Letter to the Editor

Abstract

(Kauppila et al., 1982) and thyroid hormone (Orava et al., 1983) (Fentiman et al., 1985). To extend these studies, we have investigated the effects of IFN-LU on serum testosterone levels in normal healthy men who, during the experimental period, carried out their normal activities.Two volunteers received one subcutaneous injection of 3 X 106 IU of partially purijied human IFN-a (P-IFA) (Cantell and Hirvonen, 1977) with a specijic activity of 0.9 X lo6 I U h g protein, followed by 1.5 X 106 IU on