1
|
Sam J, Hofer T, Kuettel C, Claus C, Thom J, Herter S, Georges G, Korfi K, Lechmann M, Eigenmann MJ, Marbach D, Jamois C, Lechner K, Krishnan SM, Gaillard BC, Marinho J, Kronenberg S, Kunz L, Wilson S, Briner S, Gebhardt S, Varol A, Appelt B, Nicolini VG, Speziale D, Bez M, Bommer E, Eckmann J, Hage C, Limani F, Jenni S, Schoenle A, Le Clech M, Vallier JB, Colombetti S, Bacac M, Gasser S, Klein C, Umaña P. CD19-CD28: An affinity-optimized CD28 agonist for combination with glofitamab (CD20-TCB) as off-the-shelf immunotherapy. Blood 2024:blood.2023023381. [PMID: 38437725 DOI: 10.1182/blood.2023023381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/29/2024] [Accepted: 02/16/2024] [Indexed: 03/06/2024] Open
Abstract
Effective T cell responses not only require the engagement of T cell receptors (TCRs, "signal 1"), but also the availability of costimulatory signals ("signal 2"). T cell bispecific antibodies (TCBs) deliver a robust signal 1 by engaging the TCR signaling component CD3ε, while simultaneously binding to tumor antigens. The CD20-TCB glofitamab redirects T cells to CD20-expressing malignant B cells. While glofitamab exhibits strong single agent efficacy, adding costimulatory signaling may enhance the depth and durability of T cell-mediated tumor cell killing. We developed a bispecific CD19-targeted CD28 agonist (RG6333, CD19-CD28) to enhance the efficacy of glofitamab and similar TCBs by delivering signal 2 to tumor-infiltrating T cells. CD19-CD28 distinguishes itself from the superagonistic antibody TGN1412, as its activity requires the simultaneous presence of a TCR signal and CD19 target binding. This is achieved through its engineered format incorporating a mutated Fc region with abolished FcγR and C1q binding, CD28 monovalency, and a moderate CD28 binding affinity. In combination with glofitamab, CD19-CD28 strongly increased T cell effector functions in ex vivo assays using lymphoma patient-derived PBMC and spleen samples, and enhanced glofitamab-mediated regression of aggressive lymphomas in humanized mice. Notably, the triple combination of glofitamab with CD19-CD28 with the costimulatory 4-1BB agonist CD19-4-1BBL, offered substantially improved long-term tumor control over glofitamab monotherapy and respective duplet combinations. Our findings highlight CD19-CD28 as a safe and highly efficacious off-the-shelf combination partner for glofitamab, similar TCBs, and other costimulatory agonists. CD19-CD28 is currently in a Phase 1 clinical trial in combination with glofitamab.
Collapse
Affiliation(s)
- Johannes Sam
- Roche Innovation Center Zürich, Schlieren, Switzerland
| | - Thomas Hofer
- Roche Innovation Center Zürich, Schlieren, Switzerland
| | | | | | - Jenny Thom
- Roche Innovation Center Zürich, Schlieren, Switzerland
| | | | - Guy Georges
- Roche Innovation Center Munich, Penzberg, Germany
| | | | | | | | | | | | | | | | | | - Joana Marinho
- Roche Innovation Center Zürich, Schlieren, Switzerland
| | | | - Leo Kunz
- Roche Innovation Center Zürich, Schlieren, Switzerland
| | - Sabine Wilson
- Roche Innovation Center Welwyn, Welwyn Garden City, United Kingdom
| | | | | | - Ahmet Varol
- Roche Innovation Center Zürich, Schlieren, Switzerland
| | - Birte Appelt
- Roche Innovation Center Zürich, Schlieren, Switzerland
| | | | | | - Miriam Bez
- Roche Innovation Center Zurich, Schlieren, Switzerland
| | - Esther Bommer
- Roche Innovation Center Zürich, Schlieren, Switzerland
| | | | - Carina Hage
- Roche Innovation Center Munich, Penzberg, Germany
| | | | | | - Anne Schoenle
- Roche Pharma Research & Early Development, Schlieren, Switzerland
| | | | | | | | - Marina Bacac
- Roche Pharma Research and Early Development, Schlieren, Switzerland
| | | | | | - Pablo Umaña
- Roche Innovation Center Zurich, Zurich, Switzerland
| |
Collapse
|
3
|
Dawson K, Feurstein D, Fiedler U, Kuster K, Bez M, Schreiner S, Turner D, Tadjalli Mehr K, Stumpp M, Harstrick A, Baird R, Omlin A, Middleton M, Rodon J, Zitt C. Preliminary biomarker and pharmacokinetic analysis from the completed dose escalation part of the first-in-human Phase I study evaluating MP0250, a multi-DARPin® blocking HGF and VEGF-A, in patients with advanced solid tumors. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32995-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
4
|
Abstract
AbstractTerraces have been frequently observed and described along turbidite valleys. Many interpretations have been aimed at determining the origin of these structures, including a tectonic origin, succession of infilling and incision processes, channel-wall slumps, or inner levee aggradation. The Zaire submarine valley presents a complex structure with multiple terraces bordering a deep incised meandering thalweg. The detailed analysis of the morphology, the seismic structure and the recent sedimentation (in cores) along the Zaire upper-fan valley show that terraces are inner levees confined within the incised valley. Many terraces correspond to the infilling of abandoned meanders, and aggrade by deposition of turbidite sequences due to current overflows. The major process affecting the initiation and the development of terraces inside the valley is the vertical incision of the thalweg, simultaneously with meander migration.
Collapse
Affiliation(s)
- N. Babonneau
- IFREMER, Géosciences Marines, Laboratoire Environnements Sédimentaires
BP70, 29280 Plouzané, France
| | - B. Savoye
- IFREMER, Géosciences Marines, Laboratoire Environnements Sédimentaires
BP70, 29280 Plouzané, France
| | - M. Cremer
- Université de Bordeaux I, Département de Géologie et d’Océanologie, Avenue des Facultés
33000 Bordeaux, France
| | - M. Bez
- Totalfinaelf
64018 Pau Cedex, France
| |
Collapse
|