However, with the high systemic toxicity such as neutropenia and hypersensitivity, the clinical use is restricted to patients with metastatic castration-resistant prostate cancer who show progression after docetaxel-based chemotherapy... MPB-1734 can reduce the major dose-limiting side effect (neutropenia) of CBZ and increase the tolerated dose. With tumor targeting ability, superior antitumor effects were demonstrated as compared with commercial formulation in a range of cancer models. MPB-1734 combined with anti-PD-1 antibody showed synergistic benefit in tumor inhibition.