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Medical Faculty
University of Duisburg-Essen
University Hospital
Hufelandstraße 55

45147 Essen

Website

Logo der Universität Duisburg Essen als Wortmarke - Offen im Denken

Status Quo

The Central Animal Laboratory Essen (ZTL - Zentrales Tierlaboratorium Essen) has several animal facilities and is responsible for the welfare-friendly husbandry and breeding of laboratory animals for the University Hospital Essen. In addition, four core facilities of the ZTL (Transgene Unit with cryopreservation, Behavioural Phenotyping, Large Animal and Small Animal Surgery Unit as well as a Laboratory Unit) are available to the researchers on site, whose senior scientific staff support them in their scientific questions. The scientists at UK Essen also have access to the wide range of small animal imaging methods (e.g. small animal PET) of the Imaging Center Essen (IMCES) and the Department of Nulear Medicine. A small animal MRI is also available at the ZTL.

The ZTL also offers assistance with animal experimental procedures as well as lectures and training courses to obtain the necessary expertise (A and B courses). Five animal welfare officers advise researchers on the preparation of animal experiment applications and later work to ensure compliance with animal welfare regulations during their implementation. Many research groups already use well-established replacement or alternative procedures at the site, such as organoid and cell culture models. For single organ analyses, Langendorf apparatus is used by several groups.

Since 2022, an annual animal welfare prize has been awarded for the further development of methods that contribute to the concrete implementation of the 3R principle at the site.

Objective / Focus

The site in Essen has expertise in all 3R fields. The establishment of a 3R professorship is envisaged. The aim of this professorship is to integrate and expand the expertise already available at the site in the field of alternative and replacement methods, to carry out validation projects for new replacement methods and to incorporate the results into research and teaching.

Further development in the field of statistical modeling for the reduction of animal numbers is also being worked on in order to provide even greater support for applicants in the a priori calculation of case numbers. In addition to improved statistical knowledge for more efficient animal count planning, the application of imaging techniques also represents opportunities for animal count reduction that will be targeted for expansion.
In strengthening "Refinement", the focus is on the Core Facility "Behavioural Phenotyping". Core elements of the unit include housing and testing facilities with invertible day-night rhythm, switchable red light, software for video-based behavioral analysis and a variety of test arenas, including IntelliCage systems.