Further in vitro studies showed that IC50 value for [177Lu]Lu-BQ7876 is close to the value for [177Lu]Lu-PSMA-617 (Figure 4), i.e. the [177Lu]Lu-BQ7876 binding strength to living PSMA-expressing PCa cells is as equally good as the binding strength of [177Lu]Lu-PSMA-617. The gene discussed is FOLH1; the disease is posterior cortical atrophy.