Morphological Study of Autologous Rosettes (A‐RFC)

Abstract
The morphology of A-RFC was studied by light and EM. A-RFC were obtained from the spleen of adult thymectomized (ATx) or nude mice, and from neonatal thymus grafts during the regeneration phase. Among the auto-rosettes seen by light microscopy, 76% of them were formed by lymphoid cells which included a high proportion of large lymphocytes (48%). EM study performed after isolation of A-RFC by micromanipulation demonstrated that 74% were formed by large lymphoid cells with an immature nucleus. The finding of such large-sized lymphoid cells with immature nuclei indicates that A-RFC might belong to an immature T [thymus-derived] cell class.