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Amon R, Rosenfeld R, Perlmutter S, Grant OC, Yehuda S, Borenstein-Katz A, Alcalay R, Marshanski T, Yu H, Diskin R, Woods RJ, Chen X, Padler-Karavani V. Directed Evolution of Therapeutic Antibodies Targeting Glycosylation in Cancer. Cancers (Basel) 2020; 12:cancers12102824. [PMID: 33007970 PMCID: PMC7601599 DOI: 10.3390/cancers12102824] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 09/28/2020] [Accepted: 09/28/2020] [Indexed: 01/07/2023] Open
Abstract
Simple Summary We generated a platform for designing optimized functional therapeutic antibodies against cancer glycans. The target tumor-associated carbohydrate antigen is commonly expressed in colon and pancreatic cancers. We developed a system for selection of potent antibodies by yeast surface display against this carbohydrate antigen, then showed that elite clones have potent affinity, specificity, cancer cell binding, and therapeutic efficacy. These tools have broad utility for manipulating and engineering antibodies against carbohydrate antigens, and provide major innovative avenues of research in the field of cancer therapy and diagnostics. Abstract Glycosylation patterns commonly change in cancer, resulting in expression of tumor-associated carbohydrate antigens (TACA). While promising, currently available anti-glycan antibodies are not useful for clinical cancer therapy. Here, we show that potent anti-glycan antibodies can be engineered to acquire cancer therapeutic efficacy. We designed yeast surface display to generate and select for therapeutic antibodies against the TACA SLea (CA19−9) in colon and pancreatic cancers. Elite clones showed increased affinity, better specificity, improved binding of human pancreatic and colon cancer cell lines, and increased complement-dependent therapeutic efficacy. Molecular modeling explained the structural basis for improved antibody functionality at the molecular level. These new tools of directed molecular evolution and selection for effective anti-glycan antibodies, provide insights into the mechanisms of cancer therapy targeting glycosylation, and provide major methodological advances that are likely to open up innovative avenues of research in the field of cancer theranostics.
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Affiliation(s)
- Ron Amon
- Department of Cell Research and Immunology, The George S. Wise Faculty of Life Sciences, The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 69978, Israel; (R.A.); (S.P.); (S.Y.); (T.M.)
| | - Ronit Rosenfeld
- Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness-Ziona 76100, Israel; (R.R.); (R.A.)
| | - Shahar Perlmutter
- Department of Cell Research and Immunology, The George S. Wise Faculty of Life Sciences, The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 69978, Israel; (R.A.); (S.P.); (S.Y.); (T.M.)
- The Azrieli Faculty of Medicine, Bar Ilan University, Safed 1311502, Israel
| | - Oliver C. Grant
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30606, USA; (O.C.G.); (R.J.W.)
| | - Sharon Yehuda
- Department of Cell Research and Immunology, The George S. Wise Faculty of Life Sciences, The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 69978, Israel; (R.A.); (S.P.); (S.Y.); (T.M.)
| | - Aliza Borenstein-Katz
- Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel; (A.B.-K.); (R.D.)
| | - Ron Alcalay
- Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness-Ziona 76100, Israel; (R.R.); (R.A.)
| | - Tal Marshanski
- Department of Cell Research and Immunology, The George S. Wise Faculty of Life Sciences, The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 69978, Israel; (R.A.); (S.P.); (S.Y.); (T.M.)
| | - Hai Yu
- Department of Chemistry, University of California, Davis, CA 95616, USA; (H.Y.); (X.C.)
| | - Ron Diskin
- Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel; (A.B.-K.); (R.D.)
| | - Robert J. Woods
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30606, USA; (O.C.G.); (R.J.W.)
| | - Xi Chen
- Department of Chemistry, University of California, Davis, CA 95616, USA; (H.Y.); (X.C.)
| | - Vered Padler-Karavani
- Department of Cell Research and Immunology, The George S. Wise Faculty of Life Sciences, The Shmunis School of Biomedicine and Cancer Research, Tel Aviv University, Tel Aviv 69978, Israel; (R.A.); (S.P.); (S.Y.); (T.M.)
- Correspondence: ; Tel.: +972-3-640-6737
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