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.
調査の概要
状態
状態
条件
条件
介入・治療
介入・治療
詳細な説明
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
研究の種類
研究の種類
入学 (推定)
入学
段階
段階
- フェーズ2
連絡先と場所
研究連絡先
研究連絡先
- 名前:Gunjan Mody
- 電話番号:+61 2 9199 9596
- メール:gunjan.mody@novotech-cro.com
研究場所
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New South Wales
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Waratah、New South Wales、オーストラリア、2298
- 募集
- Calvary Mater Newcastle
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Queensland
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Cairns、Queensland、オーストラリア、4870
- まだ募集していません
- Cairns And Hinterland Hospital And Health Service
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Greenslopes、Queensland、オーストラリア、4120
- まだ募集していません
- Gallipoli Medical Research
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Woolloongabba、Queensland、オーストラリア、4102
- まだ募集していません
- Princess Alexandra Hospital
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Victoria
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Melbourne、Victoria、オーストラリア、3000
- まだ募集していません
- Peter MacCallum Cancer Centre
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Western Australia
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Nedlands、Western Australia、オーストラリア、6009
- まだ募集していません
- Sir Charles Gairdner Hospital
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Nedlands、Western Australia、オーストラリア、6009
- 募集
- One Clinical Research Pty Ltd
-
-
参加基準
適格基準
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
説明
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
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:処理
- 割り当て:なし
- 介入モデル:単一グループの割り当て
- マスキング:なし(オープンラベル)
アーム数
武器と介入
参加者グループ / アーム参加者グループ / アーム |
介入・治療介入・治療 |
|---|---|
|
実験的: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
|
この研究は何を測定していますか?
主要な結果の測定
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Major Pathologic Response (MPR) Rate
時間枠: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)
|
二次結果の測定
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Incidence of Adverse Events (AEs), Serious Adverse Events (SAEs), Immune-Related AEs (irAEs), and Dose-Limiting Toxicities (DLTs)
時間枠: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
時間枠:Baseline through end of study (approximately up to 52 weeks)
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Baseline through end of study (approximately up to 52 weeks)
|
|
|
Pathologic Complete Response (pCR) Rate
時間枠: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)
時間枠: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)
時間枠: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)
|
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Pharmacokinetics of PRTX007
時間枠: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)
|
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Changes in cytokine, chemokine and soluble PD-1/PD-L1 biomarkers
時間枠: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)
|
|
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Changes in mRNA expression
時間枠:Baseline through treatment period (up to approximately 9 weeks and selected later time points)
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Baseline through treatment period (up to approximately 9 weeks and selected later time points)
|
|
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Changes in immune cell activation and proliferation markers
時間枠: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)
|
協力者と研究者
研究記録日
主要日程の研究
研究開始 (実際)
研究開始
一次修了 (推定)
一次修了
研究の完了 (推定)
研究の完了
試験登録日
最初に提出
最初に提出
QC基準を満たした最初の提出物
QC基準を満たした最初の提出物
最初の投稿 (実際)
最初の投稿
学習記録の更新
投稿された最後の更新 (実際)
投稿された最後の更新
QC基準を満たした最後の更新が送信されました
QC基準を満たした最後の更新が送信されました
最終確認日
最終確認日
詳しくは
本研究に関する用語
追加の関連 MeSH 用語
その他の研究ID番号
その他の研究ID番号
- PRTX007-003
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
IPD プランの説明
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
米国FDA規制機器製品の研究
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