374 results about "EphA Receptors" patented technology

The present invention relates to a genetically engineered, CD19-specific chimeric T cell receptor and to immune cells expressing the chimeric receptor The present invention also relates to the use of such cells for cellular immunotherapy of CD9⁺ malignancies and for abrogating any untoward B cell function. The chimeric receptor is a single chain scFvFc:ζ receptor where scFvFc designates the extracellular domain, scFv designates the V_H and V_L chains of a single chain monoclonal antibody to CD19, Fc represents at least part of a constant region of an IgG₁, and ζ represents the intracellular signaling domain of the zeta chain of human CD3. The extracellular domain scFvFc and the intracellular domain ζ are linked by a transmembrane domain such as the transmembrane domain of CD4. In one aspect, the chimeric receptor comprises amino acids 23-634 of SEQ I DNO:2. The present invention further relates to a method of making a redirected T cell expressing a chimeric T cell receptor by electroporation using naked DNA encoding the receptor.

The present invention relates to ligands which bind to human tumor necrosis factor alpha (TNF) in a manner such that upon binding of these ligands to TNF the biological activity of TNF is modified. In preferred forms the ligand binds to TNF in a manner such that the induction of endothelial procoagulant activity of the TNF is inhibited; the binding of TNF to receptors on endothelial cells is inhibited; the induction of fibrin deposition in the tumor and tumor regression activities of the TNF are enhanced; and the cytotoxicity and receptor binding activities of the TNF are unaffected or enhanced on tumor cells. The ligand is preferably an antibody, F(ab) fragment, single domain antibody (dABs) single chain antibody or a serum binding protein. It is preferred, however, that the ligand is a monoclonal antibody or F(ab) fragment thereof.

Vaccines that target one or more antigens to a cell surface receptor improve the antigen-specific humoral and cellular immune response. Antigen(s) linked to a domain that binds to a cell surface receptor are internalized, carrying antigen(s) into an intracellular compartment where the antigen(s) are digested into peptides and loaded onto MHC molecules. T cells specific for the peptide antigens are activated, leading to an enhanced immune response. The vaccine may comprise antigen(s) linked to a domain that binds at least one receptor or a DNA plasmid encoding antigen(s) linked to a domain that binds at least one receptor. A preferred embodiment of the invention targets HIV-1 env antigen to the CD40 receptor, resulting in delivery of antigen to CD40 positive cells, and selective activation of the CD40 receptor on cells presenting HIV-1 env antigens to T cells.

Oligonucleotides are provided which are effective in inhibiting the growth, metastasis and/or angiogenesis of tumors, including particularly melanoma and/or lung cancer. Methods are also provided for use of these oligonucleotides in the treatment of diseases.

The present invention relates to humanized FcγRIIB antibodies, fragments, and variants thereof that bind human FcγRIIB with a greater affinity than said antibody binds FcγRIIA. The invention encompasses the use of the humanized antibodies of the invention for the treatment of any disease related to loss of balance of Fc receptor mediated signaling, such as cancer, autoimmune and inflammatory disease. The invention provides methods of enhancing the therapeutic effect of therapeutic antibodies by administering the humanized antibodies of the invention to enhance the effector function of the therapeutic antibodies. The invention also provides methods of enhancing the efficacy of a vaccine composition by administering the humanized antibodies of the invention. The invention encompasses methods for treating an autoimmune disease and methods for elimination of cancer cells that express FcγRIIB.

Disclosed is a method of directing a cellular immune response against an HIV-infected cell in a mammal involving administering to the mammal an effective amount of therapeutic cells which express a membrane-bound, proteinaceous chimeric receptor comprising (a) an extracellular portion which includes a fragment of CD4 which is capable of specifically recognizing and binding the HIV-infected cell but which does not mediate HIV infection and (b) an intracellular portion which is capable of signalling the therapeutic cell to destroy the receptor-bound HIV-infected cell. Also disclosed is a second method of treating HIV in a mammal involving administering to the mammal an effective amount of therapeutic cells expressing a membrane-bound, proteinaceous chimeric receptor comprising an extracellular portion which includes a fragment of CD4 which is capable of specifically recognizing and binding the HIV-infected cell but which does not mediate HIV infection. Also disclosed are cells which express the chimeric receptors and DNA and vectors encoding the chimeric receptors.

Disclosed is a method of directing a cellular response in a mammal by expressing in a cell of the mammal a chimeric receptor which causes the cells to specifically recognize and destroy an infective agent, a cell infected with an infective agent, a tumor or cancerous cell, or an autoimmune-generated cell. Also disclosed are cells which express the chimeric receptors and DNA encoding the chimeric receptors.

A crystalline composition comprising a crystal of the IL-6 receptor I chain is provided. Also provided are methods of using the crystal and related structural information to screen for and design compounds that interact with IL-6R, or variants thereof. Also provided arc methods of modulating an IL-6 receptor comprising contacting the IL-6 receptor with a compound identified by the screening method of the invention.

The present invention provides antibodies that bind to the IL-3 receptor alpha subunit alpha (Il3Rα) chain, and compositions comprising such antibodies. The present invention provides methods for inhibiting or reducing an IL3Rα-expressing cell population, the methods comprising contacting a population of IL3Rα-expressing cells (e.g., cancer cells and/or cancer stem cells) with an antibody that binds to IL3Rα. The present invention also provides antibody conjugates comprising an antibody that binds to an IL3Rα chain linked to a cytotoxic agent or anticellular agent and compositions comprising such conjugates. The present invention also provides methods for preventing, treating and/or managing a disorder associated with IL3Rα-expressing cells (e.g., a hematological cancer), the methods comprising administering to a subject in need thereof an antibody that binds to IL3Rα.

The invention concerns immunogens, immunogenic compositions and method for the treatment of gastrin-dependent tumors. The immunogens comprise a peptide from the CCK-B/gastrin-receptor conjugated to a spacer and to an immunogenic carrier. The immunogens are capable of inducing antibodies in vivo which bind to the CCK-B/gastrin-receptor in tumor cells, thereby preventing growth stimulating peptide hormones from binding to the receptors, and inhibiting tumor cell growth. The immunogens also comprise antibodies against the CCK-B/gastrin-receptor for passive immunization. The invention also concerns diagnostic methods for detecting gastrin-dependent tumors in vivo or from a tissue biopsy using the antibodies of the invention.

This invention provides a class of androgen receptor targeting agents (ARTA). The compounds are selective androgen receptor modulators (SARM) useful for, inter-alia, suppressing spermatogenesis, treating a subject having a hormone related condition, treating a subject suffering from prostate cancer, delaying the progression of prostate cancer, preventing the recurrence of prostate cancer, and treating the recurrence of prostate cancer.

In accordance with the present invention, it has been discovered that various members of the steroid/thyroid superfamily of receptors can interact with the insect-derived ultraspiracle receptor, to form multimeric species. Accordingly, the interaction of at least one member of the steroid/thyroid superfamily of receptors with at least the dimerization domain of the ultraspiracle receptor modulates the ability of said member of the steroid/thyroid superfamily of receptors to transactivate transcription of genes maintained under hormone expression control in the presence of the cognate ligand for said member of the superfamily.

In accordance with the present invention, it has been discovered that various members of the steroid/thyroid superfamily of receptors can interact to form multimeric species comprising a complex of more than one receptor. Accordingly, the interaction of a first receptor species with a second receptor species modulates the ability of the first receptor species to trans-activate transcription of genes maintained under hormone expression control in the presence of the cognate ligand for said first receptor.

The present invention relates to chimeric transmembrane immunoreceptors, named “zetakines,” comprised of an extracellular domain comprising a soluble receptor ligand linked to a support region capable of tethering the extracellular domain to a cell surface, a transmembrane region and an intracellular signalling domain. Zetakines, when expressed on the surface of T lymphocytes, direct T cell activity to those specific cells expressing a receptor for which the soluble receptor ligand is specific. Zetakine chimeric immunoreceptors represent a novel extension of antibody-based immunoreceptors for redirecting the antigen specificity of T cells, with application to treatment of a variety of cancers, particularly via the autocrin/paracrine cytokine systems utilized by human malignancy. In a preferred embodiment is a glioma-specific immunoreceptor comprising the extracellular targetting domain of the IL-13Rα2-specific IL-13 mutant IL-13(E13Y) linked to the Fc region of IgG, the transmembrane domain of human CD4, and the human CD3 zeta chain.

The present invention discloses a novel chimeric antigen receptor and applications thereof, wherein the novel chimeric antigen receptor comprises a signal peptide, an antigen binding domain, a transmembrane domain and an intracellular signal domain, and comprises a 4-1BB signal peptide and/or a 4-1BB molecular transmembrane domain. According to the present invention, a variety of chimeric antigenreceptor nucleic acid sequences are separated and purified, the chimeric antigen receptor specifically for CD19 malignant tumor antigens and the CAR-T cells are provided, and the blood cell line malignant tumor killing test results show that the tumor-cell-targeting ability of immune cells is significantly enhanced, and the tumor cell killing activity is enhanced.

A redirected Treg cell is endowed with specificity toward a selected target antigen or ligand. The cell contains a chimeric receptor polypeptide that is expressed in a single, continuous chain, with an extracellular recognition region displayed on the surface of the cell, a transmembrane region and an intracellular signaling region. The extracellular recognition region is specific for the selected target antigen or ligand. The intracellular signaling region includes a combination of T-cell signaling polypeptide moieties, which combination, upon binding of the extracellular recognition region to the selected target antigen or ligand, triggers activation of the redirected Treg cells to cause suppression of T-cell mediated immunity. Such redirected Treg cells may be used to suppress undesired activity of T effector cells thereby mediating an immune or inflammatory response. They are particularly useful in treating T effector cell-mediated diseases, such as inflammatory bowel disease, transplant rejection and GVH disease.

The present invention relates to small molecule potentiators of metabotropic receptors, in particular of the mGlu2 receptor. The present invention also relates to the use of these compounds for the prevention or treatment of neurological and psychiatric disorders associated with glutamate dysfunction and diseases in which metabotropic glutamate receptors are involved. The present invention thus provides compounds of formula I

wherein X¹ is N or C—R¹, X² is N or C—R², X³ is N or C—R³, X⁴ is N or C—R⁴ provided that none or one of X¹, X², X³ or X⁴ is N; Y¹ is N, C or C—R⁵, Y² is N, C or C—R⁶, Y³ is Y¹, Y², N, C or C—R⁷, Y⁴ is N, C or C—R⁸ provided that only the moiety Y¹, Y², Y³ or Y⁴ to which Z is bound is C and further provided at most one of Y¹, Y², Y³ or Y⁴ is N; Z is O, S, S(O), S(O)₂ or NR^Z; Q is CH₂ or CH₂CH₂, where one or two of the hydrogen atoms in CH₂ or CH₂CH₂ may be replaced by halogen, C₁-C₄-alkyl or C₁-C₄-haloalkyl; R¹ is inter alia hydrogen, halogen, C₁-C₆-alkyl, C₁-C₆-haloalkyl, C₁-C₆-alkoxy, C₁-C₄-haloalkoxy, C₃-C₈-cycloalkyl, a radical NR^1aR^1b, C-bound 3- to 7-membered, saturated heterocyclyl having 1 or 2 nitrogen atoms and 0 or 1 heteroatoms, selected from O and S, as ring members, aryl, aryl-CH₂, aryloxy, hetaryl, hetaryloxy or hetaryl-CH₂, wherein the heterocyclyl, aryl and hetaryl rings ring in the last six radicals themselves are unsubstituted or carry 1, 2, 3, 4 or 5 identical or different radicals R^1c; R² has one of the meanings given for R¹; R³ and R⁴ are, inter alia, selected from hydrogen, halogen, C₁-C₄-alkyl, C₁-C₄-haloalkyl, C₃-C₆-cycloalkyl, C₁-C₄-alkoxy, C₁-C₄-alkoxy-C₁-C₄-alkyl, phenyl, C₁-C₄-haloalkoxy, a radical (CH₂)_nNR′R″; R⁵, R⁶, R⁷, R⁸ are, independently of each other, selected from hydrogen, halogen, etc.; R^a is C₃-C₆-cycloalkyl, C₁-C₆-haloalkyl or C₁-C₆-alkyl, which is unsubstituted or carries one radical selected from C₁-C₄-alkoxy, C₁-C₄-haloalkoxy and a radical NR^a1R^a2; and the N-oxides and the pharmaceutically acceptable salts thereof.

The invention provides FGFR fusion proteins, methods of making them, and methods of using them to treat proliferative disorders, including cancers and disorders of angiogenesis. The FGFR fusion molecules can be made in CHO cells and may comprise deletion mutations in the extracellular domains of the FGFRs which improve their stability. These fusion proteins inhibit the growth and viability of cancer cells in vitro and in vivo. The combination of the relatively high affinity of these receptors for their ligand FGFs and the demonstrated ability of these decoy receptors to inhibit tumor growth is an indication of the clinical value of the compositions and methods provided herein.

A compound of general formula (1) wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12 are H or methyl, R13, R14, R15 and R16 are H or alkyl, wherein L1 and L2 are linkers selected from single bond, methyl, ethyl, wherein R19, R20 and R21 are H or —CH₂X, NT is selected from H, hydroxyl, alkyl, aminoacid, aminoacid analogue, polypeptide and functional group, CT is selected from hydrogen, hydroxyl, alkyl, aminoacid, aminoacid analogue, polypeptide and functional group shows high selectivity and high affinity for MC1-receptors in combination with effective stimulation or inhibiton of cAMP formation in MC1-receptor expressing cells but low affinity for other subtypes of MC-receptors and may be used to treat a wide range of inflammatory conditions. Also disclosed is a DNA molecule and a corresponding vector encoding the compound, a fusion protein comprising a copy of it, a vector comprising DNA encoding the fusion protein, and a pharmaceutical composition comprising the compound.

Human receptor selective atrial natriuretic factor variants containing various substitutions, especially G16R, show equal potency and binding affinity for the human A-receptor but have decreased affinity for the human clearance or C-receptor. These ANF variants have natriuretic, diuretic and vasorelaxant activity but have increased metabolic stability, making them suitable for treating congestive heart failure, acute kidney failure and renal hypertension.

The invention provides improved compositions for adoptive T cell therapies for B cell related conditions.

The invention provides an androgen receptor antagonist for resisting the prostate cancer, relates to a sulfoimidazoledione with substituted groups on two nitrogen atoms, and relates to a use of such the compounds as a medicament for treating the diseases or disorders related to the androgen receptor, such as prostate cancer, alopecia or whelk.

The present invention relates to novel Death Domain Containing Receptor-5 (DR5) proteins which are members of the tumor necrosis factor (TNF) receptor family, and have now been shown to bind TRAIL. In particular, isolated nucleic acid molecules are provided encoding the human DR5 proteins. DR5 polypeptides are also provided as are vectors, host cells and recombinant methods for producing the same. The invention further relates to screening methods for identifying antagonists and antagonists of DR5 activity. The invention also relates to the treatment of diseases associated with reduced or increased levels of apoptosis using antibodies specific for DR5, which may be agonists and/or antagonists of DR5 activity.

The present invention is directed to bispecific, heterodimeric immunomodulatory antibodies.

A method for the inhibition of the binding of .alpha..sub.4.beta..sub.1 integrin to its receptors, for example VCAM-1 (vascular cell adhesion molecule-1) and fibronectin; compounds that inhibit this binding; pharmaceutically active compositions comprising such compounds; and the use of such compounds either as above, or in formulations for the control or prevention of diseases states in which .alpha..sub.4.beta..sub.1 is involved.