Annona muricata l.‐derived polysaccharides as a potential adjuvant to a dendritic cell‐based vaccine in a thymoma‐bearing model

Woo Sik Kim, Jeong Moo Han, Ha Yeon Song, Eui Hong Byun, Seung Taik Lim, Eui Baek Byun

Research output: Contribution to journalArticle

Abstract

Dendritic cells (DCs) are powerful antigen‐presenting cells that are often used to evaluate adjuvants, particularly for adjuvant selection for various vaccines. Here, polysaccharides (named ALP) isolated from leaves of Annona muricata L., which are used in traditional medicine such as for bacterial infections and inflammatory diseases, were evaluated as an adjuvant candidate that can induce anti‐tumor activity. We first confirmed the phenotypic (surface molecules, cytokines, antigen uptake, and antigen‐presenting ability) and functional alterations (T cell proliferation/activation) of DCs in vitro. We also confirmed the adjuvant effect by evaluating anti‐tumor activity and immunity using an ALP‐treated DC‐immunized mouse model. ALP functionally induced DC maturation by up‐regulating the secretion of Th1‐polarizing pro‐inflammatory cytokines, the expression of surface molecules, and antigen‐presenting ability. ALP triggered DC maturation, which is dependent on the activation of the MAPK and NF‐κB signaling pathways. ALP‐activated DCs showed an ample capacity to differentiate naive T cells to Th1 and activated CD8+ T cells effectively. The systemic administration of DCs that pulse ALP and ovalbumin peptides strongly increased cytotoxic T lymphocyte (CTL) activity (by 9.5% compared to that in the control vaccine groups), the generation of CD107a‐producing multifunctional T cells, and Th1‐mediated humoral immunity, and caused a significant reduction (increased protection by 29% over that in control vaccine groups) in tumor growth. ALP, which triggers the Th1 and CTL response, provides a basis for a new adjuvant for various vaccines.

Original languageEnglish
Article number1602
JournalNutrients
Volume12
Issue number6
DOIs
Publication statusPublished - 2020 Jun 1

Keywords

  • Annona muricata L
  • Cytotoxic T lymphocyte
  • Dendritic cells
  • Multifunctional T cells
  • Polysaccharide
  • Th1
  • Vaccine adjuvant

ASJC Scopus subject areas

  • Food Science
  • Nutrition and Dietetics

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