide (MTT) assay at 490nm was used to evaluate the effect of the cells proliferation. · RESULTS: The addition of VES to culture caused the marked descent of growth curve in comparison with the control group, and the inhibiting rate of 10 and 20mg/L of VES was 33.2% and 46.7%, 67.9% and 76.8%, 81.7% and 89.3% at day 2, 4 and 7, respectively. VES could obviously inhibit the fibroblast proliferation in dose-dependent manner by MTT assay. · CONCLUSION: VES can significantly inhibit the proliferation of pterygium fibroblast in vitro.     

Simultaneous Derivative Spectrophotometric Analysis of Doxylamine Succinate, Pyridoxine Hydrochloride and Folic Acid in Combined Dosage Forms

Two UV spectrophotometric methods have been developed, based on first derivative spectrophotometry for simultaneous estimation of doxylamine succinate, pyridoxine hydrochloride, and folic acid in tablet formulations. In method I, the concentrations of these drugs were determined by using linear regression equation. Method II is also based on first derivative spectrophotometry however simultaneous equations (Vierdot''s method) were derived on derivative spectra. The first derivative amplitudes at 270.0, 332.8 and 309.2 nm were utilized for simultaneous estimation of these drugs respectively by both methods. In both the methods, linearity was obtained in the concentration range 2.5-50 μg/ml, 1-40 μg/ml and 1-30 μg/ml for doxylamine succinate, pyridoxine hydrochloride, and folic acid respectively. The developed methods show best results in terms of linearity, accuracy, precision, LOD, LOQ and ruggedness for standard laboratory mixtures of pure drugs and marketed formulations. The common excipients and additives did not interfere in their determinations.     

高效液相色谱法测定注射用炎琥宁的含量

目的建立测定注射用炎琥宁的含量的高效液相色谱方法。方法 采用Diamonsil^TM C18柱（4．6mm×200mm，5μm），甲醇-0．05mol·L^-1。磷酸二氢钾溶液[用磷酸调pH值至（2．5±0．05）]（68：32）为流动相，流速：1．0mL·min^-1，检测波长为251nm。结果炎琥宁在0．04312～0．1724mg·mL^-1峰面积与其测定浓度呈良好线性关系（r＝O．9999），平均回收率为99．9％，重复性试验RSD为0．49％（n＝6）。结论本法准确、简便、快速，可用于注射用炎琥宁的含量测定。     

蔗糖铁联合促红细胞生成素治疗肾性贫血疗效观察

目的观察静脉铁和口服铁在治疗肾性贫血中的疗效和安全性。方法50例血液透析患者随机分为两组：静脉组给予静脉铁（蔗糖铁）100 mg/次,每周2次。口服组给予口服铁（硫酸亚铁）300 mg/天。观察治疗后4周、8周、12周血红蛋白（Hb）、红细胞压积（Hct）、铁蛋白（SF）和转铁蛋白饱和度（TSAT）等的变化,并观察治疗达标后促红细胞生成素（EPO）维持量及不良反应发生情况。结果静脉组较口服组Hb、Hct、SF、TSAT上升速度快,疗效肯定,不良反应发生率低,治疗达标后EPO维持量减少。结论口服铁治疗贫血效果差,不能达到纠正贫血的理想目标,且不良反应相对多,蔗糖铁治疗肾性贫血疗效肯定,不良反应发生率低,可作为血液透析患者的长期补铁方案。     

注射用炎琥宁与头孢替唑钠配伍稳定性研究

目的 考察炎琥宁注射液与头孢替唑钠配伍稳定性.方法 采用紫外分光光度法,考察不同时间配伍液中两种药物的含量变化及配伍液的不溶性微粒检测,并观察配伍液外观和pH的变化.结果 在室温(25℃)下,2 h内配伍液澄明,炎琥宁注射液及头孢替唑钠含量及pH值基本无改变,配伍液色泽无变化.结论 炎琥宁注射液与头孢替唑钠配伍2 h内是稳定的.     

Cellular energetics and glutathione status in NRK-52E cells: toxicological implications

Cellular energetics and redox status were evaluated in NRK-52E cells, a stable cell line derived from rat proximal tubules. To assess toxicological implications of these properties, susceptibility to apoptosis induced by S-(1,2-dichlorovinyl)-L-cysteine (DCVC), a well-known mitochondrial and renal cytotoxicant, was studied. Cells exhibited high activities of several glutathione (GSH)-dependent enzymes, including gamma-glutamylcysteine synthetase, GSH peroxidase, glutathione disulfide reductase, and GSH S-transferase, but very low activities of gamma-glutamyltransferase and alkaline phosphatase, consistent with a low content of brush-border microvilli. Uptake and total cellular accumulation of [14C]alpha-methylglucose was significantly higher when cells were exposed at the basolateral as compared to the brush-border membrane. Similarly, uptake of GSH was nearly 2-fold higher across the basolateral than the brush-border membrane. High activities of (Na(+)+K(+))-ATPase and malic dehydrogenase, but low activities of other mitochondrial enzymes, respiration, and transport of GSH and dicarboxylates into mitochondria were observed. Examination of mitochondrial density by confocal microscopy, using a fluorescent marker (MitoTracker Orange), indicated that NRK-52E cells contain a much lower content of mitochondria than rat renal proximal tubules in vivo. Incubation of cells with DCVC caused time- and concentration-dependent ATP depletion that was largely dependent on transport and bioactivation, as observed in the rat, on induction of apoptosis, and on morphological damage. Comparison with primary cultures of rat and human proximal tubular cells suggests that the NRK-52E cells are modestly less sensitive to DCVC. In most respects, however, NRK-52E cells exhibited functions similar to those of the rat renal proximal tubule in vivo.