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First-Time-in-Human Study of GSK5471713 in Adults With mCRPC

A Phase 1/2 First-Time-in-Human, Open-label, Multicenter, Dose Escalation and Dose Optimization Study of GSK5471713 in Adult Participants With Metastatic Castration Resistant Prostate Cancer (mCRPC) - A Phase 1/2 First-Time-in-Human study of GSK5471713 in adults with mCRPC

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2031250732
Enrollment
54
Registered
2026-02-13
Start date
2026-03-12
Completion date
Unknown
Last updated
2026-06-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Metastatic Castration Resistant Prostate Cancer

Interventions

GSK5471713 will be administered at different dose levels based on the dose escalation study design

Sponsors

Ishibashi Hideyasu
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: - Participants with mCRPC that have histologically or cytologically confirmed adenocarcinoma of the prostate. - Participants with mCRPC that has prostate cancer progression while on Androgen deprivation therapy (ADT). - Eastern Cooperative Oncology Group performance status 0 or 1. - Progression on ADT and >=1 prior Androgen receptor pathway inhibitors for Hormone-Sensitive Prostate Cancer or Castration resistant prostate cancer and received 1-2 prior taxane based chemotherapy regimens.

Exclusion criteria

Exclusion criteria: - Pathological finding consistent with small cell, neuroendocrine carcinoma of the prostate, or any histology different from adenocarcinoma. - Impaired cardiac function or clinically significant cardiac disease. - Any significant medical condition, such as uncontrolled infection or clinically significant laboratory abnormality. - Prior therapy with Androgen receptor degrader targeted therapy. - Other protocol-defined inclusion/exclusion criteria apply.

Design outcomes

Primary

MeasureTime frame
- Number of participants with dose limiting toxicities (DLTs) [Time Frame: 28 days] - Number of participants with adverse events (AEs), and serious adverse events (SAEs) [Time Frame: Approximately 45 months] - Number of participants with adverse events (AEs), and serious adverse events (SAEs) by Severity [Time Frame: Approximately 45 months] - Number of participants with AEs leading to dose modifications [Time Frame: Approximately 45 months]

Secondary

MeasureTime frame
- Maximum plasma concentration (Cmax) of GSK5471713 [Time Frame: Approximately 45 months] - Area under the plasma concentration-time curve from 0 to t (AUC[0-t]) of GSK5471713 [Time Frame: Approximately 45 months] - Time to maximum plasma concentration (Tmax) of GSK5471713 [Time Frame: Approximately 45 months] - Prostate-specific Antigen Decrease from Baseline >=50% (PSA50) Response Rate [Time Frame: Approximately 45 months] - PSA50 response is defined as a greater than or equal to (>=)50 percent (%) decline in PSA from Baseline, confirmed at least 3 weeks later. - Objective response rate (ORR) per Prostate Cancer Working Group 3 (PCWG3) by investigator assessment [Time Frame: Approximately 45 months] - ORR is defined as the percentage of participants in the ORR Evaluable set who have the Best overall response (BOR) of confirmed Complete response (CR) or Partial response (PR) per PCWG3 guidelines as assessed by investigator.

Countries

Canada, Japan, United States

Contacts

Public ContactHideyasu Ishibashi

GlaxoSmithKline K.K.

jp.gskjrct@gsk.com+81-120-561-007

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jun 11, 2026