PM&EM-NP-mediated
delivery to the heart failure mice and biodistribution
in other organs. (a) CLSM images of different DiI-labeled nanoparticles
at fibrotic sites of the heart in the heart failure mice at 24 h postintravenous
injection, scale bar = 5 μm, 20 μm. (b) CLSM images of
different DiI-labeled nanoparticles in kidney and liver of the heart
failure mice at 24 h postintravenous injection, scale bar = 15 μm.
(c) Representative ex vivo fluorescence images of DiD fluorescence
dye accumulated in different organs at 24 h postintravenous injection
of DiD-labeled nanoparticles. (d) Heatmap of DiD fluorescence dye
in different organs (n = 3). (e) Quantitative data
of DiD fluorescence dye in the heart (mean ± SD, n = 3) **p < 0.01, one-way ANOVA, Tukey’s
multiple comparison test.