Article
Laminin Triggers Neutrophil Extracellular Traps (NETs) and Modulates NET Release Induced by Leishmania amazonensis
Registro en:
OLIVEIRA, Gustavo Silva et al. Laminin Triggers Neutrophil Extracellular Traps (NETs) and Modulates NET Release Induced by Leishmania amazonensis. Biomedicines, v. 10, 521, p. 1 - 14, Feb. 2022.
2227-9059
10.3390/ biomedicines10030521
Autor
Oliveira, Gustavo Silva
Lacerda, Leandra Linhares
Mattos, Thayana R. F.
Sanches, Camila
Sampaio, Tatiana Coelho
Riederer, Ingo
Saraiva, Elvira M.
Resumen
Neutrophils are recruited from the blood and transmigrate through the endothelium to
reach tissues, where they are prone to respond through different mechanisms, including the release of
neutrophil extracellular traps (NETs). These responses occur in close contact with proteins from the
basement membrane and extracellular matrix, where laminins are abundant. Thus, we investigated
the interactions between neutrophils and different laminin (LM) isoforms and analyzed the induction
of NETs. We showed that neutrophils stimulated with LM isoforms 111, 211, 332, 411, 421, and
511 released NETs. The same occurred when neutrophils interacted with polymerized LMs 111,
411, and 511. LM-induced NETs were partially inhibited by pretreatment of neutrophils with an
anti- 6 integrin antibody. Furthermore, NETs triggered by laminins were dependent on elastase and
peptidylarginine deiminase (PAD)-4, enzymes that participate in chromatin decondensation. We
also found that LMs 411 and LM 511 potentiated the NET release promoted by promastigotes of
the protozoan parasite Leishmania, and that NETs stimulated by LMs alone display leishmanicidal
activity. The ability of LM to induce NET release may have potential implications for the course of
inflammation or infection.