title: Process-scale purification of immunoglobulin M concentrate.
abstract: An IgM concentrate was purified from Cohn fraction III. Efficiency of euglobin precipitation was shown to be controlled by pH and ionic strength. Prekallikrein activator activity in the product was insignificant. Overall yield from the octanoic acid supernate and purity of the concentrate were 66 +/- 8 (n = 16) and 50 +/- 5% (n = 16), respectively. Solvent-detergent treatment to inactivate lipid-enveloped viruses was demonstrated and implemented into the process. Process studies to control residual virucidal agents and C4a generating activity are presented.
authors.affiliation: Pharmaceutical Division, Miles Inc., Berkeley, Calif 94701-1986.
authors.forename: P K
authors.initials: PK
authors.lastname: Ng
authors.forename: P E
authors.initials: PE
authors.lastname: O'Rourke
authors.forename: J D
authors.initials: JD
authors.lastname: Andersen
authors.forename: G C
authors.initials: GC
authors.lastname: Tsay
authors.forename: M B
authors.initials: MB
authors.lastname: Dobkin
mesh_terms: D005591:Chemical Fractionation; D011232:Chemical Precipitation; D015934:Complement C4a / Q000096:biosynthesis / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007075:Immunoglobulin M / Q000302:isolation & purification*; D007221:Industry; D009994:Osmolar Concentration; D010865:Pilot Projects; D011288:Prekallikrein / Q000378:metabolism; D012712:Serum Globulins / Q000302:isolation & purification; D014721:Vesicular stomatitis Indiana virus / Q000472:pathogenicity
chemical_list: D007075:Immunoglobulin M; D012712:Serum Globulins; D015934:Complement C4a; D011288:Prekallikrein