...
首页> 外文期刊>Infection and immunity >Influence of Glucose Levels on the In Vitro Phagocytosis of Bacteria by Human Neutrophils
【24h】

Influence of Glucose Levels on the In Vitro Phagocytosis of Bacteria by Human Neutrophils

机译:葡萄糖水平对人类嗜中性粒细胞体外吞噬细菌的影响

获取原文
           

摘要

A previously developed in vitro method for studying the phagocytosis of bacteria and particles by human neutrophils was used to investigate the influence of different glucose levels on phagocytosis. It was found that high glucose levels (200, 400, and 800 mg of glucose/100 ml) significantly depressed the phagocytosis of Staphylococcus epidermidis, S. aureus, and Escherichia coli. At very low glucose levels, a somewhat decreased phagocytic activity was noted. The strongest phagocytic activity occurred at glucose concentrations of 50 and 100 mg/100 ml. A second effect noted at the higher (200, 400 and 800 mg/100 ml) glucose concentrations was a decreased adhesiveness of the neutrophils to solid surfaces. The mechanism of the decrease in phagocytosis and in neutrophil adhesiveness at higher glucose levels is unknown, but it is not linked to increased osmotic pressures due to the presence of glucose, as ethanol, at the same and even higher osmolal concentrations, had no effect on the phagocytosis. These results show that not only the phagocytic activity of those neutrophils that do adhere to a solid surface is diminished at higher glucose concentrations but also that fewer neutrophils adhere to solid surfaces at higher glucose levels. These two phenomena combined may provide at least part of the explanation for the well-known decrease in resistance to bacterial infections of diabetics.
机译:用于研究人类嗜中性粒细胞吞噬细菌和颗粒的一种先前开发的体外方法用于研究不同葡萄糖水平对吞噬作用的影响。发现高葡萄糖水平(200、400和800 mg葡萄糖/ 100 ml)显着抑制了表皮葡萄球菌,金黄色葡萄球菌和大肠埃希氏菌的吞噬作用。 。在非常低的葡萄糖水平下,发现吞噬活性略有降低。在葡萄糖浓度为50和100 mg / 100 ml时,吞噬活性最强。在较高的葡萄糖浓度(200、400和800 mg / 100 ml)中注意到的第二个效果是嗜中性粒细胞对固体表面的粘附性降低。在较高的葡萄糖水平下吞噬作用和嗜中性白细胞粘附性降低的机制尚不清楚,但与葡萄糖的存在无关,它与渗透压升高无关,因为乙醇在相同甚至更高的渗透压浓度下对葡萄糖没有影响。吞噬作用。这些结果表明,不仅在高葡萄糖浓度下确实粘附于固体表面的那些中性粒细胞的吞噬活性降低,而且在高葡萄糖水平下更少的嗜中性白细胞粘附于固体表面上。这两种现象的结合可以为糖尿病患者对细菌感染的抗药性众所周知的降低提供至少部分的解释。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号