title: Calcium phosphate nanoparticles show an effective activation of the innate immune response in vitro and in vivo after functionalization with flagellin.
abstract: For subunit vaccines, adjuvants play a key role in shaping the magnitude, persistence and form of targeted antigen-specific immune response. Flagellin is a potent immune activator by bridging innate inflammatory responses and adaptive immunity and an adjuvant candidate for clinical application. Calcium phosphate nanoparticles are efficient carriers for different biomolecules like DNA, RNA, peptides and proteins. Flagellin-functionalized calcium phosphate nanoparticles were prepared and their immunostimulatory effect on the innate immune system, i.e. the cytokine production, was studied. They induced the production of the proinflammatory cytokines IL-8 (Caco-2 cells) and IL-1β (bone marrow-derived macrophages; BMDM) in vitro and IL-6 in vivo after intraperitoneal injection in mice. The immunostimulation was more pronounced than with free flagellin.
authors.affiliation: Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Essen, 45117, Germany.
authors.forename: Diana
authors.initials: D
authors.lastname: Kozlova
authors.forename: Viktoriya
authors.initials: V
authors.lastname: Sokolova
authors.forename: Maohua
authors.initials: M
authors.lastname: Zhong
authors.forename: Ejuan
authors.initials: E
authors.lastname: Zhang
authors.forename: Jingyi
authors.initials: J
authors.lastname: Yang
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.forename: Jan
authors.initials: J
authors.lastname: Buer
authors.forename: Astrid Maria
authors.initials: AM
authors.lastname: Westendorf
authors.forename: Matthias
authors.initials: M
authors.lastname: Epple
authors.forename: Huimin
authors.initials: H
authors.lastname: Yan
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines / Q000008:administration & dosage / Q000276:immunology*; D018938:Caco-2 Cells; D002130:Calcium Phosphates / Q000008:administration & dosage*; D004337:Drug Carriers / Q000008:administration & dosage*; D005260:Female; D005408:Flagellin / Q000008:administration & dosage / Q000276:immunology*; D006801:Humans; D007113:Immunity, Innate; D007274:Injections, Intraperitoneal; D053583:Interleukin-1beta / Q000378:metabolism; D015850:Interleukin-6 / Q000378:metabolism; D016209:Interleukin-8 / Q000378:metabolism; D051379:Mice; D008810:Mice, Inbred C57BL; D053758:Nanoparticles / Q000008:administration & dosage*; D022223:Vaccines, Subunit / Q000008:administration & dosage / Q000276:immunology
chemical_list: D001428:Bacterial Vaccines; D002130:Calcium Phosphates; D004337:Drug Carriers; D053583:Interleukin-1beta; D015850:Interleukin-6; D016209:Interleukin-8; D022223:Vaccines, Subunit; D005408:Flagellin; C020243:calcium phosphate