摘要:
The invention relates to bispecific and oligospecific, mono- and oligovalent receptors which are prepared by gene manipulation by fusion of DNA coding for F(ab) fragments of antibodies of two or more different specificities by means of suitable linkers. In this connection, one specificity is preferably directed either against an epitope, which is located on the cell membrane or in the interstitium, of a tumor-associated antigen (TAA) or against an epitope in the tumor endothelium (TE), while the other specificities relate to high-molecular or low-molecular weight ligands and react, for example, with the Komplexons ethylenediaminetetraacetate and diethylenetriaminepentaacetate in Y90 complexed form (EDTA-Y90 and DTPA-Y90 respectively). In a particularly preferred embodiment, the binding with the Komplexons takes place on the Komplexon receptor arm via fos-jun interaction (or else avidin-biotin interaction). Other preferred specificities have catalytic properties.
摘要:
Provided herein are carbohydrate complement-modified bifunctional glycoproteins, and their use in tumor-selective therapy. The bifunctional glycoproteins comprise a first component that specifically binds to a tumor-specific antigen and a second component having enzymatic activity by means of which a non-toxic prodrug is cleaved into a cytotoxic drug. The carbohydrate complement comprises at least one exposed carbohydrate residue selected from the group consisting of mannose, galactose, N-acetylglucosamine, N-acetyllactose, glucose and fucose. The modified carbohydrate complement contributes to increased relative concentration of the glycoproteins at the site of the tumor, and enhanced clearance from the general circulation and non-tumor sites.
摘要:
The goal of the invention is to increase the therapeutical activity of oncolytic NDV. This issue is solved by a Newcastle Disease Virus comprising a recombinant nucleic acid, wherein the nucleic acid codes for a binding protein that has a therapeutic activity when expressed by the virus-infected tumor cell. Binding proteins belong to the following group: A natural ligand or a genetically modified ligand, a recombinant soluble domain of a natural receptor or a modified version of it, a peptide-ligand, an antibody molecule and derivatives thereof or antibody-like molecules like ankyrin repeat molecules or derivatives thereof.
摘要:
The invention relates to compounds which contain an antigen binding region which is bound to at least one enzyme which is able to metabolize a compound (prodrug) which has little or no cytotoxicity to a cytotoxic compound (drug), where the antigen binding region is composed of a single polypeptide chain. It is advantageous for covalently bonded carbohydrates to be present on the polypeptide chain.
摘要:
The invention relates to murine monoclonal antibodies (MAbs), A, B, C and D, which are directed against tumor-associated antigens. The nearly complete nucleotide sequences of the V genes of these MAbs are described, so that the relevant variable domains can be put together to give chimeric MAbs, or “humanized” MAbs are obtained by inserting the hypervariable regions (complementarity determining regions=CDR) into a human MAb framework. Antibody constructs of this type can be employed in human therapy and in vivo diagnosis without the disadvantages observed with murine MAbs.
摘要:
Antigenic constructs which result from linkage of major histocompatibility complex (MHC) class I antigens with specific carrier molecules are described. The linkage is effected N- or C-terminally by covalent bonding or, for example, in the case of non-covalent bonding by an avidin/biotin bridge. The specific carrier molecules bind selectively to target cells and are preferably monoclonal antibodies. Processes of genetic manipulation for the preparation of such constructs are indicated. Antigenic constructs according to the invention are used to damage or eliminate target cells.
摘要:
The present invention relates to glycosyl-etoposide prodrugs, a process for the preparation thereof and the use thereof in combination with functionalized tumor-specific enzyme conjugates for treating cancers.
摘要:
The invention relates to monoclonal antibodies against a tumor-associated antigen which is mainly derived from tumors from the group of carcinomas of the breast, ovaries and prostate, as well as adenocarcinomas of the lung, which additionally react with polymorphic epithelial mucin (PEM), to the preparation and use thereof and to the use of the epitope defined by the antibody for diagnosis and therapy.
摘要:
The invention relates to bispecific tetravalent receptors of the formula I ##STR1## or formula II ##STR2## against a tumor-associated antigen and against an agent active against tumors.