Effects of arotinoid acid on induction of apoptosis and differentiation and telomerase activity and cell cycle in the HL～60 cell line

Objective To investigate the effects of arotinoid acid (Ro13-7410) on the morphological and functional alterations of leukemia HL-60 cell line and compared with those of RA.Methods Differentiation of HL-60 cells was assessed by morphology and by NBT reduction.Trypan blue exclusion was used to determine viability.Apoptosis was assessed by changes in cell morphology and by measurement of fragmented DNA using the PCD-assay-kit.Telomerase PCR ELISA-kit tested telomerase activity.The cell cycle was analyzed by flow cytometry.Results Incubation of the HL-60 cells with 10(-6)-10(-8) mol/L Ro13-7410 resulted in suppression of cell growth.Apoptotic cells were detected following exposure to 10(-6) mol/LRo13-7410 for 3 hours by measurement of the 'in situ' enzymatic labeling of DNA breaks with biotinylated dUTP.Ultrastructural examination of Ro13-7410-treated samples showed cells with chromatin compaction and cytoplasm condensation and the presence of 'apoptotic bodies'.Cells induced into apoptosis were accompanied by increase of intracellular free Ca[2+].Percentage of HL-60 cells reduced NBT following incubation with Ro13-7410 was lower than with all-trans retinoic acid (RA) (27% vas 85%).Telomerase PCR-ELISA assay showed that HL-60 cells cultured in the absence of inducing agents had significant telomerase activity.Telomerase activity declined gradually after 10(-6) mol/L Ro13-7410 treatment, and changes becoming evident at 1 day.The inhibition of telomerase activity at day 5 of treatment with Ro13-7410 was less effective than with RA.DNA flow cytofluorimetric analysis revealed that Ro13-7410 caused partial cell arrest in the G(2)/M phase after a 2-day treatment and the percentage of cells arrested in the G(2)/M phase increased after 4-days treatment.With RA-treated cells, a reduction in the percentage of cells in the G(2)/M phase was observed after 2-day of treatment.Conclusion Our study shows that Ro13-7410 suppresses HL-60 cells growth mainly via the induction of apoptosis and is less effective than RA in induction differentiation.Ro13-7410 dramatically inhibits telomerase activity during the course of induction and results in G(2)/M arrest within 2 days.These findings suggest that Ro13-7410 is worthy of further study for its effects on leukemic cells.     

人载脂蛋白E基因型测定方法的建立

目的：建立一种准确、简便和经济的适用于大范围测定载脂蛋白Ｅ基因型的方法。方法：自中血中采用ＴＫＭ法提取人基因组ＤＮＡ,ＰＣＲ－ＲＦＬＰ确定载脂蛋白Ｅ的基因型,硝酸银染色聚丙烯酰胺凝胶,若银染效果不佳可用硝酸脱色后重染。结果：ＴＫＭ法获得ＤＮＡ在产量和质量上均能满足ＰＣＲ需求;电泳凝胶经银染可得清晰的ＤＮＡ特异带,据此能准确确定样品载脂蛋白Ｅ的基因基因型;用硝酸溶液脱色后的凝胶经重染仍可得到清晰的图     

青年人胃癌临床病理34例分析

目的　探讨青年人胃癌的临床病理特点。方法　回顾性分析 34例青年胃癌病人的临床表现、病理特点、治疗及预后 ,并与 4 0例中老年胃癌病人进行对比。结果　青年人胃癌与中老年人胃癌的临床表现相似 (P >0 .1) ,诊断常被延误 (P <0 .0 5)。其病理类型以未分化癌及低分化腺癌多见 ( 79.4 % ) ,手术切除率低( 4 1.2 % ) ,预后差 ( 5年生存率 8.8% ) ,与中老年组比较P均 <0 .0 1。结论　青年人胃癌病情进展快 ,转移早 ,改善预后的关键是早诊断 ,早治疗。     

医院物资管理与计算机网络

本文通过对医院物资管理特点的分析,总结出适用于医院的"三级分层体系"物资管理模式及办法,并对本院应用该模式建立的物资管理系统的工作原理、实现细节及特点作了较详尽的论述.     

子宫内膜异位症癌抗原(CA125)检测及其临床意义

目的：探讨子宫内膜异位症与ＣＡ１２５有无相关性、提高临床子宫内膜异位症诊断雍诊断最佳途径。方法：用放射免疫测定法（ＲＩＡ）检测７９例子宫内膜异位症、７０例子宫肌瘤、６４例子宫颈癌、８０名正常育龄女性为对照。结果：子宫内膜异位症、子宫肌瘤、子宫颈癌、正常对照组阳性率分别是７９．７５％、８．５７％、１７．１９％、０．００％。前者显著高于后三者（Ｐ〈０．０１）。结论：ＣＡ１２５检测为临床诊断子宫内膜异位     

重度蒸汽吸入性损伤犬伤后肿瘤坏死因子水平的改变及其意义

目的研究蒸汽吸人性损伤犬伤后血浆肿瘤坏死因子水平的改变及其与吸入性损伤呼吸循环功能受损程度的关系.方法取犬15条,以蒸汽致重度吸入性损伤,分别于伤前、伤后1h、2h、3h、4h观察有呼气相气道阻力(RE)、心率(HR)、心输出量(CO)、动脉血氧分压(PaO2)、血浆TNF水平;伤后4h致死动物,取肺做病理检查.结果伤后1hTNF、RE升高,HR、CO、PaO2下降;TNF与RE正相关(r=O.965,P<O.01),与CO负相关(r=-0.824,P<O.05).结论严重蒸汽吸入性损伤激发TNF分泌,这是诱发肺损伤及循环系统甚至全身器官功能障碍的重要原因.     

消抗安胎口服液慢性毒性作用的实验研究

目的 观察消抗安胎口服液长期,大剂量使用对大鼠的慢性毒性作用。方法 血液生化分析法。结果 实验大鼠的整体状态,肝功能,肾功能,血糖等血液生化指标的测定及主要敏感脏器重量与对照组相比均无显著性差异。结论ＣＸＬ安全,无毒副作用,临床应用可靠。     

强的松龙.葡聚糖连接物在大鼠胃肠道内容物中的水解

观察强的松龙．葡聚糖连接物的结肠定向释放特性。方法通过将所合成的强的松龙．葡聚糖连接珠与大鼠胃肠道不同部位内容物稀释液一起孵育,观察强的松龙的释放情况。结果在１６０ｍｉｎ的卵育过程中,强的松龙．葡聚糖连接物的在胃肠道上部内容物中水解释放出少量强的松龙及强的椴龙琥珀酸半酯,最在释放量小于３μｍｏｌ．Ｌ＾－１;而在胃肠道下部内容物中水解释放出大量强的松龙及强的松龙琥珀酸半酯最大释放量为１４μｍｏｌ．Ｌ     

肾综合征出血热患者血液透析前后的血液流变性及甲襞微循环变化

目的 探讨肾综合征出血热（ＨＦＲＳ）合并争性肾功衰竭（ＡＲＦ）患者血液透析（ＨＤ）前后的血液流变性及甲臂微循环的变化规律。方法 采用瑞曲Ｇａｍｂｒｏ公司生产的ＡＫ－１０型血液透析机治疗患者４５型,血液流变学及甲臂微循环指标分别采用成都仪器厂的ＮＸＥ－１型锥板式粘度计和徐州光学仪器厂的ＭＸ－７５３Ｂ微循环显微镜检测,所得数据按田牛氏综合定量评价方法,计算综合加权积分值。结果 ＨＤ前后患者血中ＢＵＮ,