FIELD: medicine.
SUBSTANCE: invention refers to biotechnology, more specifically to biospecific antibodies, and can be used in medicine. Constructed is an antibody containing one of the following groups of six hypervariable region (HVR) sequences: (a) HVR-L1 containing the sequence NIAKTISGY; (b) HVR-L2, containing the sequence WGSFLY; (c) HVR-L3 containing the sequence HYSSPP; (d) HVR-H1 containing the sequence NIKDTY; (e) HVR-H2 containing the sequence RIYPTNGYTR; and (f) HVR-H3 containing the sequence WGGDGFYAMD; or (a) HVR-L1 containing the sequence NIAKTISGY; (b) HVR-L2 containing the sequence WGSFLY; (c) HVR-L3 containing the sequence HYSSPP; (d) HVR-H1 containing the sequence NISGTY; (e) HVR-H2 containing the sequence RIYPSEGYTR; and (f) HVR-H3 containing the sequence WVGVGFYAMD. The produced antibody specifically binds human epidermal growth factor receptor 2 (HER2) and vascular endothelial growth factor (VEGF) The invention also refers to a recovered Fab fragment of the above antibody, a polynucleotide coding it, to an expression vector, a host cell, a method for producing it, as well as to using it for treating HER2-mediated diseases.
EFFECT: present invention enables producing the bispecific high-affinity antibody able to bind VEGF and HER2 simultaneously.
14 cl, 65 dwg, 16 tbl, 8 ex
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