Characterization of Spinal Cord Tissue-derived Extracellular Vesicles in Neuroinflammation

Overview

Journal J Neuroinflammation

Publisher Biomed Central

Date 2024 Jun 8

PMID 38851724

Authors

Larissa Jank

Ajay Kesharwani

Taekyung Ryu

Deepika Joshi

Dimitrios C Ladakis

Matthew D Smith

Saumitra Singh

Tanina Arab

Kenneth W Witwer

Peter A Calabresi

Chan-Hyun Na

Pavan Bhargava

Affiliations

Soon will be listed here.

Abstract

Extracellular vesicles (EVs) are released by all cells, can cross the blood-brain barrier, and have been shown to play an important role in cellular communication, substance shuttling, and immune modulation. In recent years EVs have shifted into focus in multiple sclerosis (MS) research as potential plasma biomarkers and therapeutic vehicles. Yet little is known about the disease-associated changes in EVs in the central nervous system (CNS). To address this gap, we characterized the physical and proteomic changes of mouse spinal cord-derived EVs before and at 16 and 25 days after the induction of experimental autoimmune encephalomyelitis (EAE), a neuroinflammatory model of MS. Using various bioinformatic tools, we found changes in inflammatory, glial, and synaptic proteins and pathways, as well as a shift in the predicted contribution of immune and glial cell types over time. These results show that EVs provide snapshots of crucial disease processes such as CNS-compartmentalized inflammation, re/de-myelination, and synaptic pathology, and might also mediate these processes. Additionally, inflammatory plasma EV biomarkers previously identified in people with MS were also altered in EAE spinal cord EVs, suggesting commonalities of EV-related pathological processes during EAE and MS and overlap of EV proteomic changes between CNS and circulating EVs.

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