Abstract:
:In this study, we identified and characterized the potential of a high ratio of bicarbonate to CO2 and a moderately alkaline pH to render neutrophils prone to undergo neutrophil extracellular trap (NET) formation. Both experimental settings increased the rate of spontaneous NET release and potentiated the NET-inducing capacity of phorbol esters (phorbol-2-myristate-13-acetate), ionomycin, monosodium urate, and LPS. In contrast, an acidic environment impaired NET formation both spontaneous and induced. Our findings indicate that intracellular alkalinization of neutrophils in response to an alkaline environment leads to an increase of intracellular calcium and neutrophil activation. We further found that the anion channel blocker DIDS strongly reduced NET formation induced by bicarbonate. This finding suggests that the effects observed are due to a molecular program that renders neutrophils susceptible to NET formation. Inflammatory foci may be characterized by an acidic environment. Our data indicate that NET formation is favored by the higher pH at the border regions of inflamed areas. Moreover, our findings highlight the necessity for strict pH control during assays of NET formation.
journal_name
Front Immunoljournal_title
Frontiers in immunologyauthors
Maueröder C,Mahajan A,Paulus S,Gößwein S,Hahn J,Kienhöfer D,Biermann MH,Tripal P,Friedrich RP,Munoz LE,Neurath MF,Becker C,Schett GA,Herrmann M,Leppkes Mdoi
10.3389/fimmu.2016.00583subject
Has Abstractpub_date
2016-12-09 00:00:00pages
583issn
1664-3224journal_volume
7pub_type
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