Arcellx, Inc.

Medimmune Limited

Jeffrey S Swers

David M Hilbert

Herren Wu

Manuel Baca

David William Lafleur

Benoy Chacko

Justin Edwards

William Dall'Acqua

Christian B Allan

David Tice

Thomas Thisted

D domain (DD) containing polypeptides (DDpp) that specifically bind targets of interest (e.g., BCMA, CD123, CS1, HER2, AFP, and AFP p26) are provided, as are nucleic acids encoding the DDpp, vectors containing the nucleic acids and host cells containing the nucleic acids and vectors. DDpp such as DDpp fusion proteins, are also provided as are methods of making and using the DDpp. Such uses include, but are not limited to diagnostic and therapeutic applications.

D-domain containing polypeptides and uses thereof

Provided herein are D domain containing polypeptides that specifically bind targets of interest, as are nucleic acids encoding the D domain containing polypeptides, vectors containing the nucleic acids and host cells containing the nucleic acids and vectors. Also provided herein are methods of making and using the D domain containing polypeptides, nucleic acids, vectors and host cells, for example, but not limited to, in diagnostic and therapeutic applications. Also provided herein are multi-functional chimeric antigen receptor (CAR)-based compositions and Adapters and their use in methods of directing immune responses to target cells. In some embodiments, the methods include the use of a CAR expressing cell in combination with an Adapter. The Adapter confers the ability to modulate, alter, and/or direct CAR expressing cell-mediated immune response in vitro and in vivo.

Provided herein are multi-functional chimeric antigen receptor (CAR)-based compositions and their use in directing immune responses to target cells. The compositions have uses that include treating hyperproliferative disorders such as cancer. The provided methods generally include the use of a CAR cell in combination with an Adapter. The Adapter confers the ability to modulate, alter, and/or redirect CAR cell-mediated immune response in vitro and in vivo. In some embodiments, the CAR cell comprises a genetic modification to reduce or eliminate the expression of a targeted antigenic determinant.

Multifunctional immune cell therapies

The present invention provides Tenascin-3 FnIII domain-based multimeric scaffolds that specifically bind to TRAIL Receptor 2 (TRAIL R2), a cell membrane receptor involved in apoptosis. The invention further provides engineered variants with increased affinity for the target, increased stability, and reduced immunogenicity. Furthermore, the present invention is related to engineered multivalent scaffolds as prophylactic, diagnostic, or therapeutic agents, and their uses against diseases caused by cells expressing TRAIL R2, in particular to a therapeutic use against cancer.

TRAIL R2-specific multimeric scaffolds

The invention provides protein scaffolds and methods of preparing, screening, engineering and using such protein scaffolds.

Protein scaffolds

The invention provides method for therapeutic protein drug development that incorporates therapeutic and/or formulation and/or manufacturing considerations in the early screening process. The approach involves screening a plurality of different variants of a domain that have been determined to have the desired therapeutic property to identify one or more variants that have desired therapeutic and/or formulation characteristics, and constructing the full multidomain proteins using the identified domain variants. The present invention also provides a method for determining the shelf life of multidomain proteins in formulations. The method comprises determining a thermal denaturation and/or renaturation curve of a domain of the protein whose unfolding leads to aggregation of the protein in a solution. The method evaluates the shelf life of the multidomain protein based on the denaturation/renaturation curve. The invention also provides methods for engineering multidomain proteins to improve their therapeutic and/or formulation characteristics.

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Gaithersburg, MD, United States of America

Jeffrey S Swers