A novel dual mechanism-of-action bispecific PD-1-IL-2v armed by a "βγ-only" interleukin-2 variant

Copyright © 2024 Jiang, Chen, Liu, Wang, Feng, Cai, Chang and Zhao..

Introduction: Interleukin-2 (IL-2) is one of the first cytokines to be discovered as an immune agonist for cancer immunotherapy. Biased IL-2 variants had been discovered to eliminate Treg activation or enhance the tumor specific T cell cytotoxicity. However, all the biased IL-2 variants pose the risk to overstimulate immune response at a low-dose range. Here, we introduce a novel dual-MOA bispecific PD-1-IL-2v molecule with great anti-tumor efficacy in a high dosed manner.

Methods: The novel IL-2 variant was designed by structural truncation and shuffling. The single armed bispecific PD-1-IL-2v molecule and IL-2v were studied by immune cell activations in vitro and in vivo and anti-tumor efficacy in mouse model.

Results and discussion: The IL-2 variant in this bispecific antibody only binds to IL-2Rβγ complex in a fast-on/off manner without α, β or γ single receptor binding. This IL-2v mildly activates T and NK cells without over stimulation, meanwhile it diminishes Treg activation compared to the wild type IL-2. This unique bispecific molecule with "βγ-only" IL-2v can not only "in-cis" stimulate and expand CD8 T and NK cells moderately without Treg activation, but also block the PD-1/L1 interaction at a similar dose range with monoclonal antibody.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:15

Enthalten in:

Frontiers in immunology - 15(2024) vom: 28., Seite 1369376

Sprache:

Englisch

Beteiligte Personen:

Jiang, Yongji [VerfasserIn]
Chen, Chuyuan [VerfasserIn]
Liu, Yuan [VerfasserIn]
Wang, Rong [VerfasserIn]
Feng, Chuan [VerfasserIn]
Cai, Lili [VerfasserIn]
Chang, Shuang [VerfasserIn]
Zhao, Lei [VerfasserIn]

Links:

Volltext

Themen:

Bispecific antibody
Cancer immune therapy
Cytokine
IL-2 variant
Interleukin-2
Journal Article
Programmed Cell Death 1 Receptor
T cell activation

Anmerkungen:

Date Completed 22.04.2024

Date Revised 25.04.2024

published: Electronic-eCollection

Citation Status MEDLINE

doi:

10.3389/fimmu.2024.1369376

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM37127401X