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HealthyPhase 1NCT07235163

A Study to Learn How Different Amounts of the Study Medicine Called PF-08065010 Are Tolerated and Act in the Body of Healthy Adults

A Phase 1 study testing PF-08065010 in people with Healthy, run by Pfizer at 1 site in Belgium.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

The purpose of this study is to learn about the safety and effects of the study medicine (called PF-08065010) for possible treatment of rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE). Read more about this study

Who is it for?
Ages 18 to 65 yearsHealthy volunteers can take part
Conditions the study is for
Healthy
What is being tested?
PF-08065010
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
100 participants
Where
1 siteBelgium
Study dates
21 Apr 2026to 1 Sep 2027
Phase
Phase 1
Are there results?
Not yet: the study is under way

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 to 65 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • male or female between 18 and 65 years of age
  • deemed to be healthy

Who cannot join

  • Evidence or history of clinically significant medical conditions.
  • History of human immunodeficiency virus (HIV) infection, hepatitis B, or hepatitis C; positive testing for HIV, hepatitis B surface antigen (HBsAg)or hepatitis C antibody (HCVAb).
  • History of alcohol abuse or binge drinking and/or any other illicit drug use or dependence within 6 months of Screening.
  • A positive urine drug test.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Belgium1 site, 1 recruiting
  • Pfizer Clinical Research Unit - Brussels

    Brussels, Bruxelles-capitale, Région de, B-1070

    Recruiting

Other trials in Belgium

About this study

Official title: AN INTERVENTIONAL, PHASE 1, RANDOMIZED STUDY WITH DOUBLE-BLIND AND SPONSOR-OPEN, PLACEBO-CONTROLLED SINGLE AND MULTIPLE DOSE ESCALATION TO EVALUATE THE SAFETY, TOLERABILITY, PHARMACOKINETICS, PHARMACODYNAMICS, AND IMMUNOGENICITY OF PF-08065010 IN HEALTHY ADULT PARTICIPANTS

The purpose of this study is to learn about the safety and effects of the study medicine (called PF-08065010) for possible treatment of rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE).

This study is seeking participants who are:

Read more
  • male or female between 18 and 65 years of age
  • deemed to be healthy

Participants in this study will receive PF-08065010 or placebo. A placebo does not have any medicine in it but looks just like the medicine being studied. PF-08065010 or placebo will be given as a shot (in the abdomen, thigh or back of the arms) or as an IV infusion in the arm (given directly into a vein) at the study clinic.

In Part A, participants will take PF-08065010 or placebo only 1 time and will take part in this study for about 5 months. During this time, they will stay at the study clinic for about 9-10 days and will have about 6 more study visits at the study clinic.

Participants in Part B of the study will take PF-08065010 or placebo once a month, for 3 months and will take part in this study for about 7 months. During this time, they will stay at the study clinic for about 4 days each month and will have about 6 more study visits at the study clinic.

During study clinic stays and study visits, urine, blood samples, and physical exams will be done.

Conditions
Healthy
Being tested
PF-08065010, Placebo

What participants receive

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

  • PF-08065010Drug

    Experimental Pfizer compound which will be subcutaneous (SC) or intravenous (IV).

  • PlaceboDrug

    Placebo which will be SC or IV

Study groups in NCT07235163
Study groupRoleWhat they receive
Part A: Cohort 3: single ascending dose (SAD)ExperimentalDose C - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 8: single ascending dose (SAD)ExperimentalOptional Japanese Cohort dose to be determined - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 1: single ascending dose (SAD)ExperimentalDose A - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 5: single ascending dose (SAD)ExperimentalDose E - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 7: single ascending dose (SAD)ExperimentalDose G - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 4: single ascending dose (SAD)ExperimentalDose D - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 2: single ascending dose (SAD)ExperimentalDose B - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 9: single ascending dose (SAD)ExperimentalOptional Chinese Cohort dose to be determined - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 6: single ascending dose (SAD)ExperimentalDose F - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 10: single ascending dose (SAD)ExperimentalOptional Cohort with dose to be determined - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part A: Cohort 11: single ascending dose (SAD)ExperimentalOptional Cohort with dose to be determined - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part B: Cohort 12: multiple doseExperimentalDose F - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part B: Cohort 13: multiple doseExperimentalOptional Cohort with dose to be determined - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo
Part B: Cohort 14: multiple doseExperimentalOptional Cohort with dose to be determined - Participants will receive PF-08065010 or placebo.
Receives: Drug: PF-08065010; Drug: Placebo

What is being measured

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

  1. Number of Participants with Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)

    Part A

    Measured: Baseline, approximately up to 5 months

  2. Number of Participants With Clinically Significant Laboratory Abnormalities

    Part A

    Measured: Baseline, approximately up to 5 months

  3. Number of Participants With Vital Sign Abnormalities

    Part A

    Measured: Baseline, approximately up to 5 months

  4. Number of Participants with Change from Baseline in Physical Exam (PE) Parameters

    Part A

    Measured: Baseline, approximately up to 5 months

  5. Number of Participants with Change from Baseline in Electrocardiogram (ECG) Parameters

    Part A

    Measured: Baseline, approximately up to 5 months

  6. Number of Participants with Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)

    Part B

    Measured: Baseline, approximately up to 7 months

  7. Number of Participants With Clinically Significant Laboratory Abnormalities

    Part B

    Measured: Baseline, approximately up to 7 months

  8. Number of Participants with Vital Sign Abnormalities

    Part B

    Measured: Baseline, approximately up to 7 months

  9. Number of Participants with Change from Baseline in Physical Exam (PE) Parameters

    Part B

    Measured: Baseline, approximately up to 7 months

  10. Number of Participants with Change from Baseline in Electrocardiogram (ECG) Parameters

    Part B

    Measured: Baseline, approximately up to 7 months

Secondary outcomes (9)
  1. Area Under the Plasma Concentration-time Profile from Time Zero to the Time of Last Quantifiable Concentration (AUClast)

    Part A

    Measured: Predose (Day 1), approximately up to 5 months

  2. Area Under the Curve from Time Zero to Extrapolated Infinite Time (AUCinf)

    Part A

    Measured: Predose (Day 1), approximately up to 5 months

  3. Maximum Observed Plasma Concentration (Cmax)

    Part A

    Measured: Predose (Day 1), approximately up to 5 months

  4. Time to Reach Maximum Observed Plasma Concentration (Tmax)

    Part A

    Measured: Predose (Day 1), approximately up to 5 months

  5. Plasma decay half-life (t1/2) is the time measured for the plasma concentration to decrease by one half.

    Part A

    Measured: Predose (Day 1), approximately up to 5 months

  6. Area under the serum concentration time profile over the dosing interval of 28 days (AUCtau)

    Part B

    Measured: Predose (Day 1), approximately up to 7 months

  7. Maximum Observed Plasma Concentration (Cmax)

    Part B

    Measured: Predose (Day 1), approximately up to 7 months

  8. Time to Reach Maximum Observed Plasma Concentration (Tmax)

    Part B

    Measured: Predose (Day 1), approximately up to 7 months

  9. Plasma Decay Half-Life (t1/2)

    Part B

    Measured: Predose (Day 1), approximately up to 7 months

Timeline

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

  1. First posted19 Nov 2025
  2. Study start21 Apr 2026
  3. Primary completion1 Sep 2027 (estimated)
  4. Study completion1 Sep 2027 (estimated)

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
Basic science
Allocation
Randomised
Intervention model
Sequential
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
100 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07235163
Sponsor's protocol ID
C6341001
Other IDs
2025-523759-76-01, 2025
Status last verified
Aug 2026
First submitted
14 Nov 2025
Last updated
24 Aug 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
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-08065010 in people with Healthy, run by Pfizer at 1 site in Belgium.

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 2 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: looking for participants now, as of the sponsor's last update on 24 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Belgium. 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?

This study is still under way. Results are not available in the source record yet.

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

Contact Pfizer CT.gov Call Center (1-800-718-1021, ClinicalTrials.gov_Inquiries@pfizer.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Participants with Treatment Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs) (time frame: Baseline, approximately up to 5 months). The study lists 10 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 24 Aug 2026.

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Clinical Trial NCT07235163 | AzTrials