Purification of human IgG by negative chromatography on omega-aminohexyl-agarose.
J Chromatogr B Analyt Technol Biomed Life Sci
; 878(5-6): 557-66, 2010 Feb 15.
Article
em En
| MEDLINE
| ID: mdl-20079697
The omega-aminohexyl diamine immobilized as ligand on CNBr- and bisoxirane-activated agarose gel was evaluated for the purification of human immunoglobulin G (IgG) from serum and plasma by negative affinity chromatography. The effects of matrix activation, buffer system, and feedstream on recovery and purity of IgG were studied. A one-step purification process using Hepes buffer at pH 6.8 allowed a similar recovery (69-76%) of the loaded IgG in the nonretained fractions for both matrices, but the purity was higher for epoxy-activated gel (electrophoretically homogeneous protein with a 6.5-fold purification). The IgG and human serum albumin (HSA) adsorption equilibrium studies showed that the adsorption isotherms of IgG and HSA obeyed the Langmuir-Freundlich and Langmuir models, respectively. The binding capacity of HSA was high (210.4 mg mL(-1) of gel) and a positive cooperativity was observed for IgG binding. These results indicate that immobilizing omega-aminohexyl using bisoxirane as coupling agent is a useful strategy for rapid purification of IgG from human serum and plasma.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sefarose
/
Imunoglobulina G
/
Cromatografia de Afinidade
Limite:
Humans
Idioma:
En
Revista:
J Chromatogr B Analyt Technol Biomed Life Sci
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Holanda