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首页> 外文期刊>Cellular Signalling >Lysophosphatidic acid increases phosphatidic acid formation, phospholipase D activity and degranulation by human neutrophils
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Lysophosphatidic acid increases phosphatidic acid formation, phospholipase D activity and degranulation by human neutrophils

机译:溶血磷脂酸增加人中性粒细胞的磷脂酸形成,磷脂酶D活性和脱粒

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摘要

I-Oleoyi-sn-glycero-3 -phosphate, a lysophosphatidic acid (LPA), in serum is a biologically active lipid and has multiple functions depending on the cell types. Several studies have shown that LPA stimulates phospholipase D (PLD) activity in fibroblasts and prostate cancer cells in culture. PLD plays a central role in regulating neutrophil functions. One of the functions of the lipid product, phosphatidic acid (PA), of PLD action in neutrophils is to promote degranulation. In the present study, we examined the effect of LPA on PLD activity and degranulation by human neutrophils. The results show that exogenous LPA increased PA formation, PLD activity and degranulation by human neutrophils in a time and concentration dependent manner. These findings suggest that LPA released from activated platelets during blood clotting may participate in bacterial killing and wound healing process. On the other hand, augmented LPA production might be involved in inflammation, causing damage of the host tissues. (C) 2004 Elsevier Inc. All rights reserved.
机译:血清中的I-油基-sn-甘油3-磷酸酯(溶血磷脂酸(LPA))是具有生物活性的脂质,根据细胞类型具有多种功能。几项研究表明,LPA刺激培养的成纤维细胞和前列腺癌细胞中的磷脂酶D(PLD)活性。 PLD在中性粒细胞功能调节中起着核心作用。在嗜中性粒细胞中具有PLD作用的脂质产物磷脂酸(PA)的功能之一是促进脱粒。在本研究中,我们检查了LPA对人嗜中性粒细胞PLD活性和脱粒的影响。结果表明,外源性LPA以时间和浓度依赖性方式增加了人类嗜中性粒细胞的PA形成,PLD活性和脱粒。这些发现表明,在凝血过程中从活化血小板释放的LPA可能参与了细菌杀伤和伤口愈合过程。另一方面,增加的LPA产量可能与炎症有关,从而导致宿主组织受损。 (C)2004 Elsevier Inc.保留所有权利。

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