A self-assembled graphene oxide adjuvant induces both enhanced humoral and cellular immune responses in influenza vaccine

J Control Release. 2024 Jan:365:716-728. doi: 10.1016/j.jconrel.2023.11.047. Epub 2023 Dec 11.

Abstract

Antiviral vaccine is essential for preventing and controlling virus spreading, along with declining morbidity and mortality. A major challenge in effective vaccination lies in the ability to enhance both the humoral and cellular immune responses by adjuvants. Herein, self-assembled nanoparticles based on graphene oxide quantum dots with components of carnosine, resiquimod and Zn2+ ions, namely ZnGC-R, are designed as a new adjuvant for influenza vaccine. With its high capability for antigen-loading, ZnGC-R enhances antigen utilization, improves DC recruitment, and activates antigen-presenting cells. Single cell analysis of lymphocytes after intramuscular vaccination revealed that ZnGC-R generated multifaceted immune responses. ZnGC-R stimulated robust CD4+CCR7loPD-1hi Tfh and durable CD8+CD44hiCD62L- TEM immune responses, and simultaneously promoted the proliferation of CD26+ germinal center B cells. Besides, ZnGC-R elicited 2.53-fold higher hemagglutination-inhibiting antibody than commercial-licensed aluminum salt adjuvant. ZnGC-R based vaccine induced 342% stronger IgG antibody responses compared with vaccines with inactivated virus alone, leading to 100% in vivo protection efficacy against the H1N1 influenza virus challenge.

Keywords: Adjuvant; Graphene oxide quantum dots; Influenza; Mass cytometry; Vaccine.

MeSH terms

  • Adjuvants, Immunologic / pharmacology
  • Adjuvants, Pharmaceutic / pharmacology
  • Antibodies, Viral
  • Graphite*
  • Humans
  • Immunity, Cellular
  • Influenza A Virus, H1N1 Subtype*
  • Influenza Vaccines*
  • Orthomyxoviridae Infections* / prevention & control

Substances

  • Influenza Vaccines
  • graphene oxide
  • Adjuvants, Immunologic
  • Adjuvants, Pharmaceutic
  • Antibodies, Viral
  • Graphite