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  • Title: High versus ultra-high purity factor VIII concentrate therapy: prospective evaluation of immunological and clinical parameters in HIV seronegative and seropositive hemophiliacs.
    Author: Varon D, Schulman S, Dardik R, Barzilai A, Bashari D, Martinowitz U.
    Journal: Thromb Haemost; 1994 Sep; 72(3):359-62. PubMed ID: 7855784.
    Abstract:
    This study aimed at evaluation of the immunological status and the clinical course of both HIV seronegative and seropositive hemophiliacs treated with either an ultra-pure factor VIII product (UP-F VIII), or a high-purity F VIII (HP-F VIII) concentrate. Eighteen HIV seronegative patients were divided into two groups of therapy and their immune status was followed for 2 years. During the second year of the study 8 patients of the HP-F VIII and 6 from the UP-F VIII therapy groups were switched to the alternative F VIII concentrates. Eighteen asymptomatic HIV seropositive patients were also divided into therapy groups and their immune status and any development of HIV-related symptoms were followed for 4 years. Evaluation of the HIV seronegative patients during the first year did not reveal any differences between the groups in the CD4 or CD8 cell counts, in natural killer cell (NK) activity, or in the mitogenic responses of T lymphocytes to Phytohemagglutinin (PHA), and of B lymphocytes to Pokeweed mitogen (PWM). The switch of 8 patients from the HP-F VIII and 6 from the UP-F VIII groups to the alternative concentrate did not yield any changes in their immune profile during the second year of the study. The HIV seropositive groups differed in the initial CD4 count, with a lower CD4 count (193 +/- 126 vs 437 +/- 142) and a higher F VIII consumption (63,000 +/- 17,000 vs 26,000 +/- 10,000) in the UP-F VIII group.(ABSTRACT TRUNCATED AT 250 WORDS)
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