Compositions and methods for targeted immunomodulatory antibodies and fusion proteins

• US 10,442,860 B2
• Filed: 11/28/2016
• Issued: 10/15/2019
• Est. Priority Date: 03/05/2010
• Status: Active Grant

• Current Assignee: Johns Hopkins University
• Original Assignee: Johns Hopkins University
• Inventors: Bedi, Atul, Ravi, Rajani
• Primary Examiner(s): Shafer, Shulamith H
• Application Number:
  US15/362,632
• Publication Number:
  US 20170158770A1
• Time in Patent Office: 1,051 Days
• Field of Search: None
• CPC Class Codes: A61K 2039/505 comprising antibodies
• CPC Class Codes: A61K 2039/572 cytotoxic response
• CPC Class Codes: A61K 31/704 attached to a condensed carbocyclic ring system, e.g. sennosides, thiocolchicosides, escin, daunorubicin digitoxin A61K31/7048
• CPC Class Codes: A61K 38/179 for growth factors; for growth regulators
• CPC Class Codes: A61K 39/3955 against proteinaceous materials, e.g. enzymes, hormones, lymphokines
• CPC Class Codes: A61K 39/39558 against tumor tissues, cells, antigens
• CPC Class Codes: A61K 45/06 Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• CPC Class Codes: A61K 47/6803 Drugs conjugated to an antibody or immunoglobulin, e.g. cisplatin-antibody conjugates
• CPC Class Codes: A61P 29/00 Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
• CPC Class Codes: A61P 35/00 Antineoplastic agents
• CPC Class Codes: A61P 37/00 Drugs for immunological or allergic disorders
• CPC Class Codes: A61P 37/02 Immunomodulators
• CPC Class Codes: A61P 37/04 Immunostimulants
• CPC Class Codes: A61P 37/06 Immunosuppressants, e.g. drugs for graft rejection
• CPC Class Codes: A61P 43/00 Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
• CPC Class Codes: C07K 14/495 Transforming growth factor [TGF]
• CPC Class Codes: C07K 14/70532 B7 molecules, e.g. CD80, CD86
• CPC Class Codes: C07K 14/70575 NGF/TNF-superfamily, e.g. CD70, CD95L, CD153, CD154 NGF C07K14/48, TNF C07K14/525
• CPC Class Codes: C07K 14/70578 NGF-receptor/TNF-receptor superfamily, e.g. CD27, CD30, CD40, CD95 NGF-receptor C07K14/71, TNF-receptor C07K14/7151
• CPC Class Codes: C07K 14/70596 Molecules with a "CD"-designation not provided for elsewhere
• CPC Class Codes: C07K 14/71 : for growth factors; for growth regulators
• CPC Class Codes: C07K 16/28 : against receptors, cell surface antigens or cell surface determinants
• CPC Class Codes: C07K 16/2812 : against CD4
• CPC Class Codes: C07K 16/2815 : against CD8
• CPC Class Codes: C07K 16/2827 : against B7 molecules, e.g. CD80, CD86
• CPC Class Codes: C07K 16/2851 : against the lectin superfamily, e.g. CD23, CD72
• CPC Class Codes: C07K 16/2863 : against receptors for growth factors, growth regulators
• CPC Class Codes: C07K 16/2866 : against receptors for cytokines, lymphokines, interferons
• CPC Class Codes: C07K 16/30 : from tumour cells
• CPC Class Codes: C07K 19/00 : Hybrid peptides , i.e. peptides covalently bound to nucleic acids, or non-covalently bound protein-protein complexes
• CPC Class Codes: C07K 2317/33 : Crossreactivity, e.g. for species or epitope, or lack of said crossreactivity
• CPC Class Codes: C07K 2317/526 : CH3 domain
• CPC Class Codes: C07K 2317/622 : Single chain antibody (scFv)
• CPC Class Codes: C07K 2317/73 : Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
• CPC Class Codes: C07K 2317/76 : Antagonist effect on antigen, e.g. neutralization or inhibition of binding
• CPC Class Codes: C07K 2319/00 : Fusion polypeptide
• CPC Class Codes: C07K 2319/70 : containing domain for protein-protein interaction

Abstract

The present invention is based on the seminal discovery that targeted immunomodulatory antibodies and fusion proteins can counter act or reverse immune tolerance of cancer cells. Cancer cells are able to escape elimination by chemotherapeutic agents or tumor-targeted antibodies via specific immunosuppressive mechanisms in the tumor microenvironment and such ability of cancer cells is recognized as immune tolerance. Such immunosuppressive mechanisms include immunosuppressive cytokines (for example, Transforming growth factor beta (TGF-β)) and regulatory T cells and/or immunosuppressive myeloid dendritic cells (DCs). By counteracting tumor-induced immune tolerance, the present invention provides effective compositions and methods for cancer treatment, optional in combination with another existing cancer treatment. The present invention provides strategies to counteract tumor-induced immune tolerance and enhance the antitumor efficacy of chemotherapy by activating and leveraging T cell-mediated adaptive antitumor immunity against resistant or disseminated cancer cells.

Claims

1. An isolated molecule comprising:

(a) a targeting moiety that is a polypeptide that specifically binds Interleukin-6 Receptor (IL6R); and

(b) an immunomodulatory moiety comprising an amino acid sequence of the extracellular domain of Transforming growth factor-beta receptor (TGFβ

R) or a fragment thereof, wherein the immunomodulatory moiety comprises an amino acid sequence of the extracellular domain of Transforming growth factor-beta receptor selected from the group consisting of SEQ ID NO;

79-91 or fragment thereof.

2. The molecule of claim 1, wherein the targeting moiety comprises an antibody, antibody fragment, antigen-binding domain of an immunoglobulin, single chain variable fragment (scFv), Fc-containing polypeptide, or fusion protein that specifically binds IL6R or a fragment thereof.

3. The molecule of claim 2, wherein the targeting moiety comprises the amino acid sequence corresponding to the heavy chain or light chain of an antibody that specifically binds IL6R.

4. The molecule of claim 1, wherein the immunomodulatory moiety comprises an amino acid sequence of the extracellular domain of Transforming growth factor-beta receptor II (TGFβ

RII) or a binding fragment thereof.

5. The molecule of claim 4, wherein the immunomodulatory moiety comprises the amino acid sequence corresponding to SEQ ID NO:

87 or a binding fragment thereof.

6. The molecule of claim 1, wherein said immunomodulatory moiety is fused to the heavy chain or light chain of said targeting moiety comprising an antibody or to the C-terminus or N-terminus of said targeting moiety.

7. The molecule of claim 1, wherein the targeting moiety is fused to the immunomodulatory moiety via a linker.

8. The molecule of claim 1, wherein the targeting moiety is an Fc-containing polypeptide further comprising a linker at the CH3 region of the Fc.

9. The molecule of claim 8, wherein the linker is (GGGGS)_n (SEQ ID NO:

123) and wherein n is 1, 2, 3, 4, 5, 6, 7 or 8.

10. The isolated molecule of claim 9, wherein the linker comprises the amino acid sequence GGGGSGGGGSGGGGS (SEQ ID NO:

104).