Abstract
Two different hybridoma collections from adult C3H/HeJ thymus were generated in order to analyse T-cell receptor (TcR) rearrangements, surface expression of T-cell receptors and differentiation markers as well as lymphokine production. Large, low density thymocytes were either directly fused to the thymoma BW 5147 alpha-beta- variant, or fused after stimulation with Concanavalin A in the presence of interleukin-2 for 48 h. The hybrids obtained from Concanavalin A-stimulated cells represented rather mature thymocytes, with regard to TcR rearrangements and surface T-cell receptor expression. The collection of hybrids derived from freshly isolated large thymocytes contained cells in various stages of T-cell development. An unexpectedly large number of hybrids (46 out of 84) from this group expressed full-length C beta together with full-length, or shorter, C delta mRNA. This finding suggests that a considerable proportion of alpha beta T cells proceeds through a stage in development where delta genes are being rearranged and transcribed.
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