Synthesis, characterization, and immune efficacy of layered double hydroxide@SiO2 nanoparticles with shell-core structure as a delivery carrier for Newcastle disease virus DNA vaccine.
Layered double hydroxide (LDH)@SiO2 nanoparticles were developed as a delivery carrier for the plasmid DNA expressing the Newcastle disease virus F gene. The LDH was hydrotalcite-like materials. The plasmid DNA encapsulated in the LDH@SiO2 nanoparticles (pFDNA-LDH@SiO2-NPs) was prepared by the coprecipitation method, and the properties of pFDNA-LDH@SiO2-NPs were characterized by transmission electron microscopy, zeta potential analyzer, Fourier transform infrared spectroscopy, and X-ray diffraction analysis. The results demonstrated that the pFDNA-LDH@SiO2-NPs had a regular morphology and high stability with a mean diameter of 371.93 nm, loading capacity of 39.66%±0.45%, and a zeta potential of +31.63 mV. A release assay in vitro showed that up to 91.36% of the total plasmid DNA could be sustainably released from the pFDNA-LDH@SiO2-NPs within 288 hours. The LDH@SiO2 nanoparticles had very low toxicity. Additionally, their high transfection efficiency in vitro was detected by fluorescent microscopy. Intranasal immunization of specific pathogen-free chickens with pFDNA-LDH@SiO2-NPs induced stronger cellular, humoral, and mucosal immune responses and achieved a greater sustained release effect than intramuscular naked plasmid DNA, and the protective efficacy after challenge with the strain F48E9 with highly virulent (mean death time of chicken embryos ≤60 hours, intracerebral pathogenicity index in 1 -day-old chickens >1.6) was 100%. Based on the results, LDH@SiO2 nanoparticles can be used as a delivery carrier for mucosal immunity of Newcastle disease DNA vaccine, and have great application potential in the future.
Key Laboratory of Microbiology, School of Life Science, Heilongjiang University, Harbin, People's Republic of China.
Kai
K
Zhao
Key Laboratory of Microbiology, School of Life Science, Heilongjiang University, Harbin, People's Republic of China ; Department of Avian Infectious Disease, Shanghai Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Shanghai, People's Republic of China.
Guangyu
G
Rong
Key Laboratory of Microbiology, School of Life Science, Heilongjiang University, Harbin, People's Republic of China.
Chen
C
Guo
Key Laboratory of Microbiology, School of Life Science, Heilongjiang University, Harbin, People's Republic of China.
Xiaomei
X
Luo
Key Laboratory of Microbiology, School of Life Science, Heilongjiang University, Harbin, People's Republic of China.
Hong
H
Kang
Key Laboratory of Microbiology, School of Life Science, Heilongjiang University, Harbin, People's Republic of China ; Division of Swine Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin, People's Republic of China.
Yanwei
Y
Sun
Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion, Heilongjiang University, Harbin, People's Republic of China.
Chunxiao
C
Dai
Key Laboratory of Microbiology, School of Life Science, Heilongjiang University, Harbin, People's Republic of China.
Xiaohua
X
Wang
Key Laboratory of Microbiology, School of Life Science, Heilongjiang University, Harbin, People's Republic of China.
Xin
X
Wang
Key Laboratory of Chemical Engineering Process and Technology for High-efficiency Conversion, Heilongjiang University, Harbin, People's Republic of China.
Zheng
Z
Jin
Division of Swine Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin, People's Republic of China.
Shangjin
S
Cui
Key Laboratory of Microbiology, School of Life Science, Heilongjiang University, Harbin, People's Republic of China.
Qingshen
Q
Sun
D000818:Animals; D002645:Chickens; D004279:DNA, Viral / Q000235:genetics; D006878:Hydroxides / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D009521:Newcastle Disease / Q000276:immunology / Q000517:prevention & control / Q000821:virology; D009522:Newcastle disease virus / Q000235:genetics*; D010957:Plasmids; D012822:Silicon Dioxide / Q000737:chemistry; D014162:Transfection; D019444:Vaccines, DNA / Q000138:chemical synthesis / Q000737:chemistry / Q000276:immunology; D014765:Viral Vaccines / Q000138:chemical synthesis / Q000737:chemistry / Q000276:immunology
D004279:DNA, Viral; D006878:Hydroxides; D019444:Vaccines, DNA; D014765:Viral Vaccines; D012822:Silicon Dioxide
Cytotoxicity; IgA; LDH@SiO2 nanoparticles; Newcastle disease; mucosal immunity