Lymphokine-induced phagocytosis in angiocentric immunoproliferative lesions (AIL) and malignant lymphoma arising in AIL

A factor that augmented the phagocytosis of IgG-coated ox red blood cells by the human monocyte/macrophage line U937 was identified in cell culture supernatants from two of two patients with angiocentric peripheral T cell lymphomas, three of three patients with angiocentric immunoproliferative lesions that were not frankly malignant, and one of two patients with T lymphoblastic malignancies. The factor was not present in supernatants derived from 14 nonangiocentric peripheral T cell lymphomas of other histologic types nor in ten cases of B cell lymphoma and two cases of Hodgkin's disease. A similar factor was present in the supernatants of concanavalin A (Con A)-stimulated normal peripheral blood mononuclear cells and in the supernatants of IL-2- dependent T cell lines derived from normal peripheral blood. The factor had an apparent mol wt of greater than 50,000 daltons, was heat labile (100 degrees C for two minutes), and stable at pH 2.0. Its stimulation of phagocytosis was independent of any increase in number of Fc receptors. Thus, this factor is probably not gamma-interferon. This factor may play a pathogenetic role in the hemophagocytic syndromes associated with certain T cell malignancies and immunodeficient states.     

薄层色谱溶剂系统的最优化方法

本文以模糊聚类分析法对81种常用溶剂进行分类,并根据最相邻原理从中优选出二十种色谱分析常用溶剂。再据此结果,以均匀设计试验法和最优化方法——单纯形法为手段,进行溶剂系统的最优化设计。并提出一个改良的色谱优化函数。经初步验证,这是一种比较有效与实用的系统化方法,尚未见国内外报道。本法不仅适用于薄层色谱,也适用于纸色谱及柱型液相色谱。     

Spontaneous bacterial peritonitis in fulminant hepatic failure

Ascites may be associated with fulminant hepatic failure (FHF), but spontaneous bacterial peritonitis (SBP) is an extremely rare complication. We report on two patients with FHF who developed SBP. One patient died and the other recovered.     

In vitro and in vivo selectin-blocking activities of sulfated lipids and sulfated sialyl compounds

There is accumulating evidence that sulfated lipids, sulfated oligosaccharides and other sulfated compounds are reactive with selectins in a manner that interferes with selectin interactions with their natural ligands. In the report we describe the ability of sulfated lipids (sulfatides and gangliosides) and multimeric forms of sulfated sialic acid to block binding of P- and E-selectin-Ig to neutrophils. The in vivo ability of these compounds to block lung injury in rats following i.v. infusion of purified cobra venom factor (CVF), which induces injury that is L- and P-selectin dependent, was also determined as well as effects on recruitment of neutrophils, as measured by lung myeloperoxidase. There was a significant correlation between the ability of sulfated lipids and sialyl compounds to interfere in vitro with P-selectin-Ig binding to neutrophils and to protect against P-selectin-dependent acute lung injury induced by CVF. The biological effects of these sulfated compounds were also associated with diminished accumulation of neutrophils. The protective effects of these compounds may be linked to their ability to interfere with P- selectin binding to counter-receptors on neutrophils.      

Kalman滤波分光光度法同时测定多相脂质体口服液中氟尿嘧啶和尼泊金的含量

本文提出了对测量值平滑后,用Kalman滤波分光光度法同时测定多相脂质体口服液中氟尿嘧啶和尼泊金的含量,改善了滤波效果,较好地解决了复杂基质存在下多组分的同时测定。用人工合成样考察表明,在269～273nm间滤波结果较好。用分别相当制剂标示量80,100,120%的两组分九种可能组合人工合成样品考查结果表明,氟尿嘧啶和尼泊金的回收率分别为99.3～102.6%和97.8～103.0%;当存在系统误差时,回收率分别为99.4～102.7%和97.0～102.9%     

鼠肺门剥脱后肺淋巴引流中断对抗体反应的影响

肺移植后肺感染的发生率比其它器官移植后明显增高，这提示移植肺的免疫反应可能受损。为了研究肺淋巴引流中断对抗体反应的影响，我们用肺门剥脱鼠作为模型，设计了３个实验：（１）用着色淋巴造影术目视检查肺门淋巴管的再生；（２）在支气管内滴注碳粒子后观察粒子从肺到肺引流淋巴结的运输；（３）用羊红细胞使肺免疫后测定抗体反应。结果显示肺门淋巴管被肺门剥脱术所中断，在术后７天开始再生；在术后第１周粒子运输到肺引流淋巴结受阻，此后逐渐恢复正常；在肺门剥脱后７天和１０天免疫的鼠血清抗体反应缺如或低下，其后１月内恢复。由此得出结论，只要抗原不能经淋巴管从肺运送到肺引流淋巴结，肺门剥脱肺内的抗原抗体反应就受到损害。该发现可部分地解释为什么在肺移植后最初几周内经常发生肺感染。