Journal of Translational Medicine | |
A bispecific, crosslinking lectibody activates cytotoxic T cells and induces cancer cell death | |
Research | |
Rajeev Pasupuleti1 Dajana Kolanovic1 Birgit Wiltschi2 Olga N. Makshakova3 Francesca Rosato4 Jana Tomisch4 Winfried Römer5 Ana Valeria Meléndez6 | |
[1] ACIB - The Austrian Centre of Industrial Biotechnology, Graz, Austria;Institute of Molecular Biotechnology, Graz University of Technology, Graz, Austria;ACIB - The Austrian Centre of Industrial Biotechnology, Graz, Austria;Institute of Molecular Biotechnology, Graz University of Technology, Graz, Austria;Institute of Bioprocess Science and Engineering, University of Natural Resources and Life Sciences, Vienna, Austria;Faculty of Biology, University of Freiburg, Freiburg, Germany;Kazan Institute for Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Kazan, Russian Federation;Faculty of Biology, University of Freiburg, Freiburg, Germany;Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany;Faculty of Biology, University of Freiburg, Freiburg, Germany;Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany;Freiburg Institute for Advanced Studies (FRIAS), University of Freiburg, Freiburg, Germany;Faculty of Biology, University of Freiburg, Freiburg, Germany;Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany;Spemann Graduate School of Biology and Medicine, University of Freiburg, Freiburg, Germany; | |
关键词: Lectins; Tumor-associated carbohydrate antigens; Bispecific targeting; Globotriaosylceramide; Click chemistry; Cancer immunotherapy; T cells; Shiga toxin; | |
DOI : 10.1186/s12967-022-03794-w | |
received in 2022-09-12, accepted in 2022-11-24, 发布年份 2022 | |
来源: Springer | |
【 摘 要 】
BackgroundAberrant glycosylation patterns play a crucial role in the development of cancer cells as they promote tumor growth and aggressiveness. Lectins recognize carbohydrate antigens attached to proteins and lipids on cell surfaces and represent potential tools for application in cancer diagnostics and therapy. Among the emerging cancer therapies, immunotherapy has become a promising treatment modality for various hematological and solid malignancies. Here we present an approach to redirect the immune system into fighting cancer by targeting altered glycans at the surface of malignant cells. We developed a so-called “lectibody”, a bispecific construct composed of a lectin linked to an antibody fragment. This lectibody is inspired by bispecific T cell engager (BiTEs) antibodies that recruit cytotoxic T lymphocytes (CTLs) while simultaneously binding to tumor-associated antigens (TAAs) on cancer cells. The tumor-related glycosphingolipid globotriaosylceramide (Gb3) represents the target of this proof-of-concept study. It is recognized with high selectivity by the B-subunit of the pathogen-derived Shiga toxin, presenting opportunities for clinical development.MethodsThe lectibody was realized by conjugating an anti-CD3 single-chain antibody fragment to the B-subunit of Shiga toxin to target Gb3+ cancer cells. The reactive non-canonical amino acid azidolysine (AzK) was inserted at predefined single positions in both proteins. The azido groups were functionalized by bioorthogonal conjugation with individual linkers that facilitated selective coupling via an alternative bioorthogonal click chemistry reaction. In vitro cell-based assays were conducted to evaluate the antitumoral activity of the lectibody. CTLs, Burkitt´s lymphoma-derived cells and colorectal adenocarcinoma cell lines were screened in flow cytometry and cytotoxicity assays for activation and lysis, respectively.ResultsThis proof-of-concept study demonstrates that the lectibody activates T cells for their cytotoxic signaling, redirecting CTLs´ cytotoxicity in a highly selective manner and resulting in nearly complete tumor cell lysis—up to 93%—of Gb3+ tumor cells in vitro.ConclusionsThis research highlights the potential of lectins in targeting certain tumors, with an opportunity for new cancer treatments. When considering a combinatorial strategy, lectin-based platforms of this type offer the possibility to target glycan epitopes on tumor cells and boost the efficacy of current therapies, providing an additional strategy for tumor eradication and improving patient outcomes.
【 授权许可】
CC BY
© The Author(s) 2022
【 预 览 】
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RO202305066618780ZK.pdf | 3339KB | download | |
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MediaObjects/12888_2022_4395_MOESM1_ESM.xlsx | 128KB | Other | download |
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