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Publication : Optogenetic control of chemokine receptor signal and T-cell migration.

First Author  Xu Y Year  2014
Journal  Proc Natl Acad Sci U S A Volume  111
Issue  17 Pages  6371-6
PubMed ID  24733886 Mgi Jnum  J:208842
Mgi Id  MGI:5565104 Doi  10.1073/pnas.1319296111
Citation  Xu Y, et al. (2014) Optogenetic control of chemokine receptor signal and T-cell migration. Proc Natl Acad Sci U S A 111(17):6371-6
abstractText  Adoptive cell transfer of ex vivo-generated immune-promoting or tolerogenic T cells to either enhance immunity or promote tolerance in patients has been used with some success. However, effective trafficking of the transferred cells to the target tissue sites is the main barrier to achieving successful clinical outcomes. Here we developed a strategy for optically controlling T-cell trafficking using a photoactivatable (PA) chemokine receptor. Photoactivatable-chemokine C-X-C motif receptor 4 (PA-CXCR4) transmitted intracellular CXCR4 signals in response to 505-nm light. Localized activation of PA-CXCR4 induced T-cell polarization and directional migration (phototaxis) both in vitro and in vivo. Directing light onto the melanoma was sufficient to recruit PA-CXCR4-expressing tumor-targeting cytotoxic T cells and improved the efficacy of adoptive T-cell transfer immunotherapy, with a significant reduction in tumor growth in mice. These findings suggest that the use of photoactivatable chemokine receptors allows remotely controlled leukocyte trafficking with outstanding spatial resolution in tissues and may be feasible in other cell transfer therapies.
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