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A Randomized, Controlled, Double-Blind, Multicenter Phase III Clinical Trial to Evaluate the Efficacy and Safety of Enlonstobart, With or Without SYS6010 as Adjuvant Therapy, in Participants With Pathologically Residual Esophageal Squamous Cell Carcinoma Following Complete Surgical Resection

2 november 2026 bijgewerkt door: CSPC Megalith Biopharmaceutical Co.,Ltd.

This is a randomized, controlled, double-blind, multicenter phase iii clinical trial to evaluate the efficacy and safety of enlonstobart, with or without SYS6010 as adjuvant therapy, in participants with pathologically residual esophageal squamous cell carcinoma following complete surgical resection.

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

This study is a randomized, double-blind, three-arm, placebo-controlled, multicenter Phase III trial designed to evaluate the efficacy and safety of SG001, with or without SYS6010, compared to placebo as adjuvant therapy following radical surgery with R0 resection but with pathological residual disease (ypT1-4aN0M0 or ypT0-4aN+M0) in patients with resectable Stage II -III esophageal squamous cell carcinoma who achieved R0 resection following curative surgery after neoadjuvant therap.

The study plans to enroll 585 participants who have previously undergone curative surgery for esophageal cancer, with R0 resection at surgery, pathologically confirmed failure to achieve pCR, and who have signed an informed consent form. Participants will be randomly assigned in a 2:2:1 ratio to the following groups in a double-blind manner: SG001 + SYS6010 vs. SG001 + placebo-mimicking SYS6010 vs. SG001 placebo-mimicking + placebo-mimicking SYS6010.

Studietype

Ingrijpend

Inschrijving (Geschat)

585

Fase

  • Fase 3

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

  • Naam: Clinical Trials Information Group officer
  • Telefoonnummer: 031169085587
  • E-mail: ctr-contact@cspc.cn

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

18 jaar en ouder (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  1. Be able to understand and voluntarily sign the written ICF;

  2. Age over 18 years, male or female;

  3. With histologically/cytologically confirmed esophageal squamous cell carcinoma that is clinically staged as stage II-III , neoadjuvant therapy must be completed prior to randomization, followed by curative surgery for esophageal squamous cell carcinoma, and all of the following criteria must be met:

    Neoadjuvant therapy includes: at least 2 cycles of platinum-based chemotherapy (± immune checkpoint inhibitors) or chemoradiotherapy, with no clinically or radiologically confirmed disease progression during the neoadjuvant therapy phase.

    Participants must have achieved R0 complete resection, with the surgery resulting in a tumor-free state and negative surgical margins.

    Prior to randomization, the Center's Independent Pathology Review Committee (CPIRC) will evaluate the participant's postoperative pathology report (pathology report must be provided). Participants who do not achieve pathological complete response (non-pCR) and have pathological residual disease (ypT1-4aN0M0 or ypT0-4aN+M0) will have their pathology results assessed and confirmed by the Center's Independent Pathology Review Committee in cases of uncertain pathology (e.g., ypNx).

    Postoperative adjuvant therapy must begin 4-16 weeks after curative surgery.;

  4. Eastern Cooperative Oncology Group (ECOG) performance status score: 0-1;

  5. Life expectancy ≥ 3 months;

Exclusion Criteria:

  1. Pathologically diagnosed esophageal carcinoma, including adenocarcinoma, adenosquamous carcinoma, or other histological subtypes;
  2. Previous treatment with irinotecan-based agents or topoisomerase I inhibitor-based toxin-conjugated antibody (ADC) drugs; For patients who have received treatment with immune checkpoint inhibitors (e.g., anti-PD-1/PD-L1 monoclonal antibodies) during the neoadjuvant phase: a history of Grade ≥3 immune-related adverse events (irAEs), or a history of irAEs leading to permanent discontinuation of immunotherapy, or a history of immune-related interstitial pneumonia, myocarditis, encephalitis, or severe neurological toxicity of any grade;
  3. Patients who have received other anticancer therapies following curative surgery for esophageal squamous cell carcinoma, including chemotherapy, targeted therapy, radiation therapy, biologic therapy, immunotherapy, or treatment with traditional Chinese medicine products approved for such indications; Patients with a known allergy to any component of the SYS6010 product or to humanized monoclonal antibody products;
  4. BMI < 16.0 kg/m² or body weight < 40 kg;

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: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Verviervoudigen

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: SG001 + SYS6010

SYS6010 is an antibody conjugate drug (ADC), composed of one anti-EGFR monoclonal antibody coupled to one JS1 via an enzyme specific linker.

SG001 is a recombinant, fully human, anti-PD-1 monoclonal antibody.

Experimenteel: SG001 + placebo-mimicking SYS6010

SG001 is a recombinant, fully human, anti-PD-1 monoclonal antibody.

SYS6010 placebo-mimicking is a placebo mimicking of SYS6010

Placebo-vergelijker: SG001 placebo-mimicking + placebo-mimicking SYS6010

SYS6010 placebo-mimicking is a placebo mimicking of SYS6010

SG001 placebo-mimicking is a placebo mimicking of SG001

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
DFS
Tijdsspanne: From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 60 months

Disease Free Surviva Arm1 vs Arm3 Arm2 vs Arm3

From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 60 months

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
OS :Description: Overall survival
Tijdsspanne: From date of randomization until the date of death from any cause, assessed up to 60 months.

Overall survival

From date of randomization until the date of death from any cause, assessed up to 60 months.
DMFS
Tijdsspanne: From date of randomization until the date of first documented distant recurrence/distant metastasis or date of death from any cause, whichever came first, assessed up to 60 months.

Distant Metastasis-Free Survival

From date of randomization until the date of first documented distant recurrence/distant metastasis or date of death from any cause, whichever came first, assessed up to 60 months.
Serum concentrations of toxin-bound antibodies for SYS6010
Tijdsspanne: From first dose of treatment to 30 days after the last dose of treatment.

Serum concentrations of toxin-bound antibodies following single and multiple doses of SYS6010

From first dose of treatment to 30 days after the last dose of treatment.
Plasma concentration of SG001 following single and multiple doses of SG001
Tijdsspanne: From first dose of treatment to 30 days after the last dose of treatment.

Plasma concentration of SG001 following single and multiple doses of SG001

From first dose of treatment to 30 days after the last dose of treatment.
Quality of life indicators assessed using the EORTC QLQ-C30;
Tijdsspanne: Evaluated during the screening period (Day -28 to Day 1),during the treatment period (at each tumor assessment), and at the End of Treatment visit.
Evaluated during the screening period (Day -28 to Day 1),during the treatment period (at each tumor assessment), and at the End of Treatment visit.
mmunogenicity: incidence and titers of ADA for SYS6010 and SG001, incidence of neutralizing antibodies (if applicable).
Tijdsspanne: From first dose of treatment to 30 days after the last dose of treatment.
From first dose of treatment to 30 days after the last dose of treatment.
AE
Tijdsspanne: From first dose of treatment to 90 days after the last dose of treatment.

Incidence and severity of adverse events

From first dose of treatment to 90 days after the last dose of treatment.
Serum concentrations of total antibodies for SYS6010;
Tijdsspanne: From first dose of treatment to 30 days after the last dose of treatment.

Serum concentrations of total antibodies following single and multiple doses of SYS6010.

From first dose of treatment to 30 days after the last dose of treatment.
Plasma concentration of SG001 following single and multiple doses of SG001;
Tijdsspanne: From first dose of treatment to 30 days after the last dose of treatment.

Serum concentrations of JS-1 following single and multiple doses of SYS6010.

From first dose of treatment to 30 days after the last dose of treatment.

Medewerkers en onderzoekers

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

Sponsor

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 december 2026

Primaire voltooiing (Geschat)

30 december 2029

Studie voltooiing (Geschat)

30 december 2030

Studieregistratiedata

Eerst ingediend

26 oktober 2026

Eerst ingediend dat voldeed aan de QC-criteria

2 november 2026

Eerst geplaatst (Werkelijk)

9 november 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

9 november 2026

Laatste update ingediend die voldeed aan QC-criteria

2 november 2026

Laatst geverifieerd

1 november 2026

Meer informatie

Termen gerelateerd aan deze studie

Andere studie-ID-nummers

  • SYS6010-027

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

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