PET imaging and terminal tissue analysis of Dox-64Cu-DOTA-LNP in NOD-SCID mice bearing PSMA-positive LNCap prostate tumors. (A) PET imaging of 64Cu-DOTA-Dox-LNP. Dox-64Cu-DOTA-LNP was injected into two male NOD/SCID mice bearing LnCap tumors and PET imaged at 4 and 20 hours. (B) Terminal tissue data of Dox-64Cu-DOTA-LNP. After the final PET image was acquired, mice were euthanized, tissues weighed and counted for radioactivity for biodistribution analysis. The data are expressed for the two individual mice as % ID/g for major organs at the terminal time point of 20 hours. Dox, doxorubicin; LNP, lipid nanoparticle; NOD/SCID, non-obese diabetic severe combined immune deficiency; PET, positron emission tomography; PSMA, prostate-specific membrane antigen.