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Yields from Sendai Virus-induced Human Leukocyte Cultures Are Enhanced by Lowering the Incubation Temperature
Institut für Technische Chemie der Universität Hannover, Callinstrasse 3, D-3000 Hannover 1, Federal Republic of Germany
and1 DRK-Blutspendedienst Niedersachsen, Eldagsener Strasse 38, D-3257 Springe 1, Federal Republic of Germany
Increased yields of Sendai virus-induced human leukocyte interferon (IFN-
) were obtained by lowering the incubation temperature from the initial 37°C within 1 to 6 h after the addition of virus. Maximal stimulation was found when this was done 2 to 4 h after induction and when the lowered temperature was between 29 and 32°C. Compared to cultures kept at 37°C throughout, the resulting IFN-
yields were enhanced by 2.5- to 3-fold. This was mainly due to prolonged synthesis of IFN-
, which could be observed up to 20 h after induction, whereas in cultures kept at 37°C the production of IFN-
had practically ceased approx. 10 h after the addition of virus.
Keywords: IFN, leukocyte culture, temperature, yields
Received 26 August 1983;
accepted 21 November 1983.
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