CD5L as a promising biological therapeutic for treating sepsis

Author:

Oliveira LilianaORCID,Silva M. CarolinaORCID,Gomes Ana P.,Santos Rita F.,Cardoso Marcos S.ORCID,Nóvoa AnaORCID,Luche HervéORCID,Cavadas Bruno,Amorim IrinaORCID,Gärtner Fátima,Malissen BernardORCID,Mallo MoisésORCID,Carmo Alexandre M.ORCID

Abstract

AbstractSepsis results from systemic, dysregulated inflammatory responses to infection, culminating in multiple organ failure. Here, we demonstrate the utility of CD5L for treating experimental sepsis caused by cecal ligation and puncture (CLP). We show that CD5L’s important features include its ability to enhance neutrophil recruitment and activation by increasing circulating levels of CXCL1, and to promote neutrophil phagocytosis. CD5L-deficient mice exhibit impaired neutrophil recruitment and compromised bacterial control, rendering them susceptible to attenuated CLP. CD5L-/- peritoneal cells from mice subjected to medium-grade CLP exhibit a heightened pro-inflammatory transcriptional profile, reflecting a loss of control of the immune response to the infection. Intravenous administration of recombinant CD5L (rCD5L) in immunocompetent C57BL/6 wild-type (WT) mice significantly ameliorates measures of disease in the setting of high-grade CLP-induced sepsis. Furthermore, rCD5L lowers endotoxin and damage-associated molecular pattern (DAMP) levels, and protects WT mice from LPS-induced endotoxic shock. These findings warrant the investigation of rCD5L as a possible treatment for sepsis in humans.

Publisher

Springer Science and Business Media LLC

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