Drug intelligence / Profile preview

[177Lu]Lu-iGRP78

Development stage
Preclinical
Modality
Small Molecules, Antibody-Radionuclide Conjugates → Antibody Conjugates → Antibody-Based Therapeutics
Administration
Intravenous
01

Overview

[177Lu]Lu-iGRP78 is an experimental radiopharmaceutical designed for targeted radionuclide therapy, specifically for the treatment of castration-resistant prostate cancer. It consists of a ligand (iGRP78) that selectively binds to Glucose-Regulated Protein 78 (GRP78), which is chelated with the beta-emitting radioisotope lutetium-177. While GRP78 is primarily an endoplasmic reticulum chaperone, it is overexpressed on the cell surface (CS-GRP78) of various aggressive cancer cells. By targeting CS-GRP78, [177Lu]Lu-iGRP78 delivers localized ionizing radiation to tumor cells, causing DNA damage and subsequent apoptosis. In preclinical research, this monomeric agent is often evaluated as a component of bispecific radioligands, such as [177Lu]Lu-iPSMA-iGRP78, to enhance cellular internalization and therapeutic efficacy compared to monotherapy targeting PSMA alone.

Other names
Lutetium-177 iGRP78Lutetium177 iGRP78Lutetium 177 iGRP78[177Lu]-iGRP78
02

Targets

HSPA5 (Heat shock protein family A member 5)

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