Biodistribution and lymph node retention of polysaccharide-based immunostimulating nanocapsules

Sara Vicente, Beth A. Goins, Alejandro Sanchez, María J. Alonso, William T Phillips

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The adjuvant properties of polyglucosamine/squalene-based nanocapsules (PG-nanocapsules) associated with different subunit antigens has been previously reported. Thus, the aim of the present study was to monitor the biodistribution of PG-nanocapsules and their affinity for the draining lymph nodes after subcutaneous (s.c.) injection. The nanocapsules were efficiently radiolabeled with indium-111 (111In) (labeling efficiency of 98%). The diameter and zeta potential values of the unlabeled nanocapsules was preserved after the radiolabeling process and only 20% of the 111In dissociated from the nanocapsules after 48h of incubation in serum. The radiolabeled nanocapsules and the control 111InCl3 in saline solution (18.5MBq (500μCi) in 100μL) were injected s.c. in New Zealand White rabbits. The γ-scintigraphy imaging analysis revealed a slow clearance of the nanocapsules from the injection site and their progressive accumulation in the popliteal lymph node over time (3.8%±1.2 of the injected dose at 48h). Indeed, the clearance rate of the nanocapsules from the injection site was significantly slower than that of the control (free 111InCl3), which rapidly drained into systemic circulation and accumulated mainly in excretion organs (i.e. kidneys and liver). In contrast, the biodistribution of nanocapsules was preferably limited to the lymphatic circulation. These results suggest that the immune potentiating effect previously observed for PG-nanocapsules is mainly due to the formation of a depot at the injection site, which was followed by a slow drainage into the lymphatic system and a prolonged retention in the lymph nodes.

Original languageEnglish (US)
Pages (from-to)1685-1692
Number of pages8
JournalVaccine
Volume32
Issue number15
DOIs
StatePublished - Mar 26 2014

Fingerprint

nanocapsules
Nanocapsules
Polysaccharides
lymph nodes
polysaccharides
Lymph Nodes
Squalene
squalene
injection site
Injections
indium
lymphatic system
radiolabeling
Lymphatic System
scintigraphy
Indium
New Zealand White rabbit
subcutaneous injection
Subcutaneous Injections
Sodium Chloride

Keywords

  • Biodistribution
  • Chitosan
  • Imaging
  • Lymph node
  • Nanocarrier
  • Nanovaccine

ASJC Scopus subject areas

  • Immunology and Microbiology(all)
  • Infectious Diseases
  • Public Health, Environmental and Occupational Health
  • veterinary(all)
  • Molecular Medicine

Cite this

Vicente, S., Goins, B. A., Sanchez, A., Alonso, M. J., & Phillips, W. T. (2014). Biodistribution and lymph node retention of polysaccharide-based immunostimulating nanocapsules. Vaccine, 32(15), 1685-1692. https://doi.org/10.1016/j.vaccine.2014.01.059

Biodistribution and lymph node retention of polysaccharide-based immunostimulating nanocapsules. / Vicente, Sara; Goins, Beth A.; Sanchez, Alejandro; Alonso, María J.; Phillips, William T.

In: Vaccine, Vol. 32, No. 15, 26.03.2014, p. 1685-1692.

Research output: Contribution to journalArticle

Vicente, S, Goins, BA, Sanchez, A, Alonso, MJ & Phillips, WT 2014, 'Biodistribution and lymph node retention of polysaccharide-based immunostimulating nanocapsules', Vaccine, vol. 32, no. 15, pp. 1685-1692. https://doi.org/10.1016/j.vaccine.2014.01.059
Vicente, Sara ; Goins, Beth A. ; Sanchez, Alejandro ; Alonso, María J. ; Phillips, William T. / Biodistribution and lymph node retention of polysaccharide-based immunostimulating nanocapsules. In: Vaccine. 2014 ; Vol. 32, No. 15. pp. 1685-1692.
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