title: Gelatin-immobilised poly(hydroxyethyl methacrylate) cryogel for affinity purification of fibronectin.
abstract: In this work, fibronectin purification from human plasma with the gelatin-immobilised poly(hydroxyethyl methacrylate) (PHEMA) cryogel has been evaluated. The PHEMA cryogel was prepared by cryo-polymerisation which proceeds in an aqueous solution of monomer frozen inside a plastic syringe. The PHEMA cryogel contained interconnected macrochannels of 10-200 μm in diameter. Gelatin molecules were covalently immobilised onto the PHEMA cryogel via carbodiimide activation. The gelatin-immobilised PHEMA cryogel was used to purify fibronectin from human plasma. Fibronectin adsorption from human plasma on the PHEMA cryogel was 0.30 mg/ml, while much higher adsorption values, up to 38 mg/ml, was obtained with the gelatin-immobilised PHEMA cryogel. The fibronectin adsorption capacity of the gelatin-immobilised PHEMA cryogel did not change with an increase in the flow rate of plasma. Up to 92 % of the adsorbed fibronectin was eluted using 2 M urea containing 1 M NaCl as elution agent. The adsorption-elution cycle was repeated ten times using the same PHEMA cryogel. No remarkable decrease was detected in the adsorption capacity of the gelatin-immobilised PHEMA cryogel.
authors.affiliation: Department of Biology, Molecular Biology Division, Hacettepe University, Beytepe, 06800 Ankara, Turkey.
authors.forename: Işık
authors.initials: I
authors.lastname: Perçin
authors.forename: Erol
authors.initials: E
authors.lastname: Aksöz
authors.forename: Adil
authors.initials: A
authors.lastname: Denizli
mesh_terms: D000327:Adsorption; D005591:Chemical Fractionation / Q000379:methods*; D059985:Cryogels / Q000737:chemistry*; D005353:Fibronectins / Q000097:blood / Q000737:chemistry / Q000302:isolation & purification*; D005780:Gelatin / Q000737:chemistry*; D006801:Humans; D011102:Polyhydroxyethyl Methacrylate / Q000737:chemistry*
chemical_list: D059985:Cryogels; D005353:Fibronectins; D011102:Polyhydroxyethyl Methacrylate; D005780:Gelatin