Lymph node expansion during inflammation is essential to establish immune responses and relies on the development of blood and lymph vessels. Previous work in mice has shown that this process depends on the presence of VEGF-A produced by B cells, macrophages and stromal cells. In humans, however, the cell types and the mechanisms regulating the intranodal production of VEGF-A remain elusive. Here we show that CD11c+ cells represent the main VEGF-A-producing cell population in human reactive secondary lymphoid organs. In addition we find that three transcription factors, namely CREB, HIF-1α and STAT3, regulate the expression of VEGF-A in inflamed DCs. Both HIF-1α and STAT3 are activated by inflammatory agonists. Conversely, CREB phosphorylation represents the critical contribution of endogenous or exogenous PGE2. Taken together, these results propose a crucial role for DCs in lymph node inflammatory angiogenesis and identify novel potential cellular and molecular targets to limit inflammation in chronic diseases and tumors.

Dendritic cell-derived VEGF-A plays a role in inflammatory angiogenesis of human secondary lymphoid organs and is driven by the coordinated activation of multiple transcription factors / Salvi, Valentina; Vermi, William; Gianello, Veronica; Lonardi, Silvia; Gagliostro, Vincenzo; Naldini, Antonella; Sozzani, Silvano; Bosisio, Daniela. - In: ONCOTARGET. - ISSN 1949-2553. - 7:26(2016), pp. 39256-39269. [10.18632/oncotarget.9684]

Dendritic cell-derived VEGF-A plays a role in inflammatory angiogenesis of human secondary lymphoid organs and is driven by the coordinated activation of multiple transcription factors

SOZZANI, Silvano
;
2016

Abstract

Lymph node expansion during inflammation is essential to establish immune responses and relies on the development of blood and lymph vessels. Previous work in mice has shown that this process depends on the presence of VEGF-A produced by B cells, macrophages and stromal cells. In humans, however, the cell types and the mechanisms regulating the intranodal production of VEGF-A remain elusive. Here we show that CD11c+ cells represent the main VEGF-A-producing cell population in human reactive secondary lymphoid organs. In addition we find that three transcription factors, namely CREB, HIF-1α and STAT3, regulate the expression of VEGF-A in inflamed DCs. Both HIF-1α and STAT3 are activated by inflammatory agonists. Conversely, CREB phosphorylation represents the critical contribution of endogenous or exogenous PGE2. Taken together, these results propose a crucial role for DCs in lymph node inflammatory angiogenesis and identify novel potential cellular and molecular targets to limit inflammation in chronic diseases and tumors.
2016
CD1a+ interdigitating DCs; CD1c+ DCs; DAMPs; draining lymph node; PAMPs; pathology section; oncology
01 Pubblicazione su rivista::01a Articolo in rivista
Dendritic cell-derived VEGF-A plays a role in inflammatory angiogenesis of human secondary lymphoid organs and is driven by the coordinated activation of multiple transcription factors / Salvi, Valentina; Vermi, William; Gianello, Veronica; Lonardi, Silvia; Gagliostro, Vincenzo; Naldini, Antonella; Sozzani, Silvano; Bosisio, Daniela. - In: ONCOTARGET. - ISSN 1949-2553. - 7:26(2016), pp. 39256-39269. [10.18632/oncotarget.9684]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1371550
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