title: Chromatographic methods for large-scale preparation of immunoglobulin G2a monoclonal antibodies Lym-1 and TNT-1 F(ab')2 fragments.
abstract: Lym-1 and TNT-1 are two murine immunoglobulin G2a monoclonal antibodies (MAbs) which have been used for clinical trials in cancer patients. This paper describes methods for large-scale preparation of F(ab')2 fragments from 50 mg to 4 g of MAbs Lym-1 and TNT-1. Digestion of MAbs with pepsin was optimized and performed at pH 3.8, a pepsin/antibody ratio of 1:250, and 3-4 h of incubation at 37 degrees C. The F(ab')2 fragments were purified by tandem column procedures using fast protein liquid chromatography. Quality control analyses of the products included protein purity, isoelectric point, immunoreactivity, and endotoxin level. The results revealed that the chromatographic procedures are practical, simple, and effective, and can be used to produce gram quantities of clinical-grade F(ab')2 fragments for the diagnosis of cancer in patients.
authors.affiliation: Department of Pathology, University of Southern California School of Medicine, Los Angeles 90033.
authors.forename: F M
authors.initials: FM
authors.lastname: Chen
authors.forename: C Z
authors.initials: CZ
authors.lastname: Liu
authors.forename: S A
authors.initials: SA
authors.lastname: Gaffar
authors.forename: A L
authors.initials: AL
authors.lastname: Epstein
mesh_terms: D000911:Antibodies, Monoclonal / Q000032:analysis* / Q000276:immunology; D002853:Chromatography, Liquid / Q000379:methods*; D004591:Electrophoresis, Polyacrylamide Gel; D007128:Immunoglobulin Fragments / Q000032:analysis* / Q000276:immunology; D007074:Immunoglobulin G / Q000276:immunology*; D010434:Pepsin A
chemical_list: D000911:Antibodies, Monoclonal; D007128:Immunoglobulin Fragments; D007074:Immunoglobulin G; D010434:Pepsin A