MiR-155 Modifies Inflammation, Endothelial Activation and Blood-Brain Barrier Dysfunction in Cerebral Malaria

Overview

Journal Mol Med

Publisher Biomed Central

Specialties General Medicine
Molecular Biology

Date 2017 Feb 10

PMID 28182191

Citations 41

Authors

Kevin Richard Barker

Ziyue Lu

Hani Kim

Ying Zheng

Junmei Chen

Andrea L Conroy

Michael Hawkes

Henry S Cheng

Makon-Sebastien Njock

Jason E Fish

John M Harlan

Jose A Lopez

W Conrad Liles

Kevin C Kain

Affiliations

Soon will be listed here.

Abstract

miR-155 has been shown to participate in host response to infection and neuro-inflammation via negative regulation of blood-brain-barrier (BBB) integrity and T cell function. We hypothesized that miR-155 may contribute to the pathogenesis of cerebral malaria (CM). To test this hypothesis, we used a genetic approach to modulate miR-155 expression in an experimental model of cerebral malaria (ECM). In addition, an engineered endothelialized microvessel system and serum samples from Ugandan children with CM were used to examine an anti-miR-155 as a potential adjunctive therapeutic for severe malaria. Despite higher parasitemia, survival was significantly improved in mice vs. wild-type littermate mice in ECM. Improved survival was associated with preservation of BBB integrity and reduced endothelial activation, despite increased levels of pro-inflammatory cytokines. Pre-treatment with antagomir-155 reduced vascular leak induced by human CM sera in an endothelial microvessel model. These data provide evidence supporting a mechanistic role for miR-155 in host response to malaria via regulation of endothelial activation, microvascular leak and BBB dysfunction in CM.

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