کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5834060 | 1122640 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of the lipopolysaccharide antagonist Planktothrix sp. FP1 cyanobacterial extract on human polymorphonuclear leukocytes
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
ایمنی شناسی و میکروب شناسی
ایمونولوژی
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چکیده انگلیسی
CyP is a lipopolysaccharide (LPS)-like molecule extracted from the freshwater cyanobacterium Oscillatoria planktothrix FP1, which has been reported to be a potent competitive inhibitor of bacterial LPS. In the present study the ability of CyP to affect human polymorphonuclear leukocyte (PMN) function was investigated. PMNs were isolated from venous blood by standard density-gradient centrifugation. Cell migration was measured by use of the Boyden chamber assay. Interleukin (IL)-8 and tumor necrosis factor (TNF)-α production was measured using a sandwich-type enzyme-linked immunosorbent assay. PMN intracellular reactive oxygen species (ROS) levels were assessed by the use of a fluorescent probe coupled to spectrophotometry. CyP 10-100 μg/ml was chemotactic for PMNs without affecting the chemotactic response to either E. coli LPS or N-formyl-Met-Leu-Phe (fMLP). CyP per se did not affect PMN production of either IL-8 or TNF-α, but concentration-dependently reduced LPS-induced production of both cytokines. On the contrary, CyP had no effect either on fMLP-induced production of IL-8 or on PMN oxidative burst (at rest and after stimulation with fMLP), a response which is known to be independent from LPS-operated pathways. In human PMNs CyP behaves as a selective and effective LPS antagonist. These findings support the therapeutic potential of CyP in endotoxin-dependent disease.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Immunopharmacology - Volume 11, Issue 2, February 2011, Pages 194-198
Journal: International Immunopharmacology - Volume 11, Issue 2, February 2011, Pages 194-198
نویسندگان
Ramòna Consuèlo Maio, Marco Cosentino, Carlo Rossetti, Monica Molteni, Sergio Lecchini, Franca Marino,