UPDATE: Memantine for Neuroendocrine Prostate Cancer, Early Efficacy Signals

Prostate cancer can become harder to treat when it changes from the usual adenocarcinoma form into neuroendocrine prostate cancer, or NEPC. A recent study suggests that this transition may begin earlier than expected, during an intermediate phase when the cells are still partly prostate-like but are already starting to acquire neuroendocrine features. A central finding […]

Early Phase 1 Trial of GRPR-Targeted Theranostic DOTA-STR-17126

A first-in-human imaging trial of DOTA-STR-17126 just started in Australia. It is an open-label, single-arm early phase 1 study enrolling up to 20 adults with advanced or metastatic prostate or breast cancer who have exhausted standard treatments. The trial uses a theranostic approach. Participants receive gallium-68 DOTA-STR-17126 for PET imaging to detect tumors expressing the […]

UPDATE: ABBV-969 Shows Very Promising rFPS in mCRPC

ABBV-969 is a dual-target antibody-drug conjugate targeting PSMA and STEAP1, data about its radiographic progression-free survival data have just been released, confirming a median rPFS of approximately 15 months in heavily pretreated metastatic castration-resistant prostate cancer. The study demonstrates a signal far exceeding the 4- to 5-month rPFS historically seen with cabazitaxel in the same […]

CD46 ImmunoPET in mCRPC: A New Theranostic Axis Beyond PSMA

CD46 is a cell‑surface protein that stays highly expressed in aggressive, late‑stage prostate cancer, including PSMA‑low, AR‑negative and neuroendocrine variants. That means CD46 immunoPET can still “see” and quantify disease that PSMA PET misses, and can guide CD46‑targeted therapies in exactly those PSMA‑low/negative patients who respond poorly to PSMA‑directed radioligand therapy. Using the human antibody […]

Phase 1/2 Trial: Epigenetic KAT6 Inhibitor Plus Darolutamide in mCRPC

A Phase 1b/2 trial is planned to test the investigational KAT6 inhibitor OP-3136 combined with darolutamide in metastatic castration-resistant prostate cancer (mCRPC). About 36 patients will be enrolled, with the study expected to start in the second half of 2026. The focus is on safety, tolerability, and early signs of anti-tumor activity. OP-3136 blocks KAT6A/B, […]

ABBV-969 in mCRPC: Dual‑Targeting ADC Shows Robust PSA and Objective Responses in Heavily Pretreated Patients

ABBV-969, a first-in-class dual-targeting antibody-drug conjugate (ADC), is emerging as a promising new therapeutic candidate for patients with metastatic castration-resistant prostate cancer (mCRPC), particularly in the late-line setting where treatment options are limited and outcomes remain poor. Designed to simultaneously target prostate-specific membrane antigen (PSMA) and six-transmembrane epithelial antigen of prostate 1 (STEAP1), both highly […]

Overcoming AR Mutations in Prostate Cancer: Phase 1 Results of HRS-5041

A new investigational drug, HRS-5041, may offer a compelling strategy to overcome resistance to androgen receptor (AR)-targeted therapies.. Unlike traditional AR inhibitors, HRS-5041 is an oral androgen receptor degrader designed to eliminate the receptor itself, including clinically relevant mutant forms. In a phase 1, 156 patients with mCRPC were treated with HRS-5041. All patients had […]

Targeted Alpha Therapy Plus PARP Blockade: AZD2265 plus AZD9574 for Advanced Prostate Cancer

There is a new flexible trial for men with metastatic prostate cancer that has stopped responding to hormone therapy. Phase 1/2 PROSPECTOR trial tests three options: a PSMA‑targeted radioactive drug (AZD2265), the same drug combined with a PARP1 inhibitor (AZD9574), and standard docetaxel chemotherapy. The first part of the trial finds safe dose levels and […]

Phase 1 Trial: GTB-5550, Another B7-H3 NK-targeted Therapy for mCRPC

GTB-5550 has begun Phase 1 clinical testing in solid tumors, marking the first patient dosing in a dose-escalation basket study. The trial is starting with prostate cancer, a setting where B7-H3 is reportedly highly expressed and where treatment options remain limited in the metastatic castration-resistant stage. The therapy is being delivered subcutaneously, which is notable […]

Phase 1 Trial: INR731 for mCRPC

INR731 is an oral, investigational anticancer drug now entering first‑in‑human testing for men with metastatic castration‑resistant prostate cancer (mCRPC). It is being evaluated in a global, open‑label Phase 1 study with the primary goal of defining its safety, tolerability, pharmacokinetics, pharmacodynamics, and a recommended dose for further development, rather than demonstrating efficacy at this stage. […]