A Study to Learn About the Study Medicine (Called Ritlecitinib) For the Potential Treatment of Severe Alopecia Areata (AA) In Children 6 To Less Than 12 Years of Age

AN INTERVENTIONAL PK, PD, PHASE 1, OPEN-LABEL STUDY TO INVESTIGATE PK AND PD OF MULTIPLE-DOSE RITLECITINIB IN CHILDREN 6 TO LESS THAN 12 YEARS OF AGE WITH SEVERE ALOPECIA AREATA

The purpose of the study is to evaluate the pharmacokinetics (how the medicine is changed and eliminated from your body after you take it) and pharmacodynamics (effects of the medicine in the body) of the study medicine (called Ritlecitinib) in children of 6 to <12 years of age with Alopecia Areata, a condition of scalp hair loss. 12 children with alopecia areata will be participating in this study. All participants will receive study medicine with a dose of 20 milligram (mg) orally once daily for 7 days. 5 blood samples will be collected on day 7 for pharmacokinetic evaluation and 2 blood samples each at screening and on Day 7 will be collected for pharmacodynamic evaluation. Participants will take part in the study for about 10 weeks.

Study Overview

• Status: Completed
• Conditions: Alopecia Areata
• Intervention / Treatment: Drug: Ritlecitinib 20 mg

Detailed Description

This is an interventional, Pharmacokinetic (PK), Pharmacodynamic (PD), phase 1, open label study in children 6 to less than 12 years of age with ≥50% scalp hair loss due to severe alopecia areata. The purpose of the study is to collect data to support dose selection for subsequent studies in the same population.

Participants will be screened and, if all eligibility criteria are met, will receive the first dose of Investigational product within 28 days after the screening visit.

Participants will receive 20 mg ritlecitinib in one dose, daily, for 7 consecutive days. Blood samples for pharmacodynamic evaluation will be collected on screening and Day 7. Blood samples for pharmacokinetic evaluation will be collected on Day 7 at: 0 hr (pre-dose), 0.5 hr, 1 hr, 3 hrs, and 8 hrs after dosing.

At least 12 evaluable participants with respect to the primary endpoint will be enrolled in the study.

Participants and their parents/legal guardians will be required to visit the study site 3 times during the study (Screening, Day 1 and Day 7) A safety follow-up visit will be conducted by phone, 28 to 35 days after the last dose of ritlecitinib.

• Study Type: Interventional
• Enrollment (Actual): 15
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • California
    • Encinitas, California, United States, 92024
      • California Dermatology & Clinical Research Institute
  • Florida
    • Coral Gables, Florida, United States, 33146
      • Pediatric Skin Research,LLC
    • Miami, Florida, United States, 33155
      • Nicklaus Children's Hospital
  • Indiana
    • Indianapolis, Indiana, United States, 46250
      • Dawes Fretzin Clinical Research Group, LLC
  • New Mexico
    • Albuquerque, New Mexico, United States, 87102
      • University of New Mexico Health Sciences Center
    • Albuquerque, New Mexico, United States, 87106
      • UNMH
  • Oklahoma
    • Tulsa, Oklahoma, United States, 74136
      • Vital Prospects Clinical Research Institute, PC
  • Oregon
    • Portland, Oregon, United States, 97210
      • Northwest Dermatology Institute
  • Texas
    • San Antonio, Texas, United States, 78218
      • Texas Dermatology and Laser Specialists

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 6 years to 11 years (Child)
• Accepts Healthy Volunteers: No

Description

Key Inclusion criteria:

1. Participants who are 6 to less than12 years old at the baseline visit.
2. A diagnosis of severe AA, including AT and AU, with ≥50% scalp hair loss due to AA (ie, a SALT score of ≥50) at both the Screening and Baseline visits, without evidence of terminal hair regrowth within the previous 12 months.

Key Exclusion Criteria:

1. A known congenital cause of AA, other systemic diseases that may cause hair loss (eg, lupus erythematosus, thyroiditis, systemic sclerosis, lichen planus, etc) or other etiology of hair loss (eg, telogen effluvium, androgenetic alopecia, etc).
2. Any present malignancies or history of malignancies, history of any lymphoproliferative disorder
3. History (one or more episodes) of CMV, varicella, herpes zoster (shingles) or disseminated herpes simplex.
4. Other medical or psychiatric condition (including recent [within the past year] or active suicidal ideation/behavior) that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study.
5. Not up to date with all age appropriate vaccines (including 2-dose vaccination for varicella) or vaccination with attenuated live vaccine within 6 weeks of first dose of study medicine.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Other
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Ritlecitinib 20 mg; Participants will receive Ritlecitinib 20 mg by mouth once daily (QD).	Drug: Ritlecitinib 20 mg; orally administered, Ritlecitinib 20 mg once daily (QD)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Area under the plasma concentration time profile over the dosing interval 24 hrs, at steady-state (AUC24) on Day 7	AUC is a measure of the plasma concentration of the drug over time. It is used to characterize drug absorption.	0 (pre-dose), 0.5, 1, 3 and 8 hours post-dose on Day 7

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Maximum Observed Plasma Concentration (Cmax)	Maximum Observed Plasma Concentration	0 (pre-dose), 0.5, 1, 3 and 8 hours post-dose on Day 7
Time to Reach Maximum Observed Plasma Concentration (Tmax)	Time to Reach Maximum Observed Plasma Concentration	0 (pre-dose), 0.5, 1, 3 and 8 hours post-dose on Day 7
Apparent Oral Clearance (CL/F)	Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed.	Day 7
Apparent Volume of Distribution (Vz/F)	Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired plasma concentration of a drug. Apparent volume of distribution after oral dose (Vz/F) is influenced by the fraction absorbed.	0 (pre-dose), 0.5, 1, 3 and 8 hours post-dose on Day 7
Terminal elimination Half-Life (t1/2)	Terminal elimination half-life.	0 (pre-dose), 0.5, 1, 3 and 8 hours post-dose on Day 7
Change from baseline in interferon gamma, IP-10 and lymphocyte subsets (T cell, B cell, and NK cells)	Change from baseline in interferon gamma, IP-10 and lymphocyte subsets (T cell, B cell, and NK cells)	Day 7
Incidence of treatment emergent adverse event (TEAE)	To evaluate the safety and tolerability of ritlecitinib in children with alopecia areata 6 to less than 12 years of age.	Baseline through Week 5 (Day 35)
Incidence of Treatment related AEs	To evaluate the safety and tolerability of ritlecitinib in children with alopecia areata 6 to less than 12 years of age.	Baseline through week 5 (Day 35)
Incidence of Serious AEs (SAEs)	To evaluate the safety and tolerability of ritlecitinib in children with alopecia areata 6 to less than 12 years of age.	Baseline through week 5 (Day 35)
Incidence of AEs leading to discontinuation	To evaluate the safety and tolerability of ritlecitinib in children with alopecia areata 6 to less than 12 years of age.	Baseline through Day 7
Clinically significant abnormalities in vital signs	To evaluate the safety and tolerability of ritlecitinib in children with alopecia areata 6 to less than 12 years of age.	Baseline through Day 7
Clinically significant abnormalities in clinical laboratory values	To evaluate the safety and tolerability of ritlecitinib in children with alopecia areata 6 to less than 12 years of age.	Baseline through Day 7
For overall taste, percent of participants reporting likeability on the scale from 1-5 will be reported	Overall taste assesses the degree that a participant likes or dislikes a drug formulation based on sensory attributes experienced by the participant after tasting a product. It is scored based on a measurement of taste questionnaire.	Day 1 and 7
For overall mouthfeel, percent of participants reporting how the medicine felt on the scale from 1-5 will be reported.	Mouth feel assesses the degree that a participant experienced this sensory attribute after tasting a drug formulation. It is scored based on a measurement of taste questionnaire	Day 1 and 7
For overall volume, percent of participants reporting likeability of the amount of medicine taken on the scale from 1-5 will be reported.	Volume assesses the participant experience on the amount of medicine taken. It is scored based on taste assessment questionnaire	Day 1 and 7

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): March 2, 2023
• Primary Completion (Actual): August 11, 2023
• Study Completion (Actual): August 11, 2023

Study Registration Dates

• First Submitted: December 6, 2022
• First Submitted That Met QC Criteria: December 6, 2022
• First Posted (Actual): December 14, 2022

Study Record Updates

• Last Update Posted (Actual): August 25, 2023
• Last Update Submitted That Met QC Criteria: August 24, 2023
• Last Verified: August 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Skin Diseases; Pathological Conditions, Anatomical; Hypotrichosis; Hair Diseases; Alopecia; Alopecia Areata
• Other Study ID Numbers: B7981031

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