Adhesion attenuates respiratory burst induced by different modes of triggering in resting or LPS-primed neutrophils

作者：Sanui Terukazu; Takeshita Masaaki; Fukuda Takao; Tanaka Urara; Alshargabi Rehab; Aida Yoshitomi^*; Nishimura Fusanori

来源：Immunobiology, 2017, 222(8-9): 865-871.

DOI：10.1016/j.imbio.2017.05.001

• Neutrophil
• Superoxide anion
• Adherence
• Biological surface
• Collagen
• Poly HEMA

The effects of adherence on neutrophil superoxide anion (O-2(-)) generation triggered by surface, soluble ligand, or adherence were studied. Resting-neutrophils adhered to the uncoated tubes resulting in O-2(-) generation, but not on plasma-, fibrinogen-, vitronectin-, fibronectin-, laminin-, collagen-, or poly HEMA-coated surfaces. Enhanced N-formyl-methionyl-leucyl-phenylalanine (fMLP)-stimulated O-2(-) generation by LPS-primed-neutrophils was induced by the incubation on plasma, fibrinogen, vitronectin, fibronectin, or laminin in the absence of Mg2+. In the presence of Mg2+, this response was observed in cells on collagen or poly HEMA. LPS-primedneutrophils adhered to uncoated, BSA- or IgG-coated tubes and did not respond to fMLP, indicating that the fMLP-response of LPS-primed-neutrophils was suppressed by adherence. Upon incubation on plasma, fibrinogen, vitronectin, fibronectin in the presence of Mg2+, LPS-primedneutrophils showed O-2(-) generation.
Upon incubation on collagen or poly HEMA, the primed-neutrophils neither generated O-2(-) nor adhered. We found that O-2(-) response of LPS-primed-neutrophils was attenuated depending on the time of exposure to plasma-coated surface. This attenuation was evident on plasma or fibrinogen, but not on collagen in the presence of Mg2+, indicating that O-2(-) generation by LPS-primed-neutrophils was attenuated dependent on adherence but not on Mg2+. Thus, adhesion attenuated the O-2(-) generation triggered by both soluble (fMLP) and insoluble (surface) stimuli.

• 出版日期2017-9