AzTrials
AzTrials

NeoplasmsPhase 1NCT06285097

A Study of PF-07820435 as a Single Agent and in Combination in Participants With Advanced Solid Tumors

A Phase 1 study testing PF-07820435 and Sasanlimab in people with Neoplasms and Non-small-cell Lung Cancer, run by Pfizer at 10 sites in 3 countries.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
Search all trials

Trial summary

This study aims to evaluate the safety, and early signals of anti-tumor activity of PF-07820435 when administered alone (Part 1A) or in combination with sasanlimab (Part 1B; Part 2) in patients with selected advanced or metastatic solid tumors. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Neoplasms, Non-small-cell Lung Cancer, Melanoma
What is being tested?
PF-07820435 and Sasanlimab
Could I receive a placebo?
No, everyone receives an active treatment
How many people
9 participants
Where
10 sitesin 3 countries
Study dates
8 Feb 2024to 13 Feb 2025
Phase
Phase 1
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Histological or cytological diagnosis of advanced, unresectable, and/or metastatic or relapsed/refractory solid tumor
  • Part 1A: Participants with solid tumors where anti-PD-(L)1 is an established treatment. Participants must have progressed on or following prior anti-PD-(L)1 therapy if approved, available, tolerable, and eligible
  • Part 1B: Participants either meeting Part 1A criterion, or participants with "cold" solid tumors where anti-PD-(L)1 therapy is not an established treatment
  • Part 2: Participants with NSCLC (Arm A) must have received platinum-based chemotherapy and anti-PD-(L)1 or have intolerability to or refusal of standard therapies. NSCLC participants with known activating mutation(s) must also have received prior approved and available targeted therapy(ies) for the associated mutation(s) or have intolerability or documented refusal of these therapies. Participants with UC (Arm B) must have received prior platinum-based chemotherapy, anti-PD-(L)1 therapy, or enfortumab vedotin, or have documented intolerability or refusal of the standard therapy(ies). Additional cohort indication(s) or dose regimens may be added and defined based on emerging data
  • At least 1 measurable lesion based on RECIST 1.1 that has not been previously irradiated (Part 1 exceptions permitted after review and approval)
  • Able to provide pre-treatment (and optional on-treatment) tumor tissue

Who cannot join

  • Active or history of clinically significant gastrointestinal disease and other conditions that are unresolved or pose a risk to study treatment or procedures
  • Active or history of pneumonitis/interstitial lung disease, pulmonary fibrosis requiring treatment with systemic steroid therapy
  • Active or history of clinically significant autoimmune disease or other medical condition that required chronic systemic immunosuppressive therapy within recent 2 years
  • History of severe immune-mediated adverse event or cytokine release syndrome that was considered related to prior immune modulatory therapy that required immunosuppressive therapy

Trial locations and contacts

10 sites in 3 countries.

10 sites in 3 countries

United States6 sites
  • Corewell Health (reference non-engagement letter)

    Grand Rapids, Michigan, 49503

  • START Midwest

    Grand Rapids, Michigan, 49546

  • Sarah Cannon Research Institute - Pharmacy

    Nashville, Tennessee, 37203

  • SCRI Oncology Partners

    Nashville, Tennessee, 37203

  • Tristar Centennial Medical Center

    Nashville, Tennessee, 37203

  • Florida Cancer Specialists Sarasota Drug Development Unit

    Sarasota, Florida, 34232

Other trials in United States

Japan2 sites
  • National Cancer Center Hospital East

    Kashiwa, Chiba, 277-8577

  • The Cancer Institute Hospital of JFCR

    Koto, Tokyo, 135-8550

Other trials in Japan

Puerto Rico2 sites
  • Hospital Oncologico Dr. Isaac Gonzalez-Martinez

    Rio Piedras, 00935

  • Pan American Center for Oncology Trials, LLC

    Rio Piedras, 00935

Other trials in Puerto Rico

About this study

Official title: A PHASE 1 DOSE ESCALATION AND EXPANSION STUDY TO EVALUATE SAFETY, TOLERABILITY, PHARMACOKINETIC, PHARMACODYNAMIC, AND ANTITUMOR ACTIVITY OF PF-07820435 AS MONOTHERAPY AND IN COMBINATION IN PARTICIPANTS WITH ADVANCED SOLID TUMORS

This study aims to evaluate the safety, and early signals of anti-tumor activity of PF-07820435 when administered alone (Part 1A) or in combination with sasanlimab (Part 1B; Part 2) in patients with selected advanced or metastatic solid tumors. Part 1 will be dose-finding and Part 2 of the study will further evaluate PF-07820435 at the recommended dose for combination expansion in patients with selected advanced solid tumors.

Being tested
PF-07820435, Sasanlimab
Keywords
Sasanlimab, anti-Programmed death receptor-1 (PD-1), solid tumor, immunotherapy
Medical subject headings
Neoplasms, Carcinoma, Non-Small-Cell Lung, Melanoma, Squamous Cell Carcinoma of Head and Neck, Carcinoma, Renal Cell, Carcinoma, Transitional Cell, Colorectal Neoplasms, Ovarian Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • PF-07820435Drug

    immune agonist

  • SasanlimabBiological

    A monoclonal antibody that blocks the interaction between PD-1 and PD-L1/L2

Study groups in NCT06285097
Study groupRoleWhat they receive
Monotherapy dose escalation (Part 1A)ExperimentalParticipants will receive PF-07820435 orally at the prescribed dose and frequency in 28-day cycles
Receives: Drug: PF-07820435
Combination dose escalation (Part 1B)ExperimentalParticipants will receive PF-07820435 orally at the prescribed dose and frequency, in combination with sasanlimab (subcutaneous injection) at a fixed dose once every 4 weeks in 28-day cycles
Receives: Drug: PF-07820435; Biological: Sasanlimab
Expansion (Part 2) - Tumor specific Arm AExperimentalParticipants will receive PF-07820435 orally at the prescribed dose and frequency in combination with sasanlimab SC once every 4 weeks in 28-day cycles
Receives: Drug: PF-07820435; Biological: Sasanlimab
Expansion (Part 2) - Tumor specific Arm BExperimentalParticipants will receive PF-07820435 orally at the prescribed dose and frequency in combination with sasanlimab SC once every 4 weeks in 28-day cycles
Receives: Drug: PF-07820435; Biological: Sasanlimab
Expansion (Part 2) - Arm CExperimentalParticipants will receive PF-07820435 orally at the prescribed dose and frequency in 28-day cycles
Receives: Drug: PF-07820435

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of patients with dose limiting toxicities (DLTs) in dose escalation (Part 1A and Part 1B)

    DLT rate estimated based on data from DLT-evaluable participants during the DLT evaluation period

    Measured: Baseline through 28 days after first dose

  2. Number of patients with adverse events (AEs)

    Characterized by type, frequency, severity (CTCAE v5; CRS by ASTCT), timing, seriousness, and relationship to study drug(s)

    Measured: Baseline through up to 2 years

  3. Number of patients with clinically significant lab abnormalities

    Characterized by type, frequency, severity (CTCAE v5), and timing

    Measured: Baseline through up to 2 years

  4. Objective response rate (ORR) in Part 2 Expansion

    Tumor response as assessed using RECIST 1.1

    Measured: Baseline through 2 years or disease progression

Secondary outcomes (13)
  1. Objective response rate (ORR) in dose escalation (Part 1A and Part 1B)

    Tumor response as assessed by RECIST 1.1

    Measured: Baseline through 2 years or disease progression

  2. Duration of tumor response

    Tumor response as assessed by RECIST 1.1

    Measured: Baseline through 2 years or disease progression

  3. Progression free survival (PFS)

    Tumor response as assessed by RECIST 1.1

    Measured: Baseline through 2 years or disease progression

  4. Cmax (maximum concentration) of PF-07820435 and its active metabolite

    Single and multiple dose PK parameters of PF-07820435 and its active metabolite

    Measured: Serial timepoints following the first dose (Day 1), second dose (Day 8), and third dose (Day 15) of the first cycle (each cycle is 28 days); and Day 1 (dosing) of Cycle 2 and Day 1 (dosing) of Cycle 3.

  5. Tmax (time to maximal plasma concentration) of PF-07820435 and its active metabolite

    Single and multiple dose PK parameters of PF-07820435 and its active metabolite

    Measured: Serial timepoints following the first dose (Day 1), second dose (Day 8), and third dose (Day 15) of the first cycle (each cycle is 28 days); and Day 1 (dosing) of Cycle 2 and Day 1 (dosing) of Cycle 3.

  6. AUClast (area under the curve from time 0 to the last measurable timepoint) of PF-07820435 and its active metabolite

    Single and multiple dose PK parameters of PF-07820435 and its active metabolite

    Measured: Serial timepoints following the first dose (Day 1), second dose (Day 8), and third dose (Day 15) of the first cycle (each cycle is 28 days); and Day 1 (dosing) of Cycle 2 and Day 1 (dosing) of Cycle 3.

  7. Cmin (minimum concentration) of PF-07820435 and its active metabolite after multiple dosing only

    Multiple dose PK parameters of PF-07820435 and its active metabolite

    Measured: Serial timepoints following the first dose (Day 1), second dose (Day 8), and third dose (Day 15) of the first cycle (each cycle is 28 days); and Day 1 (dosing) of Cycle 2 and Day 1 (dosing) of Cycle 3.

  8. Change from baseline of immune markers within biopsied tumor tissue

    Change in CD8 immune marker will be analyzed

    Measured: Baseline through about 6 weeks after first dose

  9. Pre-dose trough concentrations of sasanlimab (Part 1B and Part 2)

    Single and multiple dose PK parameters of sasanlimab

    Measured: Day 1 (pre-dose) of each cycle (28 days) for the first 3 cycles, then Day 1 on every 3rd cycle until 2 years or disease progression

  10. Incidence and titers of ADA and NAb against sasanlimab (Part 1B and Part 2)

    Immunogenicity assessment

    Measured: Day 1 (pre-dose) of each cycle (28 days) for the first 3 cycles, then Day 1 on every 3rd cycle until 2 years or disease progression

  11. Cmax of PF-07820435 and its active metabolite under fasted and fed conditions (Part 2 subset) subset of participants in Part 2

    The analysis applies to Part 2 Food Effect Subset only

    Measured: On Day 1 (first dose) and Day 15 (third dose): Pre-dose, 0.5 hour (h), 1h, 2h, 4h, 6h, and 24h post dose.

  12. Tmax of PF-07820435 and its active metabolite under fasted and fed conditions (Part 2 subset) subset of participants in Part 2

    The analysis applies to Part 2 Food Effect Subset only

    Measured: On Day 1 (first dose) and Day 15 (third dose): Pre-dose, 0.5 hour (h), 1h, 2h, 4h, 6h, and 24h post dose.

  13. AUC of PF-07820435 and its active metabolite under fasted and fed conditions (Part 2 subset) subset of participants in Part 2

    The analysis applies to Part 2 Food Effect Subset only

    Measured: On Day 1 (first dose) and Day 15 (third dose): Pre-dose, 0.5 hour (h), 1h, 2h, 4h, 6h, and 24h post dose.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted29 Feb 2024
  2. Study start8 Feb 2024
  3. Primary completion3 Jan 2025
  4. Study completion13 Feb 2025

Why it stopped: The trial was terminated for strategic business reasons; the decision was not based on any safety and/or efficacy concerns.

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Sequential
Masking
None (open label)
Enrolment
9 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06285097
Sponsor's protocol ID
C5391001
Other IDs
NCT06285097
Status last verified
Sep 2025
First submitted
23 Jan 2024
Last updated
17 Sep 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No: Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical\_trials/trial\_data\_and\_results/data\_requests.

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing PF-07820435 and Sasanlimab in people with Neoplasms and Non-small-cell Lung Cancer, run by Pfizer at 10 sites in 3 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 17 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 10 sites in United States, Japan, Puerto Rico. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study was stopped early (reason given: The trial was terminated for strategic business reasons; the decision was not based on any safety and/or efficacy concerns.). Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of patients with dose limiting toxicities (DLTs) in dose escalation (Part 1A and Part 1B) (time frame: Baseline through 28 days after first dose). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Sep 2025.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in