A monoclonal antibody-defined membrane antigen complex is required for neutrophil-neutrophil aggregation

We examined the aggregation responses of normal neutrophils treated with the murine monoclonal antibody (MoAb) 60.3. Addition of MoAb 60.3 to normal neutrophils produced dose-dependent inhibition of neutrophil aggregation in response to phorbol myristate acetate, zymosan-activated plasma, and N-formyl-methionylleucylphenylalanine. We conclude that the membrane glycoprotein complex recognized by MoAb 60.3--designated CDw18- -is required for neutrophil-neutrophil aggregation in vitro.     

Prevention of transfusion-associated graft-versus-host disease: selection of an adequate dose of gamma radiation

To determine the optimal dose of gamma radiation necessary to inhibit T- lymphocyte function and prevent transfusion-acquired graft-versus-host disease (TA-GVHD), a donor plateletpheresis component was initially divided into ten 20-mL samples. One sample was not irradiated, while the other nine samples were treated with gamma radiation at doses ranging from 500 to 4500 cGy. T-lymphocyte function was subsequently measured by mixed lymphocyte cultures and mitogen stimulation assays. The results were assessed in each test by calculating the percentage of inhibition of each irradiated sample as compared to that of the unirradiated sample. The accuracy of the delivered dose of gamma radiation was measured with thermoluminescent dosimeters. It was concluded that a nominal dose of 3000 cGy (actual dose delivered, 2898 cGy) is the appropriate amount of gamma radiation needed to eliminate T- lymphocyte-mediated graft-versus-host disease.     

Efficacy and tolerability of pantoprazole 40 mg versus 80 mg in patients with reflux oesophagitis.

BACKGROUND: Pantoprazole is a substituted benzimidazole which is a potent inhibitor of gastric acid secretion by its action upon H+, K+- ATPase. METHODS: Pantoprazole 40 mg and 80 mg were compared in a randomized double-blind study in 192 out-patients with stage II or III (Savary-Miller classification) reflux oesophagitis. Patients received either pantoprazole 40 mg (n = 97) or pantoprazole 80 mg (n = 95), once daily before breakfast for 4 weeks. Treatment was extended for a further 4 weeks if the oesophagitis had not healed. RESULTS: After 4 weeks complete healing of the reflux oesophagitis was seen in 78% of protocol-correct patients given pantoprazole 40 mg daily (n = 86), and in 72% in the 80 mg (n = 87) group. The cumulative healing rates after 8 weeks were 95 and 94%, respectively (P > 0.05, Cochran-Mantel- Haenszel), and time until healing of oesophagitis comparable in both groups. Differences between doses were also not significant in an intention-to-treat analysis. Both dosing schedules were well tolerated and the patients experienced remarkable symptom relief. No adverse event or changes in laboratory values of clinical significance could definitely be ascribed to the trial medication. CONCLUSION: The 40 mg pantoprazole dosage is comparable to 80 mg in reflux oesophagitis, both in efficacy and tolerability.     

高效液相色谱法测定人血清和尿中盐酸青藤碱浓度及药代动力学研究

用RP-HPLC法,以三唑仑为内标,反相C₁₈为分析柱,乙腈—0.01mol·L^-1磷酸二氢钠—四甲基乙二胺(46∶54∶0.22v/v)为流动相,磷酸调至pH6.9,检测波长263nm,测定血清和尿中盐酸青藤碱浓度,线性范围分别为6～480ng·mL^-1和0.06～3μg·mL^-1,平均回收率75.88%和91.35%,日内日间误差小于5%,最低检测浓度血清4ng·mL^-1,尿40ng·mL^-1。8名健康男性志愿者单次口服盐酸青藤碱片80mg,测定血清及尿浓度,该药符合二室开放模型,体内消除符合一级动力学消除过程,主要药代动力学参数:T_1/2α0.791±0.491h,T_1/2β9.397±2.425h,T_{max 1.040±0.274h,Cmax246.604±71.165ng·mL^-1,AUC 2651.158±1039.050ng·h·mL^-1,CL 0.033±0.01ng·mL^-1。}