Abstract

Green fluorescent protein is widely used in biological studies including parabiosis models for visualization of cellular structures and cells. However, the growing number of the data is available regarding immunogenicity of this protein, which can interfere with its use in in vivo experiments. In this study, we attempted to induce neonatal immunological tolerance to GFP-labeled karyocytes by intraperitoneal injections of B6.GFP mouse splenocytes to newborn C57/B6 mice. GFP+ skin graft integrity was evaluated under UV light at 6weeks after skin grafting. GFP+ skin transplants survived up to 6weeks after grafting in all animals that undergone neonatal tolerance induction, whereas all skin grafts were rejected in control naïve mice within first two weeks. Thus, current protocol is suitable for induction of immune tolerance against GFP-labeled karyocytes.

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