Study of Durvalumab + Tremelimumab With Chemotherapy or Durvalumab With Chemotherapy or Chemotherapy Alone for Patients With Lung Cancer (POSEIDON).

NCT03164616 · Status: ACTIVE_NOT_RECRUITING · Phase: PHASE3 · Type: INTERVENTIONAL · Enrollment: 1186

Last updated 2026-03-13

Study results available
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Summary

This is a randomized, open-label, multi-center, global, Phase III study to determine the efficacy and safety of durvalumab + tremelimumab combination therapy + Standard of care (SoC) chemotherapy or durvalumab monotherapy + SoC chemotherapy versus SoC chemotherapy alone as first line treatment in patients with metastatic non small-cell lung cancer (NSCLC) with tumors that lack activating epidermal growth factor receptor (EGFR) mutations and anaplastic lymphoma kinase (ALK) fusions.

Conditions

  • Non Small Cell Lung Cancer NSCLC

Interventions

DRUG

Durvalumab

IV infusions every 3 weeks for 12 weeks (4 cycles) and every 4 weeks thereafter until disease progression or other discontinuation criteria

DRUG

Tremelimumab

IV infusions every 3 weeks for 12 weeks (4 cycles). An additional dose of tremelimumab will be administered in the week 16.

DRUG

Abraxane + carboplatin

Standard of care chemotherapy (squamous and non-squamous patients): Abraxane 100 mg/m2 on Days 1, 8, and 15 of each 21-day cycle. Carboplatin Area under the plasma drug concentration-time curve (AUC) 5 or 6 via IV infusion on Day 1 of each 21-day cycle for 4 to 6 cycles (ie, 4 cycles for Treatment Arms 1 and 2 and 4 to 6 cycles for Treatment Arm 3).

DRUG

Gemcitabine + cisplatin

Standard of care chemotherapy (squamous patients only): Gemcitabine 1000 or 1250 mg/m2 via IV infusion on Days 1 and 8 of each 21-day cycle + cisplatin 75 mg/m2 via IV infusion on Day 1 of each 21-day cycle, for 4 to 6 cycles (ie, 4 cycles for Treatment Arms 1 and 2 and 4 to 6 cycles for Treatment Arm 3).

DRUG

Gemcitabine + carboplatin

Standard of care chemotherapy (squamous patients only): Gemcitabine 1000 or 1250 mg/m2 via IV infusion on Days 1 and 8 of each 21-day cycle + carboplatin AUC 5 or 6 via IV infusion on Day 1 of each 21-day cycle for 4 to 6 cycles (ie, 4 cycles for Treatment Arms 1 and 2 and 4 to 6 cycles for Treatment Arm 3).

DRUG

Pemetrexed + carboplatin

Standard of care chemotherapy (non-squamous patients only): Pemetrexed 500 mg/m2 and carboplatin AUC 5 or 6 via IV infusion on Day 1 of each 21-day cycle for 4 to 6 cycles (ie, 4 cycles for Treatment Arms 1 and 2 and 4 to 6 cycles for Treatment Arm 3); then continue pemetrexed 500 mg/m2 maintenance \[i.e., q4w for Treatment Arms 1 and 2. For Treatment Arm 3, Pemetrexed maintenance therapy can be given either q3w or q4w (dependent on Investigator decision and local standards)\] until objective disease progression.

DRUG

Pemetrexed + cisplatin

Standard of care chemotherapy (non-squamous patients only): Pemetrexed 500 mg/m2 and cisplatin 75 mg/m2 via IV infusion on Day 1 of each 21-day cycle, for 4 to 6 cycles (ie, 4 cycles for Treatment Arms 1 and 2 and 4 to 6 cycles for Treatment Arm 3); then continue pemetrexed 500 mg/m2 maintenance \[i.e., q4w for Treatment Arms 1 and 2. For Treatment Arm 3, Pemetrexed maintenance therapy can be given either q3w or q4w (dependent on Investigator decision and local standards)\] until objective disease progression.

Sponsors & Collaborators

Principal Investigators

  • Xiaojin Shi, M.D., MSc · One MedImmune Way, Gaithersburg, Maryland 20878, United States

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
130 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2017-06-01
Primary Completion
2021-03-12
Completion
2027-11-15
FDA Drug
Yes

Countries

  • United States
  • Brazil
  • Bulgaria
  • China
  • Germany
  • Hong Kong
  • Hungary
  • Japan
  • Mexico
  • Peru
  • Poland
  • Russia
  • South Africa
  • South Korea
  • Taiwan
  • Thailand
  • Ukraine
  • United Kingdom
  • Vietnam

Study Locations

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Entities

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03164616 on ClinicalTrials.gov