Erschienen in:
01.04.2008 | Original Article
Introduction of functional chimeric E/L-selectin by RNA electroporation to target dendritic cells from blood to lymph nodes
verfasst von:
Jan Dörrie, Niels Schaft, Ina Müller, Verena Wellner, Tanja Schunder, Jens Hänig, Gertie J. Oostingh, Michael P. Schön, Caroline Robert, Eckhart Kämpgen, Gerold Schuler
Erschienen in:
Cancer Immunology, Immunotherapy
|
Ausgabe 4/2008
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Abstract
Background
Inefficient migration of dendritic cells (DC) to regional lymph nodes (LN) upon intracutaneous injection is a major obstacle for effective DC vaccination. Intravenous vaccination is unfavorable, because DC cannot migrate directly from the blood into LN.
Methods
To enable human monocyte-derived (mo)DC to enter LN directly from the blood, we manipulated them by RNA electroporation to express a human chimeric E/L-selectin (CD62E/CD62L) protein, which binds to peripheral node addressin expressed on high endothelial venules.
Results
Transfection efficiency exceeded 95%, and high E/L-selectin surface expression was detected for >48 h. E/L-selectin RNA-transfected DC displayed an identical mature DC phenotype as mock-transfected DC. Furthermore, E/L-selectin-transfected DC maintained their normal CCR7-mediated migration capacity, and their ability to prime and expand functional cytotoxic T cells recognizing MelanA. Most importantly, E/L-selectin-RNA-transfected DC gained the capability to attach to and roll on sialyl-LewisX in vitro.
Outlook
The presented strategy can be readily translated into the clinic, as it involves no stable genetic manipulation or viral transformation, and allows targeting of a large number of LN.