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Ruzicka, M.* ; Koenig, L.M. ; Formisano, S.* ; Boehmer, D.F.R.* ; Vick, B. ; Heuer, E.M.* ; Meinl, H.* ; Kocheise, L.* ; Zeitlhöfler, M.* ; Ahlfeld, J. ; Kobold, S.* ; Endres, S. ; Subklewe, M.* ; Duewell, P.* ; Schnurr, M.* ; Jeremias, I. ; Lichtenegger, F.S.* ; Rothenfusser, S.

RIG-I-based immunotherapy enhances survival in preclinical AML models and sensitizes AML cells to checkpoint blockade.

Leukemia 34, 1017-1026 (2020)
Publ. Version/Full Text Research data DOI PMC
Open Access Gold (Paid Option)
Creative Commons Lizenzvertrag
Retinoic acid-inducible gene-I (RIG-I) is a cytoplasmic immune receptor sensing viral RNA. It triggers the release of type I interferons (IFN) and proinflammatory cytokines inducing an adaptive cellular immune response. We investigated the therapeutic potential of systemic RIG-I activation by short 5 '-triphosphate-modified RNA (ppp-RNA) for the treatment of acute myeloid leukemia (AML) in the syngeneic murine C1498 AML tumor model. ppp-RNA treatment significantly reduced tumor burden, delayed disease onset and led to complete remission including immunological memory formation in a substantial proportion of animals. Therapy-induced tumor rejection was dependent on CD4(+) and CD8(+) T cells, but not on NK or B cells, and relied on intact IFN and mitochondrial antiviral signaling protein (MAVS) signaling in the host. Interestingly, ppp-RNA treatment induced programmed death ligand 1 (PD-L1) expression on AML cells and established therapeutic sensitivity to anti-PD-1 checkpoint blockade in vivo. In immune-reconstituted humanized mice, ppp-RNA treatment reduced the number of patient-derived xenografted (PDX) AML cells in blood and bone marrow while concomitantly enhancing CD3(+) T cell counts in the respective tissues. Due to its ability to establish a state of full remission and immunological memory, our findings show that ppp-RNA treatment is a promising strategy for the immunotherapy of AML.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Acute Myeloid-leukemia; Double-stranded-rna; Targeted Activation; 5'-triphosphate Rna; Pd-1 Blockade; Apoptosis; Melanoma; Immunity; Responses; Efficacy
ISSN (print) / ISBN 0887-6924
e-ISSN 1476-5551
Journal Leukemia
Quellenangaben Volume: 34, Issue: 4, Pages: 1017-1026 Article Number: , Supplement: ,
Publisher Nature Publishing Group
Publishing Place Macmillan Building, 4 Crinan St, London N1 9xw, England
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Unit for Clinical Pharmacology (KKG-EKLiP)
Research Unit Apoptosis in Hematopoietic Stem Cells (AHS)