FIELD: medicine, pharmaceutics.
SUBSTANCE: present invention refers to immunology. There are presented versions of a CD20 modified antibody or its antigen-binding fragment. Each version is characterised by the fact that it comprises a variable region of a light chain and a variable region of a heavy chain and induces a higher level of apoptosis as compared with B-Lyl murine antibody. There are presented versions of the compositions to enhance the effector functions. One of such compositions contains antibodies wherein at least 20% of the Fc oligosaccharides are bisectional and non-fucosylated, whereas the other one contains antibodies wherein at least 50% of the oligosaccharides are non-fucosylated. Also, there are described: versions of a host cell to produce the antibodies, an expression vector, as well as the versions of the coding polynucleotides, a method for producing the antibodies in a cell and using the antibodies for preparing a drug for treating disorders treated by B-cells depletion.
EFFECT: use of the inventions provides the antibodies with the improved therapeutic properties, including with higher Fc receptor binding and enhanced effector function that can be find application in treating tumors.
36 cl, 3 ex, 9 tbl, 26 dwg
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