Skip to content

Symbiotic-Lung-14: A Study to Learn About the Study Medicine Called PF08634404 in Combination With Chemotherapy in Adult Participants With Transformed Small Cell Lung Cancer

A PHASE 2 INTERVENTIONAL STUDY OF PF-08634404 IN COMBINATION WITH CHEMOTHERAPY IN PARTICIPANTS WITH PREVIOUSLY UNTREATED TRANSFORMED SMALL CELL LUNG CANCER

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2031260080
Enrollment
40
Registered
2026-04-23
Start date
2026-04-22
Completion date
Unknown
Last updated
2026-06-01

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

Conditions

Small Cell Lung Cancer

Interventions

*Drug: PF-08634404 -Concentrate for solution for infusion -Other Names: #SSGJ-707 *Drug: Chemotherapy -Injection for intravenous use

Sponsors

Kawai Norisuke
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Inclusion Criteria: *Male or female participants aged >=18 years at the time of informed consent. *Histologically or cytologically confirmed T-SCLC. Participant must have had a prior diagnosis of NSCLC with EGFR mutation which transformed to SCLC following the treatment with TKI(s). *Participants have not received systemic therapy for T-SCLC. *Have at least one measurable lesion as the target lesion based on RECIST v1.1. *Have sufficient tumor tissue from the diagnosis of transformed SCLC available. *Eastern Cooperative Oncology Group performance status of 0 or 1. *Have a minimum life expectancy of >12 weeks. *Clinical laboratory values at screening within acceptable limits, as defined in the protocol, including: 1) Hematology, 2) Liver function and 3) Renal function.

Exclusion criteria

Exclusion criteria: Exclusion Criteria: Participants are excluded from the study if any of the following criteria apply: *Active or untreated CNS disease, including brain, brainstem, spinal cord, or meningeal metastases. Participants with definitively treated, clinically stable brain metastases may be eligible per protocol criteria. Participants with untreated asymptomatic brain metastases of longest diameter 480 msec *Major surgery or severe trauma within 4 weeks prior to first dose, or planned major surgery during the study *Clinically significant pleural effusion, pericardial effusion, or ascites requiring repeated drainage *History of significant bleeding disorders or recent major bleeding events *Clinically significant gastrointestinal conditions, including recent perforation, fistula, obstruction, or active bleeding *Active, uncontrolled, or symptomatic infection, including: -Active TB -Active hepatitis B or C -Uncontrolled HIV infection *History of immunodeficiency *Severe hypersensitivity or allergic reactions to study intervention components or monoclonal antibodies *Psychiatric illness or medical condition, including recent suicidal ideation or behavior, that may increase risk or interfere with study participation *Prior anti-angiogenic therapy or other prohibited anti-tumor or immunomodulatory therapies per protocol-specified washout periods *Use of prohibited concomitant medications, including high-dose systemic corticosteroids, certain anticoagulants, or live vaccines within protocol-specified timeframes *Recent participation in another investigational study (within 30 days or 5 half-lives, whichever is longer) *Pregnant or breastfeeding participants, or unwillingness to comply with contraception requirements

Design outcomes

Primary

MeasureTime frame
*Confirmed Objective Response Rate (ORR) as assessed by investigator based on Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1) [Time Frame: From start of treatment until first documented CR or PR (approximately maximum up to 1 years)] -Defined as the proportion of participants in whom a confirmed complete response (CR) or partial response (PR) is observed as best overall response. ORR using RECIST v1.1 as assessed by investigator. *Number of Participants with Adverse Events (AEs) [Time Frame: Up to 90 days after the last dose of treatment] -Adverse Events (AEs) as characterized by type, frequency, severity (as graded by NCI CTCAE version 5.0), timing, seriousness, and relationship to study intervention.

Secondary

MeasureTime frame
*Duration of Response (DOR) as assessed by investigator based on RECIST v1.1 [Time Frame: Up to approximately 2 years after completion of study treatment of last study participant] -DOR is defined as the time from the first documentation of objective response (CR or PR) to the date of first documentation of disease progression (PD) or death due to any cause. *Progression Free Survival (PFS) as assessed by investigator based on RECIST v1.1 [Time Frame: Up to approximately 2 years after completion of study treatment of last study participant] -PFS is defined as the time from the date of randomization to the date of first documented disease progression, per RECIST v1.1, or death to any cause, whichever occurs first *Overall Survival (OS) [Time Frame: Up to approximately 2 years after completion of study treatment of last study participant] -OS is defined as the time from the date of randomization to the date of death due to any cause. OS is secondary outcome measure in Phase 2 portion of the study. *Number of participants with Laboratory abnormalities [Time Frame: Up to 90 days after the last dose of treatment] -Laboratory abnormalities as characterized by type, frequency, severity (as graded by NCI CTCAE version 5.0), and timing. *Pharmacokinetics: Predose and postdose Serum concentrations of PF-08634404 [Time Frame: Up to 37 days after the last dose of treatment] *Incidence of antidrug antibody against PF-08634404 [Time Frame: Up to 37 days after the last dose of treatment]

Countries

Japan, Will be provided

Contacts

Public ContactClinical Trials Information Desk

Pfizer R&D Japan G.K.

clinical-trials@pfizer.com+81-3-5309-7000

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jun 11, 2026