Journal
BIOACTIVE MATERIALS
Volume 7, Issue -, Pages 167-180Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.bioactmat.2021.05.036
Keywords
Gene delivery; PD-L1 blockade; Targeted vaccine; Nanovaccines; Tumor immunotherapy
Funding
- National Natural Science Foundation of China [51925305, 51873208, 51973217, 51520105004, 51803210]
- National Science and Technology Major Projects for Major New Drugs Innovation and Development [2018ZX09711003-012]
- Jilin Province Science and Technology Development Program [20180414027GH, 20200201075JC]
Ask authors/readers for more resources
This study explores an intensive tumor immunotherapeutic strategy by combining mannosylated nanovaccines with gene regulated PD-L1 blockade. The mannose modified nanovaccines can effectively co-encapsulate antigen and adjuvant, promoting endocytosis and cross presentation in dendritic cells. However, the limited inhibition of tumor growth by nanovaccines in the immunosuppressed tumor microenvironment can be overcome by combining with gene regulated PD-L1 blockade, leading to significant tumor remission.
Tumor nanovaccines have potential applications in the prevention and treatment of malignant tumors. However, it remains a longstanding challenge in exploiting efficient nanocarriers for inducing potent specifically cellular immune responses. Toward this objective, we herein explore an intensive tumor immunotherapeutic strategy by combining mannosylated nanovaccines and gene regulated PD-L1 blockade for immune stimulation and killing activity. Here, we fabricate a mannose modified PLL-RT (Man-PLL-RT) mediated nanovaccines with dendritic cells (DCs) targeting capacity. Man-PLL-RT is capable of co-encapsulating with antigen (ovalbumin, OVA) and adjuvant (unmethylated cytosine-phosphate-guanine, CpG) by electrostatic interaction. This positively charged Man-PLL-RT/OVA/CpG nanovaccines can facilitate the endocytosis, maturation and cross presentation in DCs. However, the nanovaccines arouse limited inhibition of tumor growth, which is mainly due to the immunosuppressed microenvironment of tumors. Combining tumor nanovaccines with gene regulated PD-L1 blockade leads to an obvious tumor remission in B16F10 melanoma bearing mice. The collaborative strategy provides essential insights to boost the benefits of tumor vaccines by regulating the checkpoint blockade with gene therapy.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available