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Symbiotic-Lung-04: A Study to Learn About the Study Medicine Called PF-08634404 in Combination With Chemotherapy in Adult Participants With Extensive-Stage Small Cell Lung Cancer

NCT07226999 · Status: RECRUITING · Phase: PHASE2/PHASE3 · Type: INTERVENTIONAL · Enrollment: 550

Last updated 2026-04-20

No results posted yet for this study

Summary

This study is being done to learn more about a new medicine called PF-08634404 and how well it works when given with chemotherapy to adults with extensive-stage small cell lung cancer (ES-SCLC), a fast-growing type of lung cancer that has spread widely in the body.

To join the study, participants must meet the following conditions:

* Be 18 years or older.
* Have extensive-stage small cell lung cancer confirmed by lab tests.
* Have not received chemotherapy or radiation for this type of lung cancer.
* Be in good physical condition and have healthy organs based on medical tests.

The study has two parts:

* In the first part, researchers will check how safe the study medicine is and how well people tolerate it when given with chemotherapy.
* In the second part, they will compare study medicine plus chemotherapy to another approved treatment (atezolizumab plus chemotherapy) to see which works better.

Participants will receive the treatment through IV infusions (medicine given directly into a vein). The treatment will be given in repeated time periods called cycles. Some participants will continue receiving the study medicine alone after the initial treatment.

Conditions

  • Small Cell Lung Cancer (SCLC)

Interventions

DRUG

PF-08634404

Concentrate for solution for infusion

BIOLOGICAL

Atezolizumab

Injection for intravenous use

DRUG

Chemotherapy

Injection for intravenous use

Sponsors & Collaborators

Principal Investigators

  • Pfizer CT.gov Call Center · Pfizer

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-12-09
Primary Completion
2030-06-14
Completion
2034-03-11
FDA Drug
Yes

Countries

  • United States
  • Australia
  • France
  • Japan
  • Puerto Rico
  • Spain
  • Taiwan

Study Locations

More Related Trials

Entities

Drugs
Companies

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 NCT07226999 on ClinicalTrials.gov