Development and continuous growth in culture of interleukin 2-producer lymphocytes from athymic nu/nu mice

European Journal of Immunology
R PalaciosP Sideras

Abstract

Splenocytes of nu/nu mice treated with serum thymic factor (FTS) for 3 or more days followed by stimulation with either phorbol myristate acetate (PMA) or concanavalin A (Con A) produced interleukin 2 (IL 2) as determined in two indicator systems, namely, support of growth of IL 2-dependent T cells and promotion of Con A-initiated mitogenesis of thymocytes. However, neither mitogens nor FTS alone could induce nude mice cells to product IL 2. Supernatants derived from the tumor cell line WEHI-3 (WEHI-3 conditioned media) induced and supported continuous growth in culture of Thy-1.2+, Lyt-1+2- lymphocytes from athymic nude mice capable of producing IL 2 after their stimulation by either PMA or Con A. The growth of these IL 2-producer cell lines strickly depends on the presence of WEHI-3 conditioned media, as in the absence of it they die 24-48 h later. In addition, WEHI-3 conditioned media have been supporting the growth of IL 2-producer cell lines derived from nude mice for 3 1/2 months. The helper factor contained in WEHI-3 conditioned media responsible for the above biological activity has an apparent mol. wt. of approximately 40 000 as determined by Sephadex G-100 chromatography and lacks IL 1 and IL 2 activities, but efficie...Continue Reading

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Sep 1, 1988·Immunopharmacology·N M KouttabA L Maizel
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Jan 1, 1986·European Journal of Immunology·R Palacios, H Von Boehmer

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