Genetically engineered T cells are a powerful new modality for cancer immunotherapy. However, their clinical application for solid tumors is challenging, and crucial knowledge on cell functionality in vivo is lacking. Here, we fabricated a nanoprobe composed of dendrimers incorporating a calcium sensor and gold nanoparticles, for dual-modal monitoring of engineered T cells within a solid tumor. T cells engineered to express a melanoma-specific T-cell receptor and loaded with the nanoprobe were longitudinally monitored within melanoma xenografts in mice. Fluorescent imaging of the nanoprobe's calcium sensor revealed increased intra-tumoral activation of the T cells over time, up to 24 h. Computed tomography imaging of the nanoprobe's gold nanoparticles revealed the cells' intra-tumoral distribution pattern. Quantitative analysis revealed the intra-tumoral T cell quantities. Thus, this nanoprobe reveals intra-tumoral persistence, penetration and functional status of genetically engineered T cells, which can advance T cell-based immunotherapy and promote next-generation live cell imaging.
|Journal||Nanomedicine: Nanotechnology, Biology, and Medicine|
|State||Published - Nov 2022|
Bibliographical noteFunding Information:
This work was supported by the Israel Ministry of Science and Technology Israel-China cooperation (grant no. 3-15704 ), Ministry of Science and Technology of the People's Republic of China through the National Key Research and Development Program ( 2017YFE0196200 ) in collaboration with Israel Ministry of Science and Technology , and the Science and Technology Commission of Shanghai Municipality ( 18520750400 ) through the one-belt-one-route joint laboratory program.
© 2022 Elsevier Inc.
- Computed tomography
- Fluorescent imaging
- Gold nanoparticles
- T cell tracking