中性粒细胞对洗涤血小板聚集功能的影响

目的:观察非激活或激活的中性粒细胞(PMN)对洗涤血小板聚集功能的影响。方法:采用Born方法测定血小板聚集功能。结果:非激活的PMN(5×10⁹cells/L)上清液对ADP和花生四烯酸(AA)诱导的血小板聚集具有显著抑制作用,阿司匹林可增强这种抑制作用;肉豆寇佛波醇(fMLP)及血小板活化因子(PAF)激活的PMN悬液或其上清液均能活化血小板聚集,且PMN悬液的诱聚作用比其上清液更强;阿司匹林对fMLP或PAF激活的PMN悬液或其上清液均无明显抑制作用。结论:不同状态(非激活或激活状态)的PMN对正常血小板的反应性表现出完全相反的作用,即非激活的PMN抑制血小板反应性,而激活的PMN则具有促血小板活化聚集作用。     

Groups I,II and III extracellular phospholipases A2: Selective inhibition of group II enzymes by indomethacin but not other NSAIDs

The three types (groups I, II and III) of stable extracellular 14 kDa phospholipase A₂ enzymes differ in their primary amino acid sequences and their properties. It may thus be possible to design low-molecular weight inhibitors targeted to the secretory form of mammalian PLA₂. this enzyme has been implicated in inflammatory disorders. We have studied the inhibition of four distinct PLA₂ enzymes by a range of NSAIDs, using³H-oleate release from prelabelled membranes ofE. coli for assay. The enzymes used were cobra venom PLA₂ (Naja naja, a group I enzyme), bee venom PLA₂ (Apis mellifera, group III), recombinant human synovial PLA₂ (group II) and rat peritoneal PLA₂ (group II). Under the conditions of the³H-oleateE. coli assay, 1 mM concentrations of aspirin, sodium salicylate, paracetamol (acetaminophen), oxphenbutazone, ibuprofen, flurbiprofen and nabumetone failed to inhibit significantly any of the four enzymes. However, indomethacin inhibited all four enzymes, although effects were greatest on the two group II enzymes (rat peritoneal and human synovial PLA₂). Approximate IC₅₀ values were 28 and 35 M, respectively. Inhibition by indomethacin was not time dependent and was greater at micromolar rather than millimolar levels of calcium. We conclude that indomethacin but not the other tested classes of NSAID inhibits the group II PLA₂ enzyme in a selective manner and suggest that this may be relevant both to its clinical spectrum and to the design of novel pharmaceutical leads.     

Regional anaesthesia in patients taking anticoagulant drugs

Many surgical patients are taking drugs that impair normal coagulation, and this causes concern about the risk of perioperative bleeding events. The anaesthetist is particularly concerned about compressive vertebral canal haematomas, which may occur after spinal or epidural anaesthetic techniques. Fortunately, the risk of this complication is very low. The major risk factors are coagulopathy or technical difficulties with the block. There is also concern about perineural haematomas, which may be associated with peripheral nerve blocks. This article attempts to put the risks of these complications into context, with reference to different classes of anticoagulant drugs.     

RP-HPLC法测定复方双嘧达莫缓释片中双嘧达莫与阿司匹林的含量

目的 建立高效液相色谱法测定复方双嘧达莫缓释片的含量测定方法。方法 用ODS—C18柱；流动相以0．02mol／L Na2HPO4缓冲液(20％ H3PO4调节pH3．2)—乙腈—甲醇(67：28：5)；检测波长227nm；流量1．0ml/min.结果 双嘧达莫的线性范围：20．06-401．2μg/ml(r＝0．9995)，平均回收率100．8％，RSD为0．7％；阿司匹林的线性范围：2．892-57.84μg／ml(r＝0．9995)，平均回收率99.94％，RSD为0.3％。结论 本法简便、灵敏、准确。     

HPLC法同时测定赖氨匹林散中阿司匹林和游离水杨酸

目的: 采用HPLC同时测定赖氨匹林散中阿司匹林和游离水杨酸的含量,并对其降解产物水杨酸的含量进行控制.方法: 采用Diamonsil C18 (200 mm×4.6 mm,5 μm)色谱柱,甲醇-H3PO4(0.2%)-乙腈(18∶50∶32)为流动相,流速:1.0 ml·min-1,检测波长为237 nm.结果: 阿司匹林在0.446～2.677 μg·ml-1浓度范围内呈良好的线性关系(r=0.999 8),水杨酸在0.22～2.20 μg·ml-1浓度范围内呈良好的线性关系(r=0.999 8),回收率好;结论: 本法简便、快速、准确专属性强.     

阿司匹林联合银杏叶制剂对老年高脂血症脂质及血流变的影响

目的：观察阿司匹林联合银杏叶制剂对老年高脂血症脂质、脂蛋白代谢及对血液流变学的影响.方法：将264例老年高脂血症患者随机分为两组.治疗组138例,口服银杏叶片、阿司匹林;对照组126例,口服复方丹参片.结果：降低血清总胆固醇（TC）、低密度脂蛋白胆固醇（LDL-C）、脂蛋白α（LPα）治疗组优于对照组（P＜0.05）;改善动脉硬化指数优于对照组（P＜0.05）.改善血液流变学多项指标两组与治疗前比较差异有统计学意义（P＜0.05）.结论：阿司匹林联合银杏叶制剂具有调节老年高脂血症患者脂质和脂蛋白代谢,改善血液流变学的作用.     

阿司匹林精氨酸盐注射液的制备及其稳定性研究

目的　制备阿司匹林精氨酸盐及其注射液 ,并测定含量 ,考察稳定性。方法　阿司匹林与精氨酸反应生成阿司匹林精氨酸盐 ,精制后以注射用水为溶剂制成阿司匹林精氨酸盐注射液 ,用紫外 -可见分光光度法测定其含量 ,考察阿司匹林精氨酸盐及其注射液在 30 ,4 5 ,6 0℃及 30 ,35 ,4 0 ,4 5℃的稳定性。结果　阿司匹林精氨酸盐在高温下不稳定 ,初步确定其注射液的有效期为 1.32年。结论　阿司匹林精氨酸盐及其注射液制备方法可行 ,其原料及制剂在常温下稳定     

应用小剂量阿斯匹林提高宫腔内授精妊娠率的临床观察

目的:本研究采用前瞻性随机双盲的方法,探讨小剂量阿斯匹林对提高宫腔内授精(IUI)妊娠率的临床效果。方法:采用CC/HMG/HCG方案促排卵,将行IUI的114例不孕妇女随机分为两组:观察组57例,于月经第1-20天连续服用阿斯匹林75mg/d;对照组57例,服用安慰剂。分别于排卵前1天和排卵后10天检测两组对象子宫动脉 血流阻力指数(RI)、子宫内膜形态、厚度及妊娠率。结果:两组妊娠率分别为24.6％和14％,子宫内膜呈三线征发生率分别为75.4％和50.8％,经比较均有显著性差异(P<0.01);与对照组比较,观察组RI显著降低(P<0.01),子宫内膜明显增厚(P<0.01)。结论:小剂量阿 斯匹林可改善子宫内膜发育,提高IUI妊娠率。     

阿司匹林对人巨核细胞体外增殖的影响

目的:探讨阿司匹林对巨核细胞增殖、膜抗原表达及凋亡的影响.方法:将骨髓单个核细胞接种于含不同浓度阿司匹林的H2000培养基中,其中含Tpo 50ng·ml-1、SCF 50 ng·ml-1和IL-3 10ng·ml-1,5%CO2、37℃、饱和湿度的孵育箱中培养14d.结果:高浓度阿司匹林使巨核细胞的增殖变化明显高于低浓度,巨核细胞集落(CFU-MK)数减少,细胞丛(FFU-MK)数增加,CD41膜抗原表达率显著降低(P＜0.05);AnnexinV表达率明显增高(P＜0.05);DNA倍体分析的凋亡指数明显升高(P＜0.05);电镜观察可见出芽、空泡样结构和胞浆内颗粒减少.结论:高浓度阿司匹林可影响巨核细胞的正常代谢和促进其凋亡.