Article ; Online: Design and Characterization of Novel Antibody-Cytokine Fusion Proteins Based on Interleukin-21.
Antibodies (Basel, Switzerland)
2022 Volume 11, Issue 1
Abstract: Interleukin-21 (IL21) is a pleiotropic cytokine involved in the modulation of both innate and adaptive immunity. IL21 is mainly secreted by natural killer (NK) and activated CD4+ T-cells. The biology of this cytokine can be associated to proinflammatory ... ...
Abstract | Interleukin-21 (IL21) is a pleiotropic cytokine involved in the modulation of both innate and adaptive immunity. IL21 is mainly secreted by natural killer (NK) and activated CD4+ T-cells. The biology of this cytokine can be associated to proinflammatory responses reflecting its potent stimulatory activity of NK and CD8+ T-cells. Here we describe four formats of novel IL21-based antibody-cytokine fusion proteins, targeting the extra domain A (EDA) of fibronectin and explore their potential for cancer treatment. The fusion proteins were designed, expressed, and characterized. F8 in single-chain diabody (scDb) format fused to IL21 at its C-terminus exhibited a promising profile in size exclusion chromatography (SEC) and SDS-PAGE. The lead candidate was further characterized in vitro. A cell-based activity assay on murine cytotoxic T-cells showed that human IL21, compared to murine IL21 partially cross-reacted with the murine receptor. The prototype was able to recognize EDA as demonstrated by immunofluorescence analysis on tumor sections. In an in vivo quantitative biodistribution experiment, F8(scDb)-murine IL21 did not preferentially accumulate at the site of disease after intravenous injection, suggesting that additional protein engineering would be required to improve the tumor-homing properties of IL21-based product. |
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Language | English |
Publishing date | 2022-03-04 |
Publishing country | Switzerland |
Document type | Journal Article |
ZDB-ID | 2661514-9 |
ISSN | 2073-4468 ; 2073-4468 |
ISSN (online) | 2073-4468 |
ISSN | 2073-4468 |
DOI | 10.3390/antib11010019 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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