Antitumor Monoclonal Antibodies Enhance Cross-presentation OfcCellular Antigens and the Generation of Myeloma-specific Killer T Cells by Dendritic Cells
Overview
General Medicine
Affiliations
The mechanism of antitumor effect of monoclonal antibodies (mAbs) is not fully understood. Here we show that coating myeloma cells with anti-syndecan-1 antibody promotes cross-presentation of cellular antigens by dendritic cells (DCs) to autologous T cells from healthy donors. The tumor cells treated with anti-syndecan-1 or isotype-matched control antibody were fed to HLA-mismatched monocyte-derived immature DCs. Tumor cell-loaded mature DCs induced a strong CD8(+) T cell response that was specific for the cancer-testis (C-T) antigens expressed in the tumor. The CD8(+) T cells killed peptide-pulsed targets, as well as myeloma tumor cells. Importantly, mAbs-coated tumor-loaded DCs were consistently superior to DCs loaded with peptides or dying cells for eliciting tumor-specific killer T cells. This enhanced cross-presentation was not due to enhanced tumor cell uptake or to DC maturation. When mixtures of NY-Eso-1-positive and -negative myeloma cells were captured by DCs, the anti-syndecan-1 antibody had to be on the NY-Eso-1-positive cells to elicit NY-Eso-1-specific response. Cross-presentation was inhibited by pretreatment of DCs with Fc gamma receptor blocking antibodies. Targeting of mAb-coated tumors to DCs may contribute to the efficacy of tumor-reactive mAb and offers a new strategy for immunotherapy.
Crescioli S, Jatiani S, Moise L MAbs. 2025; 17(1):2453515.
PMID: 39819511 PMC: 11810086. DOI: 10.1080/19420862.2025.2453515.
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Svirshchevskaya E, Kostenko V, Boyko A, Shevtsov M, Kholodenko R, Grechikhina M Nanomaterials (Basel). 2024; 14(23).
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Hematianlarki M, Nimmerjahn F Immunol Rev. 2024; 328(1):372-386.
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Immunotherapy for ovarian cancer: towards a tailored immunophenotype-based approach.
Ghisoni E, Morotti M, Sarivalasis A, Grimm A, Kandalaft L, Dangaj Laniti D Nat Rev Clin Oncol. 2024; 21(11):801-817.
PMID: 39232212 DOI: 10.1038/s41571-024-00937-4.
Kocoglu M, Luetkens T, Bork J, Baddley J, Omili D, Gebru E Blood Adv. 2024; 8(22):5880-5884.
PMID: 39058975 PMC: 11612371. DOI: 10.1182/bloodadvances.2024012762.