Journal
FASEB JOURNAL
Volume 24, Issue 10, Pages 3970-3980Publisher
FEDERATION AMER SOC EXP BIOL
DOI: 10.1096/fj.10-159921
Keywords
inflammation resolution; lipoxin; nitric oxide; platelet-leukocyte interaction
Categories
Funding
- Italian Foundation for Cystic Fibrosis Research [FFC 12/2005, FFC 15/2007]
- Italian Ministry of University and Research [CEPR D.D. 484/Ric 2008]
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Inflammatory lung disease is a primary cause of morbidity and mortality in cystic fibrosis (CF). Mechanisms of unresolved acute inflammation in CF are not completely known, although the involvement of cystic fibrosis transmembrane conductance regulator (CFTR) in nonrespiratory cells is emerging. Here we examined CFTR expression and function in human platelets (PLTs) and found that they express a biologically active CFTR. CFTR blockade gave an similar to 50% reduction in lipoxin A(4) (LXA(4)) formation during PLT/polymorphonuclear leukocytes (PMN) coincubations by inhibiting the lipoxin synthase activity of PLT 12-lipoxygenase. PLTs from CF patients generated similar to 40% less LXA(4) compared to healthy subject PLTs. CFTR inhibition increased PLT-dependent PMN viability (33.0 +/- 5.7 vs. 61.2 +/- 8.2%; P=0.033), suppressed nitric oxide generation (0.23 +/- 0.04 vs. 0.11 +/- 0.002 pmol/10(8) PLTs; P=0.004), while reducing AKT (1.02 +/- 0.12 vs. 0.71 +/- 0.007 U; P=0.04), and increasing p38 MAPK phosphorylation (0.650 +/- 0.09 vs. 1.04 +/- 0.24 U; P=0.03). Taken together, these findings indicate that PLTs from CF patients are affected by the molecular defect of CFTR. Moreover, this CF PLT abnormality may explain the failure of resolution in CF.-Mattoscio, D., Evangelista, V., De Cristofaro, R., Recchiuti, A., Pandolfi, A., Di Silvestre, S., Manarini, S., Martelli, N., Rocca, B., Petrucci, B., Angelini, D. F., Battistini, L., Robuffo, I., Pensabene, T., Pieroni, L., Furnari, M. L., Pardo, F., Quattrucci, S., Lancellotti, S., Davi, G., Romano, M. Cystic fibrosis transmembrane conductance regulator (CFTR) expression in human platelets: impact on mediators and mechanisms of the inflammatory response. FASEB J. 24, 3970-3980 (2010). www.fasebj.org
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