Extracellular vesicles secreted by the ТНР-1 cells influence on the inflammation gene expression in zebrafish

Author:

Sambur D. B.1,Kalinina O. V.1,Aquino A. D.1,Tirikova P. V.1,Migunova M. A.1,Koroleva E. E.1,Trulyov A. S.2,Rubinshtein A. A.12,Kudryavtsev I. V.12,Golovkin A. S.1

Affiliation:

1. Institution “Almazov National Medical Research Center”

2. Institution “Institute of Experimental Medicine”

Abstract

Extracellular vesicles secreted by immune cells may play a significant role in the initiation, maintenance, and progression of systemic inflammation. The aim of the study was to investigate the regulatory effect of extracellular vesicles (EVs) produced by activated monocyte-like THP-1 cells on expression levels of inflammatory genes in a zebrafish. Real-time PCR analysis was performed to investigate the relative expression levels of il-1β, il-6, tnf-α, ifn-γ, mpeg1.1, mpeg1.2, mpx, and il-10 genes in the brain, liver, and heart of zebrafish followed by intracelomic injection of EVs produced by THP-1 cells activated with tumor necrosis factor (TNF) and phorbol-12-myristate-13-acetate (PMA) at different concentrations. EVs, secreted by activated THP-1 cells with TNF at a concentration of 10 ng/mL and PMA at concentrations of 16 and 50 ng/mL, reduced the expression levels of il-1β, ifn-γ, tnf-α, mpx, mpeg1.1, mpeg1.2, and IL-10 genes in the brain, heart and liver of Danio rerio. Wherein, EVs secreted by THP-1 cells treated with TNF at doses of 10 and 20 ng/ml had opposite effects on the gene expression levels of il-1β in the brain, il-1β, il-10, and il-6 in the heart; on il-1β, il-10, mpx, and mpeg1.2 in the liver. EVs secreted by THP-1 cells treated with PMA at doses of 16 and 50 ng/ml had opposite effects on the expression levels of il-6 and il-10 genes in the heart and ifn-γ gene in the liver. EVs, produced by activated THP-1 cells have a systemic effect on Danio rerio manifested in a changing of the expression level of pro- and anti-inflammatory cytokine genes in the brain, liver, and heart. The qualitative composition of the EVs produced by activate THP-1 cells varies depending on the type and dose of the used stimulus, that reflects on strength and direction of the effects detected in vivo.

Publisher

The Russian Academy of Sciences

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