Research

Project Details:
When evaluating and tempering the dosimeter (e.g. TLD-100H, Harshaw), a large number of parameters come into effect, which have a significant influence on both the measurement accuracy and the lower detection limit. These parameters are optimized through comparative studies with a view to the highest possible measurement accuracy and a low lower detection limit.

Project Details:
The aim of the work is to record temperature distribution patterns on the horse's head using an infrared camera and to investigate possible connections with pathological processes in the area of ​​the nose, nasal passages, paranasal sinuses and teeth. Furthermore, the influence of various external parameters should be examined. In addition, the influence of patient-related parameters on the IR image is examined.

Project Details:
The aim of the work is to investigate the clinical applicability of the new perometer 1000 P for determining the volume of paw legs. In this context, the measuring accuracy of this new type of perometer in comparison to an older type of perometer (type 1000 K) is to be determined. The aim is to clarify which technical differences exist compared to the previous model, how reliably and precisely the perometer measures compared to this, which sources of error the measurement method contains and how these can be minimized if necessary.

Cooperation Partners:

Prof. Dr. Dirk Berens von Rautenfeld, Funktionelle und angewandte Anatomie, MHH

Project Details:
Roundworms of the genus Toxocara can infect humans and persist in tissues for years or decades. Although the parasite cannot complete its life cycle, the infective larvae migrate through the body and can reach various organs, and thus cause considerable health damage. To characterise the zoonotic risk by roundworms, studies are being conducted on environmental contamination, human infections and evaluation of diagnostic tools. At the level of parasite-host interaction, in addition to immunological interactions, neurological damage in the host as a result of roundworm infection is also being characterised. Thus, not only larval distribution in the entire body of the host, but also the distribution of larvae and resulting damage in the brain is investigated. Here, neuropathological changes and gene regulation in the paratenic host are assessed by histopathology, molecular biological methods and behavioural studies.

Results:

Waindok, P., Janecek-Erfurth, E., Lindenwald, D. L., Wilk, E., Schughart, K., Geffers, R., Strube, C. (2022) Toxocara canis- and Toxocara cati-induced neurotoxocarosis is associated with comprehensive brain transcriptomic alterations. Microorganisms 10, 177

 

Waindok, P., Kann, S., Aristizabal, A., Dib, J. C., Strube, C. (2021) Toxocara seroprevalence and risk factor analysis in four communities of the Wiwa, an indigenous tribe in Colombia. Microorganisms 9, 1768

 

Raulf, M.-K., Lepenies, B., Strube, C. (2021) Toxocara canis and Toxocara cati somatic and excretory-secretory antigens are recognised by C-type lectin receptors. Pathogens 10, 321

 

Waindok, P., Raulf, M. K., Springer, A., Strube, C. (2020) The zoonotic dog roundworm Toxocara canis, a worldwide burden of public health. In: Strube C., Mehlhorn H. (Hrsg.) Dog Parasites Endangering Human Health. Parasitology Research Monographs, Band 13. Springer, Cham, Schweiz. S. 5-26

 

Strube, C., Waindok, P., Raulf, M. K., Springer, A. (2020) Toxocara-induced Neural Larva Migrans (neurotoxocarosis) in rodent model hosts. Advances in Parasitology 109, 189-218

 

Strube, C., Raulf, M. K., Springer, A., Waindok, P., Auer, H. (2020) Seroprevalence of human toxocarosis in Europe - a review and meta-analysis. Advances in Parasitology 109, 375-418

Cooperation Partners:

Prof. Dr. G. Gerold, Medizinische Universität Innsbruck, Österreich

Prof. Dr. B. Lepenies, Ludwig-Maximilians-Universität München

Prof. Dr. M. Pfeffer, Universität Leipzig

Dr. S. Kann, Missionsärztliches Institut Würzburg

Prof. Dr. M. Leschnik, Veterinärmedizinische Universität Wien, Österreich

Funding: Gesellschaft für Kynologische Forschung, Hahn-Stiftung, DFG, DAAD, 30.000 EUR

Project Details:
Die Untersuchung des Liquor cerebrospinalis ist ein wertvolles Instrument, um in vivo Informationen über den Zustand des zentralen Nervensystems zu erhalten. Die darin enthaltenen Zellen reflektieren zumindest teilweise die perivaskuläre Zellpopulation im ZNS. Es wurde daher eine Methode entwickelt, diese Zellen mit Hilfe der Durchflusszytometrie zu charakterisieren. Derzeit werden die Toll-like Rezeptoren näher bestimmt.
In einer 2. Studie wird untersucht, wie sich die Glukose im Liquor cerebrospinalis des Hundes verhält, und ob die Bestimmung von dieser zur Diagnostik beitragen kann oder sich proportional zur Zellzahl bzw. zur Blutglukose verhält.
In weiteren Studien werden verschiedene Biomarker, wie Tau-Protein, Chemokine, Zytokine und Abbauprodukte von Gliazellen und Nervenzellen untersucht, um einen prognostischen Faktor für Rückenmarkserkrankungen zu erhalten. Neue Methoden zur Haltbarmachung der Zellen werden evaluiert. Zusätzlich werden verschiedene Proteine auf ihre Eigenschaft als Biomarker geprüft (ApoE) und IL21.

Funding: teilweise BMBF (Lichtenbergstipendium); Gesellschaft für Kynologische Forschung; Irene und Hans-Joachim Hahn-Stiftung, DAAD, 80.000 EUR

Project Details:
Die steril-eitrige Meningitis-Arteriitis des Hundes (SRMA)ist die häufigste entzündliche Erkrankung des zentralen Nervensystems des Hundes im Norddeutschen Raum. Mit Hilfe mehrerer Pathogenesestudien soll versucht werden, die Erkrankung besser zu charakterisieren, um neue Therapiestrategien entwickeln zu können. Die Zellpopulation in Liquor cerebrospinalis und Blut wurde mit Hilfe durchflusszytometrischer Studien charakterisiert. Studien zur Zytokinexpression sollen helfen, das Phänomen der hohen IgA Produktion zu erleuchten. Die Untersuchung von Toll-like Rezeptoren soll einen Hinweis auf die Ätiologie der Erkrankung liefern. Die Th17 Antwort, NETs und das Endocannabinoidsystem werden näher untersucht.
derzeit laufen Studien, ob IL 21 und ApoE in Kombination mit akute Phase Proteinen von Bedeutung sind. Es wird untersucht, ob IL 21 für neue therapeutische Interventionen eignet.

Results:

Arianna Maiolini, Regina Carlson, M. Schwartz, G. Gandini and Andrea Tipold: "Determination of immunoglobulin A concentrations in the serum and cerebrospinal fluid of dogs: An estimation of its diagnostic value in canine steroid-responsive meningitis-arteritis." The Veterinary Journal, 191, 219-224, 2012

 

S.A. Moore, M.Y. Kim, Arianna Maiolini, Andrea Tipold and M.J. Oglesbee: "Extracellular hsp70 release in Canine Steroid Responsive Menintis-Arteritis." Vet Immunol Immunopathol., 145, 129-133, 2012

 

Arianna Maiolini, Regina Carlson and Andrea Tipold: "Toll-like receptors 4 and 9 are responsible for the maintenance of the inflammatory reaction in canine steroid-responsive meningitis-arteritis, a large animal model for neutrophilic meningitis." J Neuroinflammation 9, 226 (1-12), 2012.

 

Arianna Maiolini, M. Otten, M. Hewicker-Trautwein, R. Carlson and Andrea Tipold: "Interleukin-6, vascular endothelial growth factor and transforming growth fator beta 1 in canine steroid responsive meningitis-arteritis." BMC Veterinary Research, 9:23, 1-10, 2013.

 

J. Freundt-Revilla, A. Maiolini, R. Carlson, M. Beyerbach, K. Rentmeister, T. Flegel, A. Fischer and Andrea Tipold: "Th17 skewed immune response and cluster of differentiation 40 ligand expression in canine steroid-responsive meningitis-arteritis, a large animal model for neutrophilic meningitis." J. Neuroinflammation 14:20, 2017. doi.10.1186/s12974-016-0784-3.

 

J.C. Wohlsein, M. Meurer, M. Mörgelin, J.N. Nessler, T. Flegel, H. Schenk, K. Jurina, K. Rentmeister, A. Fischer, T. Gödde, W. Baumgärtner, M. v.Köckritz-Blickwede and Andrea Tipold: "Neutrophil extracellular traps in CSF and serum of dogs with steroid-responsive meningitis-arteritis." Plos One 19(1):e0295268, 2024

Project Details:
The aim of our project is to investigate the regulation of key signaling pathways involved in lipid metabolism in growing goats under varying nitrogen (N) and phosphorus (P) supply. The focus lies on the INSR-Akt-mTOR and AMPK-LKB1 signaling axes, as well as on FGF21 and PPARγ as central regulators of lipogenesis, lipolysis, and energy homeostasis. In addition, we analyze the role of vitamin D, leptin, CaSR, FGFR1c, and β-Klotho receptors in adipose tissue. A total of 28 young goats are assigned to four dietary groups (control, N-reduced, P-reduced, and combined N- and P-reduced). RNA and proteins are isolated from different adipose depots, and the expression of selected target genes is analyzed by qPCR, while protein abundance is assessed by Western blotting. Metabolic plasma parameters (e.g., glucose, insulin, leptin, calcium, phosphate, and amino acids) are included in the evaluation.

By combining molecular analyses with physiological data, this project aims to clarify how different N and P supplies modulate lipid metabolism and energy-dependent signaling pathways. The study contributes to a better understanding of metabolic adaptation mechanisms in ruminants under nutrient-restricted feeding conditions.

Funding: GDK - Gemeinschaft Deutscher Kryobanken, 5.000 EUR

Project Details:
In animal breeding and biodiversity conservation programs, the use of cryopreserved sperm is becoming increasingly important. Routinely, frozen semen is stored and shipped in liquid nitrogen, which has drawbacks due to its classification as dangerous good and transport costs associated with using (disposable) cryo-containers. Cryopreservation in liquid nitrogen allows for long-term storage, however, this requires bulky ultra-low temperature freezers and/or liquid nitrogen tanks. The latter is associated with high energy-demands and costs, and leaves a large carbon-footprint. If sperm could be preserved at elevated subzero temperatures, e.g., at -80 or -70 °C, without losing their viability, this would make storage and transport easier (e.g., transport on dry ice). Therefore, there is an interest in alternative options for storing and transporting cryopreserved semen, i.e., without the need for liquid nitrogen. The stability of cryopreserved specimens, and minimum storage temperature, can be increased by adding compounds that modulate the glass transition and/or ice (re)crystallization temperature of the freezing formulation. Examples of compounds with such properties are protein and sugar polymers, like polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), polyvinyl alcohol (PVA) and Ficoll. In addition to increasing storage stability at elevated subzero temperatures, some polymer additives in freezing media inhibit ice recrystallization during warming.

Funding: QS-Wissenschaftsfonds, vertreten durch die Qualität und Sicherheit GmbH, Bonn, 37.272 EUR

Project Details:
Animal health data from German cattle farming provide a foundation for the development of a benchmarking system. However, the joint analysis of these data reveals significant data gaps resulting from differing reporting obligations and varying reporting behavior of farms depending on animal group (e.g., beef cattle, dairy cows, etc.) and region. In order to enable a complete and representative assessment of animal health, these gaps must be addressed using appropriate imputation methods.The underlying data originate from cattle-keeping member farms of Qualität und Sicherheit GmbH for the years 2023 and 2024. They include information from the areas of biosecurity, animal husbandry, antibiotic use, and slaughter findings. For a comprehensive evaluation, it is necessary to consider these data areas jointly and to analyze them systematically in order to develop robust indicators for animal health benchmarking.

Cooperation Partners:

Qualität und Sicherheit GmbH, Bonn

Funding: Fritz-Ahrberg-Stiftung, 50.000 EUR

Project Details:
Basidiomycota have increasingly entered the focus of food science and industry in the last years. During their growth, they secrete a variety of lysing and redox-active enzymes and bioactive compounds that positively influence the aroma profile of inoculated foods. Therefore, their potential for the refinement of beef during dry-aging is to be evaluated in this project.