title: Tripartite siRNA micelles as controlled delivery systems for primary dendritic cells.
abstract: Dendritic cells (DCs) are key cells in immunology that are able to stimulate or inhibit the immune response. RNA interference has appeared of great interest to modulate the expression of immunogenic or tolerogenic molecules. In our study, pH-sensitive polyion complex micelles based on a double-hydrophilic block copolymer and poly-L-lysine were formulated to entrap a small interfering RNA (siRNA). We show that siRNA-loaded micelles were cytotolerant and efficiently endocytosed by DCs. siRNA targeting eGFP, used as model siRNA, was released into the cytosol following endocytosis of the micelles and the silencing of eGFP expression was observed in DC isolated from transgenic mice. Our results underscore the potential of pH-sensitive polyion complex micelles to formulate therapeutic siRNA for DC engineering in order to maintain the homeostasis of the immune response.
authors.affiliation: Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-ENSCM-UM2-UM1, Montpellier, France.
authors.forename: Ariane
authors.initials: A
authors.lastname: Boudier
authors.forename: Anne
authors.initials: A
authors.lastname: Aubert-Pouëssel
authors.forename: Corine
authors.initials: C
authors.lastname: Gérardin
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Devoisselle
authors.forename: Sylvie
authors.initials: S
authors.lastname: Bégu
authors.forename: Pascale
authors.initials: P
authors.lastname: Louis-Plence
authors.forename: Julie
authors.initials: J
authors.lastname: Quentin
authors.forename: Christian
authors.initials: C
authors.lastname: Jorgensen
mesh_terms: D000818:Animals; D003600:Cytosol / Q000378:metabolism; D003713:Dendritic Cells / Q000378:metabolism*; D004705:Endocytosis; D020868:Gene Silencing; D049452:Green Fluorescent Proteins / Q000235:genetics; D006863:Hydrogen-Ion Concentration; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D008823:Micelles; D011107:Polylysine / Q000737:chemistry; D034741:RNA, Small Interfering / Q000008:administration & dosage*
chemical_list: D008823:Micelles; D034741:RNA, Small Interfering; C485184:enhanced green fluorescent protein; D049452:Green Fluorescent Proteins; D011107:Polylysine