Proteins comprising amino-terminal proximal shiga toxin a subunit effector regions and cell-targeting immunoglobulin-type binding regions

Patent metadata

Field	Value
Publication number	US-2016376328-A1
Application number	US-201515125126-A
Country	US
Kind code	A1
Filing date	Mar 10, 2015
Priority date	Mar 11, 2014
Publication date	Dec 29, 2016
Grant date	—

Abstract

The present invention provides proteins comprising immunoglobulin-type binding regions for cell-type specific targeting and Shiga toxin A Subunit effector regions for Shiga toxin effector functions (e.g. cellular internalization, directing subcellular routing, and/or cytotoxicity), wherein the binding regions and Shiga toxin effector regions are combined such that the Shiga toxin effector regions are proximal to the amino-terminals of the proteins. The presently disclosed proteins can comprise additional exogenous materials, such as, e.g., antigens, cytotoxic agents, and detection-promoting agents, and are capable of targeted delivery of these additional exogenous materials into the interiors of target cells. The proteins of the present invention have uses in methods such as, e.g., methods involving targeted killing of target cells, delivering exogenous materials into target cells, labeling subcellular compartments of target cells, and diagnosing and/or treating a variety of conditions including cancers, tumors, other growth abnormalities, immune disorders, and microbial infections.

First claim

1 - 33 . (canceled)

34 . A protein comprising
a) an immunoglobulin-type binding region comprising one or more polypeptides and capable of specifically binding at least one extracellular target biomolecule, and b) a Shiga toxin effector region comprising a polypeptide capable of exhibiting at least one Shiga toxin function and having an amino-terminus and a carboxy-terminus;
wherein the immunoglobulin-type binding region polypeptide and the Shiga toxin effector polypeptide are oriented within the protein such that the immunoglobulin-type binding region is more proximal to the carboxy-terminus of the Shiga toxin effector region polypeptide than the amino-terminus of the Shiga toxin effector region polypeptide.

35 . The protein of claim 34 , wherein the immunoglobulin-type binding region comprises the polypeptide selected from the group consisting of:
single-domain antibody fragment, single-chain variable fragment, antibody variable fragment, complementary determining region 3 fragment, constrained FR3-CDR3-FR4 polypeptide, Fd fragment, antigen-binding fragment, fibronectin-derived 10 th fibronectin type III domain, tenascin type III domain, ankyrin repeat motif domain, low-density-lipoprotein-receptor-derived A-domain, lipocalin, Kunitz domain, Protein-A-derived Z domain, gamma-B crystalline-derived domain, ubiquitin-derived domain, Sac7d-derived polypeptide, Fyn-derived SH2 domain, miniprotein, C-type lectin-like domain scaffold, engineered antibody mimic, and any genetically manipulated counterparts of any of the foregoing which retain binding functionality.

36 . The protein of claim 35 , whereby administration of the protein to a first population of cells whose members are physically coupled to extracellular target biomolecule of the immunoglobulin-type binding region of the protein, and a second population of cells whose members are not physically coupled to extracellular target biomolecule of the immunoglobulin-type binding region, the cytotoxic effect of the protein to members of said first population of cells relative to members of said second population of cells is at least 3-fold greater.

37 . The protein of claim 36 , wherein the extracellular target biomolecule is selected from the group consisting of:
CD20, CD22, CD40, CD74, CD79, CD25, CD30, HER2/neu/ErbB2, EGFR, EpCAM, EphB2, prostate-specific membrane antigen, Cripto, CDCP1, endoglin, fibroblast activated protein, Lewis-Y, CD19, CD21, CS1/SLAMF7, CD33, CD52, CD133, EpCAM, CEA, gpA33, mucin, TAG-72, tyrosine-protein kinase transmembrane receptor, carbonic anhydrase IX, folate binding protein, ganglioside GD2, ganglioside GD3, ganglioside GM2, ganglioside Lewis-Y2, VEGFR, Alpha Vbeta3, Alpha5beta1, ErbB1/EGFR, Erb3, c-MET, IGF1R, EphA3, TRAIL-R1, TRAIL-R2, RANK, FAP, tenascin, CD64, mesothelin, BRCA1, MART-1/MelanA, gp100, tyrosinase, TRP-1, TRP-2, MAGE-1, MAGE-3, GAGE-1/2, BAGE, RAGE, NY-ESO-1, CDK-4, beta-catenin, MUM-1, caspase-8, KIAA0205, HPVE6, SART-1, PRAME, carcinoembryonic antigen, prostate specific antigen, prostate stem cell antigen, human aspartyl (asparaginyl) beta-hydroxylase, EphA2, HER3/ErbB-3, MUC1, MART-1/MelanA, gp100, tyrosinase associated antigen, HPV-E7, Epstein-Barr virus antigen, Bcr-Abl, alpha-fetoprotein antigen, 17-A1, bladder tumor antigen, CD38, CD15, CD23, CD53, CD88, CD129, CD183, CD191, CD193, CD244, CD294, CD305, C3AR, FceRIa, galectin-9, mrp-14, PD-L1, Siglec-8, Siglec-10, CD49d, CD13, CD44, CD54, CD63, CD69, CD123, CD193, TLR4, FceRIa, IgE, CD107a, CD203c, CD14, CD68, CD80, CD86, CD105, CD115, F4/80, ILT-3, galectin-3, CD11a-c, GITRL, MHC class I molecule, MHC class II molecule, CD284-TLR4, CD107-Mac3, CD195-CCR5, HLA-DR, CD16/32, CD282-TLR2, CD11c, and any immunogenic fragment of any of the foregoing.

38 . The protein of any one of claims 34 - 37 , wherein the Shiga toxin effector region comprises or consists essentially of the polypeptide sequence selected from the group consisting of:
(i) amino acids 75 to 251 of SEQ ID NO:1, SEQ ID NO:2, or SEQ ID NO:3; (ii) amino acids 1 to 241 of SEQ ID NO:1, SEQ ID NO:2, or SEQ ID NO:3; (iii) amino acids 1 to 251 of SEQ ID NO:1, SEQ ID NO:2, or SEQ ID NO:3; and (iv) amino acids 1 to 261 of SEQ ID NO:1, SEQ ID NO:2, or SEQ ID NO:3.

39 . The protein of claim 37 , wherein the immunoglobulin-type binding region comprises or consists essentially of a polypeptide represented by amino acids 269-508 of any one of SEQ ID NOs: 4, 8, 12, or 16.

40 . The protein of claim 38 , which comprises or consists essentially of a polypeptide represented by any one of SEQ ID NOs: 4-31.

41 . The protein of claim 38 , wherein the Shiga toxin effector region comprises a mutation relative to a naturally occurring A Subunit of a member of the Shiga toxin family which changes the enzymatic activity of the Shiga toxin effector region, the mutation selected from at least one amino acid residue deletion, insertion, or substitution.

42 . The protein of claim 41 , wherein the mutation reduces or eliminates cytotoxicity of the Shiga toxin effector region.

43 . A pharmaceutical composition comprising the protein of any one of claims 34 - 42 and at least one pharmaceutically acceptable excipient or carrier.

44 . A diagnostic composition comprising
the protein of any one of claims 34 - 42 and a detection promoting agent.

45 . A polynucleotide encoding the protein of any one of claims 34 - 42 , or a complement thereof, or a fragment of any of the foregoing.

46 . An expression vector comprising the polynucleotide of claim 45 .

47 . A host cell comprising the polynucleotide of claim 45 or the expression vector of claim 46 .

48 . A method of killing a cell, the method comprising the step of contacting the cell with the protein of any one of claims 34 - 42 or the pharmaceutical composition of claim 43 .

49 . The method of claim 48 , wherein the contacting occurs in vivo.

50 . A method of treating a disease, disorder, or condition in a patient, the method comprising the step of administering to a patient in need thereof a therapeutically effective amount of the protein of any one of claims 34 - 42 or the pharmaceutical composition of claim 43 .

51 . The method of claim 49 , wherein the disease, disorder, or condition is selected from the group consisting of: cancer, a tumor, an immune disorder, and a microbial infection.

52 . The method of claim 50 , wherein the disease, disorder, or condition is selected from the group consisting of:
bone cancer, breast cancer, central/peripheral nervous system cancer, gastrointestinal cancer, germ cell cancer, glandular cancer, head-neck cancer, hematological cancer, kidney-urinary tract cancer, liver cancer, lung/pleura cancer, prostate cancer, sarcoma, skin cancer, and uterine cancer, amyloidosis, ankylosing spondylitis, asthma, Crohn's disease, diabetes, graft rejection, graft-versus-host disease, Hashimoto's thyroiditis, hemolytic uremic syndrome, HIV-related diseases, lupus erythematosus, multiple sclerosis, polyarteritis nodosa, polyarthritis, psoriasis, psoriasis, psoriatic arthritis, rheumatoid arthritis, scleroderma, septic shock, Sjörgren's syndrome, ulcerative colitis, and vasculitis.

53 . A kit comprising the composition of matter of any one of claims 34 - 47 and an additional reagent and/or pharmaceutical delivery device.

Assignees

• Molecular Templates Inc

Inventors

• Poma Eric
• Willert Erin

Classifications

• A61P5/14

  of the thyroid hormones, e.g. T3, T4 · CPC title

• A61P9/00

  Drugs for disorders of the cardiovascular system · CPC title

• A61P3/10

  for hyperglycaemia, e.g. antidiabetics · CPC title

• A61P7/00

  Drugs for disorders of the blood or the extracellular fluid · CPC title

• A61P37/02

  Immunomodulators · CPC title