8RY2 | pdb_00008ry2

Crystal Structure of ANV419, a novel IL-2/anti-IL-2 antibody fusion protein

PDB DOI: https://doi.org/10.2210/pdb8RY2/pdb

Classification: CYTOKINE
Organism(s): Homo sapiens
Expression System: Homo sapiens
Mutation(s): No

Deposited: 2024-02-08 Released: 2024-07-31
Deposition Author(s): Rondeau, J.M., Wirth, E.
Funding Organization(s): Not funded

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.05 Å
R-Value Free:
0.224 (Depositor), 0.203 (DCC)
R-Value Work:
0.190 (Depositor), 0.205 (DCC)
R-Value Observed:
0.192 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

This is version 1.1 of the entry. See complete history.

Literature

Discovery and development of ANV419, an IL-2/anti-IL-2 antibody fusion protein with potent CD8+ T and natural killer cell-stimulating capacity for cancer immunotherapy.

Murer, P., Brannetti, B., Rondeau, J.M., Petersen, L., Egli, N., Popp, S., Regnier, C., Richter, K., Katopodis, A., Huber, C.

(2024) MAbs 16: 2381891-2381891

PubMed: 39041287 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1080/19420862.2024.2381891
Primary Citation Related Structures:
8RY2

PubMed Abstract:
Novel engineered IL-2 agonists strive to increase the therapeutic window of aldesleukin (human IL-2) by increasing selectivity toward effector over regulatory T cells and reducing dose-limiting toxicities. Here we describe ANV419, an IL-2/anti-IL2 antibody fusion protein designed for selective IL-2 receptor βγ (IL-2 Rβγ) activation by sterically hindering IL-2 from binding to IL-2 Rα. The fusion protein has an IL-2 connected to the light chain complementarity-determining region (CDR) domain of a humanized antibody that binds to IL-2 at the same epitope as IL-2 Rα. Optimization of the selectivity and pharmacological properties led to the selection of ANV419. ANV419 preferentially expands CD8 ⁺ T cells and natural killer (NK) cells over T _regs and can be safely administered at doses that elicit strong pharmacodynamic effects and efficacy in mouse tumor models. Its anti-tumor efficacy was enhanced when combined with programmed cell death protein 1 (PD-1) or cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) checkpoint inhibitors. ANV419 also enhances the NK cell killing capacity and increases tumor growth inhibition when used alongside trastuzumab in a Her-2 ⁺ xenograft mouse model. In cynomolgus monkeys, the estimated half-life of ANV419 is 24 h, and doses that induced sustained expansion of effector cells were well tolerated without the severe toxicities typically observed with high-dose IL-2. These data support the clinical development of ANV419 in solid tumors and hematological malignancies as monotherapy and in combination with checkpoint inhibitors or agents that induce antibody-dependent cellular cytotoxicity. ANV419 is currently in Phase 1/2 clinical development and may provide cancer patients with a wider therapeutic window than aldesleukin.