The Efficacy and Safety of PRTX007-003 Combined With Pembrolizumab in Resectable Stage III Melanoma (INFLECTION-003)
A Phase 2 Study to Investigate the Activity of Neoadjuvant PRTX007 Combined With Pembrolizumab in Participants With Stage III Melanoma (INFLECTION-003)
This Phase 2, multi-center, single-arm study evaluates the safety, tolerability, and activity of neoadjuvant PRTX007 in combination with pembrolizumab in participants with resectable Stage III melanoma. Neoadjuvant immunotherapy has demonstrated improved clinical outcomes compared with adjuvant-only approaches, but there remains a need to enhance pathologic response rates without significant added toxicity.
Participants will receive oral PRTX007, a Toll-like receptor 7 (TLR7) agonist prodrug, administered in combination with intravenous pembrolizumab prior to surgical resection. The primary objective is to determine the major pathologic response (MPR) rate following neoadjuvant therapy. Secondary objectives include evaluation of safety, pathologic complete response, event-free survival, overall survival, pharmacokinetics, and immune-related biomarkers.
This study aims to determine whether the addition of PRTX007 to pembrolizumab improves antitumor immune responses and clinical outcomes in patients with Stage III melanoma.
Przegląd badań
Status
Status
Warunki
Warunki
Interwencja / Leczenie
Interwencja / Leczenie
Szczegółowy opis
This study investigates whether combining the TLR7 agonist PRTX007 with pembrolizumab enhances immune-mediated tumor response in the neoadjuvant setting for Stage III melanoma, with the goal of improving pathologic response rates and clinical outcomes while maintaining an acceptable safety profile.
Design This is a Phase 2, multi-center, open-label, single-arm study conducted in Australia. The study will enroll approximately 48 participants with resectable Stage III melanoma.
The study consists of two parts:
- Part A: 24 participants will be enrolled, including an initial dose-escalation safety run-in using a 3+3 design to evaluate tolerability and dose-limiting toxicities.
- Part B: An additional 24 participants will be enrolled if sufficient activity is observed in Part A.
Treatment Plan
Participants will receive neoadjuvant therapy consisting of:
- PRTX007: Oral administration for 3 days on and 4 days off per week for 9 cycles (7-day cycles)
- Pembrolizumab: 200 mg intravenous infusion every 3 weeks for 3 cycles Following completion of neoadjuvant therapy, participants will undergo definitive surgical resection.
Post-surgical treatment will be response-adapted:
- Participants achieving MPR may receive observation or pembrolizumab alone
- Participants without MPR will receive adjuvant PRTX007 in combination with pembrolizumab
Typ studiów
Typ studiów
Zapisy (Szacowany)
Zapisy
Faza
Faza
- Faza 2
Kontakty i lokalizacje
Kontakt w sprawie studiów
Kontakt w sprawie studiów
- Nazwa: Gunjan Mody
- Numer telefonu: +61 2 9199 9596
- E-mail: gunjan.mody@novotech-cro.com
Lokalizacje studiów
-
-
New South Wales
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Waratah, New South Wales, Australia, 2298
- Rekrutacyjny
- Calvary Mater Newcastle
-
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Queensland
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Cairns, Queensland, Australia, 4870
- Jeszcze nie rekrutacja
- Cairns And Hinterland Hospital And Health Service
-
Greenslopes, Queensland, Australia, 4120
- Jeszcze nie rekrutacja
- Gallipoli Medical Research
-
Woolloongabba, Queensland, Australia, 4102
- Jeszcze nie rekrutacja
- Princess Alexandra Hospital
-
-
Victoria
-
Melbourne, Victoria, Australia, 3000
- Jeszcze nie rekrutacja
- Peter MacCallum Cancer Centre
-
-
Western Australia
-
Nedlands, Western Australia, Australia, 6009
- Jeszcze nie rekrutacja
- Sir Charles Gairdner Hospital
-
Nedlands, Western Australia, Australia, 6009
- Rekrutacyjny
- One Clinical Research Pty Ltd
-
-
Kryteria uczestnictwa
Kryteria kwalifikacji
Kryteria kwalifikacji
Wiek uprawniający do nauki
- Dorosły
- Starszy dorosły
Akceptuje zdrowych ochotników
Opis
Inclusion Criteria:
- Adults aged 18 years or older
- Histologically confirmed, resectable Stage III cutaneous melanoma.
- Candidate for curative-intent surgical resection
- Eastern Cooperative Oncology Group (ECOG) performance status of 0-2
- Adequate organ function
- Able to provide written informed consent
Exclusion Criteria:
- Prior systemic therapy for melanoma, including immunotherapy
- Uveal melanoma or mucosal melanoma.
- Active autoimmune disease requiring systemic treatment
- Primary immunodeficiency or use of systemic immunosuppressive therapy
- Women who are pregnant or breastfeeding
- Recent treatment with another investigational therapy
- Any condition that, in the opinion of the investigator, would interfere with study participation or safety
Plan studiów
Jak projektuje się badanie?
Szczegóły projektu
- Główny cel: Leczenie
- Przydział: Nie dotyczy
- Model interwencyjny: Zadanie dla jednej grupy
- Maskowanie: Brak (otwarta etykieta)
Liczba ramion
Broń i interwencje
Grupa uczestników / ArmGrupa uczestników / Arm |
Interwencja / LeczenieInterwencja / Leczenie |
|---|---|
|
Eksperymentalny: Neoadjuvant PRTX007 + Pembrolizumab (Response-Adapted Adjuvant Therapy)
Participants with resectable Stage III melanoma will receive neoadjuvant treatment with PRTX007 in combination with pembrolizumab prior to definitive surgical resection.
Following surgery, participants will receive response-adapted adjuvant therapy based on pathologic response.
Participants achieving a major pathologic response (MPR) may receive observation or pembrolizumab alone, while participants without MPR will receive adjuvant PRTX007 in combination with pembrolizumab.
|
PRTX007 is an orally administered prodrug of PRX034, a Toll-like receptor 7 (TLR7) agonist designed to activate innate and adaptive immune responses. NEOADJUVANT REGIMEN
ADJUVANT REGIMEN (IF NO MPR)
Pembrolizumab is a programmed cell death protein-1 (PD-1) blocking antibody administered by intravenous infusion NEOADJUVANT REGIMEN
ADJUVANT REGIMEN
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Co mierzy badanie?
Podstawowe miary wyniku
Podstawowe miary wyniku
Miara wyniku |
Opis środka |
Ramy czasowe |
|---|---|---|
|
Major Pathologic Response (MPR) Rate
Ramy czasowe: At time of surgical resection (approximately 9 weeks after initiation of treatment)
|
Major pathologic response (MPR) is defined as ≤10% residual viable tumor cells in the resected tumor specimen following completion of neoadjuvant therapy, as assessed by central pathology review.
|
At time of surgical resection (approximately 9 weeks after initiation of treatment)
|
Miary wyników drugorzędnych
Miary wyników drugorzędnych
Miara wyniku |
Opis środka |
Ramy czasowe |
|---|---|---|
|
Incidence of Adverse Events (AEs), Serious Adverse Events (SAEs), Immune-Related AEs (irAEs), and Dose-Limiting Toxicities (DLTs)
Ramy czasowe: From first dose of study treatment through end of study (approximately up to 52 weeks)
|
Number and severity of adverse events, serious adverse events, immune-related adverse events, and dose-limiting toxicities, graded according to National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) version 6.0.
|
From first dose of study treatment through end of study (approximately up to 52 weeks)
|
|
Number of participants with abnormal physical examination findings, abnormal vital signs, abnormal Eastern Cooperative Oncology Group (ECOG) performance status, and abnormal clinical laboratory parameters
Ramy czasowe: Baseline through end of study (approximately up to 52 weeks)
|
Baseline through end of study (approximately up to 52 weeks)
|
|
|
Pathologic Complete Response (pCR) Rate
Ramy czasowe: At time of surgical resection (approximately 9 weeks after initiation of treatment)
|
Pathologic complete response (pCR) is defined as the absence of residual viable tumor cells (0%) in the resected tumor specimen following neoadjuvant therapy, as assessed by central pathology review.
|
At time of surgical resection (approximately 9 weeks after initiation of treatment)
|
|
Event-Free Survival (EFS)
Ramy czasowe: From first dose up to 1 year
|
Event-free survival (EFS) is defined as the time from first dose of study treatment to any of the following events: disease progression or toxicity preventing surgery during neoadjuvant treatment; recurrence of disease after surgery; failure to achieve complete resection (R0 or R1); or death from any cause.
|
From first dose up to 1 year
|
|
Overall Survival (OS)
Ramy czasowe: From first dose through end of study (approximately up to 52 weeks or longer if followed)
|
Overall survival is defined as the time from first dose of study treatment to death from any cause.
|
From first dose through end of study (approximately up to 52 weeks or longer if followed)
|
|
Pharmacokinetics of PRTX007
Ramy czasowe: During treatment period (multiple time points from baseline through approximately 9 weeks and selected later time points)
|
Plasma concentrations of PRTX007 and its active metabolite will be measured to characterize pharmacokinetic parameters using validated analytical methods.
|
During treatment period (multiple time points from baseline through approximately 9 weeks and selected later time points)
|
|
Changes in cytokine, chemokine and soluble PD-1/PD-L1 biomarkers
Ramy czasowe: Baseline through treatment period (up to approximately 9 weeks and selected later time points)
|
Baseline through treatment period (up to approximately 9 weeks and selected later time points)
|
|
|
Changes in mRNA expression
Ramy czasowe: Baseline through treatment period (up to approximately 9 weeks and selected later time points)
|
Baseline through treatment period (up to approximately 9 weeks and selected later time points)
|
|
|
Changes in immune cell activation and proliferation markers
Ramy czasowe: Baseline through treatment period (up to approximately 9 weeks and selected later time points)
|
Baseline through treatment period (up to approximately 9 weeks and selected later time points)
|
Współpracownicy i badacze
Sponsor
Sponsor
Daty zapisu na studia
Główne daty studiów
Rozpoczęcie studiów (Rzeczywisty)
Rozpoczęcie studiów
Zakończenie podstawowe (Szacowany)
Zakończenie podstawowe
Ukończenie studiów (Szacowany)
Ukończenie studiów
Daty rejestracji na studia
Pierwszy przesłany
Pierwszy przesłany
Pierwszy przesłany, który spełnia kryteria kontroli jakości
Pierwszy przesłany, który spełnia kryteria kontroli jakości
Pierwszy wysłany (Rzeczywisty)
Pierwszy wysłany
Aktualizacje rekordów badań
Ostatnia wysłana aktualizacja (Rzeczywisty)
Ostatnia wysłana aktualizacja
Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości
Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości
Ostatnia weryfikacja
Ostatnia weryfikacja
Więcej informacji
Terminy związane z tym badaniem
Dodatkowe istotne warunki MeSH
Inne numery identyfikacyjne badania
Inne numery identyfikacyjne badania
- PRTX007-003
Plan dla danych uczestnika indywidualnego (IPD)
Planujesz udostępniać dane poszczególnych uczestników (IPD)?
Opis planu IPD
Informacje o lekach i urządzeniach, dokumenty badawcze
Bada produkt leczniczy regulowany przez amerykańską FDA
Bada produkt urządzenia regulowany przez amerykańską FDA
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