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Mohsen MO, Heath MD, Cabral-Miranda G, Lipp C, Zeltins A, Sande M, Stein JV, Riether C, Roesti E, Zha L, Engeroff P, El-Turabi A, Kundig TM, Vogel M, Skinner MA, Speiser DE, Knuth A, Kramer MF, Bachmann MF. Vaccination with nanoparticles combined with micro-adjuvants protects against cancer. J Immunother Cancer 2019; 7:114. [PMID: 31027511 PMCID: PMC6485085 DOI: 10.1186/s40425-019-0587-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 04/02/2019] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Induction of strong T cell responses, in particular cytotoxic T cells, is a key for the generation of efficacious therapeutic cancer vaccines which yet, remains a major challenge for the vaccine developing world. Here we demonstrate that it is possible to harness the physiological properties of the lymphatic system to optimize the induction of a protective T cell response. Indeed, the lymphatic system sharply distinguishes between nanoscale and microscale particles. The former reaches the fenestrated lymphatic system via diffusion, while the latter either need to be transported by dendritic cells or form a local depot. METHODS Our previously developed cucumber-mosaic virus-derived nanoparticles termed (CuMVTT-VLPs) incorporating a universal Tetanus toxoid epitope TT830-843 were assessed for their draining kinetics using stereomicroscopic imaging. A nano-vaccine has been generated by coupling p33 epitope as a model antigen to CuMVTT-VLPs using bio-orthogonal Cu-free click chemistry. The CuMVTT-p33 nano-sized vaccine has been next formulated with the micron-sized microcrystalline tyrosine (MCT) adjuvant and the formed depot effect was studied using confocal microscopy and trafficking experiments. The immunogenicity of the nanoparticles combined with the micron-sized adjuvant was next assessed in an aggressive transplanted murine melanoma model. The obtained results were compared to other commonly used adjuvants such as B type CpGs and Alum. RESULTS Our results showed that CuMVTT-VLPs can efficiently and rapidly drain into the lymphatic system due to their nano-size of ~ 30 nm. However, formulating the nanoparticles with the micron-sized MCT adjuvant of ~ 5 μM resulted in a local depot for the nanoparticles and a longer exposure time for the immune system. The preclinical nano-vaccine CuMVTT-p33 formulated with the micron-sized MCT adjuvant has enhanced the specific T cell response in the stringent B16F10p33 murine melanoma model. Furthermore, the micron-sized MCT adjuvant was as potent as B type CpGs and clearly superior to the commonly used Alum adjuvant when total CD8+, specific p33 T cell response or tumour protection were assessed. CONCLUSION The combination of nano- and micro-particles may optimally harness the physiological properties of the lymphatic system. Since the nanoparticles are well defined virus-like particles and the micron-sized adjuvant MCT has been used for decades in allergen-specific desensitization, this approach may readily be translated to the clinic.
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Affiliation(s)
- Mona O Mohsen
- Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK. .,Department of BioMedical Research, Immunology RIA, Inselspital, University of Bern, Bern, Switzerland. .,National Center for Cancer Care & Research (NCCCR), Doha, State of Qatar.
| | | | - Gustavo Cabral-Miranda
- Department of BioMedical Research, Immunology RIA, Inselspital, University of Bern, Bern, Switzerland
| | - Cyrill Lipp
- Department of BioMedical Research, Immunology RIA, Inselspital, University of Bern, Bern, Switzerland
| | - Andris Zeltins
- Latvian Biomedical Research & Study Centre, Riga, Latvia
| | - Marcos Sande
- Institute of anatomy, University of Bern, Bern, Switzerland
| | - Jens V Stein
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Carsten Riether
- Department of Medical Oncology, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Elisa Roesti
- Department of BioMedical Research, Immunology RIA, Inselspital, University of Bern, Bern, Switzerland
| | - Lisha Zha
- Department of BioMedical Research, Immunology RIA, Inselspital, University of Bern, Bern, Switzerland.,International Immunology Center, Anhui Agricultural University, Hefei, Anhui, China
| | - Paul Engeroff
- Department of BioMedical Research, Immunology RIA, Inselspital, University of Bern, Bern, Switzerland
| | - Aadil El-Turabi
- Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Thomas M Kundig
- Department of dermatology, University of Zurich, Zurich, Switzerland
| | - Monique Vogel
- Department of BioMedical Research, Immunology RIA, Inselspital, University of Bern, Bern, Switzerland
| | | | - Daniel E Speiser
- Department of Oncology, University of Lausanne, Lausanne, Switzerland
| | - Alexander Knuth
- National Center for Cancer Care & Research (NCCCR), Doha, State of Qatar
| | | | - Martin F Bachmann
- Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK.,Department of BioMedical Research, Immunology RIA, Inselspital, University of Bern, Bern, Switzerland
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