Mannose derivative and lipid A dually decorated cationic liposomes as an effective cold chain free oral mucosal vaccine adjuvant-delivery system.
To develop convenient, effective cold chain-free subunit vaccines, a mannose-PEG-cholesterol conjugate (MPC) was synthesized as a lectin binding molecule and anchored onto liposomes which entrapped lipid A and model antigen to form a vaccine adjuvant-delivery system targeting antigen presenting cells. With MPC, soy phosphatidylcholine, stearylamine and monophosphoryl lipid A as emulsifiers dissolved in oil phase (O), and sucrose and BSA in water phase (W), the O/W emulsions were prepared and subsequently lyophilized. The lyophilized product was stable enough to be stored at room temperature and, upon rehydration, formed MPC-/lipid A-liposomes (MLLs) with a size under 300 nm and antigen association rates of around 36%. The MLLs given to mice via oral mucosal (o.m.) administration showed no side effects but induced potent immune responses as evidenced by the high levels of IgG in the sera and IgA in the salivary, intestinal and vaginal secretions of mice. High levels of IgG2a and IFN-γ in treated mice revealed that MLLs via o.m. vaccination induced a mixed Th1/Th2 response against antigens, establishing both humoral and cellular immunity. Thus, the MLLs may be a potent cold chain-free oral mucosal vaccine adjuvant-delivery system.
Department of Pharmaceutical Sciences, Shenyang Pharmaceutical University, Shenyang, China.
Ning
N
Wang
Department of Pharmacy, Anhui Medical University, Hefei, China; Department of Pharmacy, Jining Medical College, Sunshine City, China. Electronic address: twangcn@hotmail.com.
Ting
T
Wang
Department of Pharmacy, Anhui Medical University, Hefei, China.
Meiling
M
Zhang
Department of Pharmacy, Anhui Medical University, Hefei, China.
Ruonan
R
Chen
Department of Pharmacy, Anhui Medical University, Hefei, China.
Ruowen
R
Niu
Department of Pharmaceutical Sciences, Shenyang Pharmaceutical University, Shenyang, China. Electronic address: pharmdeng@gmail.com.
Yihui
Y
Deng
D000276:Adjuvants, Immunologic / Q000737:chemistry; D000284:Administration, Oral; D000818:Animals; D002412:Cations; D002470:Cell Survival; D002784:Cholesterol / Q000737:chemistry; D016207:Cytokines / Q000378:metabolism; D004655:Emulsions; D007111:Immunity, Cellular / Q000187:drug effects; D007074:Immunoglobulin G / Q000737:chemistry; D007371:Interferon-gamma / Q000378:metabolism; D008050:Lipid A / Q000737:chemistry*; D008055:Lipids / Q000737:chemistry; D008081:Liposomes / Q000737:chemistry*; D008214:Lymphocytes / Q000166:cytology; D008358:Mannose / Q000737:chemistry*; D051379:Mice; D009061:Mouth Mucosa / Q000187:drug effects / Q000378:metabolism*; D009092:Mucous Membrane / Q000473:pathology; D010587:Phagocytosis; D011092:Polyethylene Glycols / Q000737:chemistry; D012710:Serum Albumin, Bovine / Q000737:chemistry; D013154:Spleen / Q000187:drug effects; D013696:Temperature; D014612:Vaccines / Q000737:chemistry*
D000276:Adjuvants, Immunologic; D002412:Cations; D016207:Cytokines; D004655:Emulsions; D007074:Immunoglobulin G; D008050:Lipid A; D008055:Lipids; D008081:Liposomes; D014612:Vaccines; D012710:Serum Albumin, Bovine; D011092:Polyethylene Glycols; D007371:Interferon-gamma; D002784:Cholesterol; D008358:Mannose
Cold chain; Immune response; Lyophilization; Mucosa associated lymphoid tissue; Pathogen-associated molecular pattern; Vaccine adjuvant-delivery system