title: Inhibition of monocyte adhesion to brain-derived endothelial cells by dual functional RNA chimeras.
abstract: Because adhesion of leukocytes to endothelial cells is the first step of vascular-neuronal inflammation, inhibition of adhesion and recruitment of leukocytes to vascular endothelial cells will have a beneficial effect on neuroinflammatory diseases. In this study, we used the pRNA of bacteriophage phi29 DNA packaging motor to construct a novel RNA nanoparticle for specific targeting to transferrin receptor (TfR) on the murine brain-derived endothelial cells (bEND5) to deliver ICAM-1 siRNA. This RNA nanoparticle (FRS-NPs) contained a FB4 aptamer targeting to TfR and a siRNA moiety for silencing the intercellular adhesion molecule-1 (ICAM-1). Our data indicated that this RNA nanoparticle was delivered into murine brain-derived endothelial cells. Furthermore, the siRNA was released from the FRS-NPs in the cells and knocked down ICAM-1 expression in the TNF-α-stimulated cells and in the cells under oxygen-glucose deprivation/reoxygenation (OGD/R) condition. The functional end points of the study indicated that FRS-NPs significantly inhibited monocyte adhesion to the bEND5 cells induced by TNF-α and OGD/R. In conclusion, our approach using RNA nanotechnology for siRNA delivery could be potentially applied for inhibition of inflammation in ischemic stroke and other neuroinflammatory diseases, or diseases affecting endothelium of vasculature.
authors.affiliation: Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio, USA.
authors.forename: Jing
authors.initials: J
authors.lastname: Hu
authors.affiliation: Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX , USA.
authors.forename: Feng
authors.initials: F
authors.lastname: Xiao
authors.affiliation: Department of Biological Sciences, McMicken College of Arts & Sciences, University of Cincinnati, Cincinnati, Ohio, USA.
authors.forename: Xin
authors.initials: X
authors.lastname: Hao
authors.affiliation: Department of Basic Pharmaceutical Sciences, School of Pharmacy, Husson University, Bangor, Maine, USA.
authors.forename: Shuhua
authors.initials: S
authors.lastname: Bai
authors.affiliation: Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio, USA.
authors.forename: Jiukuan
authors.initials: J
authors.lastname: Hao