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03.01.2019 | Original Paper | Ausgabe 2/2019

Angiogenesis 2/2019

Interleukin-8 release by endothelial colony-forming cells isolated from idiopathic pulmonary fibrosis patients might contribute to their pathogenicity

Angiogenesis > Ausgabe 2/2019
Adeline Blandinières, Nicolas Gendron, Nour Bacha, Ivan Bièche, Richard Chocron, Hilario Nunes, Nathalie Nevo, Elisa Rossi, Bruno Crestani, Séverine Lecourt, Sylvie Chevret, Anna Lokajczyk, Virginie Mignon, Alexandre Kisaoglu, Karine Juvin, Sebastien Bertil, Dominique Valeyre, Audrey Cras, Pascale Gaussem, Dominique Israël-Biet, David M. Smadja
Wichtige Hinweise

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s10456-018-09659-5) contains supplementary material, which is available to authorized users.

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Idiopathic pulmonary fibrosis (IPF) is a devastating disease characterized by obliteration of alveolar architecture, resulting in declining lung function and ultimately death. Pathogenic mechanisms involve a concomitant accumulation of scar tissue together with myofibroblasts activation and a strong abnormal vascular remodeling. Endothelial progenitor cells (ECFC subtype) have been investigated in several human lung diseases as a potential actor in IPF. We previously demonstrated that ECFCs are down-regulated in IPF in contrast to healthy controls. We postulated here that ECFCs might behave as a liquid biopsy in IPF patients and that they exert modified vasculogenic properties.

Methods and results

ECFCs isolated from controls and IPF patients expressed markers of the endothelial lineage and did not differ concerning adhesion, migration, and differentiation in vitro and in vivo. However, senescent and apoptotic states were increased in ECFCs from IPF patients as shown by galactosidase staining, p16 expression, and annexin-V staining. Furthermore, conditioned medium of IPF-ECFCs had increased level of interleukin-8 that induced migration of neutrophils in vitro and in vivo. In addition, an infiltration by neutrophils was shown in IPF lung biopsies and we found in a prospective clinical study that a high level of neutrophils in peripheral blood of IPF patients was associated to a poor prognosis.


To conclude, our study shows that IPF patients have a senescent ECFC phenotype associated with an increased IL-8 secretion potential that might contribute to lung neutrophils invasion during IPF.

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