FOLH1 and prostate neoplasm: The cellular uptake of IRDye700DX-PSMA towards the prostate tumour cells strictly followed the PSMA expression levels, with the highest avidity displayed by PC3-PIP cells (MFI 44812 ± 3883), while the uptake was much lower for LNCaP (MFI 3614 ± 2163), and almost negligible for the PSMA-negative cells PC3 (MFI 327 ± 68) and PC3-FLU (MFI 346 ± 91) (Figure 2A).