title: Dry-heat treatment process for enhancing viral safety of an antihemophilic factor VIII concentrate prepared from human plasma.
abstract: Viral safety is a prerequisite for manufacturing clinical antihemophilic factor VIII concentrates from human plasma. With particular regard to the hepatitis A virus (HAV), a terminal dry-heat treatment (100 degrees for 30 min) process, following lyophilization, was developed to improve the virus safety of a solvent/detergent-treated antihemophilic factor VIII concentrate. The loss of factor VIII activity during dry-heat treatment was of about 5%. No substantial changes were observed in the physical and biochemical characteristics of the dry-heat-treated factor VIII compared with those of the factor VIII before dry-heat treatment. The dry-heat-treated factor VIII was stable for up to 24 months at 4oC. The dry-heat treatment after lyophilization was an effective process for inactivating viruses. The HAV, murine encephalomyocarditis virus (EMCV), and human immunodeficiency virus (HIV) were completely inactivated to below detectable levels within 10 min of the dry-heat treatment. Bovine herpes virus (BHV) and bovine viral diarrhea virus (BVDV) were potentially sensitive to the treatment. However porcine parvovirus (PPV) was slightly resistant to the treatment. The log reduction factors achieved during lyophilization and dry-heat treatment were > or =5.55 for HAV, > or =5.87 for EMCV, > or =5.15 for HIV, 6.13 for BHV, 4.46 for BVDV, and 1.90 for PPV. These results indicate that dry-heat treatment improves the virus safety of factor VIII concentrates, without destroying the activity. Moreover, the treatment represents an effective measure for the inactivation of non-lipid-enveloped viruses, in particular HAV, which is resistant to solvent/detergent treatment.
authors.affiliation: Department of Biological Sciences, College of Life Science and Nanotechnology, Hannam University, Daejon 305-811, Korea. inskim@hnu.kr
authors.forename: In Seop
authors.initials: IS
authors.lastname: Kim
authors.forename: Yong Woon
authors.initials: YW
authors.lastname: Choi
authors.forename: Yong
authors.initials: Y
authors.lastname: Kang
authors.forename: Hark Mo
authors.initials: HM
authors.lastname: Sung
authors.forename: Jeong Sup
authors.initials: JS
authors.lastname: Shin
mesh_terms: D000818:Animals; D002417:Cattle; D002460:Cell Line; D002522:Chlorocebus aethiops; D004340:Drug Contamination / Q000517:prevention & control*; D004345:Drug Industry / Q000379:methods / Q000592:standards; D004355:Drug Stability; D005169:Factor VIII / Q000302:isolation & purification* / Q000494:pharmacology; D005612:Freeze Drying; D006358:Hot Temperature; D006801:Humans; D010949:Plasma / Q000378:metabolism*; D013552:Swine; D014709:Vero Cells; D014776:Virus Cultivation; D038301:Virus Inactivation; D014780:Viruses / Q000187:drug effects* / Q000254:growth & development
chemical_list: D005169:Factor VIII