Dynamics of microglia-glioblastoma crosstalk at the far infiltration zone
Nebeling, F. C.; Fuhrmann, F.; Mittag, M.; Musacchio, F.; Gockel, N. E.; Friker, L. L.; Leonardelli, S.; Filser, S.; Deli, A.; Stork, M.; Bano, D.; Pietsch, T.; Parrinello, S.; Hoelzel, M.; Herrlinger, U.; Salomoni, P.; Fuhrmann, M.
Show abstract
The interaction of glioblastoma (GB) and microglia is critical due to its implications for tumor progression, immune response modulation, and potential therapeutic strategies. However, the role of microglia in GB pathogenesis remains unclear, especially regarding the in vivo dynamics of their interplay. Performing three-photon imaging in an autochthonous, immunocompetent mouse GB model, we examined tumor/microglia dynamics within previously inaccessible regions at the GB far infiltration zone in the corpus callosum. Initially, microglia increased tissue surveillance upon encountering GB-cells in sparsely infiltrated areas. In contrast, when GB-cell density increased, microglia reduced surveillance, suggesting a biphasic response to tumor invasion. Additionally, microglia were not uniformly attracted to infiltrating GB-cells; only a subset moved directionally toward them within a defined spatial range. This study provides insight into the heterogeneity of the immune response to tumor invasion and the dynamics of microglia-GB interactions in vivo. Graphical abstract O_FIG O_LINKSMALLFIG WIDTH=200 HEIGHT=124 SRC="FIGDIR/small/614016v1_ufig1.gif" ALT="Figure 1"> View larger version (57K): org.highwire.dtl.DTLVardef@24b1d8org.highwire.dtl.DTLVardef@1180609org.highwire.dtl.DTLVardef@346dbforg.highwire.dtl.DTLVardef@1144dd_HPS_FORMAT_FIGEXP M_FIG C_FIG
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