In Vivo High Resolution Three-Dimensional Imaging of Antigen-Specific Cytotoxic T-Lymphocyte Trafficking to Tumors Export

@article{citeulike:2354399, abstract = {Magnetic resonance imaging (MRI) allows noninvasive and three-dimensional visualization of whole organisms over time, and, therefore, would be ideally suited to monitor cell trafficking in vivo. Until now, systemically injected cells had been difficult to visualize by MRI because of relatively inefficient labeling methods. We developed a novel, biocompatible, and physiologically inert nanoparticle (highly derivatized cross-linked iron oxide nanoparticle; CLIO-HD) for highly efficient intracellular labeling of a variety of cell types that now allows in vivo MRI tracking of systemically injected cells at near single-cell resolution. CD8+ cytotoxic T lymphocytes labeled with CLIO-HD were detectable via MRI with a detection threshold of 2 cells/voxel in vitro and [\~{}]3 cells/voxel in vivo in live mice. Using B16-OVA melanoma and CLIO-HD-labeled OVA-specific CD8+ T cells, we have demonstrated for the first time high resolution imaging of T-cell recruitment to intact tumors in vivo. We have revealed the extensive three-dimensional spatial heterogeneity of T-cell recruitment to target tumors and demonstrated a temporal regulation of T-cell recruitment within the tumor. Significantly, our data indicate that serial administrations of CD8+ T cells appear to home to different intratumoral locations, and may, therefore, provide a more effective treatment regimen than a single bolus administration. Together, these results demonstrate that CLIO-HD is uniquely suited for quantitative repetitive MRI of adoptively transferred cells and that this approach may be particularly useful for evaluating novel cell-based therapies in vivo.}, author = {Kircher, Moritz F. and Allport, Jennifer R. and Graves, Edward E. and Love, Victoria and Josephson, Lee and Lichtman, Andrew H. and Weissleder, Ralph}, citeulike-article-id = {2354399}, citeulike-linkout-0 = {http://cancerres.aacrjournals.org/cgi/content/abstract/63/20/6838}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/14583481}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=14583481}, day = {15}, journal = {Cancer Res}, keywords = {111in-oxine, 51cr, adoptive-transfer, biodistribution, ccne-grant, highly-derivatized-crosslinked-iron-oxide-nanoparticle, mit-mgh-ccne, mri, murine-model, ot-i-cd8-t-cells, tumor}, month = {October}, number = {20}, pages = {6838--6846}, posted-at = {2008-02-08 21:44:04}, priority = {0}, title = {In Vivo High Resolution Three-Dimensional Imaging of Antigen-Specific Cytotoxic T-Lymphocyte Trafficking to Tumors}, url = {http://cancerres.aacrjournals.org/cgi/content/abstract/63/20/6838}, volume = {63}, year = {2003} }

TY - JOUR ID - citeulike:2354399 L3 - citeulike-article-id:2354399 N2 - Magnetic resonance imaging (MRI) allows noninvasive and three-dimensional visualization of whole organisms over time, and, therefore, would be ideally suited to monitor cell trafficking in vivo. Until now, systemically injected cells had been difficult to visualize by MRI because of relatively inefficient labeling methods. We developed a novel, biocompatible, and physiologically inert nanoparticle (highly derivatized cross-linked iron oxide nanoparticle; CLIO-HD) for highly efficient intracellular labeling of a variety of cell types that now allows in vivo MRI tracking of systemically injected cells at near single-cell resolution. CD8+ cytotoxic T lymphocytes labeled with CLIO-HD were detectable via MRI with a detection threshold of 2 cells/voxel in vitro and [~]3 cells/voxel in vivo in live mice. Using B16-OVA melanoma and CLIO-HD-labeled OVA-specific CD8+ T cells, we have demonstrated for the first time high resolution imaging of T-cell recruitment to intact tumors in vivo. We have revealed the extensive three-dimensional spatial heterogeneity of T-cell recruitment to target tumors and demonstrated a temporal regulation of T-cell recruitment within the tumor. Significantly, our data indicate that serial administrations of CD8+ T cells appear to home to different intratumoral locations, and may, therefore, provide a more effective treatment regimen than a single bolus administration. Together, these results demonstrate that CLIO-HD is uniquely suited for quantitative repetitive MRI of adoptively transferred cells and that this approach may be particularly useful for evaluating novel cell-based therapies in vivo. IS - 20 JF - Cancer Res EP - 6846 TI - In Vivo High Resolution Three-Dimensional Imaging of Antigen-Specific Cytotoxic T-Lymphocyte Trafficking to Tumors VL - 63 SP - 6838 KW - 111in-oxine KW - 51cr KW - adoptive-transfer KW - biodistribution KW - ccne-grant KW - highly-derivatized-crosslinked-iron-oxide-nanoparticle KW - mit-mgh-ccne KW - mri KW - murine-model KW - ot-i-cd8-t-cells KW - tumor AU - Kircher, Moritz AU - Allport, Jennifer AU - Graves, Edward AU - Love, Victoria AU - Josephson, Lee AU - Lichtman, Andrew AU - Weissleder, Ralph PY - 2003/10/15/ UR - http://cancerres.aacrjournals.org/cgi/content/abstract/63/20/6838 ER -