Protective effect of antigen delivery using monoolein-based liposomes in experimental hematogenously disseminated candidiasis

• Type: Article in International Scientific Journal
• Date: 2016-07-15

Authors

Catarina Carneiro (Author) Other; Alexandra Correia (Author) Other; Tânia Lima (Author) Other; Manuel Vilanova (Author) ICBAS; Célia Pais (Author) Other; Andreia C. Gomes (Author) Other; M. Elisabete C. D. Real Oliveira (Author) Other; Paula Sampaio (Author) Other

Journal

Title: Acta Biomaterialia

Vol. 39

Pages: 133-145

ISSN: 1742-7061

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 16 Citations

ISI Web of Science

Scopus - 20 Citations

Pubmed / Medline

Other information

Authenticus ID: P-00K-MS2

DOI: 10.1016/j.actbio.2016.05.001

Abstract (EN): We evaluated the potential of a liposomal antigen delivery system (ADS) containing Candida albicans cell wall surface proteins (CWSP) in mediating protection against systemic candidiasis. Treatment of bone marrow-derived dendritic cells with CWSP-loaded dioctadecyldimethylammonium bromide:monoolein (DODAB:MO) liposomes enhanced and prolonged their activation comparatively to free antigen, indicating that liposome-entrapped CWSP were released more sustainable. Therefore, we immunized mice with CWSP either in a free form or loaded into two different DODAB:MO liposome formulations, respectively designated as ADS-I and ADS2, prior to intravenous C. albicans infection. Immunization with ADS1, but not with ADS2, conferred significant protection to infected mice, comparatively to immunization with CWSP or empty liposomes as control. ADS1-immunized mice presented significantly higher serum levels of C. albicans-specific antibodies that enhanced phagocytosis of this fungus. In these mice, a mixed cytokine production profile was observed encompassing IFN-gamma, IL-4, IL-17A and IL-10. Nevertheless, only production of IL-4, IL-17 and IL-10 was higher than in controls. In this study we demonstrated that DODAB:MO liposomes enhance the immunogenicity of C. albicans antigens and host protection in a murine model of systemic candidiasis. Therefore, this liposomal adjuvant could be a promising candidate to assess in vaccination against this pathogenic fungus. Statement of Significance This work describes the immunomodulation capacity of the previously validated antigen delivery system (ADS) composed by dioctadecyldimethylammonium bromide (DODAB) and monoolein (MO) lipids incorporating the cell wall surface proteins (CWSP) from C. albicans. Here, we not only present the ability of this system in facilitating antigen uptake by DCs in vitro, but also that this system induces higher levels of pro-inflammatory cytokines and opsonizing specific IgG antibodies in serum of mice immunized subcutaneously. We show that the ADS are efficient nanocarrier and modulate the immune response against intravenous C albicans infection favoring mouse protection. In sum, we show that the incorporation of C albicans antigens in DODAB:MO nanocarries are a promising vaccine strategy against C albicans fungal infection.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13