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A Multicenter, Randomized, Open-Label, Phase 3 Trial of Trastuzumab Deruxtecan (Enhertu®) Plus Chemotherapy Plus or Minus Pembrolizumab versus Chemotherapy Plus Trastuzumab Plus Or Minus Pembrolizumab as First-Line Treatment in Participants with Unresectable, Locally Advanced or Metastatic HER2-Positive Gastric or Gastroesophageal Junction (GEJ) Cancer (DESTINY-Gastric05)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-513122-27-00
Acronym
DS8201-724
Enrollment
214
Registered
2025-04-29
Start date
2025-06-10
Completion date
Unknown
Last updated
2025-11-07

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

Conditions

Unresectable, Locally Advanced or Metastatic HER2 positive Gastric or Gastroesophageal Junction Cancer

Brief summary

PFS is defined as the time interval from the date of randomization to the date of radiographic disease progression or death due to any cause.

Detailed description

OS is defined as the time interval from the date of randomization to the date of death due to any cause., Incidence of TEAEs, SAEs, AESIs, deaths, ECOG performance status, vital signs, clinical laboratory results, ECGs, and ECHO/MUGA results., ORR is defined as the proportion of participants with a BOR of confirmed CR or confirmed PR according to RECIST v1.1., PFS is defined as the time interval from the date of randomization to the date of disease progression or death due to any cause. Disease progression will be determined by investigators’ assessment of tumor scans according to RECIST v1.1., DoR is defined as the time from the date of first documentation of objective tumor response (CR or PR) for responding participants (CR or PR) only to the first documentation of objective tumor progression or death due to any cause., TTR is defined as the time from the date of randomization to the date of the first documentation of objective response (CR or PR). Time to response will be measured for responding participants (CR or PR) only., PFS2 is defined as the time from the date of randomization to the first documented progression on next-line therapy or death due to any cause., Serum concentrations of T-DXd, total anti-HER2-antibody, and DXd., The proportion of participants having treatment-emergent ADA. Titer and neutralizing antibodies will be determined when ADA is positive., Time to confirmed deterioration and change from baseline in the following measure: • FACT-GA subscale, Time to confirmed deterioration and change from baseline in the following measure: • FACT-GA Physical Well-being subscale, Time to confirmed deterioration and change from baseline in the following measure: • EQ-5D-5L VAS

Interventions

DRUGKEYTRUDA 25 mg/mL concentrate for solution for infusion
DRUGDS-8201a
DRUG5-Fluorouracil Ebewe 50 mg/ml concentrat pentru soluţie injectabilă/perfuzabilă
DRUGCAPECITABINE

Sponsors

Daiichi Sankyo Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
PFS is defined as the time interval from the date of randomization to the date of radiographic disease progression or death due to any cause.

Secondary

MeasureTime frame
OS is defined as the time interval from the date of randomization to the date of death due to any cause., Incidence of TEAEs, SAEs, AESIs, deaths, ECOG performance status, vital signs, clinical laboratory results, ECGs, and ECHO/MUGA results., ORR is defined as the proportion of participants with a BOR of confirmed CR or confirmed PR according to RECIST v1.1., PFS is defined as the time interval from the date of randomization to the date of disease progression or death due to any cause. Disease progression will be determined by investigators’ assessment of tumor scans according to RECIST v1.1., DoR is defined as the time from the date of first documentation of objective tumor response (CR or PR) for responding participants (CR or PR) only to the first documentation of objective tumor progression or death due to any cause., TTR is defined as the time from the date of randomization to the date of the first documentation of objective response (CR or PR). Time to response will be measured

Countries

Austria, Belgium, Czechia, France, Germany, Italy, Netherlands, Norway, Poland, Portugal, Romania, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026