Attempts were made to isolate a virus from systemic lupus erythematosus patients, using lymphocyte cultures prepared from peripheral blood. Both cocultivation with VERO cells and fusion experiments in which lysolecithin and Concanavalin A were employed as fusing agents failed to reveal any presence of virus. Con A proved to be useful for heterokaryon formation in primate cells, fusion levels varying from 14-21% as shown by autoradiography.
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