An interventional study of Venapuncture and Patient questionnaires in Psoriasis Vulgaris, sponsored by University Hospital, Ghent. Recruiting at 7 sites in Belgium. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-09-19.
Sponsored by University Hospital, Ghent · Not applicable, Interventional, and Treatment
Biologics, such as brodalumab, are currently the most effective treatment option for patients with moderate-to-severe psoriasis. But they are costly for health care systems and prescribed according to a 'one dose fits all' dosing regimen, leading to potential over- and undertreatment. Within this study we aim to investigate the predictive value of early serum trough levels of brodalumab and determine the therapeutic window of brodalumab in psoriasis patients.
Patients will be included after siging informed consent. After inclusion, patients will continue on standard dosing schedule of brodalumab (i.e. one loading dose first (210mg), once a week for 2 weeks (210mg), then a regular dose regimen (210mg) every 2 weeks). During each study visit, blood will be taken in order to quantify Ctroughs and/or anti-drug antibodies towards brodalumab. In addition, the Psoriasis Severity and Area Index (PASI) and the Investigator's Global Assessment (IGA) score will be evaluated by a physician. Patients complete the Dermatology Life Quality Index (DLQI) and European quality of life EQ-5D instrument at each visit.
1,899 studies on the registry are indexed under Psoriasis; 233 are open to participants now.
This study's planned enrollment of 100 is above the median of 70 across 1,447 interventional studies indexed under Psoriasis.
Browse Psoriasis studies →University Hospital, Ghent is the lead sponsor of 665 studies on the registry; 156 are open to participants now.
Of its 5 completed or terminated interventional studies of FDA-regulated products, 4 (80%) have results posted.
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Exclusion Criteria:
Patients will continue to receive brodalumab according to standard care dosing regimen, i.e. loading dose first (210mg), once a week for 2 weeks (210mg), then a regular dose regimen (210mg) every 2 weeks.
Procedure: Venapuncture · Other: Patient questionnaires
Blood samples will be collected to determine the serum trough levels and anti-drug antibodies of brodalumab
The study participant will complete the Dermatology Quality of Life Index (DLQI) and EQ5D5L
Predictive value of early serum trough concentrations of brodalumab
Prediction of the clinical response (PASI) at week 12 and/or week 25 based on serum trough concentrations measurements taken from week 0, 1, 2, 3 and/or 4.
Time frame: Week 0 until week 24 of treatment
Predictive value of early anti-drug antibodies of brodalumab
Prediction of the clinical response (PASI) at week 12 and/or week 24 based on anti-drug antibodies measurements taken from week 0, 1, 2, 3 and/or 4.
Time frame: Week 0 until week 24 of treatment
The development of a therapeutic window of brodalumab in psoriasis
Defining a therapeutic window for brodalumab based on serum trough levels corresponding with adequate clinical response.
Time frame: Week 0 until week 52 of treatment
DLQI
The DLQI (Dermatology Life Quality Index) (range 0-30) is a dermatology specific quality of life (QoL) instrument designed to assess the impact of the disease on participant's QoL. It is a ten item questionnaire that, in addition to evaluated overall QoL, can be used to assess six different aspects that may affect QoL: 1) symptoms and feelings, 2) daily activities, 3) leasure, 4) work or school performances, 5) personal relationships, and 6) treatment. The scoring of each question is as follows: Very much - scored 3; A lot - scored 2; A little - scored 1; Not at all - scored 0; Not relevant - scored 0; Question 7, 'prevented work or studying' - scored 3. The DLQI is calculated by summing the score of each question resulting in a maximum of 30 and a minimum of 0. The higher the score, the more quality of life is impaired.
Time frame: Week 0 until week 52 of treatment
EQ5D5L
EQ5DL comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. The patient is asked to indicate his/her health state by ticking the box next to the most appropriate statement in each of the five dimensions. This decision results in a 1-digit number that expresses the level selected for that dimension. The digits for the five dimensions can be combined into a 5-digit number that describes the patient's health state.
Time frame: Week 0 until week 52 of treatment
EQ VAS
The EQ VAS (Visual Analogue Scale) (range 0-10) records the patient's self-rated health on a vertical visual analogue scale, where the endpoints are labelled 'The best health you can imagine' and 'The worst health you can imagine'. The VAS can be used as a quantitative measure of health outcome that reflect the patient's own judgement.
Time frame: Week 0 until week 52 of treatment
Plan to share: No
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University Hospital, Ghent