A Drug Interaction Study to Evaluate the Pharmacokinetics of ASP015K and Methotrexate in Patients With Rheumatoid Arthritis

Study Overview
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Brief Summary
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A drug interaction study to evaluate the effect of ASP015K (twice daily) on the pharmacokinetics (PK) of once weekly oral methotrexate (MTX).

Detailed Description
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Patients check in on day -1 and remain confined until all the exit procedures are performed on the morning of day 10. Patients to return for 1 post-treatment follow-up visit on day 13. Patients receive a single dose of methotrexate on day 1 and day 8 and ASP015K (twice daily) on days 3 through 8 plus the morning of day 9.

Official Title
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A Phase 1b, Open-Label, Single Sequence, Drug Interaction Study to Evaluate the Pharmacokinetics of ASP015K and Methotrexate in Subjects With Rheumatoid Arthritis

Conditions
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Rheumatoid Arthritis

Intervention / Treatment
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* Drug: peficitinib
* Drug: methotrexate


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: If female, subject must be at least 2 years post menopausal or is surgically sterile per documentation provided by a medical professional and the subject is not pregnant as documented by a negative serum pregnancy test at Screening and negative urine pregnancy test at check-in If male, subject must agree to sexual abstinence and/or to use a highly effective method of birth control during the study period and for 60 days after the last dose of study drug Subject must have a clinical diagnosis of Rheumatoid Arthritis (RA) at least 6 months prior to Screening Subject must be on a stable 15 - 25 mg dose of methotrexate > 28 days prior to Screening If subject is on a non-biologic disease modifying anti-rheumatic drug (DMARDs) therapy, the dose must be stable > 28 days prior to Screening Subject must be willing and able to comply with the study requirements Exclusion Criteria: Subject has a previous history of any clinically significant neurological, gastrointestinal, renal, hepatic, pulmonary, metabolic, cardiovascular, psychiatric, endocrine, hematological disorder or disease, or any other medical condition that would preclude participation in the study Subject has a known history of positive test for hepatitis B surface antigen (HbsAg) or hepatitis C antibody or history of a positive test for human immunodeficiency virus (HIV) infection Subject has received live virus vaccination within the last 30 days prior to study drug administration Subject has a Body Mass Index (BMI) > 35 (kg/m2) Subject is on biologic disease modifying anti-rheumatic drug (DMARDs) therapy Subject has a current history of anemia as defined by hemoglobin of less than 12 g/dL Subject has a recent history (within the last 6 months) of drug or alcohol abuse or a positive urine screen for alcohol or drugs of abuse/illegal drugs at Screening or check-in Subject has received any investigational agent within 30 days of screening

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: ASP015K and methotrexate<br>Patients receive a single dose of methotrexate on day 1 and day 8 and ASP015K (twice daily) on days 3 through 8 plus the morning of day 9. | Drug: peficitinib<br>* oral<br>* Other names: ASP015K;Drug: methotrexate<br>* oral<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pharmacokinetics of methotrexate (MTX): Area under the concentration-time curve from time of dosing to infinity (AUCinf) |  | Days 1 and 8 | 
| Pharmacokinetics of methotrexate (MTX): Maximum concentration (Cmax) |  | Days 1 and 8 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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ASP015K, Rheumatoid Arthritis