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Sipuleucel-T (Sip-T) in Combination With N-803 in Metastatic Androgen Pathway Modulation Resistant (mAPMR) Prostate Cancer

6 augustus 2026 bijgewerkt door: Washington University School of Medicine

A Phase Ib Study Evaluating the Safety and Tolerability of Sipuleucel-T (Sip-T) in Combination With N-803 in Patients With Metastatic Androgen Pathway Modulation Resistant (mAPMR) Prostate Cancer

This phase Ib single-center open-label de-escalation study uses a modified 3+3 design to determine the safety, tolerability, and recommended phase II dose (RP2D) of the combination of standard of care Sip-T and N-803 in patients with metastatic androgen pathway modulation resistant (mAPMR) prostate cancer. Patients will receive treatment for up to 8 weeks.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Studietype

Ingrijpend

Inschrijving (Geschat)

30

Fase

  • Fase 1

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

  • Verenigde Staten
    • Missouri
      • St Louis, Missouri, Verenigde Staten, 63110
        • Washington University School of Medicine
        • Onderonderzoeker:
          • Jingqin Rosy Luo, Ph.D.
        • Contact:
        • Hoofdonderzoeker:
          • Russell K Pachynski, M.D.
        • Onderonderzoeker:
          • Peter Oppelt, M.D.
        • Onderonderzoeker:
          • Eric Knoche, M.D.
        • Onderonderzoeker:
          • Melissa Reimers, M.D.
        • Onderonderzoeker:
          • Jade Tao, Ph.D.
        • Onderonderzoeker:
          • Mark Sundermeyer, M.D.
        • Hoofdonderzoeker:
          • Daniel Thorek, Ph.D.
        • Onderonderzoeker:
          • John Visconti, D.O.
        • Onderonderzoeker:
          • Wilbur Song, M.D.

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Nee

Beschrijving

Inclusion Criteria:

  • Histologically or cytologically confirmed prostate adenocarcinoma.
  • Imaging- or biopsy-proven metastatic disease. May have any type or location of metastases (bone, lymph node, visceral).
  • Prior treatment must include either orchiectomy or luteinizing hormone-releasing agonist or antagonist treatment with documented testosterone ≤ 50 ng/dL.
  • Eligible for standard of care Sipuleucel-T.
  • Recovery to baseline or ≤ grade 1 from toxicities related to any prior treatments, unless AEs are clinically nonsignificant and/or stable on supportive therapy.
  • At least 18 years of age.
  • ECOG performance status ≤ 2

  • Adequate bone marrow and organ function as defined below:

    • Absolute neutrophil count ≥ 1,500 K/cumm without granulocyte colony-stimulating factor support
    • Platelets ≥ 100,000 K/cumm without transfusion
    • Hemoglobin ≥ 10.0 g/dL
    • Total bilirubin ≤ 1.5 x IULN
    • AST(SGOT) and ALT(SGPT) ≤ 2.5 x IULN
    • Calculated creatinine clearance ≥ 50 mL/min by Cockcroft-Gault
  • PSA ≤ 200 ng/mL.
  • Ability to understand and willingness to sign an IRB approved written informed consent document. Legally authorized representatives may sign and give informed consent on behalf of study participants

Exclusion Criteria:

  • Rapidly progressing disease or symptomatic prostate cancer as assessed by the investigator.
  • Prior immunotherapy (e.g., anti-PD-1, anti-PD-L1, anti-CTLA4) within the 6 months prior to enrollment.
  • Prior systemic radiotherapy (such as Ra-223, Lu177-PSMA) within the 6 months prior to enrollment. Prior palliative radiation therapy for bone metastasis within 2 weeks or any other radiation therapy within 4 weeks before first dose of study treatment is allowed. Prior definitive radiation therapy for localized prostate cancer is allowed.
  • Prior exposure to Sipuleucel-T.
  • Ongoing systemic immune suppression (oral steroids equivalent to 10 mg daily prednisone or less are allowed; topical, inhaled, and intra-articular steroids are allowed).
  • Currently receiving any other investigational therapeutic or imaging agents.
  • Patients with known brain metastases or cranial epidural disease unless adequately treated with radiotherapy and/or surgery (including radiosurgery) and stable for at least 4 weeks prior to first dose of study treatment after radiotherapy or at least 4 weeks prior to first dose of study treatment after major surgery (e.g., removal or biopsy of brain metastasis). Subjects must have complete wound healing from major surgery or minor surgery before first dose of study treatment. Eligible subjects must be neurologically asymptomatic and without corticosteroid treatment at the time of first dose of study treatment.
  • A history of allergic reactions attributed to compounds of similar chemical or biologic composition to Sipuleucel-T or N-803 or other agents used in the study.
  • Uncontrolled intercurrent illness including, but not limited to: ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, or cardiac arrhythmia. Patients with a known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the New York Heart Association Function Classification; to be eligible for this trial, patients should be a class 2B or better.
  • HIV-infected if not on effective anti-retroviral therapy with undetectable viral load for 6 months. Patients with HIV who are receiving effective anti-retroviral therapy and have had an undetectable viral load for at least 6 months are eligible. HIV testing not required in the absence of known history of infection.
  • Evidence of chronic hepatitis B virus (HBV) that is detectable on suppressive therapy. Patients with evidence of chronic HBV infection with undetectable HBV viral load on suppressive therapy are eligible. HBV testing not required in the absence of known history of infection.
  • History of hepatitis C virus (HCV) infection that has not been cured or that has a detectable viral load. Patients with a history of HCV that has been treated and cured are eligible. Patients with HCV infection who are currently on treatment and have an undetectable HCV viral load are eligible. HCV testing not required in the absence of known history of infection.
  • Uncontrolled infection with hepatitis A.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Niet-gerandomiseerd
  • Interventioneel model: Sequentiële toewijzing
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Cohort 1: Dose level 0 Starting dose: N-803 + SIP-T
Patients will receive standard dose (>50 million CD54+ cells) subcutaneous (SC) SIP-T on Day 1, 15 and 29 and 15 mcg/kg SC dose of N-803 24 hours after SIP-T on Day 2, 16, and 30.
Biologisch: Sipuleucel-T
Sipuleucel-T is a cellular therapeutic vaccine given in 3 complete doses at 2-week intervals intravenously.
Andere namen:
  • Provenge
  • SipT
Biologisch: N803
N-803 is a biologic that is administered subcutaneously in the abdominal area.
Experimenteel: Cohort 1: Dose level -1: N-803 + SIP-T
Patients will receive standard dose (>50 million CD54+ cells) subcutaneous (SC) SIP-T on Day 1, 15 and 29 and 10 mcg/kg SC dose of N-803 24 hours after SIP-T on Day 2, 16, and 30.
Biologisch: Sipuleucel-T
Sipuleucel-T is a cellular therapeutic vaccine given in 3 complete doses at 2-week intervals intravenously.
Andere namen:
  • Provenge
  • SipT
Biologisch: N803
N-803 is a biologic that is administered subcutaneously in the abdominal area.
Experimenteel: Cohort 1: Dose level -2: N-803 + SIP-T
Patients will receive standard dose (>50 million CD54+ cells) subcutaneous (SC) SIP-T on Day 1, 15 and 29 and 6 mcg/kg SC dose of N-803 24 hours after SIP-T on Day 2, 16, and 30.
Biologisch: Sipuleucel-T
Sipuleucel-T is a cellular therapeutic vaccine given in 3 complete doses at 2-week intervals intravenously.
Andere namen:
  • Provenge
  • SipT
Biologisch: N803
N-803 is a biologic that is administered subcutaneously in the abdominal area.
Experimenteel: Cohort 2: N-803 + SIP-T
Patients will receive standard dose (>50 million CD54+ cells) subcutaneous (SC) SIP-T on Day 1, 15 and 29 and recommended phase 2 dose (RP2D) of N-803 24 hours after SIP-T on Day 2, 16, and 30. An additional dose of N-803 will occur on Day -5 or 5 days before first SIP-T dose.
Biologisch: Sipuleucel-T
Sipuleucel-T is a cellular therapeutic vaccine given in 3 complete doses at 2-week intervals intravenously.
Andere namen:
  • Provenge
  • SipT
Biologisch: N803
N-803 is a biologic that is administered subcutaneously in the abdominal area.
Experimenteel: Cohort 3: N-803 + SIP-T
Patients will receive standard dose (>50 million CD54+ cells) subcutaneous (SC) SIP-T on Day 1, 15 and 29 and RP2D of N-803 24 hours after SIP-T on Day 2, 16, and 30. An additional dose of N-803 will occur on Day 37.
Biologisch: Sipuleucel-T
Sipuleucel-T is a cellular therapeutic vaccine given in 3 complete doses at 2-week intervals intravenously.
Andere namen:
  • Provenge
  • SipT
Biologisch: N803
N-803 is a biologic that is administered subcutaneously in the abdominal area.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Frequency of dose-limiting toxicities (Cohort 1 only)
Tijdsspanne: Start of treatment (day 1 dose of Sip-T) through 14 days following the last dose of N-803 (total time up to 44 days)
As assessed via CTCAE v6.0. Dose limiting toxicities will be evaluated according to protocol.
Start of treatment (day 1 dose of Sip-T) through 14 days following the last dose of N-803 (total time up to 44 days)
Recommended Phase II Dose (RP2D) (Cohort 1 only)
Tijdsspanne: Start of treatment (day 1 dose of Sip-T) through 14 days following the last dose of N-803 for all participants in Cohort 1 (total time up to 44 days)
RP2D is defined as the highest dose of N-803 that has an overall DLT rate of less than 33% in total of 6 patients.
Start of treatment (day 1 dose of Sip-T) through 14 days following the last dose of N-803 for all participants in Cohort 1 (total time up to 44 days)
Number of severe (grade 3+) adverse events measured via CTCAE v6.0
Tijdsspanne: Start of treatment through 100 days after last dose of N-803 (total time up to 137 days)
Start of treatment through 100 days after last dose of N-803 (total time up to 137 days)
Number and type of adverse events measured via CTCAE v6.0
Tijdsspanne: Start of treatment through 100 days after last dose of N-803 (total time up to 137 days)
Start of treatment through 100 days after last dose of N-803 (total time up to 137 days)

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
PSA30 Response
Tijdsspanne: Start of treatment to completion of follow-up (up to 26 months)
PSA response rate is defined as the proportion of subjects who have PSA response as defined by at least 30% reduction in PSA level from baseline measured twice at least 3 weeks apart. PSA response is measured per PCWG3 criteria.
Start of treatment to completion of follow-up (up to 26 months)
PSA50 Response
Tijdsspanne: Start of treatment to completion of follow-up (up to 26 months)
PSA response rate is defined as the proportion of subjects who have PSA response as defined by at least 50% reduction in PSA level from baseline measured twice at least 3 weeks apart. PSA response is measured per PCWG3 criteria.
Start of treatment to completion of follow-up (up to 26 months)
PSA90 Response
Tijdsspanne: Start of treatment to completion of follow-up (up to 26 months)
PSA response rate is defined as the proportion of subjects who have PSA response as defined by at least 90% reduction in PSA level from baseline measured twice at least 3 weeks apart. PSA response is measured per PCWG3 criteria.
Start of treatment to completion of follow-up (up to 26 months)
Radiographic progression-free survival (PFS)
Tijdsspanne: Start of treatment to date of progression or death or last follow-up (up to 26 months)
rPFS is defined as the duration of time from start of treatment to time of radiographic progression by PCWG3 or time of death or last follow-up, the event that occurs first. Patients who have not experienced either event at the time of analysis will be censored at their last radiographic scan date. All radiographic response criteria are assessed per PCWG3 criteria.
Start of treatment to date of progression or death or last follow-up (up to 26 months)
Failure-free survival (FFS)
Tijdsspanne: Start of treatment to date of any progression events or last follow-up (up to 26 months)
Failure-free survival which is defined from date of treatment start to date of any progression events (radiographic progression, biochemical recurrence, or death, whichever is earlier) or date of last follow-up if experiencing no events
Start of treatment to date of any progression events or last follow-up (up to 26 months)
Time to next therapy (TTNT)
Tijdsspanne: Through completion of follow-up (up to 26 months)
Through completion of follow-up (up to 26 months)
Overall survival (OS)
Tijdsspanne: Start of treatment to death or last follow-up (up to 26 months)
Overall survival is defined as the date of treatment start to date of death or date of last follow-up.
Start of treatment to death or last follow-up (up to 26 months)

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Washington University School of Medicine

Medewerkers

ImmunityBio, Inc.
Dendreon

Onderzoekers

  • Hoofdonderzoeker: Russell K Pachynski, M.D., Washington University School of Medicine

Publicaties en nuttige links

De persoon die verantwoordelijk is voor het invoeren van informatie over het onderzoek stelt deze publicaties vrijwillig ter beschikking. Dit kan gaan over alles wat met het onderzoek te maken heeft.

Nuttige links

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

30 november 2026

Primaire voltooiing (Geschat)

14 april 2029

Studie voltooiing (Geschat)

31 januari 2031

Studieregistratiedata

Eerst ingediend

6 augustus 2026

Eerst ingediend dat voldeed aan de QC-criteria

6 augustus 2026

Eerst geplaatst (Werkelijk)

10 augustus 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

10 augustus 2026

Laatste update ingediend die voldeed aan QC-criteria

6 augustus 2026

Laatst geverifieerd

1 augustus 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • 26-x147

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

JA

Beschrijving IPD-plan

De-identified individual participant data that underlie the results reported will be available for investigators with approval by an independent review committee.

IPD-tijdsbestek voor delen

Data will be made available beginning 9 months and ending 36 months following publication.

IPD-toegangscriteria voor delen

Investigators who have approval to use the data by an independent review committee.

IPD delen Ondersteunend informatietype

  • LEERPROTOCOOL
  • SAP

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Ja

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

product vervaardigd in en geëxporteerd uit de V.S.

Ja

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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