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Students

Helena Edlund (nee Andersson)
Pharmacist / Freie Universität Berlin

Begin: May 2012 - End: December 2017
Supervisor: Prof. Charlotte Kloft
Co-Supervisor: Prof. Wilhelm Huisinga
Mentor: Roche

PhD Project

Pharmacokinetic/pharmacodynamic- guided optimisation of monoclonal antibody therapy in special populations (PhD thesis)

Scientific interests

TNFα antagonists have been shown to have clear benefits for inducing and maintaining clinical remission in both Crohn’s disease and ulcerative colitis. Despite its proven efficacy, not all patients respond to induction therapy and up to 50% of the patients who initially responded lose response over time. The available TNFα antagonists are monoclonal antibodies (mAb) or parts of mAbs. The exact mechanism by which mAbs are cleared from the body is not fully understood and the variability of the elimination rate is high in this population. Additionally, administration of mAbs may lead to development of anti-drug antibodies (ADA). ADA development is a common cause of treatment failure associated with increased risk of infusion reactions and reduced duration of response. ADAs are more frequently seen in patients receiving episodic therapy compared to scheduled therapy. Hence, it is important that the concentration of TNFα antagonists is at a measurable level, at all times, in all patients.

Application of mixed-effects models to data from a population allows for analysis of sparse clinical data. This method also allows investigation of multiple demographic covariates that may explain variability among individuals. The objectives of my PhD project include development of a population pharmacokinetic (PK) model for infliximab (a TNFα antagonist), accounting for sources of variation between individuals as well as the development of ADAs. We are seeking to quantify the influence of these factors on the PK properties and subsequently its effect on the clinical outcome. Development of a more mechanistic model may also contribute to a better understanding of the elimination mechanism of mAbs, the development of ADAs, and make it possible to differentiate between disease specific and drug specific characteristics. Hopefully, the result will provide guidance on how to more efficiently use infliximab and give a better understanding on factors influencing the PK, not only the PK of infliximab but also of other TNFα antagonists.

Publications

Presentations

  • H. Andersson, A. Eser, W. Huisinga, W. Reinisch, C. Kloft.
    Recommendations for dose adjustments of infliximab in Crohn’s disease patients with higher clearance.
    5th American Conference on Pharmacometrics (ACoP), Las Vegas, Nevada, USA, 12-15 Oct 2014.
    J. Pharmacokinet. Pharmacodyn., 41 (Suppl.): S27 (2014).
  • H. Andersson, A. Keunecke, A. Eser, W. Huisinga, W. Reinisch, C. Kloft.
    Pharmacokinetic considerations for optimising dosing regimens of infliximab in patients with Crohn's disease.
    9th European Crohn’s and Colitis Organisation (ECCO) conference, Copenhagen, Denmark, 20-22 Feb 2014.
    ECCO 9: DOP061 [https://www.ecco-ibd.eu/publications/congress-abstract-s/abstracts-2014/item/dop061-pharmacokinetic-considerations-for-optimising-dosing-regimens-of-infliximab-in-patients-with-crohn-s-disease.html], (2014).
  • H. Andersson, A. Keunecke, A. Eser, W. Reinisch, W. Huisinga, C. Kloft
    Clinical relevance of albumin concentration in patients with Crohn’s disease treated with infliximab for recommendations on dosing regimen adjustments
    Population Approach Group in Europe, Glasgow, 2013.
  • H. Andersson
    Pharmacokinetics of infliximab in patients with inflammatory bowel diseases with focus on therapy optimisation.
    2nd PharMetrX Symposium, Fulda, 2013.

Education

  • 08/2012-: Graduate Research Training Program ‘Pharmacometrics & Computational Disease Modeling’ at the Freie Universität Berlin
  • 08/2012: Registered Pharmacist
  • 02/2012 - 07/2012: Pre-registration Internship. DocMorris (now Lloyds) Apotek Bohus (Bohus, Sweden)
  • 08/2011 - 01/2012: Master Thesis “Population Pharmacokinetics of Efavirenz in HIV-Infected Patients”.
    Unit for Pharmacokinetics and Drug Metabolism, Dept. of Pharmacology, Sahlgrenska Academy, University of Gothenburg (Gothenburg, Sweden)
  • 08/2007 - 07/2012: Master of Science, Pharmacy. University of Gothenburg (Gothenburg, Sweden)