Adalimumab Microneedles in Healthy Volunteers

Adalimumab (Humira, AbbVie) is a highly effective treatment for a variety of auto-immune/auto-inflammatory diseases including juvenile idiopathic arthritis (JIA). Adalimumab works by binding to tumor necrosis factor alpha (TNF), hereby preventing its interaction with the TNF receptor. In the presence of complement, adalimumab can also lyse TNF-expressing cells. Adalimumab is administered via subcutaneous injection, which has the major drawback of being perceived as unpleasant and painful, especially during long term use for both adults and children. As subcutaneous administration may therefore eventually jeopardize treatment adherence, there is a clear need for less invasive alternatives to administer highly effective biological drugs such as adalimumab. Microneedles may be a potential alternative for invasive drug administration. Microneedles are currently widely investigated for the administration of various vaccines. The experience with administration of biological drugs is rather limited. The sparse available data suggests similar pharmacokinetics of adalimumab when administered either subcutaneous or intradermal in healthy volunteers. Moreover, the first studies report good tolerability of microneedles. However, no systematic studies have been performed yet i) to investigate pain, acceptability, and local tolerability for intradermal versus subcutaneous adalimumab administration ii) to evaluate safety, PK and immunogenicity for intradermal versus subcutaneous adalimumab and iii) to explore the usability of optical coherence tomography, clinical photography, thermal imaging and laser speckle contrast imaging in the evaluation of intradermal injections. This study will directly compare the pain perception and hence acceptability of a single dose (40 mg) of adalimumab administered subcutaneously (SC) versus intradermally (ID) via microneedles in healthy adult volunteers. Furthermore, the pharmacokinetic profile, pharmacodynamics, the immunogenicity and the tole