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Healthy VolunteersPhase 1NCT05852340

A Study to Assess Two Forms of The Study Medicine (Ritlecitinib) in Healthy Adult Participants

A Phase 1 study testing Ritlecitinib in people with Healthy Volunteers and Adult, run by Pfizer at 1 site in Belgium.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The purpose of this study is to compare if two forms of study medicine, Ritlecitinib, get processed differently in healthy adults. This study is seeking participants who are: aged 18 or older; male or female who are healthy as determined by medical assessment ; Body-mass Index (BMI) of 16 to 32, and a total body… Read more about this study

Who is it for?
Ages 18 years and olderHealthy volunteers can take part
Conditions the study is for
Healthy Volunteers, Adult, Pharmacokinetics
What is being tested?
Ritlecitinib
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
12 participants
Where
1 siteBelgium
Study dates
9 May 2023to 24 Jul 2023
Phase
Phase 1
Are there results?
Yes, posted in the registrySummary in the doctors' view

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
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Aged 18 or older.
  • Male or female who are healthy as determined by medical assessment.
  • Body-mass Index (BMI) of 16 to 32, and a total body weight > 45kg.

Who cannot join

  • Any condition possibly affecting drug absorption (eg, gastrectomy, cholecystectomy).
  • Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurological, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at the time of dosing).
  • Known immunodeficiency disorder, including positive serology for HIV, or a first degree relative with a hereditary immunodeficiency, or infections (acute or chronic).

Trial locations and contacts

1 site in 1 country.

Belgium1 site
  • Pfizer Clinical Research Unit - Brussels

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

Other trials in Belgium

About this study

Official title: A PHASE 1, RANDOMIZED, OPEN-LABEL, CROSSOVER STUDY TO ESTIMATE THE RELATIVE BIOAVAILABILITY OF PEDIATRIC RITLECITINIB (PF-06651600) SPRINKLED IN APPLESAUCE, YOGHURT AND STRAWBERRY JAM RELATIVE TO INTACT BLEND-IN CAPSULE OF RITLECITINIB AND THE EFFECT OF FOOD ON THE BIOAVAILABILITY OF THE INTACT BLEND-IN CAPSULE DOSAGE FORMULATION OF RITLECITINIB IN HEALTHY ADULT PARTICIPANTS

The purpose of this study is to compare if two forms of study medicine, Ritlecitinib, get processed differently in healthy adults.

This study is seeking participants who are:

Read more
  • aged 18 or older;
  • male or female who are healthy as determined by medical assessment ;
  • Body-mass Index (BMI) of 16 to 32, and a total body weight > 45kg.

The study will take up to 2.5 months, including the screening period. There will be 5 periods in total for this study. Participants will have to stay at the study clinic for at least 11 days. Participants will take Riltecitinib either as sprinkled in Soft Food or as Intact Blend-In Capsule. On day 1 of each period, participants will take Riltecitinib and have blood samples taken both before and afterwards. Participants will also answer questions for taste assessment purpose. A follow-up phone call will be made at 28 to 35 days after the last study period.

Read the detailed description

Ritlecitinib is a covalent and irreversible inhibitor of JAK3 with high selectivity over the other JAK isoforms (JAK1, JAK2, and TYK2). Ritlecitinib also inhibits irreversibly the tyrosine kinase expressed in TEC family kinases with selectivity over the broader human kinome. Treatment with ritlecitinib is expected to inhibit the inflammatory pathways mediated by IL 7, IL 15 and IL 21, all implicated in UC, CD, AA, RA, and vitiligo. Moreover, due to lack of activity against the other JAK isoforms, ritlecitinib is expected to spare immunoregulatory cytokines such as IL 10, IL 27 and IL 35, which are critical to the maintenance of immunosuppressive functions and immune homeostasis.

The objective of this study is to estimate the impact of administration methods on the bioavailability of the pediatric ritlecitinib intact BiC formulation. The study will be conducted as a Phase 1, open-label, single dose, randomized, 4-crossover periods and 1-fixed period design in a single cohort of approximately 12 healthy male or female participants at a single center. Participants will be randomized into 1 of 4 sequences of treatment. Blood samples will be collected for PK analysis. A taste assessment will be also conducted.

Participants will participate in the study for up to approximately 2.5 months, with the inclusion of the screening and follow-up period. On Day 1 of each period, participants will receive a single dose of IP. Administration of IP will be via dosing using intact BiCs with water or by emptying the capsule contents on soft food as per dosing instructions.

Participants will be confined in the CRU for a total of at least 11 days and discharged at the discretion of the investigator. A follow-up phone call will be made at least 28 calendar days and up to 35 calendar days after the last administration of the study intervention to capture any potential AE and confirm appropriate contraceptive usage.

Tolerability and safety will be assessed for all treatments by monitoring AEs.

Being tested
Ritlecitinib
Keywords
Adult, Pharmacokinetic

What participants receive

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

  • RitlecitinibDrug

    Also called PF-06651600

    ritlecitinib 1 x 30 mg intact BiC (Treatment Arms A, E)

    ritlecitinib 1 x 30 mg intact BiC sprinkled on soft foods (Treatment Arms B, C, D)

Study groups in NCT05852340
Study groupRoleWhat they receive
Treatment AActive comparatorritlecitinib 1 x 30 milligram (mg) intact blend-in-capsule (BiC) in fasted state
Receives: Drug: Ritlecitinib
Treatment BActive comparatorcontents of ritlecitinib 1 x 30 mg intact BiC sprinkled on strawberry jam in fasted state
Receives: Drug: Ritlecitinib
Treatment CActive comparatorcontents of ritlecitinib 1 x 30 mg intact BiC sprinkled on yoghurt in fasted state
Receives: Drug: Ritlecitinib
Treatment DActive comparatorcontents of ritlecitinib 1 x 30 mg intact BiC sprinkled on applesauce in fasted state
Receives: Drug: Ritlecitinib
Treatment EActive comparatorritlecitinib 1 x 30 mg intact BiC given with high fat meal
Receives: Drug: Ritlecitinib

What is being measured

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

  1. Area Under the Plasma Concentration-Time Profile From Time Zero Extrapolated to Infinite Time (AUCinf) of Ritlecitinib

    AUCinf was defined as area under the plasma-concentration time profile from time zero extrapolated to infinite time. AUCinf for ritlecitinib was calculated by AUClast + (Clast/kel), where Clast was the predicted plasma concentration at the last quantifiable time point from the log-linear regression analysis and kel was the terminal phase rate constant calculated by a linear regression of the log-linear concentration time curve.

    Measured: 0 (pre-dose), 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 9, 12 and 24 hours post-dose on Day 1 of each period. Each treatment period lasted 24 hours. Dosing of each period was separated by at least a 48-hour washout interval.

  2. Maximum Observed Concentration (Cmax) of Ritlecitinib

    Cmax was defined as maximum observed plasma concentration. Cmax for ritlecitinib was observed directly from data.

    Measured: 0 (pre-dose), 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 9, 12 and 24 hours post-dose on Day 1 of each period. Each treatment period lasted 24 hours. Dosing of each period was separated by at least a 48-hour washout interval.

Secondary outcomes (2)
  1. Number of Participants With All-Causality and Treatment-Related Treatment Emergent Adverse Events (TEAEs)

    An adverse event (AE) was any untoward medical occurrence in a participant who received study treatment without regard to possibility of causal relationship. Treatment-related AE was any untoward medical occurrence attributed to study treatment in a participant who received study treatment. Relatedness to study treatment was assessed by the investigator. A serious adverse event (SAE) was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. Treatment-emergent events were events between first dose of study treatment and up to approximately 35 days that were absent before treatment or that worsened relative to pretreatment state.

    Measured: From the first dose of study treatment up to 28-35 days after last dose of study treatment (ie, up to 45 days)

  2. Number of Participants With Laboratory Abnormalities

    Hematology included hemoglobin, hematocrit, red blood cell count, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, platelet and white blood cell count, total neutrophils, eosinophils, etc. Chemistry included blood urea nitrogen, creatinine, glucose, calcium, sodium, potassium, chloride, bicarbonate, aspartate aminotransferase, alanine aminotransferase, total bilirubin, alkaline phosphatase, uric acid, albumin, total protein, etc. Urinalysis included pH, glucose, protein, blood, ketones, nitrites, leukocyte esterase, urobilinogen, urine bilirubin and microscopy. Laboratory abnormalities were judged by the investigator. Laboratory abnormalities reported for at least 1 participant in the whole study are presented here.

    Measured: From the first dose of study treatment up to 28-35 days after last dose of study treatment (ie, up to 45 days)

Timeline

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

  1. First posted10 May 2023
  2. Study start9 May 2023
  3. Primary completion15 Jun 2023
  4. Study completion24 Jul 2023

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
Randomised
Intervention model
Crossover
Masking
None (open label)
Enrolment
12 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05852340
Sponsor's protocol ID
B7981078
Other IDs
2022-502872-22-00
Status last verified
Oct 2024
First submitted
1 May 2023
Last updated
16 Oct 2024
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 Ritlecitinib in people with Healthy Volunteers and Adult, 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 3 inclusion and 3 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: finished, as of the sponsor's last update on 16 Oct 2024. 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?

Yes. Results are posted in the registry (first posted 16 Oct 2024). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

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?

Area Under the Plasma Concentration-Time Profile From Time Zero Extrapolated to Infinite Time (AUCinf) of Ritlecitinib (time frame: 0 (pre-dose), 0.25, 0.5, 1, 1.5, 2, 3, 4, 6, 9, 12 and 24 hours post-dose on Day 1 of each period. Each treatment period lasted 24 hours. Dosing of each period was separated by at least a 48-hour washout interval.). The study lists 2 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 16 Oct 2024; AzTrials last refreshed its copy on 3 Nov 2026.

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