FIH Study to Evaluate the Tolerability of PF-07832837 in Healthy Adults and Patients

A PHASE 1, FIRST IN HUMAN, RANDOMIZED, DOUBLE-BLIND, SPONSOROPEN, PLACEBO-CONTROLLED, SINGLE- AND MULTIPLE DOSE ESCALATION, PARALLEL GROUP STUDY TO EVALUATE THE SAFETY, TOLERABILITY, PHARMACOKINETICS AND PHARMACODYNAMICS OF PF-07832837 IN HEALTHY PARTICIPANTS AND PARTICIPANTS WITH MODERATE TO SEVERE ATOPIC DERMATITIS

The purpose of the study is to evaluate the safety, tolerability, and pharmacokinetics of escalating single and repeat doses of PF-07832837 in healthy participants and in participants with moderate to severe atopic dermatitis. An additional goal is to assess the pharmacodynamics of PF-07832837 in participants with moderate to severe AD, including potential effects on clinical signs and symptoms

Study Overview

• Status: Recruiting
• Conditions: Atopic Dermatitis; Healthy Participants
• Intervention / Treatment: Other: Placebo; Drug: PF-07832837

Detailed Description

This is a first-in-human (FIH) study of PF-07832837 that will be conducted in 2 parts: Part 1 will be conducted in healthy adult participants and Part 2 will be conducted in adult participants with moderate to severe AD.

Part 1 is within-cohort randomized, participant- and investigator-blind, sponsor-open, placebo-controlled investigation of the safety, tolerability, PK, and immunogenicity following single and multiple ascending doses of PF-07832837 in healthy participants. Part 1 may also include a cohort of Japanese healthy adult participants to provide safety, tolerability, and PK data in Japanese population to enable the inclusion of Japanese participants in future clinical trials.

Part 2 is a randomized, participant- and investigator-blind, sponsor-open, placebo-controlled study to investigate the safety, tolerability, PK, and pharmacodynamics (including clinical effects) of PF-07832837 in participants with moderate to severe AD. Part 2 will consist of cohorts of participants with moderate to severe AD. A total of approximately 28 participants will receive either active PF-07832837 or placebo.

• Study Type: Interventional
• Enrollment (Estimated): 119
• Phase: Phase 1

Contacts and Locations

• Study Contact: Name: Pfizer CT.gov Call Center; Phone Number: 1-800-718-1021; Email: ClinicalTrials.gov_Inquiries@pfizer.com

Study Locations

• United States
  • California
    • Anaheim, California, United States, 92801
      • Recruiting
      • Anaheim Clinical Trials, LLC
    • San Diego, California, United States, 92123
      • Recruiting
      • TCR Medical Corporation
  • Florida
    • Miami, Florida, United States, 33133
      • Recruiting
      • Miami Dermatology and Laser Research
  • Michigan
    • Troy, Michigan, United States, 48084
      • Recruiting
      • Revival Research Institute, LLC
  • Pennsylvania
    • Philadelphia, Pennsylvania, United States, 19103
      • Recruiting
      • Paddington Testing Company

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Part 1 only: Adult participants between 18 to 55 years of age, inclusive, at the time of signing the ICD
• Part 2 only: Adult participants, who at the time of screening, are between the ages of 18 and 70 years, inclusive.
• Part 1 only: Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination, vital sign assessments, temperature, 12-lead ECGs, laboratory tests
• BMI of 17.5 to 40 kg/m2; and a total body weight >50 kg (110 lbs)

• Part 2 only: Must meet the following AD criteria:

  1. Have a clinical diagnosis of chronic AD (also known as atopic eczema) for at least 1 year prior to Day 1 and have the diagnosis of AD confirmed by photographs (at screening) and diagnostic criteria for AD.
  2. Either an inadequate response to treatment with standard of care treatments (excluding systemic immunosuppressant treatments) consistent with AD treatment guidelines (for at least 4 consecutive weeks within 6 to 12 months (depending on time since initial diagnosis) of the first dose of the study intervention. OR Have a documented reason why topical treatments are considered medically inappropriate within the last year.
  3. Have moderate to severe AD (defined as having an affected BSA (captured as part of EASI) ≥10%, IGA ≥3, and EASI ≥12 at both the screening and baseline visits).
  4. Have an otherwise healthy medical evaluation (other than signs and symptoms of AD) including medical history, physical examination, vital sign assessments, temperature, 12-lead ECGs, laboratory tests.

Controlled comorbid diseases are acceptable so long as they do not require administration of prohibited medications. This includes participants with mild or moderate asthma that is well-controlled (not requiring high dose inhaled corticosteroids, systemic [oral or parenteral] corticosteroids, or biologic asthma treatments).

Exclusion Criteria:

• Have a history of systemic infection requiring hospitalization and parenteral antimicrobial therapy, any lymphoproliferative disorder, malignancies.
• Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurological, immunological/rheumatological disorder.
• Have undergone significant trauma or major surgery within 1 month of the first dose of study intervention.

• Evidence of active, latent, or inadequately treated infection with Mycobacterium tuberculosis (TB) as defined by both of the following:

  1. A positive QuantiFERON-TB Gold In-tube or equivalent test.
  2. History of either untreated or inadequately treated latent or active TB infection, or current treatment for the same.

Part 2 Only

• Currently have active forms of other inflammatory skin diseases
• Have history of or current evidence of skin conditions at the time of Day 1 that would interfere with evaluation of atopic dermatitis or response to treatment. Have active chronic or acute skin infection requiring treatment with systemic antibiotics, antivirals, antiparasitics, antiprotozoals, or antifungals within 2 weeks prior to Day 1, or superficial skin infections within 1 week prior to Day 1.
• Score of ≥ 5 on the Fitzpatrick Skin Type Assessment.
• History of anaphylaxis with the following exceptions: participants with sensitivity and/or anaphylaxis only to a single, avoidable allergen (eg, aspirin, penicillin, sulfa drugs, nonsteroidal anti-inflammatory drugs [NSAIDs], peanuts) may be enrolled, if in the opinion of the investigator, the participant is aware of the hypersensitivity and avoids the problematic allergen. Participants must carry appropriate treatment for anaphylaxis and must know how to manage anaphylactic reactions.
• Any investigational or experimental therapy taken or procedure performed for AD, psoriasis, psoriatic arthritis, rheumatoid arthritis or other inflammatory diseases in the previous 1 year should be discussed with the Pfizer Medical Monitor (or designee).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: PF-07832837; single or multiple doses of PF-07832837 at ascending dose levels	Drug: PF-07832837; escalated doses of PF-07832837
Placebo Comparator: placebo; single or multiple doses of placebo	Other: Placebo; placebo

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants With Treatment Emergent Treatment-Related Adverse Events (AEs) and serious adverse events (SAEs) Following single ascending doses (SAD)	An adverse event (AE) was any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. An SAE was defined as any untoward medical occurrence that, at any dose: resulted in death; required inpatient hospitalization or prolongation of existing hospitalization; was life-threatening; resulted in persistent or significant disability/incapacity; was a congenital anomaly/birth defect or other important medical events. An AE was considered as treatment emergent if the event started during the effective duration of treatment. All events that started on or after the first dosing day up to the last dose plus the lag time were considered as TEAEs.	Baseline up to Day 35
Number of Participants with Clinically significant Laboratory Abnormalities Following SAD	Number of participants with any laboratory test abnormalities meeting pre-defined criteria was reported in this outcome measure.	Baseline up to Day 35
Number of Participants with Change from Baseline in Electrocardiogram (ECG) Findings Following SAD	Twelve lead ECGs were obtained using an ECG machine that automatically calculated the heart rate and measured PR interval, QT interval, corrected QT (QTc) intervals and QRS complex. Clinically significant findings were determined by the investigator.	Baseline up to Day 35
Number of Participants with Clinically Significant Change from Baseline in Vital Signs Following SAD	Vital signs included blood pressure, pulse rate, respiratory rate, oxygen saturation and oral temperature. Clinically significant findings were determined by the investigator.	Baseline up to Day 35
Number of Participants with Clinically Significant Change from Baseline in Cardiac Telemetry Findings Following SAD	Cardiac telemetry was collected in Part 1 SAD cohorts only. Number of participants with any cardiac telemetry abnormalities were reported in this outcome measure.	Day 1
Number of Participants With Treatment Emergent Treatment-Related AEs and SAEs Following multiple ascending doses (MAD)	An adverse event (AE) was any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. An SAE was defined as any untoward medical occurrence that, at any dose: resulted in death; required inpatient hospitalization or prolongation of existing hospitalization; was life-threatening; resulted in persistent or significant disability/incapacity; was a congenital anomaly/birth defect or other important medical events. An AE was considered as treatment emergent if the event started during the effective duration of treatment. All events that started on or after the first dosing day up to the last dose plus the lag time were considered as TEAEs.	Baseline up to Day 50
Number of Participants with Clinically significant Laboratory Abnormalities Following MAD	Number of participants with any laboratory test abnormalities meeting pre-defined criteria was reported in this outcome measure.	Baseline up to Day 50
Number of Participants with Change from Baseline in Electrocardiogram (ECG) Findings Following MAD	Twelve lead ECGs were obtained using an ECG machine that automatically calculated the heart rate and measured PR interval, QT interval, corrected QT (QTc) intervals and QRS complex. Clinically significant findings were determined by the investigator.	Baseline up to Day 50
Number of Participants with Clinically Significant Change from Baseline in Vital Signs in participants with AD	Vital signs included blood pressure, pulse rate, respiratory rate, oxygen saturation and oral temperature. Clinically significant findings were determined by the investigator.	Baseline up to Day 78
Number of Participants With Treatment Emergent Treatment-Related AEs and SAEs in participants with atopic dermatitis (AD)	An adverse event (AE) was any untoward medical occurrence in a participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. An SAE was defined as any untoward medical occurrence that, at any dose: resulted in death; required inpatient hospitalization or prolongation of existing hospitalization; was life-threatening; resulted in persistent or significant disability/incapacity; was a congenital anomaly/birth defect or other important medical events. An AE was considered as treatment emergent if the event started during the effective duration of treatment. All events that started on or after the first dosing day up to the last dose plus the lag time were considered as TEAEs.	Baseline up to Day 80
Number of Participants with Clinically significant Laboratory Abnormalities in participants with AD	Number of participants with any laboratory test abnormalities meeting pre-defined criteria was reported in this outcome measure.	Baseline up to Day 80

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percent change from baseline in Eczema Area and Severity Index (EASI) total score at Week 8	EASI evaluates severity of participants' AD (excluded scalp, palms, soles) based on severity of AD clinical signs and % of body surface area (BSA) affected. Severity of clinical signs of AD (erythema, induration/papulation, excoriation and lichenification) scored separately for each of 4 body regions (head and neck, upper limbs, trunk [including axillae and groin)] and lower limbs [including buttocks]) on 4-point scale: 0= absent; 1= mild; 2= moderate; 3= severe. EASI area score was based upon % BSA with AD in body region: 0 (0%), 1 (>0 to <10%), 2 (10 to <30%), 3 (30 to <50%), 4 (50 to <70%), 5 (70 to <90%) and 6 (90 to 100%). Total EASI score =0.1*Ah*(Eh+Ih+Exh+Lh) + 0.2*Au*(Eu+Iu+ExU+Lu) + 0.3*At*(Et+It+Ext+Lt) + 0.4*Al*(El+Il+Exl+Ll); A = EASI area score; E = erythema; I = induration/papulation; Ex = excoriation; L = lichenification; h = head and neck; u = upper limbs; t = trunk; l = lower limbs. Total EASI score ranged from 0.0 to 72.0, higher scores = greater severity of AD.	Baseline, Week 8
Area Under the Curve From Time Zero to Last (AUClast) of PF-07832837 following SAD	estimated by Linear/Log trapezoidal method	Day 1 to Day 35
Area Under the Curve From Time Zero to Extrapolated Infinite Time (AUCinf) of PF-07832837 following SAD	AUClast + (Clast*/kel), where Clast* is the predicted serum concentration at the last quantifiable time point estimated from the log-linear regression analysis	Day 1 to Day 35
Maximum Observed Serum Concentration (Cmax) of PF-07832837 following SAD	Observed directly from data	Day 1 to Day 35
Time to Reach Maximum Observed Serum Concentration (Tmax) of PF-07832837 following SAD	Observed directly from data as time of first occurrence	Day 1 to Day 35
Terminal serum elimination half life (t1/2) of PF-07832837 following SAD	Loge(2)/kel, where kel is the terminal phase rate constant calculated by a linear regression of the loglinear concentration time curve. Only those data points judged to describe the terminal log-linear decline will be used in the regression	Day 1 to Day 35
Area Under the Serum Concentration-Time Curve Over the Dosing Interval (AUCtau) of PF-07832837 following MAD	Linear/log trapezoidal method	Day 1 to Day 22
Maximum Observed Serum Concentration (Cmax) of PF-07832837 following MAD	Observed directly from data	Day 1 to Day 22
Time to Reach Maximum Observed Serum Concentration (Tmax) of PF-07832837 following MAD	Observed directly from data as the time of first occurrence	Day 1 to Day 22

Collaborators and Investigators

• Sponsor: Pfizer
• Investigators: Study Director: Pfizer CT.gov Call Center, Pfizer

Publications and helpful links

Helpful Links

• To obtain contact information for a study center near you, click here.

Study record dates

Study Major Dates

• Study Start (Actual): November 5, 2024
• Primary Completion (Estimated): June 2, 2027
• Study Completion (Estimated): June 2, 2027

Study Registration Dates

• First Submitted: August 19, 2024
• First Submitted That Met QC Criteria: August 19, 2024
• First Posted (Actual): August 21, 2024

Study Record Updates

• Last Update Posted (Actual): July 22, 2026
• Last Update Submitted That Met QC Criteria: July 21, 2026
• Last Verified: July 1, 2026

More Information

Terms related to this study

• Keywords: atopic dermatitis; pharmacokinetics; monoclonal antibody; anti-inflammatory; pharmacodynamics; healthy; first in human
• Additional Relevant MeSH Terms: Genetic Diseases, Inborn; Immune System Diseases; Hypersensitivity, Immediate; Hypersensitivity; Skin Diseases; Skin Diseases, Genetic; Skin Diseases, Eczematous; Dermatitis; Congenital, Hereditary, and Neonatal Diseases and Abnormalities; Skin and Connective Tissue Diseases; Dermatitis, Atopic
• Other Study ID Numbers: C4991001; NCT06564389 (Registry Identifier: ClinicalTrials.gov)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO
• IPD Plan Description: 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.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: Yes