Neoleukin-2 enhances anti-tumour immunity downstream of peptide vaccination targeted by an anti-MHC class II VHH
- Authors
- Crowley, Stephanie J.; Bruck, Patrick T.; Bhuiyan, Md Aladdin; Mitchell-Gears, Amelia; Walsh, Michael J.; Zhangxu, Kevin; Ali, Lestat R.; Jeong, Hee-Jin; Ingram, Jessica R.; Knipe, David M.; Ploegh, Hidde L.; Dougan, Michael; Dougan, Stephanie K.
- Issue Date
- 5-Feb-2020
- Publisher
- ROYAL SOC
- Keywords
- VHH; cancer vaccines; cytokines; cancer immunology; neoantigens; alpaca nanobodies
- Citation
- OPEN BIOLOGY, v.10, no.2
- Journal Title
- OPEN BIOLOGY
- Volume
- 10
- Number
- 2
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/585
- DOI
- 10.1098/rsob.190235
- ISSN
- 2046-2441
- Abstract
- Cancer-specific mutations can lead to peptides of unique sequence presented on MHC class I to CD8 T cells. These neoantigens can be potent tumour-rejection antigens, appear to be the driving force behind responsiveness to anti-CTLA-4 and anti-PD1/L1-based therapies and have been used to develop personalized vaccines. The platform for delivering neoantigen-based vaccines has varied, and further optimization of both platform and adjuvant will be necessary to achieve scalable vaccine products that are therapeutically effective at a reasonable cost. Here, we developed a platform for testing potential CD8 T cell tumour vaccine candidates. We used a high-affinity alpaca-derived VHH against MHC class II to deliver peptides to professional antigen-presenting cells. We show in vitro and in vivo that peptides derived from the model antigen ovalbumin are better able to activate naive ovalbumin-specific CD8 T cells when conjugated to an MHC class II-specific VHH when compared with an irrelevant control VHH. We then used the VHH-peptide platform to evaluate a panel of candidate neoantigens in vivo in a mouse model of pancreatic cancer. None of the candidate neoantigens tested led to protection from tumour challenge; however, we were able to show vaccine-induced CD8 T cell responses to a melanoma self-antigen that was augmented by combination therapy with the synthetic cytokine mimetic Neo2/15.
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Collections - College of Science and Technology > Department of Biological and Chemical Engineering > 1. Journal Articles
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