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MRG003 Plus Toripalimab Versus Toripalimab as Neoadjuvant Therapy for PD-L1-Positive, Resectable, Locally Advanced Head and Neck Squamous Cell Carcinoma

4. srpna 2026 aktualizováno: Dongguan People's Hospital

MRG003 (Becotatug Vedotin) Plus Toripalimab Versus Toripalimab as Neoadjuvant Therapy for PD-L1-Positive, Resectable, Locally Advanced Head and Neck Squamous Cell Carcinoma: A Multicenter, Prospective, Randomized, Controlled Phase II Trial

This is a multicenter, prospective, randomized, controlled Phase II trial evaluating the safety and efficacy of MRG003 (Becotatug vedotin) combined with Toripalimab versus Toripalimab alone as neoadjuvant therapy for PD-L1-positive, resectable locally advanced head and neck squamous cell carcinoma. A total of 65 subjects are planned (43 experimental, 22 control). The experimental arm receives two cycles of MRG003 (Becotatug vedotin) 2.0 mg/kg intravenously on Day 1 followed by Toripalimab 240 mg intravenously on Day 1 every 3 weeks, while the control arm receives two cycles of Toripalimab 240 mg alone. After neoadjuvant therapy, both arms undergo radical surgery 3-4 weeks later, followed by risk-adapted adjuvant radiotherapy or chemoradiotherapy with concurrent Toripalimab (3 cycles) and then 12 cycles of adjuvant Toripalimab maintenance. The primary endpoint is the major pathological response rate.

Přehled studie

Postavení

Zatím nenabíráme

Podmínky

Intervence / Léčba

Detailní popis

This study builds upon the limitations of neoadjuvant immunotherapy monotherapy (e.g., KEYNOTE-689), which showed a low MPR rate (9.8% overall, 13.7% in CPS>10) and a 25.6% progression rate, by exploring the synergistic combination of the EGFR-targeting antibody-drug conjugate MRG (Becotatug vedotin) with the PD-1 inhibitor Toripalimab. Eligible patients are treatment-naïve, PD-L1 positive (CPS ≥1), stage III-IVA resectable non-oropharyngeal, HPV-negative oropharyngeal, or specific HPV-positive oropharyngeal HNSCC, ECOG PS 0-1, aged 18-70. In the neoadjuvant phase, the experimental group receives MRG (Becotatug vedotin) 2.0 mg/kg (based on actual body weight) intravenously without prophylactic premedication, followed by Toripalimab 240 mg intravenously over 30-60 minutes on Day 1 of each 3-week cycle for 2 cycles; infusion reactions are monitored for at least 120 minutes after the first dose and 60 minutes thereafter. Dose reduction of MRG (Becotatug vedotin) to 1.5 mg/kg is permitted for toxicity, with permanent discontinuation if intolerance persists; Toripalimab dose modification is not allowed. The control group receives Toripalimab 240 mg alone on the same schedule. Three to four weeks after Cycle 2 Day 1, both arms undergo radical tumor resection; surgery is performed even if radiological progression occurs during neoadjuvant therapy, provided surgical criteria are met. Postoperatively, patients are stratified by pathology: those with extranodal extension or positive/inadequate margins receive adjuvant chemoradiotherapy (cisplatin 100 mg/m² every 3 weeks for 3 cycles plus radiotherapy at 60-70 Gy depending on risk), while those without receive adjuvant radiotherapy alone (same doses). During adjuvant radiotherapy, both arms concurrently receive 3 cycles of Toripalimab 240 mg every 3 weeks. After completing radiotherapy, all patients receive 12 cycles of adjuvant Toripalimab 240 mg every 3 weeks as maintenance. Secondary endpoints include event-free survival, pathologic complete response rate, objective response rate, R0 resection rate, surgical down-staging rate, safety (CTCAE v6.0), and quality of life; exploratory endpoints include overall survival and biomarker analysis. The MPR rate is compared using the exact test, assuming 45% in the experimental arm versus approximately 9.8% in the historical control, with a one-sided alpha of 0.025, 80% power, and 10% dropout, yielding the required sample size of 65. The full analysis set is the primary analysis population.

Typ studie

Intervenční

Zápis (Odhadovaný)

65

Fáze

  • Fáze 2

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní kontakt

Studijní místa

    • Guangdong
      • Dongguan, Guangdong, Čína, 523059
        • The Tenth Affiliated Hospital of Southern Medical University (Dongguan People's Hospital)
        • Kontakt:

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

  • Dospělý
  • Starší dospělý

Přijímá zdravé dobrovolníky

Ne

Popis

  1. Histologically or cytologically confirmed head and neck squamous cell carcinoma (HNSCC), PD-L1 positive (CPS ≥ 1)
  2. Treatment-naïve, pathologically confirmed stage III-IVA resectable non-oropharyngeal HNSCC (oral cavity, larynx, hypopharynx) OR HPV-negative oropharyngeal SCC, OR HPV-positive stage III T4N0-2 resectable oropharyngeal cancer (AJCC 8th edition)
  3. No prior antitumor treatment (radiotherapy, chemotherapy, targeted therapy, or immunotherapy)
  4. Age 18 to 70 years
  5. ECOG performance status 0 or 1
  6. Adequate organ function within 14 days before first dose (no blood products or growth factors within 14 days):

    • ANC ≥ 1.0 × 10⁹/L, Hb ≥ 90 g/L, PLT ≥ 75 × 10⁹/L
    • ALT/AST ≤ 1.5 × ULN, total bilirubin ≤ 1.5 × ULN, ALP < 2.5 × ULN
    • CrCl ≥ 50 mL/min (Cockcroft-Gault)
    • APTT and INR ≤ 1.5 × ULN
  7. At least one measurable lesion per RECIST 1.1
  8. Life expectancy ≥ 12 weeks
  9. Female subjects of childbearing potential and male subjects with reproductive potential must use medically accepted contraception during treatment and for 3 months after last dose
  10. Voluntary signed informed consent, good compliance, willing to undergo follow-up

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Léčba
  • Přidělení: Randomizované
  • Intervenční model: Paralelní přiřazení
  • Maskování: Žádné (otevřený štítek)

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: MRG003 + Toripalimab
Participants receive 2 cycles of neoadjuvant combination therapy with toripalimab plus MRG003 (Becotatug vedotin). After the neoadjuvant phase, radical surgery is performed. Postoperative management follows the same risk-adapted criteria as the control arm: participants with ENE or positive/inadequate margins receive adjuvant chemoradiotherapy, while those without receive adjuvant radiotherapy alone. During adjuvant radiotherapy, participants receive 3 cycles of concurrent toripalimab. After radiotherapy, all participants receive 12 cycles of adjuvant toripalimab maintenance therapy.
Toripalimab 240 mg administered intravenously over 30-60 minutes on Day 1 of each 3-week cycle, followed immediately by MRG003 (Becotatug vedotin) 2.0 mg/kg (based on actual body weight) administered intravenously without prophylactic premedication. Neoadjuvant phase: 2 cycles of both drugs. Adjuvant toripalimab: 3 cycles concurrent with radiotherapy, then 12 cycles maintenance. For MRG003 (Becotatug vedotin), monitor infusion reactions for at least 120 minutes after first dose and at least 60 minutes after subsequent doses if tolerated. Dose reduction of MRG003 (Becotatug vedotin) to 1.5 mg/kg is permitted once for toxicity; permanent discontinuation if intolerance persists at reduced dose. Toripalimab dose remains fixed throughout; no dose modification is permitted.
Toripalimab 240 mg administered intravenously over 30-60 minutes on Day 1 of each 3-week cycle. Neoadjuvant phase: 2 cycles. Adjuvant phase (concurrent with radiotherapy): 3 cycles. Adjuvant maintenance (after radiotherapy): 12 cycles. No prophylactic premedication required. No dose modification of toripalimab is permitted.
Aktivní komparátor: Toripalimab Monotherapy
Participants receive 2 cycles of neoadjuvant toripalimab monotherapy. After the neoadjuvant phase, radical surgery is performed. Postoperative management is determined by pathology: participants with extranodal extension (ENE) or positive/inadequate margins receive adjuvant chemoradiotherapy (cisplatin 100 mg/m² every 3 weeks for 3 cycles plus radiotherapy at 60-70 Gy depending on risk), while those without receive adjuvant radiotherapy alone. During adjuvant radiotherapy, participants receive 3 cycles of concurrent toripalimab. After radiotherapy, all participants receive 12 cycles of adjuvant toripalimab maintenance therapy.
Toripalimab 240 mg administered intravenously over 30-60 minutes on Day 1 of each 3-week cycle. Neoadjuvant phase: 2 cycles. Adjuvant phase (concurrent with radiotherapy): 3 cycles. Adjuvant maintenance (after radiotherapy): 12 cycles. No prophylactic premedication required. No dose modification of toripalimab is permitted.

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Major Pathological Response (MPR) rate
Časové okno: At the time of surgical specimen evaluation (approximately 6-8 weeks after initiation of neoadjuvant therapy)
Proportion of patients with major pathological response, defined as ≤ 10% residual viable tumor in the primary tumor and all sampled lymph nodes after completion of neoadjuvant therapy.
At the time of surgical specimen evaluation (approximately 6-8 weeks after initiation of neoadjuvant therapy)

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Event-Free Survival (EFS)
Časové okno: From randomization up to approximately 36 months
Time from randomization to first documented radiographic progression, progression leading to inoperability, or death from any cause.
From randomization up to approximately 36 months
Pathologic Complete Response (pCR) Rate
Časové okno: At definitive surgery (approximately Week 6-8 after randomization)
Proportion of subjects with no residual viable tumor cells in the primary tumor bed or resected lymph nodes after neoadjuvant therapy.
At definitive surgery (approximately Week 6-8 after randomization)
Objective Response Rate (ORR) per RECIST 1.1
Časové okno: After completion of 2 cycles of neoadjuvant therapy (approximately Week 6)
Proportion of subjects achieving complete response (CR) or partial response (PR) according to RECIST 1.1 after 2 cycles of neoadjuvant therapy.
After completion of 2 cycles of neoadjuvant therapy (approximately Week 6)
Safety: Incidence of Adverse Events and Serious Adverse Events
Časové okno: From first dose of study drug through 90 days after last dose or 30 days after surgery, whichever occurs later
Incidence, severity, and relationship of adverse events (AEs) and serious adverse events (SAEs) graded by CTCAE v5.0.
From first dose of study drug through 90 days after last dose or 30 days after surgery, whichever occurs later
On-Time Surgery Rate
Časové okno: Within 49 days after Cycle 2 Day 1( (each cycle is 21 days))
Proportion of subjects who undergo radical surgery within 49 days after Cycle 2 Day 1 of neoadjuvant therapy.
Within 49 days after Cycle 2 Day 1( (each cycle is 21 days))
R0 Resection Rate
Časové okno: At definitive surgery (approximately Week 6-8 after randomization)
Proportion of subjects who achieve complete (microscopically margin-negative) resection at definitive surgery.
At definitive surgery (approximately Week 6-8 after randomization)

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Spolupracovníci

Vyšetřovatelé

  • Studijní židle: Zhigang Liu, MD, The Tenth Affiliated Hospital of Southern Medical University (Dongguan People's Hospital)

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Odhadovaný)

10. srpna 2026

Primární dokončení (Odhadovaný)

30. ledna 2029

Dokončení studie (Odhadovaný)

30. června 2029

Termíny zápisu do studia

První předloženo

23. června 2026

První předloženo, které splnilo kritéria kontroly kvality

28. června 2026

První zveřejněno (Aktuální)

30. června 2026

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

5. srpna 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

4. srpna 2026

Naposledy ověřeno

1. července 2026

Více informací

Termíny související s touto studií

Další identifikační čísla studie

  • IIT-2026-008

Plán pro data jednotlivých účastníků (IPD)

Plánujete sdílet data jednotlivých účastníků (IPD)?

NE

Popis plánu IPD

This study does not currently have a plan to share individual participant data. The research team will not provide access to the raw data set.

Informace o lécích a zařízeních, studijní dokumenty

Studuje lékový produkt regulovaný americkým FDA

Ne

Studuje produkt zařízení regulovaný americkým úřadem FDA

Ne

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