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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Henner, D. Kotts, C. Carver, M. E. Shepard, H. M. Wong, W. L. Ridgway, J. B. Rowland, A. M. Carter, P. Presta, L. Gorman, C. M. |
| Description | Author Affiliation: Carter P ( Department of Protein Engineering, Genentech Inc., South San Francisco, CA 94080.); |
| Abstract | The murine monoclonal antibody mumAb4D5, directed against human epidermal growth factor receptor 2 (p185HER2), specifically inhibits proliferation of human tumor cells overexpressing p185HER2. However, the efficacy of mumAb4D5 in human cancer therapy is likely to be limited by a human anti-mouse antibody response and lack of effector functions. A 'humanized' antibody, humAb4D5-1, containing only the antigen binding loops from mumAb4D5 and human variable region framework residues plus IgG1 constant domains was constructed. Light- and heavy-chain variable regions were simultaneously humanized in one step by 'gene conversion mutagenesis' using 311-mer and 361-mer preassembled oligonucleotides, respectively. The humAb4D5-1 variant does not block the proliferation of human breast carcinoma SK-BR-3 cells, which overexpress p185HER2, despite tight antigen binding (Kd = 25 nM). One of seven additional humanized variants designed by molecular modeling (humAb4D5-8) binds the p185HER2 antigen 250-fold and 3-fold more tightly than humAb4D5-1 and mumAb4D5, respectively. In addition, humAb4D5-8 has potency comparable to the murine antibody in blocking SK-BR-3 cell proliferation. Furthermore, humAb4D5-8 is much more efficient in supporting antibody-dependent cellular cytotoxicity against SK-BR-3 cells than mumAb4D5, but it does not efficiently kill WI-38 cells, which express p185HER2 at lower levels. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 10 |
| Volume Number | 89 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1992-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antibodies, Monoclonal Genetics Immunotherapy Protein-Tyrosine Kinases Immunology Proto-Oncogene Proteins Proto-Oncogenes Receptor, Epidermal Growth Factor Adenocarcinoma Amino Acid Sequence Therapeutic Use Breast Neoplasms Cell Division Cell Line, Transformed Chimera Cloning, Molecular Enzyme-Linked Immunosorbent Assay Immunoglobulin Heavy Chains Immunoglobulin Light Chains Immunoglobulin Variable Region Models, Molecular Molecular Sequence Data Oligodeoxyribonucleotides Oligonucleotides, Antisense Polymerase Chain Reaction Protein Conformation Receptor, ErbB-2 Restriction Mapping Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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