Microglia-Derived Microvesicles Affect Microglia Phenotype in Glioma

Alfonso Grimaldi, Carmela Serpe, Giuseppina Chece, Valentina Nigro, Angelo Sarra, Barbara Ruzicka, Michela Relucenti, Giuseppe Familiari, Giancarlo Ruocco, Giuseppe Rubens Pascucci, Francesca Guerrieri, Cristina Limatola, Myriam Catalano

Research output: Contribution to journalArticlepeer-review

Abstract

Extracellular-released vesicles (EVs), such as microvesicles (MV) and exosomes (Exo) provide a new type of inter-cellular communication, directly transferring a ready to use box of information, consisting of proteins, lipids and nucleic acids. In the nervous system, EVs participate to neuron-glial cross-talk, a bidirectional communication important to preserve brain homeostasis and, when dysfunctional, involved in several CNS diseases. We investigated whether microglia-derived EVs could be used to transfer a protective phenotype to dysfunctional microglia in the context of a brain tumor. When MV, isolated from microglia stimulated with LPS/IFNγ were brain injected in glioma-bearing mice, we observed a phenotype switch of tumor associated myeloid cells (TAMs) and a reduction of tumor size. Our findings indicate that the MV cargo, which contains upregulated transcripts for several inflammation-related genes, can transfer information in the brain of glioma bearing mice modifying microglial gene expression, reducing neuronal death and glioma invasion, thus promoting the recovery of brain homeostasis.

Original languageEnglish
Pages (from-to)41
JournalFrontiers in Cellular Neuroscience
Volume13
DOIs
Publication statusPublished - 2019

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