BioTech Encyclopedia

Elements · ← Ac Actinium · Pa Protactinium →

Th Thorium

Thorium-227 is an alpha emitter studied in antibody-based targeted therapy.

Basic facts

SymbolTh
Atomic number90
Standard atomic weight232.038
Groupnone (actinide series)
Period7
Blockf-block
CategoryActinide
Standard stateSolid
Discovered1828

Source: PubChem, Thorium (periodic table data, retrieved 2026-10-19). Group and period follow the standard 18-column periodic table.

Biotech uses & experiments

radiotherapy

lab radiotherapy 2020

Thorium-227 conjugate for prostate cancer

Hammer and colleagues developed PSMA-TTC, a fully human PSMA antibody carrying the alpha emitter thorium-227, which showed strong antitumour activity in mouse models of prostate cancer, including models resistant to enzalutamide.

Built / tested: PSMA-TTC (BAY 2315497)

As reported in: Hammer, Hagemann, Zitzmann-Kolbe et al. (2020). Preclinical Efficacy of a PSMA-Targeted Thorium-227 Conjugate (PSMA-TTC), a Targeted Alpha Therapy for Prostate Cancer. Clinical Cancer Research. doi:10.1158/1078-0432.ccr-19-2268

Read free · publisher open access

Patents

Search Google Patents for thorium in biological and medical uses: all patents · recent applications (2022+)

A patent is a legal claim, not proof that something works. See the Patents page.