Figure 5. Antibody- and VHH-mediated targeting of nanoparticles to T cells in vivo.
(a) C57Bl/6 mice (n=3 animals/group) were injected i.v. with 150 µg amph-NPs or anti-CD8-NPs, and particle uptake in PBMCs was analyzed 24 hr later by mass cytometry. (b-d) C57Bl/6 mice (n=3 animals/group) were injected i.v. with 100 µg amph-NPs or VHH-NPs. Twenty-four hr later particle uptake in leukocytes was analyzed by mass cytometry. Shown is uptake in peripheral blood lymphocytes (b) and myeloid cells (c), representative mass cytometry plots from several cell populations showing percentages of NP+ cells (d), and quantitation of the mean NP+ cells (e). **** p < 0.0001; ***, p < 0.001; **, p < 0.01; *, p < 0.05; n.s. not significant by two-way ANOVA with Tukey’s multiple comparison test.