FAPI-X5 is a fibroblast activation protein (FAP) inhibitor. FAPI-X5 binds to the FAP catalytic domain, forming hydrogen bonds with key active residues and engaging in π-π stacking to drive functional inhibition. FAPI-X5 exhibits albumin binding activity to prolong systemic circulation half-life. FAPI-X5 induces cytostatic effects on glioblastoma tumors, slowing tumor growth without regression. FAPI-X5, when labeled with 68Ga, acts as a PET tracer with rapid tumor uptake and high-contrast imaging in glioblastoma tumor-bearing mice. FAPI-X5, when labeled with 177Lu or 47Sc, functions as a targeted radionuclide agent with prolonged tumor retention. FAPI-X5 can be used for the research of glioblastoma.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.