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Relationship between methotrexate polyglutamates in peripheral red and white blood cells with disease activity: towards optimal methotrexate dosing and route of administration in rheumatoid arthritis.

Relationship between methotrexate polyglutamates in peripheral red and white blood cells with disease activity: towards optimal methotrexate dosing and route of administration in rheumatoid arthritis. - Methotrexate polyglutamates in peripheral blood mononuclear cells

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
NL-OMON
Registry ID
NL-OMON52447
Enrollment
40
Registered
2018-01-23
Start date
2018-01-01
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

rheumatism Rheumatoid arthritis

Interventions

None listed

Sponsors

Overige Centra
Lead Sponsor

Eligibility

Age
18 Years to 99 Years

Inclusion criteria

Inclusion criteria: Adults Diagnosed with rheumatoid arthritis Able to read Dutch texts (only prednisolone (and/or triamcinolonacetonide i.a./i.m.) is allowed as co-medication and no other DMARDs)

Exclusion criteria

Exclusion criteria: * Rheumatic autoimmune disease other than RA, e.g., systemic lupus erythematosus (SLE), mixed connective tissue disease (MCTD), scleroderma, polymyositis * Subjects who have received an investigational drug within 30 Days prior to the screening visit, known sensitivity to any component of the study drug or previous hypersensitivity reaction or other clinically significant reaction to s.c. medications, any clinically significant hepatic, renal, cardiac, pulmonary, gastrointestinal, metabolic or endocrine disturbances, other medical or psychiatric condition, or clinically relevant abnormal values on any investigation, which in the opinion of the investigator, could make the subject unsuitable for the study, could compromise subject safety, limit the subject*s ability to complete the study, and/or compromise the objectives of the study. History of substance abuse or alcohol abuse.

Design outcomes

Primary

MeasureTime frame
1) MTX-PGs accumulation and MTX-PG distribution profiles in PBMCs and RBC from RA patients following 6 months oral or subcutaneous MTX therapy.

Secondary

MeasureTime frame
2) Profiles of FPGS pre-mRNA splicing aberrations in PBMCs from RA patients following 6 months MTX therapy. 3) Clinical disease parameters, folate levels and impact of MTX on disease activity. 4) Validation of a LC-MS/MS based method for MTX-PGs in DBS.

Countries

Netherlands

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP) · Data processed: Aug 9, 2026