METHOD FOR PREPARING HUMAN C-1 ESTERASE INHIBITOR AMD PRODUCT FOR USING IN MEDICINE Russian patent published in 2005 - IPC

FIELD: biotechnology, medicine, pharmacy, veterinary science.

SUBSTANCE: method involves addition of DEAE-Sephadex A-50 to cryosupernatant from human blood plasma, incubation, filtration and addition of QAE-Sephadex to filtrate followed by incubation. Filtered off precipitate of QAE-Sephadex is subjected for successive step-by-step washing out with buffer solution at pH 5.5 and 7.5, elution at pH 7.7 and dialysis. Then PEG-6000 is added to dialyzed solution to the concentration 12%, solution is incubated and centrifuged. To the prepared supernatant glycine is added to the final concentration 100 mM and lysine is added to the final concentration 10 mM at pH 7.2, then Twin-80 is added and pH value is corrected to 6.8-7.2 followed by addition of tri-n-butyl phosphate to the final concentration 0.3%. Prepared suspension is stirred, subjected for chromatography on DEAE-Sepharose FF at pH 7.0, chromatography on Zn-chelating Sepharose FF at pH 7.5 and the end product with specific activity from 7.5 ± 0.5 U/mg of protein and above, and with the final concentration of lysine 10 mM, not less, and with the final concentration of glycine 100 mM, not less. Method provides safety of activity in antiviral treatment and preparing product containing the natural C-1 esterase inhibitor from blood plasma with high specific activity.

EFFECT: improved method for preparing.

6 cl, 2 dwg, 1 ex