Galectin-1 induces 12/15-lipoxygenase expression in murine macrophages and favors their conversion toward a pro-resolving phenotype
During the resolution of inflammation macrophages undergo functional changes upon exposure to pro-resolving agents in their microenvironment. Primarily, engulfment of apoptotic polymorphonuclear (PMN) cells promotes conversion of macrophages toward a pro-resolving phenotype characterized by reduced...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/2354 |
| Acceso en línea: | http://hdl.handle.net/11336/2354 |
| Access Level: | acceso abierto |
| Palabra clave: | 15-LIPOXYGENASE EFFEROCYTOSIS GALECTIN-1 MACROPHAGES RESOLUTION OF INFLAMMATION https://purl.org/becyt/ford/3.1 https://purl.org/becyt/ford/3 |
| Sumario: | During the resolution of inflammation macrophages undergo functional changes upon exposure to pro-resolving agents in their microenvironment. Primarily, engulfment of apoptotic polymorphonuclear (PMN) cells promotes conversion of macrophages toward a pro-resolving phenotype characterized by reduced CD11b expression. These macrophages are not phagocytic, do not respond to TLR ligands, and express relatively high levels of the pro-resolving enzyme 12/15-lipoxygenase (LO). Here, we report that the immuno-regulatory lectin galectin-1 is selectively expressed by CD11bhigh, but not CD11blow macrophages. Upon exposure in vivo and ex vivo, galectin-1 directly promoted macrophage conversion from a CD11bhigh to a CD11blow phenotype and up-regulated the expression and activity of 12/15-LO. Moreover, galectin-1 treatment in vivo promoted the loss of phagocytic capacity (efferocytic satiation) in peritoneal macrophages and down-regulated secretion of TNF-α, IL-1β, and IL-10 upon LPS exposure. Our results suggest that galectin-1 could be an essential mediator in the control of macrophage function during the resolution of inflammation. |
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