Therapeutic Drug Monitoring of Adalimumab in Psoriasis Patients

Ghent University Hospital (UZ)

Status: Completed

Conditions: Psoriasis

Study type: Observational

Funder types: Other

Identifiers

NCT02147600

EC UZG 2013/1148

Details and patient eligibility

About

The main goal of this study is to determine optimal cut-off values of adalimumab trough levels corresponding to good clinical response. Determination of these values is necessary to compose a therapeutic algorithm, in which the dosing schedule can be adjusted according to serum trough levels of adalimumab and AAA (anti-adalimumab antibodies). A secondary objective of this study is to further detect and quantify AAA and to correlate them with adalimumab and clinical response in a real life setting cohort of psoriatic patients.

Full description

In a multicenter cross-sectional study, 73 adult patients treated with adalimumab (40 mg) every other week for at least 24 weeks are assessed for psoriasis disease severity through measurement of the Psoriasis Area and Severity Index (PASI) before adalimumab treatment start, and prior to sampling. Patients who interrupted their treatment schedule during the 24 weeks prior to blood sampling are excluded. Samples of patients who were treated with adalimumab for any other inflammatory disease and later developed psoriasis are also excluded. Percentage of PASI improvement compared to baseline (∆PASI) represents clinical response. Patients are classified as nonresponders (∆PASI<50), moderate responders (∆PASI 50-75) or good responders (∆PASI 75-100).Serum is collected for adalimumab trough level and anti-drug antibody determination (Sanquin, The Netherlands). By receiver-operator characteristics (ROC) analysis, a cut-off value of adalimumab trough level can be determined to distinguish insufficient from adequate responders.

Enrollment: 82 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• minimum age 18 years old
• chronic plaque psoriasis
• adalimumab (40mg) subcutaneously every other week
• at least 24 weeks of adalimumab treatment

Exclusion criteria

• interruption of treatment schedule during 24 weeks prior to sampling
• adalimumab for other inflammatory disease and later developed psoriasis

Trial design

82 participants in 1 patient group

Chronic plaque psoriasis

Description:

Patients suffering from chronic plaque psoriasis, treated with adalimumab (40mg) subcutaneously every other week after an initial dose of 80 mg. Treatment duration of at least 24 weeks.