title: Glycosylation and biological activity of CAMPATH-1H expressed in different cell lines and grown under different culture conditions.
abstract: CAMPATH-1H (where CAMPATH is a trade mark of Wellcome group companies), a humanized IgG antibody used in the therapy of lymphoma, leukaemia and rheumatoid arthritis, has been expressed in Chinese hamster ovary, Y0 myeloma and NS0 myeloma cell lines. These engineered cell lines were grown under different culture conditions, and the antibody isolated and purified. N-Linked oligosaccharides, on the CH2 heavy chain region of the antibody, were isolated and analysed by hydrazinolysis, high-performance anion-exchange chromatography with pulsed amperometric detection, laser-desorption mass spectrometry and sequential exoglycosidase treatment. Both the glycosylation pattern and the biological activity of CAMPATH-1H, as measured by antibody-dependent cell-mediated cytotoxicity, were markedly affected by the cell line used to express the antibody. It is concluded that glycosylation of the antibody may be important in the clinical outcome of therapy.
authors.affiliation: Department of Cell Biology, Wellcome Research Laboratories, Beckenham, Cambridge, UK.
authors.forename: M R
authors.initials: MR
authors.lastname: Lifely
authors.forename: C
authors.initials: C
authors.lastname: Hale
authors.forename: S
authors.initials: S
authors.lastname: Boyce
authors.forename: M J
authors.initials: MJ
authors.lastname: Keen
authors.forename: J
authors.initials: J
authors.lastname: Phillips
mesh_terms: D000074323:Alemtuzumab; D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis / Q000737:chemistry* / Q000494:pharmacology; D061067:Antibodies, Monoclonal, Humanized; D000912:Antibodies, Neoplasm / Q000096:biosynthesis / Q000737:chemistry* / Q000494:pharmacology; D015703:Antigens, CD / Q000276:immunology*; D000951:Antigens, Neoplasm; D000970:Antineoplastic Agents / Q000737:chemistry* / Q000494:pharmacology; D000074301:CD52 Antigen; D002240:Carbohydrate Sequence; D002478:Cells, Cultured; D002851:Chromatography, High Pressure Liquid; D006224:Cricetinae; D004797:Enzyme-Linked Immunosorbent Assay; D006023:Glycoproteins / Q000096:biosynthesis / Q000737:chemistry* / Q000494:pharmacology; D006031:Glycosylation; D051379:Mice; D008969:Molecular Sequence Data; D009844:Oligosaccharides / Q000032:analysis / Q000592:standards; D051381:Rats; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000494:pharmacology; D017421:Sequence Analysis; D013045:Species Specificity; D013329:Structure-Activity Relationship
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D000912:Antibodies, Neoplasm; D015703:Antigens, CD; D000951:Antigens, Neoplasm; D000970:Antineoplastic Agents; D000074301:CD52 Antigen; C000613864:Cd52 protein, rat; D006023:Glycoproteins; D009844:Oligosaccharides; D011994:Recombinant Proteins; D000074323:Alemtuzumab