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GI-102 (CD80-IgG4 Fc-IL2v3) in Combination With Pasritamig in Patients With Metastatic Castration-resistant Prostate Cancer (mCRPC) (JET-201)

4. november 2026 opdateret af: GI Innovation, Inc.

A Phase 1b/2, Open-label, Multi-center Study to Evaluate the Anti-cancer Activity, Safety and Tolerability of GI-102 (CD80-IgG4 Fc-IL2v3) in Combination With Pasritamig [T-CELL-Redirecting Agent Targeting Human Kallikrein 2 (KLK2)] in Patients With Metastatic Castration-resistant Prostate Cancer (mCRPC) Who Progressed on Previous Novel Hormonal Therapy (NHT) (JET-201)

The purpose of this clinical trial is to evaluate the safety, tolerability, and preliminary anti-cancer activity of GI-102 in combination with pasritamig in adult men with metastatic castration-resistant prostate cancer (mCRPC) whose cancer has progressed after previous treatment with a novel hormonal therapy (NHT).

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

107

Fase

  • Fase 2
  • Fase 1

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • New York
      • New York, New York, Forenede Stater, 10032
        • Ikke rekrutterer endnu
        • Columbia University Medical Center
        • Ledende efterforsker:
          • Mark N. Stein, M.D.
      • Seoul, Sydkorea, 05505
        • Rekruttering
        • Asan Medical Center
        • Ledende efterforsker:
          • Jae Lyun Lee, M.D., Ph.D.
      • Seoul, Sydkorea, 03722
        • Rekruttering
        • Yonsei University Health System, Severance Hospital
        • Ledende efterforsker:
          • Sang Joon Shin, M.D., Ph.D.
    • Banpo-daero
      • Seoul, Banpo-daero, Sydkorea, 06591
        • Rekruttering
        • The Catholic University of Korea Seoul ST.MARY'S Hospital
        • Ledende efterforsker:
          • In Ho Kim
    • Seongbuk-gu
      • Seoul, Seongbuk-gu, Sydkorea, 02841
        • Rekruttering
        • Korea University Anam Hospital
        • Ledende efterforsker:
          • Jwa Hoon Kim, M.D.
    • Yangcheon-gu
      • Seoul, Yangcheon-gu, Sydkorea, 07985
        • Rekruttering
        • Ewha Womans University Mokdong Hospital
        • Ledende efterforsker:
          • Jeong Min Cho

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Han

Beskrivelse

Key Inclusion Criteria:

  • Male participants aged ≥18 years (or ≥19 years according to local regulatory requirements).
  • ECOG performance status of 0 to 1.
  • Histologically confirmed advanced prostate adenocarcinoma with measurable or evaluable disease. Adenocarcinoma with small cell or neuroendocrine (NE) features is permitted. However, primary small cell carcinoma, carcinoid tumor, mixed NE carcinoma, or large cell NE carcinoma (or pathologic evidence of conversion to) is disallowed.
  • Metastatic castration-resistant prostate cancer (mCRPC) with documented disease progression following at least one line of novel androgen receptor-targeted therapy.
  • PSA ≥2 ng/mL at screening.
  • No more than 2 prior taxane regimens and no prior cytotoxic chemotherapy other than taxane therapy.
  • Prior orchiectomy or ongoing androgen deprivation therapy with castrate testosterone levels.
  • Adequate organ and marrow function and adequate cardiovascular function.
  • Adequate recovery from prior anticancer therapy-related adverse events.
  • Willingness and ability to comply with study procedures and protocol-specified contraception requirements.

Key Exclusion Criteria:

  • Active or prior CNS metastases, carcinomatous meningitis, or clinically unstable spinal cord compression.
  • Significant uncontrolled cardiovascular, pulmonary, hepatic, autoimmune, infectious, or other systemic disease.
  • Active or recent clinically significant infection, including active tuberculosis, hepatitis B, or hepatitis C.
  • Active pneumonitis or interstitial lung disease (ILD), or history of clinically significant pneumonitis/ILD.
  • Recent treatment with investigational products, prohibited immunomodulating agents, radiotherapy, major surgery, or other protocol-defined prohibited therapies.
  • Prior treatment with CD3-directed therapies, including KLK2-CD3 bispecific antibodies or other CD3-targeting T-cell engagers.
  • Known hypersensitivity to GI-102, pasritamig, or their excipients, or any other condition that may interfere with study participation or interpretation of results.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Ikke-randomiseret
  • Interventionel model: Sekventiel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Safety run-in: GI-102 + pasritamig (Schedule A)

Participants receive GI-102 in combination with pasritamig during the Safety run-in phase. Dose escalation is guided by a Bayesian Optimal Interval (BOIN) design.

GI-102 will be administered in accordance with the procedures specified in the study protocol.

Pasritamig will be administered in accordance with the procedures specified in the study protocol.

Eksperimentel: Safety run-in: GI-102 + pasritamig (Schedule B)

Participants receive GI-102 in combination with pasritamig during the Safety run-in phase. Dose escalation is guided by a Bayesian Optimal Interval (BOIN) design.

GI-102 will be administered in accordance with the procedures specified in the study protocol.

Pasritamig will be administered in accordance with the procedures specified in the study protocol.

Eksperimentel: Expansion

Participants enrolled in the Expansion phase will receive the combination recommended Phase 2 regimen (cRP2R) of GI-102 and pasritamig, determined based on the safety and dose-escalation results from the Safety run-in phase.

GI-102 will be administered in accordance with the procedures specified in the study protocol.

Pasritamig will be administered in accordance with the procedures specified in the study protocol.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Incidence and nature of DLTs (Safety run-in phase)
Tidsramme: From Day -14 to Cycle 1 Day 22 (35 days)

A DLT is defined as a clinically significant AE (classified according to the NCI CTCAE version 6.0) or significant laboratory abnormality that occur during the DLT assessment periods, and is considered by the Investigator to be related to the study drug(s).

From Day -14 to Cycle 1 Day 22 (35 days)
Incidence, nature, and severity of AEs graded according to CTCAE v6.0 (Safety run-in phase)
Tidsramme: Up to 2 years

An adverse event (AE) is any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with the treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a pharmaceutical product, whether or not considered related to the pharmaceutical product. Preexisting conditions which worsen during a study are also considered as AEs. All AE events will be graded according to National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 6.0.

Up to 2 years
PSA response rate (≥ 50% decline from baseline) per PCWG3 (Expansion phase)
Tidsramme: Up to 2 years

PSA response rate is defined as the percentage of participants with a decline of PSA of 50% or more from baseline.

Up to 2 years

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
PSA response rate (≥ 50% and ≥ 90% decline from baseline) per PCWG3 (Safety run-in phase)
Tidsramme: Up to 2 years

PSA response rate is defined as the percentage of participants with a decline of PSA of 50% (or 90%) or more from baseline.

Up to 2 years
Radiographic PFS per PCWG3
Tidsramme: Up to 2 years

Radiographic PFS is defined as the time from the date of first dose of any study treatment until the date of radiographic disease progression or death, whichever comes first.

Up to 2 years
Time to PSA progression
Tidsramme: Up to 2 years

Time to PSA progression, defined as the time from baseline to the first date of documented PSA progression per PCWG3 criteria.

Up to 2 years
Overall Response Rate (ORR) per RECIST v1.1
Tidsramme: Up to 2 years

Among participants with measurable disease, ORR is defined as the percentage of participants who achieve a partial response (PR) or complete response (CR) according to RECIST v1.1.

Up to 2 years
Duration of Response (DoR) per RECIST v1.1
Tidsramme: Up to 2 years

Among participants with measurable disease who achieve a CR or PR, DoR is defined as the time from the first documented CR or PR until the first documented disease progression according to RECIST v1.1 or death from any cause, whichever occurs first.

Up to 2 years
Disease Control Rate (DCR) per RECIST v1.1
Tidsramme: Up to 2 years

Among participants with measurable disease, DCR is defined as the percentage of participants who achieve a CR, PR, or stable disease (SD) according to RECIST v1.1.

Up to 2 years
Incidence, nature, and severity of AEs graded according to CTCAE v6.0 (Expansion phase)
Tidsramme: Up to 2 years

An adverse event (AE) is any untoward medical occurrence in a participant administered a pharmaceutical product and which does not necessarily have to have a causal relationship with the treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of a pharmaceutical product, whether or not considered related to the pharmaceutical product. Preexisting conditions which worsen during a study are also considered as AEs. All AE events will be graded according to National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 6.0.

Up to 2 years
PK profile: peak plasma concentration (Cmax) of GI-102 when combined with pasritamig
Tidsramme: Up to 2 years

Plasma concentrations of GI-102 will be measured at specified time points following administration of GI-102 in combination with pasritamig to determine the maximum observed plasma concentration (Cmax).

Up to 2 years
PK profile: half-life (T1/2) of GI-102 when combined with pasritamig
Tidsramme: Up to 2 years

Plasma concentrations of GI-102 will be measured at specified time points following administration of GI-102 in combination with pasritamig to determine the terminal half-life (T1/2) of GI-102.

Up to 2 years
PK profile: area under the plasma concentration-time curve (AUC) of GI-102 when combined with pasritamig
Tidsramme: Up to 2 years

Plasma concentrations of GI-102 will be measured at specified time points following administration of GI-102 in combination with pasritamig to determine the area under the plasma concentration-time curve (AUC) of GI-102.

Up to 2 years

Andre resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Immune cell phenotyping in peripheral blood
Tidsramme: Up to 2 years

Immune cell populations and their changes following study treatment will be assessed in peripheral blood using flow cytometry.

Up to 2 years
Overall Response Rate (ORR) per iRECIST
Tidsramme: Up to 2 years

ORR is defined as the percentage of participants who achieve a partial response (PR) or complete response (CR) according to the iRECIST criteria.

Up to 2 years
Overall Survival (OS)
Tidsramme: Up to 2 years

Overall survival (OS) is defined as the time from the first dose of study treatment to death from any cause.

Up to 2 years
Incidence of anti-GI-102 antibody (ADA)
Tidsramme: Up to 2 years

Serum samples will be analyzed using a validated assay to determine the incidence of anti-GI-102 antibodies (ADA).

Up to 2 years
Incidence of Neutralizing Antibody (Nab) Against GI-102
Tidsramme: Up to 2 years

Serum samples that are positive for anti-GI-102 antibodies (ADA) will be further analyzed using a validated assay to determine the incidence of neutralizing antibodies (Nab).

Up to 2 years

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

12. oktober 2026

Primær færdiggørelse (Anslået)

31. marts 2029

Studieafslutning (Anslået)

30. september 2029

Datoer for studieregistrering

Først indsendt

1. oktober 2026

Først indsendt, der opfyldte QC-kriterier

6. oktober 2026

Først opslået (Faktiske)

13. oktober 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

9. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

4. november 2026

Sidst verificeret

1. november 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • GII-102-P201 (JET-201)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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