Biodegradable nanoparticle delivery of inactivated swine influenza virus vaccine provides heterologous cell-mediated immune response in pigs

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• 作者：Santosh Dhakal^a ; ^b ; Jagadish Hiremath^a ; ^b ; Kathryn Bondra^a ; ^b ; Yashavanth S Lakshmanappa^a ; ^b ; Duan-Liang Shyu^a ; ^b ; Kang Ouyang^a ; ^b ; Kyung-il Kang^a ; ^b ; Basavaraj Binjawadagi^a ; ^b ; Jonathan Goodman^c ; Kairat Tabynov^d ; Steven Krakowka^e ; Balaji Narasimhan^c ; Chang Won Lee^a ; ^b ; Gourapura J. Renukaradhya^a ; ^b ; ^{gourapura.1@osu.edu}
• 关键词：Swine influenza virus ; PLGA nanoparticles ; Intranasal vaccination ; Pigs ; Immune response ; T cells
• 刊名：Journal of Controlled Release
• 出版年：2017
• 出版时间：10 February 2017
• 年：2017
• 卷：247
• 期：Complete
• 页码：194-205
• 全文大小：1527 K
• 卷排序：247

文摘

Swine influenza virus (SwIV) is one of the important zoonotic pathogens. Current flu vaccines have failed to provide cross-protection against evolving viruses in the field. Poly(lactic-co-glycolic acid) (PLGA) is a biodegradable FDA approved polymer and widely used in drug and vaccine delivery. In this study, inactivated SwIV H1N2 antigens (KAg) encapsulated in PLGA nanoparticles (PLGA-KAg) were prepared, which were spherical in shape with 200 to 300 nm diameter, and induced maturation of antigen presenting cells in vitro. Pigs vaccinated twice with PLGA-KAg via intranasal route showed increased antigen specific lymphocyte proliferation and enhanced the frequency of T-helper/memory and cytotoxic T cells (CTLs) in peripheral blood mononuclear cells (PBMCs). In PLGA-KAg vaccinated and heterologous SwIV H1N1 challenged pigs, clinical flu symptoms were absent, while the control pigs had fever for four days. Grossly and microscopically, reduced lung pathology and viral antigenic mass in the lung sections with clearance of infectious challenge virus in most of the PLGA-KAg vaccinated pig lung airways were observed. Immunologically, PLGA-KAg vaccine irrespective of not significantly boosting the mucosal antibody response, it augmented the frequency of IFN-γ secreting total T cells, T-helper and CTLs against both H1N2 and H1N1 SwIV. In summary, inactivated influenza virus delivered through PLGA-NPs reduced the clinical disease and induced cross-protective cell-mediated immune response in a pig model. Our data confirmed the utility of a pig model for intranasal particulate flu vaccine delivery platform to control flu in humans.