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Sintilimab or Placebo With Chemotherapy in Esophageal Squamous Cell Carcinoma ( ORIENT-15 )

A Multicenter, Double-Blind, Randomized Phase 3 Clinical Trial Evaluating the Efficacy and Safety of Sintilimab vs. Placebo, in Combination With Chemotherapy, for First-Line Treatment of Unresectable, Locally Advanced, Recurrent, or Metastatic Esophageal Squamous Cell Carcinoma (ORIENT-15)

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03748134
Enrollment
746
Registered
2018-11-20
Start date
2018-12-24
Completion date
2023-07-29
Last updated
2023-10-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Esophageal Squamous Cell Carcinoma

Keywords

ESCC, Esophageal Cancer, Esophageal Neoplasms, Esophageal Neoplasms Malignant, Esophageal Squamous Cell Carcinoma, Neoplasms, Squamous Cell, Esophageal Diseases, Carcinoma, Squamous Cell, Gastrointestinal Diseases, Paclitaxel, Cisplatin, Fluorouracil, Antineoplastic Agents, Anti-PD-1, Sintilimab

Brief summary

This is a randomized, double-blind multi-center, phase III study comparing the efficacy and safety of sintilimab or placebo in combination with chemotherapy as first-line treatment in subjects with unresectable, locally advanced recurrent or metastatic esophageal squamous cell carcinoma. After the interim analysis conducted by the iDMC, an open-label assignment of experimental arm therapy will continue in regions outside of China, in order to further evaluate the efficacy and safety of sintilimab in combination with chemotherapy in subjects representing the western population with advanced esophageal squamous cell carcinoma

Interventions

BIOLOGICALSintilimab

For weight \<60kg, 3mg/kg IV Q3W day 1, and for weight≥60kg, 200mg IV Q3W day 1

DRUGCisplatin

75mg/m\^2 IV Q3W day 1

DRUGPaclitaxel

87.5 mg/m\^2 IV Q3W day 1, day 8 for first cycle and 175mg/m\^2 IV Q3W day 1 after first cycle

DRUGFluorouracil

800 mg/m\^2 IV continuous infusion over 24 hours daily on Days 1-5 Q3W

DRUGPlacebo

For weight \<60kg, 3mg/kg IV Q3W day 1, and for weight≥60kg, 200mg IV Q3W day 1

Sponsors

Fortrea
CollaboratorINDUSTRY
Innovent Biologics (Suzhou) Co. Ltd.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria: * Histopathologically confirmed unresectable, locally advanced, recurrent or metastatic ESCC (excluding mixed adenosquamous carcinoma and other histological subtypes) * ECOG PS of 0 or 1 * Subject must be unsuitable for definitive treatment, such as definitive chemoradiotherapy and/or surgery. For subjects who have received (neo)adjuvant or definitive chemotherapy/radiochemotherapy, time from the completion of last treatment to disease recurrence must be \> 6 months Could provide archival or fresh tissues for PD-L1 expression analysis with obtainable results * Have at least one measurable lesion as per RECIST v1.1 Key

Exclusion criteria

* ESCC with endoscopy-confirmed near-complete obstruction requiring interventional therapy * Post stent implantation in the esophagus or trachea with risk of perforation * Received systemic treatment for advanced or metastatic ESCC. * Received a cumulative dose of cisplatin ≥ 300 mg/m2 and the last cisplatin dose was within 12 months of randomization or the first dose of study treatment in the open-label phase. * High risk of hemorrhage or perforations due to tumor invasion in adjacent organs (aorta or trachea), or have fistula formation. * Hepatic metastasis \> 50% of the total liver volume. * Received palliative therapy for a local lesion within 2 weeks prior to the first dose. * Received systemic treatment with Chinese traditional medicines with anti-cancer indications or immunomodulators (including thymosins, interferons, and interleukins) within 2 weeks prior to the first dose of study treatment. * Received systemic immunosuppressants within 2 weeks prior to randomization, excluding local use of glucocorticoids administered by nasal, inhaled, or other routes, and systemic glucocorticoids at physiological doses (no more than 10 mg/day of prednisone or equivalents), or glucocorticoids to prevent allergies to contrast media.

Design outcomes

Primary

MeasureTime frameDescription
OS in overall populationFrom date of randomization until the date of death from any cause, assessed up to 40 months.To compare the overall survival of sintilimab vs. placebo, in combination with chemotherapy, for first-line treatment in subjects with unresectable, locally advanced, recurrent or metastatic esophageal squamous cell carcinoma (ESCC)
OS in PD-L1 positive populationFrom date of randomization until the date of death from any cause, assessed up to 40 months.To compare the OS of sintilimab vs. placebo, in combination with chemotherapy, for first-line treatment in subjects with PD-L1 positive, unresectable, locally advanced, recurrent or metastatic ESCC

Secondary

MeasureTime frameDescription
DCR in overall populationFrom date of randomization up to 28 monthsTo compare the disease control rate between the two treatment arms in ITT population
DoR in overall populationFrom date of randomization up to 28 monthsTo compare the duration of response between the two treatment arms in ITT population
ORR - PD-L1 positiveFrom date of randomization up to 28 monthsTo compare the objective response rate between the two treatment arms in PD-L1 positive subjects in ITT population
ORR in overall populationFrom date of randomization up to 28 months.To compare the objective response rate between the two treatment arms in ITT population
DoR - PD-L1 positiveFrom date of randomization up to 28 monthsTo compare the duration of response between the two treatment arms in PD-L1 positive subjects in ITT population
PFS - PD-L1 positiveFrom date of randomization up to 28 monthsTo compare the progression-free survival between the two treatment arms in PD-L1 positive subjects in ITT population
DCR - PD-L1 positiveFrom date of randomization up to 28 monthsTo compare the disease control rate between the two treatment arms in PD-L1 positive subjects in ITT population
PFS in overall populationsubjects in ITT populationFrom date of randomization up to 28 monthsTo compare the progression-free survival between the two treatment arms in ITT population

Countries

Australia, Belgium, China, France, Hungary, Spain, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 21, 2026