25-08-2022 дата публикации
Номер: US20220267415A1
Принадлежит:
This disclosure provides multimeric binding molecules that bind to SARS-CoV-2. This disclosure also provides compositions comprising the multimeric binding molecules, polynucleotides that encode the multimeric binding molecules, and host cells that can produce the binding molecules. Further this disclosure provides methods of using the multimeric binding molecules, including methods for treating and preventing coronavirus disease 2019 (COVID-19). 1. A multimeric binding molecule comprising two to six bivalent binding units , wherein each binding unit comprises two IgM or IgA heavy chain constant regions or multimerizing fragments or variants thereof each associated with a binding domain ,wherein three to twelve of the binding domains are identical immunoglobulin antigen binding domains that specifically bind to the SARS-CoV-2 spike (S) protein receptor binding domain (RBD);wherein each identical immunoglobulin antigen binding domain comprises a heavy chain variable region (VH) and a light chain variable region (VL) comprising six immunoglobulin complementarity determining regions HCDR1, HCDR2, HCDR3, LCDR1, LCDR2, and LCDR3, wherein the HCDR1, HCDR2, HCDR3, LCDR1, LCDR2, and LCDR3, comprise, respectively, the amino acid sequencesSEQ ID NOs: 39, 40, 41, 43, 44, and 45;SEQ ID NOs: 15, 16, 17, 19, 20, and 21;SEQ ID NOs: 23, 24, 25, 27, 28, and 29;SEQ ID NOs: 31, 32, 33, 35, 36, and 37;SEQ ID NOs: 47, 48, 49, 51, 52, and 53; orSEQ ID NOs: 55, 56, 57, 59, 60, and 61;wherein the CDR regions are defined according to Kabat; and wherein the multimeric binding molecule has greater antiviral potency against SARS-CoV-2 than a bivalent reference IgG antibody comprising two of the binding domains that specifically bind to the SARS-CoV-2 S protein RBD.2. The multimeric binding molecule of claim 1 , wherein the HCDR1 claim 1 , HCDR2 claim 1 , HCDR3 claim 1 , LCDR1 claim 1 , LCDR2 claim 1 , and LCDR3 claim 1 , comprise claim 1 , respectively claim 1 , the amino acid sequences SEQ ID ...
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