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@ARTICLE{Silvestre:284631,
author = {R. N. Silvestre and J. Eitler and J. T. C. de Azevedo and
M. C. Tirapelle and D. M. C. Fantacini and L. E. B. de Souza
and K. Swiech and D. T. Covas and R. T. Calado and P. O.
Montero and K. C. R. Malmegrim and M. L. Figueiredo and T.
Tonn$^*$ and V. Picanço-Castro},
title = {{E}ngineering {NK}-{CAR}.19 cells with the
{IL}-15/{IL}-15{R}α complex improved proliferation and
anti-tumor effect in vivo.},
journal = {Frontiers in immunology},
volume = {14},
issn = {1664-3224},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {DKFZ-2023-02038},
pages = {1226518},
year = {2023},
abstract = {Natural killer 92 (NK-92) cells are an attractive
therapeutic approach as alternative chimeric antigen
receptor (CAR) carriers, different from T cells, once they
can be used in the allogeneic setting. The modest in vivo
outcomes observed with NK-92 cells continue to present
hurdles in successfully translating NK-92 cell therapies
into clinical applications. Adoptive transfer of CAR-NK-92
cells holds out the promise of therapeutic benefit at a
lower rate of adverse events due to the absence of GvHD and
cytokine release syndrome. However, it has not achieved
breakthrough clinical results yet, and further improvement
of CAR-NK-92 cells is necessary.In this study, we conducted
a comparative analysis between CD19-targeted CAR (CAR.19)
co-expressing IL-15 (CAR.19-IL15) with IL-15/IL-15Rα
(CAR.19-IL15/IL15Rα) to promote NK cell proliferation,
activation, and cytotoxic activity against B-cell leukemia.
CAR constructs were cloned into lentiviral vector and
transduced into NK-92 cell line. Potency of CAR-NK cells
were assessed against CD19-expressing cell lines NALM-6 or
Raji in vitro and in vivo in a murine model. Tumor burden
was measured by bioluminescence.We demonstrated that a
fourth- generation CD19-targeted CAR (CAR.19) co-expressing
IL-15 linked to its receptor IL-15/IL-15Rα
(CAR.19-IL-15/IL-15Rα) significantly enhanced NK-92 cell
proliferation, proinflammatory cytokine secretion, and
cytotoxic activity against B-cell cancer cell lines in vitro
and in a xenograft mouse model.Together with the results of
the systematic analysis of the transcriptome of activated
NK-92 CAR variants, this supports the notion that
IL-15/IL-15Rα comprising fourth-generation CARs may
overcome the limitations of NK-92 cell-based targeted tumor
therapies in vivo by providing the necessary growth and
activation signals.},
keywords = {B-cell malignances (Other) / CAR-NK cells (Other) / IL-15
(Other) / IL-15 receptor (Other) / NK-92 (Other) / adoptive
cell therapy (Other) / allogeneic therapy (Other)},
cin = {DD01},
ddc = {610},
cid = {I:(DE-He78)DD01-20160331},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:37818365},
pmc = {pmc:PMC10561086},
doi = {10.3389/fimmu.2023.1226518},
url = {https://inrepo02.dkfz.de/record/284631},
}