Cutting-Edge: Unleashing the Potential of γδ T Cells with Novel Nanoparticles for Cancer Immunotherapy Applications

Introduction: Recent research demonstrates that specific variants of gamma delta (γδ) T cells possess innate properties, previously deemed only adaptative. Our understanding of the innate-like behavior of γδ T cells upon encountering virus-like nanoparticles (VLPs) remains limited. Exploring the interaction between γδ T cells and VLPs presents an intriguing avenue for research, offering insights into how VLPs can serve as an effective platform to enhance their expansion and activation. Methods: We created novel plant-derived VLPs, engineered to incorporate TLR ligands to effectively stimulate the innate immune system. This study encompasses in vivo and in vitro assays, FC analysis and RNA sequencing. Results: Our findings demonstrate the robust uptake of our novel VLPs by γδ T cells, leading to significant expansion in draining lymph nodes upon subcutaneous injection. Interestingly, in mice lacking TLR7 or C3, γδ T cell expansion was reduced, suggesting their involvement in the immune response triggered by our VLPs. Subsequent analysis of γδ T cell Vγ1 and Vγ4 subtypes post-VLP administration revealed substantial expansion and distinct activation profiles. Ongoing RNA sequencing will unveil activation pathways, shedding light on the molecular mechanisms underlying their response to our innovative VLPs. Conclusion: Our novel data reveal the innate-like response of γδ T cells to our VLPs, loaded with different innate stimuli. This highlights the rapid and crucial role of γδ T cells in early immune responses, offering insights for potential immunotherapeutic strategies against cancer.