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-Irradiation


* Microbiological Research Group of the Hungarian Academy of Sciences Budapest, Hungary
Institute of Medico-Biological Problems Moscow, USSR
Institute of Morphology of Man Moscow, USSR
There is evidence that the spleen is one of the main sites of interferon synthesis (Heineberg, Gold & Robbins, 1964; Kono & Ho, 1965; Fruitstone et al. 1966). Other studies have shown that the role of the spleen is more important in the production of interferon in response to intravenously administered endotoxin than in the synthesis of virus-induced interferon (De Somer & Billiau, 1966; Borecky & Lackovic, 1967; Ito et al. 1971). Effects of X-irradiation and antilymphocyte serum on the levels of circulating interferon prompted the conclusion that peripheral blood lymphocytes take part in myxovirus-induced interferon production (De Maeyer, De Maeyer-Guignard & Jullien, 1969; De Maeyer-Guignard & De Maeyer, 1971).
We have shown previously that although acute or fractional X- or
-irradiation or acute proton irradiation causes a reduction in spleen weight, the synthesis of circulating interferon does not change, and sometimes even increases, when poly I:C or endotoxin was used as inducer (Tálas et al. 1971, 1972a, b).
Present address: Department of Virology and Epidemiology, Baylor College of Medicine, Texas Medical Center, Houston, Texas 77025, U.S.A.
Received 21 August 1972;
accepted 30 November 1972.
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